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Chapter 296-62 WAC General Occupational Health Standards Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite PART I-1 ASBESTOS, TREMOLITE, ANTHOPHYLLITE, AND ACTINOLITE WAC 296-62-077 296-62-07701 296-62-07703 296-62-07705 296-62-07706 296-62-07709 296-62-07711 296-62-07712 296-62-07713 296-62-07715 296-62-07717 296-62-07719 296-62-07721 296-62-07722 296-62-07723 296-62-07725 296-62-07727 206-62-07728 296-62-07733 296-62-07735 296-62-07737 296-62-07741 296-62-07743 296-62-07745 296-62-07747 296-62-07749 296-62-07751 296-62-07753 296-62-07755 Asbestos, tremolite, anthophyllite, and actinolite. Scope and application. Definitions. Permissible exposure limits (PEL). Multi-employer worksites. Exposure assessment and monitoring. Regulated areas. Requirements for asbestos activities in construction and shipyard work. Methods of compliance for asbestos activities in general industry. Respiratory protection. Protective work clothing and equipment. Hygiene facilities and practices. Communication of hazards to employees. Employee information and training. Housekeeping. Medical surveillance. Recordkeeping. Competent person. Appendices. Appendix A--WISHA reference method--Mandatory. Appendix B--Detailed procedures for asbestos sampling and analysis--Nonmandatory. Appendix D--Medical questionnaires--Mandatory. Appendix E--Interpretation and classification of chest roentgenograms--Mandatory. Appendix F--Work practices and engineering controls for automotive brake and clutch inspection, disassembly, repair and assembly--Mandatory. Appendix G--Substance technical information for asbestos--Nonmandatory. Appendix H--Medical surveillance guidelines for asbestos--Nonmandatory. Appendix I--Work practices and engineering controls for Class I asbestos operations-- Nonmandatory. Appendix J--Polarized light microscopy of asbestos--Nonmandatory. Appendix K--Smoking Cessation program information for asbestos, tremolite, anthophyllite, and actinolite--Nonmandatory. WAC 296-62-077 Asbestos, tremolite, anthophyllite, and actinolite. [Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62-077, filed 4/27/87.] WAC 296-62-07701 Scope and application. (1) WAC 296-62-07701 through 296-62-07753 applies to all occupational exposures to asbestos in all industries covered by chapter 49.17 RCW, Washington Industrial Safety and Health Act and chapter 49.26 RCW, Health and Safety--Asbestos. (2) This part applies to construction work as defined in WAC 296-155-012 except for work involving asbestos-containing asphalt roof coatings, cements, and mastics. The exception for roofing materials does not apply to asphalt coated asbestos felting and similar built-up roofing. Part I-1, Page 1 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07701 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (3) This part applies to ship repairing, shipbuilding and shipbreaking employments and related employments as defined in WAC 296-304-01001 except for work involving asbestos-containing asphalt roof coatings, cements, and mastics. The exception for roofing materials does not apply to asphalt coated asbestos felting and similar built-up roofing. [Statutory Authority: RCW 49.17.040, .050, RCW 49.26.040 and RCW 49.26.130. 99-17-026 (Order 98-35), 296-62-07701, filed 08/10/99, effective 11/10/99. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07701, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 87-24-051 (Order 87-24), 296-62-07701, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62-07701, filed 4/27/87.] WAC 296-62-07703 Definitions. For the purpose of WAC 296-62-07701 through 296-62-07753: Accredited inspector means any person meeting the accreditation requirements of the Federal Toxic Substance Control Act, Section 206(a)(1) and (3). 15 U.S.C. 2646(a)(1) and (3). Aggressive method means removal or disturbance of building material by sanding, abrading, grinding or other method that breaks, crumbles, or disintegrates intact ACM. Amended water means water to which surfactant (wetting agent) has been added to increase the ability of the liquid to penetrate ACM. Asbestos includes chrysotile, amosite, crocidolite, tremolite asbestos, anthophyllite asbestos, actinolite asbestos, and any of these minerals that have been chemically treated and/or altered. For purposes of this standard, "asbestos" includes PACM, as defined below. Asbestos abatement project means an asbestos project involving three square feet or three linear feet, or more, of asbestos-containing material. Asbestos-containing material (ACM) means any material containing more than 1% asbestos. Asbestos project - includes the construction, demolition, repair, remodeling, maintenance or renovation of any public or private building or structure, mechanical piping equipment or system involving the demolition, removal, encapsulation, salvage, or disposal of material or outdoor activity releasing or likely to release asbestos fibers into the air. Authorized person means any person authorized by the employer and required by work duties to be present in regulated areas. Building/facility/vessel owner means any legal entity or person who owns any public or private building, vessel, structure, facility, or mechanical system or the remnants thereof, including the agent of such person, but does not include individuals who work on asbestos projects in their own single-family residences, no part of which is used for commercial purposes. Also included is any lessee, who exercises control over management and recordkeeping functions relating to a building, vessel, and/or facility in which activities covered by this standard takes place. Certified asbestos supervisor means an individual certified by the department under WAC 296-65-012. Certified asbestos worker means an individual certified by the department under WAC 296-65-010. Certified industrial hygienist (CIH) means one certified in the practice of industrial hygiene by the American Board of Industrial Hygiene. Part I-1, Page 2 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07703 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite Class I asbestos work means activities involving the removal of thermal system insulation or surfacing ACM/PACM. Class II asbestos work means activities involving the removal of ACM which is not thermal system insulation or surfacing material. This includes, but is not limited to, the removal of asbestos-containing wallboard, floor tile and sheeting, roofing and siding shingles, and construction mastics. Class III asbestos work means repair and maintenance operations where "ACM," including TSI and surfacing ACM and PACM, may be disturbed. Class IV asbestos work means maintenance and custodial activities during which employees contact but do not disturb ACM or PACM and activities to clean up dust, waste and debris resulting from Class I, II, and III activities. Clean room means an uncontaminated room having facilities for the storage of employees' street clothing and uncontaminated materials and equipment. Closely resemble means that the major workplace conditions which have contributed to the levels of historic asbestos exposure, are no more protective than conditions of the current workplace. Competent person means, in addition to the definition in WAC 296-62-07728, one who is capable of identifying existing asbestos, hazards in the workplace and selecting the appropriate control strategy for asbestos exposure, who has the authority to take prompt corrective measures to eliminate them as specified in WAC 296-62-07728. The competent person shall be certified as an asbestos supervisor in compliance with WAC 296-65-030(3) and 296-65 012 for Class I and Class II work, and for Class III and Class IV work involving 3 square feet or 3 linear feet or more of asbestos-containing material. For Class III and Class IV work, involving less than 3 square feet or 3 linear feet, the competent person shall be trained in an operations and maintenance (O&M) course which meets the criteria of EPA (40 CFR 763.92(a)(2)). Critical barrier means one or more layers of plastic sealed over all openings into a work area or any other similarly placed physical barrier sufficient to prevent airborne asbestos in a work area from migrating to an adjacent area. Decontamination area means an enclosed area adjacent and connected to the regulated area and consisting of an equipment room, shower area, and clean room, which is used for the decontamination of workers, materials, and equipment contaminated with asbestos. Demolition means the wrecking or taking out of any load-supporting structural member and any related razing, removing, or stripping of asbestos products. Where feasible, asbestos-containing materials shall be removed from all structures prior to the commencement of any demolition activity as per WAC 296-155-775(9). Department means the department of labor and industries. Director means the director of the department of labor and industries or his/her authorized representative. Director of NIOSH means the Director, National Institute for Occupational Safety and Health, U.S. Department of Health and Human Services, or designee. Disturb or disturbance refers to activities that disrupt the matrix of ACM or PACM, crumble or pulverize ACM or PACM, or generate visible debris from ACM or PACM. This term includes activities that disrupt the matrix of ACM or PACM, render ACM or PACM friable, or generate visible debris. Disturbance includes cutting away small amounts of ACM or PACM, no greater than the amount that can be contained in one standard size glove bag or waste bag in order to access a building or vessel component. In no event shall the amount of ACM or PACM so disturbed exceed that which can be contained in one glove bag or waste bag which shall not exceed 60 inches in length and width. Part I-1, Page 3 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07703 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite Employee exposure means that exposure to airborne asbestos that would occur if the employee were not using respiratory protective equipment. Equipment room (change room) means a contaminated room located within the decontamination area that is supplied with impermeable bags or containers for the disposal of contaminated protective clothing and equipment. Fiber means a particulate form of asbestos, five micrometers or longer, with a length-to-diameter ratio of at least three to one. Glove bag means not more than a 60 x 60 inch impervious plastic bag-like enclosure affixed around an asbestoscontaining material, with glove-like appendages through which material and tools may be handled. High-efficiency particulate air (HEPA) filter means a filter capable of trapping and retaining at least 99.97 percent of all monodispersed particles of 0.3 micrometers mean aerodynamic diameter or larger. Homogeneous area means an area of surfacing material or thermal system insulation that is uniform in color and texture. Industrial hygienist means a professional qualified by education, training, and experience to anticipate, recognize, evaluate and develop controls for occupational health hazards. Intact means that the ACM has not crumbled, been pulverized, or otherwise deteriorated so that the asbestos is no longer likely to be bound with its matrix. Friable ACM that is disturbed, as defined in this part, is presumed to be no longer intact. Modification for the purpose of WAC 296-62-07712 means a changed or altered procedure, material or component of a control system, which replaces a procedure, material or component of a required system. Omitting a procedure or component, or reducing or diminishing the stringency or strength of a material or component of the control system is not a "modification" for the purposes of WAC 296-62-07712. Negative initial exposure assessment means a demonstration by the employer (which complies with the criteria in WAC 296-62-07709) that employee exposure during an operation is expected to be consistently below the PELs. PACM means "presumed asbestos-containing material." Presumed asbestos-containing material means thermal system insulation and surfacing material found in buildings, vessels, and vessel sections constructed no later than 1980. The designation of a material as "PACM" may be rebutted pursuant to WAC 296-62-07721. Project designer means a person who has successfully completed the training requirements for an abatement project designer established by 40 U.S.C. 763.90(g). Regulated area means an area established by the employer to demarcate areas where Class I, II, and III asbestos work is conducted, and any adjoining area where debris and waste from such asbestos work accumulate; and a work area within which airborne concentrations of asbestos, exceed or can reasonably be expected to exceed the permissible exposure limit. Requirements for regulated areas are set out in WAC 296-62-07711. Removal means all operations where ACM and/or PACM is taken out or stripped from structures or substrates, and includes demolition operations. Part I-1, Page 4 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07703 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite Renovation means the modifying of any existing vessel, vessel section, structure, or portion thereof. Repair means overhauling, rebuilding, reconstructing, or reconditioning of vessels, vessel sections, structures or substrates, including encapsulation or other repair of ACM or PACM attached to vessels, vessel sections, structures or substrates. Surfacing material means material that is sprayed, troweled-on or otherwise applied to surfaces (such as acoustical plaster on ceilings and fireproofing materials on structural members, or other materials on surfaces for acoustical, fireproofing, and other purposes). Surfacing ACM means surfacing material which contains more than 1% asbestos. Thermal system insulation (TSI) means ACM applied to pipes, fittings, boilers, breaching, tanks, ducts, or other structural components to prevent heat loss or gain. Thermal system insulation ACM is thermal system insulation which contains more than 1% asbestos. [Statutory Authority: RCW 49.17.040, .050, RCW 49.26.040 and RCW 49.26.130. 99-17-026 (Order 98-35), 296-62-07703, filed 08/10/99, effective 11/10/99. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07703, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 89-21-018 (Order 89-10), 296-62-07703, filed 10/10/89, effective 11/24/89; 89-11-035 (Order 89-03), 296-62-07703, filed 5/15/89, effective 6/30/89; 87-24-051 (Order 87-24), 296-62-07703, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62-07703, filed 4/27/87.] WAC 296-62-07705 Permissible exposure limits (PEL). (1) Time weighted average (TWA). The employer shall ensure that no employee is exposed to an airborne concentration of asbestos in excess of 0.1 fiber per cubic centimeter (0.1 f/cc) of air as an eight-hour timeweighted average (TWA) as determined by the method prescribed in Appendix A of this part, or by an equivalent method recognized by the department. (2) Excursion limit. The employer shall ensure that no employee is exposed to an airborne concentration of asbestos in excess of 1.0 fiber per cubic centimeter of air (1 f/cc) as averaged over a sampling period of thirty minutes, as determined by the method prescribed in Appendix A of this part, or by an equivalent method recognized by the department. [Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07705, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 89-11-035 (Order 89-03), 296-62-07705, filed 5/15/89, effective 6/30/89; 87-24-051 (Order 87-24), 296-62-07705, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296 62-07705, filed 4/27/87.] WAC 296-62-07706 Multi-employer worksites. (1) On multi-employer worksites, an employer performing work requiring the establishment of a regulated area shall inform other employers on the site of the nature of the employer's work with asbestos and/or PACM, of the existence of and requirements pertaining to regulated areas, and the measures taken to ensure that employees of such other employers are not exposed to asbestos. (2) Asbestos hazards at a multi-employer worksite shall be abated by the employer who created or controls the source of asbestos contamination. For example, if there is a significant breach of an enclosure containing Class I work, the employer responsible for erecting the enclosure shall repair the breach immediately. (3) In addition, all employers of employees exposed to asbestos hazards shall comply with applicable protective provisions to protect their employees. For example, if employees working immediately adjacent to a Class I asbestos job are exposed to asbestos due to the inadequate containment of such jobs, their employer shall either remove the employees from the area until the enclosure breach is repaired; or perform an initial exposure assessment pursuant to WAC 296-62-07709. Part I-1, Page 5 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07706 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (4) All employers of employees working adjacent to regulated areas established by another employer on a multi-employer worksite, shall take steps on a daily basis to ascertain the integrity of the enclosure and/or the effectiveness of the control method relied on by the primary asbestos contractor to assure that asbestos fibers do not migrate to such adjacent areas. (5) All general contractors on a construction project which includes work covered by this standard shall be deemed to exercise general supervisory authority over the work covered by this standard, even though the general contractor is not qualified to serve as the asbestos "competent person" as defined by WAC 296-62 07703. As supervisor of the entire project, the general contractor shall ascertain whether the asbestos contractor is in compliance with this standard, and shall require such contractor to come into compliance with this standard when necessary. [Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07706, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 94-16-145, 296-62-07706, filed 8/3/94, effective 9/12/94; 87-24-051 (Order 87-24), 296 62-07706, filed 11/30/87.] WAC 296-62-07709 Exposure assessment and monitoring. (1) General monitoring criteria. (a) Each employer who has a workplace or work operation where exposure monitoring is required under this part must perform monitoring to determine accurately the airborne concentrations of asbestos to which employees may be exposed. (b) Determinations of employee exposure must be made from breathing zone air samples that are representative of the eight-hour TWA and thirty minute short-term exposures of each employee. (c) Representative eight-hour TWA employee exposures must be determined on the basis of one or more samples representing full-shift exposure for each shift for each employee in each job classification in each work area. (d) Representative thirty minute short-term employee exposures must be determined on the basis of one or more samples representing thirty minute exposures associated with operations that are most likely to produce exposures above the excursion limit for each shift for each job classification in each work area. (2) Exposure monitoring requirements for all occupational exposures to asbestos in all industries covered by the Washington Industrial Safety and Health Act except construction work, as defined in WAC 296-155 012, and except ship repairing, shipbuilding and shipbreaking employments and related employments as defined in WAC 296-304-01001. (a) Initial monitoring. (i) Each employer who has a workplace or work operation covered by this standard, except as provided for in (a)(ii) and (iii) of this subsection, must perform initial monitoring of employees who are, or may reasonably be expected to be exposed to airborne concentrations at or above the TWA permissible exposure limit and/or excursion limit. The initial monitoring must be at the initiation of each asbestos job to accurately determine the airborne concentration of asbestos to which employees may be exposed. Part I-1, Page 6 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07709 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (ii) Where the employer or his/her representative has monitored after March 31, 1992, for the TWA permissible exposure limit and/or excursion limit, and the monitoring satisfies all other requirements of this section, and the monitoring data was obtained during work operations conducted under workplace conditions closely resembling the processes, type of material including percentage of asbestos, control methods, work practices, and environmental conditions used and prevailing in the employer's current operations, the employer may rely on such earlier monitoring results to satisfy the requirements of (a)(i) of this subsection. (iii) Where the employer has relied upon objective data that demonstrates that asbestos is not capable of being released in airborne concentrations at or above the TWA permissible exposure limit and/or excursion limit under those work conditions of processing, use, or handling expected to have the greatest potential for releasing asbestos, then no initial monitoring is required. (b) Monitoring frequency (periodic monitoring) and patterns. After the initial determinations required by subsection (2)(a)(i) of this section, samples must be of such frequency and pattern as to represent with reasonable accuracy the levels of exposure of the employees. Sampling must not be at intervals greater than six months for employees whose exposures may reasonably be foreseen to exceed the TWA permissible exposure limit and/or excursion limit. (c) Daily monitoring within regulated areas: The employer must conduct daily monitoring that is representative of the exposure of each employee who is assigned to work within a regulated area. Exception: When all employees within a regulated area are equipped with full facepiece suppliedair respirators operated in the pressure-demand mode equipped with either an auxiliary positive pressure self-contained breathing apparatus or a HEPA filter, the employer may dispense with the daily monitoring required by this subsection. (d) Changes in monitoring frequency. If either the initial or the periodic monitoring required by subsection (2)(a) and (b) of this section statistically indicates that employee exposures are below the TWA permissible exposure limit and/or excursion limit, the employer may discontinue the monitoring for those employees whose exposures are represented by such monitoring. (e) Additional monitoring. Notwithstanding the provisions of subsection (2)(a)(ii) and (c) of this section, the employer must institute the exposure monitoring required under subsection (2)(a)(i) and (ii) of this section whenever there has been a change in the production, process, control equipment, personnel, or work practices that may result in new or additional exposures above the TWA permissible exposure limit and/or excursion limit, or when the employer has any reason to suspect that a change may result in new or additional exposures above the TWA permissible exposure limit and/or excursion limit. (3) Exposure assessment monitoring requirements for all construction work as defined in WAC 296-155-012 and for all ship repairing, shipbuilding and shipbreaking employments and related employments as defined in WAC 296-304-01001. (a) Initial exposure assessment. (i) Each employer who has a workplace or work operation covered by this standard must ensure that a "competent person" conducts an exposure assessment immediately before or at the initiation of the operation to ascertain expected exposures during that operation or workplace. The assessment must be completed in time to comply with the requirements which are triggered by exposure data or lack of a "negative exposure assessment," and to provide information necessary to assure that all control systems planned are appropriate for that operation and will work properly. Part I-1, Page 7 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07709 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (ii) Basis of initial exposure assessment: Unless a negative exposure assessment has been made according to (b) of this subsection, the initial exposure assessment must, if feasible, be based on monitoring conducted according to (b) of this subsection. The assessment must take into consideration both the monitoring results and all observations, information or calculations which indicate employee exposure to asbestos, including any previous monitoring conducted in the workplace, or of the operations of the employer which indicate the levels of airborne asbestos likely to be encountered on the job. For Class I asbestos work, until the employer conducts exposure monitoring and documents that employees on that job will not be exposed in excess of the PELs, or otherwise makes a negative exposure assessment according to (b) of this subsection, the employer must presume that employees are exposed in excess of the TWA and excursion limit. (b) Negative exposure assessment: For any one specific asbestos job which will be performed by employees who have been trained in compliance with the standard, the employer may demonstrate that employee exposures will be below the PELs by data which conform to the following criteria: (i) Objective data demonstrating that the products or material containing asbestos minerals or the activity involving such product or material cannot release airborne fibers in concentrations exceeding the TWA and excursion limit under those work conditions having the greatest potential for releasing asbestos; or (ii) Where the employer has monitored prior asbestos jobs for the PEL and the excursion limit within 12 months of the current or projected job, the monitoring and analysis were performed in compliance with the asbestos standard in effect; and the data was obtained during work operations conducted under workplace conditions "closely resembling" the processes, type of material including percentage of asbestos, control methods, work practices, and environmental conditions used and prevailing in the employer's current operations, the operations were conducted by employees whose training and experience are no more extensive than that of employees performing the current job, and these data show that under the conditions prevailing and which will prevail in the current workplace there is a high degree of certainty that employee exposures will not exceed the TWA or excursion limit; or (iii) The results of initial exposure monitoring of the current job made from breathing zone samples that are representative of the 8-hour TWA and 30-minute short-term exposures of each employee covering operations which are most likely during the performance of the entire asbestos job to result in exposures over the PELs. (c) Periodic monitoring. (i) Class I and Class II operations. The employer must conduct daily monitoring that is representative of the exposure of each employee who is assigned to work within a regulated area who is performing Class I or II work, unless the employer according to (b) of this subsection, has made a negative exposure assessment for the entire operation. (ii) All operations under the standard other than Class I and II operations. The employer must conduct periodic monitoring of all work where exposures are expected to exceed a PEL, at intervals sufficient to document the validity of the exposure prediction. Part I-1, Page 8 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07709 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (iii) Exception. When all employees required to be monitored daily are equipped with supplied-air respirators operated in the pressure demand mode, the employer may dispense with the daily monitoring required by subsection (2)(c) of this section. However, employees performing Class I work using a control method which is not listed in WAC 296-62-07712 or using a modification of a listed control method, must continue to be monitored daily even if they are equipped with supplied-air respirators. (d) Termination of monitoring. If the periodic monitoring required by (c) of this subsection reveals that employee exposures, as indicated by statistically reliable measurements, are below the permissible exposure limit and excursion limit the employer may discontinue monitoring for those employees whose exposures are represented by such monitoring. (e) Monitoring outside negative-pressure enclosures: The employer must conduct representative area monitoring of the airborne fiber levels at least every other day at the HEPA machine exhaust and entrance to the decontamination area. (f) Additional monitoring. Notwithstanding the provisions of (b), (c), and (d) of this subsection, the employer must institute the exposure monitoring required under (c) of this subsection whenever there has been a change in process, control equipment, personnel or work practices that may result in new or additional exposures above the permissible exposure limit and/or excursion limit or when the employer has any reason to suspect that a change may result in new or additional exposures above the permissible exposure limit and/or excursion limit. Such additional monitoring is required regardless of whether a "negative exposure assessment" was previously produced for a specific job. (g) Preabatement monitoring. Prior to the start of asbestos work, respresentative area monitoring must be conducted for comparison to clearance monitoring as required by subsection (3)(h) of this section. Preabatement air monitoring is not required for outdoor work. (h) Clearance monitoring. Representative area air monitoring must be taken at the completion of the asbestos work. Air sample results must be obtained before removal or reoccupancy of the regulated area. Clearance air monitoring is not required for outdoor asbestos work. The employer must demonstrate by monitoring that the airborne concentration is below: The permissible exposure limit; or At or below the airborne fiber level existing prior to the start of the asbestos work, whichever level is lower. (4) Method of monitoring. (a) All samples taken to satisfy the employee exposure monitoring requirements of this section must be personal samples collected following the procedures specified in WAC 296-62-07735, Appendix A. (b) Monitoring must be performed by persons having a thorough understanding of monitoring principles and procedures and who can demonstrate proficiency in sampling techniques. (c) All samples taken to satisfy the monitoring requirements of this section must be evaluated using the WISHA reference method specified in WAC 296-62-07735, Appendix A, or an equivalent counting method recognized by the department. Part I-1, Page 9 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07709 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (d) If an equivalent method to the WISHA reference method is used, the employer must ensure that the method meets the following criteria: (i) Replicate exposure data used to establish equivalency are collected in side-by-side field and laboratory comparisons; and (ii) The comparison indicates that ninety percent of the samples collected in the range 0.5 to 2.0 times the permissible limit have an accuracy range of plus or minus twenty-five percent of the WISHA reference method results at a ninety-five percent confidence level as demonstrated by a statistically valid protocol; and (iii) The equivalent method is documented and the results of the comparison testing are maintained. (e) To satisfy the monitoring requirements of this section, employers must use the results of monitoring analysis performed by laboratories which have instituted quality assurance programs that include the elements as prescribed in WAC 296-62-07735, Appendix A. (5) Employee notification of monitoring results. (a) The employer must, as soon as possible but no later than within five days for construction and shipyard industries and fifteen working days for other industries, after the receipt of the results of any monitoring performed under the standard, notify the affected employees of these results in writing either individually or by posting of results in an appropriate location that is accessible to affected employees. (b) The written notification required by (a) of this subsection must contain the corrective action being taken by the employer to reduce employee exposure to or below the TWA and/or excursion exposure limits, wherever monitoring results indicated that the TWA and/or excursion exposure limits had been exceeded. (6) Observation of monitoring. (a) The employer must provide affected employees or their designated representatives an opportunity to observe any monitoring of employee exposure to asbestos conducted in accordance with this section. (b) When observation of the monitoring of employee exposure to asbestos requires entry into an area where the use of protective clothing or equipment is required, the observer must be provided with and be required to use such clothing and equipment and shall comply with all other applicable safety and health procedures. [Statutory Authority: RCW 49.17.010, .040, .050, and .060. 06-05-027 (Order 05-45), 296-62-07709, filed 02/07/06, effective 04/01/06. Statutory Authority: RCW 49.17.010, .040, .050 and RCW 49.26.130. 00-06-075 (Order 99-40), 296-62-07709, filed 03/01/00, effective 04/10/00. Statutory Authority: RCW 49.17.040, .050, RCW 49.26.040 and RCW 49.26.130. 99-17-026 (Order 98-35), 296-62-07709, filed 08/10/99, effective 11/10/99. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97 01-079, 296-62-07709, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 89-11-035 (Order 89-03), 296-62 07709, filed 5/15/89, effective 6/30/89; 87-24-051 (Order 87-24), 296-62-07709, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62-07709, filed 4/27/87.] WAC 296-62-07711 Regulated areas. (1) General. The employer shall establish a regulated area in work areas where airborne concentrations of asbestos exceed or can reasonably be expected to exceed the permissible exposure limits prescribed in WAC 296-62-07705. All Class I, II and III asbestos work shall be conducted within regulated areas. All other operations covered by this standard shall be conducted within the regulated area where airborne concentrations of asbestos exceed or can reasonably be expected to exceed permissible exposure limits. Regulated areas shall comply with the requirements of subsections (2), (3), (4), (5), (6), (7), and (8) of this section. Part I-1, Page 10 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07711 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (2) Demarcation. The regulated area shall be demarcated in any manner that minimizes the number of persons within the area and protects persons outside the area from exposure to airborne asbestos. Where critical barriers or negative pressure enclosures are used, they may demarcate the regulated area. Signs shall be provided and displayed pursuant to the requirements of WAC 296-62-07721. (3) Access. Access to regulated areas shall be limited to authorized persons or to persons authorized by the Washington Industrial Safety and Health Act or regulations issued pursuant thereto. (4) Provision of respirators. Each person entering a regulated area where employees are required in WAC 296-62-07715(1) to wear respirators shall be supplied with and required to use a respirator, selected in accordance with WAC 296-62-07715(2). (5) Protective clothing. All persons entering a regulated area shall be supplied with and required to wear protective clothing, selected in accordance with WAC 296-62-07717. (6) Prohibited activities. The employer shall ensure that employees do not eat, drink, smoke, chew tobacco or gum, or apply cosmetics in the regulated areas. (7) Permit-required confined space. The employer shall determine if a permit-required confined space hazard exists and shall take any necessary precautions in accordance with chapter 296-62 WAC Part M. (8) Competent persons. For construction and shipyard work the employer shall ensure that all asbestos work performed within regulated areas is supervised by a competent person, as defined in WAC 296-62-07703. The duties of the competent person are set out in WAC 296-62-07728. [Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-19-014, 296-62-07711, filed 9/5/97, effective 11/5/97. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07711, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 95-04-007, 296-62-07711, filed 1/18/95, effective 3/1/95; 93-19-142 (Order 93-04), 296 62-07711, filed 9/22/93, effective 11/1/93; 89-11-035 (Order 89-03), 296-62-07711, filed 5/15/89, effective 6/30/89; 87-24-051 (Order 87-24), 296-62-07711, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62 07711, filed 4/27/87.] WAC 296-62-07712 Requirements for asbestos activities in construction and shipyard work. (1) Methods of compliance, the following engineering controls and work practices of this section must be used for construction work defined in WAC 296-155-012 and for all ship repair defined in WAC 296-304-010. (2) Engineering controls and work practices for all operations covered by this section. The employer must use the following engineering controls and work practices in all operations covered by this section, regardless of the levels of exposure: (a) Vacuum cleaners equipped with HEPA filters to collect all debris and dust containing ACM and PACM, except as provided in subsection (10)(b) of this section in the case of roofing material. (b) Wet methods, or wetting agents, to control employee exposures during asbestos handling, mixing, removal, cutting, application, and cleanup, except where employers demonstrate that the use of wet methods is infeasible due to, for example, the creation of electrical hazards, equipment malfunction, and, in roofing, except as provided in subsection (10)(b) of this section. (c) Asbestos must be handled, mixed, applied, removed, cut, scored, or otherwise worked in a wet saturated state to prevent the emission of airborne fibers unless the usefulness of the product would be diminished thereby. Part I-1, Page 11 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07712 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (d) Prompt cleanup and disposal of wastes and debris contaminated with asbestos in leak-tight containers except in roofing operations, where the procedures specified in this section apply. (3) In addition to the requirements of subsection (2) of this section, the employer must use the following control methods to achieve compliance with the TWA permissible exposure limit and excursion limit prescribed by WAC 296-62-07705: (a) Local exhaust ventilation equipped with HEPA filter dust collection systems; (b) Enclosure or isolation of processes producing asbestos dust; (c) Ventilation of the regulated area to move contaminated air away from the breathing zone of employees and toward a filtration or collection device equipped with a HEPA filter; (d) Use of other work practices and engineering controls that the department can show to be feasible; (e) Wherever the feasible engineering and work practice controls described above are not sufficient to reduce employee exposure to or below the permissible exposure limit and/or excursion limit prescribed in WAC 296-62-07705, the employer must use them to reduce employee exposure to the lowest levels attainable by these controls and must supplement them by the use of respiratory protection that complies with the requirements of WAC 296-62-07715. (4) Prohibitions. The following work practices and engineering controls must not be used for work related to asbestos or for work which disturbs ACM or PACM, regardless of measured levels of asbestos exposure or the results of initial exposure assessments: (a) High-speed abrasive disc saws that are not equipped with point or cut ventilator or enclosures with HEPA filtered exhaust air; (b) Compressed air used to remove asbestos, or materials containing asbestos, unless the compressed air is used in conjunction with an enclosed ventilation system designed to capture the dust cloud created by the compressed air; (c) Dry sweeping, shoveling or other dry cleanup of dust and debris containing ACM and PACM; (d) Employee rotation as a means of reducing employee exposure to asbestos. (5) Cleanup. (a) After completion of asbestos work (removal, demolition, and renovation operations), all surfaces in and around the work area must be cleared of any asbestos debris. (b) Encapsulant must be applied to all areas where asbestos has been removed to ensure binding of any remaining fibers. (6) Class I requirements. The following engineering controls and work practices and procedures must be used: (a) All Class I work, including the installation and operation of the control system must be supervised by a competent person as defined in WAC 296-62-07703; Part I-1, Page 12 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07712 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (b) For all Class I jobs involving the removal of more than 25 linear or 10 square feet of thermal system insulation or surfacing material; for all other Class I jobs, where the employer cannot produce a negative exposure assessment according to WAC 296-62-07709(3), or where employees are working in areas adjacent to the regulated area, while the Class I work is being performed, the employer must use one of the following methods to ensure that airborne asbestos does not migrate from the regulated area: (i) Critical barriers must be placed over all the openings to the regulated area, except where activities are performed outdoors; or (ii) The employer must use another barrier or isolation method which prevents the migration of airborne asbestos from the regulated area, as verified by perimeter area surveillance during each work shift at each boundary of the regulated area, showing no visible asbestos dust; and perimeter area monitoring showing that clearance levels contained in 40 CFR Part 763, Subpart E, of the EPA Asbestos in Schools Rule are met, or that perimeter area levels, measured by Phase Contrast Microscopy (PCM) are no more than background levels representing the same area before the asbestos work began. The results of such monitoring must be made known to the employer no later than 24 hours from the end of the work shift represented by such monitoring. Exception: For work completed outdoors where employees are not working in areas adjacent to the regulated areas, (a) of this subsection is satisfied when the specific control methods in subsection (7) of this section are used; (c) For all Class I jobs, HVAC systems must be isolated in the regulated area by sealing with a double layer of 6 mil plastic or the equivalent; (d) For all Class I jobs, impermeable dropcloths shall be placed on surfaces beneath all removal activity; (e) For all Class I jobs, all objects within the regulated area must be covered with impermeable dropcloths or plastic sheeting which is secured by duct tape or an equivalent; (f) For all Class I jobs where the employer cannot produce a negative exposure assessment, or where exposure monitoring shows that a PEL is exceeded, the employer must ventilate the regulated area to move contaminated air away from the breathing zone of employees toward a HEPA filtration or collection device. (7) Specific control methods for Class I work. In addition, Class I asbestos work must be performed using one or more of the following control methods according to the limitations stated below: (a) Negative pressure enclosure (NPE) systems: NPE systems may be used where the configuration of the work area does not make the erection of the enclosure infeasible, with the following specifications and work practices: (i) Specifications: (A) The negative pressure enclosure (NPE) may be of any configuration; (B) At least 4 air changes per hour must be maintained in the NPE; Part I-1, Page 13 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07712 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (C) A minimum of -0.02 column inches of water pressure differential, relative to outside pressure, must be maintained within the NPE as evidenced by manometric measurements; (D) The NPE must be kept under negative pressure throughout the period of its use; and (E) Air movement must be directed away from employees performing asbestos work within the enclosure, and toward a HEPA filtration or collection device. (ii) Work practices: (A) Before beginning work within the enclosure and at the beginning of each shift, the NPE must be inspected for breaches and smoke-tested for leaks, and any leaks sealed. (B) Electrical circuits in the enclosure must be deactivated, unless equipped with ground-fault circuit interrupters. (b) Glove bag systems may be used to remove PACM and/or ACM from straight runs of piping and elbows and other connections with the following specifications and work practices: (i) Specifications: (A) Glove bags must be made of 6 mil thick plastic and must be seamless at the bottom. (B) Glove bags used on elbows and other connections must be designed for that purpose and used without modifications. (ii) Work practices: (A) Each glove bag must be installed so that it completely covers the circumference of pipe or other structure where the work is to be done. (B) Glove bags must be smoke-tested for leaks and any leaks sealed prior to use. (C) Glove bags may be used only once and may not be moved. (D) Glove bags must not be used on surfaces whose temperature exceeds 150oF. (E) Prior to disposal, glove bags must be collapsed by removing air within them using a HEPA vacuum. (F) Before beginning the operation, loose and friable material adjacent to the glove bag/box operation must be wrapped and sealed in two layers of six mil plastic or otherwise rendered intact. (G) Where system uses attached waste bag, such bag must be connected to collection bag using hose or other material which must withstand pressure of ACM waste and water without losing its integrity. Part I-1, Page 14 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07712 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (H) Sliding valve or other device must separate waste bag from hose to ensure no exposure when waste bag is disconnected. (I) At least two persons must perform Class I glove bag removal operations. (c) Negative pressure glove bag systems. Negative pressure glove bag systems may be used to remove ACM or PACM from piping. (i) Specifications: In addition to specifications for glove bag systems above, negative pressure glove bag systems must attach HEPA vacuum systems or other devices to bag during removal. (ii) Work practices: (A) The employer must comply with the work practices for glove bag systems in this section. (B) The HEPA vacuum cleaner or other device used during removal must run continually during the operation until it is completed at which time the bag must be collapsed prior to removal of the bag from the pipe. (C) Where a separate waste bag is used along with a collection bag and discarded after one use, the collection bag may be reused if rinsed clean with amended water before reuse. (d) Negative pressure glove box systems: Negative pressure glove boxes may be used to remove ACM or PACM from pipe runs with the following specifications and work practices: (i) Specifications: (A) Glove boxes must be constructed with rigid sides and made from metal or other material which can withstand the weight of the ACM and PACM and water used during removal. (B) A negative pressure generator must be used to create negative pressure in the system. (C) An air filtration unit must be attached to the box. (D) The box must be fitted with gloved apertures. (E) An aperture at the base of the box must serve as a bagging outlet for waste ACM and water. (F) A back-up generator must be present on site. (G) Waste bags must consist of 6 mil thick plastic double-bagged before they are filled or plastic thicker than 6 mil. (ii) Work practices: (A) At least two persons must perform the removal. Part I-1, Page 15 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07712 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (B) The box must be smoke-tested for leaks and any leaks sealed prior to each use. (C) Loose or damaged ACM adjacent to the box must be wrapped and sealed in two layers of 6 mil plastic prior to the job, or otherwise made intact prior to the job. (D) A HEPA filtration system must be used to maintain pressure barrier in box. (e) Water spray process system. A water spray process system may be used for removal of ACM and PACM from cold line piping if, employees carrying out such process have completed a 40hour separate training course in its use, in addition to training required for employees performing Class I work. The system must meet the following specifications and shall be performed by employees using the following work practices: (i) Specifications: (A) Piping must be surrounded on 3 sides by rigid framing. (B) A 360 degree water spray, delivered through nozzles supplied by a high pressure separate water line, must be formed around the piping. (C) The spray must collide to form a fine aerosol which provides a liquid barrier between workers and the ACM and PACM. (ii) Work practices: (A) The system must be run for at least 10 minutes before removal begins. (B) All removal must take place within the water barrier. (C) The system must be operated by at least three persons, one of whom must not perform removal, but must check equipment, and ensure proper operation of the system. (D) After removal, the ACM and PACM must be bagged while still inside the water barrier. (f) A small walk-in enclosure which accommodates no more than two persons (mini-enclosure) may be used if the disturbance or removal can be completely contained by the enclosure with the following specifications and work practices: (i) Specifications: (A) The fabricated or job-made enclosure must be constructed of 6 mil plastic or equivalent. (B) The enclosure must be placed under negative pressure by means of a HEPA filtered vacuum or similar ventilation unit. (C) Change room. A small change room made of 6-mil-thick polyethylene plastic should be contiguous to the mini-enclosure, and is necessary to allow the worker to vacuum off his/her protective coveralls and remove them before leaving the Part I-1, Page 16 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07712 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite work area. While inside the enclosure, the worker should wear Tyvek disposable coveralls or equivalent and must use the appropriate HEPA-filtered dual cartridge respiratory protection. The advantages of mini-enclosures are that they limit the spread of asbestos contamination, reduce the potential exposure of bystanders and other workers who may be working in adjacent areas, and are quick and easy to install. The disadvantage of mini-enclosures is that they may be too small to contain the equipment necessary to create a negative-pressure within the enclosure; however, the double layer of plastic sheeting will serve to restrict the release of asbestos fibers to the area outside the enclosure. (ii) Work practices: (A) Before use, the mini-enclosure must be inspected for leaks and smoke-tested to detect breaches, and any breaches sealed. (B) Before reuse, the interior must be completely washed with amended water and HEPA-vacuumed. (C) During use, air movement must be directed away from the employee's breathing zone within the mini-enclosure. (8) Alternative control methods for Class I work. Class I work may be performed using a control method which is not referenced in subsection (2)(a) through (3)(e) of this section, or which modifies a control method referenced in subsection (2)(a) through (3)(e) of this section, if the following provisions are complied with: (a) The control method shall enclose, contain or isolate the processes or source of airborne asbestos dust, before it enters the breathing zone of employees. (b) A certified industrial hygienist or licensed professional engineer who is also qualified as a project designer as defined in WAC 296-62-07703, shall evaluate the work area, the projected work practices and the engineering controls and shall certify in writing that the planned control method is adequate to reduce direct and indirect employee exposure to below the PELs under worst-case conditions of use, and that the planned control method will prevent asbestos contamination outside the regulated area, as measured by clearance sampling which meets the requirements of EPA's Asbestos in Schools rule issued under AHERA, or perimeter monitoring which meets the criteria in subsection (6)(b)(ii) of this section. Where the TSI or surfacing material to be removed is 25 linear or 10 square feet or less, the evaluation required in subsection (8)(b) of this section may be performed by a competent person. (c) Before work which involves the removal of more than 25 linear or 10 square feet of thermal system insulation or surfacing material is begun using an alternative method which has been the subject of subsection (2)(a) through (3)(e) of this section required evaluation and certification, the employer shall include a copy of such evaluation and certification with notifications required by WAC 296-65-020, Notification requirements. The submission shall not constitute approval by WISHA. (d) The evaluation of employee exposure required in WAC 296-62-07712(8) must include and be based on sampling and analytical data representing employee exposure during the use of such method under the worst-case conditions and by employees whose training and experiences are equivalent to employees who are to perform the current job. Part I-1, Page 17 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07712 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (9) Work practices and engineering controls for Class II work. (a) All Class II work must be supervised by a competent person as defined in WAC 296-62-07703. (b) For all indoor Class II jobs, where the employer has not produced a negative exposure assessment according to WAC 296-62-07709(3), or where during the job, changed conditions indicate there may be exposure above the PEL or where the employer does not remove the ACM in a substantially intact state, the employer must use one of the following methods to ensure that airborne asbestos does not migrate from the regulated area: (i) Critical barriers must be placed over all openings to the regulated area; or (ii) The employer must use another barrier or isolation method which prevents the migration of airborne asbestos from the regulated area, as verified by perimeter area monitoring or clearance monitoring which meets the criteria set out in subsection (6)(b)(ii) of this section. (c) Impermeable dropcloths must be placed on surfaces beneath all removal activity. (d) All Class II asbestos work must be performed using the work practices and requirements set out above in subsection (2) of this section. (10) Additional controls for Class II work. Class II asbestos work must also be performed by complying with the work practices and controls designated for each type of asbestos work to be performed, set out in this paragraph. Where more than one control method may be used for a type of asbestos work, the employer may choose one or a combination of designated control methods. Class II work also may be performed using a method allowed for Class I work, except that glove bags and glove boxes are allowed if they fully enclose the Class II material to be removed. (a) For removing vinyl and asphalt flooring materials which contain ACM or for which in buildings constructed no later than 1980, the employer has not verified the absence of ACM according to WAC 296-62-07712 (10)(a)(ix). The employer must ensure that employees comply with the following work practices and that employees are trained in these practices according to WAC 296-62-07722. (i) Flooring or its backing must not be sanded. (ii) Vacuums equipped with HEPA filter, disposable dust bag, and metal floor tool (no brush) must be used to clean floors. (iii) Resilient sheeting must be removed by cutting with wetting of the snip point and wetting during delamination. Rip-up of resilient sheet floor material is prohibited. (iv) All scraping of residual adhesive and/or backing must be performed using wet methods. (v) Dry sweeping is prohibited. (vi) Mechanical chipping is prohibited unless performed in a negative pressure enclosure which meets the requirements of subsection (7)(a) of this section. (vii) Tiles must be removed intact, unless the employer demonstrates that intact removal is not possible. Part I-1, Page 18 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07712 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (viii) When tiles are heated and can be removed intact, wetting may be omitted. (ix) Resilient flooring material including associated mastic and backing must be assumed to be asbestos-containing unless an industrial hygienist determines that it is asbestos-free using recognized analytical techniques. (b) For removing roofing material which contains ACM the employer must ensure that the following work practices are followed: (i) Roofing material must be removed in an intact state to the extent feasible. (ii) Wet methods must be used to remove roofing materials that are not intact, or that will be rendered not intact during removal, unless such wet methods are not feasible or will create safety hazards. (iii) Cutting machines must be continuously misted during use, unless a competent person determines that misting substantially decreases worker safety. (iv) When removing built-up roofs with asbestos-containing roofing felts and an aggregate surface using a power roof cutter, all dust resulting from the cutting operation must be collected by a HEPA dust collector, or must be HEPA vacuumed by vacuuming along the cut line. When removing built-up roofs with asbestos-containing roofing felts and a smooth surface using a power roof cutter, the dust resulting from the cutting operation must be collected either by a HEPA dust collector or HEPA vacuuming along the cut line, or by gently sweeping and then carefully and completely wiping up the still wet dust and debris left along the cut line. The dust and debris must be immediately bagged or placed in covered containers. (v) Asbestos-containing material that has been removed from a roof must not be dropped or thrown to the ground. Unless the material is carried or passed to the ground by hand, it must be lowered to the ground via covered, dust-tight chute, crane or hoist: (A) Any ACM that is not intact must be lowered to the ground as soon as is practicable, but in any event no later than the end of the work shift. While the material remains on the roof it must either be kept wet, placed in an impermeable waste bag, or wrapped in plastic sheeting. (B) Intact ACM must be lowered to the ground as soon as is practicable, but in any event no later than the end of the work shift. (vi) Upon being lowered, unwrapped material must be transferred to a closed receptacle in such manner so as to preclude the dispersion of dust. (vii) Roof level heating and ventilation air intake sources shall be isolated or the ventilation system must be shut down. (viii) Notwithstanding any other provision of this section, removal or repair of sections of intact roofing less than 25 square feet in area does not require use of wet methods or HEPA vacuuming as long as manual methods which do not render the material nonintact are used to remove the material and no visible dust is created by the removal method used. In determining whether a job involves less than 25 square feet, the employer must include all removal and repair work performed on the same roof on the same day. Part I-1, Page 19 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07712 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (c) When removing cementitious asbestos-containing siding and shingles or transite panels containing ACM on building exteriors (other than roofs, where subsection (10)(b) of this section applies) the employer must ensure that the following work practices are followed: (i) Cutting, abrading or breaking siding, shingles, or transite panels, must be prohibited unless the employer can demonstrate that methods less likely to result in asbestos fiber release cannot be used. (ii) Each panel or shingle must be sprayed with amended water prior to removal. (iii) Unwrapped or unbagged panels or shingles must be immediately lowered to the ground via covered dust-tight chute, crane or hoist, or placed in an impervious waste bag or wrapped in plastic sheeting and lowered to the ground no later than the end of the work shift. (iv) Nails must be cut with flat, sharp instruments. (d) When removing gaskets containing ACM, the employer must ensure that the following work practices are followed: (i) If a gasket is visibly deteriorated and unlikely to be removed intact, removal must be undertaken within a glove bag as described in subsection (7)(b) of this section. (ii) (Reserved.) (iii) The gasket must be immediately placed in a disposal container. (iv) Any scraping to remove residue must be performed wet. (e) When performing any other Class II removal of asbestos-containing material for which specific controls have not been listed in subsection (10) of this section, the employer must ensure that the following work practices are complied with. (i) The material must be thoroughly wetted with amended water prior to and during its removal. (ii) The material must be removed in an intact state unless the employer demonstrates that intact removal is not possible. (iii) Cutting, abrading or breaking the material must be prohibited unless the employer can demonstrate that methods less likely to result in asbestos fiber release are not feasible. (iv) Asbestos-containing material removed, must be immediately bagged or wrapped, or kept wet until transferred to a closed receptacle, no later than the end of the work shift. (f) Alternative work practices and controls. Instead of the work practices and controls listed in subsection (10) of this section, the employer may use different or modified engineering and work practice controls if the following provisions are complied with. (i) The employer must demonstrate by data representing employee exposure during the use of such method under conditions which closely resemble the conditions under which the method is to be used, that employee exposure will not exceed the PELs under any anticipated circumstances. Part I-1, Page 20 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07712 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (ii) A competent person must evaluate the work area, the projected work practices and the engineering controls, and must certify in writing, that the different or modified controls are adequate to reduce direct and indirect employee exposure to below the PELs under all expected conditions of use and that the method meets the requirements of this standard. The evaluation must include and be based on data representing employee exposure during the use of such method under conditions which closely resemble the conditions under which the method is to be used for the current job, and by employees whose training and experience are equivalent to employees who are to perform the current job. (11) Work practices and engineering controls for Class III asbestos work. Class III asbestos work must be conducted using engineering and work practice controls which minimize the exposure to employees performing the asbestos work and to bystander employees. (a) The work must be performed using wet methods. (b) To the extent feasible, the work must be performed using local exhaust ventilation. (c) Where the disturbance involves drilling, cutting, abrading, sanding, chipping, braking, or sawing of thermal system insulation or surfacing material, the employer must use impermeable dropcloths, and must isolate the operation using mini-enclosures or glove bag systems according to subsection (7) of this section or another isolation method. (d) Where the employer does not produce a "negative exposure assessment" for a job, or where monitoring results show the PEL has been exceeded, the employer must contain the area using impermeable dropcloths and plastic barriers or their equivalent, or must isolate the operation using a control system listed in and in compliance with subsection (7) of this section. (e) Employees performing Class III jobs, which involve the disturbance of thermal system insulation or surfacing material, or where the employer does not produce a "negative exposure assessment" or where monitoring results show a PEL has been exceeded, must wear respirators which are selected, used and fitted according to provisions of WAC 296-62-07715. (12) Class IV asbestos work. Class IV asbestos jobs must be conducted by employees trained according to the asbestos awareness training program set out in WAC 296-62-07722. In addition, all Class IV jobs must be conducted in conformity with the requirements set out in this section, mandating wet methods, HEPA vacuums, and prompt clean up of debris containing ACM and PACM. (a) Employees cleaning up debris and waste in a regulated area where respirators are required must wear respirators which are selected, used and fitted according to provisions of WAC 296-62 07715. (b) Employers of employees who clean up waste and debris in, and employers in control of, areas where friable thermal system insulation or surfacing material is accessible, must assume that such waste and debris contain asbestos. (13) Alternative methods of compliance for installation, removal, repair, and maintenance of certain roofing and pipeline coating materials. Notwithstanding any other provision of this section, an employer who complies with all provisions of subsection (10)(a) and (b) of this section when installing, removing, repairing, or maintaining intact pipeline asphaltic wrap, or roof flashings which contain asbestos fibers encapsulated or coated by bituminous or resinous compounds will be deemed to be in compliance with this section. If an employer does not comply with all provisions of this subsection (13), or if during the course of the job the material does not remain intact, the provisions of subsection (10) of this section apply instead of this subsection (13). Part I-1, Page 21 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07712 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (a) Before work begins and as needed during the job, a competent person who is capable of identifying asbestos hazards in the workplace and selecting the appropriate control strategy for asbestos exposure, and who has the authority to take prompt corrective measures to eliminate such hazards, must conduct an inspection of the worksite and determine that the roofing material is intact and will likely remain intact. (b) All employees performing work covered by this subsection (13) must be trained in a training program that meets the requirements of WAC 296-62-07722. (c) The material must not be sanded, abraded, or ground. When manual methods are used, materials must stay intact. (d) Material that has been removed from a roof must not be dropped or thrown to the ground. Unless the material is carried or passed to the ground by hand, it must be lowered to the ground via covered, dust-tight chute, crane or hoist. All such material must be removed from the roof as soon as is practicable, but in any event no later than the end of the work shift. (e) Where roofing products which have been labeled as containing asbestos pursuant to WAC 296 62-07721, installed on nonresidential roofs during operations covered by this subsection (13), the employer must notify the building owner of the presence and location of such materials no later than the end of the job. (f) All removal or disturbance of pipeline asphaltic wrap must be performed using wet methods. [Statutory Authority: RCW 49.17.010, .040, .050, and .060. 06-05-027 (Order 05-45), 296-62-07712, filed 02/07/06, effective 04/01/06. Statutory Authority: RCW 49.17.040, .050, RCW 49.26.040 and RCW 49.26.130. 99-17-026 (Order 98-35), 296-62 07712, filed 08/10/99, effective 11/10/99. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-19-014, 296-62 07712, filed 9/5/97, effective 11/5/97; 97-01-079, 296-62-07712, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 89-21-018 (Order 89-10), 296-62-07712, filed 10/10/89, effective 11/24/89; 89-11-035 (Order 89-03), 296-62-07712, filed 5/15/89, effective 6/30/89; 87-24-051 (Order 87-24), 296-62-07712, filed 11/30/87.] WAC 296-62-07713 Methods of compliance for asbestos activities in general industry. (1) Engineering controls and work practices. (a) The employer must institute engineering controls and work practices to reduce and maintain employee exposure to or below the permissible exposure limits prescribed in WAC 296-62 07705, except to the extent that such controls are not feasible. Engineering controls and work practices include but are not limited to the following: (i) Local exhaust ventilation equipped with HEPA filter dust collection systems; (ii) Vacuum cleaners equipped with HEPA filters; (iii) Enclosure or isolation of processes producing asbestos dust; (iv) Use of wet methods, wetting agents, or removal encapsulants to control employee exposures during asbestos handling, mixing, removal, cutting, application, and cleanup; (v) Prompt disposal of wastes contaminated with asbestos in leak-tight containers; or (vi) Use of work practices or other engineering controls that the director can show to be feasible. Part I-1, Page 22 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07713 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (b) Wherever the feasible engineering controls and work practices that can be instituted are not sufficient to reduce employee exposure to or below the permissible exposure limits prescribed in WAC 296-62-07705, the employer must use them to reduce employee exposure to the lowest levels achievable by these controls and must supplement them by the use of respiratory protection that complies with the requirements of WAC 296-62-07715. (c) For the following operations, wherever feasible engineering controls and work practices that can be instituted are not sufficient to reduce the employee exposure to or below the permissible exposure limits prescribed in WAC 296-62-07705, the employer must use them to reduce employee exposure to or below 0.5 fiber per cubic centimeter of air (as an eight-hour timeweighted average) or 2.5 fibers per cubic centimeter of air for 30 minutes (short-term exposure), and must supplement them by the use of any combination of respiratory protection that complies with the requirements of WAC 296-62-07715, work practices and feasible engineering controls that will reduce employee exposure to or below the permissible exposure limits prescribed in WAC 296-62-07705: Coupling cutoff in primary asbestos cement pipe manufacturing; sanding in primary and secondary asbestos cement sheet manufacturing; grinding in primary and secondary friction product manufacturing; carding and spinning in dry textile processes; and grinding and sanding in primary plastics manufacturing. (d) Local exhaust ventilation. Local exhaust HEPA ventilation and dust collection systems must be designed, constructed, installed, and maintained in accordance with good practices such as those found in the American National Standard Fundamentals Governing the Design and Operation of Local Exhaust Systems, ANSI Z9.2-1979. (e) Particular tools. All hand-operated and power-operated tools which would produce or release fibers of asbestos so as to expose employees to levels in excess of the exposure limits prescribed in WAC 296-62-07705, such as, but not limited to, saws, scorers, abrasive wheels, and drills, must be provided with local exhaust ventilation systems which comply with (d) of this subsection. High-speed abrasive disc saws that are not equipped with appropriate engineering controls must not be used for work related to asbestos. (f) Wet methods. Asbestos must be handled, mixed, applied, removed, cut, scored, or otherwise worked in a wet saturated state to prevent the emission of airborne fibers unless the usefulness of the product would be diminished thereby. (g) Particular products and operations. When asbestos cement, mortar, coating, grout, plaster, or similar material containing asbestos is removed from bags, cartons, or other containers in which they are shipped, it must be either wetted, enclosed, or ventilated so as to prevent effectively the release of airborne fibers of asbestos. (h) Compressed air. Compressed air must not be used to remove asbestos or materials containing asbestos unless the compressed air is used in conjunction with an enclosed ventilation system designed to effectively capture the dust cloud created by the compressed air. (2) Compliance program. (a) Where either the time weighted average and/or excursion limit is exceeded, the employer must establish and implement a written program to reduce employee exposure to or below the permissible exposure limits by means of engineering and work practice controls as required by subsection (1) of this section, and by the use of respiratory protection where required or permitted under this section. Part I-1, Page 23 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07713 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (b) Such programs must be reviewed and updated as necessary to reflect significant changes in the status of the employer's compliance program. (c) Written programs must be submitted upon request for examination and copying to the director, affected employees and designated employee representatives. (d) The employer must not use employee rotation as a means of compliance with the permissible exposure limits specified in wAc 296-62-07705. (3) Specific compliance methods for brake and clutch repair: (a) Engineering controls and work practices for brake and clutch repair and service. During automotive brake and clutch inspection, disassembly, repair and assembly operations, the employer must institute engineering controls and work practices to reduce employee exposure to materials containing asbestos using a negative pressure enclosure/HEPA vacuum system method or low pressure/wet cleaning method which meets the detailed requirements in WAC 296-62 07745, Appendix F. The employer may also comply using an equivalent method which follows written procedures which the employer demonstrates can achieve results equivalent to Method (1) Negative pressure enclosure/HEPA vacuum system method in WAC 296-62-07745, Appendix F. For facilities in which no more than 5 pair of brakes or 5 clutches are inspected, disassembled, repaired, or assembled per week, (4) Wet method in WAC 296-62-07745, Appendix F may be used instead of Method (1). (b) The employer may also comply by using an equivalent method which follows written procedures, which the employer demonstrates can achieve equivalent exposure reductions as do the two "preferred methods." Such demonstration must include monitoring data conducted under workplace conditions closely resembling the process, type of asbestos containing materials, control method, work practices and environmental conditions which the equivalent method will be used, or objective data, which document that under all reasonably foreseeable conditions of brake and clutch repair applications, the method results in exposure which are equivalent to the methods in WAC 296-62-07745, Appendix F. [Statutory Authority: RCW 49.17.010, .040, .050 and RCW 49.26.130. 00-06-075 (Order 99-40), 296-62-07713, filed 03/01/00, effective 04/10/00. Statutory Authority: RCW 49.17.040, .050, RCW 49.26.040 and RCW 49.26.130. 99-17-026 (Order 98-35), 296-62-07713, filed 08/10/99, effective 11/10/99. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07713, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 90-17-051 (Order 90-10), 296-62-07713, filed 8/13/90, effective 9/24/90; 89-11-035 (Order 89-03), 296-62-07713, filed 5/15/89, effective 6/30/89; 87-24-051 (Order 87-24), 296-62-07713, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62-07713, filed 4/27/87.] WAC 296-62-07715 Respiratory protection. (1) General. For employees who use respirators as required by WAC 296-62-077 through 296-62-07747, the employer must provide respirators that comply with the requirements of this section. Respirators must be used during: (a) Periods necessary to install or implement feasible engineering and work-practice controls; (b) Work operations, such as maintenance and repair activities, for which engineering and workpractice controls are not feasible; (c) Work operations for which feasible engineering and work-practice controls are not yet sufficient to reduce employee exposure to or below the permissible exposure limits; Part I-1, Page 24 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07715 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (d) Emergencies; (e) Work operations in all regulated areas, except for construction activities which follow requirements set forth in WAC 296-62-07715 (1)(g); (f) Work operations whenever employee exposure exceeds the permissible exposure limits; (g) The following construction activities: (i) Class I asbestos work; (ii) Class II work where the ACM is not removed in a substantially intact state; (iii) Class II and Class III work which is not performed using wet methods, except for removal of ACM from sloped roofs when a negative-exposure assessment has been made and the ACM is removed in an intact state; (iv) Class II and Class III asbestos work for which a negative-exposure assessment has not been conducted; (v) Class III work when TSI or surfacing ACM or PACM is being disturbed; (vi) Class IV work performed within regulated areas where employees who are performing other work are required to wear respirators. (2) Respirator program. (a) The employer must develop, implement and maintain a respiratory protection program as required by chapter 296-842 WAC, Respirators. (b) Employers must provide an employee with a tight-fitting, powered, air-purifying respirator (PAPR) instead of a negative-pressure respirator selected when an employee chooses to use a PAPR and the respirator provides the required protection to the employee. (c) The employer must inform any employee required to wear a respirator under this section that the employee may require the employer to provide a tight-fitting, powered, air-purifying respirator (PAPR) instead of a negative-pressure respirator. (d) No employee must be assigned to tasks requiring the use of respirators if, based on their most recent medical examination, the examining physician determines that the employee will be unable to function normally using a respirator, or that the safety or health of the employee or other employees will be impaired by the use of a respirator. Such employees must be assigned to another job or given the opportunity to transfer to a different position, the duties of which they can perform. If such a transfer position is available, the position must be with the same employer, in the same geographical area, and with the same seniority, status, and rate of pay the employee had just prior to such transfer. (3) Respirator selection. The employer must: (a) Select and provide to employees appropriate respirators as specified in this section and in WAC 296-842-13005 in the respirator rule. Make sure filtering facepiece respirators are not selected or used for protection against asbestos fibers. (b) Provide employees with an air-purifying, half-facepiece respirator, other than a filtering-facepiece respirator, that is equipped with a HEPA filter or an N-, R-, or P-100 series filter whenever the employee performs: Part I-1, Page 25 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite WAC 296-62-07715 (Cont.) (i) Class II and III asbestos work for which no negative-exposure assessment is available; (ii) Class III asbestos work involving disturbances of TSI or surfacing ACM or PACM. (c) Equip any powered air-purifying respirator (PAPR) or negative pressure air-purifying respirator with HEpA filters or N-, R-, or P-100 series filters. (4) Special respiratory protection requirements. (a) Unless specifically identified in this subsection, respirator selection for asbestos removal, demolition, and renovation operations shall be in accordance with the selection specifications of this section and the general selection requirements in WAC 296-842-13005 found in the respirator rule. The employer must provide and require to be worn, at no cost to the employee, a full facepiece supplied-air respirator operated in the pressure demand mode equipped with either an auxiliary positive pressure self-contained breathing apparatus or a HEPA filter egress cartridge, to employees engaged in the following asbestos operations: (i) Inside negative pressure enclosures used for removal, demolition, and renovation of friable asbestos from walls, ceilings, vessels, ventilation ducts, elevator shafts, and other structural members, but does not include pipes or piping systems; or (ii) Any dry removal of asbestos. (b) For all Class I work excluded or not specified in (a)(i) and (ii) of this subsection, when a negativeexposure assessment is not available, and the exposure assessment indicates the exposure level will be at or below 1 f/cc as an 8-hour time weighted average, employers must provide employees with one of the following respirators: (i) A tight-fitting, powered, air-purifying respirator equipped with high-efficiency filters; (ii) A full-facepiece supplied-air respirator operated in the pressure-demand mode equipped with either HEPA egress cartridges; or (iii) An auxiliary positive-pressure, self-contained breathing apparataus. (c) Whenever the employees are in a regulated area performing Class I asbestos work for which a negative exposure assessment is not available, and an exposure assessment indicates that the exposure level will be above 1 f/cc as an 8-hour TWA, employers must provide a full-facepiece supplied-air respirator operated in the pressure-demand mode equipped with an auxiliary positivepressure self-contained breathing apparatus. Exception: In lieu of the supplied-air respirator required by subsection (4) of this section, an employer may provide and require to be worn, at no cost to the employee, a full facepiece supplied-air respirator operated in the continuous How mode equipped with either an auxiliarypositive pressure self-contained breathing apparatus or a back-up HEPA filter egress cartridge where daily and historical personal monitoring data indicates the concentration ofasbestos fibers is not reasonably expected to exceed 10 f/cc. The continuous flow respirator shall be operated at a minimum air flow rate ofsix cubic feet per minute at the facepiece using respirable air supplied as required by chapter 296-842 WAC, Respirators. (5) Respirator fit testing. (a) For each employee wearing negative pressure respirators, employers shall perform either quantitative or qualitative face fit tests at the time of initial fitting and at least annually thereafter. The qualitative fit tests may be used only for testing the fit of half-mask respirators where they are permitted to be worn. Part I-1, Page 26 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07715 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (b) Any supplied-air respirator facepiece equipped with a back-up HEPA filter egress cartridge shall be quantitatively fit tested (see WaC 296-62-07160 through 296-62-07162 and 296-62-07201 through 296-62-07248). [Statutory Authority: RCW 49.17.010, .040, .050, and .060. 07-05-072 (Order 06-39), 296-62-07715, filed 02/20/07, effective 04/01/07. Statutory Authority: RCW 49.17.010, .040, .050. 99-10 (Order 98-10) 296-62-07715, filed 05/04/99, effective 09/01/99.] Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-19-014, 296-62-07715, filed 9/5/97, effective 11/5/97; 97-01 079, 296-62-07715, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 91-03-044 (Order 90-18), 296-62 07715, filed 1/10/91, effective 2/12/91; 89-11-035 (Order 89-03), 296-62-07715, filed 5/15/89, effective 6/30/89; 87-24-051 (Order 87-24), 296-62-07715, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62 07715, filed 4/27/87.] WAC 296-62-07717 Protective work clothing and equipment. (1) Provision and use. If an employee is exposed to asbestos above the permissible exposure limits, or where the possibility of eye irritation exists, or for which a required negative exposure assessment is not produced and for any employee performing Class I operations, the employer shall provide at no cost to the employee and require that the employee uses appropriate protective work clothing and equipment such as, but not limited to: (a) Coveralls or similar full-body work clothing; (b) Gloves, head coverings, and foot coverings; and (c) Face shields, vented goggles, or other appropriate protective equipment which complies with WAC 296-800-160. (2) Removal and storage. (a) The employer shall ensure that employees remove work clothing contaminated with asbestos only in change rooms provided in accordance with WAC 296-62-07719(1). (b) The employer shall ensure that no employee takes contaminated work clothing out of the change room, except those employees authorized to do so for the purpose of laundering, maintenance, or disposal. (c) Contaminated clothing. Contaminated clothing shall be transported in sealed impermeable bags, or other closed, impermeable containers, and be labeled in accordance with WAC 296-62-07721. (d) Containers of contaminated protective devices or work clothing which are to be taken out of change rooms or the workplace for cleaning, maintenance, or disposal, shall bear labels in accordance with WAC 296-62-07721(6). (3) Cleaning and replacement. (a) The employer shall clean, launder, repair, or replace protective clothing and equipment required by this paragraph to maintain their effectiveness. The employer shall provide clean protective clothing and equipment at least weekly to each affected employee. (b) The employer shall prohibit the removal of asbestos from protective clothing and equipment by blowing or shaking. (c) Laundering of contaminated clothing shall be done so as to prevent the release of airborne fibers of asbestos in excess of the permissible exposure limits prescribed in WAC 296-62-07705. Part I-1, Page 27 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (d) Any employer who gives contaminated clothing to another person for laundering shall inform such person of the requirement in (c) of this subsection to effectively prevent the release of airborne fibers of asbestos in excess of the permissible exposure limits. Part I-1, Page 28 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07717 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (e) The employer shall inform any person who launders or cleans protective clothing or equipment contaminated with asbestos of the potentially harmful effects of exposure to asbestos. (f) Contaminated clothing shall be transported in sealed impermeable bags, or other closed, impermeable containers, and labeled in accordance with WAC 296-62-07721. (4) Inspection of protective clothing for construction and shipyard work. (a) The competent person shall examine worksuits worn by employees at least once per workshift for rips or tears that may occur during performance of work. (b) When rips or tears are detected while an employee is working, rips and tears shall be immediately mended, or the worksuit shall be immediately replaced. [Statutory Authority: RCW 49.17.010, .040, .050. 01-11-038, (Order 99-36), 296-62-07717, filed 05/09/01, effective 09/01/01. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-19-014, 296-62-07717, filed 9/5/97, effective 11/5/97; 97-01 079, 296-62-07717, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 94-15-096 (Order 94-07), 296-62 07717, filed 7/20/94, effective 9/20/94; 89-11-035 (Order 89-03), 296-62-07717, filed 5/15/89, effective 6/30/89; 87-24-051 (Order 87-24), 296-62-07717, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62 07717, filed 4/27/87.] WAC 296-62-07719 Hygiene facilities and practices. (1) Change rooms. (a) Exception: The employer shall provide clean change rooms for employees required to work in regulated areas or required by WAC 296-62-07717(1) to wear protective clothing. In lieu of the change area requirement specified in this subsection, the employer maypermit employees in Class III and Class IV asbestos work, to clean theirprotective clothing with a portable HEPA-equipped vacuum before such employees leave the area where maintenance was performed. (b) The employer shall ensure that change rooms are in accordance with WAC 296-800-230, and are equipped with two separate lockers or storage facilities, so separated as to prevent contamination of the employee's street clothes from his/her protective work clothing and equipment. (2) Showers. (a) The employer shall ensure that employees who work in negative pressure enclosures required by WAC 296-62-07712, or who work in areas where their airborne exposure is above the permissible exposure limits prescribed in WAC 296-62-07705, shower at the end of the work shift. (b) The employer shall provide shower facilities which comply with WAC 296-800-230. (c) The employer shall ensure that employees who are required to shower pursuant to (a) of this subsection do not leave the workplace wearing any clothing or equipment worn during the work shift. (3) Special requirements in addition to the other provisions of WAC 296-62-07719 for construction work defined in WAC 296-155-012 and for all shipyard work defined in WAC 296-304-010. (a) Requirements for employees performing Class I asbestos jobs involving over 25 linear or 10 square feet of TSI or surfacing ACM and PACM. Part I-1, Page 29 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07719 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (i) Decontamination areas: The employer shall establish a decontamination area that is adjacent and connected to the regulated area for the decontamination of such employees. The decontamination area shall consist of an equipment room, shower area, and clean room in series. The employer shall ensure that employees enter and exit the regulated area through the decontamination area. (A) Equipment room. The equipment room shall be supplied with impermeable, labeled bags and containers for the containment and disposal of contaminated protective equipment. (B) Shower area. Shower facilities shall be provided which comply with WAC 296 800-230, unless the employer can demonstrate that they are not feasible. The showers shall be adjacent both to the equipment room and the clean room, unless the employer can demonstrate that this location is not feasible. Where the employer can demonstrate that it is not feasible to locate the shower between the equipment room and the clean room, or where the work is performed outdoors, the employers shall ensure that employees: (I) Remove asbestos contamination from their worksuits in the equipment room using a HEPA vacuum before proceeding to a shower that is not adjacent to the work area; or (II) Remove their contaminated worksuits in the equipment room, then don clean worksuits, and proceed to a shower that is not adjacent to the work area. (C) Clean change room. The clean room shall be equipped with a locker or appropriate storage container for each employee's use. (ii) Decontamination area entry procedures. The employer shall ensure that employees: (A) Enter the decontamination area through the clean room; (B) Remove and deposit street clothing within a locker provided for their use; and (C) Put on protective clothing and respiratory protection before leaving the clean room. (D) Before entering the regulated area, the employer shall ensure that employees pass through the equipment room. (iii) Decontamination area exit procedures. The employer shall ensure that: (A) Before leaving the regulated area, employees shall remove all gross contamination and debris from their protective clothing; (B) Employees shall remove their protective clothing in the equipment room and deposit the clothing in labeled impermeable bags or containers; (C) Employees shall not remove their respirators in the equipment room; (D) Employees shall shower prior to entering the clean room. When taking a shower, employees shall be fully wetted, including the face and hair, prior to removing the respirators; Part I-1, Page 30 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07719 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (E) After showering, employees shall enter the clean room before changing into street clothes. (b) Requirements for Class I work involving less than 25 linear or 10 square feet of TSI or surfacing ACM and PACM, and for Class II and Class III asbestos work operations where exposures exceed a PEL or where there is no negative exposure assessment produced before the operation. (i) The employer shall establish an equipment room or area that is adjacent to the regulated area for the decontamination of employees and their equipment which is contaminated with asbestos which shall consist of an area covered by a impermeable drop cloth on the floor or horizontal working surface. (ii) The area must be of sufficient size as to accommodate cleaning of equipment and removing personal protective equipment without spreading contamination beyond the area (as determined by visible accumulations). (iii) Work clothing must be cleaned with a HEPA vacuum before it is removed. (iv) All equipment and surfaces of containers filled with ACM must be cleaned prior to removing them from the equipment room or area. (v) The employer shall ensure that employees enter and exit the regulated area through the equipment room or area. (c) Requirements for Class IV work. Employers shall ensure that employees performing Class IV work within a regulated area comply with hygiene practice required of employees performing work which has a higher classification within that regulated area. Otherwise employers of employees cleaning up debris and material which is TSI or surfacing ACM or identified as PACM shall provide decontamination facilities for such employees which are required by WAC 296-62 07719 (3)(b). (d) Decontamination area for personnel shall not be used for the transportation of asbestos debris. (e) Waste load-out procedure. The waste load-out area as required by WAC 296-62-07723 shall be used as an area for final preparation and external decontamination of waste containers, as a short term storage area for bagged waste, and as a port for transporting waste. The employer shall ensure waste containers be free of all gross contaminated material before removal from the negative-pressure enclosure. Gross contamination shall be wiped, scraped off, or washed off containers before they are placed into a two chamber air lock which is adjacent to the negativepressure enclosure. In the first chamber, the exterior of the waste container shall be decontaminated or placed within a second waste container, and then it shall be moved into the second chamber of the air lock for temporary storage or transferred outside of the regulated area. The second waste container shall not be reused unless thoroughly decontaminated. (4) Lunchrooms. (a) The employer shall provide lunchroom facilities for employees who work in areas where their airborne exposure is above the time weighted average and/or excursion limit. (b) The employer shall ensure that lunchroom facilities have a positive pressure, filtered air supply, and are readily accessible to employees. (c) The employer shall ensure that employees who work in areas where their airborne exposure is above the time weighted average and/or excursion limit, wash their hands and faces prior to eating, drinking, or smoking. Part I-1, Page 31 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07719 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (d) The employer shall ensure that employees do not enter lunchroom facilities with protective work clothing or equipment unless surface asbestos fibers have been removed from the clothing or equipment by vacuuming or other method that removes dust without causing the asbestos to become airborne. (5) Smoking in work areas. The employer shall ensure that employees do not smoke in work areas where they are occupationally exposed to asbestos because of activities in that work area. [Statutory Authority: RCW 49.17.010, .040, .050, and .060. 03-18-090 (Order 03-15), 296-62-07719, filed 09/02/03, effective 111/01/03. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07719, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 91-03-044 (Order 90-18), 296-62-07719, filed 1/10/91, effective 2/12/91; 89-11 035 (Order 89-03), 296-62-07719, filed 5/15/89, effective 6/30/89; 87-24-051 (Order 87-24), 296-62-07719, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62-07719, filed 4/27/87.] WAC 296-62-07721 Communication of hazards to employees. (1) Communication of hazards to employees. General industry requirements. (a) Introduction. This section applies to the communication of information concerning asbestos hazards in general industry. Asbestos exposure in industry occurs in a wide variety of industrial and commercial settings. Employees who manufacture asbestos-containing products may be exposed to asbestos fibers. Employees who repair and replace automotive brakes and clutches may be exposed to asbestos fibers. In addition, employees engaged in housekeeping activities in industrial facilities with asbestos product manufacturing operations, and in public and commercial buildings with installed asbestos-containing materials may be exposed to asbestos fibers. It should be noted that employees who perform housekeeping activities during and after construction activities are covered by asbestos construction work requirements in WAC 296-62 077. Housekeeping employees, regardless of industry designation, should know whether building components they maintain may expose them to asbestos. Building owners are often the only and/or best source of information concerning the presence of previously installed asbestoscontaining building materials. Therefore they, along with employers of potentially exposed employees, are assigned specific information conveying and retention duties under this section. (b) Installed asbestos-containing material. Employers and building owners are required to treat installed TSI and sprayed-on and troweled-on surfacing materials as ACM for the purposes of this standard. These materials are designated "presumed ACM or PACM," and are defined in WAC 296-62-07703. Asphalt and vinyl flooring installed no later than 1980 also must be treated as asbestos-containing. The employer or building owner may demonstrate that PACM and flooring materials do not contain asbestos by complying with WAC 296-62-07712 (10)(a)(ix). (c) Duties of employers and building and facility owners. (i) Building and facility owners must determine the presence, location, and quantity of ACM and/or PACM at the worksite. Employers and building and facility owners must exercise due diligence in complying with these requirements to inform employers and employees about the presence and location of ACM and PACM. (ii) Before authorizing or allowing any construction, renovation, remodeling, maintenance, repair, or demolition project, an owner or owner's agent must perform, or cause to be performed, a good faith inspection to determine whether materials to be worked on or removed contain asbestos. The inspection must be documented by a written report maintained on file and made available upon request to the director. (A) The good faith inspection must be conducted by an accredited inspector. Part I-1, Page 32 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07721 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (B) Such good faith inspection is not required if the owner or owner's agent is reasonably certain that asbestos will not be disturbed by the project or the owner or owner's agent assumes that the suspect material contains asbestos and handles the material in accordance with WAC 296-62-07701 through 296-62-07753. (iii) The owner or owner's agent must provide, to all contractors submitting a bid to undertake any construction, renovation, remodeling, maintenance, repair, or demolition project, the written statement either of the reasonable certainty of nondisturbance of asbestos or of assumption of the presence of asbestos. Contractors must be provided with the written report before they apply or bid to work. (iv) Any owner or owner's agent who fails to comply with (c)(ii) and (iii) of this subsection must be subject to a mandatory fine of not less than two hundred fifty dollars for each violation. Each day the violation continues must be considered a separate violation. In addition, any construction, renovation, remodeling, maintenance, repair, or demolition which was started without meeting the requirements of this section must be halted immediately and cannot be resumed before meeting such requirements. (v) Building and facility owners must inform employers of employees, and employers must inform employees who will perform housekeeping activities in areas which contain ACM and/or PACM of the presence and location of ACM and/or PACM in such areas which may be contacted during such activities. (vi) Upon written or oral request, building or facility owners must make a copy of the written report required in this section available to the department of labor and industries and the collective bargaining representatives or employee representatives of any employee who may be exposed to any asbestos or asbestos-containing materials. A copy of the written report must be posted conspicuously at the location where employees report to work. (vii) Building and facility owners must maintain records of all information required to be provided according to this section and/or otherwise known to the building owner concerning the presence, location and quantity of ACM and PACM in the building/facility. Such records must be kept for the duration of ownership and must be transferred to successive owners. (2) Communication of hazards to employees. Requirements for construction and shipyard employment activities. (a) Introduction. This section applies to the communication of information concerning asbestos hazards in construction and shipyard employment activities. Most asbestos-related construction and shipyard activities involve previously installed building materials. Building/vessel owners often are the only and/or best sources of information concerning them. Therefore, they, along with employers of potentially exposed employees, are assigned specific information conveying and retention duties under this section. Installed Asbestos Containing Building/Vessel Material: Employers and building/vessel owners must identify TSI and sprayed or troweled on surfacing materials as asbestos-containing unless the employer, by complying with WAC 296-62-07721(3) determines it is not asbestos containing. Asphalt or vinyl flooring/decking material installed in buildings or vessels no later than 1980 must also be considered as asbestos containing unless the employer/owner, according to WAC 296-62-07712 (10)(a)(ix) determines it is not asbestos containing. If the employer or building/vessel owner has actual knowledge or should have known, through the exercise of due diligence, that materials other than TSI and sprayed-on or troweled-on surfacing materials are asbestos containing, they must be treated as such. When communicating information to employees according to this standard, owners and employers must identify "PACM" as ACM. Additional requirements relating to communication of asbestos work on multi-employer worksites are set out in WAC 296-62-07706. Part I-1, Page 33 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07721 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (b) Duties of building/vessel and facility owners. (i) Before work subject to this section is begun, building/vessel and facility owners must identify the presence, location and quantity of ACM, and/or PACM at the work site. All thermal system insulation and sprayed on or troweled on surfacing materials in buildings/vessels or substrates constructed no later than 1980 must be identified as PACM. In addition, resilient flooring/decking material installed no later than 1980 must also be identified as asbestos containing. (ii) Before authorizing or allowing any construction, renovation, remodeling, maintenance, repair, or demolition project, a building/vessel and facility owner or owner's agent must perform, or cause to be performed, a good faith inspection to determine whether materials to be worked on or removed contain asbestos. The inspection must be documented by a written report maintained on file and made available upon request to the director. (A) The good faith inspection must be conducted by an accredited inspector. (B) Such good faith inspection is not required if the building/vessel and facility owner or owner's agent assumes that the suspect material contains asbestos and handles the material in accordance with WAC 296-62-07701 through 296-62 07753 or if the owner or the owner's agent is reasonably certain that asbestos will not be disturbed by the project. (iii) The building/vessel and facility owner or owner's agent must provide, to all contractors submitting a bid to undertake any construction, renovation, remodeling, maintenance, repair, or demolition project, the written statement either of the reasonable certainty of nondisturbance of asbestos or of assumption of the presence of asbestos. Contractors must be provided the written report before they apply or bid on work. (iv) Any building/vessel and facility owner or owners agent who fails to comply with WAC 296-62-07721 (2)(b)(ii) and (iii) must be subject to a mandatory fine of not less than two hundred fifty dollars for each violation. Each day the violation continues must be considered a separate violation. In addition, any construction, renovation, remodeling, maintenance, repair, or demolition which was started without meeting the requirements of this section must be halted immediately and cannot be resumed before meeting such requirements. (v) Upon written or oral request, building/vessel and facility owner or owner's agent must make a copy of the written report required in this section available to the department of labor and industries and the collective bargaining representatives or employee representatives of any employee who may be exposed to any asbestos or asbestoscontaining materials. A copy of the written report must be posted conspicuously at the location where employees report to work. (vi) Building/vessel and facility owner or owner's agent must notify in writing the following persons of the presence, location and quantity of ACM or PACM, at work sites in their buildings/facilities/vessels. (A) Prospective employers applying or bidding for work whose employees reasonably can be expected to work in or adjacent to areas containing such material; (B) Employees of the owner who will work in or adjacent to areas containing such material; Part I-1, Page 34 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07721 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (C) On multi-employer worksites, all employers of employees who will be performing work within or adjacent to areas containing such materials; (D) Tenants who will occupy areas containing such materials. (c) Duties of employers whose employees perform work subject to this standard in or adjacent to areas containing ACM and PACM. Building/vessel and facility owner or owner's agents whose employees perform such work must comply with these provisions to the extent applicable. (i) Before work subject to this standard is begun, building/vessel and facility owner or owner's agents must determine the presence, location, and quantity of ACM and/or PACM at the work site according to WAC 296-62-07721 (2)(b). (ii) Before work under this standard is performed employers of employees who will perform such work must inform the following persons of the location and quantity of ACM and/or PACM present at the work site and the precautions to be taken to insure that airborne asbestos is confined to the area. (A) Owners of the building/vessel or facility; (B) Employees who will perform such work and employers of employees who work and/or will be working in adjacent areas; (iii) Upon written or oral request, a copy of the written report required in this section must be made available to the department of labor and industries and the collective bargaining representatives or employee representatives of any employee who may be exposed to any asbestos or asbestos-containing materials. A copy of the written report must be posted conspicuously at the location where employees report to work. (iv) Within 10 days of the completion of such work, the employer whose employees have performed work subject to this standard, must inform the building/vessel or facility owner and employers of employees who will be working in the area of the current location and quantity of PACM and/or ACM remaining in the former regulated area and final monitoring results, if any. (d) In addition to the above requirements, all employers who discover ACM and/or PACM on a work site must convey information concerning the presence, location and quantity of such newly discovered ACM and/or PACM to the owner and to other employers of employees working at the work site, within 24 hours of the discovery. (e) No contractor may commence any construction, renovation, remodeling, maintenance, repair, or demolition project without receiving a copy of the written response or statement required by WAC 296-62-07721 (2)(b). Any contractor who begins any project without the copy of the written report or statement will be subject to a mandatory fine of not less than two hundred fifty dollars per day. Each day the violation continues will be considered a separate violation. (3) Criteria to rebut the designation of installed material as PACM. (a) At any time, an employer and/or building/vessel owner may demonstrate, for purposes of this standard, that PACM does not contain asbestos. Building/vessel owners and/or employers are not required to communicate information about the presence of building material for which such a demonstration according to the requirements of (b) of this subsection has been made. However, in all such cases, the information, data and analysis supporting the determination that PACM does not contain asbestos, must be retained according to WAC 296-62-07727. Part I-1, Page 35 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07721 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (b) An employer or owner may demonstrate that PACM does not contain asbestos by the following: (i) Having a completed inspection conducted according to the requirements of AHERA (40 CFR Part 763, Subpart E) which demonstrates that the material is not ACM; (ii) Performing tests of the material containing PACM which demonstrate that no asbestos is present in the material. Such tests must include analysis of bulk samples collected in the manner described in 40 CFR 763.86, Asbestos-containing materials in schools. The tests, evaluation and sample collection must be conducted by an accredited inspector. Analysis of samples must be performed by persons or laboratories with proficiency demonstrated by current successful participation in a nationally recognized testing program such as the National Voluntary Laboratory Accreditation Program (NVLAP) of the National Institute for Standards and Technology (NIST) or the Round Robin for bulk samples administered by the American Industrial Hygiene Associate (AIHA), or an equivalent nationally recognized Round Robin testing program. (4) At the entrance to mechanical rooms/areas in which employees reasonably can be expected to enter and which contain TSI or surfacing ACM and PACM, the building/vessel and facility owner or owner's agent must post signs which identify the material which is present, its location, and appropriate work practices which, if followed, will ensure that ACM and/or PACM will not be disturbed. The employer shall ensure, to the extent feasible, that employees who come in contact with these signs can comprehend them. Means to ensure employee comprehension may include the use of foreign languages, pictographs, graphics, and awareness training. (5) Warning signs. (a) Warning signs that demarcate the regulated area must be provided and displayed at each location where a regulated area is required. In addition, warning signs must be posted at all approaches to regulated areas and be posted at such a distance from such a location that an employee may read the signs and take necessary protective steps before entering the area marked by the signs. (b) The warning signs required by (a) of this subsection must bear the following information: DANGER ASBESTOS CANCER AND LUNG DISEASE HAZARD AUTHORIZED PERSONNEL ONLY RESPIRATORS AND PROTECTIVE CLOTHING ARE REQUIRED IN THIS AREA (c) The employer shall ensure that employees working in and contiguous to regulated areas comprehend the warning signs required to be posted by (a) of this subsection. Means to ensure employee comprehension may include the use of foreign languages, pictographs, and graphics. (6) Warning labels. (a) Warning labels must be affixed to all products containing asbestos including raw materials, mixtures, scrap, waste, debris, and other products containing asbestos fibers, and to their containers including waste containers. Installed asbestos products must contain a visible label, except where such a label would clearly not be feasible. (b) Labels must be printed in large, bold letters on a contrasting background. (c) The labels must comply with the requirements of WAC 296-800-170, and must include the following information: Part I-1, Page 36 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07721 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite DANGER CONTAINS ASBESTOS FIBERS AVOID CREATING DUST CANCER AND LUNG DISEASE HAZARD AVOID BREATHING AIRBORNE ASBESTOS FIBERS (7) The provisions for labels required by subsection (6)(a) of this section or for material safety data sheets required by subsection (8) of this section do not apply where: (a) Asbestos fibers have been modified by a bonding agent, coating, binder, or other material, provided that the manufacturer can demonstrate that during any reasonably foreseeable use, handling, storage, disposal, processing, or transportation, no airborne concentrations of fibers of asbestos in excess of the excursion limit will be released; or (b) Asbestos is present in a product in concentrations less than 1.0 percent by weight. (8) Material safety data sheets. Employers who are manufacturers or importers of asbestos, or asbestos products must comply with the requirements regarding development of material safety data sheets as specified in WAC 296-62-05413, except as provided by subsection (7) of this section. (9) When a building/vessel owner/or employer identifies previously installed PACM and/or ACM, labels or signs must be affixed or posted so that employees will be notified of what materials contain PACM and/or ACM. The employer must attach such labels in areas where they will clearly be noticed by employees who are likely to be exposed, such as at the entrance to mechanical rooms/areas. Signs required by subsection (5)(a) of this section may be posted in lieu of labels so long as they contain information required for labeling. The employer must ensure, to the extent feasible, that employees who come in contact with these signs can comprehend them. Means to ensure employee comprehension may include the use of foreign languages, pictographs, graphics, and awareness training. [Statutory Authority: RCW 49.17.010, .040, .050. 01-11-038, (Order 99-36), 296-62-07721, filed 05/09/01, effective 09/01/01. Statutory Authority: RCW 49.17.040, .050, RCW 49.26.040 and RCW 49.26.130. 99-17-026 (Order 98-35), 296-62-07721, filed 08/10/99, effective 11/10/99. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-19-014, 296-62-07721, filed 9/5/97, effective 11/5/97; 97-01-079, 296-62-07721, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 93 01-005 (Order 92-20), 296-62-07721, filed 12/2/92, effective 1/15/93; 91-03-044 (Order 90-18), 296-62-07721, filed 1/10/91, effective 2/12/91; 89-21-018 (Order 89-10), 296-62-07721, filed 10/10/89, effective 11/24/89; 89-11-035 (Order 89-03), 296-62 07721, filed 5/15/89, effective 6/30/89; 87-24-051 (Order 87-24), 96-62-07721, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62-07721, filed 4/27/87.] WAC 296-62-07722 Employee information and training. (1) Certification. (a) Only certified asbestos workers may work on an asbestos project as required in WAC 296-65-010 and 296-65-030. (b) Only certified asbestos supervisors may supervise asbestos abatement projects as required in WAC 296-65-012 and 296-65-030. (c) In cases where certification requirements of chapter 296-65 WAC do not apply, all employees must be trained according to the provisions of this section regardless of their exposure levels. (d) Certification is not required for asbestos work on materials containing less than one percent asbestos. (2) Training must be provided prior to or at the time of initial assignment, unless the employee has received equivalent training within the previous twelve months, and at least annually thereafter. Part I-1, Page 37 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07722 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (3) Asbestos projects. (a) Class I work must be considered an asbestos project. Only certified asbestos workers may do this work. (b) Only certified workers may conduct Class II asbestos work that is considered an asbestos project. (i) The following Class II asbestos work must be considered asbestos projects: (A) All Class II asbestos work where critical barriers, equivalent isolation methods, or negative pressure enclosures are required; or (B) All Class II asbestos work where asbestos containing materials do not stay intact (including removal of vinyl asbestos floor (VAT) or roofing materials by mechanical methods such as chipping, grinding, or sanding). (ii) The following Class II asbestos work is not considered an asbestos project and is excluded from asbestos worker certification: (A) All Class II asbestos work involving intact asbestos containing materials (for example, intact roofing materials, bituminous or asphalt pipeline coatings, and intact flooring/decking materials); (B) All Class II asbestos work of less than one square foot of asbestos containing materials; or (C) All Class II asbestos work involving asbestos-cement water pipe when the work is done in accordance with training approved by the department through the asbestos certification program (see WAC 296-65-015(4)). (iii) Asbestos work involving the removal of one square foot or more of intact roofing materials by mechanical sawing or heavy equipment must meet the following requirements: (A) Only certified asbestos workers may conduct mechanical sawing of intact roofing material; (B) Noncertified asbestos workers may handle roofing dust, material and debris; (C) Operators of heavy equipment (such as track hoes with clam shells and excavators) do not need to be certified asbestos workers in the removal or demolition of intact roofing materials. (c) Only certified asbestos workers may conduct all Class III and Class IV asbestos work that is considered an asbestos project. (i) The following asbestos work is considered an asbestos project: (A) All Class III asbestos work where one square foot or more of asbestos containing materials that do not stay intact; (B) All Class IV asbestos work where one square foot or more of asbestos containing materials that do not stay intact; or Part I-1, Page 38 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07722 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (C) All Class III and Class IV asbestos work with pipe insulation. (ii) Except for a project involving pipe insulation work, any project involving only Class III or Class IV asbestos work with less than one square foot of asbestos containing materials is not considered an asbestos project. (4) Training requirements for asbestos work that is not considered an asbestos project or is excluded from asbestos worker certification. (a) Class II asbestos work. (i) Employers must provide eight-hours of training to employees who perform asbestos work on one generic category of asbestos containing materials (ACM). When performing asbestos work in more than one category of asbestos containing materials, additional training must be used to supplement the first eight hour training course. (ii) The training course must include: Hands-on training that applies to the category of asbestos containing materials, Specific work practices and engineering controls related to the category of asbestos containing materials present as specified in WAC 296-62-07712, and All the minimum elements of subsection (5) of this section. (b) Class III asbestos work (maintenance and custodial work in buildings containing asbestos containing materials). (i) Employers must provide training with curriculum and training methods equivalent to the 16-hour operations and maintenance course developed by the EPA. (See 40 CFR 763.92(a)(2).) For those employees whose only affected work is Class II work as described in subsection (4)(a)(i) of this section, employers must meet this 16-hour training requirement or provide training that meets the eight hours Class II requirements in subsection (4)(a) of this section. (ii) Sixteen hours of training must include: Hands-on training in the use of respiratory protection and work practices, and All the minimum elements of subsection (5) of this section. (c) Class IV asbestos work (maintenance and custodial work in buildings containing asbestoscontaining materials). (i) Employers must provide at least two hours of training with curriculum and training methods equivalent to the awareness training course developed by the EPA. (ii) Training must include: Available information concerning the location of PACM, ACM, asbestoscontaining flooring materials or flooring materials where the absence of asbestos has not been certified, Instruction on how to recognize damaged, deteriorated, and delimitation of asbestos containing building materials, and All of the minimum elements of subsection (5) of this section. Part I-1, Page 39 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07722 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (5) The training program must be conducted in a manner which the employee is able to understand. The employer must ensure that each employee is informed of the following: (a) The health effects associated with asbestos exposure; (b) The relationship between smoking and exposure to asbestos producing lung cancer; (c) Methods of recognizing asbestos and quantity, location, manner of use, release (including the requirements of WAC 296-62-07721 (1)(c) and (2)(b) to presume certain building materials contain asbestos), and storage of asbestos and the specific nature of operations which could result in exposure to asbestos; (d) The engineering controls and work practices associated with the employee's job assignment; (e) The specific procedures implemented to protect employees from exposure to asbestos, such as appropriate work practices, housekeeping procedures, hygiene facilities, decontamination procedures, emergency and clean-up procedures (including where Class III and IV work is performed, the contents "Managing Asbestos In Place" (EPA 20T-2003, July 1990) or its equivalent in content), personal protective equipment to be used, waste disposal procedures, and any necessary instructions in the use of these controls and procedures; (f) The purpose, proper use, and limitations of protective clothing; (g) The purpose and a description of the medical surveillance program required by WAC 296-62 07725; (h) The content of this standard, including appendices; (i) The names, addresses and phone numbers of public health organizations which provide information, materials, and/or conduct programs concerning smoking cessation. The employer may distribute the list of such organizations contained in Appendix I, to comply with this requirement; (j) The requirements for posting signs and affixing labels and the meaning of the required legends for such signs and labels; and (k) The purpose, proper use, limitations, and other training requirements for respiratory protection as required by chapter 296-842 WAC, (see WAC 296-842-11005, 296-842-16005, and 296-842 19005. (6) The employer must also provide, at no cost to employees who perform housekeeping operations in a facility which contains ACM or PACM, an asbestos awareness training course to all employees who are or will work in areas where ACM and/or PACM is present who work in buildings containing asbestoscontaining materials, which must, at a minimum, contain the following elements: Health effects of asbestos, Locations of ACM and PACM in the building/facility, Recognition of ACM and PACM damage and deterioration, Requirements in this standard relating to housekeeping, and Proper response to fiber release episodes. Each such employee must be so trained at least once a year. Part I-1, Page 40 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07722 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (7) Access to information and training materials. (a) The employer must make a copy of this standard and its appendices readily available without cost to all affected employees. (b) The employer must provide, upon request, all materials relating to the employee information and training program to the director. (c) The employer must inform all employees concerning the availability of self-help smoking cessation program material. Upon employee request, the employer must distribute such material, consisting of NIH Publication No. 89-1647, or equivalent self-help material, which is approved or published by a public health organization listed in Appendix I, WAC 296-62-07751. [Statutory Authority: RCW 49.17.010, .040, .050, and .060. 05-03-093 (Order 04-41), 296-62-07722, filed 01/18/05, effective 03/01/05. Statutory Authority: RCW 49.17.010, .040, .050 and RCW 49.26.130. 00-06-075 (Order 99-40), 296-62-07722, filed 03/01/00, effective 04/10/00. Statutory Authority: RCW 49.17.040, .050, RCW 49.26.040 and RCW 49.26.130. 99-17-026 (Order 98-35), 296-62-07722, filed 08/10/99, effective 11/10/99. Statutory Authority: RCW 49.17.010, .040, .050. 99-10 (Order 98-10) 296-62-07222, filed 05/04/99, effective 09/01/99.] Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07722, filed 12/17/96, effective 3/1/97.] WAC 296-62-07723 Housekeeping. (1) All surfaces shall be maintained as free as practicable of accumulations of dusts and waste containing asbestos. (2) All spills and sudden releases of material containing asbestos shall be cleaned up as soon as possible. (3) Surfaces contaminated with asbestos may not be cleaned by the use of compressed air. (4) Vacuuming. HEPA-filtered vacuuming equipment shall be used for vacuuming. The equipment shall be used and emptied in a manner which minimizes the reentry of asbestos into the workplace. (5) Shoveling, dry sweeping, and dry clean-up of asbestos may be used only where vacuuming and/or wet cleaning are not feasible. (6) Waste disposal. Waste, scrap, debris, bags, containers, equipment, and clothing contaminated with asbestos consigned for disposal, shall be collected and disposed of in sealed impermeable bags, or other closed, impermeable containers. To avoid breakage, bags shall be at least six mils in thickness and shall not be dragged or slid across rough or abrasive surfaces. (7) Waste removal. Whenever a negative-pressure enclosure is required by WAC 296-62-07712, the employer wherever feasible, shall establish a waste-load-out area that is adjacent and connected to the negative-pressure enclosure, constructed of a two chamber air lock, for the decontamination and removal of asbestos debris. (8) Deterioration. Asbestos and asbestos containing material which has become damaged or deteriorated shall be repaired, enclosed, encapsulated, or removed. (9) Care of asbestos-containing flooring/decking material. (a) Sanding of asbestos-containing floor/deck material is prohibited. (b) Stripping of finishes shall be conducted using low abrasion pads at speeds lower than 300 rpm and wet methods. Part I-1, Page 41 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07723 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (c) Burnishing or dry buffing may be performed only on asbestos-containing flooring/decking which has sufficient finish so that the pad cannot contact the asbestos-containing material. (d) Dust and debris in an area containing TSI or surfacing ACM/PACM or visibly deteriorated ACM, shall not be dusted or swept dry, or vacuumed without using a HEPA filter. (10) Waste and debris and accompanying dust in an area containing accessible thermal system insulation or surfacing material or visibly deteriorated ACM: (a) Shall not be dusted or swept dry, or vacuumed without using a HEPA filter; (b) Shall be promptly cleaned up and disposed of in leak tight containers. [Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07723, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 87-24-051 (Order 87-24), 296-62-07723, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62-07723, filed 4/27/87.] WAC 296-62-07725 Medical surveillance. (1) General. (a) Employees covered. The employer shall institute a medical surveillance program for all employees who are or will be exposed to airborne concentrations of fibers of asbestos at or above the permissible exposure limits. Exception. Employers in the construction or shipyard industries shall institute a medical surveillance program for all employees who for a combined total of 30 or more days per year are engaged in Class I, II, and III work, or are exposed at or above the permissible exposure limit for combined 30 days or more per year; or who are required by the standard to wear negative pressure respirators. For the purpose of this subsection, any day in which an employee engaged in Class II or III work or a combination thereof for one hour or less (taking into account the entire time spent on the removal operation, including cleanup), and, while doing so adheres to the work practices specified in this standard, shall not be counted. (b) Examination by a physician. (i) The employer shall ensure that all medical examinations and procedures are performed by or under the supervision of a licensed physician, and shall be provided without cost to the employee and at a reasonable time and place. (ii) Persons other than licensed physicians, who administer the pulmonary function testing required by this section, shall complete a training course in spirometry sponsored by an appropriate academic or professional institution. (2) Preplacement examinations. (a) Except as provided by WAC 296-62-07725 (1)(a), before an employee is assigned to an occupation exposed to airborne concentrations of asbestos, a preplacement medical examination shall be provided or made available by the employer. Examinations administered using the thirty or more days per year criteria of WAC 296-62-07725 (1)(a) shall be given within ten working days following the thirtieth day of exposure. Examinations must be given prior to assignment of employees to areas where negative-pressure respirators are worn. Part I-1, Page 42 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07725 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (b) All examinations shall include, as a minimum, a medical and work history: A complete physical examination of all systems with special emphasis on the pulmonary, cardiovascular, and gastrointestinal systems; completion of the respiratory disease standardized questionnaire in WAC 296-62-07741, Appendix D, Part 1; a chest roentgenogram (posterior-anterior 14x17 inches); pulmonary function tests to include forced vital capacity (FVC) and forced expiratory volume at 1 second (FEV1.0); and any additional tests deemed appropriate by the examining physician. Interpretation and classification of chest roentgenograms shall be conducted in accordance with WAC 296-62-07743, Appendix E. (3) Periodic examinations. (a) Periodic medical examinations shall be made available annually. (b) The scope of the medical examination shall be in conformance with the protocol established in subsection (2)(b) of this section, except that the frequency of chest roentgenograms shall be conducted in accordance with Table 2 of this section, and the abbreviated standardized questionnaire contained in WAC 296-62-07741, Appendix D, Part 2, shall be administered to the employee. TABLE 2--FREQUENCY OF CHEST ROENTGENOGRAMS Year since first exposure Age of employee 15 to 35 35+ to 45 45+ 0 to 10 Every 5 years Every 5 years Every 5 years 10+ Every 5 years Every 2 years Every 1 year (c) If the examining physician determines that any of the examinations should be provided more frequently than specified, the employer shall provide such examinations to affected employees at the frequencies specified by the physician. (4) Termination of employment examinations. (a) The employer shall provide, or make available, a termination of employment medical examination for any employee who has been exposed to airborne concentrations of fibers of asbestos at or above the permissible exposure limits. (b) The medical examination shall be in accordance with the requirements of the periodic examinations stipulated in subsection (3) of this section, and shall be given within thirty calendar days before or after the date of termination of employment. (5) Recent examinations. No medical examination is required of any employee, if adequate records show that the employee has been examined in accordance with subsection (2), (3), or (4) of this section within the past one-year period. (6) Information provided to the physician. The employer shall provide the following information to the examining physician: (a) A copy of this standard and Appendices D, E, and H of WAC 296-62-07741, 296-62-07743, and 296-62-07749 respectively. (b) A description of the affected employee's duties as they relate to the employee's exposure. (c) The employee's representative exposure level or anticipated exposure level. (d) A description of any personal protective and respiratory equipment used or to be used. Part I-1, Page 43 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07725 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (e) Information from previous medical examinations of the affected employee that is not otherwise available to the examining physician. (7) Physician's written opinion. (a) The employer shall obtain a written opinion from the examining physician. This written opinion shall contain the results of the medical examination and shall include: (i) The physician's opinion as to whether the employee has any detected medical conditions that would place the employee at an increased risk of material health impairment from exposure to asbestos; (ii) Any recommended limitations on the employee or upon the use of personal protective equipment such as clothing or respirators; (iii) A statement that the employee has been informed by the physician of the results of the medical examination and of any medical conditions resulting from asbestos exposure that require further explanation or treatment; and (iv) A statement that the employee has been informed by the physician of the increased risk of lung cancer attributable to the combined effect of smoking and asbestos exposure. (b) The employer shall instruct the physician not to reveal in the written opinion given to the employer specific findings or diagnoses unrelated to occupational exposure to asbestos. (c) The employer shall provide a copy of the physician's written opinion to the affected employee within thirty days from its receipt. [Statutory Authority: RCW 49.17.010, .040, .050, and .060. 06-05-027 (Order 05-45), 296-62-07725, filed 02/07/06, effective 04/01/06. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-19-014, 296-62-07725, filed 9/5/97, effective 11/5/97; 97-01-079, 296-62-07725, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 91-03-044 (Order 90 18), 296-62-07725, filed 1/10/91, effective 2/12/91; 89-11-035 (Order 89-03), 296-62-07725, filed 5/15/89, effective 6/30/89; 87-24 051 (Order 87-24), 296-62-07725, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62-07725, filed 4/27/87.] WAC 296-62-07727 Recordkeeping. (1) Exposure measurements. (a) The employer shall keep an accurate record of all measurements taken to monitor employee exposure to asbestos as prescribed in WAC 296-62-07709. (b) This record shall include at least the following information: (i) Name of employer; (ii) Name of person conducting monitoring; (iii) The date of measurement; (iv) Address of operation or activity; (v) Description of the operation or activity involving exposure to asbestos that is being monitored; (vi) Personal or area sample; (vii) Name, Social Security number, and exposure level of the employees whose exposures are represented; Part I-1, Page 44 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07727 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (viii) Type of protective devices worn, if any; (ix) Pump calibration date and flow rate; (x) Total volume of air sampled; (xi) Name and address of analytical laboratory; (xii) Number, duration, and results (f/cc) of samples taken; (xiii) Date of analysis; and (xiv) Sampling and analytical methods used and evidence of their accuracy. (c) The employer shall maintain this record for the duration of employment plus thirty years, in accordance with chapter 296-802 WAC. (2) Objective data for exempted operations. (a) Where the processing, use, or handling of products made from or containing asbestos is exempted from other requirements of this section under WAC 296-62-07709 (2)(a)(iii) and (3)(b)(i), the employer shall establish and maintain an accurate record of objective data reasonably relied upon in support of the exemption. (b) The record shall include at least the following: (i) The product qualifying for exemption; (ii) The source of the objective data; (iii) The testing protocol, results of testing, and/or analysis of the material for the release of asbestos; (iv) A description of the operation exempted and how the data support the exemption; and (v) Other data relevant to the operations, materials, processing, or employee exposures covered by the exemption. (c) The employer shall maintain this record for the duration of the employer's reliance upon such objective data. Note: The employer may utilize the services of competent organizations such as industry trade associations and employee associations to maintain the records required by this section. (3) Medical surveillance. (a) The employer shall establish and maintain an accurate record for each employee subject to medical surveillance by WAC 296-62-07725 (1)(a), in accordance with chapter 296-802 WAC. (b) The record shall include at least the following information: (i) The name and Social Security number of the employee; (ii) Physician's written opinions; Part I-1, Page 45 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07727 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (iii) Any employee medical complaints related to exposure to asbestos; (iv) A copy of the information provided to the physician as required by WAC 296-6207725(6); and (v) A copy of the employee's medical examination results, including the medical history, questionnaire responses, results of any tests, and physicians recommendations. (c) The employer shall ensure that this record is maintained for the duration of employment plus thirty years, in accordance with chapter 296-802 WAC. (4) Training. The employer shall maintain all employee training records for one year beyond the last date of employment of that employee. (5) Availability. (a) The employer, upon written request, shall make all records required to be maintained by this section available to the director for examination and copying. (b) The employer, upon request, shall make any exposure records required by subsection (1) of this section available for examination and copying to affected employees, former employees, designated representatives, and the director, in accordance with chapter 296-802 WAC. (c) The employer, upon request, shall make employee medical records required by subsection (2) of this section available for examination and copying to the subject employee, to anyone having the specific written consent of the subject employee, and the director, in accordance with chapter 296 802 WAC. (6) Transfer of records. (a) The employer shall comply with the requirements concerning transfer of records set forth in chapter 296-802 WAC. (b) Whenever the employer ceases to do business and there is no successor employer to receive and retain the records for the prescribed period, the employer shall notify the director at least ninety days prior to disposal of records and, upon request, transmit them to the director. (7) Data to rebut PACM. Where the building owner and employer have relied on data to demonstrate that PACM is not asbestos-containing, such data shall be maintained for as long as they are relied upon to rebut the presumption. (8) Records of required notifications. Where the building owner has communicated and received information concerning the identification, location and quantity of ACM and PACM, written records of such notifications and their content shall be maintained by the building owner for the duration of ownership and shall be transferred to successive owners of such buildings/facilities. [Statutory Authority: RCW 49.17.010, .040, .050, and .060. 04-10-026 (Order 03-04) 296-62-07727, filed 04/27/04, effective 08/01/04. Statutory Authority: RCW 49.17.010, .040, .050 and RCW 49.26.130. 00-06-075 (Order 99-40), 296-62-07727, filed 03/01/00, effective 04/10/00. Statutory Authority: Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07727, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 87-24-051 (Order 87-24), 296-62-07727, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62-07727, filed 4/27/87.] Part I-1, Page 46 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07728 Competent person. Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (1) General. For all construction and shipyard work covered by this standard, the employer must designate a competent person, having the qualifications and authorities for ensuring worker safety and health as required by chapter 296-155 WAC. (2) Required inspections by the competent person. WAC 296-155-110(9) which requires health and safety prevention programs to provide for frequent and regular inspections on the job sites, materials, and equipment to be made by the competent person, is incorporated. (3) Additional inspections. In addition, the competent person must make frequent and regular inspections of the job sites in order to perform the duties set out below in this section. For Class I jobs, on-site inspections must be made at least once during each work shift, and at any time at employee request. For Class II and III jobs, on-site inspections must be made at intervals sufficient to assess whether conditions have changed, and at any reasonable time at employee request. (4) On all worksites where employees are engaged in Class I or II asbestos work, the competent person designated in accordance with WAC 296-62-07712 must perform or supervise the following duties, as applicable: (a) Set up the regulated area, enclosure, or other containment; (b) Ensure (by on-site inspection) the integrity of the enclosure or containment; (c) Set up procedures to control entry and exit from the enclosure and/or area; (d) Supervise all employee exposure monitoring required by this section and ensure that it is conducted as required by WaC 296-62-07709; (e) Ensure that employees working within the enclosure and/or using glovebags wear protective clothing and respirators as required by WAC 296-62-07715 and 296-62-07717; (f) Ensure through on-site supervision, that employees set up and remove engineering controls, use work practices and personal protective equipment in compliance with all requirements; (g) Ensure that employees use the hygiene facilities and observe the decontamination procedures specified in WAC 296-62-07719; (h) Ensure that through on-site inspection engineering controls are functioning properly and employees are using proper work practices; and (i) Ensure that notification requirements in WAC 296-62-07721 are met. (5) Training for competent person. (a) For Class I and II asbestos work the competent person must be trained in all aspects of asbestos removal and handling, including: Abatement, Installation, Removal and handling, The contents of this standard, The identification of asbestos, Removal procedures where appropriate, and Other practices for reducing the hazard. Such training must be the certified asbestos supervisor training specified in WAC 296-65-003, 296-65-012, and 296-65-030. Part I-1, Page 47 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07728 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (b) For Class III and IV asbestos work: (i) The competent person must be certified as an asbestos supervisor as prescribed in WAC 296-65-012 and 296-65-030 for Class III and IV work involving an asbestos project of 3 square feet or 3 linear feet or more of asbestos containing material. (ii) For Class III and IV asbestos work involving less than 3 square feet or 3 linear feet of asbestos containing material, the competent person must be trained in: Aspects of asbestos handling appropriate for the nature of the work, to include procedures for setting up glove bags and mini-enclosures. Practices for reducing asbestos exposures. Use of wet methods, The contents of this standard, and The identification of asbestos. Such training must include successful completion of a course equivalent in curriculum and training method to the 16-hour Operations and Maintenance course developed by EPA for maintenance and custodial workers (see 40 CFR 763.92 (a)(2)) or its equivalent in stringency, content and length. [Statutory Authority: RCW 49.17.040, .050, RCW 49.26.040 and RCW 49.26.130. 99-17-026 (Order 98-35), 296-62-07728, filed 08/10/99, effective 11/10/99. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-19-014, 296-62-07728, filed 9/5/97, effective 11/5/97; 97-01-079, 296-62-07728, filed 12/17/96, effective 3/1/97.] WAC 296-62-07733 Appendices. (1) Appendices A, D, E, and F to this part are incorporated as part of this section and the contents of these appendices are mandatory. (2) Appendices B, G, H, I, J and K to this part are informational and are not intended to create any additional obligations not otherwise imposed or to detract from any existing obligations. [Statutory Authority: RCW 49.17.010, .040, .050. 99-10 (Order 98-10) 296-62-07733, filed 05/04/99, effective 09/01/99. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07733, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 91-03-044 (Order 90-18), 296-62-07733, filed 1/10/91, effective 2/12/91; 87-24-051 (Order 87-24), 296-62-07733, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62-07733, filed 4/27/87.] WAC 296-62-07735 Appendix A--WISHA reference method--Mandatory. This mandatory appendix specifies the procedure for analyzing air samples for asbestos, tremolite, anthophyllite, and actinolite and specifies quality control procedures that must be implemented by laboratories performing the analysis. The sampling and analytical methods described below represent the elements of the available monitoring methods (such as Appendix B to this section, the most current version of the WISHA method ID-60, or the most current version of the NIOSH 7400 method) which WISHA considers to be essential to achieve adequate employee exposure monitoring while allowing employers to use methods that are already established within their organizations. All employers who are required to conduct air monitoring under WAC 296-62-07709 are required to utilize analytical laboratories that use this procedure, or an equivalent method, for collecting and analyzing samples. (1) Sampling and analytical procedure. (a) The sampling medium for air samples must be mixed cellulose ester filter membranes. These must be designated by the manufacturer as suitable for asbestos, tremolite, anthophyllite, and actinolite counting. See below for rejection of blanks. Part I-1, Page 48 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07735 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (b) The preferred collection device is the 25-mm diameter cassette with an open-faced 50-mm electrically conductive extension cowl. The 37-mm cassette may be used if necessary but only if written justification for the need to use the 37-mm filter cassette accompanies the sample results in the employee's exposure monitoring record. Do not reuse or reload cassettes for asbestos sample collection. (c) An air flow rate between 0.5 liter/min and 4.0 liters/min must be selected for the 25-mm cassette. If the 37-mm cassette is used, an air flow rate between 1 liter/min and 4.0 liters/min must be selected. (d) Where possible, a sufficient air volume for each air sample must be collected to yield between one hundred and one thousand three hundred fibers per square millimeter on the membrane filter. If a filter darkens in appearance or if loose dust is seen on the filter, a second sample must be started. (e) Ship the samples in a rigid container with sufficient packing material to prevent dislodging the collected fibers. Packing material that has a high electrostatic charge on its surface (e.g., expanded polystyrene) cannot be used because such material can cause loss of fibers to the sides of the cassette. (f) Calibrate each personal sampling pump before and after use with a representative filter cassette installed between the pump and the calibration devices. (g) Personal samples must be taken in the "breathing zone" of the employee (i.e., attached to or near the collar or lapel near the worker's face). (h) Fiber counts must be made by positive phase contrast using a microscope with an 8 to 10 X eyepiece and a 40 to 45 X objective for a total magnification of approximately 400 X and a numerical aperture of 0.65 to 0.75. The microscope shall also be fitted with a green or blue filter. (i) The microscope must be fitted with a Walton-Beckett eyepiece graticule calibrated for a field diameter of one hundred micrometers (+/-2 micrometers). (j) The phase-shift detection limit of the microscope must be about 3 degrees measured using the HSE phase shift test slide as outlined below. (i) Place the test slide on the microscope stage and center it under the phase objective. (ii) Bring the blocks of grooved lines into focus. Note: The slide consists ofseven sets ofgrooved lines (ca. 20 grooves to each block) in descending order of visibility from sets one to seven, seven being the least visible. The requirements for asbestos, tremolite, anthophyllite, and actinolite counting are that the microscope optics must resolve the grooved lines in set three completely although they may appear somewhat faint, and that the grooved lines in sets six and seven must be invisible. Sets four and five must be at leastpartially visible but may vary slightly in visibility between microscopes. A microscope that fails to meet these requirements has either too low or too high a resolution to be used for asbestos, tremolite, anthophyllite, and actinolite counting (iii) If the image deteriorates, clean and adjust the microscope optics. If the problem persists, consult the microscope manufacturer. Part I-1, Page 49 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07735 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (k) Each set of samples taken will include ten percent blanks or a minimum of two blanks. These blanks must come from the same lot as the filters used for sample collection. The field blank results must be averaged and subtracted from the analytical results before reporting. Any samples represented by a blank having a fiber count in excess of the detection limit of the method being used must be rejected. (l) The samples must be mounted by the acetone/triacetin method or a method with an equivalent index of refraction and similar clarity. (m) Observe the following counting rules. (i) Count only fibers equal to or longer than five micrometers. Measure the length of curved fibers along the curve. (ii) Count all particles as asbestos, tremolite, anthophyllite, and actinolite that have a lengthto-width ratio (aspect ratio) of three to one or greater. (iii) Fibers lying entirely within the boundary of the Walton-Beckett graticule field must receive a count of one. Fibers crossing the boundary once, having one end within the circle, must receive the count of one-half. Do not count any fiber that crosses the graticule boundary more than once. Reject and do not count any other fibers even though they may be visible outside the graticule area. (iv) Count bundles of fibers as one fiber unless individual fibers can be identified by observing both ends of an individual fiber. (v) Count enough graticule fields to yield 100 fibers. Count a minimum of 20 fields; stop counting at 100 fields regardless of fiber count. (n) Blind recounts must be conducted at the rate of ten percent. (2) Quality control procedures. (a) Intralaboratory program. Each laboratory and/or each company with more than one microscopist counting slides must establish a statistically designed quality assurance program involving blind recounts and comparisons between microscopists to monitor the variability of counting by each microscopist and between microscopists. In a company with more than one laboratory, the program must include all laboratories and must also evaluate the laboratory-to-laboratory variability. (b) Interlaboratory program. (i) Each laboratory analyzing asbestos, tremolite, anthophyllite, and actinolite samples for compliance determination shall implement an interlaboratory quality assurance program that as a minimum includes participation of at least two other independent laboratories. Each laboratory must participate in round robin testing at least once every six months with at least all the other laboratories in its interlaboratory quality assurance group. Each laboratory must submit slides typical of its own work load for use in this program. The round robin shall be designed and results analyzed using appropriate statistical methodology. (ii) All laboratories should participate in a national sample testing scheme such as the Proficiency Analytical Testing Program (PAT), the Asbestos Registry sponsored by the American Industrial Hygiene Association (AIHA). Part I-1, Page 50 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07735 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (c) All individuals performing asbestos, tremolite, anthophyllite, and actinolite analysis must have taken the NIOSH course for sampling and evaluating airborne asbestos, tremolite, anthophyllite, and actinolite dust or an equivalent course, recognized by the department. (d) When the use of different microscopes contributes to differences between counters and laboratories, the effect of the different microscope must be evaluated and the microscope must be replaced, as necessary. (e) Current results of these quality assurance programs must be posted in each laboratory to keep the microscopists informed. [Statutory Authority: RCW 49.17.040, .050, RCW 49.26.040 and RCW 49.26.130. 99-17-026 (Order 98-35), 296-62-07735, filed 08/10/99, effective 11/10/99. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07735, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 87-24-051 (Order 87-24), 296-62-07735, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62-07735, filed 4/27/87.] WAC 296-62-07737 Appendix B--Detailed procedure for asbestos sampling and analysis- Nonmandatory. Air Matrix: WISHA Permissible Exposure Limits: Time Weighted Average 0.1 fiber/cc Excursion Level (30 minutes) 1.0 fiber/cc Collection Procedure: A known volume of air is drawn through a 25-mm diameter cassette containing a mixed-cellulose ester filter. The cassette must be equipped with an electrically conductive 50-mm extension cowl. The sampling time and rate are chosen to give a fiber density of between 100 to 1,300 fibers/mm2 on the filter. Recommended Sampling Rate Recommended Air Volumes: 0.5 to 4.0 liters/minute (L/min) Minimum 25 L Maximum 2,400 L Analytical Procedure: A portion of the sample filter is cleared and prepared for asbestos fiber counting by Phase Contrast Microscopy (PCM) at 400X. Commercial manufacturers and products mentioned in this method are for descriptive use only and do not constitute endorsements by WISHA. Similar products from other sources can be substituted. Introduction. This method describes the collection of airborne asbestos fibers using calibrated sampling pumps with mixed-cellulose ester (MCE) filters and analysis by phase contrast microscopy (PCM). Some terms used are unique to this method and are defined below: Part I-1, Page 51 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07737 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite Asbestos: A term for naturally occurring fibrous minerals. Asbestos includes chrysotile, crocidolite, amosite (cummingtonite-grunerite asbestos), tremolite asbestos, actinolite asbestos, anthophyllite asbestos, and any of these minerals that have been chemically treated and/or altered. The precise chemical formulation of each species will vary with the location from which it was mined. Nominal compositions are listed: Chrysotile Crocidolite Mg3Si2O5(OH)4 Na2Fe32+Fe23+Si8O22(OH)2 Amosite (Mg,Fe)7Si8O22(OH)2 Tremolite-actinolite Ca2 (Mg,Fe) 5Si8O22(OH) 2 Anthophyllite (Mg,Fe) 7Si8O22(OH) 2 Asbestos Fiber: A fiber of asbestos which meets the criteria specified below for a fiber. Aspect Ratio: The ratio of the length of a fiber to it's diameter (e.g. 3:1, 5:1 aspect ratios). Cleavage Fragments: Mineral particles formed by comminution of minerals, especially those characterized by parallel sides and a moderate aspect ratio (usually less than 20:1). Detection Limit: The number of fibers necessary to be 95% certain that the result is greater than zero. Differential Counting: The term applied to the practice of excluding certain kinds of fibers from the fiber count because they do not appear to be asbestos. Fiber: A particle that is 5 pm or longer, with a length-to-width ratio of 3 to 1 or longer. Field: The area within the graticule circle that is superimposed on the microscope image. Set: The samples which are taken, submitted to the laboratory, analyzed, and for which, interim or final result reports are generated. Tremolite, Anthophyllite, and Actinolite: The non-asbestos form of these minerals which meet the definition of a fiber. It includes any of these minerals that have been chemically treated and/or altered. Walton-Beckett Graticule: An eyepiece graticule specifically designed for asbestos fiber counting. It consists of a circle with a projected diameter of 100 2 pm (area of about 0.00785 mm2) with a crosshair having tic-marks at 3-pm intervals in one direction and 5-pm in the orthogonal direction. There are marks around the periphery of the circle to demonstrate the proper sizes and shapes of fibers. The disk is placed in one of the microscope eyepieces so that the design is superimposed on the field of view. 1. History. (a) Early surveys to determine asbestos exposures were conducted using impinger counts of total dust with the counts expressed as million particles per cubic foot. The British Asbestos Research Council recommended filter membrane counting in 1969. In July 1969, the Bureau of Occupational Safety and Health published a filter membrane method for counting asbestos fibers in Part I-1, Page 52 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07737 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite the United States. This method was refined by NIOSH and published as P & CAM 239. On May 29, 1971, OSHA specified filter membrane sampling with phase contrast counting for evaluation of asbestos exposures at work sites in the United States. The use of this technique was again required by OSHA in 1986. Phase contrast microscopy has continued to be the method of choice for the measurement of occupational exposure to asbestos. (b) Principle. Air is drawn through a MCE filter to capture airborne asbestos fibers. A wedge shaped portion of the filter is removed, placed on a glass microscope slide and made transparent. A measured area (field) is viewed by PCM. All the fibers meeting a defined criteria for asbestos are counted and considered a measure of the airborne asbestos concentration. (c) Advantages and Disadvantages (i) There are four main advantages of PCM over other methods: (A) The technique is specific for fibers. Phase contrast is a fiber counting technique which excludes non-fibrous particles from the analysis. (B) The technique is inexpensive and does not require specialized knowledge to carry out the analysis for total fiber counts. (C) The analysis is quick and can be performed on-site for rapid determination of air concentrations of asbestos fibers. (D) The technique has continuity with historical epidemiological studies so that estimates of expected disease can be inferred from long-term determinations of asbestos exposures. (ii) The main disadvantage of PCM is that it does not positively identify asbestos fibers. Other fibers which are not asbestos may be included in the count unless differential counting is performed. This requires a great deal of experience to adequately differentiate asbestos from non-asbestos fibers. Positive identification of asbestos must be performed by polarized light or electron microscopy techniques. A further disadvantage of PCM is that the smallest visible fibers are about 0.2 pm in diameter while the finest asbestos fibers may be as small as 0.02 pm in diameter. For some exposures, substantially more fibers may be present than are actually counted. (d) Workplace Exposure. Asbestos is used by the construction industry in such products as shingles, floor tiles, asbestos cement, roofing felts, insulation and acoustical products. Non-construction uses include brakes, clutch facings, paper, paints, plastics, and fabrics. One of the most significant exposures in the workplace is the removal and encapsulation of asbestos in schools, public buildings, and homes. Many workers have the potential to be exposed to asbestos during these operations. About 95% of the asbestos in commercial use in the United States is chrysotile. Crocidolite and amosite make up most of the remainder. Anthophyllite and tremolite or actinolite are likely to be encountered as contaminants in various industrial products. (e) Physical Properties. Asbestos fiber possesses a high tensile strength along its axis, is chemically inert, non-combustible, and heat resistant. It has a high electrical resistance and good sound absorbing properties. It can be weaved into cables, fabrics or other textiles, and also matted into asbestos papers, felts, or mats. Part I-1, Page 53 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07737 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite 2. Range and Detection Limit. (a) The ideal counting range on the filter is 100 to 1,300 fibers/mm2. With a Walton-Beckett graticule this range is equivalent to 0.8 to 10 fibers/field. Using NIOSH counting statistics, a count of 0.8 fibers/field would give an approximate coefficient of variation (CV) of 0.13. (b) The detection limit for this method is 4.0 fibers per 100 fields or 5.5 fibers/mm2. This was determined using an equation to estimate the maximum CV possible at a specific concentration (95% confidence) and a Lower Control Limit of zero. The CV value was then used to determine a corresponding concentration from historical CV vs fiber relationships. As an example: Lower Control Limit (95% Confidence) = AC-1.645(CV)(AC) Where: AC Estimate of the airborne fiber concentration (fibers/cc) Setting the Lower Control Limit = 0 and solving for CV: 0 AC-1.645(CV)(AC) CV 0.61 This value was compared with CV vs. count curves. The count at which CV = 0.61 for Leidel-Busch counting statistics 8(i) or for an OSHA Salt Lake Technical Center (OSHA-SLTC) CV curve (see Appendix A for further information) was 4.4 fibers or 3.9 fibers per 100 fields, respectively. Although a lower detection limit of 4 fibers per 100 fields is supported by the OSHA-SLTC data, both data sets support the 4.5 fibers per 100 fields value. 3. Method Performance-Precision and Accuracy. Precision is dependent upon the total number of fibers counted and the uniformity of the fiber distribution on the filter. A general rule is to count at least 20 and not more than 100 fields. The count is discontinued when 100 fibers are counted, provided that 20 fields have already been counted. Counting more than 100 fibers results in only a small gain in precision. As the total count drops below 10 fibers, an accelerated loss of precision is noted. At this time, there is no known method to determine the absolute accuracy of the asbestos analysis. Results of samples prepared through the Proficiency Analytical Testing (PAT) Program and analyzed by the OSHA-SLTC showed no significant bias when compared to PAT reference values. The PAT samples were analyzed from 1987 to 1989 (N = 36) and the concentration range was from 120 to 1,300 fibers/mm2. 4. Interferences. Fibrous substances, if present, may interfere with asbestos analysis. Some common fibers are: Fiber glass Perlite veins. Anhydrite plant fibers gypsum Membrane structures Microorganisms Some synthetic fibers. Sponge spicules and diatoms. Wollastonite. The use of electron microscopy or optical tests such as polarized light, and dispersion staining may be used to differentiate these materials from asbestos when necessary. Part I-1, Page 54 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07737 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite 5. Sampling. (a) Equipment. (i) Sample assembly. Conductive filter holder consisting of a 25-mm diameter, 3-piece cassette having a 50-mm long electrically conductive extension cowl. Backup pad, 25 mm, cellulose. Membrane filter, mixed-cellulose ester (MCE), 25-mm, plain, white, 0.8to 1.2-pm pore size. Notes: (A) DO NOT RE-USE CASSETTES. (B) Fully conductive cassettes are required to reduce fiber loss to the sides of the cassette due to electrostatic attraction. (C) Purchase filters which have been selected by the manufacturer for asbestos counting or analyze representative filters for fiber background before use. Discard the filter lot if more than 5 fibers/100 fields are found. (D) To decrease the possibility of contamination, the sampling system (filter-backup pad-cassette) for asbestos is usually preassembled by the manufacturer. (ii) Gel bands for sealing cassettes. (iii) Sampling pump. Each pump must be a battery operated, self-contained unit small enough to be placed on the monitored employee and not interfere with the work being performed. The pump must be capable of sampling at 2.5 liters per minute (L/min) for the required sampling time. (iv) Flexible tubing, 6-mm bore. (v) Pump calibration. Stopwatch and bubble tube/burette or electronic meter. (b) Sampling Procedure. (i) Seal the point where the base and cowl of each cassette meet with a gel band or tape. (ii) Charge the pumps completely before beginning. (iii) Connect each pump to a calibration cassette with an appropriate length of 6-mm bore plastic tubing. Do not use luer connectors--the type of cassette specified above has builtin adapters. (iv) Select an appropriate flow rate for the situation being monitored. The sampling flow rate must be between 0.5 and 4.0 L/min for personal sampling and is commonly set between 1 and 2 L/min. Always choose a flow rate that will not produce overloaded filters. Part I-1, Page 55 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07737 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (v) Calibrate each sampling pump before and after sampling with a calibration cassette in line (Note: This calibration cassette should be from the same lot of cassettes used for sampling). Use a primary standard (e.g. bubble burette) to calibrate each pump. If possible, calibrate at the sampling site. Note: Ifsampling site calibration is not possible, environmental influences may affect the flow rate. The extent is dependent on the type ofpump used. Consult with the pump manufacturer to determine dependence on environmental influences. If the pump is affected by temperature andpressure changes, use the formula in subsection (10) of this section to calculate the actual Tow rate. (vi) Connect each pump to the base of each sampling cassette with flexible tubing. Remove the end cap of each cassette and take each air sample open face. Assure that each sample cassette is held open side down in the employee's breathing zone during sampling. The distance from the nose/mouth of the employee to the cassette should be about 10 cm. Secure the cassette on the collar or lapel of the employee using spring clips or other similar devices. (vii) A suggested minimum air volume when sampling to determine TWA compliance is 25 L. For Excursion Limit (30 min sampling time) evaluations, a minimum air volume of 48 L is recommended. (viii) The most significant problem when sampling for asbestos is overloading the filter with non-asbestos dust. Suggested maximum air sample volumes for specific environments are: Environment Asbestos removal operations (visible dust) Asbestos removal operations (little dust) Office environments Air Vol. (L) 100 240 400 to 2,400 Caution: Do not overload the filter with dust. High levels ofnon-fibrous dust particles may obscure fibers on the filter and lower the count or make counting impossible. Ifmore than about 25 to 30% of the field area is obscured with dust, the result may be biased low. Smaller air volumes may be necessary when there is excessive non-asbestos dust in the air. While sampling, observe the filter with a small flashlight. If there is a visible layer of dust on the filter, stop sampling remove and seal the cassette, and replace with a new sampling assembly The total dust loading should not exceed 1 mg. (ix) Blank samples are used to determine if any contamination has occurred during sample handling. Prepare two blanks for the first 1 to 20 samples. For sets containing greater than 20 samples, prepare blanks as 10% of the samples. Handle blank samples in the same manner as air samples with one exception: Do not draw any air through the blank samples. Open the blank cassette in the place where the sample cassettes are mounted on the employee. Hold it open for about 30 seconds. Close and seal the cassette appropriately. Store blanks for shipment with the sample cassettes. (x) Immediately after sampling, close and seal each cassette with the base and plastic plugs. Do not touch or puncture the filter membrane as this will invalidate the analysis. Part I-1, Page 56 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07737 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (xi) Attach a seal (OSHA-21 or equivalent) around each cassette in such a way as to secure the end cap plug and base plug. Tape the ends of the seal together since the seal is not long enough to be wrapped end-to-end. Also wrap tape around the cassette at each joint to keep the seal secure. (c) Sample Shipment. (i) Send the samples to the laboratory with paperwork requesting asbestos analysis. List any known fibrous interferences present during sampling on the paperwork. Also, note the workplace operation(s) sampled. (ii) Secure and handle the samples in such that they will not rattle during shipment nor be exposed to static electricity. Do not ship samples in expanded polystyrene peanuts, vermiculite, paper shreds, or excelsior. Tape sample cassettes to sheet bubbles and place in a container that will cushion the samples without rattling. (iii) To avoid the possibility of sample contamination, always ship bulk samples in separate mailing containers. 6. Analysis. (a) Safety Precautions. (i) Acetone is extremely flammable and precautions must be taken not to ignite it. Avoid using large containers or quantities of acetone. Transfer the solvent in a ventilated laboratory hood. Do not use acetone near any open flame. For generation of acetone vapor, use a spark free heat source. (ii) Any asbestos spills should be cleaned up immediately to prevent dispersal of fibers. Prudence should be exercised to avoid contamination of laboratory facilities or exposure of personnel to asbestos. Asbestos spills should be cleaned up with wet methods and/or a High Efficiency Particulate-Air (HEPA) filtered vacuum. Caution: (b) Do not use a vacuum without a HEPA filter--It will disperse fine asbestos fibers in the air. Equipment. (i) Phase contrast microscope with binocular or trinocular head. (ii) Widefield or Huygenian 10X eyepieces (NOTE: The eyepiece containing the graticule must be a focusing eyepiece. Use a 40X phase objective with a numerical aperture of 0.65 to 0.75). (iii) Kohler illumination (if possible) with green or blue filter. (iv) Walton-Beckett Graticule, type G-22 with 100 2pm projected diameter. (v) Mechanical stage. A rotating mechanical stage is convenient for use with polarized light. (vi) Phase telescope. (vii) Stage micrometer with 0.01-mm subdivisions. Part I-1, Page 57 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07737 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (viii) Phase-shift test slide, mark II (Available from PTR optics Ltd., and also McCrone). (ix) Precleaned glass slides, 25 mm X 75 mm. One end can be frosted for convenience in writing sample numbers, etc., or paste-on labels can be used. (x) Cover glass #1-1/2. (xi) Scalpel (#10, curved blade). (xii) Fine tipped forceps. (xiii) Aluminum block for clearing filter. (xiv) Automatic adjustable pipette, 100- to 500-pL. (xv) Micropipette, 5 pL. (c) Reagents. (i) Acetone (HPLC grade). (ii) Triacetin (glycerol triacetate). (iii) Lacquer or nail polish. (d) Standard Preparation. A way to prepare standard asbestos samples of known concentration has not been developed. It is possible to prepare replicate samples of nearly equal concentration. This has been performed through the PAT program. These asbestos samples are distributed by the AIHA to participating laboratories. Since only about one-fourth of a 25-mm sample membrane is required for an asbestos count, any PAT sample can serve as a "standard" for replicate counting. (e) Sample Mounting. Note: See Safety Precautions in (6) (a) before proceeding. The objective is to produce samples with a smooth (non-grainy) background in a medium with a refractive index ofapproximately 1.46. The technique below collapses the filter for easier focusing andproduces permanent mounts which are useful for quality control and interlaboratory comparison. An aluminum block or similar device is required for sample preparation. (i) Heat the aluminum block to about 70C. The hot block should not be used on any surface that can be damaged by either the heat or from exposure to acetone. (ii) Ensure that the glass slides and cover glasses are free of dust and fibers. (iii) Remove the top plug to prevent a vacuum when the cassette is opened. Clean the outside of the cassette if necessary. Cut the seal and/or tape on the cassette with a razor blade. Very carefully separate the base from the extension cowl, leaving the filter and backup pad in the base. (iv) With a rocking motion cut a triangular wedge from the filter using the scalpel. This wedge should be one-sixth to one-fourth of the filter. Grasp the filter wedge with the forceps on the perimeter of the filter which was clamped between the cassette pieces. DO NOT TOUCH the filter with your finger. Place the filter on the glass slide sample side up. Static electricity will usually keep the filter on the slide until it is cleared. Part I-1, Page 58 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07737 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (v) Place the tip of the micropipette containing about 200 pL acetone into the aluminum block. Insert the glass slide into the receiving slot in the aluminum block. Inject the acetone into the block with slow, steady pressure on the plunger while holding the pipette firmly in place. Wait 3 to 5 seconds for the filter to clear, then remove the pipette and slide from the aluminum block. (vi) Immediately (less than 30 seconds) place 2.5 to 3.5 pL of triacetin on the filter (Note: Waiting longer than 30 seconds will result in increased index of refraction and decreased contrast between the fibers and the preparation. This may also lead to separation of the cover slip from the slide). (vii) Lower a cover slip gently onto the filter at a slight angle to reduce the possibility of forming air bubbles. If more than 30 seconds have elapsed between acetone exposure and triacetin application, glue the edges of the cover slip to the slide with lacquer or nail polish. (viii) If clearing is slow, warm the slide for 15 min on a hot plate having a surface temperature of about 50C to hasten clearing. The top of the hot block can be used if the slide is not heated too long. (ix) Counting may proceed immediately after clearing and mounting are completed. (f) Sample Analysis. Completely align the microscope according to the manufacturer's instructions. Then, align the microscope using the following general alignment routine at the beginning of every counting session and more often if necessary. (i) Alignment. (A) Clean all optical surfaces. Even a small amount of dirt can significantly degrade the image. (B) Rough focus the objective on a sample. (C) Close down the field iris so that it is visible in the field of view. Focus the image of the iris with the condenser focus. Center the image of the iris in the field of view. (D) Install the phase telescope and focus on the phase rings. Critically center the rings. Misalignment of the rings results in astigmatism which will degrade the image. (E) Place the phase-shift test slide on the microscope stage and focus on the lines. The analyst must see line set 3 and should see at least parts of 4 and 5 but, not see line set 6 or 6. A microscope/microscopist combination which does not pass this test may not be used. (ii) Counting Fibers. (A) Place the prepared sample slide on the mechanical stage of the microscope. Position the center of the wedge under the objective lens and focus upon the sample. Part I-1, Page 59 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07737 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (B) Start counting from one end of the wedge and progress along a radial line to the other end (count in either direction from perimeter to wedge tip). Select fields randomly, without looking into the eyepieces, by slightly advancing the slide in one direction with the mechanical stage control. (C) Continually scan over a range of focal planes (generally the upper 10 to 15 pm of the filter surface) with the fine focus control during each field count. Spend at least 5 to 15 seconds per field. (D) Most samples will contain asbestos fibers with fiber diameters less than 1p. Look carefully for faint fiber images. The small diameter fibers will be very hard to see. However, they are an important contribution to the total count. (E) Count only fibers equal to or longer than 5p. Measure the length of curved fibers along the curve. (F) Count fibers which have a length to width ratio of 3:1 or greater. (G) Count all the fibers in at least 20 fields. Continue counting until either 100 fibers are counted or 100 fields have been viewed; whichever occurs first. Count all the fibers in the final field. (H) Fibers lying entirely within the boundary of the Walton-Beckett graticule field receive a count of 1. Fibers crossing the boundary once, having one end within the circle receive a count of 1/2. Do not count any fiber that crosses the graticule boundary more than once. Reject and do not count any other fibers even though they may be visible outside the graticule area. If a fiber touches the circle, it is considered to cross the line. (I) Count bundles of fibers as one fiber unless individual fibers can be clearly identified and each individual fiber is clearly not connected to another counted fiber. (J) Record the number of fibers in each field in a consistent way such that filter non-uniformity can be assessed. (K) Regularly check phase ring alignment. (L) When an agglomerate (mass of material) covers more than 25% of the field of view, reject the field and select another. Do not include it in the number of fields counted. (M) Perform a "blind recount" of 1 in every 10 filter wedges (slides). Re-label the slides using a person other than the original counter. (g) Fiber Identification. As previously mentioned in (1)(c), PCM does not provide positive confirmation of asbestos fibers. Alternate differential counting techniques should be used if discrimination is desirable. Differential counting may include primary discrimination based on morphology, polarized light analysis of fibers, or modification of PCM data by Scanning Electron or Transmission Electron Microscopy. A great deal of experience is required to routinely and correctly perform differential counting. It is discouraged unless it is legally necessary. Then, only if a fiber is obviously not asbestos should it be excluded from the count. Further discussion of this technique can be found in reference 8(j). If there is a question whether a fiber is asbestos or not, follow the rule: "WHEN IN DOUBT, COUNT." Part I-1, Page 60 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07737 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (h) Analytical Recommendations--Quality Control System. (i) All individuals performing asbestos analysis must have taken the NIOSH course for sampling and evaluating airborne asbestos or an equivalent course. (ii) Each laboratory engaged in asbestos counting must set up a slide trading arrangement with at least two other laboratories in order to compare performance and eliminate inbreeding of error. The slide exchange occurs at least semiannually. The round robin results must be posted where all analysts can view individual analyst's results. (iii) Each laboratory engaged in asbestos counting must participate in the Proficiency Analytical Testing Program, the Asbestos Analyst Registry or equivalent. (iv) Each analyst must select and count prepared slides from a "slide bank". These are quality assurance counts. The slide bank must be prepared using uniformly distributed samples taken from the workload. Fiber densities should cover the entire range routinely analyzed by the laboratory. These slides are counted blind by all counters to establish an original standard deviation. This historical distribution is compared with the quality assurance counts. A counter must have 95% of all quality control samples counted within three standard deviations of the historical mean. This count is then integrated into a new historical mean and standard deviation for the slide. The analyses done by the counters to establish the slide bank may be used for an interim quality control program if the data are treated in a proper statistical fashion. 7. Calculations. (a) Calculate the estimated airborne asbestos fiber concentration on the filter sample using the following formula: KflHrfBI] X ECA AC = 1000 X FR X T X MFA Where: AC FB FL BFB BFL ECA FR MFA T 1,000 Airborne fiber concentration Total number of fibers greater than 5 pm counted Total number of fields counted on the filter Total number of fibers greater than 5pm counted in the blank Total number of fields counted on the blank Effective collecting area of filter (385 mm2 nominal for a 25-mm filter.) Pump flow rate (L/min) Microscope count field area (mm2). This is 0.00785 mm2 for a WaltonBeckett Graticule. Sample collection time (min) Conversion of L to cc Note: The collection area ofa filter is seldom equal to 385 mmf. It is appropriate for laboratories to routinely monitor the exact diameter using an inside micrometer. The collection area is calculated according to the formula: Part I-1, Page 61 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07737 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite Area = n(d/2)2 (b) Short-cut Calculation Since a given analyst always has the same interpupillary distance, the number of fields per filter for a particular analyst will remain constant for a given size filter. The field size for that analyst is constant (i.e. the analyst is using an assigned microscope and is not changing the reticle). For example, if the exposed area of the filter is always 385 mm2 and the size of the field is always 0.00785 mm2, the number of fields per filter will always be 49,000. In addition it is necessary to convert liters of air to cc. These three constants can then be combined such that ECA/(1,000 X MFA) = 49. The previous equation simplifies to: -[BEBl AC l BFI i X 49 ER X T (c) Recount Calculations. As mentioned in step 13 of 6 (f)(ii), a "blind recount" of 10% of the slides is performed. In all cases, differences will be observed between the first and second counts of the same filter wedge. Most of these differences will be due to chance alone, that is, due to the random variability (precision) of the count method. Statistical recount criteria enables one to decide whether observed differences can be explained due to chance alone or are probably due to systematic differences between analysts, microscopes, or other biasing factors. The following recount criterion is for a pair of counts that estimate AC in fibers/cc. The criterion is given at the type-I error level. That is, there is 5% maximum risk that we will reject a pair of counts for the reason that one might be biased, when the large observed difference is really due to chance. Reject a pair of counts if: 'vfAC >2.78 X^ACaJx CVfe Where: ACi AC2 ACavg CVFB lower estimated airborne fiber concentration higher estimated airborne fiber concentration average of the two concentration estimates CV for the average of the two concentration estimates If a pair of counts are rejected by this criterion then, recount the rest of the filters in the submitted set. Apply the test and reject any other pairs failing the test. Rejection shall include a memo to the industrial hygienist stating that the sample failed a statistical test for homogeneity and the true air concentration may be significantly different than the reported value. (d) Reporting Results. Report results to the industrial hygienist as fibers/cc. Use two significant figures. If multiple analyses are performed on a sample, an average of the results is to be reported unless any of the results can be rejected for cause. Part I-1, Page 62 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07737 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite 8. References. (a) Dreesen, W.C., et al, U.S. Public Health Service: A Study of Asbestosis in the Asbestos Textile Industry, (Public Health Bulletin No. 241), US Treasury Dept., Washington, DC, 1938. (b) Asbestos Research Council: The Measurement of Airborne Asbestos Dust by the Membrane Filter Method (Technical Note), Asbestos Research Council, Rockdale, Lancashire, Great Britain, 1969. (c) Bayer, S.G., Zumwalde, R.D., Brown, T.A., Equipment and Procedure for Mounting Millipore Filters and Counting Asbestos Fibers by Phase Contrast Microscopy, Bureau of Occupational Health, U.S. Dept. of Health, Education and Welfare, Cincinnati,OH,1969. (d) NIOSH Manual of Analytical Methods, 2nd ed., Vol. 1 (DHEW/NIOSH Pub. No. 77-157-A). National Institute for Occupational Safety and Health, Cincinnati, OH, 1977.pp.239-1-239-21. (e) Asbestos, Code of Federal Regulations 29 CFR 1910.1001. 1971. (f) Occupational Exposure to Asbestos, Tremolite, Anthophyllite, and Actinolite. Final Rule, Federal Register 51: 119 (20 June 1986). pp.22612-22790. (g) Asbestos, Tremolite, Anthophyllite, and Actinolite, Code of Federal Regulations 1910.1001. 1988. pp 711-752. (h) Criteria for a Recommended Standard-Occupational Exposure to Asbestos (DHEW/NIOSH Pub. No. HSM 72-10267), National Institute for Occupational Safety and Health NIOSH, Cincinnati, OH, 1972. pp. III-1-III-24. (i) Leidel, N.A., Bayer, S.G., Zumwalde, R.D., Busch, K.A., USPHS/NIOSH Membrane Filter Method for Evaluating Airborne Asbestos Fibers (DHEW/NIOSH Pub. No. 79-127). National Institute for Occupational Safety and Health, Cincinnati, OH, 1979. (j) Dixon, W.C., Applications of Optical Microscopy in Analysis of Asbestos and Quartz, Analytical Techniques in Occupational Health Chemistry, edited by D.D. Dollberg and A.W. Verstuyft. Wash. D.C.: American Chemical Society, (ACS Symposium Series 120) 1980. pp. 13-41. 9. Quality Control. The OSHA asbestos regulations require each laboratory to establish a quality control program. The following is presented as an example of how the OSHA-SLTC constructed its internal CV curve as part of meeting this requirement. Data for the CV curve shown below is from 395 samples collected during OSHA compliance inspections and analyzed from October 1980 through April 1986. Each sample was counted by 2 to 5 different counters independently of one another. The standard deviation and the CV statistic was calculated for each sample. This data was then plotted on a graph of CV vs. fibers/mm2. A least squares regression was performed using the following equation: Where: CV = antilogio[A(logio(x))2+B(logio(x))+C] x= A= B= C= the number of fibers/mm2 Application of least squares gave: 0.182205 -0.973343 0.327499 Using these values, the equation becomes: CV = antilog10[0.182205(log10 (x))2 - 0.973343(log 10(x)) + 0.327499]. Part I-1, Page 63 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07737 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite 10. Sampling Pump Flow Rate Corrections. This correction is used if a difference greater than 5% in ambient temperature and/or pressure is noted between calibration and sampling sites and the pump does not compensate for the differences. Qact= Qcal X Where: Qact Qcal Pcal Pact Tact Tcal = = = = = = actual flow rate calibrated flow rate (if a rotameter was used, the rotameter value) uncorrected air pressure at calibration uncorrected air pressure at sampling site temperature at sampling site (K) temperature at calibration (K) 11. Walton-Beckett Graticule When ordering the Graticule for asbestos counting, specify the exact disc diameter needed to fit the ocular of the microscope and the diameter (mm) of the circular counting area. Instructions for measuring the dimensions necessary are listed: (a) Insert any available graticule into the focusing eyepiece and focus so that the graticule lines are sharp and clear. (b) Align the microscope. (c) Place a stage micrometer on the microscope object stage and focus the microscope on the graduated lines. (d) Measure the magnified grid length, PL (pm), using the stage micrometer. (e) Remove the graticule from the microscope and measure its actual grid length, AL (mm). This can be accomplished by using a mechanical stage fitted with verniers, or a jeweler's loupe with a direct reading scale. (f) Let D = 100 pm. Calculate the circle diameter, dc (mm), for the Walton-Beckett graticule and specify the diameter when making a purchase: Example: If PL = 108 pm, AL = 2.93 mm and D = 100 pm, then, dc = (2.93 x 100)/108 = 2.71 mm (g) Each eyepiece-objective-reticle combination on the microscope must be calibrated. Should any of the three be changed (by zoom adjustment, disassembly, replacement, etc.), the combination must be recalibrated. Calibration may change if interpupillary distance is changed. Measure the field diameter, D (acceptable range: 100 2 pm) with a stage micrometer upon receipt of the graticule from the manufacturer. Determine the field area (mm2). Part I-1, Page 64 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07737 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite Field Area = n(D/2)2 If D = 100 pm = 0.1 mm, then Field Area = +(0.1 mm/2)2 = 0.00785 mm2 The Graticule is available from: Graticules Ltd., Morley Road, Tonbridge TN9 IRN, Kent, England (Telephone 011-44-732-359061). Also available from PTR Optics Ltd., 145 Newton Street, Waltham, MA 02154 [telephone (617) 891-6000] or McCrone Accessories and Components, 2506 S. Michigan Ave., Chicago, IL 60616 [phone (312) 842-7100]. The graticule is custom made for each microscope. BILLING CODE 4510-26-P Figure 1: Walton-Beckett Graticule with some explanatory fibers. Counts for the Fibers in the Figure Structure No. Count Explanation 1 to 6 1 Single fibers all contained within the circle. 7 1/2 Fiber crosses circle once. 8 0 Fiber too short. 9 2 Two crossing fibers. 10 0 Fiber outside graticule. 11 0 Fiber crosses graticule twice. 12 1/2 Although split, fiber only crosses once. [Statutory Authority: RCW 49.17.040, .050, RCW 49.26.040 and RCW 49.26.130. 99-17-026 (Order 98-35), 296-62 07737, filed 08/10/99, effective 11/10/99. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07737, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 87-24-051 (Order 87-24), 296- 62-07737, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-6207737, filed 4/27/87.] Part I-1, Page 65 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite WAC 296-62-07741 Appendix D--Medical questionnaires--Mandatory. This mandatory appendix contains the medical questionnaires that must be administered to all employees who are exposed to asbestos, tremolite, anthophyllite, and actinolite, or a combination of these minerals above the permissible exposure limit (0.1 f/cc), and who will therefore be included in their employer's medical surveillance program. Part 1 of the appendix contains the initial medical questionnaire, which must be obtained for all new hires who will be covered by the medical surveillance requirements. Part 2 includes the abbreviated periodical medical questionnaire, which appendix contains the medical questionnaires that must be administered to all employees who are must be administered to all employees who are provided periodic medical examinations under the medical surveillance provisions of the standard. PART 1 INITIAL MEDICAL QUESTIONNAIRE 1. NAME________________________________________________ 2. SOCIAL SECURITY #........................................................ 12 34 56 7 89 3. CLOCK NUMBER ................................. 10 11 12 13 14 15 4. PRESENT OCCUPATION______________________________ 5. PLANT_______________________________________________ 6. ADDRESS____________________________________________ 7. (Zip Code) 8. TELEPHONE NUMBER 9. INTERVIEWER_______ 10. DATE________________ 16 17 18 19 20 21 11. Date of birth ............ Month Day Year 22 23 24 25 26 27 12. Place of birth__________________________________ 13. Sex 1. Male 2. Female 14. What is your marital status? 1. Single 4. Separated/ 2. Married____ Divorced _ 3. Widowed___ 15. Race 1. White 4. Hispanic _ 2. Black 5. Indian ___ 3. Asian 6. Other____ 16. What is the highest grade completed in school?___ (For example 12 years is completion of high school) OCCUPATIONAL HISTORY 17A. Have you ever worked full time (30 hours per week or more) for 6 months or more? If yes to 17A: B. Have you ever worked for a year or more in any dusty job? Specify job/industry Was dust exposure: C Have you ever been exposed to gas or chemical fumes in your work? Specify job/industry Was exposure: 1. Yes2. No 1. Yes2. No 3. Does not apply_____ Total years worked 1. Mild2. Moderate3. Severe _ 1. Yes2. No Total years worked 1. Mild2. Moderate3. Severe Part I-1, Page 66 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07741 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite D What has been your usual occupation or job--the one you have worked at the longest? 1. Job occupation 2. Number of years employed in this occupation 3. Position/job title 4. Business, field or industry (Record on lines the years in which you have worked in any of these industries, e.g., 1960-1969. Have you ever worked: YES NO E. In a mine? rr F. In a quarry? G In a foundry? rr rr H. In a pottery? rr I. In a cotton, flax or hemp mill? r r J. With asbestos? rr 18. PAST MEDICAL HISTORY A. Do you consider yourself to be YES in good health? If "no" state reason B. Have you any defect in vision? r r If "yes" state nature of defect_______________________ C. Have you any hearing defect? r If "yes" state nature of defect_______________________ D. Are you suffering from or have you ever suffered from: a. Epilepsy (or fits, seizures, convulsions)? r b. Rheumatic fever? c. Kidney disease? r r d. Bladder disease? r e. Diabetes? r f. Jaundice r NO r r r 19. 20A. 21. 22. CHEST COLDS AND CHEST ILLNESSES 19A. If you get a cold, does it usually go to your chest? (Usually means more than 1/2 the time.) During the past 3 years, have you had any chest illnesses that have kept you off work, indoors at home, or in bed? If yes to 20A: B Did you produce phlegm with any of these chest illnesses? C. In the last 3 years, how many such illnesses with (increased) phlegm did you have which lasted a week or more? Did you have any lung trouble before the age of 16? Have you ever had any of the following? 1A Attacks of bronchitis? 1. Yes_____ 2. No _ 3. Don't get colds 1. Yes2. No__________ 1. Yes 2. No 3. Does not apply__ Number of illnesses No such illnesses __ 1. Yes 2. No 1. Yes 2. No Part I-1, Page 67 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07741 (Cont.) If yes to 1A: B. Was it confirmed by a doctor? C. At what age was your first attack? 2A. Pneumonia? (include bronchopneumonia) If yes to 2A: B. Was it confirmed by a doctor? C. At what age did you first have it? 3A. Hay fever? If yes to 3A: B. Was it confirmed by a doctor? C. At what age did it start? 23A. Have you ever had chronic bronchitis? If yes to 23A: B. Do you still have it? C. Was it confirmed by a doctor? D At what age did it start? 24A. Have you ever had emphysema? If yes to 24A: B. Do you still have it? C. Was it confirmed by a doctor? D. At what age did it start? 25A. Have you ever had asthma? If yes to 25A: B. Do you still have it? C. Was it confirmed by a doctor? D. At what age did it start? 26. 27A. E. If you no longer have it, at what age did it stop? Have you ever had: A. Any other chest illness? If yes, please specify____ B. Any chest operations? If yes, please specify____ C. Any chest injuries? If yes, please specify ____ Has a doctor ever told you that you had heart trouble? If yes to 27A: Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite 1. Yes 2. No 3. Does not apply __ Age in years Does not apply 1. Yes 2. No 1. Yes 2. No 3. Does not apply __ Age in years Does not apply 1. Yes 2. No 1. Yes 2. No 3. Does not apply __ Age in years Does not apply 1. Yes 2. No 1. Yes 2. No 3. Does not apply __ 1. Yes 2. No 3. Does not apply __ Age in years Does not apply 1. Yes 2. No 1. Yes 2. No 3. Does not apply __ 1. Yes 2. No 3. Does not apply __ Age in years Does not apply 1. Yes 2. No 1. Yes 2. No 3. Does not apply __ 1. Yes 2. No 3. Does not apply __ Age in years Does not apply Age stopped Does not apply 1. Yes 2. No 1. Yes 2. No 1. Yes 2. No 1. Yes 2. No Part I-1, Page 68 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07741 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite 28A. 29. 30. B. Have you ever had treatment for heart 1. Yes __ 2. No ____ trouble in the past 10 years? 3. Does not apply Has a doctor ever told you that you 1. Yes __ 2. No ____ had high blood pressure? If yes to 28A: B. Have you had any treatment for high 1. Yes ___ __ 2. No ____ blood pressure (hypertension) in the 3. Does not apply past 10 years? When did you last have your chest x-rayed? (Year) ..................... 25 26 27 28 Where did you last have your chest x-rayed (if known)? What was the outcome?_______________________________ FAMILY HISTORY 31. Were either of your natural parents ever told by a doctor that they had a chronic lung condition such as: FATHER MOTHER 1. Yes 2. No. 3. Don't 1. Yes 2. No 3. Don't Know Know A. Chronic Bronchitis? _____ _____ _____ _____ _____ _____ B. Emphysema? _____ _____ _____ _____ _____ _____ C. Asthma? _____ _____ _____ _____ _____ _____ D. Lung cancer? _____ _____ _____ _____ _____ _____ E. Other chest conditions? _____ _____ _____ _____ _____ _____ F. Is parent currently alive? G. Please specify _ ____ Age if living Age if living ____ Age at death Age at death Don't know Don't know _ H. Please specify cause of death__________ 32A. COUGH Do you usually have a cough? (Count 1. Yes2. No _ a cough with first smoke or on first going out of doors. Exclude clearing of throat.) (If no, skip to question 32C.) B. Do you usually cough as much as 4 to 1. Yes2. No _ 6 times a day 4 or more days out of the week? C. Do you usually cough at all on getting 1. Yes2. No _ up or first thing in the morning? D. Do you usually cough at all during the 1. Yes2. No _ rest of the day or at night? IF YES TO ANY OF ABOVE (32A, B, C, OR D), ANSWER THE FOLLOWING. IF NO TO ALL, CHECK DOES NOT APPLY AND SKIP TO NEXT PAGE E. Do you usually cough like this on most 1. Yes 2. No days for 3 consecutive months or more 3. Does not apply _ during the year? F. For how many years have you had Number of years the cough? Does not apply __ Part I-1, Page 69 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07741 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite 33A. 34A. Do you usually bring up phlegm from 1. Yes 2. No your chest? (Count phlegm with the first smoke or on first going out of doors. Exclude phlegm from the nose. Count swallowed phlegm.) (If no, skip to 33C.) B. Do you usually bring up phlegm like 1. Yes 2. No this as much as twice a day 4 or more days out of the week? C. Do you usually bring up phlegm at 1. Yes 2. No all on getting up or first thing in the morning? D. Do you usually bring up phlegm at all 1. Yes 2. No during the rest of the day or at night? IF YES TO ANY OF THE ABOVE (33A, B, C, OR D), ANSWER THE FOLLOWING: IF NO TO ALL, CHECK DOES NOT APPLY AND SKIP TO 34A. E. Do you bring up phlegm like this on 1. Yes 2. No most days for 3 consecutive months 3. Does not apply or more during the year? F. For how many years have you had Number of years trouble with phlegm? Does not apply episodes of cough and phlegm Have you had periods or episodes of 1. Yes 2. No increased*) cough and phlegm lasting for 3 weeks or more each year? *(For persons who usually have cough and/or phlegm.) If yes to 34A: B. For how long have you had at least Number of years 1 such episode per year? Does not apply 35A. 36A. WHEEZING Does your chest ever sound wheezy or whistling: 1. When you have a cold? 1. Yes 2. No 2. Occasionally apart from colds? 1. Yes 2. No 3. Most days or nights? 1. Yes 2. No If yes to 1, 2, or 3 in 35A: B. For how many years has this been Number of years present? Does not apply Have you ever had an attack of 1. Yes 2. No wheezing that has made you feel short of breath? If yes to 36A: B. How old were you when you had your Age in years first such attack? Does not apply C. Have you had 2 or more such episodes? 1. Yes 2. No 3. Does not apply D. Have you ever required medicine or 1. Yes 2. No treatment for the(se) attack(s)? 3. Does not apply Part I-1, Page 70 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07741 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite 37. 38A. BREATHLESSNESS If disabled from walking by any condition other than heart or lung disease, please describe and proceed to question 39A. Nature of condition(s) Are you troubled by shortness of breath when hurrying on the level or walking up a slight hill? If yes to 38A: B. Do you have to walk slower than people of your age on the level because of breathlessness? C. Do you ever have to stop for breath when walking at your own pace on the level? D. Do you ever have to stop for breath after walking about 100 yards (or after a few minutes) on the level? E. Are you too breathless to leave the house or breathless on dressing or climbing one flight of stairs? 1. Yes2. No 1. Yes _____ 2. No ____ 3. Does not apply 1. Yes _____2. No ____ 3. Does not apply 1. Yes _____2. No ____ 3. Does not apply 1. Yes _____ 2. No ____ 3. Does not apply 39A. 40A. TOBACCO SMOKING Have you ever smoked cigarettes? (No means less than 20 packs of cigarettes or 12 oz. of tobacco in a lifetime or less than 1 cigarette a day for 1 year.) If yes to 39A: B. Do you now smoke cigarettes (as of one month ago)? C. How old were you when you first started regular cigarette smoking? D. If you have stopped smoking cigarettes completely, how old were you when you stopped? E. How many cigarettes do you smoke per day now? F. On the average of the entire time you smoked, how many cigarettes did you smoke per day? G. Do you or did you inhale the cigarette smoke? Have you ever smoked a pipe regularly? (Yes means more than 12 ounces of tobacco in a lifetime.) If yes to 40A: 1. Yes 2. No 1. Yes2. No _ 3. Does not apply _ Age in years Does not apply___ Aged stopped____ Check if still smoking Does not apply ___ Cigarettes per day _ Does not apply ___ Cigarettes per day _ Does not apply ___ 1. Does not apply _ 2. Not at all 3. Slightly 4. Moderately ____ 5. Deeply_____ 1. Yes2. No FOR PERSONS WHO HAVE EVER SMOKED A PIPE B.1. How old were you when you started to smoke a pipe regularly? Age __ Part I-1, Page 71 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07741 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite 2. If you have stopped smoking a pipe completely, how old were you when you stopped? C. On the average over the entire time you smoked a pipe, how much pipe tobacco did you smoke per week? How much pipe tobacco are you smoking now? E. Do you or did you inhale the pipe smoke? 41A. Have you ever smoked cigars regularly? (Yes means more than 1 cigar a week for a year.) If yes to 41 A: Age stopped Check if still smoking pipe Does not apply_____ oz. per week (a standard pouch of tobacco contains 1-1/2 ounces) _____ Does not apply oz. per week Not currently smoking a pipe 1. Never smoked____ 2. Not at all 3. Slightly_____ 4. Moderately_____ 5. Deeply_____ 1. Yes2. No __ FOR PERSONS WHO HAVE EVER SMOKED CIGARS B.1. How old were you when you started Age smoking cigars regularly? 2. If you have stopped smoking cigars Age stopped ___ completely, how old were you when Check if still you stopped? smoking cigars _ Does not apply _ C. On the average over the entire time you Cigars per week smoked cigars, how many cigars did you Does not apply _ smoke per week? D. How many cigars are you Cigars per week smoking per week now? Check if not smoking cigars currently E. Do you or did you inhale 1. Never smoked the cigar smoke? 2. Not at all ____ 3. Slightly 4. Moderately __ 5. Deeply Signature Date PART 2 PERIODIC MEDICAL QUESTIONNAIRE 1. NAME___________________________________________ 2. SOCIAL SECURITY #................................................. 12 3 4 5 6 7 8 9 3. CLOCK NUMBER ................................. 10 11 12 13 14 15 4. PRESENT OCCUPATION_________________________ 5. PLANT__________________________________________ Part I-1, Page 72 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07741 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite 6. ADDRESS 7. 8. TELEPHONE NUMBER 9. INTERVIEWER 10. DATE.................................... 11. What is your marital status? ................................. 16 17 18 19 20 21 1. Single 2. Married_____ Divorced 3. Widowed (Zip Code) 4.Separated/ 12. OCCUPATIONAL HISTORY 12A. Have you ever worked full time (30 hours per week or more) for 6 months or more? If yes to 12A: 12 B. In the past, did you work in a dusty job? 12 C Was dust exposure: 12 D In the past, were you exposed to gas or chemical fumes in your work? 12 E Was exposure 12 F. In the past year, what was your: 13. RECENT MEDICAL HISTORY 13A. Do you consider yourself to be in good health? If no, state reason____________ 13B. In the past year, have you developed: 1. Yes2. No 1. Yes2. No 3. Does not apply_____ 1. Mild2. Moderate3. Severe 1. Yes2. No 1. Mild2. Moderate3. Severe 1. Job occupation?_____________________ 2. Position/job title?____________________ Yes_____ No Yes_____ No Epilepsy? Rheumatic fever? Kidney disease?_____ Bladder disease? Diabetes?Jaundice? Cancer? 14. CHEST COLDS AND CHEST ILLNESS 14A. If you get a cold, does it usually go to your chest? (Usually means 1. Yes2. No more than 1/2 the time.) 3. Don't get colds _ 15A. During the past year, have you had any chest illnesses that have 1. Yes 2. No kept you off work, indoors at home 3. Does not apply _ or in bed? If yes to 15a: 15B. Did you produce phlegm with any 1. Yes2. No of these chest illnesses? 3. Does not apply _ 15C. In the past year, how many such Number of illnesses illnesses with (increased) phlegm No such illnesses did you have which lasted a week or more? Part I-1, Page 73 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07741 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite 16. RESPIRATORY SYSTEM In the past year have you had: Yes or No Further Comment on Positive Answers Asthma _____ Bronchitis _____ Hay fever _____ Other allergies _____ Pneumonia Chest surgery Problems Yes or No _____ _____ _____ Tuberculosis Other lung Heart disease Further Comment on Positive Answers _____ _____ _____ Do you have: Frequent colds Shortness of breath when walking or climbing one flight of stairs Do you: Wheeze Smoke cigarettes_____ Yes or No _____ Chronic cough Further Comment on Positive Answers _____ _____ Cough up phlegm _____ Packs per day_____ How many years DateSignature [Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07741, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 87-24-051 (Order 87-24), 296-62-07741, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62-07741, filed 4/27/87.] WAC 296-62-07743 Appendix E--Interpretation and classification of chest roentgenograms-Mandatory. (1) Chest roentgenograms shall be interpreted and classified in accordance with a professionally accepted classification system and recorded on an interpretation form following the format of the CDC/NIOSH (M) 2.8 form. As a minimum, the content within the bold lines of this form (items one through four) shall be included. This form is not to be submitted to NIOSH. (2) Roentgenograms shall be interpreted and classified only by a B-reader, a board eligible/certified radiologist, or an experienced physician with known expertise in pneumoconioses. (3) All interpreters, whenever interpreting chest roentgenograms made under this section, shall have immediately available for reference a complete set of the ILO-U/C International Classification of Radiographs for Pneumoconioses, 1980. [Statutory Authority: Chapter 49.17 RCW. 87-24-051 (Order 87-24), 296-62-07743, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62-07743, filed 4/27/87.] WAC 296-62-07745 Appendix F--Work practices and engineering controls for automotive brake and clutch inspection, disassembly, repair and assembly--Mandatory. This mandatory appendix specifies engineering controls and work practices that must be implemented by the employer during automotive brake and clutch inspection, disassembly, repair, and assembly operations. Proper use of these engineering controls and work practices will reduce employees' asbestos exposure below the permissible exposure level during clutch and brake inspection, disassembly, repair, and assembly operations. The employer shall institute engineering controls and work practices using either the method set forth in (1) or (2) of this appendix, or any other method which the Part I-1, Page 74 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07745 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite employer can demonstrate to be equivalent in terms of reducing employee exposure to asbestos as defined and which meets the requirements described in (3) of this appendix, for those facilities in which no more than 5 pairs of brakes or 5 clutches are inspected, disassembled, reassembled and/or repaired per week, the method set forth in (4) of this appendix may be used: (1) Negative pressure enclosure/HEPA vacuum system method. (a) The brake and clutch inspection, disassembly, repair, and assembly operations shall be enclosed to cover and contain the clutch or brake assembly and to prevent the release of asbestos fibers into the worker's breathing zone. (b) The enclosure shall be sealed tightly and thoroughly inspected for leaks before work begins on brake and clutch inspection, disassembly, repair and assembly. (c) The enclosure shall be such that the worker can clearly see the operation and shall provide impermeable sleeves through which the worker can handle the brake and clutch inspection, disassembly, repair and assembly. The integrity of the sleeves and ports shall be examined before work begins. (d) A HEPA-filtered vacuum shall be employed to maintain the enclosure under negative pressure throughout the operation. Compressed-air may be used to remove asbestos fibers or particles from the enclosure. (e) The HEPA vacuum shall be used first to loosen the asbestos containing residue from the brake and clutch parts and then to evacuate the loosened asbestos containing material from the enclosure and capture the material in the vacuum filter. (f) The vacuum's filter, when full, shall be first wetted with a fine mist of water, then removed and placed immediately in an impermeable container, labeled according to WAC 296-62-07721 (6) and disposed of according to WAC 296-62-07723. (g) Any spills or releases of asbestos containing waste material from inside of the enclosure or vacuum hose or vacuum filter shall be immediately cleaned up and disposed of according to WAC 296-62-07723. (2) Low pressure/wet cleaning method. (a) A catch basin shall be placed under the brake assembly, positioned to avoid splashes and spills. (b) The reservoir shall contain water containing an organic solvent or wetting agent. The flow of liquid shall be controlled such that the brake assembly is gently flooded to prevent the asbestoscontaining brake dust from becoming airborne. (c) The aqueous solution shall be allowed to flow between the brake drum and brake support before the drum is removed. (d) After removing the brake drum, the wheel hub and back of the brake assembly shall be thoroughly wetted to suppress dust. Part I-1, Page 75 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07745 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (e) The brake support plate, brake shoes and brake components used to attach the brake shoes shall be thoroughly washed before removing the old shoes. (f In systems using filters, the filters, when full, shall be first wetted with a fine mist of water, then removed and placed immediately in an impermeable container, labeled according to WAC 296 62-07721 (6) and disposed of according to WAC 296-62-07723. (g) Any spills of asbestos-containing aqueous solution or any asbestos-containing waste material shall be cleaned up immediately and disposed of according to WAC 296-62-07723. (h) The use of dry brushing during low pressure/wet cleaning operations is prohibited. (3) Equivalent methods. An equivalent method is one which has sufficient written detail so that it can be reproduced and has been demonstrated that the exposures resulting from the equivalent method are equal to or less than the exposure which would result from the use of the method described in subsection (1) of this appendix. For purposes of making this comparison, the employer shall assume that exposures resulting from the use of the method described in subsection (1) of this appendix shall not exceed 0.016 f/cc, as measured by the WISHA reference method and as averaged over at least 18 personal samples. (4) Wet method. (a) A spray bottle, hose nozzle, or other implement capable of delivering a fine mist of water or amended water or other delivery system capable of delivering water at low pressure, shall be used to first thoroughly wet the brake and clutch parts. Brake and clutch components shall then be wiped clean with a cloth. (b) The cloth shall be placed in an impermeable container, labeled according to WAC 296-62-07721 (6) and then disposed of according to WAC 296-62-07723, or the cloth shall be laundered in a way to prevent the release of asbestos fibers in excess of 0.1 fiber per cubic centimeter of air. (c) Any spills of solvent or any asbestos containing waste material shall be cleaned up immediately according to WAC 296-62-07723. (d) The use of dry brushing during the wet method operations is prohibited. [Statutory Authority: RCW 49.17.010, .040, .050 and RCW 49.26.130. 00-06-075 (Order 99-40), 296-62-07745, filed 03/01/00, effective 04/10/00. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07745, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 89-11-035 (Order 89-03), 296-62-07745, filed 5/15/89, effective 6/30/89; 87-24-051 (Order 87-24), 296-62-07745, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296-62-07745, filed 4/27/87.] WAC 296-62-07747 Appendix G--Substance technical information for asbestos--Nonmandatory. (1) Substance identification. (a) Substance: "Asbestos" is the name of a class of magnesium-silicate minerals that occur in fibrous form. Minerals that are included in this group are chrysotile, crocidolite, amosite, tremolite asbestos, anthophyllite asbestos, and actinolite asbestos. (b) Asbestos is used in the manufacture of heat-resistant clothing, automotive brake and clutch linings, and a variety of building materials including floor tiles, roofing felts, ceiling tiles, asbestos-cement pipe and sheet, and fire-resistant drywall. Asbestos is also present in pipe and boiler insulation materials, and in sprayed-on materials located on beams, in crawlspaces, and between walls. Part I-1, Page 76 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07747 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (c) The potential for a product containing asbestos, tremolite, anthophyllite, and actinolite to release breathable fibers depends on its degree of friability. Friable means that the material can be crumbled with hand pressure and is therefore likely to emit fibers. The fibrous or fluffy sprayedon materials used for fireproofing, insulation, or sound proofing are considered to be friable, and they readily release airborne fibers if disturbed. Materials such as vinyl-asbestos floor tile or roofing felts are considered nonfriable and generally do not emit airborne fibers unless subjected to sanding or sawing operations. Asbestos-cement pipe or sheet can emit airborne fibers if the materials are cut or sawed, or if they are broken during demolition operations. (d) Permissible exposure: Exposure to airborne asbestos fibers may not exceed 0.1 fiber per cubic centimeter of air (0.1 f/cc) averaged over the eight-hour workday (time weighted average), or 1 fiber per cubic centimeter of air (1 f/cc) during any thirty minute period, (excursion limit). (2) Health hazard data. (a) Asbestos can cause disabling respiratory disease and various types of cancers if the fibers are inhaled. Inhaling or ingesting fibers from contaminated clothing or skin can also result in these diseases. The symptoms of these diseases generally do not appear for twenty or more years after initial exposure. (b) Exposure to asbestos has been shown to cause lung cancer, mesothelioma, and cancer of the stomach and colon. Mesothelioma is a rear cancer of the thin membrane lining of the chest and abdomen. Symptoms of mesothelioma include shortness of breath, pain in the walls of the chest, and/or abdominal pain. (3) Respirators and protective clothing. (a) Respirators: You are required to wear a respirator when performing tasks that result in asbestos exposure that exceeds 0.1 fiber per cubic centimeter of air (0.1 f/cc) as an eight-hour time weighted average and/or 1.0 fiber per cubic centimeter (1 f/cc) during any thirty minute period (excursion limit). These conditions can occur while your employer is in the process of installing engineering controls to reduce asbestos exposure, or where engineering controls are not feasible to reduce asbestos exposure. Air-purifying respirators equipped with a high-efficiency particulate air (HEPA) filter can be used where airborne asbestos fiber concentrations do not exceed 1 f/cc; otherwise, air-supplied, positive-pressure, full facepiece respirators must be used. Disposable respirators or dust masks are not permitted to be used for asbestos work. For effective protection, respirators must fit your face and head snugly. Your employer is required to conduct fit tests when you are first assigned a respirator and every six months thereafter. Respirators should not be loosened or removed in work situations where their use is required. (b) Protective clothing: You are required to wear protective clothing in work areas where asbestos fiber concentrations exceed the permissible exposure limits to prevent contamination of the skin. Where protective clothing is required, your employer must provide you with clean garments. Unless you are working on a large asbestos removal or demolition project, your employer must also provide a change room and separate lockers for your street clothes and contaminated work clothes. If you are working on a large asbestos removal or demolition project, and where it is feasible to do so, your employer must provide a clean room, shower, and decontamination room contiguous to the work area. When leaving the work area, you must remove contaminated clothing before proceeding to the shower. If the shower is not adjacent to the work area, you must vacuum your clothing before proceeding to the change room and shower. To prevent inhaling fibers in contaminated change rooms and showers, leave your respirator on until you leave the shower and enter the clean change room. Part I-1, Page 77 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07747 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (4) Disposal procedures and cleanup. (a) Wastes that are generated by processes where asbestos is present include: (i) Empty asbestos shipping containers. (ii) Process wastes such as cuttings, trimmings, or reject material. (iii) Housekeeping waste from sweeping or HEPA vacuuming. (iv) Asbestos fireproofing or insulating material that is removed from buildings. (v) Building products that contain asbestos removed during building renovation or demolition. (vi) Contaminated disposable protective clothing. (b) Empty shipping bags can be flattened under exhaust hoods and packed into airtight containers for disposal. Empty shipping drums are difficult to clean and should be sealed. (c) Vacuum bags or disposable paper filters should not be cleaned, but should be sprayed with a fine water mist and placed into a labeled waste container. (d) Process waste and housekeeping waste should be wetted with water or a mixture of water and surfactant prior to packaging in disposable containers. (e) Material containing asbestos that is removed from buildings must be disposed of in leaktight 6-mil thick plastic bags, plastic-lined cardboard containers, or plastic-lined metal containers. These wastes, which are removed while wet, should be sealed in containers before they dry out to minimize the release of asbestos fibers during handling. (5) Access to information. (a) Each year, your employer is required to inform you of the information contained in this standard and appendices for asbestos. In addition, your employer must instruct you in the proper work practices for handling materials containing asbestos and the correct use of protective equipment. (b) Your employer is required to determine whether you are being exposed to asbestos. You or your representative has the right to observe employee measurements and to record the results obtained. Your employer is required to inform you of your exposure, and, if you are exposed above the permissible limits, he or she is required to inform you of the actions that are being taken to reduce your exposure to within the permissible limits. (c) Your employer is required to keep records of your exposures and medical examinations. These exposure records must be kept for at least thirty years. Medical records must be kept for the period of your employment plus thirty years. (d) Your employer is required to release your exposure and medical records to your physician or designated representative upon your written request. [Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07747, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 89-11-035 (Order 89-03), 296-62-07747, filed 5/15/89, effective 6/30/89; 87-24-051 (Order 87-24), 296-62-07747, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296 62-07747, filed 4/27/87.] Part I-1, Page 78 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite WAC 296-62-07749 Appendix H--Medical surveillance guidelines for asbestos--Nonmandatory. (1) Route of entry inhalation, ingestion. (2) Toxicology. Clinical evidence of the adverse effects associated with exposure to asbestos is present in the form of several well-conducted epidemiological studies of occupationally exposed workers, family contacts of workers, and persons living near asbestos mines. These studies have shown a definite association between exposure to asbestos and an increased incidence of lung cancer, pleural and peretoneal mesothelioma, gastrointestinal cancer, and asbestosis. The latter is a disabling fibrotic lung disease that is caused only by exposure to asbestos. Exposure to asbestos has also been associated with an increased incidence of esophageal, kidney, laryngeal, pharyngeal, and buccal cavity cancers. As with other known chronic occupational diseases, disease associated with asbestos generally appears about twenty years following the first occurrence of exposure: There are no known acute effects associated with exposure to asbestos. Epidemiological studies indicate that the risk of lung cancer among exposed workers who smoke cigarettes is greatly increased over the risk of lung cancer among nonexposed smokers or exposed nonsmokers. These studies suggest that cessation of smoking will reduce the risk of lung cancer for a person exposed to asbestos but will not reduce it to the same level of risk as that existing for an exposed worker who has never smoked. (3) Signs and symptoms of exposure-related disease. The signs and symptoms of lung cancer or gastrointestinal cancer induced by exposure to asbestos are not unique, except that a chest x-ray of an exposed patient with lung cancer may show pleural plaques, pleural calcification, or pleural fibrosis. Symptoms characteristic of mesothelioma include shortness of breath, pain in the walls of the chest, or abdominal pain. Mesothelioma has a much longer latency period compared with lung cancer (forty years versus fifteen to twenty years), and mesothelioma is therefore more likely to be found among workers who were first exposed to asbestos at an early age. Mesothelioma is always fatal. Asbestosis is pulmonary fibrosis caused by the accumulation of asbestos fibers in the lungs. Symptoms include shortness of breath, coughing, fatigue, and vague feelings of sickness. When the fibrosis worsens, shortness of breath occurs even at rest. The diagnosis of asbestosis is based on a history of exposure to asbestos, the presence of characteristic radiologic changes, endinspiratory crackles (rales), and other clinical features of fibrosing lung disease. Pleural plaques and thickening are observed on x-rays taken during the early stages of the disease. Asbestosis is often a progressive disease even in the absence of continued exposure, although this appears to be a highly individualized characteristic. In severe cases, death may be caused by respiratory or cardiac failure. (4) Surveillance and preventive considerations. As noted above, exposure to asbestos has been linked to an increased risk of lung cancer, mesothelioma, gastrointestinal cancer, and asbestosis among occupationally exposed workers. Adequate screening tests to determine an employee's potential for developing serious chronic diseases, such as cancer, from exposure to asbestos do not presently exist. However, some tests, particularly chest x-rays and pulmonary function tests, may indicate that an employee has been overexposed to asbestos increasing his or her risk of developing exposure-related chronic diseases. It is important for the physician to become familiar with the operating conditions in which occupational exposure to asbestos is likely to occur. This is particularly important in evaluating medical and work histories and in conducting physical examinations. When an active employee has been identified as having been overexposed to asbestos measures taken by the employer to eliminate or mitigate further exposure should also lower the risk of serious long-term consequences. Part I-1, Page 79 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07749 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite The employer is required to institute a medical surveillance program for all employees who are or will be exposed to asbestos at or above the permissible exposure limits (0.1 fiber per cubic centimeter of air) for 30 or more days per year and for all employees who are assigned to wear a negative pressure respirator. All examinations and procedures must be performed by or under the supervision of a licensed physician, at a reasonable time and place, and at no cost to the employee. Although broad latitude is given to the physician in prescribing specific tests to be included in the medical surveillance program, WISHA requires inclusion of the following elements in the routine examination: (a) Medical and work histories with special emphasis directed to symptoms of the respiratory system, cardiovascular system, and digestive tract. (b) Completion of the respiratory disease questionnaire contained in WAC 296-62-07741, Appendix D. (c) A physical examination including a chest roentgenogram and pulmonary function test that includes measurement of the employee's forced vital capacity (FVC) and forced expiratory volume at one second (FEV1). (d) Any laboratory or other test that the examining physician deems by sound medical practice to be necessary. The employer is required to make the prescribed tests available at least annually to those employees covered; more often than specified if recommended by the examining physician; and upon termination of employment. The employer is required to provide the physician with the following information: A copy of this standard and appendices; a description of the employee's duties as they relate to asbestos exposure; the employee's representative level of exposure to asbestos; a description of any personal protective and respiratory equipment used; and information from previous medical examinations of the affected employee that is not otherwise available to the physician. Making this information available to the physician will aid in the evaluation of the employee's health in relation to assigned duties and fitness to wear personal protective equipment, if required. The employer is required to obtain a written opinion from the examining physician containing the results of the medical examination; the physician's opinion as to whether the employee has any detected medical conditions that would place the employee at an increased risk of exposure-related disease; any recommended limitations on the employee or on the use of personal protective equipment; and a statement that the employee has been informed by the physician of the results of the medical examination and of any medical conditions related to asbestos exposure that require further explanation or treatment. This written opinion must not reveal specific findings or diagnoses unrelated to exposure to asbestos and a copy of the opinion must be provided to the affected employee. [Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07749, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 94-15-096 (Order 94-07), 296-62-07749, filed 7/20/94, effective 9/20/94; 87-24-051 (Order 87-24), 296-62-07749, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), 296 62-07749, filed 4/27/87.] WAC 296-62-07751 Appendix I--Work practices and engineering controls for Class I asbestos operations--Nonmandatory. This is a nonmandatory appendix to the asbestos standards for construction and for shipyards. It describes criteria and procedures for erecting and using negative pressure enclosures for Class I Asbestos Work, when NPEs are used as an allowable control method to comply with WAC 296-62-07712 (7)(a). Many small and variable details are involved in the erection of a negative pressure enclosure. OSHA and most participants in the rulemaking agreed that only the major, more performance oriented criteria should be made mandatory. These criteria are set out in WAC 296-62-07712. Part I-1, Page 80 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07751 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite In addition, this appendix includes these mandatory specifications and procedures in its guidelines in order to make this appendix coherent and helpful. The mandatory nature of the criteria which appear in the regulatory text is not changed because they are included in this "nonmandatory" appendix. Similarly, the additional criteria and procedures included as guidelines in the appendix, do not become mandatory because mandatory criteria are also included in these comprehensive guidelines. In addition, none of the criteria, both mandatory and recommended, are meant to specify or imply the need for use of patented or licensed methods or equipment. Recommended specifications included in this attachment should not discourage the use of creative alternatives which can be shown to reliably achieve the objectives of negativepressure enclosures. Requirements included in this appendix, cover general provisions to be followed in all asbestos jobs, provisions which must be followed for all Class I asbestos jobs, and provisions governing the construction and testing of negative pressure enclosures. The first category includes the requirement for use of wet methods, HEPA vacuums, and immediate bagging of waste; Class I work must conform to the following provisions: - oversight by competent person - use of critical barriers over all openings to work area - isolation of HVAC systems - use of impermeable dropcloths and coverage of all objects within regulated areas In addition, more specific requirements for NPEs include: - maintenance of -0.02 inches water gauge within enclosure - manometric measurements - air movement away from employees performing removal work - smoke testing or equivalent for detection of leaks and air direction - deactivation of electrical circuits, if not provided with ground-fault circuit interrupters. Planning the Project The standard requires that an exposure assessment be conducted before the asbestos job is begun WAC 296-62-07709(3). Information needed for that assessment, includes data relating to prior similar jobs, as applied to the specific variables of the current job. The information needed to conduct the assessment will be useful in planning the project, and in complying with any reporting requirements under this standard, when significant changes are being made to a control system listed in the standard, (see WAC 296-62 07719), as well as those of USEPA (40 CFR Part 61, subpart M). Thus, although the standard does not explicitly require the preparation of a written asbestos removal plan, the usual constituents of such a plan, i.e., a description of the enclosure, the equipment, and the procedures to be used throughout the project, must be determined before the enclosure can be erected. The following information should be included in the planning of the system: A physical description of the work area; A description of the approximate amount of material to be removed; Part I-1, Page 81 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07751 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite A schedule for turning off and sealing existing ventilation systems; Personnel hygiene procedures; A description of personal protective equipment and clothing to be worn by employees; A description of the local exhaust ventilation systems to be used and how they are to be tested; A description of work practices to be observed by employees; An air monitoring plan; A description of the method to be used to transport waste material; and The location of the dump site. Materials and Equipment Necessary for Asbestos Removal Although individual asbestos removal projects vary in terms of the equipment required to accomplish the removal of the materials, some equipment and materials are common to most asbestos removal operations. Plastic sheeting used to protect horizontal surfaces, seal HVAC openings or to seal vertical openings and ceilings should have a minimum thickness of 6 mils. Tape or other adhesive used to attach plastic sheeting should be of sufficient adhesive strength to support the weight of the material plus all stresses encountered during the entire duration of the project without becoming detached from the surface. Other equipment and materials which should be available at the beginning of each project are: - HEPA Filtered Vacuum is essential for cleaning the work area after the asbestos has been removed. It should have a long hose capable of reaching out-of-the-way places, such as areas above ceiling tiles, behind pipes, etc. - Portable air ventilation systems installed to provide the negative air pressure and air removal from the enclosure must be equipped with a HEPA filter. The number and capacity of units required to ventilate an enclosure depend on the size of the area to be ventilated. The filters for these systems should be designed in such a manner that they can be replaced when the air flow volume is reduced by the build-up of dust in the filtration material. Pressure monitoring devices with alarms and strip chart recorders attached to each system to indicate the pressure differential and the loss due to dust buildup on the filter are recommended. - Water sprayers should be used to keep the asbestos material as saturated as possible during removal; the sprayers will provide a fine mist that minimizes the impact of the spray on the material. - Water used to saturate the asbestos containing material can be amended by adding at least 15 milliliters (0.5 ounce) of wetting agent in 1 liter (1 pint) of water. An example of a wetting agent is a 50/50 mixture of polyoxyethylene ether and polyoxyethylene polyglycol ester. - Backup power supplies are recommended, especially for ventilation systems. - Shower and bath water should be with mixed hot and cold water faucets. Water that has been used to clean personnel or equipment should either be filtered or be collected and discarded as asbestos waste. Soap and shampoo should be provided to aid in removing dust from the workers' skin and hair. Part I-1, Page 82 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07751 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite - See WAC 296-62-07715 and 296-62-07717 for appropriate respiratory protection and protective clothing. - See WAC 296-62-07721 for required signs and labels. Preparing the Work Area Disabling HVAC Systems: The power to the heating, ventilation, and air conditioning systems that service the restricted area must be deactivated and locked off. All ducts, grills, access ports, windows and vents must be sealed off with two layers of plastic to prevent entrainment of contaminated air. Operating HVAC Systems in the Restricted Area: If components of a HVAC system located in the restricted area are connected to a system that will service another zone during the project, the portion of the duct in the restricted area must be sealed and pressurized. Necessary precautions include caulking the duct joints, covering all cracks and openings with two layers of sheeting, and pressurizing the duct throughout the duration of the project by restricting the return air flow. The power to the fan supplying the positive pressure should be locked "on" to prevent pressure loss. Sealing Elevators: If an elevator shaft is located in the restricted area, it should be either shut down or isolated by sealing with two layers of plastic sheeting. The sheeting should provide enough slack to accommodate the pressure changes in the shaft without breaking the air-tight seal. Removing Mobile Objects: All movable objects should be cleaned and removed from the work area before an enclosure is constructed unless moving the objects creates a hazard. Mobile objects will be assumed to be contaminated and should be either cleaned with amended water and a HEPA vacuum and then removed from the area or wrapped and then disposed of as hazardous waste. Cleaning and Sealing Surfaces: After cleaning with water and a HEPA vacuum, surfaces of stationary objects should be covered with two layers of plastic sheeting. The sheeting should be secured with duct tape or an equivalent method to provide a tight seal around the object. Bagging Waste: In addition to the requirement for immediate bagging of waste for disposal, it is further recommended that the waste material be double-bagged and sealed in plastic bags designed for asbestos disposal. The bags should be stored in a waste storage area that can be controlled by the workers conducting the removal. Filters removed from air handling units and rubbish removed from the area are to be bagged and handled as hazardous waste. Constructing the Enclosure The enclosure should be constructed to provide an air-tight seal around ducts and openings into existing ventilation systems and around penetrations for electrical conduits, telephone wires, water lines, drain pipes, etc. Enclosures should be both airtight and watertight except for those openings designed to provide entry and/or air flow control. Size: An enclosure should be the minimum volume to encompass all of the working surfaces yet allow unencumbered movement by the worker(s), provide unrestricted air flow past the worker(s), and ensure walking surfaces can be kept free of tripping hazards. Shape: The enclosure may be any shape that optimizes the flow of ventilation air past the worker(s). Part I-1, Page 83 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07751 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite Structural Integrity: The walls, ceilings and floors must be supported in such a manner that portions of the enclosure will not fall down during normal use. Openings: It is not necessary that the structure be airtight; openings may be designed to direct air flow. Such openings should be located at a distance from active removal operations. They should be designed to draw air into the enclosure under all anticipated circumstances. In the event that negative pressure is lost, they should be fitted with either HEPA filters to trap dust or automatic trap doors that prevent dust from escaping the enclosure. Openings for exits should be controlled by an airlock or a vestibule. Barrier Supports: Frames should be constructed to support all unsupported spans of sheeting. Sheeting: Walls, barriers, ceilings, and floors should be lined with two layers of plastic sheeting having a thickness of at least 6 mil. Seams: Seams in the sheeting material should be minimized to reduce the possibilities of accidental rips and tears in the adhesive or connections. All seams in the sheeting should overlap, be staggered and not be located at corners or wall-to-floor joints. Areas Within an Enclosure: Each enclosure consists of a work area, a decontamination area, and waste storage area. The work area where the asbestos removal operations occur should be separated from both the waste storage area and the contamination control area by physical curtains, doors, and/or airflow patterns that force any airborne contamination back into the work area. See WAC 296-62-07719 for requirements for hygiene facilities. During egress from the work area, each worker should step into the equipment room, clean tools and equipment, and remove gross contamination from clothing by wet cleaning and HEPA vacuuming. Before entering the shower area, foot coverings, head coverings, hand coverings, and coveralls are removed and placed in impervious bags for disposal or cleaning. Airline connections from airline respirators with HEPA disconnects and power cables from powered air-purifying respirators (PAPRs) will be disconnected just prior to entering the shower room. Establishing Negative Pressure Within the Enclosure Negative Pressure: Air is to be drawn into the enclosure under all anticipated conditions and exhausted through a HEPA filter for 24 hours a day during the entire duration of the project. Air Flow Tests: Air flow patterns will be checked before removal operations begin, at least once per operating shift and any time there is a question regarding the integrity of the enclosure. The primary test for air flow is to trace air currents with smoke tubes or other visual methods. Flow checks are made at each opening and at each doorway to demonstrate that air is being drawn into the enclosure and at each worker's position to show that air is being drawn away from the breathing zone. Monitoring Pressure Within the Enclosure: After the initial air flow patterns have been checked, the static pressure must be monitored within the enclosure. Monitoring may be made using manometers, pressure gauges, or combinations of these devices. It is recommended that they be attached to alarms and strip chart recorders at points identified by the design engineer. Corrective Actions: If the manometers or pressure gauges demonstrate a reduction in pressure differential below the required level, work should cease and the reason for the change investigated and appropriate changes made. The air flow patterns should be retested before work begins again. Part I-1, Page 84 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07751 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite Pressure Differential: The design parameters for static pressure differentials between the inside and outside of enclosures typically range from 0.02 to 0.10 inches of water gauge, depending on conditions. All zones inside the enclosure must have less pressure than the ambient pressure outside of the enclosure ( 0.02 inches water gauge differential). Design specifications for the differential vary according to the size, configuration, and shape of the enclosure as well as ambient and mechanical air pressure conditions around the enclosure. Air Flow Patterns: The flow of air past each worker shall be enhanced by positioning the intakes and exhaust ports to remove contaminated air from the worker's breathing zone, by positioning HEPA vacuum cleaners to draw air from the worker's breathing zone, by forcing relatively uncontaminated air past the worker toward an exhaust port, or by using a combination of methods to reduce the worker's exposure. Air Handling Unit Exhaust: The exhaust plume from air handling units should be located away from adjacent personnel and intakes for HVAC systems. Air Flow Volume: The air flow volume (cubic meters per minute) exhausted (removed) from the workplace must exceed the amount of makeup air supplied to the enclosure. The rate of air exhausted from the enclosure should be designed to maintain a negative pressure in the enclosure and air movement past each worker. The volume of air flow removed from the enclosure should replace the volume of the container at every 5 to 15 minutes. Air flow volume will need to be relatively high for large enclosures, enclosures with awkward shapes, enclosures with multiple openings, and operations employing several workers in the enclosure. Air Flow Velocity: At each opening, the air flow velocity must visibly "drag" air into the enclosure. The velocity of air flow within the enclosure must be adequate to remove airborne contamination from each worker's breathing zone without disturbing the asbestos-containing material on surfaces. Airlocks: Airlocks are mechanisms on doors and curtains that control the air flow patterns in the doorways. If air flow occurs, the patterns through doorways must be such that the air flows toward the inside of the enclosure. Sometimes vestibules, double doors, or double curtains are used to prevent air movement through the doorways. To use a vestibule, a worker enters a chamber by opening the door or curtain and then closing the entry before opening the exit door or curtain. Airlocks should be located between the equipment room and shower room, between the shower room and the clean room, and between the waste storage area and the outside of the enclosure. The air flow between adjacent rooms must be checked using smoke tubes or other visual tests to ensure the flow patterns draw air toward the work area without producing eddies. Monitoring for Airborne Concentrations In addition to the breathing zone samples taken as outlined in WAC 296-62-07709, samples of air should be taken to demonstrate the integrity of the enclosure, the cleanliness of the clean room and shower area, and the effectiveness of the HEPA filter. If the clean room is shown to be contaminated, the room must be relocated to an uncontaminated area. Samples taken near the exhaust of portable ventilation systems must be done with care. General Work Practices Preventing dust dispersion is the primary means of controlling the spread of asbestos within the enclosure. Whenever practical, the point of removal should be isolated, enclosed, covered, or shielded from the workers in the area. Waste asbestos containing materials must be bagged during or immediately after removal; the material must remain saturated until the waste container is sealed. Part I-1, Page 85 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07751 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite Waste material with sharp points or corners must be placed in hard air-tight containers rather than bags. Whenever possible, large components should be sealed in plastic sheeting and removed intact. Bags or containers of waste will be moved to the waste holding area, washed, and wrapped in a bag with the appropriate labels. Cleaning the Work Area Surfaces within the work area should be kept free of visible dust and debris to the extent feasible. Whenever visible dust appears on surfaces, the surfaces within the enclosure must be cleaned by wiping with a wet sponge, brush, or cloth and then vacuumed with a HEPA vacuum. All surfaces within the enclosure should be cleaned before the exhaust ventilation system is deactivated and the enclosure is disassembled. An approved encapsulant may be sprayed onto areas after the visible dust has been removed. [Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07751, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 94-15-096 (Order 94-07), 296-62-07751, filed 7/20/94, effective 9/20/94; 87-24-051 (Order 87-24), 296-62-07751, filed 11/30/87.] WAC 296-62-07753 Appendix J--Polarized light microscopy of asbestos--Nonmandatory. Method number: ID-191 Matrix: Bulk Collection Procedure Collect approximately 1 to 2 grams of each type of material and place into separate 20 mL scintillation vials. Analytical Procedure A portion of each separate phase is analyzed by gross examination, phase-polar examination, and central stop dispersion microscopy. Commercial manufacturers and products mentioned in this method are for descriptive use only and do not constitute endorsements by USDOL-WISHA. Similar products from other sources may be substituted. (1) Introduction This method describes the collection and analysis of asbestos bulk materials by light microscopy techniques including phase- polar illumination and central-stop dispersion microscopy. Some terms unique to asbestos analysis are defined below: Amphibole: A family of minerals whose crystals are formed by long, thin units which have two thin ribbons of double chain silicate with a brucite ribbon in between. The shape of each unit is similar to an "I beam." Minerals important in asbestos analysis include cummingtonite-grunerite, crocidolite, tremoliteactinolite and anthophyllite. Asbestos: A term for naturally occurring fibrous minerals. Asbestos includes chrysotile, cummingtonitegrunerite asbestos (amosite), anthophyllite asbestos, tremolite asbestos, crocidolite, actinolite asbestos and any of these minerals which have been chemically treated or altered. The precise chemical formulation of each species varies with the location from which it was mined. Nominal compositions are listed: Part I-1, Page 86 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite Chrysotile Mg3Si2O5(OH)4 Crocidolite (Riebeckite asbestos) Na2Fe32+Fe23+Si8O22(OH)2 Cummingtonite-Grunerite asbestos (Amosite) (Mg,Fe)7Si8O22(OH)2 Tremolite-Actinolite asbestos Ca2(Mg,Fe)5Si8O22(OH)2 Anthophyllite asbestos (Mg,Fe)7Si8O22(HO)2 Asbestos Fiber: A fiber of asbestos meeting the criteria for a fiber. (See section (3)(e)) Aspect Ratio: The ratio of the length of a fiber to its diameter usually defined as "length: width", e.g. 3:1. Brucite: A sheet mineral with the composition mg(OH)2. Central Stop Dispersion Staining (microscope): This is a dark field microscope technique that images particles using only light refracted by the particle, excluding light that travels through the particle unrefracted. This is usually accomplished with a McCrone objective or other arrangement which places a circular stop with apparent aperture equal to the objective aperture in the back focal plane of the microscope. Cleavage Fragments: Mineral particles formed by the comminution of minerals, especially those characterized by relatively parallel sides and moderate aspect ratio. Differential Counting: The term applied to the practice of excluding certain kinds of fibers from a phase contrast asbestos count because they are not asbestos. Fiber: A particle longer than or equal to 5 microns with a length to width ratio greater than or equal to 3:1. This may include cleavage fragments. (See section (3)(e) of this appendix). Phase Contrast: Contrast obtained in the microscope by causing light scattered by small particles to destructively interfere with unscattered light, thereby enhancing the visibility of very small particles and particles with very low intrinsic contrast. Phase Contrast Microscope: A microscope configured with a phase mask pair to create phase contrast. The technique which uses this is called Phase Contrast Microscopy (PCM). Phase-Polar Analysis: This is the use of polarized light in a phase contrast microscope. It is used to see the same size fibers that are visible in air filter analysis. Although fibers finer than 1 micron are visible, analysis of these is inferred from analysis of larger bundles that are usually present. Phase-Polar Microscope: The phase-polar microscope is a phase contrast microscope which has an analyzer, a polarizer, a first order red plate and a rotating phase condenser all in place so that the polarized light image is enhanced by phase contrast. Sealing Encapsulant: This is a product which can be applied, preferably by spraying, onto an asbestos surface which will seal the surface so that fibers cannot be released. Serpentine: A mineral family consisting of minerals with the general composition Mg3(Si2O5(OH)4 having the magnesium in brucite layer over a silicate layer. Minerals important in asbestos analysis included in this family are chrysotile, lizardite, antigorite. Part I-1, Page 87 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (a) History Light microscopy has been used for well over 100 years for the determination of mineral species. This analysis is carried out using specialized polarizing microscopes as well as bright field microscopes. The identification of minerals is an on-going process with many new minerals described each year. The first recorded use of asbestos was in Finland about 2500 B.C. where the material was used in the mud wattle for the wooden huts the people lived in as well as strengthening for pottery. Adverse health aspects of the mineral were noted nearly 2000 years ago when Pliny the Younger wrote about the poor health of slaves in the asbestos mines. Although known to be injurious for centuries, the first modern references to its toxicity were by the British Labor Inspectorate when it banned asbestos dust from the workplace in 1898. Asbestosis cases were described in the literature after the turn of the century. Cancer was first suspected in the mid 1930's and a causal link to mesothelioma was made in 1965. Because of the public concern for worker and public safety with the use of this material, several different types of analysis were applied to the determination of asbestos content. Light microscopy requires a great deal of experience and craft. Attempts were made to apply less subjective methods to the analysis. X-ray diffraction was partially successful in determining the mineral types but was unable to separate out the fibrous portions from the nonfibrous portions. Also, the minimum detection limit for asbestos analysis by X-ray diffraction (XRD) is about 1%. Differential Thermal Analysis (DTA) was no more successful. These provide useful corroborating information when the presence of asbestos has been shown by microscopy; however, neither can determine the difference between fibrous and nonfibrous minerals when both habits are present. The same is true of Infrared Absorption (IR). When electron microscopy was applied to asbestos analysis, hundreds of fibers were discovered present too small to be visible in any light microscope. There are two different types of electron microscopes used for asbestos analysis: Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM). Scanning Electron Microscopy is useful in identifying minerals. The SEM can provide two of the three pieces of information required to identify fibers by electron microscopy: Morphology and chemistry. The third is structure as determined by Selected Area Electron Diffraction-SAED which is performed in the TEM. Although the resolution of the SEM is sufficient for very fine fibers to be seen, accuracy of chemical analysis that can be performed on the fibers varies with fiber diameter in fibers of less than 0.2 micron diameter. The TEM is a powerful tool to identify fibers too small to be resolved by light microscopy and should be used in conjunction with this method when necessary. The TEM can provide all three pieces of information required for fiber identification. Most fibers thicker than 1 micron can adequately be defined in the light microscope. The light microscope remains as the best instrument for the determination of mineral type. This is because the minerals under investigation were first described analytically with the light microscope. It is inexpensive and gives positive identification for most samples analyzed. Further, when optical techniques are inadequate, there is ample indication that alternative techniques should be used for complete identification of the sample. (b) Principle Minerals consist of atoms that may be arranged in random order or in a regular arrangement. Amorphous materials have atoms in random order while crystalline materials have long range order. Many materials are transparent to light, at least for small particles or for thin sections. The properties of these materials can be investigated by the effect that the material has on light passing through it. The six asbestos minerals are all crystalline with particular properties that have been identified and cataloged. These six minerals are anisotropic. They have a regular array of atoms, but the arrangement is not the same in all directions. Each major direction of the crystal presents a different regularity. Light photons traveling in each of these main directions will encounter different electrical neighborhoods, affecting the path and time of travel. The techniques outlined Part I-1, Page 88 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite in this method use the fact that light traveling through fibers or crystals in different directions will behave differently, but predictably. The behavior of the light as it travels through a crystal can be measured and compared with known or determined values to identify the mineral species. Usually, Polarized Light Microscopy (PLM) is performed with strain-free objectives on a brightfield microscope platform. This would limit the resolution of the microscope to about 0.4 micron. Because WISHA requires the counting and identification of fibers visible in phase contrast, the phase contrast platform is used to visualize the fibers with the polarizing elements added into the light path. Polarized light methods cannot identify fibers finer than about 1 micron in diameter even though they are visible. The finest fibers are usually identified by inference from the presence of larger, identifiable fiber bundles. When fibers are present, but not identifiable by light microscopy, use either SEM or TEM to determine the fiber identity. (c) Advantages and Disadvantages The advantages of light microscopy are: (i) Basic identification of the materials was first performed by light microscopy and gross analysis. This provides a large base of published information against which to check analysis and analytical technique. (ii) The analysis is specific to fibers. The minerals present can exist in asbestiform, fibrous, prismatic, or massive varieties all at the same time. Therefore, bulk methods of analysis such as X-ray diffraction, IR analysis, DTA, etc. are inappropriate where the material is not known to be fibrous. (iii) The analysis is quick, requires little preparation time, and can be performed on-site if a suitably equipped microscope is available. The disadvantages are: (iv) Even using phase-polar illumination, not all the fibers present may be seen. This is a problem for very low asbestos concentrations where agglomerations or large bundles of fibers may not be present to allow identification by inference. (v) The method requires a great degree of sophistication on the part of the microscopist. An analyst is only as useful as his mental catalog of images. Therefore, a microscopist's accuracy is enhanced by experience. The mineralogical training of the analyst is very important. It is the basis on which subjective decisions are made. (vi) The method uses only a tiny amount of material for analysis. This may lead to sampling bias and false results (high or low). This is especially true if the sample is severely inhomogeneous. (vii) Fibers may be bound in a matrix and not distinguishable as fibers so identification cannot be made. (d) Method Performance (i) This method can be used for determination of asbestos content from 0 to 100% asbestos. The detection limit has not been adequately determined, although for selected samples, the limit is very low, depending on the number of particles examined. For mostly homogeneous, finely divided samples, with no difficult fibrous interferences, the Part I-1, Page 89 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite detection limit is below 1%. For inhomogeneous samples (most samples), the detection limit remains undefined. NIST has conducted proficiency testing of laboratories on a national scale. Although each round is reported statistically with an average, control limits, etc., the results indicate a difficulty in establishing precision especially in the low concentration range. It is suspected that there is significant bias in the low range especially near 1%. EPA tried to remedy this by requiring a mandatory point counting scheme for samples less than 10%. The point counting procedure is tedious, and may introduce significant biases of its own. It has not been incorporated into this method. (ii) The precision and accuracy of the quantitation tests performed in this method are unknown. Concentrations are easier to determine in commercial products where asbestos was deliberately added because the amount is usually more than a few percent. An analyst's results can be "calibrated" against the known amounts added by the manufacturer. For geological samples, the degree of homogeneity affects the precision. (iii) The performance of the method is analyst dependent. The analyst must choose carefully and not necessarily randomly the portions for analysis to assure that detection of asbestos occurs when it is present. For this reason, the analyst must have adequate training in sample preparation, and experience in the location and identification of asbestos in samples. This is usually accomplished through substantial on-the-job training as well as formal education in mineralogy and microscopy. (e) Interferences Any material which is long, thin, and small enough to be viewed under the microscope can be considered an interference for asbestos. There are literally hundreds of interferences in workplaces. The techniques described in this method are normally sufficient to eliminate the interferences. An analyst's success in eliminating the interferences depends on proper training. Asbestos minerals belong to two mineral families: The serpentines and the amphiboles. In the serpentine family, the only common fibrous mineral is chrysotile. Occasionally, the mineral antigorite occurs in a fibril habit with morphology similar to the amphiboles. The amphibole minerals consist of a score of different minerals of which only five are regulated by federal standard: Amosite, crocidolite, anthophyllite asbestos, tremolite asbestos and actinolite asbestos. These are the only amphibole minerals that have been commercially exploited for their fibrous properties; however, the rest can and do occur occasionally in asbestiform habit. In addition to the related mineral interferences, other minerals common in building material may present a problem for some microscopists: Gypsum, anhydrite, brucite, quartz fibers, talc fibers or ribbons, wollastonite, perlite, attapulgite, etc. Other fibrous materials commonly present in workplaces are: Fiberglass, mineral wool, ceramic wool, refractory ceramic fibers, kevlar, nomex, synthetic fibers, graphite or carbon fibers, cellulose (paper or wood) fibers, metal fibers, etc. Matrix embedding material can sometimes be a negative interference. The analyst may not be able to easily extract the fibers from the matrix in order to use the method. Where possible, remove the matrix before the analysis, taking careful note of the loss of weight. Some common matrix materials are: Vinyl, rubber, tar, paint, plant fiber, cement, and epoxy. A further negative interference is that the asbestos fibers themselves may be either too small to be seen in Phase Contrast Microscopy (PCM) or of a very low fibrous quality, having the appearance of plant fibers. The analyst's ability to deal with these materials increases with experience. Part I-1, Page 90 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (f) Uses and Occupational Exposure Asbestos is ubiquitous in the environment. More than 40% of the land area of the United States is composed of minerals which may contain asbestos. Fortunately, the actual formation of great amounts of asbestos is relatively rare. Nonetheless, there are locations in which environmental exposure can be severe such as in the Serpentine Hills of California. There are thousands of uses for asbestos in industry and the home. Asbestos abatement workers are the most current segment of the population to have occupational exposure to great amounts of asbestos. If the material is undisturbed, there is no exposure. Exposure occurs when the asbestoscontaining material is abraded or otherwise disturbed during maintenance operations or some other activity. Approximately 95% of the asbestos in place in the United States is chrysotile. Amosite and crocidolite make up nearly all the difference. Tremolite and anthophyllite make up a very small percentage. Tremolite is found in extremely small amounts in certain chrysotile deposits. Actinolite exposure is probably greatest from environmental sources, but has been identified in vermiculite containing, sprayed-on insulating materials which may have been certified as asbestos-free. (g) Physical and Chemical Properties The nominal chemical compositions for the asbestos minerals were given in subsection (1). Compared to cleavage fragments of the same minerals, asbestiform fibers possess a high tensile strength along the fiber axis. They are chemically inert, noncombustible, and heat resistant. Except for chrysotile, they are insoluble in Hydrochloric acid (HCl). Chrysotile is slightly soluble in HCl. Asbestos has high electrical resistance and good sound absorbing characteristics. It can be woven into cables, fabrics or other textiles, or matted into papers, felts, and mats. (h) Toxicology (This Section is for Information Only and Should Not Be Taken as WISHA Policy). Possible physiologic results of respiratory exposure to asbestos are mesothelioma of the pleura or peritoneum, interstitial fibrosis, asbestosis, pneumoconiosis, or respiratory cancer. The possible consequences of asbestos exposure are detailed in the NIOSH Criteria Document or in the WISHA Asbestos Standards, WAC 296-62-077. (2) Sampling Procedure (a) Equipment for Sampling (i) Tube or cork borer sampling device (ii) Knife (iii) 20 mL scintillation vial or similar vial (iv) Sealing encapsulant Part I-1, Page 91 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (b) Safety Precautions Asbestos is a known carcinogen. Take care when sampling. While in an asbestos-containing atmosphere, a properly selected and fit-tested respirator should be worn. Take samples in a manner to cause the least amount of dust. Follow these general guidelines: (i) Do not make unnecessary dust. (ii) Take only a small amount (1 to 2 g). (iii) Tightly close the sample container. (iv) Use encapsulant to seal the spot where the sample was taken, if necessary. (c) Sampling procedure Samples of any suspect material should be taken from an inconspicuous place. Where the material is to remain, seal the sampling wound with an encapsulant to eliminate the potential for exposure from the sample site. Microscopy requires only a few milligrams of material. The amount that will fill a 20 mL scintillation vial is more than adequate. Be sure to collect samples from all layers and phases of material. If possible, make separate samples of each different phase of the material. This will aid in determining the actual hazard. do not use envelopes, plastic or paper bags of any kind to collect samples. The use of plastic bags presents a contamination hazard to laboratory personnel and to other samples. When these containers are opened, a bellows effect blows fibers out of the container onto everything, including the person opening the container. If a cork-borer type sampler is available, push the tube through the material all the way, so that all layers of material are sampled. Some samplers are intended to be disposable. These should be capped and sent to the laboratory. If a nondisposable cork borer is used, empty the contents into a scintillation vial and send to the laboratory. Vigorously and completely clean the cork borer between samples. (d) Shipment Samples packed in glass vials must not touch or they might break in shipment. (i) Seal the samples with a sample seal over the end to guard against tampering and to identify the sample. (ii) Package the bulk samples in separate packages from the air samples. They may cross contaminate each other and will invalidate the results of the air samples. (iii) Include identifying paperwork with the samples, but not in contact with the suspected asbestos. (iv) To maintain sample accountability, ship the samples by certified mail, overnight express, or hand carry them to the laboratory. (3) Analysis The analysis of asbestos samples can be divided into two major parts: Sample preparation and microscopy. Because of the different asbestos uses that may be encountered by the analyst, each sample may need different preparation steps. The choices are outlined below. There are several different tests that are performed to identify the asbestos species and determine the percentage. They will be explained below. Part I-1, Page 92 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (a) Safety (i) Do not create unnecessary dust. Handle the samples in HEPA-filter equipped hoods. If samples are received in bags, envelopes or other inappropriate container, open them only in a hood having a face velocity at or greater than 100 fpm. Transfer a small amount to a scintillation vial and only handle the smaller amount. (ii) Open samples in a hood, never in the open lab area. (iii) Index of refraction oils can be toxic. Take care not to get this material on the skin. Wash immediately with soap and water if this happens. (iv) Samples that have been heated in the muffle furnace or the drying oven may be hot. Handle them with tongs until they are cool enough to handle. (v) Some of the solvents used, such as THF (tetrahydrofuran), are toxic and should only be handled in an appropriate fume hood and according to instructions given in the Material Safety Data Sheet (MSDS). Figure 1: Walton-Beckett Graticule with some explanatory fibers. Counts for the Fibers in the Figure Part I-1, Page 93 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite Structure No. 1 to 6 7 8 9 10 11 12 Count 1 1/2 0 2 0 0 1/2 Explanation Single fibers all contained within the circle. Fiber crosses circle once. Fiber too short. Two crossing fibers. Fiber outside graticule. Fiber crosses graticule twice. Although split, fiber only crosses once. (b) Equipment (i) Phase contrast microscope with 10x, 16x and 40x objectives, 10x wide-field eyepieces, G-22 Walton-Beckett graticule, Whipple disk, polarizer, analyzer and first order red or gypsum plate, 100 Watt illuminator, rotating position condenser with oversize phase rings, central stop dispersion objective, Kohler illumination and a rotating mechanical stage. (See Figure 1). (ii) Stereo microscope with reflected light illumination, transmitted light illumination, polarizer, analyzer and first order red or gypsum plate, and rotating stage. (iii) Negative pressure hood for the stereo microscope (iv) Muffle furnace capable of 600 degrees C (v) Drying oven capable of 50-150 degrees C (vi) Aluminum specimen pans (vii) Tongs for handling samples in the furnace (viii) High dispersion index of refraction oils (Special for dispersion staining.) n = 1.550 n = 1.585 n = 1.590 n = 1.605 n = 1.620 n = 1.670 n = 1.680 n = 1.690 (ix) A set of index of refraction oils from about n = 1.350 to n = 2.000 in n = 0.005 increments. (Standard for Becke line analysis.) Part I-1, Page 94 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (x) Glass slides with painted or frosted ends 1 x 3 inches 1mm thick, precleaned. (xi) Cover Slips 22 x 22 mm, #1 1/2 (xii) Paper clips or dissection needles (xiii) Hand grinder (xiv) Scalpel with both #10 and #11 blades (xv) 0.1 molar HCl (xvi) Decalcifying solution (Baxter Scientific Products) Ethylenediaminetetraacetic Acid, (xvii) Tetrasodium....0.7 g/l Sodium Potassium Tartrate....8.0 mg/liter Hydrochloric Acid....99.2 g/liter Sodium Tartrate....0.14 g/liter Tetrahydrofuran (THF) (xviii) Hotplate capable of 60 degrees C (xix) Balance (xx) Hacksaw blade (xxi) Ruby mortar and pestle (c) Sample Pre-Preparation Sample preparation begins with pre-preparation which may include chemical reduction of the matrix, heating the sample to dryness or heating in the muffle furnace. The end result is a sample which has been reduced to a powder that is sufficiently fine to fit under the cover slip. Analyze different phases of samples separately, e.g., tile and the tile mastic should be analyzed separately as the mastic may contain asbestos while the tile may not. (i) Wet Samples Samples with a high water content will not give the proper dispersion colors and must be dried prior to sample mounting. Remove the lid of the scintillation vial, place the bottle in the drying oven and heat at 100 degrees C to dryness (usually about 2 h). Samples which are not submitted to the lab in glass must be removed and placed in glass vials or aluminum weighing pans before placing them in the drying oven. Part I-1, Page 95 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (ii) Samples With Organic Interference-Muffle Furnace These may include samples with tar as a matrix, vinyl asbestos tile, or any other organic that can be reduced by heating. Remove the sample from the vial and weigh in a balance to determine the weight of the submitted portion. Place the sample in a muffle furnace at 500 degrees C for 1 to 2 h or until all obvious organic material has been removed. Retrieve, cool and weigh again to determine the weight loss on ignition. This is necessary to determine the asbestos content of the submitted sample, because the analyst will be looking at a reduced sample. Notes: Heating above 600 degrees C will cause the sample to undergo a structural change which, given sufficient time, will convert the chrysotile to forsterite. Heating even at lower temperatures for 1 to 2 h may have a measurable effect on the opticalproperties of the minerals. If the analyst is unsure of what to expect, a sample ofstandard asbestos should be heated to the same temperature for the same length of time so that it can be examined for the proper interpretation. (iii) Samples With Organic Interference-THF Vinyl asbestos tile is the most common material treated with this solvent, although, substances containing tar will sometimes yield to this treatment. Select a portion of the material and then grind it up if possible. Weigh the sample and place it in a test tube. Add sufficient THF to dissolve the organic matrix. This is usually about 4 to 5 mL. Remember, THF is highly flammable. Filter the remaining material through a tared silver membrane, dry and weigh to determine how much is left after the solvent extraction. Further process the sample to remove carbonate or mount directly. (iv) Samples With Carbonate Interference Carbonate material is often found on fibers and sometimes must be removed in order to perform dispersion microscopy. Weigh out a portion of the material and place it in a test tube. Add a sufficient amount of 0.1 M HCl or decalcifying solution in the tube to react all the carbonate as evidenced by gas formation; i.e., when the gas bubbles stop, add a little more solution. If no more gas forms, the reaction is complete. Filter the material out through a tared silver membrane, dry and weigh to determine the weight lost. (d) Sample Preparation Samples must be prepared so that accurate determination can be made of the asbestos type and amount present. The following steps are carried out in the low-flow hood (a low-flow hood has less than 50 fpm flow): (i) If the sample has large lumps, is hard, or cannot be made to lie under a cover slip, the grain size must be reduced. Place a small amount between two slides and grind the material between them or grind a small amount in a clean mortar and pestle. The choice of whether to use an alumina, ruby, or diamond mortar depends on the hardness of the material. Impact damage can alter the asbestos mineral if too much mechanical shock occurs. (Freezer mills can completely destroy the observable crystallinity of asbestos and should not be used). For some samples, a portion of material can be shaved off with a scalpel, ground off with a hand grinder or hacksaw blade. Part I-1, Page 96 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite The preparation tools should either be disposable or cleaned thoroughly. Use vigorous scrubbing to loosen the fibers during the washing. Rinse the implements with copious amounts of water and air-dry in a dust-free environment. (ii) If the sample is powder or has been reduced as in (i) above, it is ready to mount. Place a glass slide on a piece of optical tissue and write the identification on the painted or frosted end. Place two drops of index of refraction medium n = 1.550 on the slide. (The medium n = 1.550 is chosen because it is the matching index for chrysotile.) Dip the end of a clean paper-clip or dissecting needle into the droplet of refraction medium on the slide to moisten it. Then dip the probe into the powder sample. Transfer what sticks on the probe to the slide. The material on the end of the probe should have a diameter of about 3 mm for a good mount. If the material is very fine, less sample may be appropriate. For nonpowder samples such as fiber mats, forceps should be used to transfer a small amount of material to the slide. Stir the material in the medium on the slide, spreading it out and making the preparation as uniform as possible. Place a coverslip on the preparation by gently lowering onto the slide and allowing it to fall "trapdoor fashion" on the preparation to push out any bubbles. Press gently on the cover slip to even out the distribution of particulate on the slide. If there is insufficient mounting oil on the slide, one or two drops may be placed near the edge of the coverslip on the slide. Capillary action will draw the necessary amount of liquid into the preparation. Remove excess oil with the point of a laboratory wiper. Treat at least two different areas of each phase in this fashion. Choose representative areas of the sample. It may be useful to select particular areas or fibers for analysis. This is useful to identify asbestos in severely inhomogeneous samples. When it is determined that amphiboles may be present, repeat the above process using the appropriate high-dispersion oils until an identification is made or all six asbestos minerals have been ruled out. Note that percent determination must be done in the index medium 1.550 because amphiboles tend to disappear in their matching mediums. (e) Analytical procedure Note: This methodpresumes some knowledge ofmineralogy and optical petrography. The analysis consists of three parts: The determination of whether there is asbestos present, what type is present and the determination of how much is present. The general flow of the analysis is: (i) Gross examination. (ii) Examination under polarized light on the stereo microscope. (iii) Examination by phase-polar illumination on the compound phase microscope. (iv) Determination of species by dispersion stain. Examination by Becke line analysis may also be used; however, this is usually more cumbersome for asbestos determination. Part I-1, Page 97 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite Figure 1. Particle definitions showing mineral growth habits. From the U.S. Bureau of Mines (v) Difficult samples may need to be analyzed by SEM or TEM, or the results from those techniques combined with light microscopy for a definitive identification. Identification of a particle as asbestos requires that it be asbestiform. Description of particles should follow the suggestion of Campbell. (Figure 2) For the purpose of regulation, the mineral must be one of the six minerals covered and must be in the asbestos growth habit. Large specimen samples of asbestos generally have the gross appearance of wood. Fibers are easily parted from it. Asbestos fibers are very long compared with their widths. The fibers have a very high tensile strength as demonstrated by bending without breaking. Asbestos fibers exist in bundles that are easily parted, show longitudinal fine structure and may be tufted at the ends showing "bundle of sticks morphology. In the microscope some of these properties may not be observable. Amphiboles do not always show striations along their length even when they are asbestos. Neither will they always show tufting. They generally do not show a curved nature except for very long fibers. Asbestos and asbestiform minerals are usually characterized in groups by extremely high aspect ratios (greater than 100:1). While Part I-1, Page 98 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite aspect ratio analysis is useful for characterizing populations of fibers, it cannot be used to identify individual fibers of intermediate to short aspect ratio. Observation of many fibers is often necessary to determine whether a sample consists of "cleavage fragments" or of asbestos fibers. Most cleavage fragments of the asbestos minerals are easily distinguishable from true asbestos fibers. This is because true cleavage fragments usually have larger diameters than 1 micron. Internal structure of particles larger than this usually shows them to have no internal fibrillar structure. In addition, cleavage fragments of the monoclinic amphiboles show inclined extinction under crossed polars with no compensator. Asbestos fibers usually show extinction at zero degrees or ambiguous extinction if any at all. Morphologically, the larger cleavage fragments are obvious by their blunt or stepped ends showing prismatic habit. Also, they tend to be acicular rather than filiform. Where the particles are less than 1 micron in diameter and have an aspect ratio greater than or equal to 3:1, it is recommended that the sample be analyzed by SEM or TEM if there is any question whether the fibers are cleavage fragments or asbestiform particles. Care must be taken when analyzing by electron microscopy because the interferences are different from those in light microscopy and may structurally be very similar to asbestos. The classic interference is between anthophyllite and biopyribole or intermediate fiber. Use the same morphological clues for electron microscopy as are used for light microscopy, e.g. fibril splitting, internal longitudinal striation, fraying, curvature, etc. (vi) Gross examination: Examine the sample, preferably in the glass vial. Determine the presence of any obvious fibrous component. Estimate a percentage based on previous experience and current observation. Determine whether any pre-preparation is necessary. Determine the number of phases present. This step may be carried out or augmented by observation at 6x to 40x under a stereo microscope. (vii) After performing any necessary pre-preparation, prepare slides of each phase as described above. Two preparations of the same phase in the same index medium can be made side-by-side on the same glass for convenience. Examine with the polarizing stereo microscope. Estimate the percentage of asbestos based on the amount of birefringent fiber present. (viii) Examine the slides on the phase-polar microscopes at magnifications of 160x and 400x. Note the morphology of the fibers. Long, thin, very straight fibers with little curvature are indicative of fibers from the amphibole family. Curved, wavy fibers are usually indicative of chrysotile. Estimate the percentage of asbestos on the phase-polar microscope under conditions of crossed polars and a gypsum plate. Fibers smaller than 1.0 microns in thickness must be identified by inference to the presence of larger, identifiable fibers and morphology. If no larger fibers are visible, electron microscopy should be performed. At this point, only a tentative identification can be made. Full identification must be made with dispersion microscopy. Details of the tests are included in the appendices. Part I-1, Page 99 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (ix) Once fibers have been determined to be present, they must be identified. Adjust the microscope for dispersion mode and observe the fibers. The microscope has a rotating stage, one polarizing element, and a system for generating dark-field dispersion microscopy (see subsection (4)(f) of this appendix). Align a fiber with its length parallel to the polarizer and note the color of the Becke lines. Rotate the stage to bring the fiber length perpendicular to the polarizer and note the color. Repeat this process for every fiber or fiber bundle examined. The colors must be consistent with the colors generated by standard asbestos reference materials for a positive identification. In n = 1.550, amphiboles will generally show a yellow to straw-yellow color indicating that the fiber indices of refraction are higher than the liquid. If long, thin fibers are noted and the colors are yellow, prepare further slides as above in the suggested matching liquids listed below: Type of asbestos Chrysotile Amosite Crocidolite Anthophyllite Tremolite Actinolite Index of refraction n = 1.550. n = 1.670 or 1.680. n = 1.690. n = 1.605 and 1.620. n = 1.605 and 1.620. n = 1.620. Where more than one liquid is suggested, the first is preferred; however, in some cases this liquid will not give good dispersion color. Take care to avoid interferences in the other liquid; e.g., wollastonite in n = 1.620 will give the same colors as tremolite. In n = 1.605 wollastonite will appear yellow in all directions. Wollastonite may be determined under crossed polars as it will change from blue to yellow as it is rotated along its fiber axis by tapping on the cover slip. Asbestos minerals will not change in this way. Determination of the angle of extinction may, when present, aid in the determination of anthophyllite from tremolite. True asbestos fibers usually have 0 degree extinction or ambiguous extinction, while cleavage fragments have more definite extinction. Continue analysis until both preparations have been examined and all present species of asbestos are identified. If there are no fibers present, or there is less than 0.1% present, end the analysis with the minimum number of slides (2). (x) Some fibers have a coating on them which makes dispersion microscopy very difficult or impossible. Becke line analysis or electron microscopy may be performed in those cases. Determine the percentage by light microscopy. TEM analysis tends to overestimate the actual percentage present. (xi) Percentage determination is an estimate of occluded area, tempered by gross observation. Gross observation information is used to make sure that the high magnification microscopy does not greatly over- or under-estimate the amount of fiber present. This part of the analysis requires a great deal of experience. Satisfactory models for asbestos content analysis have not yet been developed, although some models based on metallurgical grain-size determination have found some utility. Estimation is more easily handled in situations where the grain sizes visible at about 160x are about the same and the sample is relatively homogeneous. Part I-1, Page 100 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite View all of the area under the cover slip to make the percentage determination. View the fields while moving the stage, paying attention to the clumps of material. These are not usually the best areas to perform dispersion microscopy because of the interference from other materials. But, they are the areas most likely to represent the accurate percentage in the sample. Small amounts of asbestos require slower scanning and more frequent analysis of individual fields. Report the area occluded by asbestos as the concentration. This estimate does not generally take into consideration the difference in density of the different species present in the sample. For most samples this is adequate. Simulation studies with similar materials must be carried out to apply microvisual estimation for that purpose and is beyond the scope of this procedure. (xii) Where successive concentrations have been made by chemical or physical means, the amount reported is the percentage of the material in the "as submitted" or original state. The percentage determined by microscopy is multiplied by the fractions remaining after pre-preparation steps to give the percentage in the original sample. For example: Step 1. 60% remains after heating at 550 degrees C for 1 h. Step 2. 30% of the residue of step 1 remains after dissolution of carbonate in 0.1 m HCl. Step 3. Microvisual estimation determines that 5% of the sample is chrysotile asbestos. The reported result is: R = (Microvisual result in percent)x(Fraction remaining after step 2)x(Fraction remaining of original sample after step 1) R = (5)x(.30)x(.60) = 0.9% (xiii) Report the percent and type of asbestos present. For samples where asbestos was identified, but is less than 1.0%, report "Asbestos present, less than 1.0%." There must have been at least two observed fibers or fiber bundles in the two preparations to be reported as present. For samples where asbestos was not seen, report as "None Detected." (4) Auxiliary Information Because of the subjective nature of asbestos analysis, certain concepts and procedures need to be discussed in more depth. This information will help the analyst understand why some of the procedures are carried out the way they are. (a) Light Light is electromagnetic energy. It travels from its source in packets called quanta. It is instructive to consider light as a plane wave. The light has a direction of travel. Perpendicular to this and mutually perpendicular to each other, are two vector components. One is the magnetic vector and the other is the electric vector. We shall only be concerned with the electric vector. In this description, the interaction of the vector and the mineral will describe all the observable phenomena. From a light source such a microscope illuminator, light travels in all different direction from the filament. Part I-1, Page 101 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite In any given direction away from the filament, the electric vector is perpendicular to the direction of travel of a light ray. While perpendicular, its orientation is random about the travel axis. If the electric vectors from all the light rays were lined up by passing the light through a filter that would only let light rays with electric vectors oriented in one direction pass, the light would then be polarized. Polarized light interacts with matter in the direction of the electric vector. This is the polarization direction. Using this property it is possible to use polarized light to probe different materials and identify them by how they interact with light. The speed of light in a vacuum is a constant at about 2.99^108 m/s. When light travels in different materials such as air, water, minerals or oil, it does not travel at this speed. It travels slower. This slowing is a function of both the material through which the light is traveling and the wavelength or frequency of the light. In general, the more dense the material, the slower the light travels. Also, generally, the higher the frequency, the slower the light will travel. The ratio of the speed of light in a vacuum to that in a material is called the index of refraction (n). It is usually measured at 589 nm (the sodium D line). If white light (light containing all the visible wavelengths) travels through a material, rays of longer wavelengths will travel faster than those of shorter wavelengths, this separation is called dispersion. Dispersion is used as an identifier of materials as described in Section (4)(f). (b) Material Properties Materials are either amorphous or crystalline. The difference between these two descriptions depends on the positions of the atoms in them. The atoms in amorphous materials are randomly arranged with no long range order. An example of an amorphous material is glass. The atoms in crystalline materials, on the other hand, are in regular arrays and have long range order. Most of the atoms can be found in highly predictable locations. Examples of crystalline material are salt, gold, and the asbestos minerals. It is beyond the scope of this method to describe the different types of crystalline materials that can be found, or the full description of the classes into which they can fall. However, some general crystallography is provided below to give a foundation to the procedures described. With the exception of anthophyllite, all the asbestos minerals belong to the monoclinic crystal type. The unit cell is the basic repeating unit of the crystal and for monoclinic crystals can be described as having three unequal sides, two 90 degrees angles and one angle not equal to 90 degrees. The orthorhombic group, of which anthophyllite is a member has three unequal sides and three 90 degrees angles. The unequal sides are a consequence of the complexity of fitting the different atoms into the unit cell. Although the atoms are in a regular array, that array is not symmetrical in all directions. There is long range order in the three major directions of the crystal. However, the order is different in each of the three directions. This has the effect that the index of refraction is different in each of the three directions. Using polarized light, we can investigate the index of refraction in each of the directions and identify the mineral or material under investigation. The indices alpha, beta, and gamma are used to identify the lowest, middle, and highest index of refraction respectively. The x direction, associated with alpha is called the fast axis. Conversely, the z direction is associated with gamma and is the slow direction. Crocidolite has alpha along the fiber length making it "length-fast." The remainder of the asbestos minerals have the gamma axis along the fiber length. They are called "length-slow." This orientation to fiber length is used to aid in the identification of asbestos. Part I-1, Page 102 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (c) Polarized Light Technique Polarized light microscopy as described in this section uses the phase-polar microscope described in Section (3)(b). A phase contrast microscope is fitted with two polarizing elements, one below and one above the sample. The polarizers have their polarization directions at right angles to each other. Depending on the tests performed, there may be a compensator between these two polarizing elements. Light emerging from a polarizing element has its electric vector pointing in the polarization direction ofthe element. The light will not be subsequently transmitted through a second element set at a right angle to the first element. Unless the light is altered as it passes from one element to the other, there is no transmission of light. (d) Angle ofExtinction Crystals which have different crystal regularity in two or three main directions are said to be anisotropic. They have a different index ofrefraction in each ofthe main directions. When such a crystal is inserted between the crossed polars, the field of view is no longer dark but shows the crystal in color. The color depends on the properties of the crystal. The light acts as if it travels through the crystal along the optical axes. If a crystal optical axis were lined up along one ofthe polarizing directions (either the polarizer or the analyzer) the light would appear to travel only in that direction, and it would blink out or go dark. The difference in degrees between the fiber direction and the angle at which it blinks out is called the angle of extinction. When this angle can be measured, it is useful in identifying the mineral. The procedure for measuring the angle of extinction is to first identify the polarization direction in the microscope. A commercial alignment slide can be used to establish the polarization directions or use anthophyllite or another suitable mineral. This mineral has a zero degree angle of extinction and will go dark to extinction as it aligns with the polarization directions. When a fiber of anthophyllite has gone to extinction, align the eyepiece reticle or graticule with the fiber so that there is a visual cue as to the direction of polarization in the field of view. Tape or otherwise secure the eyepiece in this position so it will not shift. After the polarization direction has been identified in the field of view, move the particle of interest to the center of the field of view and align it with the polarization direction. For fibers, align the fiber along this direction. Note the angular reading of the rotating stage. Looking at the particle, rotate the stage until the fiber goes dark or "blinks out." Again note the reading of the stage. The difference in the first reading and the second is an angle of extinction. The angle measured may vary as the orientation of the fiber changes about its long axis. Tables of mineralogical data usually report the maximum angle of extinction. Asbestos forming minerals, when they exhibit an angle of extinction, usually do show an angle of extinction close to the reported maximum, or as appropriate depending on the substitution chemistry. (e) Crossed Polars With Compensator When the optical axes of a crystal are not lined up along one of the polarizing directions (either the polarizer or the analyzer) part of the light travels along one axis and part travels along the other visible axis. This is characteristic of birefringent materials. The color depends on the difference of the two visible indices of refraction and the thickness of the crystal. The maximum difference available is the difference between the alpha and the gamma axises. This maximum difference is usually tabulated as the birefringence of the crystal. Part I-1, Page 103 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite For this test, align the fiber at 45 degrees to the polarization directions in order to maximize the contribution to each of the optical axes. The colors seen are called retardation colors. They arise from the recombination of light which has traveled through the two separate directions of the crystal. One of the rays is retarded behind the other since the light in that direction travels slower. On recombination, some of the colors which make up white light are enhanced by constructive interference and some are suppressed by destructive interference. The result is a color dependent on the difference between the indices and the thickness of the crystal. The proper colors, thicknesses, and retardations are shown on a Michel-Levy chart. The three items, retardation, thickness and birefringence are related by the following relationship: Lambda R = t(ny--a) R = retardation, t = crystal thickness in micron, and alpha, gamma = indices of refraction. Examination of the equation for asbestos minerals reveals that the visible colors for almost all common asbestos minerals and fiber sizes are shades of gray and black. The eye is relatively poor at discriminating different shades of gray. It is very good at discriminating different colors. In order to compensate for the low retardation, a compensator is added to the light train between the polarization elements. The compensator used for this test is a gypsum plate of known thickness and birefringence. Such a compensator when oriented at 45 degrees to the polarizer direction, provides a retardation of 530 nm of the 530 nm wavelength color. This enhances the red color and gives the background a characteristic red to red-magenta color. If this "full-wave" compensator is in place when the asbestos preparation is inserted into the light train, the colors seen on the fibers are quite different. Gypsum, like asbestos has a fast axis and a slow axis. When a fiber is aligned with its fast axis in the same direction as the fast axis of the gypsum plate, the ray vibrating in the slow direction is retarded by both the asbestos and the gypsum. This results in a higher retardation than would be present for either of the two minerals. The color seen is a second order blue. When the fiber is rotated 90 degrees using the rotating stage, the slow direction of the fiber is now aligned with the fast direction of the gypsum and the fast direction of the fiber is aligned with the slow direction of the gypsum. Thus, one ray vibrates faster in the fast direction of the gypsum, and slower in the slow direction of the fiber; the other ray will vibrate slower in the slow direction of the gypsum and faster in the fast direction of the fiber. In this case, the effect is subtractive and the color seen is a first order yellow. As long as the fiber thickness does not add appreciably to the color, the same basic colors will be seen for all asbestos types except crocidolite. In crocidolite the colors will be weaker, may be in the opposite directions, and will be altered by the blue absorption color natural to crocidolite. Hundreds of other materials will give the same colors as asbestos, and therefore, this test is not definitive for asbestos. The test is useful in discriminating against fiberglass or other amorphous fibers such as some synthetic fibers. Certain synthetic fibers will show retardation colors different than asbestos; however, there are some forms of polyethylene and aramid which will show morphology and retardation colors similar to asbestos minerals. This test must be supplemented with a positive identification test when birefringent fibers are present which can not be excluded by morphology. This test is relatively ineffective for use on fibers less than 1 micron in diameter. For positive confirmation TEM or SEM should be used if no larger bundles or fibers are visible. Part I-1, Page 104 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite (f) Dispersion Staining Dispersion microscopy or dispersion staining is the method of choice for the identification of asbestos in bulk materials. Becke line analysis is used by some laboratories and yields the same results as does dispersion staining for asbestos and can be used in lieu of dispersion staining. Dispersion staining is performed on the same platform as the phase-polar analysis with the analyzer and compensator removed. One polarizing element remains to define the direction of the light so that the different indices of refraction of the fibers may be separately determined. Dispersion microscopy is a dark-field technique when used for asbestos. Particles are imaged with scattered light. Light which is unscattered is blocked from reaching the eye either by the back field image mask in a McCrone objective or a back field image mask in the phase condenser. The most convenient method is to use the rotating phase condenser to move an oversized phase ring into place. The ideal size for this ring is for the central disk to be just larger than the objective entry aperture as viewed in the back focal plane. The larger the disk, the less scattered light reaches the eye. This will have the effect of diminishing the intensity of dispersion color and will shift the actual color seen. The colors seen vary even on microscopes from the same manufacturer. This is due to the different bands of wavelength exclusion by different mask sizes. The mask may either reside in the condenser or in the objective back focal plane. It is imperative that the analyst determine by experimentation with asbestos standards what the appropriate colors should be for each asbestos type. The colors depend also on the temperature of the preparation and the exact chemistry of the asbestos. Therefore, some slight differences from the standards should be allowed. This is not a serious problem for commercial asbestos uses. This technique is used for identification of the indices of refraction for fibers by recognition of color. There is no direct numerical readout of the index of refraction. Correlation of color to actual index of refraction is possible by referral to published conversion tables. This is not necessary for the analysis of asbestos. Recognition of appropriate colors along with the proper morphology are deemed sufficient to identify the commercial asbestos minerals. Other techniques including SEM, TEM, and XRD may be required to provide additional information in order to identify other types of asbestos. Make a preparation in the suspected matching high dispersion oil, e.g., n = 1.550 for chrysotile. Perform the preliminary tests to determine whether the fibers are birefringent or not. Take note of the morphological character. Wavy fibers are indicative of chrysotile while long, straight, thin, frayed fibers are indicative of amphibole asbestos. This can aid in the selection of the appropriate matching oil. The microscope is set up and the polarization direction is noted as in Section (4)(d). Align a fiber with the polarization direction. Note the color. This is the color parallel to the polarizer. Then rotate the fiber rotating the stage 90 degrees so that the polarization direction is across the fiber. This is the perpendicular position. Again note the color. Both colors must be consistent with standard asbestos minerals in the correct direction for a positive identification of asbestos. If only one of the colors is correct while the other is not, the identification is not positive. If the colors in both directions are bluish-white, the analyst has chosen a matching index oil which is higher than the correct matching oil, e.g. the analyst has used n = 1.620 where chrysotile is present. The next lower oil (Section (3)(e)) should be used to prepare another specimen. If the color in both directions is yellow-white to straw-yellow-white, this indicates that the index of the oil is lower than the index of the fiber, e.g. the preparation is in n = 1.550 while anthophyllite is present. Select the next higher oil (Section (3)(e)) and prepare another slide. Continue in this fashion until a positive identification of all asbestos species present has been made or all possible asbestos species have been ruled out by negative results in this test. Certain plant fibers can have similar dispersion colors as asbestos. Take care to note and evaluate the morphology of the fibers or remove the plant fibers in pre-preparation. Coating material on the Part I-1, Page 105 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite fibers such as carbonate or vinyl may destroy the dispersion color. Usually, there will be some outcropping of fiber which will show the colors sufficient for identification. When this is not the case, treat the sample as described in Section (3)(c) and then perform dispersion staining. Some samples will yield to Becke line analysis if they are coated or electron microscopy can be used for identification. (8) References Crane, D.T., Asbestos in Air, OSHA method ID160, Revised November 1992. Ford, W.E., Dana's Textbook of Mineralogy; Fourth Ed.; John Wiley and Son, New York, 1950, p. vii. Selikoff,.I.J., Lee, D.H.K., Asbestos and Disease, Academic Press, New York, 1978, pp. 3, 20. Women Inspectors of Factories. Annual Report for 1898, H.M. Statistical Office, London, p. 170 (1898). Selikoff,.IJ., Lee, D.H.K., Asbestos and Disease, Academic Press, New York, 1978, pp. 26, 30. Campbell, W.J., et al, Selected Silicate Minerals and Their Asbestiform Varieties, United States Department of the Interior, Bureau of Mines, Information Circular 8751, 1977. Asbestos, Code of Federal Regulations, 29 CFR 1910.1001 and 29 CFR 1926.58. National Emission Standards for Hazardous Air Pollutants; Asbestos NESHAP Revision, Federal Register, Vol. 55, No. 224, 20 November 1990, p. 48410. Ross, M. The Asbestos Minerals: Definitions, Description, Modes of Formation, Physical and Chemical Properties and Health Risk to the Mining Community, Nation Bureau of Standards Special Publication, Washington, D.C., 1977. Lilis, R., Fibrous Zeolites and Endemic Mesothelioma in Cappadocia, Turkey, J. Occ Medicine, 1981, 23, (8), 548-550. Occupational Exposure to Asbestos-1972, U.S. Department of Health Education and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health, HSM72-10267. Campbell, W.J., et al, Relationship of Mineral Habit to Size Characteristics for Tremolite Fragments and Fibers, United States Department of the Interior, Bureau of Mines, Information Circular 8367, 1979. Mefford, D., DCM Laboratory, Denver, private communication, July 1987. Deer, W.A., Howie, R.A., Zussman, J., Rock Forming Minerals, Longman, Thetford, UK, 1974. Kerr, P.F., Optical Mineralogy; Third Ed. McGraw-Hill, New York, 1959. Veblen, D.R. (Ed.), Amphiboles and Other Hydrous Pyriboles-Mineralogy, Reviews in Mineralogy, Vol. 9A, Michigan, 1982, pp 1-102. Dixon, W.C., Applications of Optical Microscopy in the Analysis of Asbestos and Quartz, ACS Symposium Series, No. 120, Analytical Techniques in Occupational Health Chemistry, 1979. Polarized Light Microscopy, McCrone Research Institute, Chicago, 1976. Part I-1, Page 106 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07753 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite Asbestos Identification, McCrone Research Institute, G & G printers, Chicago, 1987. McCrone, W.C., Calculation of Refractive Indices from Dispersion Staining Data, The Microscope, No. 37, Chicago, 1989. Levadie, B. (Ed.), Asbestos and Other Health Related Silicates, ASTM Technical Publication 834, ASTM, Philadelphia 1982. Steel, E. and Wylie, A., Riordan, P.H. (Ed.), Mineralogical Characteristics of Asbestos, Geology of Asbestos Deposits, pp. 93-101, SME-AImE, 1981. Zussman, J., The Mineralogy of Asbestos, Asbestos: Properties, Applications and Hazards, pp. 45-67 Wiley, 1979. [Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-01-079, 296-62-07753, filed 12/17/96, effective 3/1/97. Statutory Authority: Chapter 49.17 RCW. 89-21-018 (Order 89-10), 296-62-07753, filed 10/10/89, effective 11/24/89; 87-24-051 (Order 87-24), 296-62-07753, filed 11/30/87.] WAC 296-62-07755 Appendix K--Smoking cessation program information for asbestos, tremolite, anthophyllite, and actinolite--Nonmandatory. The following organizations provide smoking cessation information and program material: (1) The National Cancer Institute operates a toll-free Cancer Information Service (CIS) with trained personnel to help you. Call 1-800-4-CANCER* to reach the CIS office serving your area, or write: Office of Cancer Communications, National Cancer Institute, National Institutes of Health, Building 31, Room 10A24, Bethesda, Maryland 20892. (2) American Cancer Society, 3340 Peachtree Road, N.E., Atlanta, Georgia 30062, (404) 320-3333. The American Cancer Society (ACS) is a voluntary organization composed of 58 divisions and 3,100 local units. Through "The Great American Smokeout" in November, the annual Cancer Crusade in April, and numerous educational materials, ACS helps people learn about the health hazards of smoking and become successful ex-smokers. (3) American Heart Association, 7320 Greenville Avenue, Dallas, Texas 75231, (214) 750-5300. The American Heart Association (AHA) is a voluntary organization with 130,000 members (physicians, scientists, and laypersons) in 55 states and regional groups. AHA produces a variety of publications and audiovisual materials about the effects of smoking on the heart. AHA also has developed a guidebook for incorporating a weight-control component into smoking cessation programs. (4) American Lung Association, 1740 Broadway, New York, New York 10019, (212) 245-8000. A voluntary organization of 7,500 members (physicians, nurses, and laypersons), the American Lung Association (ALA) conducts numerous public information programs about the health effect of smoking. ALA has 59 state and 85 local units. The organization actively supports legislation and information campaigns for nonsmokers' rights and provides help for smokers who want to quit, for example, through "Freedom From Smoking," a self-help smoking cessation program. (5) Office on Smoking and Health, United States Department of Health and Human Services, 5600 Fishers Lane, Park Building, Room 110, Rockville, Maryland 20857. The Office on Smoking and Health (OSH) is the Department of Health and Human Services' lead agency in smoking control. OSH has sponsored distribution of publications on smoking-related topics, such as free flyers on relapse after initial quitting, helping a friend or family member quit smoking, the health hazards of smoking, and the effects of parental smoking on teenagers. Part I-1, Page 107 04/2007 Issue Chapter 296-62 WAC General Occupational Health Standards WAC 296-62-07755 (Cont.) Part I-1 Asbestos, Tremolite, ANthophyllite, and Actinolite *In Hawaii, on Oahu call 524-1234 (call collect from neighboring islands), Spanish-speaking staff members are available during daytime hours to callers from the following areas: California, Florida, Georgia, Illinois, New Jersey (area code 210), New York, and Texas. Consult your local telephone directory for listings of local chapters. [Statutory Authority: Chapter 49.17 RCW. 91-03-044 (Order 90-18), 296-62-07755, filed 1/10/91, effective 2/12/91.] Part I-1, Page 108 04/2007 Issue