PERMANENT RULES
LABOR AND INDUSTRIES
Date of Adoption: October 1, 2003.
Purpose: Chapter 296-841 WAC, Respiratory hazards; and WAC 296-62-075, Air contaminants. The air contaminants rule was rewritten and reorganized for clarity and ease of use for employers and employees. We amended the rule in chapter 296-62 WAC to only apply to agriculture and created a new chapter, chapter 296-841 WAC, Respiratory hazards.
AMENDED SECTION:
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 WAC 296-62-07130 and 296-62-07515 to this section.
WAC 296-841-20010 Control employee exposures.
Moved requirements from WAC 296-62-07102 and 296-62-07501 to this section.
WAC 296-841-20015 Use respirators.
Moved requirements from WAC 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.
Citation of Existing Rules Affected by this Order: Amending WAC 296-62-075 Air contaminants.
Statutory Authority for Adoption: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060.
Adopted under notice filed as WSR 03-11-059 on May 19, 2003.
Number of Sections Adopted in Order to Comply with Federal Statute: New 0, Amended 0, Repealed 0; Federal Rules or Standards: New 7, Amended 1, Repealed 0; or Recently Enacted State Statutes: New 0, Amended 0, Repealed 0.
Number of Sections Adopted at Request of a Nongovernmental Entity: New 0, Amended 0, Repealed 0.
Number of Sections Adopted on the Agency's Own Initiative: New 7, Amended 1, Repealed 0.
Number of Sections Adopted in Order to Clarify, Streamline, or Reform Agency Procedures: New 0, Amended 0, Repealed 0.
Number of Sections Adopted Using Negotiated Rule Making:
New 0,
Amended 0,
Repealed 0;
Pilot Rule Making:
New 0,
Amended 0,
Repealed 0;
or Other Alternative Rule Making:
New 7,
Amended 1,
Repealed 0.
Effective Date of Rule:
January 1, 2004.
October 1, 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. |
(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-6261.4
RESPIRATORY HAZARDS
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.
| 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 through 296-62-07449 |
| 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
Control employee exposures
Use respirators
Notify employees
[]
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, or biological agent.
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 a PEL listed in Table 3
A substance at or above the action level specified in the rule for that substance
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. |
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 employee exposure to a level that removes the respiratory hazard, such as to a level below the PEL in Table 3
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
| Control: | For example: |
| Using a different chemical (substitution) | Choose a chemical with a lower evaporation rate or vapor pressure |
| Choose a chemical without hazardous ingredients | |
| Changing a process to lessen 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 | |
| Removing emissions at or near the source (local exhaust ventilation) | Install exhaust hoods or slots to capture emissions |
| Use an exhausted enclosure (like a blasting cabinet or laboratory hood) | |
| Diluting and removing emissions in the work area (general exhaust ventilation) | Allow natural air movement to create an adequate airflow through an area |
| Use mechanical fans | |
| Modify work practices | Change the position of the worker relative to the work so fumes, vapors, or smoke do not go into their face |
| Rotate employees Some specific rules prohibit the use of this control method |
Move employees to another job that is without exposure, on a schedule to keep their total exposure below the PEL |
[]
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
| Notify employees of: | As follows: |
| Any exposure result above the 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 | |
| An exposure to these substances: | In writing, as specified in the rule specific to the substance |
| Acrylonitrile | |
| Arsenic (inorganic) | |
| Asbestos | |
| Benzene | |
| Butadiene | |
| Cadmium | |
| Coke oven emissions | |
| Cotton dust | |
| 1,2-Dibromo-3-chloropropane | |
| Ethylene oxide | |
| Formaldehyde | |
| Lead | |
| Methylene chloride | |
| Methylenedianiline | |
| Vinyl chloride |
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 from 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. For more information about CAS registry numbers see the website: http://www.cas.org.
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 another time period is 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 in micrometers | 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 | ---- |
| 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 | ---- | 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 | 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 | ---- | ---- | 1.0 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 | 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 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 | 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 | ---- | ---- |
| 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 | 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) | 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 particulate | ---- | 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 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) (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 | ---- | 0.1 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 | ---- | ---- |
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Reviser's note: The typographical error in the above section occurred in the copy filed by the agency and appears in the Register pursuant to the requirements of RCW 34.08.040.
NEW SECTION
WAC 296-841-300
Definitions.
Ceiling
An exposure limit, measured over the shortest time period feasible, that must not be exceeded during any part of the employee's workday.
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. 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.
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.
Oxygen deficient
An atmosphere with an oxygen content below 19.5% by volume.
Permissible exposure limits (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.
Short-term exposure limit (STEL)
An exposure limit averaged over a short time period (usually measured for fifteen minutes) that must not be exceeded during any part of an employee's workday.
Time weighted average (TWA8)
An exposure limit averaged over eight hours that must not be exceeded during an employee's workday.
Toxic substance
Any chemical substance or biological agent, such as bacteria, virus, and fungus, which is any of the following:
Listed in the latest edition of the National Institute for Occupational Safety and Health (NIOSH) Registry of Toxic Effects of Chemical Substances (RTECS)
Shows positive evidence of an acute or chronic health hazard in testing conducted by, or known to, the employer.
The subject of a material 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.
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