WSR 17-22-111 PROPOSED RULES DEPARTMENT OF LABOR AND INDUSTRIES [Filed October 31, 2017, 11:13 a.m.] Original Notice. Preproposal statement of inquiry was filed as WSR 16-13-121. Title of Rule and Other Identifying Information: Chapter 296-840 WAC, Respirable crystalline silica; WAC 296-841-20025 Permissible exposure limits (PELs) and 296-307-62625 Permissible exposure limits of air contaminants. Hearing Location(s): On December 15, 2017, at 9:00 a.m., at the Department of Labor and Industries (L&I), 7273 Linderson Way S.W., Room S119, Tumwater, WA 98501. Date of Intended Adoption: January 23, 2018. Submit Written Comments to: Josefina Magana, P.O. Box 44620, Olympia, WA 98504-4620, email josefina.magana@lni.wa.gov, fax 360-902-5619, by December 22, 2017. Assistance for Persons with Disabilities: Contact Josefina Magana, phone 360-902-4233, fax 360-902-5619, email Josefina.Magana@lni.wa.gov, by December 1, 2017. Purpose of the Proposal and Its Anticipated Effects, Including Any Changes in Existing Rules: The Occupational Safety and Health Administration (OSHA) estimates that an approximate number of two million construction workers are exposed to respirable crystalline silica in over six hundred thousand workplaces and two hundred ninety-five thosand workers in over seventy-five thousand general industry and maritime workplaces. Thus, federal OSHA requirements pertaining to respirable crystalline silica in both 29 C.F.R. 1926.1153 (Construction) and 29 C.F.R. 1910.1053 (General Industry/Maritime) went into effect June 23, 2016.
The purpose of this proposal is to add a new chapter 296-840 WAC, Respirable crystalline silica, to address and limit worker exposure to respirable crystalline silica in workplaces, with the intent of curbing lung cancer incidents, silicosis, chronic obstructive pulmonary disease and kidney disease in Washington workers.
The division of occupational safety and health (DOSH) did not have a standard that specifically addressed respirable crystalline silica exposure in the workplace, thus we are combining OSHA's two rules into an entirely new chapter to ensure that Washington's OSHA's rules are "at-least-as-effective-as" those promulgated by OSHA. Furthermore, the following sections under WAC 296-841-20025 and 296-307-62625 will be updated to reference the respirable crystalline silica rule. The proposed changes include:
Amended Sections
WAC 296-841-20025 Permissible exposure limits (PELs) and 296-307-62625 Permissible exposure limits of air contaminants.
• | Update table to reflect current PEL requirements. |
New Sections
WAC 296-840-095 Definitions.
• | Add definitions for the following: Action level, competent person, construction work, director, DOSH, employee exposure, high-efficiency particulate air filter, objective data, PEL, physician or other licensed health care professional, regulated area, respirable crystalline silica, specialist. |
WAC 296-840-100 Scope and application.
• | Add this section to explain that this chapter covers occupational exposures to respirable crystalline silica. |
• | This section also provides exemptions to this proposed rule. |
WAC 296-840-105 Exposure assessment.
• | Add this section to address the following areas that relate to occupational exposures to respirable crystalline silica: |
- | PEL |
- | Exposure assessment |
- | Reassessment of exposures |
- | Methods of sample analysis |
- | Employee notification of assessment results |
- | Observation of monitoring |
WAC 296-840-110 Specified exposure control methods.
• | Add this section relating to construction work and other occupational exposures where the task performed is indistinguishable from a construction task identified in Table 1 of this proposed rule. |
• | Add language to this section relating to implementing control measures. |
• | Add language to this section relating to when respiratory protection is required. |
• | Add Table 1 to this section relating to specified exposure control methods when working with materials containing crystalline silica. |
WAC 296-840-115 Regulated areas.
• | Add this section for general industry/maritime, required to be established in areas where exposures exceed PEL and to limit access to the area. |
WAC 296-840-120 Methods of compliance.
• | Add methods of compliance where tasks listed in Table 1 do not apply, including engineering and work practice controls, as well as abrasive blasting. |
WAC 296-840-125 Respiratory protection.
• | Add this section that highlights requirements for respiratory protection. |
WAC 296-840-130 Respiratory protection program.
• | Add respiratory protection program in accordance with chapter 296-842 WAC, Respirators. |
• | Add respirator use in accordance with Table 1. |
WAC 296-840-135 Housekeeping.
• | Add this section that addresses how a contaminated space can be cleaned. |
WAC 296-840-140 Written exposure control plan.
• | Add requirements that apply to both general industry/maritime and construction industries. |
• | Add a written plan with a description of tasks that involve exposure to silica, engineering control work practices and respiratory protection. |
• | Add language that indicates employers should have written plan available to each employee. |
• | Add language for construction that requires procedures used to restrict access to work areas. |
• | Add requirement language relating to a competent person. |
WAC 296-840-145 Medical surveillance.
• | Add this section that requires medical surveillance to be available. Medical surveillance includes an initial examination, periodic examinations, and where needed examinations by a specialist. |
• | Add tuberculosis form to help ensure tuberculosis assessment is thorough. |
WAC 296-840-150 Communication of respirable crystalline silica hazards to employees.
• | Add section that requires employers to comply with chapter 296-901 WAC, Globally harmonized system for hazard communication. |
• | Add language that specifies what to include in posted signs. |
• | Add language indicating that employees must understand health hazards associated with silica, tasks that could result in exposure, and measures to protect workers from exposure. |
WAC 296-840-155 Recordkeeping.
• | Add this section indicating employers must maintain records of exposure and objective data that describes employee exposure, and medical surveillance methods. |
WAC 296-840-160 Effective dates.
• | Add language indicating when this proposed rule becomes effective for construction and general/maritime industry. |
WAC 296-840-165 Appendix A—Methods of sample analysis.
• | Add this section that explains the process employers are required to use when analyzing air samples and quality control procedures for respirable crystalline silica. |
Reasons Supporting Proposal: By law, L&I's DOSH is required to update our rules to be at-least-as-effective-as federal OSHA. Statute Being Implemented: Chapter 49.17 RCW. Rule is necessary because of federal law, 29 C.F.R. 1910.1053 Subpart Z and 29 C.F.R. 1926 Subpart Z. Name of Proponent: L&I, governmental. Name of Agency Personnel Responsible for Drafting: Chris Miller, Tumwater, Washington, 360-902-5516; Implementation and Enforcement: Anne Soiza, Tumwater, Washington, 360-902-5090. A school district fiscal impact statement is not required under RCW 28A.305.135. A cost-benefit analysis is not required under RCW 34.05.328. A cost-benefit analysis is not required as this rule making is adopting or incorporating by reference, without material change, federal statutes or regulatory changes. This rule proposal, or portions of the proposal, is exempt from requirements of the Regulatory Fairness Act because the proposal: Is exempt under RCW 19.85.061 because this rule making is being adopted solely to conform and/or comply with federal statute or regulations. Citation of the specific federal statute or regulation and description of the consequences to the state if the rule is not adopted: 29 C.F.R. 1910.1053 Subpart Z and 29 C.F.R. 1926 Subpart Z. If L&I doesn't adopt the new regulations, we would not be as-effective-as federal OSHA. October 31, 2017 Joel Sacks Director
AMENDATORY SECTION (Amending WSR 06-08-087, filed 4/4/06, effective 9/1/06)
WAC 296-307-62625 Permissible exposure limits of air contaminants.
IMPORTANT:
The following information applies to Table 3, Permissible 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 web site: 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.
• Requirements for the use of gloves, coveralls, goggles, and other personal protective equipment can be found in WAC 296-307-100.
• 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 |
Table 3 "Permissible Exposure Limits for Air Contaminants"
| | | | | |
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 |
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) |
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 |
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 |
—— |
—— |
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 |
—— |
—— |
—— |
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 |
—— |
—— |
—— |
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 |
—— |
—— |
—— |
—— |
—— |
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 |
71-43-2 |
1 ppm |
5 ppm |
—— |
—— |
Benzidine |
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 WAC 296-62-085) |
7440-41-7 |
((0.002)) 0.0002 mg/m3 |
((0.005)) 0.002 mg/m3 (30 min.) |
((0.025)) 0.02 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 (Chlorobromomthane) |
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 (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 CrOs) |
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) |
1306-19-0 |
0.005 mg/m3 |
—— |
—— |
—— |
Cadmium dust and salts (as Cd) |
7440-43-9 |
0.005 mg/m3 |
—— |
—— |
—— |
Calcium arsenate |
—— |
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) |
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 |
542-88-1 |
—— |
—— |
—— |
—— |
Chloromethyl methyl ether (Methyl chloromethyl ether) |
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 CrO3) |
Varies with compound |
0.1 mg/m3 |
0.3 mg/m3 |
—— |
—— |
Chromium, soluble, chromic and 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) (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 |
—— |
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) |
—— |
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 |
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) |
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) |
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 |
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) |
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 |
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 |
151-56-4 |
—— |
—— |
—— |
X |
Ethylene oxide |
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 |
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 |
—— |
—— |
Gluteraldehyde |
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) |
7439-92-1 |
0.05 mg/m3 |
—— |
—— |
—— |
Lead arsenate (as Pb) |
3687-31-8 |
0.05 mg/m3 |
—— |
—— |
—— |
Lead chromate (as Pb) |
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)) |
101-14-4 |
—— |
—— |
—— |
X |
MDA (4, 4-Methylene dianiline) |
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) |
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) |
101-14-4 |
—— |
—— |
—— |
X |
Methylene bis (4-cyclohexylisocyanate) |
5124-30-1 |
—— |
—— |
0.01 ppm |
—— |
Methylene chloride (Dichloromethane) |
75-09-2 |
25 ppm |
125 ppm |
—— |
—— |
4, 4-Methylene dianiline (MDA) |
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 |
134-32-7 |
—— |
—— |
—— |
—— |
beta-Naphthylamine |
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 |
92-93-3 |
—— |
—— |
—— |
—— |
p-Nitrochlorobenzene |
100-00-5 |
0.5 mg/m3 |
1.5 mg/m3 |
—— |
X |
4-Nitrodiphenyl |
—— |
—— |
—— |
—— |
—— |
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 |
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 |
—— |
—— |
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 (benzene soluble fraction) (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 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 |
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 only 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 only 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 only 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) |
—— |
—— |
—— |
—— |
—— |
Talc (containing no asbestos) |
—— |
—— |
—— |
—— |
—— |
Respirable fraction |
14807-96-6 |
2 mg/m3 |
4 mg/m3 |
—— |
—— |
Tremolite |
—— |
—— |
—— |
—— |
—— |
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 |
93-76-5 |
10 mg/m3 |
20 mg/m3 |
—— |
—— |
Talc (containing asbestos) |
—— |
—— |
—— |
—— |
—— |
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 |
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 |
—— |
—— |
—— |
—— |
—— |
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) |
75-01-4 |
1 ppm |
5 ppm |
—— |
—— |
Vinyl cyanide (Acrylonitrile) |
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 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 |
—— |
—— |
Reviser's note: The spelling 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.
Chapter 296 -840 WACRESPIRABLE CRYSTALLINE SILICA
NEW SECTION
WAC 296-840-095 Definitions.
For the purposes of this chapter the following definitions apply:
Action level. A concentration of airborne respirable crystalline silica of 25 μg/m3, calculated as an 8-hour time-weighted average (TWA).
Competent person. An individual who is capable of identifying existing and foreseeable respirable crystalline silica hazards in the workplace and who has authorization to take prompt corrective measures to eliminate or minimize them. The competent person must have the knowledge and ability necessary to fulfill the responsibilities set forth in WAC 296-840-140.
Construction work. All or any part of excavation, construction, erection, alteration, repair, demolition, and dismantling, of buildings and other structures and all operations in connection therewith; the excavation, construction, alteration and repair of sewers, trenches, caissons, conduits, pipe lines, roads and all operations pertaining thereto; the moving of buildings and other structures, and to the construction, alteration, repair, or removal of wharfs, docks, bridges, culverts, trestles, piers, abutments or any other construction, alteration, repair or removal work related thereto.
Director. The director of the department of labor and industries or his/her authorized representative.
DOSH. The division of occupational safety and health, Washington state department of labor and industries.
Employee exposure. The exposure to airborne respirable crystalline silica that would occur if the employee were not using a respirator.
High-efficiency particulate air (HEPA) filter. A filter that is at least 99.97 percent efficient in removing mono-dispersed particles of 0.3 micrometers in diameter.
Objective data. Information, such as air monitoring data from industry-wide surveys or calculations based on the composition of a substance, demonstrating employee exposure to respirable crystalline silica associated with a particular product or material or a specific process, task, or activity. The data must reflect workplace conditions closely resembling or with a higher exposure potential than the processes, types of material, control methods, work practices, and environmental conditions in the employer's current operations.
Permissible exposure limit (PEL). A concentration of airborne respirable crystalline silica of 50 μg/m3, calculated as an 8-hour TWA and/or a 15-minute short-term exposure limit (STEL). Short-term exposure limits for respirable crystalline silica, as defined in this chapter, can be found in WAC 296-841-20025 and 296-307-62625.
Physician or other licensed health care professional (PLHCP). An individual whose legally permitted scope of practice (i.e., license, registration, or certification) allows him or her to independently provide or be delegated the responsibility to provide some or all of the particular health care services required by WAC 296-840-145.
Regulated area. An area, demarcated by the employer, where an employee's exposure to airborne concentrations of respirable crystalline silica exceeds, or can reasonably be expected to exceed, the PEL.
Respirable crystalline silica. Quartz, cristobalite, and/or tridymite contained in airborne particles that are determined to be respirable by a sampling device designed to meet the characteristics for respirable-particle-size-selective samplers specified in the International Organization for Standardization (ISO) 7708:1995: Air quality – Particle size fraction definitions for health-related sampling.
Specialist. An American Board Certified Specialist in Pulmonary Disease or an American Board Certified Specialist in Occupational Medicine.
NEW SECTION
WAC 296-840-100 Scope and application.
This chapter applies to all occupational exposures to respirable crystalline silica, except for the following:
(1) Where employee exposure results from the processing of sorptive clays.
(2) Where documented objective data demonstrates that employee exposures to respirable crystalline silica will remain below 25 micrograms per cubic meter of air (25 μg/m3) as an 8-hour TWA and the 15-minute STEL as defined in this chapter under any foreseeable conditions.
NEW SECTION
WAC 296-840-105 Exposure assessment.
This section applies to all occupational exposures except for tasks performed according to the requirements in WAC 296-840-110.
(1) Permissible exposure limit (PEL). You must ensure that no employee is exposed to an airborne concentration of respirable crystalline silica in excess of the 8-hour TWA PEL or the 15-minute STEL.
(2) Exposure assessment. You must assess the exposure of each employee who is or may reasonably be expected to be exposed to respirable crystalline silica at or above the action level or above the 15-minute STEL in accordance with either the performance option in (a) of this subsection or the scheduled monitoring option in (b) of this subsection.
(a) Performance option. You must assess the 8-hour TWA and the STEL for each employee on the basis of any combination of air monitoring data or objective data sufficient to accurately characterize employee exposures to respirable crystalline silica.
(b) Scheduled monitoring option:
(i) You must perform initial monitoring to assess the 8-hour TWA and the STEL for each employee on the basis of personal breathing zone air samples that reflect the exposures of employees on each shift, for each job classification, in each work area.
(ii) Where several employees perform the same tasks on the same shift and in the same work area, you may sample a representative fraction of these employees in order to meet this requirement.
(iii) In representative sampling, you must sample the employee(s) who are expected to have the highest exposure to respirable crystalline silica.
(iv) If initial monitoring indicates that employee exposures are below the action level and below the STEL, you may discontinue monitoring for those employees whose exposures are represented by such monitoring.
(v) Where the most recent exposure monitoring indicates that employee exposures are at or above the action level but at or below the PEL, you must repeat such monitoring within six months of the most recent monitoring.
(vi) Where the most recent exposure monitoring indicates that employee exposures are above the PEL, the employer shall repeat such monitoring within three months of the most recent monitoring.
(vii) Where the most recent (noninitial) exposure monitoring indicates that employee exposures are below the action level and the STEL, you must repeat such monitoring within six months of the most recent monitoring until two consecutive measurements, taken seven or more days apart, are below the action level and the STEL, at which time the employer may discontinue monitoring for those employees whose exposures are represented by such monitoring, except as otherwise provided in subsection (3) of this section.
(3) Reassessment of exposures. You must reassess exposures whenever a change in the production, process, control equipment, personnel, or work practices may reasonably be expected to result in new or additional exposures at or above the action level and/or the STEL, or when the employer has any reason to believe that new or additional exposures at or above the action level and/or the STEL have occurred.
(4) Methods of sample analysis. You must ensure that all samples taken to satisfy the monitoring requirements of subsection (2) of this section are evaluated by a laboratory that analyzes air samples for respirable crystalline silica in accordance with the procedures in WAC 296-840-165 Appendix A—Methods of sample analysis of this chapter.
(5) Employee notification of assessment results.
(a) Individually notify each affected employee in writing of the results of that assessment or post the results in an appropriate location accessible to all affected employees in accordance with the following:
(i) Construction employers must notify affected employees within five working days after receiving any results of an exposure assessment in accordance with this rule.
(ii) All other employers must notify affected employees within fifteen working days after receiving any results of an exposure assessment in accordance with this rule.
(b) Whenever an exposure assessment indicates that employee exposure is above the PEL, you must describe in the written notification the corrective action being taken to reduce employee exposure to or below the PEL.
(6) Observation of monitoring.
(a) Where air monitoring is performed to comply with the requirements of this chapter, you must provide affected employees or their designated representatives an opportunity to observe any monitoring of employee exposure to respirable crystalline silica.
(b) When observation of monitoring requires entry into an area where the use of protective clothing or equipment is required for any workplace hazard, you must provide the observer with protective clothing and equipment at no cost and shall ensure that the observer uses such clothing and equipment.
NEW SECTION
WAC 296-840-110 Specified exposure control methods.
This section applies to construction work and other occupational exposures where the task performed is indistinguishable from a construction task listed in Table 1 of this section and the task will not be performed regularly in the same environment and conditions.
(1) For each employee engaged in a task identified in Table 1 of this section, you must fully and properly implement the engineering controls, work practices, and respiratory protection specified for the task in Table 1 of this section, unless you assess and limit the exposure of the employee to respirable crystalline silica in accordance with WAC 296-840-105.
(2) When implementing the control measures specified in Table 1 of this section, you must:
(a) For tasks performed indoors or in enclosed areas, provide a means of exhaust as needed to minimize the accumulation of visible airborne dust;
(b) For tasks performed using wet methods, apply water at flow rates sufficient to minimize release of visible dust;
(c) For measures implemented that include an enclosed cab or booth, ensure that the enclosed cab or booth:
(i) Is maintained as free as practicable from settled dust;
(ii) Has door seals and closing mechanisms that work properly;
(iii) Has gaskets and seals that are in good condition and working properly;
(iv) Is under positive pressure maintained through continuous delivery of fresh air;
(v) Has intake air that is filtered through a filter that is ninety-five percent efficient in the 0.3-10.0 μm range (e.g., MERV-16 or better); and
(vi) Has heating and cooling capabiliites.
(3) Where an employee performs more than one task in Table 1 of this section during the course of a shift, and the total duration of all tasks combined is more than four hours, the required respiratory protection for each task is the respiratory protection specified for more than four hours per shift. If the total duration of all tasks in Table 1 of this section combined is less than four hours, the required respiratory protection for each task is the respiratory protection specified for less than four hours per shift.
Table 1
Specified Exposure Control Methods When Working With Materials Containing Crystalline Silica
| | | |
Equipment/ Task |
Engineering and Work Practice Control Methods |
Required Respiratory Protection and Minimum Assigned Protection Factor (APF) |
≤ 4 hours/shift |
> 4 hours/shift |
(i) Stationary masonry saws |
Use saw equipped with integrated water delivery system that continuously feeds water to the blade. |
None |
None |
|
Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions. |
|
|
(ii) Hand-held power saws (any blade diameter) |
Use saw equipped with integrated water delivery system that continuously feeds water to the blade. |
|
|
|
Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions. |
|
|
|
- When used outdoors. - When used indoors or in an enclosed area. |
None APF 10 |
APF 10 APF 10 |
(iii) Hand-held power saws for cutting fiber-cement board (with blade diameter of 8 inches or less) |
For tasks performed outdoors only: |
|
|
Use saw equipped with commercially available dust collection system. |
None |
None |
|
Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions. |
|
|
|
Dust collector must provide the air flow recommended by the tool manufacturer, or greater, and have a filter with 99% or greater efficiency. |
|
|
(iv) Walk-behind saws |
Use saw equipped with integrated water delivery system that continuously feeds water to the blade. |
|
|
|
Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions. |
|
|
|
- When used outdoors. - When used indoors or in an enclosed area. |
None APF 10 |
None APF 10 |
(v) Drivable saws |
For tasks performed outdoors only: |
|
|
|
Use saw equipped with integrated water delivery system that continuously feeds water to the blade. |
None |
None |
|
Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions. |
|
|
(vi) Rig-mounted core saws or drills |
Use tool equipped with integrated water delivery system that supplies water to cutting surface. |
None |
None |
|
Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions. |
|
|
(vii) Hand-held and stand-mounted drills (including impact and rotary hammer drills) |
Use drill equipped with commercially available shroud or cowling with dust collection system. |
None |
None |
|
Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions. |
|
|
|
Dust collector must provide the air flow recommended by the tool manufacturer, or greater, and have a filter with 99% or greater efficiency and a filter-cleaning mechanism. |
|
|
|
Use a HEPA-filtered vacuum when cleaning holes. |
|
|
(viii) Dowel drilling rigs for concrete |
For tasks performed outdoors only: |
|
|
|
Use shroud around drill bit with a dust collection system. Dust collector must have a filter with 99% or greater efficiency and a filter-cleaning mechanism. |
APF 10 |
APF 10 |
|
Use a HEPA-filtered vacuum when cleaning holes. |
|
|
(ix) Vehicle-mounted drilling rigs for rock and concrete |
Use dust collection system with close capture hood or shroud around drill bit with a low-flow water spray or wet the dust at the discharge point from the dust collector. |
None |
None |
|
OR |
|
|
|
Operate from within an enclosed cab and use water for dust suppression on drill bit. |
None |
None |
(x) Jackhammers and hand-held powered chipping tools |
Use tool with water delivery system that supplies a continuous stream or spray of water at the point of impact. |
|
|
|
- When used outdoors. - When used indoors or in an enclosed area. |
None APF 10 |
None APF 10 |
|
OR |
|
|
|
Use tool equipped with commercially available shroud and dust collection system. |
|
|
|
Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions. |
|
|
|
Dust collector must provide the air flow recommended by the tool manufacturer, or greater, and have a filter with 99% or greater efficiency and a filter-cleaning mechanism. |
None |
APF 10 |
|
- When used outdoors. - When used indoors or in an enclosed area. |
APF 10 |
APF 10 |
(xi) Hand-held grinders for mortar removal (i.e., tuckpointing) |
Use grinder equipped with commercially available shroud and dust collection system. |
APF 10 |
APF 25 |
|
Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions. |
|
|
|
Dust collector must provide 25 cubic feet per minute (cfm) or greater of airflow per inch of wheel diameter and have a filter with 99% or greater efficiency and cyclonic preseparator or filter-cleaning mechanism. |
|
|
(xii) Hand-held grinders for uses other than mortar removal |
For tasks performed outdoors only: |
|
|
Use grinder equipped with integrated water delivery system that continuously feeds water to the grinding surface. |
None |
None |
|
Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions. |
|
|
|
OR |
|
|
|
Use grinder equipped with commercially available shroud and dust collection system. |
|
|
|
Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions. |
|
|
|
Dust collector must provide 25 cubic feet per minute (cfm) or greater of airflow per inch of wheel diameter and have a filter with 99% or greater efficiency and a cyclonic preseparator or filter-cleaning mechanism. |
None None |
None APF 10 |
|
- When used outdoors. - When used indoors or in an enclosed area. |
|
|
(xiii) Walk-behind milling machines and floor grinders |
Use machine equipped with integrated water delivery system that continuously feeds water to the cutting surface. |
None |
None |
|
Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions. |
|
|
|
OR |
|
|
|
Use machine equipped with dust collection system recommended by the manufacturer. |
None |
None |
|
Operate and maintain tool in accordance with manufacturer's instructions to minimize dust emissions. |
|
|
|
Dust collector must provide the air flow recommended by the manufacturer, or greater, and have a filter with 99% or greater efficiency and a filter-cleaning mechanism. |
|
|
|
When used indoors or in an enclosed area, use a HEPA-filtered vacuum to remove loose dust in between passes. |
|
|
(xiv) Small drivable milling machines (less than half-lane) |
Use machine equipped with supplemental water sprays designed to suppress dust. Water must be combined with a surfactant. |
None |
None |
|
Operate and maintain machine to minimize dust emissions. |
|
|
(xv) Large drivable milling machines (half-lane and larger) |
For cuts of any depth on asphalt only: |
None |
None |
Use machine equipped with exhaust ventilation on drum enclosure and supplemental water sprays designed to suppress dust. |
|
|
|
Operate and maintain machine to minimize dust emissions. |
|
|
|
For cuts of four inches in depth or less on any substrate: |
None |
None |
|
Use machine equipped with exhaust ventilation on drum enclosure and supplemental water sprays designed to suppress dust. |
|
|
|
Operate and maintain machine to minimize dust emissions. |
|
|
|
OR |
|
|
|
Use a machine equipped with supplemental water spray designed to suppress dust. Water must be combined with a surfactant. |
|
|
|
Operate and maintain machine to minimize dust emissions. |
|
|
(xvi) Crushing machines |
Use equipment designed to deliver water spray or mist for dust suppression at crusher and other points where dust is generated (e.g., hoppers, conveyers, sieves/sizing or vibrating components, and discharge points). |
None |
None |
|
Operate and maintain machine in accordance with manufacturer's instructions to minimize dust emissions. |
|
|
|
Use a ventilated booth that provides fresh, climate-controlled air to the operator, or a remote control station. |
|
|
(xvii) Heavy equipment and utility vehicles used to abrade or fracture silica-containing materials (e.g., hoe-ramming, rock ripping) or used during demolition activities involving silica-containing materials |
Operate equipment from within an enclosed cab. |
None |
None |
When employees outside of the cab are engaged in the task, apply water and/or dust suppressants as necessary to minimize dust emissions. |
None |
None |
(xviii) Heavy equipment and utility vehicles for tasks such as grading and excavating but not including: Demolishing, abrading or fracturing silica-containing materials |
Apply water and/or dust suppressants as necessary to minimize dust emissions. |
None |
None |
OR |
|
|
When the equipment operator is the only employee engaged in the task, operate equipment from within an enclosed cab. |
None |
None |
Reviser's note: The spelling 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 296-840-115 Regulated areas.
This section does not apply to occupational respirable crystalline silica exposures in construction work.
(1) Establishment. You must establish a regulated area wherever an employee's exposure to airborne concentrations of respirable crystalline silica is, or can reasonably be expected to be, in excess of the PEL.
(2) Demarcation. You must demarcate the regulated areas from the rest of the workplace in a manner that minimizes the number of employees exposed to respirable crystalline silica within the regulated area.
(3) You must post signs at all entrances to regulated areas that bear the legend specified in WAC 296-840-150(2).
(4) Access. You must limit access to regulated areas to:
(a) Persons authorized by the employer and required by work duties to be present in the regulated area;
(b) Any person entering such an area as a designated representative of employees for the purpose of exercising the right to observe monitoring procedures under WAC 296-840-105; and
(c) Any person authorized by the department or regulations issued under it to be in a regulated area.
(5) Provision of respirators. You must provide each employee and the employee's designated representative entering a regulated area with an appropriate respirator in accordance with WAC 296-840-125 and must require each employee and the employee's designated representative to use the respirator while in a regulated area.
NEW SECTION
WAC 296-840-120 Methods of compliance.
This section does not apply to tasks listed and performed in accordance with Table 1 of WAC 296-840-110 Specified exposure control methods.
(1) Engineering and work practice controls. You must use engineering and work practice controls to reduce and maintain employee exposure to respirable crystalline silica to or below the PEL, unless the employer can demonstrate that such controls are not feasible. Wherever such feasible engineering and work practice controls are not sufficient to reduce employee exposure to or below the PEL, you must nonetheless use them to reduce employee exposure to the lowest feasible level and must supplement them with the use of respiratory protection that complies with the requirements of WAC 296-840-125.
(2) Abrasive blasting. In addition to the requirements of this section, you must comply with chapter 296-818 WAC, safety standards for abrasive blasting and other applicable DOSH standards where abrasive blasting is conducted using crystalline silica containing blasting agents, or where abrasive blasting is conducted on substrates that contain crystalline silica.
NEW SECTION
WAC 296-840-125 Respiratory protection.
(1) Where respiratory protection is required by this section, you must provide each employee an appropriate respirator that complies with the requirements of this section and chapter 296-842 WAC, Respirators.
(2) Respiratory protection is required:
(a) Where exposures exceed the PEL during periods necessary to install or implement feasible engineering and work practice controls;
(b) Where exposures exceed the PEL during tasks, such as certain maintenance and repair tasks, for which engineering and work practice controls are not feasible;
(c) During tasks for which an employer has implemented all feasible engineering and work practice controls and such controls are not sufficient to reduce exposures to or below the PEL;
(d) During periods when an employee or employees are in a regulated area; and
(e) Where specified for tasks performed according to the requirements in Table 1 of WAC 296-840-110 Specified exposure control methods.
NEW SECTION
WAC 296-840-130 Respiratory protection program.
(1) Where respirator use is required by this chapter, you must institute a respiratory protection program in accordance with chapter 296-842 WAC, Respirators.
(2) Specified exposure control methods. For tasks listed in Table 1 of WAC 296-840-110, if you fully and properly implement the engineering controls, work practices, and respiratory protection described in Table 1 of WAC 296-840-110, you will be considered to be in compliance with WAC 296-840-125(1) and the requirements for selection of respirators in chapter 296-842 WAC with regard to exposure to respirable crystalline silica.
NEW SECTION
WAC 296-840-135 Housekeeping.
(1) You must not allow dry sweeping or dry brushing where such activity could contribute to employee exposure to respirable crystalline silica unless wet sweeping, HEPA-filtered vacuuming or other methods that minimize the likelihood of exposure are not feasible.
(2) You must not allow compressed air to be used to clean clothing or surfaces where such activity could contribute to employee exposure to respirable crystalline silica unless:
(a) The compressed air is used in conjunction with a ventilation system that effectively captures the dust cloud created by the compressed air; or
(b) No alternative method is feasible.
NEW SECTION
WAC 296-840-140 Written exposure control plan.
(1) You must establish and implement a written exposure control plan that contains at least the following elements:
(a) A description of the tasks in the workplace that involve exposure to respirable crystalline silica;
(b) A description of the engineering controls, work practices, and respiratory protection used to limit employee exposure to respirable crystalline silica for each task; and
(c) A description of the housekeeping measures used to limit employee exposure to respirable crystalline silica.
(2) You must review and evaluate the effectiveness of the written exposure control plan at least annually and update it as necessary.
(3) You must make the written exposure control plan readily available for examination and copying, upon request, to each employee covered by this chapter, their designated representatives, and the director.
(4) In addition to the above written exposure control plan requirements, you must include the following elements for construction work:
(a) A description of the procedures used to restrict access to work areas, when necessary, to minimize the number of employees exposed to respirable crystalline silica and their level of exposure, including exposures generated by other employers or sole proprietors.
(b) A competent person to make frequent and regular inspections of job sites, materials, and equipment to implement the written exposure control plan.
NEW SECTION
WAC 296-840-145 Medical surveillance.
(1) Medical surveillance must be made available at no cost to the employee and at a reasonable time and place for any employee:
(a) Doing construction tasks and required to use a respirator for thirty or more days per year.
(b) Doing work other than construction tasks and will be occupationally exposed to respirable crystalline silica at or above the action level and/or the STEL for thirty or more days per year.
(2) You must ensure that all medical examinations and procedures required by this chapter are performed by a PLHCP as defined in WAC 296-840-095.
(3) Initial examination. You must make available an initial (baseline) medical examination within thirty days after initial assignment, unless the employee has received a medical examination that meets the requirements of this chapter within the last three years. The examination must consist of:
(a) A medical and work history, with emphasis on: Past, present, and anticipated exposure to respirable crystalline silica, dust, and other agents affecting the respiratory system; any history of respiratory system dysfunction, including signs and symptoms of respiratory disease (e.g., shortness of breath, cough, wheezing); smoking status and history; and history of tuberculosis. The history of tuberculosis should include completion of the Washington state department of labor and industries form F252-113-000, Adult Tuberculosis Screening Tool for Workers Exposed to Respirable Crystalline Silica, located in Appendix C;
(b) A physical examination with special emphasis on the respiratory system;
(c) A chest X-ray (a single posteroanterior radiographic projection or radiograph of the chest at full inspiration recorded on either film (no less than 14 x 17 inches and no more than 16 x 17 inches) or digital radiography systems), interpreted and classified according to the International Labour Office (ILO) International Classification of Radiographs of Pneumoconioses by a NIOSH-certified B Reader;
(d) A pulmonary function test to include forced vital capacity (FVC) and forced expiratory volume in one second (FEV1) and FEV1/FVC ratio, administered by a spirometry technician with a current certificate from a NIOSH-approved spirometry course;
(e) Testing for latent tuberculosis infection; and
(f) Any other test deemed appropriate by the PLHCP.
(4) Periodic examinations. You must make available medical examinations that include the procedures described in this section at least every three years or more frequently if recommended by the PLHCP.
(5) Information provided to the PLHCP. You must ensure that the examining PLHCP has a copy of this standard, and must provide the PLHCP with the following information:
(a) A description of the employee's former, current, and anticipated duties as they relate to the employee's occupational exposure to respirable crystalline silica;
(b) The employee's former, current, and anticipated levels of occupational exposure to respirable crystalline silica;
(c) A description of any personal protective equipment used or to be used by the employee, including when and for how long the employee has used or will use that equipment; and
(d) Information from records of employment-related medical examinations previously provided to the employee and currently within the control of the employer.
(6) PLHCP's written medical report for the employee. You must ensure that the PLHCP explains to the employee the results of the medical examination and provides each employee with a written medical report within thirty days of each medical examination performed. The written report must contain:
(a) A statement indicating the results of the medical examination, including any medical condition(s) that would place the employee at increased risk of material impairment to health from exposure to respirable crystalline silica and any medical conditions that require further evaluation or treatment;
(b) Any recommended limitations on the employee's use of respirators;
(c) Any recommended limitations on the employee's exposure to respirable crystalline silica; and
(d) A statement that the employee should be examined by a specialist under subsection (9)(a) of this section if the chest X-ray provided in accordance with this chapter is classified as 1/0 or higher by the B Reader, or if referral to a specialist is otherwise deemed appropriate by the PLHCP.
(7) PLHCP's written medical opinion for employers. You must obtain a written medical opinion from the PLHCP within thirty days of the medical examination. The written opinion must contain only the following:
(a) The date of the examination;
(b) A statement that the examination has met the requirements of this section;
(c) Any recommended limitations on the employee's use of respirators; and
(d) If the employee provides written authorization, the written opinion shall also contain either or both of the following:
(i) Any recommended limitations on the employee's exposure to respirable crystalline silica;
(ii) A statement that the employee should be examined by a specialist under subsection (9)(a) of this section if the chest X-ray provided in accordance with this chapter is classified as 1/0 or higher by the B Reader, or if referral to a specialist is otherwise deemed appropriate by the PLHCP.
(8) You must ensure that each employee receives a copy of the written medical opinion described in subsection (7) of this section within thirty days of each medical examination performed.
(9) Additional examinations.
(a) If the PLHCP's written medical opinion indicates that an employee should be examined by a specialist, you must make available a medical examination by a specialist within thirty days after receiving the PLHCP's written opinion. You must ensure that:
(i) The examining specialist is provided with all of the information that the employer is obligated to provide to the PLHCP in accordance with subsection (5) of this section.
(ii) The specialist explains to the employee the results of the medical examination and provides each employee with a written medical report within thirty days of the examination. The written report shall meet the requirements of subsection (6)(a), (b), and (c) of this section.
(b) You must obtain a written opinion from the specialist within thirty days of the medical examination. The written opinion shall meet the requirements of subsection (7), except (b) and (d)(ii) of this section.
NEW SECTION
WAC 296-840-150 Communication of respirable crystalline silica hazards to employees.
(1) Regarding hazard communication you must:
(a) Include respirable crystalline silica in the program established to comply with chapter 296-901 WAC, Globally harmonized system for hazard communication.
(b) Ensure that each employee has access to labels on containers of crystalline silica and safety data sheets, and is trained in accordance with WAC 296-901-14016 and subsection (3) of this section. The employer shall ensure that at least the following hazards are addressed: Cancer, lung effects, immune system effects, and kidney effects.
(2) Signs. Where a regulated area is established you must post signs at all entrances to the regulated areas that bear the following legend:
DANGER
RESPIRABLE CRYSTALLINE SILICA
MAY CAUSE CANCER
CAUSES DAMAGE TO LUNGS
WEAR RESPIRATORY PROTECTION IN THIS AREA
AUTHORIZED PERSONNEL ONLY
(3) Regarding employee information and training, you must ensure that each employee covered by this chapter can demonstrate knowledge and understanding of at least the following:
(a) The health hazards associated with exposure to respirable crystalline silica;
(b) Specific tasks in the workplace that could result in exposure to respirable crystalline silica;
(c) Specific measures you have implemented to protect employees from exposure to respirable crystalline silica, including engineering controls, work practices, and respirators to be used;
(d) The contents of this chapter;
(e) The purpose and a description of the medical surveillance program required by WAC 296-840-145, and notice that the medical surveillance program under this chapter is not intended to reduce a worker's legal rights under Title 51 RCW;
(f) The identity of the competent person designated by the employer in accordance with WAC 296-840-140 (4)(b).
(4) You must make a copy of this chapter readily available without cost to each employee covered by this chapter.
NEW SECTION
WAC 296-840-155 Recordkeeping.
(1) Air monitoring data.
(a) You must make and maintain an accurate record of all exposure measurements taken to assess employee exposure to respirable crystalline silica, as prescribed in WAC 296-840-105(2). This record must include at least the following information:
(i) The date of measurement for each sample taken;
(ii) The task monitored;
(iii) Sampling and analytical methods used;
(iv) Number, duration, and results of samples taken;
(v) Identity of the laboratory that performed the analysis;
(vi) Type of personal protective equipment, such as respirators, worn by the employees monitored; and
(vii) Name, Social Security number, and job classification of all employees represented by the monitoring, indicating which employees were actually monitored.
(b) You must ensure that exposure records are maintained and made available in accordance with chapter 296-802 WAC, Employee medical and exposure records.
(2) Objective data.
(a) You must make and maintain an accurate record of all objective data relied upon to comply with the requirements of this chapter. This record must include at least the following information:
(i) The crystalline silica-containing material in question;
(ii) The source of the objective data;
(iii) The testing protocol and results of testing;
(iv) A description of the process, task, or activity on which the objective data were based; and
(v) Other data relevant to the process, task, activity, material, or exposures on which the objective data were based.
(b) You must ensure that objective data are maintained and made available in accordance with chapter 296-802 WAC, Employee medical and exposure records.
(3) Medical surveillance.
(a) You must make and maintain an accurate record for each employee covered by medical surveillance under WAC 296-840-145. The record must include the following information about the employee:
(i) Name and Social Security number;
(ii) A copy of the PLHCPs' and specialists' written medical opinions; and
(iii) A copy of the information provided to the PLHCPs and specialists.
(b) You must ensure that medical records are maintained and made available in accordance with chapter 296-802 WAC, Employee medical and exposure records.
NEW SECTION
WAC 296-840-160 Effective dates.
This chapter becomes effective on February 26, 2018. Employers must comply with obligations of this chapter in accordance with the following:
(1) For occupational exposures to respirable crystalline silica in construction work, employers must comply with all obligations of this chapter by October 1, 2018. This includes the sample analysis requirement.
(2) For all occupational exposures to respirable crystalline silica other than construction work, employers must comply with this chapter by July 1, 2019, except as follows:
(a) Where employee exposure to respirable crystalline silica is above the PEL for thirty or more days per year medical surveillance requirements in WAC 296-840-145 must be complied with by October 1, 2018.
(b) Where employee exposure to respirable crystalline silica is at or above the action level or the STEL for thirty or more days per year medical surveillance requirements in WAC 296-840-145 must be complied with by June 23, 2020.
(c) For hydraulic fracturing operations in the oil and gas industry, obligations for engineering controls under WAC 296-840-120(1) begin July 1, 2022.
NEW SECTION
WAC 296-840-165 Appendix A—Methods of sample analysis.
This appendix specifies the procedures for analyzing air samples for respirable crystalline silica, as well as the quality control procedures that employers must ensure that laboratories use when performing an analysis required under WAC 296-840-105(4). Employers must ensure that such a laboratory:
(1) Evaluates all samples using the procedures specified in one of the following analytical methods: OSHA ID-142; NMAM 7500; NMAM 7602; NMAM 7603; MSHA P-2; or MSHA P-7;
(2) Is accredited to ANS/ISO/IEC Standard 17025:2005 with respect to crystalline silica analyses by a body that is compliant with ISO/IEC Standard 17011:2004 for implementation of quality assessment programs;
(3) Uses the most current National Institute of Standards and Technology (NIST) or NIST traceable standards for instrument calibration or instrument calibration verification;
(4) Implements an internal quality control (QC) program that evaluates analytical uncertainty and provides employers with estimates of sampling and analytical error;
(5) Characterizes the sample material by identifying polymorphs of respirable crystalline silica present, identifies the presence of any interfering compounds that might affect the analysis, and makes any corrections necessary in order to obtain accurate sample analysis; and
(6) Analyzes quantitatively for crystalline silica only after confirming that the sample matrix is free of uncorrectable analytical interferences, corrects for analytical interferences, and uses a method that meets the following performance specifications:
(a) Each day that samples are analyzed, performs instrument calibration checks with standards that bracket the sample concentrations;
(b) Uses five or more calibration standard levels to prepare calibration curves and ensures that standards are distributed through the calibration range in a manner that accurately reflects the underlying calibration curve; and
(c) Optimizes methods and instruments to obtain a quantitative limit of detection that represents a value no higher than 25 percent of the PEL based on sample air volume.
AMENDATORY SECTION (Amending WSR 17-18-075, filed 9/5/17, effective 10/6/17)
WAC 296-841-20025 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 web site: 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)) 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) |
7440-41-7 |
((0.002)) 0.0002 mg/m3 |
((0.005)) 0.002 mg/m3 (30 min.) |
0.025 mg/m3 |
—— |
(See WAC 296-62-085) |
|
|
|
|
|
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 (((Chlorobromomthane))) (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 296-155-176) |
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 only 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 only 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 only 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 |
—— |
—— |
|