Chapter 296-841 WAC
Last Update: 8/21/18AIRBORNE CONTAMINANTS
WAC Sections
| HTMLPDF | 296-841-099 | Definitions. |
| HTMLPDF | 296-841-100 | Scope. |
| HTMLPDF | 296-841-200 | Evaluate and control employee exposures. |
| HTMLPDF | 296-841-20003 | Employee protective measures. |
| HTMLPDF | 296-841-20005 | Exposure evaluations. |
| HTMLPDF | 296-841-20010 | Exposure controls. |
| HTMLPDF | 296-841-20015 | Respirators. |
| HTMLPDF | 296-841-20020 | Notification. |
| HTMLPDF | 296-841-20025 | Permissible exposure limits (PELs). |
DISPOSITION OF SECTIONS FORMERLY CODIFIED IN THIS TITLE
| 296-841-300 | Definitions. [Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060 and 29 C.F.R. 1910 Subpart Z. WSR 14-07-086, § 296-841-300, filed 3/18/14, effective 5/1/14. Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. WSR 07-05-062, § 296-841-300, filed 2/20/07, effective 4/1/07; WSR 04-18-079, § 296-841-300, filed 8/31/04, effective 11/1/04; WSR 03-20-115, § 296-841-300, filed 10/1/03, effective 1/1/04.] Repealed by WSR 17-18-075, filed 9/5/17, effective 10/6/17. Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. |
PDF296-841-099
Definitions.
Breathing zone. The space around and in front of an employee's nose and mouth, forming a hemisphere with a six to nine inch radius.
Ceiling limit. See Permissible exposure limits (PELs).
Dust. Solid particles suspended in air. Dusts are generated by handling, drilling, crushing, grinding, rapid impact, detonation, or decrepitation of organic or inorganic materials such as rock, ore, metal, coal, wood, grain, etc.
Exposed or exposure. The contact an employee has with a toxic substance, harmful physical agent or oxygen deficient condition, whether or not protection is provided by respirators or other personal protective equipment (PPE). Exposure can occur through various routes of entry, such as inhalation, ingestion, skin contact, or skin absorption.
Fume. Solid particles suspended in air, generated by condensation from the gaseous state, generally after volatilization from molten metals, etc.
Gas. A normally formless fluid which can be changed to the liquid or solid state by the effect of increased pressure or decreased temperature or both.
General exhaust ventilation. The general movement of air out of an area or permit-required confined space by mechanical or natural means.
Immediately dangerous to life or health (IDLH). An atmospheric condition that would:
(a) Cause an immediate threat to life;
(b) Cause permanent or delayed adverse health effects; or
(c) Interfere with an employee's ability to escape.
Mist. Liquid droplets suspended in air, generated by condensation from the gaseous to the liquid state or by breaking up a liquid into a dispersed state, such as by splashing, foaming, spraying or atomizing.
Nuisance dust (or inert dust). Dusts that, when inhaled, have little adverse effect on the lungs and do not produce significant organic disease or toxic effect when exposures are kept under reasonable control.
The biological reaction to these dusts in lung tissue has the following characteristics:
(a) The architecture of the air spaces remains intact;
(b) Scar tissue (collagen) is not formed to a significant extent; and
(c) The tissue reaction is potentially reversible.
Oxygen deficient. An atmosphere with an oxygen content below 19.5% by volume.
Permissible exposure limits (PEL). The amount of an airborne chemical, toxic substance, or other harmful agent that must not be exceeded during any part of the workday.
An airborne chemical or toxic substance can have 3 PEL values:
(a) TWA8. This is an 8-hour, time-weighted average limit.
(b) Short-term exposure limit (STEL). This is typically a 15-minute, time-weighted average limit.
(c) Ceiling limit (C). This is an instantaneous limit.
Short-term exposure limit (STEL). See Permissible exposure limits (PELs).
Temper. To condition air for a specific work environment by changing its temperature or moisture content.
Time weighted average (TWA8). See Permissible exposure limits (PELs).
Toxic substance. Any chemical substance or biological agent, such as bacteria, virus, and fungus, which is any of the following:
(a) Listed in the latest edition of the National Institute for Occupational Safety and Health (NIOSH) Registry of Toxic Effects of Chemical Substances (RTECS).
(b) Shows positive evidence of an acute or chronic health hazard in testing conducted by, or known to, the employer.
(c) The subject of a safety data sheet kept by or known to the employer showing the material may pose a hazard to human health.
Vapor. The gaseous form of a substance that is normally in the solid or liquid state.
Ventilation. Providing, circulating or exhausting air into or out of an area or space.
PDF296-841-100
Scope.
This chapter applies when your employees are, or could be, exposed to an airborne hazard.
(1) The following are examples of airborne contaminants that may become airborne hazards in some workplaces:
(a) Chemicals listed in Table 3, Permissible Exposure Limits (PELs) for Airborne Contaminants;
(b) Any substance:
(i) Listed in the latest edition of the NIOSH Registry of Toxic Effects of Chemical Substances;
(ii) For which positive evidence of an acute or chronic health hazard exists through tests conducted by, or known to, the employer;
(iii) That may pose a hazard to human health as stated on a safety data sheet (SDS) kept by, or known to, the employer.
(c) Biological agents such as harmful bacteria, viruses or fungi.
Examples include:
(i) TB aerosols;
(ii) Anthrax;
(iii) Pesticides;
(iv) Chemicals used as crowd control agents, such as pepper spray; and
(v) Chemicals present at clandestine drug labs.
(2) Airborne contaminants exist in a variety of physical forms such as dusts, fibers, fogs, fumes, mists, gases, smoke, sprays, vapors, or aerosols.
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 17-18-075, § 296-841-100, filed 9/5/17, effective 10/6/17. Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060 and 29 C.F.R. 1910 Subpart Z. WSR 14-07-086, § 296-841-100, filed 3/18/14, effective 5/1/14. Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. WSR 07-05-062, § 296-841-100, filed 2/20/07, effective 4/1/07; WSR 06-08-087, § 296-841-100, filed 4/4/06, effective 9/1/06; WSR 05-17-168, § 296-841-100, filed 8/23/05, effective 1/1/06; WSR 04-18-079, § 296-841-100, filed 8/31/04, effective 11/1/04; WSR 03-20-115, § 296-841-100, filed 10/1/03, effective 1/1/04.]
PDF296-841-200
Evaluate and control employee exposures.
PDF296-841-20003
Employee protective measures.
Protect employees from potentially hazardous exposure while you perform your exposure evaluation, using all available resources to determine adequate protective measures.
Note: | • Resources include product labels, safety data sheets (SDSs), manufacturer recommendations, and industry protocols. |
PDF296-841-20005
Exposure evaluations.
(1) Conduct an exposure evaluation to determine or reasonably estimate whether an employee is or could be exposed to either of the following:
(a) An airborne contaminant above a permissible exposure limit (PEL) listed in Table 3; or
(b) Other airborne hazards, such as biological hazards.
Note: | 1. When evaluating air contaminants, keep in mind that oxygen deficient conditions may also occur due to: |
a. Processes such as fermentation, decomposition of organic matter, or combustion of fossil fuels. | |
b. Displacement by another gas such as nitrogen or carbon dioxide. | |
2. Rules for specific substances may contain additional requirements for determining employee exposure. | |
3. 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. |
(2) Conclude that an atmosphere is immediately dangerous to life or health (IDLH) when you cannot determine or reasonably estimate employee exposure.
(3) Do all the following when you perform your evaluation:
(a) Determine the form of the airborne contaminant, such as dust, mist, gas, or biological agent.
(b) Make sure you do not use the amount of protection provided to employees by respirators as a factor in determining whether employees are exposed to an airborne hazard.
(c) Make sure any air monitoring results used to determine employee exposures are based on personal air samples taken from, or representative of, the employee's breathing zone.
You may use area sampling to screen for the presence of an airborne contaminant; however, results from area sampling cannot be used if they do not adequately represent exposure of affected employees.
(d) Include potential emergency and rescue situations that may occur, such as equipment or power failures, uncontrolled chemical reactions, fire, explosion, or human error.
(e) Include workplace conditions such as work processes, types of material, exposure control methods, work practices, and environmental conditions.
(f) Address extended work periods. For work shifts longer than eight hours, evaluate the continuous eight-hour portion of the shift expected to have the highest average exposure concentration.
(4) Use either of the following types of documentation to conclusively demonstrate that employee exposure cannot meet or exceed any PEL for the airborne contaminant during any reasonably anticipated conditions:
(a) Personal air samples that represent an employee's usual or worst-case exposure during the entire shift; or
(b) Specific information about products, materials, or activities that provides for an estimate of the level of employee exposure such as safety data sheets (SDSs), observations, previous air sampling results, other measurements, calculations, or pesticide labels.
Note: | You should use methods of sampling and analysis that have been validated by the laboratory performing the analysis. |
(5) Use the following formula to evaluate employee exposure to two or more substances that have additive health effects:
Em | = | C1 | + | C2 | + | ... | + | Cn |
L1 | L2 | Ln |
The symbol | Is the … |
E | Equivalent exposure for the mixture. When the value of E is greater than 1, an airborne hazard is present. |
C | Concentration of a specific airborne contaminant. |
L | TWA8, STEL, or ceiling limit for that airborne contaminant, from Table 3, Permissible Exposure Limits (PELs) for Airborne Contaminants. |
Note: | 1. When results from your exposure evaluation indicate an airborne hazard, follow requirements in WAC 296-841-20010 through 296-841-20020 of this chapter. |
2. When changes occur that increase the level of exposure to an airborne hazard, you may need to conduct a new exposure evaluation to make sure exposure controls and other protective measures are sufficient. |
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 17-18-075, § 296-841-20005, filed 9/5/17, effective 10/6/17. Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060 and 29 C.F.R. 1910 Subpart Z. WSR 14-07-086, § 296-841-20005, filed 3/18/14, effective 5/1/14. Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. WSR 07-05-062, § 296-841-20005, filed 2/20/07, effective 4/1/07; WSR 04-18-079, § 296-841-20005, filed 8/31/04, effective 11/1/04; WSR 03-20-115, § 296-841-20005, filed 10/1/03, effective 1/1/04.]
PDF296-841-20010
Exposure controls.
IMPORTANT:
Respirators and other personal protective equipment are not exposure controls. Respirators may be used to protect employees while exposure controls are being installed or when it is not feasible to use exposure controls to remove or reduce the airborne hazard.
(1) Use feasible exposure controls to reduce employee exposure to one of the following:
(a) A level below the permissible exposure limits (PEL) in Table 3;
(b) A level that removes the airborne hazard, when no PEL is established;
(c) The lowest achievable level, when exposure cannot be reduced to below the PEL or the airborne hazard cannot be removed.
(2) Make sure exposure controls do not create or increase employee health hazards. For example, when ventilation systems are installed:
(a) Prevent contaminated exhaust air from either:
(i) Reentering the building in harmful amounts; or
(ii) Exposing any employee to a health hazard.
(b) Temper make-up air, when necessary.
(c) Prevent employee exposure to excessive air velocities.
(3) Use make-up air systems that will not interfere with the effectiveness of the exhaust air system.
For example, make sure enough make-up air is provided to replace the amount of air exhausted.
Note: | Table 1 provides examples of possible exposure controls. |
Table 1
Examples of Possible Controls
Preferred exposure controls include: | For example: |
Using a different chemical (this is also known as substitution) | Choose a chemical with a lower evaporation rate or vapor pressure |
Choose a chemical that is not hazardous | |
Changing a process to decrease emissions | Use hand rolling or paint dipping instead of paint spraying |
Bolt items instead of welding them | |
Separating employees from emissions areas and sources | Use control rooms |
Build an enclosure around process machinery or other emissions sources | |
Automate a process | |
Using local exhaust ventilation to remove emissions at or near the source | Install exhaust hoods or slots to capture emissions |
Use an exhausted enclosure (like a blasting cabinet or laboratory hood) |
Other exposure controls include: | For example: |
Using general exhaust ventilation to dilute and remove emissions in the work area | Allow natural air movement to create an adequate airflow through an area |
Note: | Use mechanical fans |
This is not recommended for control of highly toxic airborne contaminants such as carcinogens, where low exposures can still present a health hazard | |
Modifying work practices | Change the position of the employee relative to the work so fumes, vapors, or smoke are not directed into the employee's face |
Limiting the amount of time employees can spend in a contaminated area. | Establish a contaminant-free area for tasks such as prep work that do not need to be done in the exposure area |
Implementing an employee rotation schedule | Have employees alternate working in the exposure area so that each employee gets less overall exposure |
Note: | |
This control will increase the number of employees exposed to the airborne contaminant. Due to this risk, employee rotation is NOT recommended for highly toxic airborne contaminants such as carcinogens, where low exposures can still present a health hazard. |
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 17-18-075, § 296-841-20010, filed 9/5/17, effective 10/6/17; WSR 07-05-062, § 296-841-20010, filed 2/20/07, effective 4/1/07; WSR 04-18-079, § 296-841-20010, filed 8/31/04, effective 11/1/04; WSR 03-20-115, § 296-841-20010, filed 10/1/03, effective 1/1/04.]
PDF296-841-20015
Respirators.
Require employees to use respirators when airborne hazards have not been removed using feasible exposure controls. For example, use respirators at any of the following times:
(1) While exposure controls are being evaluated or put in place;
(2) When the airborne hazard is not completely removed;
(3) When exposure controls are NOT feasible.
PDF296-841-20020
Notification.
Notify employees who are or may be exposed to airborne 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
Notify employees of: | As follows: |
Any exposure result above a permissible exposure limit (PEL) | Within five business days, after the employee's exposure result is known to the employer |
The corrective action being taken to reduce employee exposure to or below the PEL | Within fifteen business days, after the employee's exposure result is known to the employer |
AND | |
The schedule for completion of the corrective action and any reasons why exposures cannot be lowered to below the PEL |
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 17-18-075, § 296-841-20020, filed 9/5/17, effective 10/6/17; WSR 07-05-062, § 296-841-20020, filed 2/20/07, effective 4/1/07; WSR 04-18-079, § 296-841-20020, filed 8/31/04, effective 11/1/04; WSR 03-20-115, § 296-841-20020, filed 10/1/03, effective 1/1/04.]
PDF296-841-20025
Permissible exposure limits (PELs).
IMPORTANT:
The following information applies to Table 3, Permissible Exposure Limits (PELs) for Airborne Contaminants.
(1) Ppm refers to parts of vapor or gas per million parts of air by volume, at 25 degrees C and 760 mm Hg pressure.
(2) Mg/m3 refers to milligrams of an airborne contaminant per cubic meter of air.
(3) F/cc refers to fibers per cubic centimeter of air.
(4) 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. For more information about CAS registry numbers see the website: http://www.cas.org.
(5) Short-term exposure limits (STEL) pertain to fifteen-minute exposure periods, unless another time period is noted in Table 3.
(6) An "X" in the "skin" column indicates the contaminant can be absorbed through the skin, either by airborne or direct contact.
(a) Personal protective equipment (PPE) to prevent skin contact may be needed to minimize the risk for adverse health effects when employees are exposed to these chemicals.
(b) Requirements for the use of gloves, coveralls, goggles, and other personal protective equipment can be found in WAC 296-800-160, Personal protective equipment (PPE).
(7) Nuisance dusts (also known as inert dusts) are included in the Table 3 listing, particulates not otherwise regulated (PNOR).
The PNOR listing in Table 3 also applies to other particulate airborne contaminants for which a specific PEL is NOT listed unless the airborne contaminant is found to require a lower limit.
(8) The respirable fraction of a particulate airborne contaminant is measured by sampling with a size-selector having the following characteristics:
Mean aerodynamic diameter in micrometers | Percent passing the selector |
1 | 97 |
2 | 91 |
3 | 74 |
4 | 50 |
5 | 30 |
6 | 17 |
7 | 9 |
8 | 5 |
10 | 1 |
Table 3 "Permissible Exposure Limits (PELs) for Airborne Contaminants"
Airborne contaminant | 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 | —— |
Actinolite (asbestiform) (as asbestos) (see WAC 296-62-077 and chapter 296-65 WAC) | —— | 0.1 f/cc | 1.0 f/cc (30 minutes) | —— | —— |
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 (Vinyl cyanide) (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 mg/m3 | 10 mg/m3 | —— | —— |
Aluminum (as Al) | 7429-90-5 | —— | —— | —— | —— |
Total particulate | —— | 10 mg/m3 | 20 mg/m3 | —— | —— |
Respirable fraction | —— | 5 mg/m3 | 10 mg/m3 | —— | —— |
Pyro powders | —— | 5 mg/m3 | 10 mg/m3 | —— | —— |
Welding fumes | —— | 5 mg/m3 | 10 mg/m3 | —— | —— |
Soluble salts | —— | 2 mg/m3 | 4 mg/m3 | —— | —— |
Alkyls (NOC) | —— | 2 mg/m3 | 4 mg/m3 | —— | —— |
Aluminum oxide (Alundum, Corundum) | 7429-90-5 | —— | —— | —— | —— |
Total particulate | —— | 10 mg/m3 | 20 mg/m3 | —— | —— |
Respirable fraction | —— | 5 mg/m3 | 10 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 mg/m3 | —— | —— |
Amosite (as asbestos) (see WAC 296-62-077 and chapter 296-65 WAC) | —— | 0.1 f/cc | 1.0 f/cc (30 minutes) | —— | —— |
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 |
Anthophyllite (asbestiform) (as asbestos) (see WAC 296-62-077 and chapter 296-65 WAC) | —— | 0.1 f/cc | 1.0 f/cc (30 minutes) | —— | —— |
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 | —— | —— | —— |
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 chapter 296-848 WAC) | 7440-38-2 | 0.01 mg/m3 | —— | —— | —— |
Arsenic, inorganic compounds (as As) (when use is not covered by chapter 296-848 WAC) | 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 and chapter 296-65 WAC) | —— | 0.1 f/cc | 1.0 f/cc (30 minutes) | —— | —— |
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 |
Azodrin (Monocrotophos) | 6923-22-4 | 0.25 mg/m3 | 0.75 mg/m3 | —— | —— |
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 | —— | —— |
Baygon (Propoxur) | 114-26-1 | 0.5 mg/m3 | 1.5 mg/m3 | —— | —— |
Benomyl | 17804-35-2 | —— | —— | —— | —— |
Total particulate | —— | 10 mg/m3 | 20 mg/m3 | —— | —— |
Respirable fraction | —— | 5 mg/m3 | 10 mg/m3 | —— | —— |
Benzene (see chapter 296-849 WAC) | 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) (see chapter 296-850 WAC) | 7440-41-7 | 0.0002 mg/m3 | 0.002 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 ppm | —— |
Boron trifluoride | 6737-07-2 | —— | —— | 1 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 (Chlorobromomethane) | 74-97-5 | 200 ppm | 250 ppm | —— | —— |
Bromoform | 15-25-2 | 0.5 ppm | 1.5 ppm | —— | X |
Butadiene (1,3-butadiene) (see WAC 296-62-07460) | 106-99-0 | 1 ppm | 5 ppm | —— | —— |
Butane | 106-97-8 | 800 ppm | 1,000 ppm | —— | —— |
Butanethiol (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 |
Butyl cellosolve (2-Butoxy ethanol) | 111-76-2 | 25 ppm | 38 ppm | —— | —— |
tert-Butyl chromate (as Cr) (see WAC 296-62-08003) | 1189-85-1 | 0.005 mg/m3 | —— | 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 and 296-155-174) | 1306-19-0 | 0.005 mg/m3 | —— | —— | —— |
Cadmium dust and salts (as Cd) (see WAC 296-62-074 and 296-155-174) | 7440-43-9 | 0.005 mg/m3 | —— | —— | —— |
Calcium arsenate (see chapter 296-848 WAC) | —— | 0.01 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 | 0.1 ppm | 0.3 ppm | —— | —— |
Carbonyl fluoride | 353-50-4 | 2 ppm | 5 ppm | —— | —— |
Catechol (Pyrocatechol) | 120-80-9 | 5 ppm | 10 ppm | —— | X |
Cellosolve acetate (2-Ethoxyethylacetate) | 111-15-9 | 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 | —— |
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) (see WAC 296-62-07329) | 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 (Nitrotrichloromethane) | 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 mg/m3 | 10 mg/m3 | —— | —— |
Chlorpyrifos | 2921-88-2 | 0.2 mg/m3 | 0.6 mg/m3 | —— | X |
Chromic acid and chromates (as Cr) (when the compound is not covered by WAC 296-62-08003) | Varies with compound | —— | —— | 0.1 mg/m3 | —— |
Chromium | —— | —— | —— | —— | —— |
Chromium (VI) compounds (as Cr) (when the compound is covered by WAC 296-62-08003) | —— | 0.005 mg/m3 | —— | —— | —— |
Chromium metal or Chromium (II) compounds Or Chromium (III) compounds | 7440-47-3 | 0.5 mg/m3 | —— | —— | —— |
Chromyl chloride (as Cr) (see WAC 296-62-08003) | 14977-61-8 | 0.005 mg/m3 | —— | —— | —— |
Chrysene (Coal tar pitch volatiles) | 65996-93-2 | 0.2 mg/m3 | 0.6 mg/m3 | —— | —— |
Chrysotile (as asbestos) (see WAC 296-62-077 and chapter 296-65 WAC) | —— | 0.1 f/cc | 1.0 f/cc (30 minutes) | —— | —— |
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) Acridine Anthracene Benzo (a) pyrene Chrysene Phenanthrene Pyrene | 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 | —— | —— | —— |
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) (waste sorting, blending, cleaning, willowing and garetting) (see WAC 296-62-14533) | —— | 1 mg/m3 | —— | —— | —— |
Corundum (Aluminum oxide) | 7429-90-5 | —— | —— | —— | —— |
Total particulate | —— | 10 mg/m3 | 20 mg/m3 | —— | —— |
Respirable fraction | —— | 5 mg/m3 | 10 mg/m3 | —— | —— |
Crag herbicide (Sesone, Sodium-2, 4-dichloro-phenoxyethyl sulfate) | 136-78-7 | —— | —— | —— | —— |
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 |
Crocidolite (as asbestos) (see WAC 296-62-077 and chapter 296-65 WAC) | —— | 0.1 f/cc | 1.0 f/cc (30 minutes) | —— | —— |
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 | —— | —— |
DBCP (1,2-Dibromo-3- chloropropane) (see WAC 296-62-07342) | 96-12-8 | 0.001 ppm | —— | 0.005 ppm | —— |
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 |
Dasanit (Fensulfothion) | 115-90-2 | 0.1 mg/m3 | 0.3 mg/m3 | —— | —— |
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 (Ethylidine chloride) | 75-34-3 | 100 ppm | 150 ppm | —— | —— |
1, 2-Dichloroethane (Ethylene dichloride) | 107-06-2 | 1 ppm | 2 ppm | —— | —— |
1, 1-Dichloroethylene (Vinylidene chloride) | 75-35-4 | 1 ppm | 3 ppm | —— | —— |
1, 2-Dichloroethylene (Acetylene dichloride) | 540-59-0 | 200 ppm | 250 ppm | —— | —— |
Dichloroethyl ether | 111-44-4 | 5 ppm | 10 ppm | —— | X |
Dichlorofluoromethane | 75-43-4 | 10 ppm | 20 ppm | —— | —— |
Dichloromethane (Methylene chloride) (see chapter 296-859 WAC) | 75-09-2 | 25 ppm | 125 ppm | —— | —— |
1, 1-Dichloro-1-nitroethane | 594-72-9 | 2 ppm | 10 ppm | —— | —— |
Dichlorophenoxyacetic acid (2, 4-D) | 94-75-7 | 10 mg/m3 | 20 mg/m3 | —— | —— |
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 | —— | —— |
Difolatan (Captafol) | 2425-06-1 | 0.1 mg/m3 | 0.3 mg/m3 | —— | X |
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 | 100 ppm | 150 ppm | —— | —— |
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 |
3, 5-Dinitro-o-toluamide (Dinitolmide) | 148-01-6 | 5 mg/m3 | 10 mg/m3 | —— | —— |
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 | —— | —— |
Ethanol (Ethyl alcohol) | 64-17-5 | 1,000 ppm | 1,250 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 | 38 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 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 chapter 296-855 WAC) | 75-21-8 | 1 ppm | 5 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 | 38 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 chapter 296-856 WAC) | 50-00-0 | 0.75 ppm | 2 ppm | —— | —— |
Formamide | 75-12-7 | 20 ppm | 30 ppm | —— | —— |
Formic acid | 64-18-6 | 5 ppm | 10 ppm | —— | —— |
Furadon (carbofuran) | 1563-66-2 | 0.1 mg/m3 | 0.3 mg/m3 | —— | —— |
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 | —— | —— |
Glutaraldehyde | 111-30-8 | —— | —— | 0.2 ppm | —— |
Glycerin mist | 56-81-5 | —— | —— | —— | —— |
Total particulate | —— | 10 mg/m3 | 20 mg/m3 | —— | —— |
Respirable fraction | —— | 5 mg/m3 | 10 mg/m3 | —— | —— |
Glycidol (2, 3-Epoxy-1-propanol) | 556-52-5 | 25 ppm | 38 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 | —— | —— |
Lannate (Methomyl) | 16752-77-5 | 2.5 mg/m3 | 5 mg/m3 | —— | —— |
Lead, inorganic (as Pb) (see WAC 296-62-07521 and 296-155-176) | 7439-92-1 | 0.05 mg/m3 | —— | —— | —— |
Lead arsenate (as Pb) (see WAC 296-62-07521, 296-155-176, and chapter 296-848 WAC) | 3687-31-8 | 0.05 mg/m3 | —— | —— | —— |
Lead chromate (as Pb) (see WAC 296-62-08003, 296-62-07521, and | 7758-97-6 | 0.05 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 compounds (as Mn) | 7439-96-5 | —— | —— | 5 mg/m3 | —— |
Manganese cyclopentadienyl tricarbonyl (as Mn) | 12079-65-1 | 0.1 mg/m3 | 0.3 mg/m3 | —— | X |
Manganese tetroxide and fume (as Mn) | 7439-96-5 | 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 | —— | —— |
MBOCA (4, 4'-Methylene bis (2-chloro-aniline)) (see WAC 296-62-073) | 101-14-4 | —— | —— | —— | X |
MDA (4, 4-Methylene dianiline) (see WAC 296-62-076 and 296-155-173) | 101-77-9 | 0.01 ppm | 0.1 ppm | —— | X |
MDI (Methylene bisphenyl isocyanate) (Diphenylmethane diisocyanate) | 101-68-8 | —— | —— | 0.02 ppm | —— |
MEK (Methyl ethyl ketone) (2-Butanone) | 78-93-3 | 200 ppm | 300 ppm | —— | —— |
MEKP (Methyl ethyl ketone peroxide) | 1338-23-4 | —— | —— | 0.2 ppm | —— |
Mercury (as Hg) | 7439-97-6 | —— | —— | —— | —— |
Aryl and inorganic | —— | 0.1 mg/m3 | 0.3 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 | —— | —— |
Methanol (Methyl alcohol) | 67-56-1 | 200 ppm | 250 ppm | —— | X |
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 |
2-Methoxyethyl acetate (Methyl cellosolve acetate) | 110-49-6 | 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 | —— | —— | —— | X |
Methylene bis (4-cyclohexylisocyanate) | 5124-30-1 | —— | —— | 0.01 ppm | —— |
Methylene chloride (Dichloromethane) (see chapter 296-859 WAC) | 75-09-2 | 25 ppm | 125 ppm | —— | —— |
4, 4-Methylene dianiline (MDA) (see WAC 296-62-076 and 296-155-173) | 101-77-9 | 0.01 ppm | 0.1 ppm | —— | X |
Methyl ethyl ketone (MEK) (2-Butanone) | 78-93-3 | 200 ppm | 300 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) Respirable fraction | 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 | —— | 10 mg/m3 | 20 mg/m3 | —— | —— |
Monochlorobenzene (Chlorobenzene) | 108-90-7 | 75 ppm | 113 ppm | —— | —— |
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 oxide (Nitrous oxide) | 10024-97-2 | 50 ppm | 75 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 | —— | —— |
Nuisance dusts (see Particulates not otherwise regulated) | —— | —— | —— | —— | —— |
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 See requirements in other chapters such as: Chapter 296-809 WAC, Confined spaces; chapter 296-843 WAC, Hazardous waste operations; chapter 296-824 WAC, Emergency response; WAC 296-62-100, Oxygen deficient atmospheres | —— | —— | —— | —— | —— |
Oxygen difluoride | 7783-41-7 | —— | —— | 0.05 ppm | —— |
Ozone | 10028-15-6 | 0.1 ppm | 0.3 ppm | —— | —— |
Paper fiber (Cellulose) | 9004-34-6 | —— | —— | —— | —— |
Total particulate | —— | 10 mg/m3 | 20 mg/m3 | —— | —— |
Respirable fraction | —— | 5 mg/m3 | 10 mg/m3 | —— | —— |
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 (see coal tar pitch volatiles) | —— | —— | |||
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 mg/m3 | 10 mg/m3 | —— | —— |
Petroleum distillates (Naptha, rubber solvent) | —— | 100 ppm | 150 ppm | —— | —— |
Phenacyl chloride (a-Chloroacetophenone) | 532-21-4 | 0.05 ppm | 0.15 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 | 0.3 ppm | —— | —— |
Phosphine | 7803-51-2 | 0.3 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) | —— | —— | —— | —— | —— |
42% Chlorine (PCB) | 53469-21-9 | 1 mg/m3 | 3 mg/m3 | —— | X |
54% Chlorine (PCB) | 11097-69-1 | 0.5 mg/m3 | 1.5 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 | —— | —— |
Pyrocatachol (Catechol) | 120-80-9 | 5 ppm | 10 ppm | —— | X |
Quinone (p-Benzoquinone) | 106-51-4 | 0.1 ppm | 0.3 ppm | —— | —— |
RDX (Cyclonite) | —— | 1.5 mg/m3 | 3 mg/m3 | —— | X |
Resorcinol | 108-46-3 | 10 ppm | 20 ppm | —— | —— |
Rhodium (as Rh) | 7440-16-6 | —— | —— | —— | —— |
Insoluble compounds, 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 | —— | —— | —— | —— |
Total particulate | —— | 10 mg/m3 | 20 mg/m3 | —— | —— |
Respirable fraction | —— | 5 mg/m3 | 10 mg/m3 | —— | —— |
Sevin (Carbaryl) | 63-25-2 | 5 mg/m3 | 10 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 particulate | —— | 6 mg/m3 | 12 mg/m3 | —— | —— |
Respirable fraction | —— | 3 mg/m3 | 6 mg/m3 | —— | —— |
Silica, crystalline cristobalite | —— | —— | —— | —— | —— |
Respirable fraction Applies where the exposure limit in chapter 296-840 WAC is not in effect. | 14464-46-1 | 0.05 mg/m3 | 0.15 mg/m3 | —— | —— |
Silica, crystalline quartz | —— | —— | —— | —— | —— |
Respirable fraction Applies where the exposure limit in chapter 296-840 WAC is not in effect. | 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 Applies where the exposure limit in chapter 296-840 WAC is not in effect. | 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 fraction | 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) (as asbestos) (see WAC 296-62-07705 and chapter 296-65 WAC) | —— | 0.1 f/cc | 1.0 f/cc (30 minutes) | —— | —— |
Talc (containing no asbestos) | —— | —— | —— | —— | —— |
Respirable fraction | 14807-96-6 | 2 mg/m3 | 4 mg/m3 | —— | —— |
Tremolite (asbestiform) (as asbestos) (see WAC 296-62-07705 and chapter 296-65 WAC) | —— | 0.1 f/cc | 1.0 f/cc (30 minutes) | —— | —— |
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 | —— | —— | —— | —— |
Total particulate | —— | 10 mg/m3 | 20 mg/m3 | —— | —— |
Respirable fraction | —— | 5 mg/m3 | 10 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 (2, 4, 5- tri- chlorophenoxyacetic acid) | 93-76-5 | 10 mg/m3 | 20 mg/m3 | —— | —— |
Talc (containing asbestos) (as asbestos) (see WAC 296-62-07705 and chapter 296-65 WAC) | —— | 0.1 f/cc | 1.0 f/cc (30 minutes) | —— | —— |
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 | —— | —— |
TDI (Toluene-2, 4-diisocyanate) | 584-84-9 | 0.005 ppm | 0.02 ppm | —— | —— |
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 | —— | —— |
Thiodan (Endosulfan) | 115-29-7 | 0.1 mg/m3 | 0.3 mg/m3 | —— | X |
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 | 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 | —— | —— |
TNT (2, 4, 6-Trinitrotoluene) | 118-96-7 | 0.5 mg/m3 | 1.5 mg/m3 | —— | X |
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 (asbestiform) (as asbestos) (see WAC 296-62-07705 and chapter 296-65 WAC) | —— | 0.1 f/cc | 1.0 f/cc (30 minutes) | —— | —— |
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 (Fluorotrichloromethane) | 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 | 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 Cr) (see WAC 296-62-08003) | Varies with compound | 0.005 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 | —— | —— |
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060, and chapter 49.17 RCW. WSR 18-17-156, § 296-841-20025, filed 8/21/18, effective 12/12/18; WSR 18-07-098, § 296-841-20025, filed 3/20/18, effective 4/23/18. Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 17-18-075, § 296-841-20025, filed 9/5/17, effective 10/6/17; WSR 07-05-062, § 296-841-20025, filed 2/20/07, effective 4/1/07; WSR 04-18-079, § 296-841-20025, filed 8/31/04, effective 11/1/04.]