WASHINGTON STATE REGISTER

WSR 00-01-139

EXPEDITED ADOPTION

DEPARTMENT OF

LABOR AND INDUSTRIES

[ Filed December 20, 1999, 1:12 p.m. ]

Title of Rule: Asbestos clarifications and corrections in chapter 296-62 WAC, Part I-1 and 296-65-003 Methylene chloride PEL in WAC 296-62-07515.

Purpose: Clarify asbestos clearance monitoring requirement, correct WAC references, change the emergency project definition in WAC 296-65-003 to be like RCW 49.26.125 (2)(a), and change the methylene chloride PEL listed in WAC 296-62-07515 to match substance specific standard in WAC 296-62-07470(3). Changes make it easier for employers to find, understand and comply with WISHA's requirements. They clarify current requirements, correct errors, and incorporate state statute into the rules.

Statutory Authority for Adoption: RCW 49.17.010, [49.17].040, [49.17].050 and 49.26.130.

Statute Being Implemented: Chapters 49.17 and 49.26 RCW.

Summary: Asbestos: We clarified clearance monitoring by adding a description similar to what was left out in the previous rulemaking; corrected WAC references; and corrected the emergency project definition in WAC 296-65-003 to be like the definition in RCW 49.26.125 (2)(a).

Methylene chloride PEL: We changed the permissible exposure limit in WAC 296-62-07515 to match the PEL in the methylene chloride standard (WAC 296-62-07470(3)) and to be like OSHA's standards in 29 C.F.R. 1910.1052(c) and 29 C.F.R. 1910.1000.

Reasons Supporting Proposal: Clarifications and corrections make it easier to find, understand and comply with WISHA's rules.

Name of Agency Personnel Responsible for Drafting: Tracy Spencer, Tumwater, (360) 902-5530; Implementation and Enforcement: Michael A. Silverstein, Tumwater, (360) 902-5495.

Name of Proponent: Department of Labor and Industries, governmental.

Rule is necessary because of federal law, Methylene chloride PEL -- see 29 C.F.R. 1910.1052(3) and 1910.1000.

Explanation of Rule, its Purpose, and Anticipated Effects: WAC 296-62-07515 Control of chemical agents, changed the methylene chloride permissible exposure limit (PEL) listed in the table to match the PEL in the state and federal methylene chloride standards (WAC 296-62-07470(3) and 29 C.F.R. 1910.1052(c)).

WAC 296-62-07709 Exposure assessment and monitoring, in subsection (3)(g), corrected WAC reference by changing WAC 296-62-07709 (3)(g) to "subsection (3)(h) of this section" and deleted an obsolete WAC reference that no longer applies. In subsection (3)(h), added clarification for clearance monitoring that was inadvertently left out in the previous rulemaking. Description added is similar to previous description.

WAC 296-62-07713 Methods of compliance for asbestos activities in general industry.

• Deleted redundant clean-up requirements in subsection (2). Based on the history of these requirements, we found that they relate to construction activities and were originally located in chapter 296-155 WAC. When we combined the asbestos rules into one standard, the clean-up requirements went in WAC 296-62-07723 Housekeeping, but were not removed from WAC 296-62-07713(2).

• Changed numbering of subsections.

• In subsection (4), changed references to Appendix F; changed reference to Method A to read "Method (1) negative pressure enclosure/HEPA vacuum system" to accurately reference method in Appendix F; and clarified when employers may use Method (4) Wet method instead of Method (1).

WAC 296-62-07722 Employee information and training, in subsection (3)(a), deleted "and Class II" to clarify. Class II requirements are covered in subsection (3)(b).

WAC 296-62-07727 Recordkeeping, in subsection (2)(a), corrected a WAC reference.

WAC 296-62-07745 Appendix F, corrected WAC references throughout.

WAC 296-65-003 Definitions, changed emergency project definitions to be like RCW 49.26.125 (2)(a) to read "...and does not include operations that are necessitated by nonroutine failures of equipment or systems."

Proposal Changes the Following Existing Rules: We changed the definition of emergency project to match Washington state statute found in RCW 49.26.125 (2)(a), correcting an error in the current asbestos rules. Other changes do not change current requirements. They clarify and correct WAC references.

See Explanation of Rule above for a description of changes.

NOTICE

THIS RULE IS BEING PROPOSED TO BE ADOPTED USING AN EXPEDITED RULE-MAKING PROCESS THAT WILL ELIMINATE THE NEED FOR THE AGENCY TO HOLD PUBLIC HEARINGS, PREPARE A SMALL BUSINESS ECONOMIC IMPACT STATEMENT, OR PROVIDE RESPONSES TO THE CRITERIA FOR A SIGNIFICANT LEGISLATIVE RULE. IF YOU OBJECT TO THIS RULE BEING ADOPTED USING THE EXPEDITED RULE-MAKING PROCESS, YOU MUST EXPRESS YOUR OBJECTIONS IN WRITING AND THEY MUST BE SENT TO Selwyn Walters, Department of Labor and Industries, P.O. Box 44001, Olympia, WA 98504-4001 , AND RECEIVED BY February 23, 2000.

December 20, 1999

Gary Moore

Director

OTS-3620.1

AMENDATORY SECTION(Amending WSR 98-10-029, filed 4/24/98, effective 7/24/98)

WAC 296-62-07515
Control of chemical agents.

Chemical agents shall be controlled in such a manner that the workers exposure shall not exceed the applicable limits in WAC 296-62-075 through 296-62-07515.

TABLE 1: LIMITS FOR AIR CONTAMINANTS

Permissible Exposure Limits (PEL)

		TWA		STEL ^c		CEILING		Skin Designation
Substance	CAS ^h Number	ppm^a _mg/m3^b		ppm^a _mg/m3^b		ppm^a _mg/m3^b		Skin Designation
Abate, see Temephos	----	----	----	----	----	----	----	----
Acetaldehyde	75-07-0	100	180	150	270	----	----	----
Acetic acid	64-19-7	10	25	----	----	----	----	----
Acetic anhydride	108-24-7	----	----	----	----	5.0	20	----
Acetone	67-64-1	750	1800	1000	2400	----	----	----
Acetonitrile	75-05-8	40	70	60	105	----	----	----
2-Acetylaminofluorene (see WAC 296-62-073)	53-96-3	----	----	----	----	----	----	----
Acetylene	74-86-2	Simple	Asphyxiant	----	----	----	----	----
Acetylene dichloride (see 1,2-Dichloroethylene)	----	----	----	----	----	----	----	----
Acetylene tetrabromide	79-27-6	1.0	14	----	----	----	----	----
Acetylsalicylic acid (Aspirin)	50-78-2	----	5.0	----	----	----	----	----
Acrolein	107-02-8	0.1	0.25	0.3	0.8	----	----	----
Acrylamide	79-06-1	----	0.03	----	----	----	----	X
Acrylic acid	79-10-7	10	30	----	----	----	----	X
Acrylonitrile (see WAC 296-62-07336(3))	107-13-1	----	----	----	----	----	----	----
Aldrin	309-00-2	----	0.25	----	----	----	----	X
Allyl alcohol	107-18-6	2.0	5.0	4.0	10	----	----	X
Allyl Chloride	107-05-1	1.0	3.0	2.0	6.0	----	----	----
Allyl glycidyl ether (AGE)	106-92-3	5.0	22	10	44	----	----	----
Allyl propyl disulfide	2179-59-1	2.0	12	3.0	18	----	----	----
alpha-Alumina (see Aluminum oxide)	1344-28-1
Total dust		----	10	----	----	----	----	----
Respirable fraction		----	5.0^k	----	----	----	----	----
Aluminum, metal and oxide (as Al)	7429-90-5
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
pyro powders	----	----	5.0	----	----	----	----	----
welding fumes ^f	----	----	5.0	----	----	----	----	----
soluble salts	----	----	2.0	----	----	----	----	----
alkyls (NOC)	----	----	2.0	----	----	----	----	----
Alundum (see Aluminum oxide)	----	----	----	----	----	----	----	----
4-Aminodiphenyl (see WAC 296-62-073)	92-67-1	----	----	----	----	----	----	----
2-Aminoethanol (see Ethanolamine)	----	----	----	----	----	----	----	----
2-Aminopyridine	504-29-0	0.5	2.0	----	----	----	----	----
Amitrole	61-82-5	----	0.2	----	----	----	----	----
Ammonia	7664-41-7	25	18	35	27	----	----	----
Ammonium chloride, fume	12125-02-9	----	10	----	20	----	----	----
Ammonium sulfamate (Ammate)	7773-06-0
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
n-Amyl acetate	628-63-7	100	525	----	----	----	----	----
sec-Amyl acetate	626-38-0	125	650	----	----	----	----	----
Aniline and homologues	62-53-3	2.0	8.0	----	----	----	----	X
Anisidine (o, p-isomers)	29191-52-4	0.1	0.5	----	----	----	----	X
Anitmony and compounds (as Sb)	7440-36-0	----	0.5	----	----	----	----	----
ANTU (alpha Naphthyl thiourea)	86-88-4	----	0.3	----	----	----	----	----
Argon	7440-37-1	Simple	Asphyxiant	----	----	----	----	----
Arsenic, Organic compounds (as As)	7440-38-2	----	0.2	----	----	----	----	----
Arsenic, Inorganic compounds (as As) (when use is covered by WAC 296-62-07347)	7440-38-2	----	0.01	----	----	----	----	----
Arsenic, Inorganic compounds (as As) ( when use is not covered by WAC 296-62-07347)	7440-38-2	----	0.2	----	----	----	----	----
Arsine	7784-42-1	0.05	0.2	----	----	----	----	----
Asbestos (see WAC 296-62-077 through 296-62-07753)	----	----	----	----	----	----	----	----
Asphalt (Petroleum fumes)	8052-42-4	----	5.0	----	----	----	----	----
Atrazine	1912-24-9	----	5.0	----	----	----	----	----
Azinphos methyl	86-50-0	----	0.2	----	----	----	----	X
Barium, soluble compounds (as Ba)	7440-39-3	----	0.5	----	----	----	----	----
Barium Sulfate	7727-43-7
Total dust	----	----	10.0	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Benomyl	17804-35-2
Total dust	----	0.8	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Benzene (see WAC 296-62-07523) ^d	71-43-2	1.0	----	5.0	----	----	----	----
Benzidine (see WAC 296-62-073)	92-87-5	----	----	----	----	----	----	----
p-Benzoquinone (see Quinone)	----	----	----	----	----	----	----	----
Benzo(a) pyrene (see Coal tar pitch volatiles)	----	----	----	----	----	----	----	----
Benzoyl peroxide	94-36-0	----	5.0	----	----	----	----	----
Benzyl chloride	100-44-7	1.0	5.0	----	----	----	----	----
Beryllium and beryllium compounds (as Be)	7440-41-7	---	0.002	---	0.005 (30 min.)	----	0.025	---
Biphenyl (see Diphnyl)	----	----	----	----	----	----	----	----
Bismuth telluride, Undoped	1304-82-1
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Bismuth telluride, Se-doped	----	----	5.0	----	----	----	----	----
Borates, tetra, sodium salts
Anhydrous	1330-43-4	----	1.0	----	----	----	----	----
Decahydrate	1303-96-4	----	5.0	----	----	----	----	----
Pentahydrate	12179-04-3	----	1.0	----	----	----	----	----
Boron oxide	1303-86-2
Total dust	----	----	10	----	----	----	----	----
Boron tribromide	10294-33-4	----	----	----	----	1.0	10	----
Boron trifluoride	7637-07-2	----	----	----	----	1.0	3.0	----
Bromacil	314-40-9	1.0	10	----	----	----	----	----
Bromine	7726-95-6	0.1	0.7	0.3	2.0	----	----	----
Bromine pentafluoride	7789-30-2	0.1	0.7	----	----	----	----	----
Bromochloromethane (see Chlorobromethane)	----	----	----	----	----	----	----	----
Bromoform	15-25-2	0.5	5.0	----	----	----	----	X
Butadiene (1,3-butadiene)	106-99-0	1	2.2	5	----	----	----	----
Butane	106-97-8	800	1,900	----	----	----	----	----
Butanethiol (see Butyl mercaptan)	----	----	----	----	----	----	----	----
2-Butanone (Methyl ethyl ketone)	78-93-3	200	590	300	885	----	----	----
2-Butoxy ethanol (Butyl Cellosolve)	111-76-2	25	120	----	----	----	----	X
n-Butyl acetate	123-86-4	150	710	200	950	----	----	----
sec-Butyl acetate	105-46-4	200	950	----	----	----	----	----
tert-Butyl acetate	540-88-5	200	950	----	----	----	----	----
Butyl acrylate	141-32-2	10	55	----	----	----	----	----
n-Butyl alcohol	71-36-3	----	----	----	----	50	150	X
sec-Butyl alcohol	78-92-2	100	305	----	----	----	----	----
tert-Butyl alcohol	75-65-0	100	300	150	450	----	----	----
Butylamine	109-73-9	----	----	----	----	5.0	15	X
tert-Butyl chromate (see CrO3)	1189-85-1	----	----	----	----	----	0.1	X
n-Butyl glycidyl ether (BGE)	2426-08-6	25	135	----	----	----	----	----
n-Butyl lactate	138-22-7	5.0	25	----	----	----	----	----
Butyl mercaptan	109-79-5	0.5	1.5	----	----	----	----	----
o-sec-Butylphenol	89-72-5	5.0	30	----	----	----	----	X
p-tert-Butyl-toluene	98-51-1	10	60	20	120	----	----	----
Cadmium oxide fume (as Cd) (see WAC 296-62-074)	1306-19-0	----	----	----	----	----	--	----
Cadmium dust and salts (as Cd) (see WAC 296-62-074)	7440-43-9	----	---	----	----	----	----	----
Calcium arsenate (see WAC 296-62-07347)	----	----	----	----	----	----	----	----
Calcium carbonate	1317-65-3
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Calcium cyanamide	156-62-7	----	0.5	----	----	----	----	----
Calcium hydroxide	1305-62-0	----	5.0	----	----	----	----	----
Calcium oxide	1305-78-8	----	2.0	----	----	----	----	----
Calcium silicate	1344-95-2
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Calcium sulfate	7778-18-9
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Camphor (synthetic)	76-22-2	----	2.0	----	----	----	----	----
Caprolactam	105-60-2
Dust	----	----	1.0	----	3.0	----	----	----
Vapor	----	5.0	20	10	40	----	----	----
Captafol (Difolatan)	2425-06-1	----	0.1	----	----	----	----	X
Captan	133-06-2	----	5.0	----	----	----	----	----
Carbaryl (Sevin)	63-25-2	----	5.0	----	----	----	----	----
Carbofuran (Furadon)	1563-66-2	----	0.1	----	----	----	----	----
Carbon black	1333-86-4	----	3.5	----	----	----	----	----
Carbon dioxide	124-38-9	5,000	9,000	30,000	54,000	----	----	----
Carbon disulfide	75-15-0	4.0	12	12	36	----	----	X
Carbon monoxide	630-08-0	35	40	----	----	200 ^j	229 ^j	----
Carbon tetrabromide	558-13-4	0.1	1.4	0.3	4.0	----	----	----
Carbon tetrachloride	56-23-5	2.0	12.6	----	----	----	----	X
Carbonyl chloride (see Phosgene)	----	----	----	----	----	----	----	----
Carbonyl fluoride	353-50-4	2.0	5.0	5.0	15	----	----	----
Catechol (Pyrocatechol)	120-80-9	5.0	20	----	----	----	----	X
Cellulose (paper fiber)	9004-34-6
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Cesium hydroxide	21351-79-1	----	2.0	----	----	----	----	----
Chlordane	57-74-9	----	0.5	----	----	----	----	X
Chlorinated camphene	8001-35-2	----	0.5	----	1.0	----	----	X
Chlorinated diphenyl oxide	55720-99-5	----	0.5	----	----	----	----	----
Chlorine	7782-50-5	0.5	1.5	1.0	3.0	1.0	3.0	----
Chlorine dioxide	10049-04-4	0.1	0.3	0.3	0.9	----	----	----
Chlorine trifluoride	7790-91-2	----	----	----	----	0.1	0.4	----
Chloroacetaldehyde	107-20-0	----	----	----	----	1.0	3.0	----
a-Chloroacetophenone (Phenacyl chloride)	532-21-4	0.05	0.3	----	----	----	----	----
Chloroacetyl chloride	79-04-9	0.05	0.2	----	----	----	----	----
Chlorobenzene (Monochlorobenzene)	108-90-7	75	350	----	----	----	----	----
o-Chlorobenzylidene malononitrile (OCBM)	2698-41-1	----	----	----	----	0.05	0.4	X
Chlorobromomethane	74-97-5	200	1,050	----	----	----	----	----
2-Chloro-1, 3-butadiene (see beta-Chloroprene)	----	----	----	----	----	----	----	----
Chlorodifluoromethane	75-45-6	1,000	3,500	----	----	----	----	----
Chlorodiphenyl (42% Chlorine) (PCB)	53469-21-9	----	1.0	----	----	----	----	X
Chlorodiphenyl (54% Chlorine) (PCB)	11097-69-1	----	0.5	----	----	----	----	X
1-Chloro-2, 3-epoxypropane (see Epichlorhydrin)	----	----	----	----	----	----	----	----
2-Chloroethanol (see Ethylene chlorohydrin)	----	----	----	----	----	----	----	----
Chloroethylene (see vinyl chloride)	----	----	----	----	----	----	----	----
Chloroform (Trichloromethane)	67-66-3	2.0	9.78	----	----	----	----	----
1-Chloro-1-nitropropane	600-25-9	2.0	10	----	----	----	----	----
bis-Chloromethyl ether (see WAC 296-62-073)	542-88-1	----	----	----	----	----	----	----
Chloromethyl methyl ether (see Methyl carbomethyl ether)	107-30-2	----	----	----	----	----	----	----
Chloropentafluoroethane	76-15-3	1,000	6,320	----	----	----	----	----
Chloropicrin	76-06-2	0.1	0.7	----	----	----	----	----
beta-Chloroprene	126-99-8	10	35	----	----	----	----	X
o-Chlorostyrene	2039-87-4	50	285	75	428	----	----	----
o-Chlorotoluene	95-49-8	50	250	----	----	----	----	----
2-Chloro-6-trichloromethyl pyridine (see Nitrapyrin)	1929-82-4
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Chlorpyrifos	2921-88-2	----	0.2	----	----	----	----	X
Chromic acid and chromates (as CrO3)	Varies with compounds	----	----	----	----	----	0.1	----
Chromium, sol, chromic, chromous salts (as Cr)	7440-47-3	----	0.5	----	----	----	----	----
Chromium (VI) compounds (as Cr)	----	----	0.05	----	----	----	----	----
Chromium Metal and insoluble salts	7440-47-3	----	0.5	----	----	----	----	----
Chromyl chloride	14977-61-8	0.025	0.15	----	----	----	----	----
Chrysene (see Coal tar pitch volatiles)	----	----	----	----	----	----	----	----
Clopidol	2971-90-6
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Coal dust (less than 5% SiO2) Respirable fraction	----	----	2.0^g	----	----	----	----	----
Coal dust (greater than or equal to 5% SiO2) Respirable fraction	----	----	0.1^g	----	----	----	----	----
Coal tar pitch volatiles (benzene soluble fraction anthracene, BaP, phenanthrene, acridine, chrysene, pyrene)	65996-93-2	----	0.2	----	----	----	----	----
Cobalt, metal fume & dust (as Co)	7440-48-4	----	0.05	----	----	----	----	----
Cobalt carbonyl (as Co)	10210-68-1	----	0.1	----	----	----	----	----
Cobalt hydrocarbonyl (as Co)	16842-03-8	----	0.1	----	----	----	----	----
Coke oven emissions (see WAC 296-62-200)	----	----	----	----	----	----	----	----
Copper fume (as Cu)	7440-50-8	----	0.1	----	----	----	----	----
Dusts and mists (as Cu)	----	----	1.0	----	----	----	----	----
Cotton dust (raw) ^e	----	----	1.0	----	----	----	----	----
Corundum (see Aluminum oxide)	----	----	----	----	----	----	----	----
Crag herbicide (Sesone)	136-78-7
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Cresol (all isomers)	1319-77-3	5.0	22	----	----	----	----	X
Crotonaldehyde	123-73-9; 4170-30-3	2.0	6.0	----	----	----	----	----
Crufomate	299-86-5	----	5.0	----	----	----	----	----
Cumene	98-82-8	50	245	----	----	----	----	X
Cyanamide	420-04-2	----	2.0	----	----	----	----	----
Cyanide (as CN)	Varies with compound	----	5.0	----	----	----	----	X
Cyanogen	460-19-5	10	20	----	----	----	----	----
Cyanogen chloride	506-77-4	----	----	----	----	0.3	0.6	----
Cyclohexane	110-82-7	300	1,050
Cyclohexanol	108-93-0	50	200	----	----	----	----	X
Cyclohexanone	108-94-1	25	100	----	----	----	----	X
Cyclohexene	110-83-8	300	1,015	----	----	----	----	----
Cyclohexylamine	108-91-8	10	40	----	----	----	----	----
Cyclonite (see RDX)	121-82-4	----	1.5	----	----	----	----	X
Cyclopentadiene	542-92-7	75	200	----	----	----	----	----
Cyclopentane	287-92-3	600	1,720	----	----	----	----	----
Cyhexatin	13121-70-5	----	5.0
2,4-D (Dichlorophenoxy- acetic acid)	94-75-7	----	10	----	----	----	----	----
DDT (Dichlorodiphenyltri- chloroethane)	50-29-3	----	1.0	----	----	----	----	X
DDVP, Dichlorvos	62-73-7	0.1	1.0	----	----	----	----	X
Decaborane	17702-41-9	0.05	0.3	0.15	0.9	----	----	X
Demeton	8065-48-3	0.01	0.1	----	----	----	----	X
Diacetone alcohol (4-hydroxy-4-methyl- 2-pentanone)	123-42-2	50	240	----	----	----	----	----
1, 2-Diaminoethane (see Ethylenediamine)	----	----	----	----	----	----	----	----
Diazinon	333-41-5	----	0.1	----	----	----	----	X
Diazomethane	334-88-3	0.2	0.4	----	----	----	----	----
Diborane	19287-45-7	0.1	0.1	----	----	----	----	----
Dibrom (see Naled)	----	----	----	----	----	----	----	----
1, 2-Dibromo-3-chloropropane (DBCP) (see WAC 296-62-07342)	96-12-8	----	----	----	----	----	----	----
2-N-Dibutylamino ethanol	102-81-8	2.0	14	----	----	----	----	X
Dibutyl phosphate	107-66-4	1.0	5.0	2.0	10	----	----	----
Dibutyl phthalate	84-74-2	----	5.0	----	----	----	----	----
Dichloroacetylene	7572-29-4	----	----	----	----	0.1	0.4	----
o-Dichlorobenzene	95-50-1	----	----	----	----	50	300	----
p-Dichlorobenzene	106-46-7	75	450	110	675	----	----	----
3, 3'-Dichlorobenzidine (see WAC 296-62-073)	91-94-1	----	----	----	----	----	----	----
Dichlorodifluoromethane	75-71-8	1,000	4,950	----	----	----	----	----
1, 3-Dichloro-5, 5-dimethyl hydantoin	118-52-5	----	0.2	----	0.4	----	----	----
1, 1-Dichloroethane	75-34-3	100	400	----	----	----	----	----
1, 2-Dichloroethane (see Ethylene dichloride)	----	----	----	----	----	----	----	----
1, 2-Dichloroethylene	540-59-0	200	790	----	----	----	----	----
1, 1-Dichloroethylene (see Vinylidene chloride)	----	----	----	----	----	----	----	----
Dichloroethyl ether	111-44-4	5.0	30	10	60	----	----	X
Dichlorofluoromethane	75-43-4	10	40	----	----	----	----	----
Dichloromethane (see Methylene chloride)	----	----	----	----	----	----	----	----
1, 1-Dichloro-1-nitroethane	594-72-9	2.0	10.	10.	----	----	----	----
1, 2-Dichloropropane (see Propylene dichloride)	----	----	----	----	----	----	----	----
Dichloropropene	542-75-6	1.0	5.0	----	----	----	----	X
2, 2-Dichloropropionic acid	75-99-0	1.0	6.0	----	----	----	----	----
Dichlorotetrafluoroethane	76-14-2	1,000	7,000	----	----	----	----	----
Dichlorvos (DDVP)	62-73-7	0.1	1.0	----	----	----	----	X
Dicrotophos	141-66-2	----	0.25	----	----	----	----	X
Dicyclopentadiene	77-73-6	5.0	30	----	----	----	----	----
Dicyclopentadienyl iron	102-54-5
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Dieldrin	60-57-1	----	0.25	----	----	----	----	X
Diethanolamine	111-42-2	3.0	15	----	----	----	----	----
Diethylamine	109-89-7	10	30	25	75	----	----	----
2-Diethylaminoethanol	100-37-8	10	50	----	----	----	----	X
Diethylene triamine	111-40-0	1.0	4.0	----	----	----	----	X
Diethyl ether (see Ethyl ether)	----	----	----	----	----	----	----	----
Diethyl ketone	96-22-0	200	705	----	----	----	----	----
Diethyl phthalate	84-66-2	----	5.0	----	----	----	----	----
Difluorodibromomethane	75-61-6	100	860	----	----	----	----	----
Diglycidyl ether (DGE)	2238-07-5	0.1	0.5	----	----	----	----	----
Dihydroxybenzene (see Hydroquinone)	----	----	----	----	----	----	----	----
Diisobutyl ketone	108-83-8	25	150	----	----	----	----	----
Diisopropylamine	108-18-9	5.0	20	----	----	----	----	X
Dimethoxymethane (see Methylal)	----	----	----	----	----	----	----	----
Dimethyl acetamide	127-19-5	10	35	----	----	----	----	X
Dimethylamine	124-40-3	10	18	----	----	----	----	----
4-Dimethylaminoazobenzene (see WAC 296-62-073)	60-11-7	----	----	----	----	----	----	----
Dimethylaminobenzene (see Xylidene)	----	----	----	----	----	----	----	----
Dimethylaniline (N, N-Dimethylaniline)	121-69-7	5.0	25	10	50	----	----	X
Dimethylbenzene (see Xylene)	----	----	----	----	----	----	----	----
Dimethyl-1, 2-dibromo-2, 2-dichloroethyl phosphate (see Naled)	300-76-5	----	3.0	----	----	----	----	X
Dimethylformamide	68-12-2	10	30	----	----	----	----	X
2, 6-Dimethylheptanone (see Diisobutyl ketone)	----	----	----	----	----	----	----	----
1, 1-Dimethylhydrazine	57-14-7	0.5	1.0	----	----	----	----	X
Dimethyl phthalate	131-11-3	----	5.0	----	----	----	----	----
Dimethyl sulfate	77-78-1	0.1	0.5	----	----	----	----	X
Dinitolmide	148-01-6	----	5.0	----	----	----	----	----
(3, 5-Dinitro-o-toluamide)
Dinitrobenzene (all isomers)	(alpha) 528-29-0; (meta) 99-65-0; (para) 100-25-4	0.15	1.0	----	----	----	----	X
Dinitro-o-cresol	534-52-1	----	0.2	----	----	----	----	X
Dinitrotoluene	25321-14-6	----	1.5	----	----	----	----	X
Dioxane (Diethylene dioxide)	123-91-1	25	90	----	----	----	----	X
Dioxathion	78-34-2	----	0.2	----	----	----	----	X
Diphenyl (Biphenyl)	92-52-4	0.2	1.0	----	----	----	----	----
Diphenylamine	122-39-4	----	10	----	----	----	----	----
Diphenylmethane diisocyanate (see Methylene bisphenyl isocyanate (MDI))	----	----	----	----	----	----	----	----
Dipropylene glycol methyl ether	34590-94-8	100	600	150	900	----	----	X
Dipropyl ketone	123-19-3	50	235	----	----	----	----	----
Diquat	85-00-7	----	0.5	----	----	----	----	----
Di-sec, Octyl phthalate (Di-2-ethylhexylphthalate)	117-81-7	----	5.0	----	10	----	----	----
Disulfram	97-77-8	----	2.0	----	----	----	----	----
Disulfoton	298-04-4	----	0.1	----	----	----	----	X
2, 6-Di-tert-butyl-p-cresol	128-37-0	----	10	----	----	----	----	----
Diuron	330-54-1	----	10	----	----	----	----	----
Divinyl benzene	1321-74-0	10	50	----	----	----	----	----
Emery	12415-34-8
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Endosulfan (Thiodan)	115-29-7	----	0.1	----	----	----	----	X
Endrin	72-20-8	----	0.1	----	----	----	----	X
Epichlorhydrin	106-89-8	2.0	8.0	----	----	----	----	X
EPN	2104-64-5	----	0.5	----	----	----	----	X
1, 2-Epoxypropane (see Propylene oxide)	----	----	----	----	----	----	----	----
2, 3-Epoxy-1-propanol (see Glycidol)	----	----	----	----	----	----	----	----
Ethane	----	Simple	Asphyxiant	----	----	----	----	----
Ethanethiol (see Ethyl mercaptan)	----	----	----	----	----	----	----	----
Ethanolamine	141-43-5	3.0	8.0	6.0	15	----	----	----
Ethion	563-12-2	----	0.4	----	----	----	----	X
2-Ethoxyethanol	110-80-5	5.0	19	----	----	----	----	X
2-Ethoxyethyl acetate (Cellosolve acetate)	111-15-9	5.0	27	----	----	----	----	X
Ethyl acetate	141-78-6	400	1,400	----	----	----	----	----
Ethyl acrylate	140-88-5	5.0	20	25	100	----	----	X
Ethyl alcohol (ethanol)	64-17-5	1,000	1,900	----	----	----	----	----
Ethylamine	75-04-07	10	18	----	----	----	----	----
Ethyl amyl ketone (5-Methyl-3-hepatone)	541-85-5	25	130	----	----	----	----	----
Ethyl benzene	100-41-4	100	435	125	545	----	----	----
Ethyl bromide	74-96-4	200	890	250	1,110	----	----	----
Ethyl butyl ketone (3-Heptanone)	106-35-4	50	230	----	----	----	----	----
Ethyl chloride	75-00-3	1,000	2,600	----	----	----	----	----
Ethylene	74-85-1	Simple	Asphyxiant	----	----	----	----	----
Ethylene chlorohydrin	107-07-3	----	----	----	----	1.0	3.0	X
Ethylenediamine	107-15-3	10	25	----	----	----	----	X
Ethylene dibromide	106-93-4	0.1	----	0.5	----	----	----	----
Ethylene dichloride	107-06-2	1.0	4.0	2.0	8.0	----	----	----
Ethylene glycol	107-21-1	----	----	----	----	50	125	----
Ethylene glycol dinitrate	628-96-6	----	----	----	0.1	----	----	X
Ethylene glycol monomethyl ether acetate (Methyl cellosolve acetate)	----	5.0	24	----	----	----	----	X
Ethyleneimine (see WAC 296-62-073)	151-56-4	----	----	----	----	----	----	X
Ethylene oxide (see WAC 296-62-07359)	75-21-8	1.0	2.0	----	----	----	----	----
Ethyl ether	60-29-7	400	1,200	500	1,500	----	----	----
Ethyl formate	109-94-4	100	300	----	----	----	----	----
Ethylidine chloride (see 1, 1-Dichloroethane)	----	----	----	----	----	----	----	----
Ethylidene norbornene	16219-75-3	----	----	----	----	5.0	25	----
Ethyl mercaptan	75-08-1	0.5	1.0	----	----	----	----	----
n-Ethylmorpholine	100-74-3	5.0	23	----	----	----	----	X
Ethyl sec-amyl ketone (5-methyl-3-heptanone)	----	25	130	----	----	----	----	----
Ethyl silicate	78-10-4	10	85	----	----	----	----	----
Fenamiphos	22224-92-6	----	0.1	----	----	----	----	X
Fensulfothion (Dasanit)	115-90-2	----	0.1	----	----	----	----	----
Fenthion	55-38-9	----	0.2	----	----	----	----	X
Ferbam	14484-64-1	----	----	----	----	----	----	----
Total dust	----	----	10	----	----	----	----	----
Ferrovanadium dust	12604-58-9	----	1.0	----	3.0	----	----	----
Fluorides (as F)	Varies with compound	----	2.5	----	----	----	----	----
Fluorine	7782-41-4	0.1	0.2	----	----	----	----	----
Fluorotrichloromethane (see Trichlorofluoro methane)	75-69-4	----	----	----	----	1,000	5,600	----
Fonofos	944-22-9	----	0.1	----	----	----	----	X
Formaldehyde (see WAC 296-62-07540)	50-00-0	0.75	----	2.0	----	----	----	----
Formamide	75-12-7	20	30	30	45	----	----	----
Formic acid	64-18-6	5.0	9.0	----	----	----	----	----
Furfural	98-01-1	2.0	8.0	----	----	----	----	X
Furfuryl alcohol	98-00-0	10	40	15	60	----	----	X
Gasoline	8006-61-9	300	900	500	1,500	----	----	----
Germanium tetrahydride	7782-65-2	0.2	0.6	----	----	----	----	----
Glass, fibrous or dust	----	----	10	----	----	----	----	----
Gluteraldehyde	111-30-8	----	----	----	----	0.2	0.8	----
Glycerin mist	56-81-5
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Glycidol (2, 3-Epoxy-1-propanol)	556-52-5	25	75	----	----	----	----	----
Glycol monoethyl ether (see 2-Ethoxyethanol)	----	----	----	----	----	----	----	----
Grain dust (oat, wheat, barley)	----	----	10	----	----	----	----	----
Graphite, natural	7782-42-5
Respirable dust	----	----	2.5^k	----	----	----	----	----
Graphite, Synthetic
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Guthion (see Azinphosmethyl)	----	----	----	----	----	----	----	----
Gypsum	13397-24-5
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Hafnium	7440-58-6	----	0.5	----	----	----	----	----
Helium	----	Simple	Asphyxiant	----	----	----	----	----
Heptachlor	76-44-8	----	0.5	----	----	----	----	X
Heptane (n-heptane)	142-82-5	400	1,600	500	2,000	----	----	----
2-Heptanone (see Methyl n-amyl ketone)	----	----	----	----	----	----	----	----
3-Heptanone (see Ethyl butyl ketone)	----	----	----	----	----	----	----	----
Hexachlorobutadiene	87-68-3	0.02	0.24	----	----	----	----	X
Hexachlorocyclopentadiene	77-47-4	0.01	0.1	----	----	----	----	----
Hexachloroethane	67-72-1	1.0	10	----	----	----	----	X
Hexachloronaphthalene	1335-87-1	----	0.2	----	----	----	----	X
Hexafluoroacetone	684-16-2	0.1	0.7	----	----	----	----	X
Hexane
n-hexane	110-54-3	50	180	----	----	----	----	----
other Isomers	Varies with compound	500	1,800	1,000	3,600	----	----	----
2-Hexanone (Methyl-n-butyl ketone)	591-78-6	5.0	20	----	----	----	----	----
Hexone (Methyl isobutyl ketone)	108-10-1	50	205	75	300	----	----	----
sec-Hexyl acetate	108-84-9	50	300	----	----	----	----	----
Hexylene Glycol	107-41-5	----	----	----	----	25	125	----
Hydrazine	302-01-2	0.1	0.1	----	----	----	----	X
Hydrogen	----	Simple	Asphyxiant	----	----	----	----	----
Hydrogenated terphenyls	61788-32-7	0.5	5.0	----	----	----	----	----
Hydrogen bromide	10035-10-6	----	----	----	----	3.0	10	----
Hydrogen chloride	7647-01-0	----	----	----	----	5.0	7.0	----
Hydrogen cyanide	74-90-8	----	----	4.7	5.0	----	----	X
Hydrogen fluoride	7664-39-3	----	----	----	----	3.0	2.5	----
Hydrogen peroxide	7722-84-1	1.0	1.4	----	----	----	----	----
Hydrogen selenide (as Se)	7783-07-5	0.05	0.2	----	----	----	----	----
Hydrogen Sulfide	7783-06-4	10	14	15	21	----	----	----
Hydroquinone	123-31-9	----	2.0	----	----	----	----	----
4-Hydroxy-4-methyl-2-pentanone (see Diacetone alcohol)	----	----	----	----	----	----	----	----
2-Hydroxypropyl acrylate	999-61-1	0.5	3.0	----	----	----	----	X
Indene	95-13-6	10	45	----	----	----	----	----
Indium and compounds (as In)	7440-74-6	----	0.1	----	----	----	----	----
Iodine	7553-56-2	----	----	----	----	0.1	1.0	----
Iodoform	75-47-8	0.6	10	----	----	----	----	----
Iron oxide dust and fume (as Fe)	1309-37-1
Total particulate	----	----	5.0	----	----	----	----	----
Iron pentacarbonyl (as Fe)	13463-40-6	0.1	0.8	0.2	1.6	----	----	----
Iron salts, soluble (as Fe)	Varies with compound	----	1.0	----	----	----	----	----
Isoamyl acetate	123-92-2	100	525	----	----	----	----	----
Isoamyl alcohol (primary and secondary)	123-51-3	100	360	125	450	----	----	----
Isobutyl acetate	110-19-0	150	700	----	----	----	----	----
Isobutyl alcohol	78-83-1	50	150	----	----	----	----	----
Isooctyl alcohol	26952-21-6	50	270	----	----	----	----	X
Isophorone	78-59-1	4.0	23	----	----	5.0	25	----
Isophorone diisocyanate	4098-71-9	0.005	0.045	0.02	----	----	----	X
Isopropoxyethanol	109-59-1	25	105	----	----	----	----	----
Isopropyl acetate	108-21-4	250	950	310	1,185	----	----	----
Isopropyl alcohol	67-63-0	400	980	500	1,225	----	----	----
Isopropylamine	75-31-0	5.0	12	10	24	----	----	----
N-Isopropylaniline	768-52-5	2.0	10	----	----	----	----	X
Isopropyl ether	108-20-3	250	1,050	----	----	----	----	----
Isopropyl glycidyl ether (IGE)	4016-14-2	50	240	75	360	----	----	----
Kaolin
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Ketene	463-51-4	0.5	0.9	1.5	3.0	----	----	----
Lead inorganic (as Pb) (see WAC 296-62-07521)	7439-92-1	----	0.05	----	----	----	----	----
Lead arsenate (see WAC 296-62-07347)	3687-31-8	----	0.05	----	----	----	----	----
Lead chromate	7758-97-6	----	0.05	----	----	----	----	----
Limestone	1317-65-3
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Lindane	58-89-9	----	0.5	----	----	----	----	X
Lithium hydride	7580-67-8	----	0.025	----	----	----	----	----
L.P.G. (liquified petroleum gas)	68476-85-7	1,000	1,800	----	----	----	----	----
Magnesite	546-93-0
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Magnesium oxide fume	1309-48-4
Total particulate	----	----	10	----	----	----	----	----
Malathion	121-75-5
Total dust	----	----	10	----	----	----	----	X
Maleic anhydride	108-31-6	0.25	1.0	----	----	----	----	----
Manganese and compound (as Mn)	7439-96-5	----	----	----	----	----	5.0	----
Manganese tetroxide and fume (as Mn)	7439-96-5	----	1.0	----	3.0	----	----	----
Manganese cyclopentadienyl tricarbonyl (as Mn)	12079-65-1	----	0.1	----	----	----	----	X
Manganese tetroxide (as Mn)	1317-35-7	----	1.0	----	----	----	----	----
Marble	1317-65-3
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Mercury (aryl and inorganic) (as Hg)	7439-97-6	----	----	----	----	----	0.1	X
Mercury (organo-alkyl compounds) (as Hg)	7439-97-6	----	0.01	----	0.03	----	----	X
Mercury (vapor) (as Hg)	7439-97-6	----	0.05	----	----	----	----	X
Mesityl oxide	141-79-7	15	60	25	100	----	----	----
Methacrylic acid	79-41-4	20	70	----	----	----	----	X
Methane	----	Simple	Asphyxiant	----	----	----	----	----
Methanethiol (see Methyl mercaptan)	----	----	----	----	----	----	----	----
Methomyl (lannate)	16752-77-5	----	2.5	----	----	----	----	----
Methoxychlor	72-43-5
Total dust	----	----	10	----	----	----	----	----
2-Methoxyethanol (Methyl cellosolve)	109-86-4	5.0	16	----	----	----	----	X
4-Methoxyphenol	150-76-5	----	5.0	----	----	----	----	----
Methyl acetate	79-20-9	200	610	250	760	----	----	----
Methyl acetylene (propyne)	74-99-7	1,000	1,650	----	----	----	----	----
Methyl acetylene-propadiene mixture (MAPP)	----	1,000	1,800	1,250	2,250	----	----	----
Methyl acrylate	96-33-3	10	35	----	----	----	----	X
Methylacrylonitrile	126-98-7	1.0	3.0	----	----	----	----	X
Methylal (Dimethoxy-methane)	109-87-5	1,000	3,100	----	----	----	----	----
Methyl alcohol (methanol)	67-56-1	200	260	250	325	----	----	X
Methylamine	74-89-5	10	12	----	----	----	----	----
Methyl amyl alcohol (see Methyl isobutyl carbinol)	----	----	----	----	----	----	----	----
Methyl n-amyl ketone (2-Heptanone)	110-43-0	50	235	----	----	----	----	----
N-Methyl aniline (see Monomethyl aniline)	----	----	----	----	----	----	----	----
Methyl bromide	74-83-9	5.0	20	----	----	----	----	X
Methyl butyl ketone (see 2-Hexanone)	----	----	----	----	----	----	----	----
Methyl cellosolve (see 2-Methoxyethanol)	109-86-4	5.0	16	----	----	----	----	X
Methyl cellosolve acetate (2-Methoxyethyl acetate)	110-49-6	5.0	24	----	----	----	----	X
Methyl chloride	74-87-3	50	105	100	210	----	----	----
Methyl chloroform (1, 1, 1-trichlorethane)	71-55-6	350	1,900	450	2,450	----	----	----
Methyl chloromethyl ether (see WAC 296-62-073)	107-30-2	----	----	----	----	----	----	----
Methyl 2-cyanoacrylate	137-05-3	2.0	8.0	4.0	16	----	----	----
Methylcyclohexane	108-87-2	400	1,600	----	----	----	----	----
Methylcyclohexanol	25639-42-3	50	235	----	----	----	----	----
Methylcyclohexanone	583-60-8	50	230	75	345	----	----	X
Methylcyclopentadienyl manganese tricarbonyl (as Mn)	12108-13-3	----	0.2	----	----	----	----	X
Methyl demeton	8022-00-2	----	0.5	----	----	----	----	X
Methylene bisphenyl isocyanate (MDI)	101-68-8	----	----	----	----	0.02	0.2	----
4, 4'-Methylene bis (2-chloroaniline (MBOCA)) (see WAC 296-62-073)	101-14-4	0.02	0.22	----	----	----	----	X
Methylene bis (4-cyclohexylisocyanate)	5124-30-1	----	----	----	----	0.01	0.11	----
Methylene chloride (see WAC 296-62-07470)	75-09-2	((~~100~~)) 25	----	((~~500~~)) 125	----	----	----	----
4, 4-Methylene dianiline	101-77-9	0.1	0.8	----	----	----	----	X
Methyl ethyl ketone (MEK) (see 2-Butanone)	78-93-3	----	----	----	----	----	----	----
Methyl ethyl ketone peroxide (MEKP)	1338-23-4	----	----	----	----	0.2	1.5	----
Methyl formate	107-31-3	100	250	150	375	----	----	----
5-Methyl-3-heptanone (see Ethyl amyl ketone)	----	----	----	----	----	----	----	----
Methyl hydrazine (see Monomethyl hydrazine)	60-34-4	----	----	----	----	0.2	0.35	X
Methyl iodide	74-88-4	2.0	10	----	----	----	----	X
Methyl isoamyl ketone	110-12-3	50	240	----	----	----	----	----
Methyl isobutyl carbinol	108-11-2	25	100	40	165	----	----	X
Methyl isobutyl ketone (see Hexone)	----	----	----	----	----	----	----	----
Methyl isocyanate	624-83-9	0.02	0.05	----	----	----	----	X
Methyl isopropyl ketone	563-80-4	200	705	----	----	----	----	----
Methyl mercaptan	74-93-1	0.5	1.0	----	----	----	----	----
Methyl methacrylate	80-62-6	100	410	----	----	----	----	----
Methyl parathion	298-00-0	----	0.2	----	----	----	----	X
Methyl propyl ketone (see 2-Pentanone)	----	----	----	----	----	----	----	----
Methyl silicate	684-84-5	1.0	6.0	----	----	----	----	----
alpha-Methyl styrene	98-83-9	50	240	100	485	----	----	----
Mevinphos (see Phosdrin)	----	----	----	----	----	----	----	----
Metribuzin	21087-64-9	----	5.0	----	----	----	----	----
Mica (see Silicates)	----	----	----	----	----	----	----	----
Molybdenum (as Mo)	7439-98-7
Soluble compounds	----	----	5.0	----	----	----	----	----
Insoluble compounds
Total dust	----	----	----	10	----	----	----	----
Monocrotophos (Azodrin)	6923-22-4	----	0.25	----	----	----	----	----
Monomethyl aniline	100-61-8	0.5	2.0	----	----	----	----	X
Monomethyl hydrazine	----	----	----	----	----	0.2	0.35	----
Morpholine	110-91-8	20	70	30	105	----	----	X
Naled	300-76-5	----	3.0	----	----	----	----	X
Naphtha (Coal tar)	8030-30-6	100	400	----	----	----	----	X
Naphthalene	91-20-3	10	50	15	75	----	----	----
alpha-Naphthylamine (see WAC 296-62-073)	134-32-7	----	----	----	----	----	----	----
beta-Naphthylamine (see WAC 296-62-073)	91-59-8	----	----	----	----	----	----	----
Neon	7440-01-9	Simple	Asphyxiant	----	----	----	----	----
Nickel carbonyl (as Ni)	13463-39-3	0.001	0.007	----	----	----	----	----
Nickel (as Ni)	7440-02-0
Metal and insoluble compounds		----	1.0	----	----	----	----	----
Soluble compounds		----	0.1	----	----	----	----	----
Nicotine	54-11-5	----	0.5	----	----	----	----	X
Nitrapyrin (see 2-Chloro-6 trichloromethyl pyridine)	1929-82-4	----	----	----	----	----	----	----
Total dust		----	10	----	----	----	----	----
Respirable fraction		----	5.0^k	----	----	----	----	----
Nitric acid	7697-37-2	2.0	5.0	4.0	10	----	----	----
Nitric oxide	10102-43-9	25	30	----	----	----	----	----
p-Nitroaniline	100-01-6	----	3.0	----	----	----	----	X
Nitrobenzene	98-95-3	1.0	5.0	----	----	----	----	X
4-Nitrobiphenyl (see WAC 296-62-073)	92-93-3	----	----	----	----	----	----	----
p-Nitrochlorobenzene	100-00-5	----	0.5	----	----	----	----	X
4-Nitrodiphenyl (see WAC 296-62-073)	----	----	----	----	----	----	----	----
Nitroethane	79-24-3	100	310	----	----	----	----	----
Nitrogen	7727-37-9	Simple	Asphyxiant	----	----	----	----	----
Nitrogen dioxide	10102-44-0	----	----	1.0	1.8	----	----	----
Nitrogen trifluoride	7783-54-2	10	29	----	----	----	----	----
Nitroglycerin	55-63-0	----	----	----	0.1	----	----	X
Nitromethane	75-52-5	100	250	----	----	----	----	----
1-Nitropropane	108-03-2	25	90	----	----	----	----	----
2-Nitropropane	79-46-9	10	35	----	----	----	----	----
N-Nitrosodimethylamine (see WAC 296-62-073)	62-75-9	----	----	----	----	----	----	----
Nitrotoluene
o-isomer	88-72-2	2.0	11	----	----	----	----	X
m-isomer	98-08-2	2.0	11	----	----	----	----	X
p-isomer	99-99-0	2.0	11	----	----	----	----	X
Nitrotirchloromethane (see Chloropicrin)	----	----	----	----	----	----	----	----
Nitrous Oxide (Nitrogen oxide)	10024-97-2	50	90	----	----	----	----	----
Nonane	111-84-2	200	1,050	----	----	----	----	----
Octachloronaphthalene	2234-13-1	----	0.1	----	0.3	----	----	X
Octane	111-65-9	300	1,450	375	1,800	----	----	----
Oil mist, mineral (particulate)	8012-95-1	----	5.0	----	----	----	----	----
Osmium tetroxide (as Os)	20816-12-0	0.0002	0.002	0.0006	0.006	----	----	----
Oxalic acid	144-62-7	----	1.0	----	2.0	----	----	----
Oxygen difluoride	7783-41-7	----	----	----	----	0.05	0.1	----
Ozone	10028-15-6	0.1	0.2	0.3	0.6	----	----	----
Paraffin wax fume	8002-74-2	----	2.0	----	----	----	----	----
Paraquat (Respirable dust)	4685-14-7	----	0.1^k	----	----	----	----	X
	1910-42-5
	2074-50-2
Parathion	56-38-2	----	0.1	----	----	----	----	X
Particulate polycyclic aromatic hydrocarbons (see coal tar pitch volatiles)	----	----	----	----	----	----	----	----
Particulates not otherwise regulated (see WAC 296-62-07510)
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Pentaborane	19624-22-7	0.005	0.01	0.015	0.03	----	----	----
Pentachloronaphthalene	1321-64-8	----	0.5	----	----	----	----	X
Pentachlorophenol	87-86-5	----	0.5	----	----	----	----	X
Pentaerythritol	115-77-5
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Pentane	109-66-0	600	1,800	750	2,250	----	----	----
2-Pentanone (methyl propyl ketone)	107-87-9	200	700	250	875	----	----	----
Perchloroethylene (tetrachloroethylene)	127-18-4	25	170	----	----	----	----	----
Perchloromethyl mercaptan	594-42-3	0.1	0.8	----	----	----	----	----
Perchloryl fluoride	7616-94-6	3.0	14	6.0	28	----	----	----
Perlite
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Petroleum distillates (Naptha) (Rubber Solvent)	----	100	400	----	----	----	----	----
Phenol	108-95-2	5.0	19	----	----	----	----	X
Phenothiazine	92-84-2	----	5.0	----	----	----	----	X
p-Phenylene diamine	106-50-3	----	0.1	----	----	----	----	X
Phenyl ether (vapor)	101-84-8	1.0	7.0	----	----	----	----	----
Phenyl ether-diphenyl mixture (vapor)	----	1.0	7.0	----	----	----	----	----
Phenylethylene (see Styrene)	----	----	----	----	----	----	----	----
Phenyl glycidyl ether (PGE)	122-60-1	1.0	6.0	----	----	----	----	----
Phenylhydrazine	100-63-0	5.0	20	10	45	----	----	X
Phenyl mercaptan	108-98-5	0.5	2.0	----	----	----	----	----
Phenylphosphine	638-21-1	----	----	----	----	0.05	0.25	----
Phorate	298-02-2	----	0.05	----	0.2	----	----	X
Phosdrin (Mevinphos)	7786-34-7	0.01	0.1	0.03	0.3	----	----	X
Phosgene (carbonyl chloride)	75-44-5	0.1	0.4	----	----	----	----	----
Phosphine	7803-51-2	0.3	0.4	1.0	1.0	----	----	----
Phosphoric acid	7664-38-2	----	1.0	----	3.0	----	----	----
Phosphorus (yellow)	7723-14-0	----	0.1	----	----	----	----	----
Phosphorous oxychloride	10025-87-3	0.1	0.6	----	----	----	----	----
Phosphorus pentachloride	10026-13-8	0.1	1.0	----	----	----	----	----
Phosphorus pentasulfide	1314-80-3	----	1.0	----	3.0	----	----	----
Phosphorus trichloride	7719-12-2	0.2	1.5	0.5	3.0	----	----	----
Phthalic anhydride	85-44-9	1.0	6.0	----	----	----	----	----
m-Phthalodinitrile	626-17-5	----	5.0	----	----	----	----	----
Picloram	1918-02-1
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Picric acid	88-89-1	----	0.1	----	----	----	----	X
Pindone (2-Pivalyl-1, 3-indandione)	83-26-1	----	0.1	----	----	----	----	----
Piperazine dihydrochloride	142-64-3	----	5.0	----	----	----	----	----
Pival(see Pindone)	----	----	----	----	----	----	----	----
Plaster of Paris	26499-65-0
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Platinum (as Pt)	7440-06-4
Metal	----	----	1.0	----	----	----	----	----
Soluble salts	----	----	0.002	----	----	----	----	----
Polychlorobiphenyls (see Chlorodiphenyls)	----	----	----	----	----	----	----	----
Portland cement	65997-15-1
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Potassium hydroxide	1310-58-3	----	----	----	----	----	2.0	----
Propane	74-98-6	1,000	1,800	----	----	----	----	----
Propargyl alcohol	107-19-7	1.0	2.0	----	----	----	----	X
beta-Propiolactone (see WAC 296-62-073)	57-57-8	----	----	----	----	----	----	----
Propionic acid	79-09-4	10	30	----	----	----	----	----
Propoxur (Baygon)	114-26-1	----	0.5	----	----	----	----	----
n-Propyl acetate	109-60-4	200	840	250	1,050	----	----	----
n-Propyl alcohol	71-23-8	200	500	250	625	----	----	X
n-Propyl nitrate	627-13-4	25	105	40	170	----	----	----
Propylene	----	Simple	Asphyxiant	----	----	----	----	----
Propylene dichloride (1, 2-Dichloropropane)	78-87-5	75	350	110	510	----	----	----
Propylene glycol dinitrate	6423-43-4	0.05	0.3	----	----	----	----	X
Propylene glycol monomethyl ether	107-98-2	100	360	150	540	----	----	----
Propylene imine	75-55-8	2.0	5.0	----	----	----	----	X
Propylene oxide	75-56-9	20	50	----	----	----	----	----
Propyne (see Methyl acetylene)	----	----	----	----	----	----	----	----
Pyrethrum	8003-34-7	----	5.0	----	----	----	----	----
Pyridine	110-86-1	5.0	15	----	----	----	----	----
Quinone	106-51-4	0.1	0.4	----	----	----	----	----
RDX (see Cyclonite)	----	----	1.5	----	----	----	----	X
Resorcinol	108-46-3	10	45	20	90	----	----	----
Rhodium (as Rh)	7440-16-6
Insoluble compounds, Metal fumes and dusts	----	----	----	0.1	----	----	----	----
Soluble compounds, salts	----	----	0.001	----	----	----	----	----
Ronnel	299-84-3	----	10	----	----	----	----	----
Rosin core solder, pyrolysis products (as formaldehyde)	----	----	0.1	----	----	----	----	----
Rotenone	83-79-4	----	5.0	----	----	----	----	----
Rouge
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Rubber solvent (naphtha)	8002-05-9	100	400	----	----	----	----	----
Selenium compounds (as Se)	7782-49-2	----	0.2	----	----	----	----	----
Selenium hexafluoride (as Se)	7783-79-1	0.05	0.2	----	----	----	----	----
Sesone (see Crag herbicide)	----	----	----	----	----	----	----	----
Silane (see Silicon tetrahydride)	----	----	----	----	----	----	----	----
Silica, amorphous, precipitated and gel	112926-00-8	----	6.0	----	----	----	----	----
Silica, amorphous, diatomaceous earth, containing less than 1% crystalline silica	61790-53-2
Total dust	----	----	6.0	----	----	----	----	----
Respirable fraction	----	----	3.0^k	----	----	----	----	----
Silica, crystalline cristobalite, respirable dust	14464-46-1	----	0.05^k	----	----	----	----	----
Silica, crystalline quartz, respirable dust	14808-60-7	----	0.1 ^k	----	----	----	----	----
Silica, crystalline tripoli (as quartz), respirable dust	1317-95-9	----	0.1^k	----	----	----	----	----
Silica, crystalline tridymite, respirable dust	15468-32-3	----	0.05^k	----	----	----	----	----
Silica, fused, respirable dust	60676-86-0	----	0.1^k	----	----	----	----	----
Silicates (less than 1% crystalline silica )
Mica (Respirable dust)	12001-26-2	----	3.0^k	----	----	----	----	----
Soapstone, Total dust	----	----	6.0	----	----	----	----	----
Soapstone, Respirable dust	----	----	3.0^k	----	----	----	----	----
Talc (containing asbestos): use asbestos limit (see WAC 296-62-07705)	----	----	----	----	----	----	----	----
Talc (containing no asbestos), Respirable dust	14807-96-6	----	2.0^k	----	----	----	----	----
Tremolite (see WAC 296-62-07705)	----	----	----	----	----	----	----	----
Silicon	7440-21-3
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Silicon Carbide	409-21-2
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Silicon tetrahydride	7803-62-5	5.0	7.0	----	----	----	----	----
Silver, metal dust and soluble compounds (as Ag)	7440-22-4	----	0.01	----	----	----	----	----
Soapstone (see Silicates)	----	----	----	----	----	----	----	----
Sodium azide	26628-22-8
(as HN3)	----	----	----	----	----	0.1	0.3	X
(as NaN3)	----	----	----	----	----	0.1	0.3	X
Sodium bisulfite	7631-90-5	----	5.0	----	----	----	----	----
Sodium-2, 4-dichlorophenoxyethyl sulfate (see Crag herbicide)	----	----	----	----	----	----	----	----
Sodium fluoroacetate	62-74-8	----	0.05	----	0.15	----	----	X
Sodium hydroxide	1310-73-2	----	----	----	----	----	2.0	----
Sodium metabisulfite	7681-57-4	----	5.0	----	----	----	----	----
Starch	9005-25-8
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Stibine	7803-52-3	0.1	0.5	----	----	----	----	----
Stoddard solvent	8052-41-3	100	525	----	----	----	----	----
Strychnine	57-24-9	----	0.15	----	----	----	----	----
Styrene	100-42-5	50	215	100	425	----	----	----
Subtilisins	9014-01-1	----	----	----	0.00006	----	----	----
					(60min.) ⁱ
Sucrose	57-50-1
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Sulfotep (see TEDP)	----	----	----	----	----	----	----	X
Sulfur dioxide	7446-09-5	2.0	5.0	5.0	13	----	----	----
Sulfur hexafluoride	2551-62-4	1,000	6,000	----	----	----	----	----
Sulfuric acid	7664-93-9	----	1.0	----	----	----	----	----
Sulfur monochloride	10025-67-9	----	----	----	----	1.0	6.0	----
Sulfur pentafluoride	5714-22-1	----	----	----	----	0.01	0.1	----
Sulfur tetrafluoride	7783-60-0	----	----	----	----	0.1	0.4	----
Sulfuryl fluoride	2699-79-8	5.0	20	10	40	----	----	----
Sulprofos	35400-43-2	----	1.0	----	----	----	----	----
Systox (see Demeton)	----	----	----	----	----	----	----	----
2, 4, 5-T	93-76-5	----	10	----	----	----	----	----
Talc (see Silicates)	----	----	----	----	----	----	----	----
Tantalum Metal and oxide dusts	7440-25-7	----	5.0	----	----	----	----	----
TEDP (Sulfotep)	3689-24-5	----	0.2	----	----	----	----	X
Tellurium and compounds (as Te)	13494-80-9	----	0.1	----	----	----	----	----
Tellurium hexafluoride (as Te)	7783-80-4	0.02	0.2	----	----	----	----	----
Temephos	3383-96-8
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
TEPP	107-49-3	0.004	0.05	----	----	----	----	X
Terphenyls	26140-60-3	----	----	----	----	0.5	5.0	----
1, 1, 1, 2-Tetrachloro-2, 2-difluoroethane	76-11-0	500	4,170	----	----	----	----	----
1, 1, 2, 2-Tetrachloro-1, 2-difluoroethane	76-12-0	500	4,170	----	----	----	----	----
1, 1, 2, 2-Tetrachloroethane	79-34-5	1.0	7.0	----	----	----	----	X
Tetrachloroethylene (see Perchloroethylene)	----	----	----	----	----	----	----	----
Tetrachloromethane (see Carbon tetrachloride)	----	----	----	----	----	----	----	----
Tetrachloronaphhalene	1335-88-2	----	2.0	----	----	----	----	X
Tetraethyl lead (as Pb)	78-00-2	----	0.075	----	----	----	----	X
Tetrahydrofuan	109-99-9	200	590	250	735	----	----	----
Tetramethyl lead (as Pb)	75-74-1	----	0.075	----	----	----	----	X
Tetramethyl succinonitrile	3333-52-6	0.5	3.0	----	----	----	----	X
Tetranitromethane	509-14-8	1.0	8.0	----	----	----	----	----
Tetrasodium pyrophosphate	7722-88-5	----	5.0	----	----	----	----	----
Tetryl (2, 4, 6-trinitrophenyl- methylnitramine)	479-45-8	----	1.5	----	----	----	----	X
Thallium (soluble compounds) (as Tl)	7440-28-0	----	0.1	----	----	----	----	X
4, 4-Thiobis (6-tert-butyl-m-cresol)	96-69-5
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Thioglycolic acid	68-11-1	1.0	4.0	----	----	----	----	X
Thionyl chloride	7719-09-7	----	----	----	----	1.0	5.0	----
Thiram (see WAC 296-62-07519)	137-26-8	----	5.0	----	----	----	----	----
Tin (as Sn) Inorganic compounds (except oxides)	7440-31-5	----	2.0	----	----	----	----	----
Tin, Organic compounds (as Sn)	7440-31-5	----	0.1	----	----	----	----	X
Tin Oxide (as Sn)	21651-19-4	----	2.0	----	----	----	----	----
Titanium dioxide	13463-67-7
Total dust	----	----	10	----	----	----	----	----
Toulene	108-88-3	100	375	150	560	----	----	----
Toluene-2, 4-diisocyanate (TDI)	584-84-9	0.005	0.04	0.02	0.15	----	----	----
m-Toluidine	108-44-1	2.0	9.0	----	----	----	----	X
o-Toluidine	95-53-4	2.0	9.0	----	----	----	----	X
p-Toluidine	106-49-0	2.0	9.0	----	----	----	----	X
Toxaphene (see Chlorinated camphene)	----	----	----	----	----	----	----	----
Tremolite (see Silicates)	----	----	----	----	----	----	----	----
Tributyl phosphate	126-73-8	0.2	2.5	----	----	----	----	----
Trichloroacetic acid	76-03-9	1.0	7.0	----	----	----	----	----
1, 2, 4-Trichlorobenzene	120-82-1	----	----	----	----	5.0	40	----
1, 1, 1-Trichloroethane (see Methyl chloroform)	----	----	----	----	----	----	----	----
1, 1, 2-Trichloroethane	79-00-5	10	45	----	----	----	----	----
Trichloroethylene	79-01-6	50	270	200	1,080	----	----	----
Trichlorofluoromethane	75-69-4	----	----	----	----	1,000	5,600	----
Trichloromethane (see Chloroform)	----	----	----	----	----	----	----	----
Trichloronaphthalene	1321-65-9	----	5.0	----	----	----	----	X
1, 2, 3-Trichloropropane	96-18-4	10	60	----	----	----	----	X
1, 1, 2-Trichloro-1, 2, 2-trifluoroethane	76-13-1	1,000	7,600	1,250	9,500	----	----	----
Tricyclohexyltin hydroxide (see Cyhexatin)	----	----	----	----	----	----	----	----
Triethylamine	121-44-8	10	40	15	60	----	----	----
Trifluorobromomethane	75-63-8	1,000	6,100	----	----	----	----	----
Trimellitic anhydride	552-30-7	0.005	0.04	----	----	----	----	----
Trimethylamine	75-50-3	10	24	15	36	----	----	----
Trimethyl benzene	25551-13-7	25	125	----	----	----	----	----
Trimethyl phosphite	121-45-9	2.0	10	----	----	----	----	----
2, 4, 6-Trinitrophenol (see Picric acid)	----	----	----	----	----	----	----	----
2, 4, 6-Trinitrophenyl- methylnitramine (see Tetryl)	----	----	----	----	----	----	----	----
2, 4, 6-Trinitrotoluene (TNT)	118-96-7	----	0.5	----	----	----	----	X
Triorthocresyl phosphate	78-30-8	----	0.1	----	----	----	----	X
Triphenyl amine	603-34-9	----	5.0	----	----	----	----	----
Triphenyl phosphate	115-86-6	----	3.0	----	----	----	----	----
Tungsten (as W)	7440-33-7
Soluble compounds	----	----	1.0	----	3.0	----	----	----
Insoluble compounds	----	----	5.0	----	10	----	----	----
Turpentine	8006-64-2	100	560	----	----	----	----	----
Uranium (as U)	7440-61-1
Soluble compounds	----	----	0.05	----	----	----	----	----
Insoluble compounds	----	----	0.2	----	0.6	----	----	----
n-Valeraldehyde	110-62-3	50	175	----	----	----	----	----
Vanadium (as V2O5)	1314-62-1	----	0.05	----	----	----	----	----
Respirable dust and fume
Vegetable oil mist
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Vinyl acetate	108-05-1	10	30	20	60	----	----	----
Vinyl benzene (see Styrene)	----	----	----	----	----	----	----	----
Vinyl bromide	593-60-2	5.0	20	----	----	----	----	----
Vinyl chloride (see WAC 296-62-07329)	75-01-4	----	----	----	----	----	----	----
Vinyl cyanide (see Acrylonitrile)	----	----	----	----	----	----	----	----
Vinyl cyclohexene dioxide	106-87-6	10	60	----	----	----	----	X
Vinyl toluene	25013-15-4	50	240	----	----	----	----	----
Vinylidene chloride (1, 1-Dichloroethylene)	75-35-4	1.0	4.0	----	----	----	----	----
VM & P Naphtha	8032-32-4	300	1,350	400	1,800	----	----	----
Warfarin	81-81-2	----	0.1	----	----	----	----	----
Welding fumes ^f (total particulate)	----	----	5.0	----	----	----	----	----
Wood dust
Nonallergenic; All soft woods and hard woods except allergenics	----	----	5.0	----	10	----	----	----
Allergenics; (e.g. cedar, mahogany and teak)	----	----	2.5	----	----	----	----	----
Xylenes (Xylol) (o-, m-, p-isomers)	1330-20-7	100	435	150	655	----	----	----
m-Xylene alpha, alpha-diamine	1477-55-0	----	----	----	----	----	0.1	X
Xylidine	1300-73-8	2.0	10	----	----	----	----	X
Yttrium	7440-65-5	----	1.0	----	----	----	----	----
Zinc chloride fume	7646-85-7	----	1.0	----	2.0	----	----	----
Zinc chromate (as Cr03)	Varies with compound	----	0.05	----	----	----	0.1	----
Zinc oxide	1314-13-2
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Zinc oxide fume	1314-13-2	----	5.0	----	10	----	----	----
Zinc stearate	557-05-1
Total dust	----	----	10	----	----	----	----	----
Respirable fraction	----	----	5.0^k	----	----	----	----	----
Zirconium compounds (as Zr)	7440-67-2	----	5.0	----	10	----	----	----

Notes: a Parts of vapor or gas per million parts of contaminated air by volume at 25 degrees C and 760 mm Hg pressure (torr).

b Milligrams of substance per cubic meter of air. When a numerical entry for a substance is in the mg/m³ column and not in the ppm column, then the number in the mg/m³ column is exact. When numerical entries for a substance are in both the ppm and mg/m³ columns, then the number in the ppm column is exact and the number in the mg/m³ column may be rounded off.

c Duration is for 15 minutes, unless otherwise noted.

d The final benzene standard in WAC 296-62-07523 applies to all occupational exposures to benzene except some sub-segments of industry where exposures are consistently under the action level (i.e., distribution and sale of fuels, sealed containers and pipelines, coke production, oil and gas drilling and production, natural gas processing, and the percentage exclusion for liquid mixtures).

e This 8-hour TWA applies to respirable dust as measured by a vertical elutriator cotton dust sampler or equivalent instrument. The time-weighted average applies to the cotton waste processing operations of waste recycling (sorting, blending, cleaning, and willowing) and garretting. See also WAC 296-62-14533 for cotton dust limits applicable to other sectors.

f As determined from breathing-zone air samples.

g Both concentration and percent quartz for the application of this limit are to be determined from the fraction passing a size-selector with the following characterstics:

Aerodynamic diameter
(unit_density_sphere)

Percent_passing_selector

1 97

2 91

3 74

4 50

5 30

6 17

7 9

8 5

10 1

h The CAS number is for information only. Enforcement is based on the substance name. For an entry covering more than one metal compound measured as the metal, the CAS number for the metal is given -- not CAS numbers for the individual compound s.

i Compliance with the subtilisins PEL is assessed by sampling with a high volume sampler (600-800 liters per minute) for at least 60 minutes.

j Sampling for the carbon monoxide ceiling shall be averaged over 5 minutes but an instantaneous reading over 1500 ppm shall not be exceeded.

k The concentration of respirable particulate for the application of this limit is determined from the fraction passing a size-selector with the following characteristics.

Aerodynamic diameter
(unit density sphere)

Percent passing selector

1 97

2 91

3 74

4 50

5 30

6 17

7 9

8 5

10 1

[Statutory Authority: RCW 49.17.040, [49.17].050 and [49.17].060. 98-10-029, § 296-62-07515, filed 4/24/98, effective 7/24/98; 97-19-014, § 296-62-07515, filed 9/5/97, effective 11/5/97. Statutory Authority: Chapter 49.17 RCW. 96-17-056, § 296-62-07515, filed 8/20/96, effective 10/15/96; 93-01-067 (Order 92-15), § 296-62-07515, filed 12/11/92, effective 1/15/93; 91-11-070 (Order 91-01), § 296-62-07515, filed 5/20/91, effective 6/20/91; 90-03-029 (Order 89-20), § 296-62-07515, filed 1/11/90, effective 2/26/90; 89-15-002 (Order 89-06), § 296-62-07515, filed 7/6/89, effective 8/7/89; 88-14-108 (Order 88-11), § 296-62-07515, filed 7/6/88; 87-24-051 (Order 87-24), § 296-62-07515, filed 11/30/87. Statutory Authority: RCW 49.17.040 and 49.17.050. 86-16-009 (Order 86-28), § 296-62-07515, filed 7/25/86; 85-01-022 (Order 84-24), § 296-62-07515, filed 12/11/84; 82-13-045 (Order 82-22), § 296-62-07515, filed 6/11/82. Statutory Authority: RCW 49.17.040, 49.17.050 and 49.17.240. 81-16-015 (Order 81-20), § 296-62-07515, filed 7/27/81; 80-11-010 (Order 80-14), § 296-62-07515, filed 8/8/80. Statutory Authority: RCW 49.17.040, 49.17.150 and 49.17.240. 79-08-115 (Order 79-9), § 296-62-07515, filed 7/31/79; Order 73-3, § 296-62-07515, filed 5/7/73.]

AMENDATORY SECTION(Amending WSR 99-17-026, filed 8/10/99, effective 11/10/99)

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.

(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 supplied-air 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.

(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.

(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.

(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, representative area air monitoring must be conducted for comparison to clearance monitoring as required by ((~~WAC 296-62-07709 (3)(g)~~)) subsection (3)(h) of this section. Preabatement air monitoring is not required for outdoor work ((~~(see WAC 296-62-07712 (5)(c))~~)).

(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.

(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 fifteen working days 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 49.17.040, 49.17.050, 49.26.040 and 49.26.130. 99-17-026, § 296-62-07709, filed 8/10/99, 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.]

AMENDATORY SECTION(Amending WSR 99-17-026, filed 8/10/99, effective 11/10/99)

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.

(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 time-weighted 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) ((~~Clean-up.~~

~~(a) After completion of asbestos work, all surfaces in and around the work area must be cleared of asbestos debris.~~

~~(b) Encapsulant must be applied to all areas where asbestos has been removed to ensure binding of any remaining fibers.~~

~~(c) The employer must demonstrate by monitoring that the airborne fiber concentration is below:~~

~~• The permissible exposure limits; or~~

~~• At or below the airborne fiber level existing prior to the start of the asbestos work; whichever level is lower.~~

~~(3)~~)) 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.

(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.

((~~(4)~~)) (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 ((~~set out~~)) in WAC 296-62-07745, Appendix F ((~~to this section~~)). The employer may also comply using an equivalent method which follows written procedures which the employer demonstrates can achieve results equivalent to Method ((~~A in~~)) (1) Negative pressure enclosure/HEPA vacuum system method in WAC 296-62-07745, Appendix F ((~~to this section~~)). For facilities in which no more than 5 pair of brakes or 5 clutches are inspected, disassembled, repaired, or assembled per week, ((~~the method set forth in~~)) (4) Wet method in WAC 296-62-07745, Appendix F ((~~to this section~~)) 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 ((~~set out~~)) in WAC 296-62-07745, Appendix F ((~~to this section~~)).

[Statutory Authority: RCW 49.17.040, 49.17.050, 49.26.040, and 49.26.130. 99-17-026, § 296-62-07713, filed 8/10/99, 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.]

AMENDATORY SECTION(Amending WSR 99-17-026, filed 8/10/99, effective 11/10/99)

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.

(3) Asbestos projects.

(a) Class I ((~~and Class II~~)) 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

(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 asbestos-containing 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, asbestos-containing 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.

(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 296-62 WAC, Part E (see WAC 296-62-07117, 296-62-07172, and 296-62-07186 through 296-62-07190).

(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 asbestos-containing 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.

(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 49.17.040, 49.17.050, 49.26.040 and 49.26.130. 99-17-026, § 296-62-07722, filed 8/10/99, effective 11/10/99. Statutory Authority: RCW 49.17.010, [49.17].040 and [49.17].050. 99-10-071, § 296-62-07722, filed 5/4/99, effective 9/1/99. 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.]

AMENDATORY SECTION(Amending WSR 97-01-079, filed 12/17/96, effective 3/1/97)

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;

(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 WAC 296-62-052.

(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)(c)~~)) (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.

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 WAC 296-62-052.

(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;

(iii) Any employee medical complaints related to exposure to asbestos;

(iv) A copy of the information provided to the physician as required by WAC 296-62-07725(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 WAC 296-62-052.

(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 WAC 296-62-05201 through 296-62-05209 and 296-62-05213 through 296-62-05217.

(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 WAC 296-62-052.

(6) Transfer of records.

(a) The employer shall comply with the requirements concerning transfer of records set forth in WAC 296-62-05215.

(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 49.17.040, [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.]

AMENDATORY SECTION(Amending WSR 97-01-079, filed 12/17/96, effective 3/1/97)

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 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)((~~(b)~~)) and disposed of according to WAC ((~~296-62-07713 (1)(a) and (2)(f)~~)) 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 ((~~296-62-07713 (1)(a) and (2)(f)~~)) 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 asbestos-containing brake dust from becoming airborne.

(d) After removing the brake drum, the wheel hub and back of the brake assembly shall be thoroughly wetted to suppress dust.

(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)((~~(b)~~)) and disposed of according to WAC ((~~296-62-07713 (1)(a) and (2)(f)~~)) 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 ((~~296-62-07713 (1)(a) and (2)(f)~~)) 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)((~~(b)~~)) and then disposed of according to WAC ((~~296-62-07713 (1)(a) and (2)(f)~~)) 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 ((~~296-62-07713 (1)(a) and (2)(f)~~)) 296-62-07723.

(d) The use of dry brushing during the wet method operations is prohibited.

[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.]

OTS-3621.1

AMENDATORY SECTION(Amending WSR 99-17-026, filed 8/10/99, effective 11/10/99)

WAC 296-65-003
Definitions.

Unless the context clearly requires otherwise, the definitions in this section apply throughout this standard.

"Approved" means approved by the department.

"Asbestos" includes chrysotile, amosite, crocidolite, tremolite asbestos, anthophyllite asbestos, and actinolite asbestos, and any of these minerals that have been chemically treated and/or altered.

"Asbestos fiber" means asbestos fiber as defined in WAC 296-62-07703 as "fiber."

"Asbestos abatement project" means an asbestos project involving three square feet or three linear feet, or more, of asbestos containing material.

"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.

"Certified asbestos contractor" means any partnership, firm, association, corporation or sole proprietorship, registered under chapter 18.27 RCW, that submits a bid, or contracts to remove or encapsulate asbestos for another and is certified by the department to remove or encapsulate asbestos.

"Certificate" means a certificate issued by the department that shall include the name of person awarded the certificate, certificate number, the discipline for which certification was conferred, training and examination dates, the course provider's name and address, and the course provider's telephone number, expiration date, and a statement that the person receiving the certificate has completed the training for asbestos accreditation under TSCA Title II.

"Certified asbestos supervisor" means an individual who is certified by the department under WAC 296-65-012.

"Certified asbestos worker" means an individual certified by the department under WAC 296-65-010.

"Department" means the department of labor and industries.

"Demolition" means the activity of razing a structure which includes the wrecking, removal, or dismantling of any load-supporting structural member of any facility including any related handling operations.

"Director" means the director of the department of labor and industries or the director's designee.

"Emergency project" means a project that was not planned but results from a sudden, unexpected event and does not include((s)) operations ((~~which~~)) that are necessitated by nonroutine failures of equipment or systems.

"Encapsulation" means the application of an encapsulant to asbestos containing materials to control the release of asbestos fibers into the air. The encapsulation process either creates a membrane over the surface (bridging encapsulant) or penetrates the material and binds its components together (penetrating encapsulant).

"EPA MAP" means the environmental protection agency model accreditation plan for asbestos requirements in 40 CFR Part 763.

"HEPA filtration" means high-efficiency particulate air filtration found in respirators and vacuum systems capable of filtering 0.3 micron particles with 99.97% efficiency.

"Intact" means that the asbestos containing material has not crumbled, been pulverized, or otherwise deteriorated so that it is no longer likely to be bound with its matrix.

"NESHAP" means the National Emission Standards for Hazardous Air Pollutants.

"Owner" means the person who owns any public or private building, structure, facility, or mechanical system, or the remnants thereof, or 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.

"Person" means any individual, partnership, firm, association, corporation, sole proprietorship, or the state of Washington or its political subdivisions.

"Revocation" means a permanent withdrawal of a certification issued by the department.

"Suspension" means a temporary withdrawal of a certification issued by the department. No suspension shall be less than six months or longer than one year.

[Statutory Authority: RCW 49.17.040, 49.17.050, 49.26.040 and 49.26.130. 99-17-026, § 296-65-003, filed 8/10/99, effective 11/10/99. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 96-05-056, § 296-65-003, filed 2/16/96, effective 4/1/96. Statutory Authority: Chapter 49.17 RCW. 89-21-018 (Order 89-10), § 296-65-003, filed 10/10/89, effective 11/24/89; 87-24-051 (Order 87-24), § 296-65-003, filed 11/30/87. Statutory Authority: SSB 4209, 1985 c 387. 85-21-080 (Order 85-30), § 296-65-003, filed 10/22/85.]

•	Deleted redundant clean-up requirements in subsection (2). Based on the history of these requirements, we found that they relate to construction activities and were originally located in chapter 296-155 WAC. When we combined the asbestos rules into one standard, the clean-up requirements went in WAC 296-62-07723 Housekeeping, but were not removed from WAC 296-62-07713(2).
•	Changed numbering of subsections.
•	In subsection (4), changed references to Appendix F; changed reference to Method A to read "Method (1) negative pressure enclosure/HEPA vacuum system" to accurately reference method in Appendix F; and clarified when employers may use Method (4) Wet method instead of Method (1).

Aerodynamic diameter (unit_density_sphere)	Percent_passing_selector
1	97
2	91
3	74
4	50
5	30
6	17
7	9
8	5
10	1

j	Sampling for the carbon monoxide ceiling shall be averaged over 5 minutes but an instantaneous reading over 1500 ppm shall not be exceeded.
k	The concentration of respirable particulate for the application of this limit is determined from the fraction passing a size-selector with the following characteristics.

Aerodynamic diameter (unit density sphere)	Percent passing selector
1	97
2	91
3	74
4	50
5	30
6	17
7	9
8	5
10	1

•	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.

•	Hands-on training in the use of respiratory protection and work practices, and
•	All the minimum elements of subsection (5) of this section.

•	Available information concerning the location of PACM, ACM, asbestos-containing 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.

•	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.

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