Original Notice.

     Preproposal statement of inquiry was filed as WSR 03-08-073.

     Title of Rule: Chapter 296-841 WAC, Respiratory hazards and WAC 296-62-075 Air contaminants.

     Purpose: The air contaminants rule is being rewritten and reorganized for clarity and ease of use for employers and employees. We are amending the rule in chapter 296-62 WAC to only apply to agriculture and proposing respiratory hazards in a new chapter.

AMENDED SECTIONS:

WAC 296-62-075 Air contaminants.

•     A note will be added to WAC 296-62-075 stating that requirements relating to air contaminants have been moved and the requirements left in WAC 296-62-075 only apply to agriculture.

NEW SECTIONS:

WAC 296-841-100 Scope.

•     Clarifies responsibilities of employers to identify and control respiratory hazards.

WAC 296-841-200 Evaluate and control employee exposures.

•     Clarifies responsibilities of employers to evaluate exposure to respiratory hazards.

WAC 296-841-20005 Identify and evaluate employee exposures.

•     Moved requirements from 296-62-07130 and 296-62-07515 to this section.

WAC 296-841-20010 Control employee exposures.

•     Moved requirements from 296-62-07102 and 296-62-07501 to this section.

WAC 296-841-20015 Use respirators.

•     Moved requirements from 296-62-07103 to this section.

WAC 296-841-20020 Notify employees.

•     Clarified requirements from RCW 49.17.220 in this section.

WAC 296-841-300 Definitions.

•     Moved the applicable definitions to this section.

     Statutory Authority for Adoption: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060.

     Statute Being Implemented: Chapter 49.17 RCW.

     Summary: The Department of Labor and Industries is proposing to clarify requirements relating to air contaminants. We are amending the rule in chapter 296-62 WAC to only apply to agriculture and proposing respiratory hazards in a new chapter. This rule making is part of our clear rule-writing initiative to rewrite for clarity all the safety and health 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 not necessitated by federal law, federal or state court decision.

     Explanation of Rule, its Purpose, and Anticipated Effects: The Department of Labor and Industries is proposing to clarify requirements relating to air contaminants. This rule making is part of our clear rule-writing initiative to rewrite for clarity all the safety and health rules. It is anticipated that these amendments will actually make the rules easier for employers and employees to understand and use, and thus actually save them time.

     Proposal does not change existing rules.

     No small business economic impact statement has been prepared under chapter 19.85 RCW. A number of criteria and exemptions were established by the small business economic impact statement (SBEIS) analysis. One key criteria that allows rule changes to be exempt from preparation of an SBEIS is presented in RCW 34.05.310 (4)(d): "Rules that only correct typographical errors, make address or name changes, or clarify language of a rule without changing its effect" are not subject to the SBEIS requirements. Because the proposed rule changes make clarifying and organizational changes for ease of understanding and use, but do not in any way alter the content of the original rules, there should not be an economical impact on Washington state business. The analysis of the rule reveals that in addition to not imposing new costs on businesses, these revisions will actually make WISHA rules easier for employers and employees to understand and use, and thus actually save them time.

     RCW 34.05.328 applies to this rule adoption. Significant rule-making criteria applies to the rule amendments but the department is exempt since the changes simply clarify the language of the rule without changing its effect, RCW 34.05.328 (5)(b)(iv).

     Hearing Location: Department of Labor and Industries Building, Room S117, 7273 Linderson Way S.W., Tumwater, WA, on June 26, 2003, at 1:30 p.m.

     Assistance for Persons with Disabilities: Contact Sally Elliot by June 19, 2003, at (360) 902-5484.

     Submit Written Comments to: Kimberly Rhoads, WISHA Services Division, P.O. Box 44620, Olympia, WA 98504-4620, e-mail rhok235@lni.wa.gov, fax (360) 902-5529, by July 3, 2003.

     Date of Intended Adoption: September 1, 2003.

May 19, 2003

Paul Trause

Director

OTS-6373.1

AMENDATORY SECTION(Amending WSR 97-19-014, filed 9/5/97, effective 11/5/97)

WAC 296-62-075   Air contaminants.  

Note:

The requirements in WAC 296-62-075 through 296-62-07515 apply only to agriculture. The requirements for all other industries relating to respiratory hazards have been moved to chapter 296-841 WAC, Respiratory hazards.

(1) An employee's exposure to any substance listed in Table 1 of WAC 296-62-07515 shall be limited in accordance with the requirements of WAC 296-62-07501 through 296-62-07513.

     (2) The following definitions are applicable to the limits in Table 1.

     (a) Time weighted average (TWA) is the employee's average airborne exposure to any 8-hour work shift of a 40-hour work week which shall not be exceeded.

     (b) Short term exposure limit (STEL) is the employee's 15-minute time weighted average exposure which shall not be exceeded at any time during a work day unless another time limit is specified in a parenthetical notation below the limit. If another time period is specified, the time weighted average exposure over that time period shall not be exceeded at any time during the working day.

     (c) Ceiling is the employee's exposure which shall not be exceeded during any part of the work day. If instantaneous monitoring is not feasible, then the ceiling shall be assessed as a 15-minute time weighted average exposure which shall not be exceeded at any time over a working day.

     (d) The terms "substance," "air contaminant," and "material" are equivalent in meaning for WAC 296-62-075 through 296-62-07515.

[Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 97-19-014, § 296-62-075, filed 9/5/97, effective 11/5/97. Statutory Authority: Chapter 49.17 RCW. 89-15-002 (Order 89-06), § 296-62-075, filed 7/6/89, effective 8/7/89; Order 73-3, § 296-62-075, filed 5/7/73.]

OTS-6261.2

     IMPORTANT:

     This chapter applies only if your employees:

     • Are exposed to a respiratory hazard

     OR

     • Could be exposed to one of the specific hazards listed below.

     This chapter applies to any workplace with potential or actual employee exposure to respiratory hazards. It requires you to protect employees from respiratory hazards by applying this protection strategy:

     • Evaluate employee exposures to determine if controls are needed

     • Use feasible controls. For example, enclose or confine the operation, use ventilation systems, or substitute with less toxic material

     • Use respirators if controls are not feasible or if they cannot completely control the hazard.

     Definition:

     Exposed or exposure:

     The contact an employee has with a toxic substance, harmful physical agent or oxygen deficient condition. Exposure can occur through various routes of entry, such as inhalation, ingestion, skin contact, or skin absorption.

     Permissible exposure limit (PEL):

     Permissible exposure limits (PELs) are employee exposures to toxic substances or harmful agents that must not be exceeded. PELs are specified in applicable WISHA rules.

Note:	Examples of substances that may be respiratory hazards when airborne include:
	• Chemicals listed in Table 3
	• Any substance
	– Listed in the latest edition of the NIOSH Registry of Toxic Effects of Chemical Substances
	– For which positive evidence of an acute or chronic health hazard exists through tests conducted by, or known to, the employer
	– That may pose a hazard to human health as stated on a material safety data sheet kept by, or known to, the employer
	• Atmospheres considered oxygen deficient
	• Biological agents such as harmful bacteria, viruses or fungi
	– Examples include airborne TB aerosols and anthrax
	• Pesticides with a label requirement for respirators
	• Chemicals used as crowd control agents such as pepper spray
	• Chemicals present at clandestine drug labs.
	These substances can be airborne as dusts, fibers, fogs, fumes, mists, gases, smoke, sprays, vapors, or aerosols.

Reference:	• Substances in Table 3 that are marked with an X in the "skin" column may require personal protective equipment (PPE). See WAC 296-800-160, Personal protective equipment, for additional information and requirements.
	• If any of the following hazards are present in your workplace, you will need both this chapter and any of the following specific rules that apply:

Hazard	Rule that applies
Acrylonitrile	WAC 296-62-07336
Arsenic (inorganic)	WAC 296-62-07347
Asbestos	WAC 296-62-077
Benzene	WAC 296-62-07523
Butadiene	WAC 296-62-07460
Cadmium	WAC 296-62-074
Carcinogens	Chapter 296-62 WAC, Part F
Coke ovens	Chapter 296-62 WAC, Part O
Cotton dust	Chapter 296-62 WAC, Part N
1, 2-Dibromo-3- chloropropane	WAC 296-62-07342
Ethylene oxide	WAC 296-62-07355
Formaldehyde	WAC 296-62-07540
Lead	WAC 296-62-07521
Methylene chloride	WAC 296-62-07470
Methylenedianiline	WAC 296-62-076
Thiram	WAC 296-62-07519
Vinyl chloride	WAC 296-62-07329

[]

     Summary

     Your responsibility:

     To protect your employees from exposure to respiratory hazards in the workplace by identifying and controlling the hazards.

     You must:

     Identify and evaluate employee exposures

     WAC 296-841-20005

     Control employee exposures

     WAC 296-841-20010

     Use respirators

     WAC 296-841-20015

     Notify employees

     WAC 296-841-20020.

[]

     You must:

     • Make sure employees are protected from potentially hazardous exposure while you perform your evaluation

     • Perform your evaluation without considering the protection provided to employees by a respirator

     • Determine the form of the hazard, such as dust, mist, gas, oxygen deficiency, biological.

     • Make sure you include:

     – Potential emergency and rescue situations that may occur, such as equipment or power failures, uncontrolled chemical reactions, fire, explosion, or human error

     – Workplace conditions such as work processes, types of material, control methods, work practices and environmental conditions.

     • Determine or reasonably estimate whether any employee is or could be exposed to any of the following:

     – Any airborne substance above the PEL listed in Table 3

     – A substance at or above its action level

     – Any other respiratory hazard.

     • Use any of the following to determine employee exposure:

     – Information that would allow an estimate of the level of employee exposure, such as MSDSs or pesticide labels, observations, measurements or calculations

     – Data demonstrating that a particular product, material or activity cannot result in employee exposure at or above the action level (AL) or PEL

     – Personal air samples that represent an employee's usual or worst case exposure for the entire shift.

Note:	• Rules for specific substances may contain additional requirements for determining employee exposure.
	• Use methods of sampling and analysis that have been validated by the laboratory performing the analysis.
	• Samples from a representative group of employees may be used for other employees performing the same work activities when the duration and level of exposure are similar.

     You must:

     • Consider the atmosphere to be immediately dangerous to life or health (IDLH) when you cannot determine or reasonably estimate employee exposure

     • Make sure employee exposure to two or more substances is evaluated using this formula:

Em

=

C1 L1

+

C2 L2

+

. . .

+

Cn Ln

The symbol	Is the . . .
E	Equivalent exposure for the mixture. The PEL is exceeded when the value of E is greater than 1.
C	Concentration of a particular contaminant.
L	PEL for that contaminant, from Table 3.

[]

     You must:

     • Use feasible controls to protect employees from exposure to respiratory hazards by:

     – Reducing the hazard to a level that removes the respiratory hazard

     – Reducing the hazard to the lowest achievable level, when the hazard cannot be removed.

     IMPORTANT:

     Using respirators and other PPE is not a substitute for the feasible controls required by this section.

     Note:

Table 1

Examples of Possible Controls

[]

     You must:

     • Require employees to use respiratory protection when respiratory hazards have not been removed using feasible controls. For example, use respirators at any of the following times:

     – While controls are being evaluated or put in place

     – When the respiratory hazard is not completely removed

     – When controls are NOT feasible.

     Reference:

     See chapter 296-842 WAC, Respirators, for respirator program requirements.

[]

     You must:

     • Notify employees who are or may be exposed to respiratory hazards as specified in Table 2.

Note:

• The notification may be provided either individually, to a group, or by posting of results in an appropriate location that is accessible to affected employees.

Table 2

Notification Requirements

     IMPORTANT:

     The following information applies to Table 3, Exposure Limits for Air Contaminants.

     • Exposure needs to be determined from personal air samples taken in the breathing zone OR monitoring representative of the employee's breathing zone.

     • Ppm refers to parts of vapor or gas per million parts of air by volume, at 25 degrees C and 760 mm Hg pressure.

     • Mg/m³ refers to milligrams of substance per cubic meter of air.

     • For a metal that is measured as the metal itself, only the CAS number for the metal is given. The CAS numbers for individual compounds of the metal are not provided.

     • Time weighted averages (TWA₈) represent the maximum allowed average exposure for any 8-hour time period. For work periods longer than 8-hours the TWA₈ needs to be determined using the 8 continuous hours with the highest average concentration.

     • Short-term exposure limits (STEL) represent maximum allowed average exposure for any fifteen-minute period, unless otherwise noted in Table 3.

     • The ceiling represents the maximum allowed exposure for the shortest time period that can feasibly be measured.

     • An "X" in the "skin" column indicates the substance can be absorbed through the skin, either by airborne or direct contact.

     • Additional requirements for the use of gloves, coveralls, goggles, and other personal protective equipment can be found in WAC 296-800-160.

     • The respirable fraction of particulate is measured by sampling with a size-selector having the following characteristics:

Mean aerodynamic diameter		Percent passing the selector
1		97
2		91
3		74
4		50
5		30
6		17
7		9
8		5
10		1

Substance	CAS	TWA8	STEL	Ceiling	Skin
Abate (Temephos)	3383-96-8	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Acetaldehyde	75-07-0	100 ppm	150 ppm	----	----
Acetic acid	64-19-7	10 ppm	20 ppm	----	----
Acetic anhydride	108-24-7	----	----	5 ppm	----
Acetone	67-64-1	750 ppm	1,000 ppm	----	----
Acetonitrile	75-05-8	40 ppm	60 ppm	----	----
2-Acetylaminofluorene      (see WAC 296-62-073)	53-96-3	----	----	----	----
Acetylene	74-86-2	Simple asphyxiant	----	----	----
Acetylene dichloride      (1,2-Dichloroethylene)	540-59-0	200 ppm	250 ppm	----	----
Acetylene tetrabromide	79-27-6	1 ppm	3 ppm	----	----
Acetylsalicylic acid      (Aspirin)	50-78-2	5 mg/m3	10 mg/m3	----	----
Acrolein	107-02-8	0.1 ppm	0.3 ppm	----	----
Acrylamide	79-06-1	0.03 mg/m3	0.09 mg/m3	----	X
Acrylic acid	79-10-7	10 ppm	20 ppm	----	X
Acrylonitrile      (see WAC 296-62-07336)	107-13-1	2 ppm	10 ppm	----	----
Aldrin	309-00-2	0.25 mg/m3	0.75 mg/m3	----	X
Allyl alcohol	107-18-6	2 ppm	4 ppm	----	X
Allyl chloride	107-05-1	1 ppm	2 ppm	----	----
Allyl glycidyl ether (AGE)	106-92-3	5 ppm	10 ppm	----	----
Allyl propyl disulfide	2179-59-1	2 ppm	3 ppm	----	----
alpha-Alumina      (Aluminum oxide)	1344-28-1	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5.0 mg/m3	10 mg/m3	----	----
Aluminum (as Al)	7429-90-5	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5.0 mg/m3	10.0 mg/m3	----	----
Pyro powders	----	5.0 mg/m3	10 mg/m3	----	----
Welding fumes	----	5 mg/m3	10 mg/m3	----	----
Soluble salts	----	2.0 mg/m3	4 mg/m3	----	----
Alkyls (NOC)	----	2.0 mg/m3	4 mg/m3	----	----
Aluminum oxide (Alundum,      Corundum)	7429-90-5	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5.0 mg/m3	10.0 mg/m3	----	----
4-Aminodiphenyl      (see WAC 296-62-073)	92-67-1	----	----	----	----
2-Aminoethanol      (Ethanolamine)	141-43-5	3 ppm	6 ppm	----	----
2-Aminopyridine	504-29-0	0.5 ppm	1.5 ppm	----	----
Amitrole	61-82-5	0.2 mg/m3	0.6 mg/m3	----	----
Ammonia	7664-41-7	25 ppm	35 ppm	----	----
Ammonium chloride, fume	12125-02-9	10 mg/m3	20 mg/m3	----	----
Ammonium sulfamate (Ammate)	7773-06-0	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5.0 mg/m3	10.0 mg/m3	----	----
n-Amyl acetate	628-63-7	100 ppm	150 ppm	----	----
sec-Amyl acetate	626-38-0	125 ppm	156 ppm	----	----
Aniline and homologues	62-53-3	2 ppm	4 ppm	----	X
Anisidine (o, p-isomers)	29191-52-4	0.1 ppm	0.3 ppm	----	X
Antimony and compounds (as Sb)	7440-36-0	0.5 mg/m3	1.5 mg/m3	----	----
ANTU      (alpha Naphthyl thiourea)	86-88-4	0.3 mg/m3	0.9 mg/m3	----	----
Argon	7440-37-1	Simple asphyxiant	Simple asphyxiant	----	----
Arsenic,      organic compounds (as As)	7440-38-2	0.2 mg/m3	0.6 mg/m3	----	----
Arsenic, inorganic      compounds (as As) (when      use is covered by WAC      296-62-07347)	7440-38-2	0.01 mg/m3	0.03 mg/m3	----	----
Arsenic, inorganic      compounds (as As)      (when use is not      covered by WAC      296-62-07347)	7440-38-2	0.2 mg/m3	0.6 mg/m3	----	----
Arsine	7784-42-1	0.05 ppm	0.15 ppm	----	----
Asbestos      (see WAC 296-62-077)	----	----	----	----	----
Asphalt (Petroleum fumes)	8052-42-4	5 mg/m3	10 mg/m3	----	----
Atrazine	1912-24-9	5 mg/m3	10 mg/m3	----	----
Azinphos methyl (Guthion)	86-50-0	0.2 mg/m3	0.6 mg/m3	----	X
Barium, soluble      compounds (as Ba)	7440-39-3	0.5 mg/m3	1.5 mg/m3	----	----
Barium sulfate	7727-43-7	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Benomyl	17804-35-2	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Benzene      (see WAC      296-62-07523)	71-43-2	1 ppm	5 ppm	----	----
Benzidine      (see WAC 296-62-073)	92-87-5	----	----	----	----
p-Benzoquinone      (Quinone)	106-51-4	0.1 ppm	0.3 ppm	----	----
Benzo(a) pyrene      (Coal tar pitch volatiles)	65996-93-2	0.2 mg/m3	0.6 mg/m3	----	----
Benzoyl peroxide	94-36-0	5 mg/m3	10 mg/m3	----	----
Benzyl chloride	100-44-7	1ppm	3 ppm	----	----
Beryllium and beryllium      compounds (as Be)	7440-41-7	0.002 mg/m3	0.005 mg/m3 (30 min.)	0.025 mg/m3	----
Biphenyl (Diphenyl)	92-52-4	0.2 ppm	0.6 ppm	----	----
Bismuth telluride, undoped	1304-82-1	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Bismuth telluride, Se-doped	----	5 mg/m3	10 mg/m3	----	----
Borates, tetra, sodium salts	----	----	----	----	----
Anhydrous	1330-43-4	1 mg/m3	3 mg/m3	----	----
Decahydrate	1303-96-4	5 mg/m3	10 mg/m3	----	----
Pentahydrate	12179-04-3	1 mg/m3	3 mg/m3	----	----
Boron oxide	1303-86-2	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Boron tribromide	10294-33-4	----	----	1.0 ppm	----
Boron trifluoride	6737-07-2	----	----	1.0 ppm	----
Bromacil	314-40-9	1 ppm	3 ppm	----	----
Bromine	7726-95-6	0.1 ppm	0.3 ppm	----	----
Bromine pentafluoride	7789-30-2	0.1 ppm	0.3 ppm	----	----
Bromochloromethane      (Chlorobromethane)	74-97-5	200 ppm	250 ppm	----	----
Bromoform	15-25-2	0.5 ppm	1.5 ppm	----	X
Butadiene      (1,3-butadiene)	106-99-0	1 ppm	5 ppm	----	----
Butane	106-97-8	800 ppm	1,000 ppm	----	----
Butanethiol      (see Butyl mercaptan)	109-79-5	0.5 ppm	1.5 ppm	----	----
2-Butanone      (Methyl ethyl ketone)	78-93-3	200 ppm	300 ppm	----	----
2-Butoxy ethanol      (Butyl cellosolve)	111-76-2	25 ppm	38 ppm	----	X
n-Butyl acetate	123-86-4	150 ppm	200 ppm	----	----
sec-Butyl acetate	105-46-4	200 ppm	250 ppm	----	----
tert-Butyl acetate	540-88-5	200 ppm	250 ppm	----	----
Butyl acrylate	141-32-2	10 ppm	20 ppm	----	----
n-Butyl alcohol	71-36-3	----	----	50 ppm	X
sec-Butyl alcohol	78-92-2	100 ppm	150 ppm	-- --	----
tert-Butyl alcohol	75-65-0	100 ppm	150 ppm	----	----
Butylamine	109-73-9	----	----	5 ppm	X
tert-Butyl chromate      (Chromic acid)	1189-85-1	----	----	0.1 mg/m3	X
n-Butyl glycidyl ether (BGE)	2426-08-6	25 ppm	38 ppm	----	----
n-Butyl lactate	138-22-7	5 ppm	10 ppm	---	----
Butyl mercaptan	109-79-5	0.5 ppm	1.5 ppm	----	----
o-sec-Butylphenol	89-72-5	5 ppm	10 ppm	----	X
p-tert-Butyl-toluene	98-51-1	10 ppm	20 ppm	----	----
Cadmium oxide fume (as Cd)      (see WAC 296-62-074)	1306-19-0	0.005 mg/m3	0.015 mg/m3	-- --	----
Cadmium dust and salts (as Cd)      (see WAC 296-62-074)	7440-43-9	---	----	----	----
Total particulate	----	0.01 mg/m3	0.03 mg/m3	----	----
Respirable fraction	----	0.002 mg/m3	0.006 mg/m3	----	----
Calcium arsenate      (see WAC 296-62-07347)	----	0.01 mg/m3	0.03 mg/m3	----	----
Calcium carbonate	1317-65-3	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Calcium cyanamide	156-62-7	0.5 mg/m3	1.5 mg/m3	----	----
Calcium hydroxide	1305-62-0	5 mg/m3	10 mg/m3	----	----
Calcium oxide	1305-78-8	2 mg/m3	4 mg/m3	----	----
Calcium silicate	1344-95-2	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Calcium sulfate	7778-18-9	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Camphor (synthetic)	76-22-2	2 mg/m3	4 mg/m3	----	----
Caprolactam	105-60-2	----	----	----	----
Dust	----	1 mg/m3	3 mg/m3	----	----
Vapor	----	5 ppm	10 ppm	----	----
Captafol      (Difolatan)	2425-06-1	0.1 mg/m3	0.3 mg/m3	----	X
Captan	133-06-2	5 mg/m3	10 mg/m3	----	----
Carbaryl (Sevin)	63-25-2	5 mg/m3	10 mg/m3	----	----
Carbofuran (Furadon)	1563-66-2	0.1 mg/m3	0.3 mg/m3	----	----
Carbon black	1333-86-4	3.5 mg/m3	7 mg/m3	----	----
Carbon dioxide	124-38-9	5,000 ppm	30,000 ppm	----	----
Carbon disulfide	75-15-0	4 ppm	12 ppm	----	X
Carbon monoxide	630-08-0	35 ppm	200 ppm (5 min.)	1,500 ppm	----
Carbon tetrabromide	558-13-4	0.1 ppm	0.3 ppm	----	----
Carbon tetrachloride      (Tetrachloromethane)	56-23-5	2 ppm	4 ppm	----	X
Carbonyl chloride      (Phosgene)	7803-51-2	0.3 ppm	1 ppm	----	----
Carbonyl fluoride	353-50-4	2 ppm	5 ppm	----	----
Catechol (Pyrocatechol)	120-80-9	5 ppm	10 ppm	----	X
Cellulose (paper fiber)	9004-34-6	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Cesium hydroxide	21351-79-1	2 mg/m3	4 mg/m3	----	----
Chlordane	57-74-9	0.5 mg/m3	1.5 mg/m3	----	X
Chlorinated camphene      (Toxaphen)	8001-35-2	0.5 mg/m3	1 mg/m3	----	X
Chlorinated diphenyl oxide	55720-99-5	0.5 mg/m3	1.5 mg/m3	----	----
Chlorine	7782-50-5	0.5 ppm	1 ppm	1 ppm	----
Chlorine dioxide	10049-04-4	0.1 ppm	0.3 ppm	----	----
Chlorine trifluoride	7790-91-2	----	----	0.1 ppm	----
Chloroacetaldehyde	107-20-0	----	----	1 ppm	----
a-Chloroacetophenone      (Phenacyl chloride)	532-21-4	0.05 ppm	0.15 ppm	----	----
Chloroacetyl chloride	79-04-9	0.05 ppm	0.15 ppm	----	----
Chlorobenzene      (Monochlorobenzene)	108-90-7	75 ppm	113 ppm	----	----
o-Chlorobenzylidene      malononitrile (OCBM)	2698-41-1	----	----	0.05 ppm	X
Chlorobromomethane	74-97-5	200 ppm	250 ppm	----	----
2-Chloro-1, 3-butadiene      (beta-Chloroprene)	126-99-8	10 ppm	20 ppm	----	X
Chlorodifluoromethane	75-45-6	1,000 ppm	1,250 ppm	----	----
Chlorodiphenyl      (42% Chlorine) (PCB)      (Polychlorobiphenyls)	53469-21-9	1 mg/m3	3 mg/m3	----	X
Chlorodiphenyl      (54% Chlorine)      (Polychlorobiphenyls      (PCB))	11097-69-1	0.5 mg/m3	1.5 mg/m3	----	X
1-Chloro-2, 3-epoxypropane      (Epichlorhydrin)	106-89-8	2 ppm	4 ppm	----	X
2-Chloroethanol      (Ethylene chlorohydrin)	107-07-3	----	----	1 ppm	X
Chloroethylene      (vinyl chloride)	75-01-4	1 ppm	5 ppm	----	----
Chloroform (Trichloromethane)	67-66-3	2 ppm	4 ppm	----	----
1-Chloro-1-nitropropane	600-25-9	2 ppm	4 ppm	----	----
bis-Chloromethyl ether      (see WAC 296-62-073)	542-88-1	----	----	----	----
Chloromethyl methyl ether      (Methyl chloromethyl      ether) (see WAC      296-62-073)	107-30-2	----	----	----	----
Chloropentafluoroethane	76-15-3	1,000 ppm	1,250 ppm	----	----
Chloropicrin (Nitrotrichloromethan)	76-06-2	0.1 ppm	0.3 ppm	----	----
beta-Chloroprene (2-Chloro-1,      3-butadiene)	126-99-8	10 ppm	20 ppm	----	X
o-Chlorostyrene	2039-87-4	50 ppm	75 ppm	----	----
o-Chlorotoluene	95-49-8	50 ppm	75 ppm	----	----
2-Chloro-6-trichloromethyl      pyridine (Nitrapyrin)	1929-82-4	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5.0 mg/m3	10.0 mg/m3	----	----
Chlorpyrifos	2921-88-2	0.2 mg/m3	0.6 mg/m3	----	X
Chromic acid and chromates      (as CrO3)	Varies with compound	----	----	0.1 mg/m3	----
Chromium, sol, chromic      chromous salts (as Cr)	7440-47-3	0.5 mg/m3	1.5 mg/m3	----	-- --
Chromium (VI) compounds      (as Cr)	----	0.05 mg/m3	0.15 mg/m3	----	----
Chromium metal      and insoluble salts	7440-47-3	0.5 mg/m3	1.5 mg/m3	----	----
Chromyl chloride	14977-61-8	0.025 ppm	0.075 ppm	----	----
Chrysene (Coal tar      pitch volatiles)	65996-93-2	0.2 mg/m3	0.6 mg/m3	----	----
Clopidol	2971-90-6	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Coal dust (less than 5% SiO2)	----	----	----	----	----
Respirable fraction	----	2 mg/m3	4 mg/m3	----	----
Coal dust (greater than or      equal to 5% SiO2)	----	----	----	----	----
Respirable fraction	----	0.1 mg/m3	0.3 mg/m3	----	----
Coal tar pitch volatiles      (benzene soluble fraction      anthracene, BaP,      phenanthrene, acridine,      chrysene, pyrene)	----	----	----	----	----
(Benzo(a) pyrene),           (Particulate polycyclic           aromatic hydrocarbons)	65996-93-2	0.2 mg/m3	0.6 mg/m3	----	----
Cobalt, metal fume & dust      (as Co)	7440-48-4	0.05 mg/m3	0.15 mg/m3	----	----
Cobalt carbonyl (as Co)	10210-68-1	0.1 mg/m3	0.3 mg/m3	----	----
Cobalt hydrocarbonyl (as Co)	16842-03-8	0.1 mg/m3	0.3 mg/m3	----	----
Coke oven emissions      (see WAC 296-62-200)	----	0.15 mg/m3	0.45 mg/m3	----	----
Copper (as Cu)	7440-50-8	----	----	----	----
Fume	----	0.1 mg/m3	0.3 mg/m3	----	----
Dusts and mists	----	1 mg/m3	3 mg/m3	----	----
Cotton dust (raw) (see      WAC 296-62-14533)	----	1 mg/m3	3 mg/m3	----	----
Corundum (Aluminum oxide)	7429-90-5	10 mg/m3	20 mg/m3	----	----
Crag herbicide (Sesone, Sodium-2,      4-dichloro-phenoxyethyl      sulfate)	136-78-7	10 mg/m3	20 mg/m3	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Cresol (all isomers)	1319-77-3	5 ppm	10 ppm	----	X
Crotonaldehyde	123-73-9; 4170-30-3	2 ppm	4 ppm	----	----
Crufomate	299-86-5	5 mg/m3	10 mg/m3	----	----
Cumene	98-82-8	50 ppm	75 ppm	----	X
Cyanamide	420-04-2	2 mg/m3	4 mg/m3	----	----
Cyanide (as CN)	Varies with compound	5 mg/m3	10 mg/m3	----	X
Cyanogen	460-19-5	10 ppm	20 ppm	----	----
Cyanogen chloride	506-77-4	----	----	0.3 ppm	----
Cyclohexane	110-82-7	300 ppm	375 ppm	----	----
Cyclohexanol	108-93-0	50 ppm	75 ppm	----	X
Cyclohexanone	108-94-1	25 ppm	38 ppm	----	X
Cyclohexene	110-83-8	300 ppm	375 ppm	----	----
Cyclohexylamine	108-91-8	10 ppm	20 ppm	----	----
Cyclonite (RDX)	121-82-4	1.5 mg/m3	3.0 mg/m3	----	X
Cyclopentadiene	542-92-7	75 ppm	113 ppm	----	----
Cyclopentane	287-92-3	600 ppm	750 ppm	----	----
Cyhexatin (Tricyclohexyltin      hydroxide)	13121-70-5	5 mg/m3	10 mg/m3	----	----
2,4-D (Dichlorophenoxy-      acetic acid)	94-75-7	10 mg/m3	20 mg/m3	----	----
DDT (Dichlorodiphenyltri-      chloroethane)	50-29-3	1 mg/m3	3 mg/m3	----	X
DDVP, Dichlorvos	62-73-7	0.1 ppm	0.3 ppm	----	X
Decaborane	17702-41-9	0.05 ppm	0.15 ppm	----	X
Demeton	8065-48-3	0.01 ppm	0.03 ppm	----	X
Diacetone alcohol      (4-hydroxy-4-methyl-      2-pentanone)	123-42-2	50 ppm	75 ppm	----	----
1, 2-Diaminoethane      (Ethylenediamine)	107-15-3	10 ppm	20 ppm	----	----
Diazinon	333-41-5	0.1 mg/m3	0.3 mg/m3	----	X
Diazomethane	334-88-3	0.2 ppm	0.6 ppm	----	----
Diborane	19287-45-7	0.1 ppm	0.3 ppm	----	----
Dibrom (see Naled)	300-76-5	3 mg/m3	6 mg/m3	----	X
1, 2-Dibromo-3-chloropropane      (DBCP)      (see WAC      296-62-07342)	96-12-8	0.001 ppm	----	0.005 ppm	----
2-N-Dibutylamino ethanol	102-81-8	2 ppm	4 ppm	----	X
Dibutyl phosphate	107-66-4	1 ppm	2 ppm	----	----
Dibutyl phthalate	84-74-2	5 mg/m3	10 mg/m3	----	----
Dichloroacetylene	7572-29-4	----	-----	0.1 ppm	----
o-Dichlorobenzene	95-50-1	----	----	50 ppm	----
p-Dichlorobenzene	106-46-7	75 ppm	110 ppm	----	----
3, 3'-Dichlorobenzidine      (see WAC 296-62-073)	91-94-1	----	----	----	----
Dichlorodiphenyltri-      chloroethane (DDT)	50-29-3	1 mg/m3	3 mg/m3	----	X
Dichlorodifluoromethane	75-71-8	1,000 ppm	1,250 ppm	----	----
1, 3-Dichloro-5, 5-dimethyl      hydantoin	118-52-5	0.2 mg/m3	0.4 mg/m3	----	----
1, 1-Dichloroethane	75-34-3	100 ppm	150 ppm	----	----
1, 2-Dichloroethane      (Ethylene dichloride)	107-06-2	1 ppm	2 ppm	----	----
1, 2-Dichloroethylene (Acetylene      dichloride)	540-59-0	200 ppm	250 ppm	----	----
1, 1-Dichloroethylene      (Vinylidene chloride)	75-35-4	1 ppm	3 ppm	----	----
Dichloroethyl ether	111-44-4	5 ppm	10 ppm	----	X
Dichlorofluoromethane	75-43-4	10 ppm	20 ppm	----	----
Dichloromethane      (Methylene chloride)	75-09-2	25 ppm	125 ppm	----	----
1, 1-Dichloro-1-nitroethane	594-72-9	2 ppm	10 ppm	----	----
1, 2-Dichloropropane      (Propylene dichloride)	78-87-5	75 ppm	110 ppm	----	----
Dichloropropene	542-75-6	1 ppm	3 ppm	----	X
2, 2-Dichloropropionic acid	75-99-0	1 ppm	3 ppm	----	----
Dichlorotetrafluoroethane	76-14-2	1,000 ppm	1,250 ppm	----	----
Dichlorvos (DDVP)	62-73-7	0.1 ppm	0.3 ppm	----	X
Dicrotophos	141-66-2	0.25 mg/m3	0.75 mg/m3	----	X
Dicyclopentadiene	77-73-6	5 ppm	10 ppm	----	----
Dicyclopentadienyl iron	102-54-5	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Dieldrin	60-57-1	0.25 mg/m3	0.75 mg/m3	----	X
Diethanolamine	111-42-2	3 ppm	6 ppm	----	----
Diethylamine	109-89-7	10 ppm	25 ppm	----	----
2-Diethylaminoethanol	100-37-8	10 ppm	20 ppm	----	X
Diethylene triamine	111-40-0	1 ppm	3 ppm	----	X
Diethyl ether (Ethyl ether)	60-29-7	400 ppm	500 ppm	----	----
Diethyl ketone	96-22-0	200 ppm	250 ppm	----	----
Diethyl phthalate	84-66-2	5 mg/m3	10 mg/m3	----	----
Difluorodibromomethane	75-61-6	100 ppm	150 ppm	----	----
Diglycidyl ether (DGE)	2238-07-5	0.1 ppm	0.3 ppm	----	----
Dihydroxybenzene      (Hydroquinone)	123-31-9	2 mg/m3	4 mg/m3	-- --	----
Diisobutyl ketone (2, 6-      Dimethylheptanone)	108-83-8	25 ppm	38 ppm	----	----
Diisopropylamine	108-18-9	5 ppm	10 ppm	----	X
Dimethoxymethane (Methylal)	109-87-5	1,000 ppm	1,250 ppm	----	----
Dimethyl acetamide	127-19-5	10 ppm	20 ppm	----	X
Dimethylamine	124-40-3	10 ppm	20 ppm	----	----
4-Dimethylaminoazo benzene      (see WAC 296-62-073)	60-11-7	----	----	----	----
Dimethylaminobenzene      (Xylidene)	1300-73-8	2 ppm	4 ppm	----	X
Dimethylaniline      (N, N-Dimethylaniline)	121-69-7	5 ppm	10 ppm	----	X
Dimethylbenzene (Xylene)	1300-73-8	2 ppm	4 ppm	----	X
Dimethyl-1, 2-dibromo-2,      2-dichloroethyl phosphate      (Naled)	300-76-5	3 mg/m3	6 mg/m3	----	X
Dimethylformamide	68-12-2	10 ppm	20 ppm	----	X
2, 6-Dimethylheptanone      (Diisobutyl ketone)	108-83-8	25 ppm	38 ppm	----	----
1, 1-Dimethylhydrazine	57-14-7	0.5 ppm	1.5 ppm	----	X
Dimethyl phthalate	131-11-3	5 mg/m3	10 mg/m3	----	----
Dimethyl sulfate	77-78-1	0.1 ppm	0.3 ppm	----	X
Dinitolmide      (3, 5-Dinitro-o-toluamide)	148-01-6	5 mg/m3	10 mg/m3	----	----
Dinitrobenzene (all isomers -      alpha, meta and para)	528-29-0; 99-65-0; 100-25-4	0.15 ppm	0.45 ppm	----	X
Dinitro-o-cresol	534-52-1	0.2 mg/m3	0.6 mg/m3	----	X
Dinitrotoluene	25321-14-6	1.5 mg/m3	3 mg/m3	----	X
Dioxane (Diethylene dioxide)	123-91-1	25 ppm	38 ppm	----	X
Dioxathion	78-34-2	0.2 mg/m3	0.6 mg/m3	----	X
Diphenyl (Biphenyl)	92-52-4	0.2 ppm	0.6 ppm	----	----
Diphenylamine	122-39-4	10 mg/m3	20 mg/m3	----	----
Diphenylmethane diisocyanate      (Methylene bisphenyl           isocyanate (MDI))	101-68-8	----	----	0.02 ppm	----
Dipropylene glycol methyl ether	34590-94-8	100 ppm	150 ppm	----	X
Dipropyl ketone	123-19-3	50 ppm	75 ppm	----	----
Diquat	85-00-7	0.5 mg/m3	1.5 mg/m3	----	----
Di-sec, Octyl phthalate      (Di-2-ethylhexylphthalate)	117-81-7	5 mg/m3	10 mg/m3	----	----
Disulfram	97-77-8	2 mg/m3	4 mg/m3	----	----
Disulfoton	298-04-4	0.1 mg/m3	0.3 mg/m3	----	X
2, 6-Di-tert-butyl-p-cresol	128-37-0	10 mg/m3	20 mg/m3	----	----
Diuron	330-54-1	10 mg/m3	20 mg/m3	----	----
Divinyl benzene	1321-74-0	10 ppm	20 ppm	----	----
Emery	12415-34-8	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Endosulfan (Thiodan)	115-29-7	0.1 mg/m3	0.3 mg/m3	----	X
Endrin	72-20-8	0.1 mg/m3	0.3 mg/m3	----	X
Epichlorhydrin (1-Chloro-2,      3-epoxypropane)	106-89-8	2 ppm	4 ppm	----	X
EPN	2104-64-5	0.5 mg/m3	1.5 mg/m3	----	X
1, 2-Epoxypropane      (Propylene oxide)	75-56-9	20 ppm	30 ppm	----	----
2, 3-Epoxy-1-propanol      (Glycidol)	556-52-5	25 ppm	38 ppm	----	----
Ethane	----	Simple asphyxiant	----	----	----
Ethanethiol      (Ethyl mercaptan)	75-08-1	0.5 ppm	1.5 ppm	----	----
Ethanolamine (2-Aminoethanol)	141-43-5	3 ppm	6 ppm	----	----
Ethion	563-12-2	0.4 mg/m3	1.2 mg/m3	----	X
2-Ethoxyethanol (Glycol      monoethyl ether)	110-80-5	5 ppm	10 ppm	----	X
2-Ethoxyethyl acetate      (Cellosolve acetate)	111-15-9	5 ppm	10 ppm	----	X
Ethyl acetate	141-78-6	400 ppm	500 ppm	----	----
Ethyl acrylate	140-88-5	5 ppm	25 ppm	----	X
Ethyl alcohol (ethanol)	64-17-5	1,000 ppm	1,250 ppm	----	----
Ethylamine	75-04-07	10 ppm	20 ppm	----	----
Ethyl amyl ketone      (5-Methyl-3-hepatone)	541-85-5	25 ppm	37.5 ppm	----	----
Ethyl benzene	100-41-4	100 ppm	125 ppm	----	----
Ethyl bromide	74-96-4	200 ppm	250 ppm	----	----
Ethyl butyl ketone      (3-Heptanone)	106-35-4	50 ppm	75 ppm	----	----
Ethyl chloride	75-00-3	1,000 ppm	1,250 ppm	----	----
Ethylene	74-85-1	Simple asphyxiant	----	----	----
Ethylene chlorohydrin      (2-Chloroethanol)	107-07-3	----	----	1.0 ppm	X
Ethylenediamine (1,2-      Diaminoethane)	107-15-3	10 ppm	20 ppm	----	X
Ethylene dibromide	106-93-4	0.1 ppm	0.5 ppm	----	----
Ethylene dichloride      (1,2-Dichloroethane)	107-06-2	1 ppm	2 ppm	----	----
Ethylene glycol	107-21-1	----	----	50 ppm	----
Ethylene glycol dinitrate	628-96-6	----	0.1 mg/m3	----	X
Ethylene glycol monomethyl ether      acetate (Methyl cellosolve           acetate)	----	5 ppm	10 ppm	----	X
Ethyleneimine      (see WAC 296-62-073)	151-56-4	----	----	----	X
Ethylene oxide      (see WAC      296-62-07359)	75-21-8	1 ppm	3 ppm	----	----
Ethyl ether (Diethyl ether)	60-29-7	400 ppm	500 ppm	----	----
Ethyl formate	109-94-4	100 ppm	125 ppm	----	----
Ethylidine chloride      (1, 1-Dichloroethane)	107-06-2	1 ppm	2 ppm	----	----
Ethylidene norbornene	16219-75-3	----	----	5.0 ppm	----
Ethyl mercaptan (Ethanethiol)	75-08-1	0.5 ppm	1.5 ppm	----	----
n-Ethylmorpholine	100-74-3	5 ppm	10 ppm	----	X
Ethyl sec-amyl ketone      (5-methyl-3-heptanone)	541-85-5	25 ppm	37.50 ppm	----	----
Ethyl silicate	78-10-4	10 ppm	20 ppm	----	----
Fenamiphos	22224-92-6	0.1 mg/m3	0.3 mg/m3	----	X
Fensulfothion (Dasanit)	115-90-2	0.1 mg/m3	0.3 mg/m3	----	----
Fenthion	55-38-9	0.2 mg/m3	0.6 mg/m3	----	X
Ferbam	----	----	----	----	----
Total particulate	14484-64-1	10 mg/m3	20 mg/m3	----	----
Ferrovanadium dust	12604-58-9	1 mg/m3	3 mg/m3	----	----
Fluorides (as F)	Varies with compound	2.5 mg/m3	5 mg/m3	----	----
Fluorine	7782-41-4	0.1 ppm	0.3 ppm	----	----
Fluorotrichloromethane      (see Trichlorofluoro methane)	75-69-4	----	----	1,000 ppm	----
Fonofos	944-22-9	0.1 mg/m3	0.3 mg/m3	----	X
Formaldehyde      (see WAC 296-62-07540)	50-00-0	0.75 ppm	2.0 ppm	----	----
Formamide	75-12-7	20 ppm	30 ppm	----	----
Formic acid	64-18-6	5 ppm	10 ppm	----	----
Furfural	98-01-1	2 ppm	4 ppm	----	X
Furfuryl alcohol	98-00-0	10 ppm	15 ppm	----	X
Gasoline	8006-61-9	300 ppm	500 ppm	----	----
Germanium tetrahydride	7782-65-2	0.2 ppm	0.6 ppm	----	----
Glass, fibrous or dust	----	10 mg/m3	20 mg/m3	----	----
Gluteraldehyde	111-30-8	----	----	0.2 ppm	----
Glycerin mist	56-81-5	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5.0 mg/m3	10.0 mg/m3	----	----
Glycidol      (2, 3-Epoxy-1-propanol)	556-52-5	25 ppm	37.5 ppm	----	----
Glycol monoethyl ether      (2-Ethoxyethanol)	110-80-5	5 ppm	10 ppm	----	X
Grain dust (oat, wheat, barley)	----	10 mg/m3	20 mg/m3	----	----
Graphite, natural	7782-42-5	----	----	----	----
Respirable particulate	----	2.5 mg/m3	5 mg/m3	----	----
Graphite, synthetic	----	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Guthion      (Azinphosmethyl)	86-50-0	0.2 mg/m3	0.6 mg/m3	----	X
Gypsum	13397-24-5	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Hafnium	7440-58-6	0.5 mg/m3	1.5 mg/m3	----	----
Helium	----	Simple asphyxiant	----	----	----
Heptachlor	76-44-8	0.5 mg/m3	1.5 mg/m3	----	X
Heptane (n-heptane)	142-82-5	400 ppm	500 ppm	----	----
2-Heptanone      (Methyl n-amyl ketone)	110-43-0	50 ppm	75 ppm	----	----
3-Heptanone      (Ethyl butyl ketone)	106-35-4	50 ppm	75 ppm	----	----
Hexachlorobutadiene	87-68-3	0.02 ppm	0.06 ppm	----	X
Hexachlorocyclopentadiene	77-47-4	0.01 ppm	0.03 ppm	----	----
Hexachloroethane	67-72-1	1 ppm	3 ppm	----	X
Hexachloronaphthalene	1335-87-1	0.2 mg/m3	0.6 mg/m3	----	X
Hexafluoroacetone	684-16-2	0.1 ppm	0.3 ppm	----	X
Hexane	----	----	----	----	----
n-hexane	110-54-3	50 ppm	75 ppm	----	----
other isomers	Varies with compound	500 ppm	1,000 ppm	----	----
2-Hexanone      (Methyl-n-butyl ketone)	591-78-6	5 ppm	10 ppm	----	----
Hexone      (Methyl isobutyl ketone)	108-10-1	50 ppm	75 ppm	----	----
sec-Hexyl acetate	108-84-9	50 ppm	75 ppm	----	----
Hexylene glycol	107-41-5	----	----	25 ppm	----
Hydrazine	302-01-2	0.1 ppm	0.3 ppm	----	X
Hydrogen	----	Simple asphyxiant	----	----	----
Hydrogenated terphenyls	61788-32-7	0.5 ppm	1.5 ppm	----	----
Hydrogen bromide	10035-10-6	----	----	3.0 ppm	----
Hydrogen chloride	7647-01-0	----	----	5.0 ppm	----
Hydrogen cyanide	74-90-8	----	4.7 ppm	----	X
Hydrogen fluoride	7664-39-3	----	----	3 ppm	----
Hydrogen peroxide	7722-84-1	1 ppm	3 ppm	----	----
Hydrogen selenide (as Se)	7783-07-5	0.05 ppm	0.15 ppm	----	----
Hydrogen sulfide	7783-06-4	10 ppm	15 ppm	----	----
Hydroquinone      (Dihydroxybenzene)	123-31-9	2 mg/m3	4 mg/m3	----	----
4-Hydroxy-4-methyl-2-pentanone      (Diacetone alcohol)	123-42-2	50 ppm	75 ppm	----	----
2-Hydroxypropyl acrylate	99-61-1	0.5 ppm	1.5 ppm	----	X
Indene	95-13-6	10 ppm	20 ppm	----	----
Indium and compounds (as In)	7440-74-6	0.1 mg/m3	0.3 mg/m3	----	----
Iodine	7553-56-2	----	----	0.1 ppm	----
Iodoform	75-47-8	0.6 ppm	1.8 ppm	----	----
Iron oxide dust and fume (as Fe)	1309-37-1	----	----	----	----
Total particulate	----	5 mg/m3	10 mg/m3	----	----
Iron pentacarbonyl (as Fe)	13463-40-6	0.1 ppm	0.2 ppm	----	----
Iron salts, soluble (as Fe)	Varies with compound	1 mg/m3	3 mg/m3	----	----
Isoamyl acetate	123-92-2	100 ppm	150 ppm	----	----
Isoamyl alcohol      (primary and secondary)	123-51-3	100 ppm	125 ppm	----	----
Isobutyl acetate	110-19-0	150 ppm	188 ppm	----	----
Isobutyl alcohol	78-83-1	50 ppm	75 ppm	----	----
Isooctyl alcohol	26952-21-6	50 ppm	75 ppm	----	X
Isophorone	78-59-1	4 ppm	----	5 ppm	----
Isophorone diisocyanate	4098-71-9	0.005 ppm	0.02 ppm	----	X
Isopropoxyethanol	109-59-1	25 ppm	38 ppm	----	----
Isopropyl acetate	108-21-4	250 ppm	310 ppm	----	----
Isopropyl alcohol	67-63-0	400 ppm	500 ppm	----	----
Isopropylamine	75-31-0	5 ppm	10 ppm	----	----
N-Isopropylaniline	768-52-5	2 ppm	4 ppm	----	X
Isopropyl ether	108-20-3	250 ppm	313 ppm	----	----
Isopropyl glycidyl ether (IGE)	4016-14-2	50 ppm	75 ppm	-----	----
Kaolin	----	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Ketene	463-51-4	0.5 mg/m3	1.5 mg/m3	----	----
Lead inorganic (as Pb)      (see WAC 296-62-07521      and 296-155-176)	7439-92-1	0.05 mg/m3	0.15 mg/m3	----	----
Lead arsenate      (see WAC 296-62-07347)	3687-31-8	0.05 mg/m3	0.15 mg/m3	----	----
Lead chromate	7758-97-6	0.05 mg/m3	0.15 mg/m3	----	----
Limestone	1317-65-3	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Lindane	58-89-9	0.5 mg/m3	1.5 mg/m3	----	X
Lithium hydride	7580-67-8	0.025 mg/m3	0.075 mg/m3	----	----
L.P.G.      (liquified petroleum gas)	68476-85-7	1,000 ppm	1,250 ppm	----	----
Magnesite	546-93-0	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Magnesium oxide fume	1309-48-4	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Malathion	121-75-5	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	X
Maleic anhydride	108-31-6	0.25 ppm	0.75 ppm	----	----
Manganese and compound (as Mn)	7439-96-5	----	----	5 mg/m3	----
Manganese tetroxide and fume      (as Mn)	7439-96-5	1 mg/m3	3 mg/m3	----	----
Manganese cyclopentadienyl      tricarbonyl (as Mn)	12079-65-1	0.1 mg/m3	0.3 mg/m3	----	X
Manganese tetroxide (as Mn)	1317-35-7	1 mg/m3	3 mg/m3	----	----
Marble	1317-65-3	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Mercury (as Hg)	7439-97-6	----	----	----	----
Aryl and inorganic	----	----	----	0.1 mg/m3	X
Organo-alkyl compounds	----	0.01 mg/m3	0.03 mg/m3	----	X
Vapor	----	0.05 mg/m3	0.15 mg/m3	----	X
Mesityl oxide	141-79-7	15 ppm	25 ppm	----	----
Methacrylic acid	79-41-4	20 ppm	30 ppm	----	X
Methane	----	Simple asphyxiant	----	----	----
Methanethiol      (Methyl mercaptan)	74-93-1	0.5 ppm	1.5 ppm	----	----
Methomyl (lannate)	16752-77-5	2.5 mg/m3	5 mg/m3	----	----
Methoxychlor	72-43-5	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
2-Methoxyethanol      (Methyl cellosolve)	109-86-4	5 ppm	10 ppm	----	X
4-Methoxyphenol	150-76-5	5 mg/m3	10 mg/m3	----	----
Methyl acetate	79-20-9	200 ppm	250 ppm	----	----
Methyl acetylene (propyne)	74-99-7	1,000 ppm	1,250 ppm	----	----
Methyl acetylene-propadiene      mixture (MAPP)	----	1,000 ppm	1,250 ppm	----	----
Methyl acrylate	96-33-3	10 ppm	20 ppm	----	X
Methylacrylonitrile	126-98-7	1 ppm	3 ppm	----	X
Methylal (Dimethoxy-methane)	109-87-5	1,000 ppm	1,250 ppm	----	----
Methyl alcohol (methanol)	67-56-1	200 ppm	250 ppm	----	X
Methylamine	74-89-5	10 ppm	20 ppm	----	----
Methyl amyl alcohol      (Methyl isobutyl carbinol)	108-11-2	25 ppm	40 ppm	----	X
Methyl n-amyl ketone      (2-Heptanone)	110-43-0	50 ppm	75 ppm	----	----
N-Methyl aniline      (Monomethyl aniline)	100-61-8	0.5 ppm	1.5 ppm	----	X
Methyl bromide	74-83-9	5 ppm	10 ppm	----	X
Methyl-n-butyl ketone      (2-Hexanone)	591-78-6	5 ppm	10 ppm	----	----
Methyl cellosolve      (2-Methoxyethanol)	109-86-4	5 ppm	10 ppm	----	X
Methyl cellosolve acetate      (2-Methoxyethyl acetate)	110-49-6	5 ppm	10 ppm	----	X
Methyl chloride	74-87-3	50 ppm	100 ppm	----	----
Methyl chloroform      (1, 1, 1-trichlorethane)	71-55-6	350 ppm	450 ppm	----	----
Methyl chloromethyl ether      (chloromethyl methyl      ether)      (see WAC 296-62-073)	107-30-2	----	----	----	----
Methyl 2-cyanoacrylate	137-05-3	2 ppm	4 ppm	----	----
Methylcyclohexane	108-87-2	400 ppm	500 ppm	----	----
Methylcyclohexanol	25639-42-3	50 ppm	75 ppm	----	----
Methylcyclohexanone	583-60-8	50 ppm	75 ppm	----	X
Methylcyclopentadienyl      manganese tricarbonyl (as           Mn)	12108-13-3	0.2 mg/m3	0.6 mg/m3	----	X
Methyl demeton	8022-00-2	0.5 mg/m3	1.5 mg/m3	----	X
Methylene bisphenyl isocyanate      (MDI)      (Diphenylmethane diisocyanate)	101-68-8	----	----	0.02 ppm	----
4, 4'-Methylene bis      (2-chloro-aniline) (MBOCA)      (see WAC 296-62-073)	101-14-4	0.02 ppm	0.06 ppm	----	X
Methylene bis      (4-cyclohexylisocyanate)	5124-30-1	----	----	0.01 ppm	----
Methylene chloride      (Dichloromethane)      (see WAC 296-62-07470)	75-09-2	25 ppm	125 ppm	----	----
4, 4-Methylene dianiline	101-77-9	0.1 ppm	0.3 ppm	----	X
Methyl ethyl ketone (MEK)      (2-Butanone)	78-93-3	200 ppm	250 ppm	----	----
Methyl ethyl ketone peroxide      (MEKP)	1338-23-4	----	----	0.2 ppm	----
Methyl formate	107-31-3	100 ppm	150 ppm	----	----
5-Methyl-3-heptanone      (Ethyl amyl ketone)	541-85-5	25 ppm	38 ppm	----	----
Methyl hydrazine      (Monomethyl hydrazine)	60-34-4	----	----	0.2 ppm	X
Methyl iodide	74-88-4	2 ppm	4 ppm	----	X
Methyl isoamyl ketone	110-12-3	50 ppm	75 ppm	----	----
Methyl isobutyl carbinol      (Methyl amyl alcohol)	108-11-2	25 ppm	40 ppm	----	X
Methyl isobutyl ketone      (Hexone)	108-10-1	50 ppm	75 ppm	----	----
Methyl isocyanate	624-83-9	0.02 ppm	0.06 ppm	----	X
Methyl isopropyl ketone	563-80-4	200 ppm	250 ppm	----	----
Methyl mercaptan (Methanethiol)	74-93-1	0.5 ppm	1.5 ppm	----	----
Methyl methacrylate	80-62-6	100 ppm	150 ppm	----	----
Methyl parathion	298-00-0	0.2 mg/m3	0.6 mg/m3	----	X
Methyl propyl ketone      (2-Pentanone)	107-87-9	200 ppm	250 ppm	----	----
Methyl silicate	684-84-5	1 ppm	3 ppm	----	----
alpha-Methyl styrene	98-83-9	50 ppm	100 ppm	----	----
Mevinphos (Phosdrin)	7786-34-7	0.01 ppm	0.03 ppm	----	X
Metribuzin	21087-64-9	5 mg/m3	10 mg/m3	----	----
Mica (Silicates)	12001-26-2	3 mg/m3	6 mg/m3	----	----
Molybdenum (as Mo)	7439-98-7	----	----	----	----
Soluble compounds	----	5 mg/m3	10 mg/m3	----	----
Insoluble compounds	----	----	----	----	----
(Total particulates)	----	10 mg/m3	20 mg/m3	----	----
Monocrotophos (Azodrin)	6923-22-4	0.25 mg/m3	0.75 mg/m3	----	----
Monomethyl aniline      (N-Methyl aniline)	100-61-8	0.5 ppm	1.5 ppm	----	X
Monomethyl hydrazine	----	----	----	0.2 ppm	----
Morpholine	110-91-8	20 ppm	30 ppm	----	X
Naled (Dibrom)	300-76-5	3 mg/m3	6 mg/m3	----	X
Naphtha	8030-30-6	100 ppm	150 ppm	----	X
Naphthalene	91-20-3	10 ppm	15 ppm	----	----
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 ppm	0.003 ppm	----	----
Nickel (as Ni)	7440-02-0	----	----	----	----
Metal and insoluble      compounds	----	1 mg/m3	3 mg/m3	----	----
Soluble compounds	----	0.1 mg/m3	0.3 mg/m3	----	----
Nicotine	54-11-5	0.5 mg/m3	1.5 mg/m3	----	X
Nitrapyrin      (2-Chloro-6      trichloromethyl pyridine)	1929-82-4	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Nitric acid	7697-37-2	2 ppm	4 ppm	----	----
Nitric oxide	10102-43-9	25 ppm	38 ppm	----	----
p-Nitroaniline	100-01-6	3 mg/m3	6 mg/m3	----	X
Nitrobenzene	98-95-3	1 ppm	3 ppm	----	X
4-Nitrobiphenyl      (see WAC 296-62-073)	92-93-3	----	----	----	----
p-Nitrochlorobenzene	100-00-5	0.5 mg/m3	1.5 mg/m3	----	X
4-Nitrodiphenyl      (see WAC 296-62-073)	----	----	----	----	----
Nitroethane	79-24-3	100 ppm	150 ppm	----	----
Nitrogen	7727-37-9	Simple asphyxiant	----	----	----
Nitrogen dioxide	10102-44-0	----	1 ppm	----	----
Nitrogen trifluoride	7783-54-2	10 ppm	20 ppm	----	----
Nitroglycerin	55-63-0	----	0.1 mg/m3	----	X
Nitromethane	75-52-5	100 ppm	150 ppm	----	----
1-Nitropropane	108-03-2	25 ppm	38 ppm	----	----
2-Nitropropane	79-46-9	10 ppm	20 ppm	----	----
N-Nitrosodimethylamine      (see WAC 296-62-073)	62-75-9	----	----	----	----
Nitrotoluene	----	----	----	----	----
o-isomer	88-72-2	2 ppm	4 ppm	----	X
m-isomer	98-08-2	2 ppm	4 ppm	----	X
p-isomer	99-99-0	2 ppm	4 ppm	----	X
Nitrotrichloromethane      (Chloropicrin)	76-06-2	0.1 ppm	0.3 ppm	----	----
Nitrous oxide      (Nitrogen oxide)	10024-97-2	50 ppm	75 ppm	----	----
Nonane	111-84-2	200 ppm	250 ppm	----	----
Octachloronaphthalene	2234-13-1	0.1 mg/m3	0.3 mg/m3	----	X
Octane	111-65-9	300 ppm	375 ppm	----	----
Oil mist mineral (particulate)	8012-95-1	5 mg/m3	10 mg/m3	----	----
Osmium tetroxide (as Os)	20816-12-0	0.0002 ppm	0.0006 ppm	----	----
Oxalic acid	144-62-7	1 mg/m3	2 mg/m3	----	----
Oxygen difluoride	7783-41-7	----	----	0.05 ppm	----
Ozone	10028-15-6	0.1 ppm	0.3 ppm	----	----
Paraffin wax fume	8002-74-2	2 mg/m3	4 mg/m3	----	----
Paraquat	----	----	----	----	----
Respirable fraction	4685-14-7	0.1 mg/m3	0.3 mg/m3	----	X
	1910-42-5
	2074-50-2
Parathion	56-38-2	0.1 mg/m3	0.3 mg/m3	----	X
Particulate polycyclic      aromatic hydrocarbons      (coal tar pitch volatiles)	65996-93-2	0.2 mg/m3	0.6 mg/m3	----	----
Particulates not otherwise      regulated	----	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Pentaborane	19624-22-7	0.005 ppm	0.015 ppm	----	----
Pentachloronaphthalene	1321-64-8	0.5 mg/m3	1.5 mg/m3	----	X
Pentachlorophenol	87-86-5	0.5 mg/m3	1.5 mg/m3	----	X
Pentaerythritol	115-77-5	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Pentane	109-66-0	600 ppm	750 ppm	----	----
2-Pentanone      (methyl propyl ketone)	107-87-9	200 ppm	250 ppm	----	----
Perchloroethylene      (tetrachloroethylene)	127-18-4	25 ppm	38 ppm	----	----
Perchloromethyl mercaptan	594-42-3	0.1 ppm	0.3 ppm	----	----
Perchloryl fluoride	7616-94-6	3 ppm	6 ppm	----	----
Perlite	----	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5.0 mg/m3	10.0 mg/m3	----	----
Petroleum distillates      (Naptha, rubber solvent)	----	100 ppm	150.0 ppm	----	----
Phenol	108-95-2	5 ppm	10 ppm	----	X
Phenothiazine	92-84-2	5 mg/m3	10 mg/m3	----	X
p-Phenylene diamine	106-50-3	0.1 mg/m3	0.3 mg/m3	----	X
Phenyl ether (vapor)	101-84-8	1 ppm	3 ppm	----	----
Phenyl ether-diphenyl      mixture (vapor)	----	1 ppm	3 ppm	----	----
Phenylethylene (Styrene)	100-42-5	50 ppm	100 ppm	----	----
Phenyl glycidyl ether (PGE)	122-60-1	1 ppm	3 ppm	----	----
Phenylhydrazine	100-63-0	5 ppm	10 ppm	----	X
Phenyl mercaptan	108-98-5	0.5 ppm	1.5 ppm	----	----
Phenylphosphine	638-21-1	----	----	0.05 ppm	----
Phorate	298-02-2	0.05 mg/m3	0.2 mg/m3	----	X
Phosdrin (Mevinphos)	7786-34-7	0.01 ppm	0.03 ppm	----	X
Phosgene (carbonyl chloride)	75-44-5	0.1 ppm	0.03 ppm	----	----
Phosphine	7803-51-2	0.30 ppm	1 ppm	----	----
Phosphoric acid	7664-38-2	1 mg/m3	3 mg/m3	----	----
Phosphorus (yellow)	7723-14-0	0.1 mg/m3	0.3 mg/m3	----	----
Phosphorous oxychloride	10025-87-3	0.1 ppm	0.3 ppm	----	----
Phosphorus pentachloride	10026-13-8	0.1 ppm	0.3 ppm	----	----
Phosphorus pentasulfide	1314-80-3	1 mg/m3	3 mg/m3	----	----
Phosphorus trichloride	12-2-19	0.2 ppm	0.5 ppm	----	----
Phthalic anhydride	85-44-9	1 ppm	3 ppm	----	----
m-Phthalodinitrile	626-17-5	5 mg/m3	10 mg/m3	----	----
Picloram	1918-02-1	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Picric acid (2, 4, 6-      Trinitrophenol)	88-89-1	0.1 mg/m3	0.3 mg/m3	----	X
Pindone      (2-Pivalyl-1, 3-indandione,      Pival)	83-26-1	0.1 mg/m3	0.3 mg/m3	----	----
Piperazine dihydrochloride	142-64-3	5 mg/m3	10 mg/m3	----	----
Pival (Pindone)	83-26-1	0.1 mg/m3	0.3 mg/m3	----	----
Plaster of Paris	26499-65-0	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Platinum (as Pt)	7440-06-4	----	----	----	----
Metal	----	1 mg/m3	3 mg/m3	----	----
Soluble salts	----	0.002 mg/m3	0.006 mg/m3	----	----
Polychlorobiphenyls      (Chlorodiphenyls)	----	1 mg/m3	3 mg/m3	----	X
Portland cement	65997-15-1	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Potassium hydroxide	1310-58-3	----	----	2 mg/m3	----
Propane	74-98-6	1,000 ppm	1,250 ppm	----	----
Propargyl alcohol	107-19-7	1 ppm	3 ppm	----	X
beta-Propiolactone      (see WAC 296-62-073)	57-57-8	----	----	----	----
Propionic acid	79-09-4	10 ppm	20 ppm	----	----
Propoxur (Baygon)	114-26-1	0.5 mg/m3	1.5 mg/m3	----	----
n-Propyl acetate	109-60-4	200 ppm	250 ppm	----	----
n-Propyl alcohol	71-23-8	200 ppm	250 ppm	----	X
n-Propyl nitrate	627-13-4	25 ppm	40 ppm	----	----
Propylene	----	Simple asphyxiant	----	----	----
Propylene dichloride      (1, 2-Dichloropropane)	78-87-5	75 ppm	110 ppm	----	----
Propylene glycol dinitrate	6423-43-4	0.05 ppm	0.15 ppm	----	X
Propylene glycol      monomethyl ether	107-98-2	100 ppm	150 ppm	----	----
Propylene imine	75-55-8	2 ppm	4 ppm	----	X
Propylene oxide (1,2-      Epoxypropane)	75-56-9	20 ppm	30 ppm	----	----
Propyne (Methyl acetylene)	74-99-7	1,000 ppm	1,250 ppm	----	----
Pyrethrum	8003-34-7	5 mg/m3	10 mg/m3	----	----
Pyridine	110-86-1	5 ppm	10 ppm	----	----
Quinone (p-Benzoquinone)	106-51-4	0.1 ppm	0.3 ppm	----	----
RDX (Cyclonite)	----	1.5 mg/m3	3.0 mg/m3	----	X
Resorcinol	108-46-3	10 ppm	20 ppm	----	----
Rhodium (as Rh) Insoluble      compounds,	7440-16-6	----	----	----	----
Metal fumes and dusts	----	0.1 mg/m3	0.3 mg/m3	----	----
Soluble compounds, salts	----	0.001 mg/m3	0.003 mg/m3	----	----
Ronnel	299-84-3	10 mg/m3	20 mg/m3	----	----
Rosin core solder, pyrolysis      products (as formaldehyde)	8050-09-7	0.1 mg/m3	0.3 mg/m3	----	----
Rotenone	83-79-4	5 mg/m3	10 mg/m3	----	----
Rouge	----	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Rubber solvent (naphtha)	8030-30-6	100 ppm	150 ppm	----	----
Selenium compounds (as Se)	7782-49-2	0.2 mg/m3	0.6 mg/m3	----	----
Selenium hexafluoride (as Se)	7783-79-1	0.05 ppm	0.15 ppm	----	----
Sesone (Crag herbicide)	136-78-7	10 mg/m3	20 mg/m3	----	----
Silane (see Silicon tetrahydride)	7803-62-5	5 ppm	10 ppm	----	----
Silica, amorphous, precipitated      and gel	112926-00-8	6 mg/m3	12 mg/m3	----	----
Silica, amorphous, diatomaceous      earth, containing less than      1% crystalline silica	61790-53-2	----	----	----	----
Total partiuclate	----	6 mg/m3	12 mg/m3	----	----
Respirable fraction	----	3 mg/m3	6 mg/m3	----	----
Silica, crystalline cristobalite	----	----	----	----	----
Respirable fraction	14464-46-1	0.05 mg/m3	0.15 mg/m3	----	----
Silica, crystalline quartz	----	----	----	----	----
Respirable fraction	14808-60-7	0.1 mg/m3	0.3 mg/m3	----	----
Silica, crystalline tripoli      (as quartz)	----	----	----	----	----
Respirable fraction	1317-95-9	0.1 mg/m3	0.3 mg/m3	----	----
Silica, crystalline tridymite	----	----	----	----	----
Respirable fraction	15468-32-3	0.05 mg/m3	0.15 mg/m3	----	----
Silica, fused	----	----	----	----	----
Respirable fraction	60676-86-0	0.1 mg/m3	0.3 mg/m3	----	----
Silicates (less than 1% crystalline silica )	----	----	----	----	----
Mica	----	----	----	----	----
Respirable particulate	12001-26-2	3 mg/m3	6 mg/m3	----	----
Soapstone	----	----	----	----	----
Total particulate	----	6 mg/m3	12 mg/m3	----	----
Respirable fraction	----	3 mg/m3	6 mg/m3	----	----
Talc (containing asbestos)           (see WAC           296-62-07705)	----	----	----	----	----
Talc (containing no           asbestos)	----	----	----	----	----
Respirable fraction	14807-96-6	2 mg/m3	4 mg/m3	----	----
Tremolite      (see WAC      296-62-07705)	----	----	----	----	----
Silicon	7440-21-3	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Silicon carbide	409-21-2	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Silicon tetrahydride (Silane)	7803-62-5	5 ppm	10 ppm	----	----
Silver, metal dust and soluble      compounds (as Ag)	7440-22-4	0.01 mg/m3	0.03 mg/m3	----	----
Soapstone	----	----	----	----	----
Total particulate	----	6 mg/m3	12 mg/m3	----	----
Respirable fraction	----	3 mg/m3	6 mg/m3	----	----
Sodium azide (as HN3 or NaN3)	26628-22-8	----	----	0.1 ppm	X
Sodium bisulfite	7631-90-5	5 mg/m3	10 mg/m3	----	----
Sodium-2,      4-dichloro-phenoxyethyl      sulfate (Crag herbicide)	136-78-7	10 mg/m3	20 mg/m3	----	----
Sodium fluoroacetate	62-74-8	0.05 mg/m3	0.15 mg/m3	----	X
Sodium hydroxide	1310-73-2	----	----	2 mg/m3	----
Sodium metabisulfite	7681-57-4	5 mg/m3	10 mg/m3	----	----
Starch	9005-25-8	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Stibine	7803-52-3	0.1 ppm	0.3 ppm	----	----
Stoddard solvent	8052-41-3	100 ppm	150 ppm	----	----
Strychnine	57-24-9	0.15 mg/m3	0.45 mg/m3	----	----
Styrene (Phenylethylene,      Vinyl benzene)	100-42-5	50 ppm	100 ppm	----	----
Subtilisins	9014-01-1	----	0.00006 mg/m3	----	----
			(60 min.)
Sucrose	57-50-1	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Sulfotep (TEDP)	3689-24-5	0.2 mg/m3	0.6 mg/m3	----	X
Sulfur dioxide	7446-09-5	2 ppm	5 ppm	----	----
Sulfur hexafluoride	2551-62-4	1,000 ppm	1,250 ppm	----	----
Sulfuric acid	7664-93-9	1 mg/m3	3 mg/m3	----	----
Sulfur monochloride	10025-67-9	----	----	1 ppm	----
Sulfur pentafluoride	5714-22-1	----	----	0.01 ppm	----
Sulfur tetrafluoride	7783-60-0	----	----	0.1 ppm	----
Sulfuryl fluoride	2699-79-8	5 ppm	10 ppm	----	----
Sulprofos	35400-43-2	1 mg/m3	3 mg/m3	----	----
Systox (Demeton)	8065-48-3	0.01 ppm	0.03 ppm	----	X
2, 4, 5-T	93-76-5	10 mg/m3	20 mg/m3	----	----
Talc (containing asbestos)      (see WAC 296-62-07705)	----	----	----	----	----
Talc (containing no asbestos)	----	----	----	----	----
Respirable fraction	14807-96-6	2 mg/m3	4 mg/m3	----	----
Tantalum	----	----	----	----	----
Metal and oxide dusts	7440-25-7	5 mg/m3	10 mg/m3	----	----
TEDP (Sulfotep)	3689-24-5	0.2 mg/m3	0.6 mg/m3	----	X
Tellurium and compounds (as Te)	13494-80-9	0.1 mg/m3	0.3 mg/m3	----	----
Tellurium hexafluoride (as Te)	7783-80-4	0.02 ppm	0.06 ppm	----	----
Temephos (Abate)	3383-96-8	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
TEPP	107-49-3	0.004 ppm	0.012 ppm	----	X
Terphenyls	26140-60-3	----	----	0.5 ppm	----
1, 1, 1, 2-Tetrachloro-2,      2-difluoroethane	76-11-0	500 ppm	625 ppm	----	----
1, 1, 2, 2-Tetrachloro-1,      2-difluoroethane	76-12-0	500 ppm	625 ppm	----	----
1, 1, 2, 2-Tetrachloroethane	79-34-5	1 ppm	3 ppm	----	X
Tetrachloroethylene      (Perchloroethylene)	127-18-4	25 ppm	38 ppm	----	----
Tetrachloromethane      (Carbon tetrachloride)	56-23-5	2 ppm	4 ppm	----	X
Tetrachloronaphthalene	1335-88-2	2 mg/m3	4 mg/m3	----	X
Tetraethyl lead (as Pb)	78-00-2	0.075 mg/m3	0.225 mg/m3	----	X
Tetrahydrofuran	109-99-9	200 ppm	250 ppm	----	----
Tetramethyl lead (as Pb)	75-74-1	0.075 mg/m3	0.225 mg/m3	----	X
Tetramethyl succinonitrile	3333-52-6	0.5 ppm	1.5 ppm	----	X
Tetranitromethane	509-14-8	1 ppm	3 ppm	----	----
Tetrasodium pyrophosphate	7722-88-5	5 mg/m3	10 mg/m3	----	----
Tetryl (2, 4, 6-trinitrophenyl-      methylnitramine)	479-45-8	1.5 mg/m3	3 mg/m3	----	X
Thallium (soluble compounds)      (as Tl)	7440-28-0	0.1 mg/m3	0.3 mg/m3	----	X
4, 4-Thiobis      (6-tert-butyl-m-cresol)	96-69-5	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Thioglycolic acid	68-11-1	1 ppm	3 ppm	-----	X
Thionyl chloride	7719-09-7	----	----	1 ppm	----
Thiram      (see WAC 296-62-07519)	137-26-8	5 mg/m3	10 mg/m3	----	----
Tin (as Sn)	----	----	----	----	----
Inorganic compounds (except      oxides)	7440-31-5	2 mg/m3	4 mg/m3	----	----
Tin (as Sn)	----	----	----	----	----
Organic compounds	7440-31-5	0.1 mg/m3	0.3 mg/m3	----	X
Tin oxide (as Sn)	21651-19-4	2 mg/m3	4 mg/m3	----	----
Titanium dioxide	13463-67-7	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Toluene	108-88-3	100 ppm	150 ppm	----	----
Toluene-2, 4-diisocyanate (TDI)	584-84-9	0.005 ppm	0.02 ppm	-----	----
m-Toluidine	108-44-1	2 ppm	4 ppm	----	X
o-Toluidine	95-53-4	2 ppm	4 ppm	----	X
p-Toluidine	106-49-0	2.0 ppm	4 ppm	----	X
Toxaphene      (Chlorinated camphene)	8001-35-2	0.5 mg/m3	1 mg/m3	----	X
Tremolite (see WAC      296-62-07705)	----	----	----	----	----
Tributyl phosphate	126-73-8	0.2 ppm	0.6 ppm	----	----
Trichloroacetic acid	76-03-9	1 ppm	3 ppm	----	----
1, 2, 4-Trichlorobenzene	120-82-1	----	----	5 ppm	----
1, 1, 1-Trichloroethane      (Methyl chloroform)	71-55-6	350 ppm	450 ppm	----	----
1, 1, 2-Trichloroethane	79-00-5	10 ppm	20 ppm	----	----
Trichloroethylene	79-01-6	50 ppm	200 ppm	----	----
Trichlorofluoromethane	75-69-4	----	----	1,000 ppm	----
Trichloromethane      (Chloroform)	67-66-3	2 ppm	4 ppm	----	----
Trichloronaphthalene	1321-65-9	5 mg/m3	10 mg/m3	----	X
1, 2, 3-Trichloropropane	96-18-4	10 ppm	20 ppm	----	X
1, 1, 2-Trichloro-1, 2,      2-trifluoroethane	76-13-1	1,000 ppm	1,250 ppm	----	----
Tricyclohexyltin hydroxide      (Cyhexatin)	13121-70-5	5 mg/m3	10 mg/m3	----	----
Triethylamine	121-44-8	10 ppm	15 ppm	----	----
Trifluorobromomethane	75-63-8	1,000 ppm	1,250 ppm	----	----
Trimellitic anhydride	552-30-7	0.005 ppm	0.015 ppm	----	----
Trimethylamine	75-50-3	10 ppm	15 ppm	----	----
Trimethyl benzene	25551-13-7	25 ppm	38 ppm	----	----
Trimethyl phosphite	121-45-9	2 ppm	4 ppm	----	----
2, 4, 6-Trinitrophenol      (Picric acid)	88-89-1	0.1 mg/m3	0.3 mg/m3	----	X
2, 4, 6-Trinitrophenyl-      methylnitramine      (Tetryl)	479-45-8	1.5 mg/m3	3 mg/m3	-----	X
2, 4, 6-Trinitrotoluene (TNT)	118-96-7	0.5 mg/m3	1.5 mg/m3	----	X
Triorthocresyl phosphate	78-30-8	0.1 mg/m3	0.3 mg/m3	----	X
Triphenyl amine	603-34-9	5 mg/m3	10 mg/m3	----	----
Triphenyl phosphate	115-86-6	3 mg/m3	6 mg/m3	----	----
Tungsten (as W)	7440-33-7	----	----	----	----
Soluble compounds	----	1 mg/m3	3 mg/m3	----	----
Insoluble compounds	----	5 mg/m3	10 mg/m3	----	----
Turpentine	8006-64-2	100 ppm	150 ppm	----	----
Uranium (as U)	7440-61-1	----	----	----	----
Soluble compounds	----	0.05 mg/m3	0.15 mg/m3	----	----
Insoluble compounds	----	0.2 mg/m3	0.6 mg/m3	----	----
n-Valeraldehyde	110-62-3	50 ppm	75 ppm	----	----
Vanadium (as V2O5)	----	----	----	----	----
Respirable fraction	1314-62-1	0.05 mg/m3	0.15 mg/m3	----	----
Vegetable oil mist	----	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Vinyl acetate	108-05-1	10 ppm	20 ppm	----	----
Vinyl benzene (Styrene)	100-42-5	50 ppm	100 ppm	----	----
Vinyl bromide	593-60-2	5 ppm	10 ppm	----	----
Vinyl chloride (Chloroethylene)      (see WAC 296-62-07329)	75-01-4	1 ppm	5 ppm	----	----
Vinyl cyanide (Acrylonitrile)      (see WAC 296-62-07336)	107-13-1	2 ppm	4 ppm	10 ppm	----
Vinyl cyclohexene dioxide	106-87-6	10 ppm	20 ppm	----	X
Vinyl toluene	25013-15-4	50 ppm	75 ppm	----	----
Vinylidene chloride      (1, 1-Dichloroethylene)	75-35-4	1 ppm	3 ppm	----	----
VM & P Naphtha	8032-32-4	300 ppm	400 ppm	----	----
Warfarin	81-81-2	0.1 mg/m3	0.3 mg/m3	----	----
Welding fumes      (total particulate)	----	5 mg/m3	10 mg/m3	----	----
Wood dust	----	----	----	----	----
Nonallergenic;           (All woods except           allergenics)	----	5 mg/m3	10 mg/m3	----	----
Allergenics (e.g. cedar,           mahogany and teak)	----	2.5 mg/m3	5 mg/m3	----	----
Xylenes (ortho, meta, and      para isomers)      (Dimethylbenzene)	1330-20-7	100 ppm	150 ppm	----	----
m-Xylene alpha, alpha-diamine	1477-55-0	----	----	0.1 mg/m3	X
Xylidine      (Dimethylaminobenzene)	1300-73-8	2 ppm	4 ppm	----	X
Yttrium	7440-65-5	1 mg/m3	3 mg/m3	----	----
Zinc chloride fume	7646-85-7	1 mg/m3	2 mg/m3	----	----
Zinc chromate (as CrO3)	Varies with compound	0.05 mg/m3	0.15 mg/m3	0.1 mg/m3	----
Zinc oxide	1314-13-2	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m	----	----
Zinc oxide fume	1314-13-2	5 mg/g3	10 mg/m3	----	----
Zinc stearate	557-05-1	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Zirconium compounds (as Zr)	7440-67-2	5 mg/m3	10 mg/m3	----	----