LABOR AND INDUSTRIES

[Filed August 21, 2018, 11:49 a.m., effective December 12, 2018]

Effective Date of Rule: December 12, 2018.

Purpose: The department added chapter 296-850 WAC, Beryllium, as a new chapter to Title 296 WAC of the department of labor and industries. This responds to Occupational Safety and Health Administration's (OSHA) final rule on beryllium in General Industry C.F.R. 1910.1024, Construction C.F.R. 1926.1124 and Maritime C.F.R. 1915.1024. The department will have one beryllium rule to include all industries listed, instead of separate rules for each industry as OSHA has done. This rule will limit worker exposure to beryllium and beryllium compounds (as Be), which can cause the debilitating lung disease known as chronic beryllium disease (CBD) and lung cancer. This rule mirrors OSHA's final rule, with minor differences in the definitions, medical removal, and medical surveillance sections that allow for implementation of the rule to be consistent with existing requirements in Title 51 RCW. The permission exposure limit (PEL) tables in WAC 296-307-62625 and 296-841-20025 were updated to reflect OSHA's reduced beryllium PELs.

The effective date of this rule is December 12, 2018, and the compliance dates are as follows: All obligations of this standard commence and become enforceable on December 12, 2018, except:


•	Change rooms and showers required by WAC 296-850-145 must be provided by March 11, 2019; and
•	Engineering controls required by WAC 296-850-130 Methods of compliance, must be implemented by March 10, 2020.

WAC 296-841-20025 Permissible exposure limits (PELs).


•	Updated PEL table to reflect OSHA's new PEL requirements for beryllium.

WAC 296-307-62625 Permissible exposure limits of air contaminants.


•	Updated PEL table to reflect OSHA's new PEL requirements for beryllium.

WAC 296-850-090 Definitions.


•	Added definitions for the following: Action level, airborne exposure and airborne exposure to beryllium, beryllium lymphocyte proliferation test (BeLPT), beryllium work area, CBD diagnostic center, CBD, competent person, confirmed positive, construction work, emergency, high-efficiency particulate air (HEPA) filter, objective data, physician or other licensed health care professional (PLHCP), regulated area, ship breaking, ship building, ship repairing.

WAC 296-850-100 Scope and application.


•	Added this section to clarify what is and what is not covered by this rule.

WAC 296-850-110 Permissible exposure limits.


•	Added the requirements for employee exposure limits to beryllium using time-weighted average (TWA), PEL and short-term exposure limit (STEL).

WAC 296-850-115 Exposure assessment.


•	Added the requirement that the employer must assess the airborne exposure of each employee who is or may reasonably be expected to be exposed to airborne beryllium by using either the performance option or the scheduled monitoring option.
•	Added the requirements for the performance option.
•	Added the requirements for the scheduled monitoring option.
•	Added reassessment of exposure requirements.
•	Added methods of sample analysis.
•	Added employee notification of assessment results.
•	Added observation of monitoring.

WAC 296-850-120 Beryllium work areas and regulated areas.


•	Added that the employer must establish and maintain a beryllium work area when required and a regulated area as required by proposed rule.
•	Added requirements for identifying each beryllium work area through signs and other methods.
•	Added requirements to limit access to regulated areas.
•	Added requirements that employees entering regulated areas use respiratory protection and personal protective clothing and equipment.

WAC 296-850-125 Competent person.


•	Added that employer must designate a competent person to regularly inspect construction and maintenance job sites where employees can be expected to be exposed to airborne beryllium above the TWA, PEL or STEL to ensure compliance with this rule.

WAC 296-850-130 Methods of compliance.


•	Added requirements for the following:


−	Written exposure control plan.
−	Engineering and work practice controls.
−	Prohibition of rotation.

WAC 296-850-135 Respiratory protection.


•	Added requirements that the employer must provide respiratory protection at no cost to the employee and ensure it is used as required by this proposed rule.
•	Added requirements that the employer must implement a respiratory protection program as required by this proposed rule.

WAC 296-850-140 Personal protective clothing and equipment.


•	Added requirements for the following:


−	Provision and use of personal protective closing [clothing] and equipment.
−	Removal and storage of beryllium-contaminated personal protective clothing and equipment.
−	Cleaning and replacement of personal protective clothing and equipment.

WAC 296-850-145 Hygiene areas and practices.


•	Added requirements to provide readily accessible washing facilities as required by applicable rules.
•	Added requirements for change rooms and showers.
•	Added requirements for eating and drinking areas that are as free as practicable of beryllium.
•	Added prohibited activities such as not allowing employees to eat or drink in regulated areas where the exposure could be above the TWA, PEL or STEL.

WAC 296-850-150 Housekeeping.


•	Added requirements that the employer must maintain all surfaces in beryllium work areas as free as practicable of beryllium, ensuring all spills are cleaned up promptly.
•	Added requirement for appropriate cleaning methods in beryllium work areas.
•	Added requirements for disposal of materials contaminated with beryllium.

WAC 296-850-155 Medical surveillance.


•	Added requirements for medical surveillance that must be provided at no cost to the employee when there is a possibility of beryllium exposure as identified in the proposed rule.
•	Added requirements for the frequency of medical examinations and the contents of the examination.
•	Added requirements for information that must be provided to PLHCP.
•	Added requirements that the employee receives the licensed physician's written medical report for the employee.
•	Added requirements for the licensed physician's written medical opinion for the employer.
•	Added requirements for a CBD diagnostic center.

WAC 296-850-160 Medical removal.


•	Added requirements for when an employee is eligible for medical removal and what the employer must provide if the employee is eligible for medical removal.

WAC 296-850-165 Communication of hazards


•	Added that employers, chemical manufacturers, importers, and distributors must comply with the globally harmonized system for hazard communication for beryllium.
•	Added requirements for warning signs, posting, sign specification, and warning labels.
•	Added requirement that the employer must provide employees information and training as required in chapter 296-901 WAC, Globally harmonized system for hazard communication.

WAC 296-850-170 Recordkeeping.


•	Added requirements for employer to capture air monitoring data, objective data, medical surveillance, and training records.
•	Added requirements for access to records and transfer of records.

WAC 296-850-175 Dates.


•	Added requirement for the dates this proposed rule becomes effective.

WAC 296-850-180 Appendix A—Control strategies to minimize beryllium exposure of this standard is nonmandatory.


•	Added a nonmandatory Appendix A, Control strategies to minimize beryllium exposure of the standard.
•	Added a table of exposure control recommendations.

WAC 296-850-190 Appendix B—Considerations when using the blood beryllium lymphocyte proliferation test in the screening and evaluation of beryllium sensitization—Nonmandatory.

Citation of Rules Affected by this Order: WAC 296-850-090, 296-850-100, 296-850-110, 296-850-115, 296-850-120, 296-850-125, 296-850-130, 296-850-135, 296-850-140, 296-850-145, 296-850-150, 296-850-155, 296-850-160, 296-850-165, 296-850-170, 296-850-175, 296-850-180 and 296-850-190; and amending WAC 296-841-20025 and 296-307-62625.


•	Added a nonmandatory Appendix B, considerations when using the blood beryllium lymphocyte proliferation test in the screening and evaluation of beryllium sensitization.

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

Other Authority: Chapter 49.17 RCW.

Adopted under notice filed as WSR 18-10-080 on May 1, 2018.

Changes Other than Editing from Proposed to Adopted Version:

WAC 296-850-090 Definitions.


•	Amended definition for beryllium work area to be equivalent to OSHA in response to their direct final rule (DFR) updates effective July 6, 2018. Added language to specify that a work area includes a process or operation that can release beryllium and involves material that contains at least 0.1 percent beryllium by weight.
•	Added a definition for "contaminated with beryllium and beryllium-contaminated" to be equivalent to OSHA in response to their DFR update effective July 6, 2018.
•	Added a definition for "dermal contact with beryllium" to be equivalent to OSHA in response to their DFR update effective July 6, 2018.
•	Amended definition for emergency to be equivalent to OSHA in response to their DFR updates effective July 6, 2018.
•	Added language that gave examples of what could cause an uncontrolled release of airborne beryllium and would create a significant hazard.

WAC 296-850-130 Methods of compliance.


•	Added a requirement [of] what an exposure control plan must contain, specific to construction work, to be at-least-as-effective-as OSHA.
•	Added a requirement for when the exposure control plan must be updated in order to be at-least-as-effective-as OSHA.
•	Added additional language to clarify subsection (2) titled "Engineering and work practice controls" to be equivalent to OSHA in response to their DFR update effective July 6, 2018. A new (a) was added to subsection (2) for this clarification replacing (c) and (d) which were deleted.

WAC 296-850-140 Personal protective clothing and equipment.


•	Added clarification to subsection (3) titled "Cleaning and replacement" to be equivalent to OSHA in response to their DFR update effective July 6, 2018. Specifically clarifying that "beryllium-contaminated" personal protective clothing and equipment cannot be shaken or other means used to remove beryllium that disperses beryllium into the air.

WAC 296-850-145 Hygiene areas and practices.


•	Modified language that clarifies employees who will need to implement hygiene practices to be at-least-as-effective-as OSHA.
•	Added that the employer must also follow the written control exposure plan in construction, ship breaking, ship building or ship repairing to be at-least-as-effective-as OSHA.
•	Reorganized requirement for showers in subsection (3)(a)(ii) for clarity to be equivalent to OSHA in response to their DFR update effective July 6, 2018.
•	Reorganized requirement for showers in subsection (3)(b)(ii) for clarity to be equivalent to OSHA in response to their DFR updated effective July 6, 2018.
•	Added "beryllium-contaminated" to subsection (4)(a) and (b) to clarify that surfaces, clothing, etc., that was beryllium-contaminated must be [as] free as possible of beryllium in eating and drinking areas to be equivalent to OSHA in response to their DFR updated effective July 6, 2018.

WAC 296-850-150 Housekeeping.


•	Added "regulated areas" to be covered in the general housekeeping requirements in subsection (1)(a) to be equivalent to OSHA in response to their DFR updated effective July 6, 2018.
•	Added "regulated areas" to be included in the cleaning methods in subsection (2)(a) and (b) to be equivalent to OSHA in response to their DFR updated effective July 6, 2018.
•	Modified the requirements in subsection (3) to include recycling as well as disposal, adding specificity to the amount of beryllium that would be contained in the materials for appropriate disposal and recycling to be equivalent to OSHA in response to their DFR updated effective July 6, 2018.

WAC 206-850-175 Dates.


•	The effective date of the rule was changed from October 1, 2018, to December 12, 2018.

A final cost-benefit analysis is available by contacting Gail Hughes, department of labor and industries, phone 360-902-6772, fax 360-902-5519, email gail.hughes@lni.wa.gov.

Number of Sections Adopted in Order to Comply with Federal Statute: New 0, Amended 0, Repealed 0; Federal Rules or Standards: New 18, Amended 2, Repealed 0; or Recently Enacted State Statutes: New 0, Amended 0, Repealed 0.

Number of Sections Adopted at the Request of a Nongovernmental Entity: New 0, Amended 0, Repealed 0.

Number of Sections Adopted on the Agency's own Initiative: New 0, Amended 0, Repealed 0.

Number of Sections Adopted in Order to Clarify, Streamline, or Reform Agency Procedures: New 18, Amended 2, Repealed 0.

Number of Sections Adopted using Negotiated Rule Making: New 0, Amended 0, Repealed 0; Pilot Rule Making: New 0, Amended 0, Repealed 0; or Other Alternative Rule Making: New 0, Amended 0, Repealed 0.

Date Adopted: August 21, 2018.

AMENDATORY SECTION(Amending WSR 18-07-098, filed 3/20/18, effective 4/23/18)

WAC 296-307-62625Permissible 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 chapter 296-850 WAC)	7440-41-7	((0.002))0.0002 mg/m3	((0.005))0.002 mg/m3 (((30 min.)))	((0.025 mg/m3)) ——	——
Biphenyl (Diphenyl)	92-52-4	0.2 ppm	0.6 ppm	——	——
Bismuth telluride, undoped	1304-82-1	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Bismuth telluride, Se-doped	——	5 mg/m3	10 mg/m3	——	——
Borates, tetra, sodium salts	——	——	——	——	——
Anhydrous	1330-43-4	1 mg/m3	3 mg/m3	——	——
Decahydrate	1303-96-4	5 mg/m3	10 mg/m3	——	——
Pentahydrate	12179-04-3	1 mg/m3	3 mg/m3	——	——
Boron oxide	1303-86-2	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Boron tribromide	10294-33-4	——	——	1 ppm	——
Boron trifluoride	6737-07-2	——	——	1 ppm	——
Bromacil	314-40-9	1 ppm	3 ppm	——	——
Bromine	7726-95-6	0.1 ppm	0.3 ppm	——	——
Bromine pentafluoride	7789-30-2	0.1 ppm	0.3 ppm	——	——
Bromochloromethane (Chlorobromomethane)	74-97-5	200 ppm	250 ppm	——	——
Bromoform	15-25-2	0.5 ppm	1.5 ppm	——	X
Butadiene (1,3-butadiene)	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 where the exposure limit in chapter 296-840 WAC is not in effect.	14464-46-1	0.05 mg/m3	0.15 mg/m3	——	——
Silica, crystalline quartz	——	——	——	——	——
Respirable fraction Applies where the exposure limit in chapter 296-840 WAC is not in effect.	14808-60-7	0.1 mg/m3	0.3 mg/m3	——	——
Silica, crystalline tripoli (as quartz)	——	——	——	——	——
Respirable fraction	1317-95-9	0.1 mg/m3	0.3 mg/m3	——	——
Silica, crystalline tridymite	——	——	——	——	——
Respirable fraction Applies where the exposure limit in chapter 296-840 WAC is not in effect.	15468-32-3	0.05 mg/m3	0.15 mg/m3	——	——
Silica, fused	——	——	——	——	——
Respirable fraction	60676-86-0	0.1 mg/m3	0.3 mg/m3	——	——
Silicates (less than 1% crystalline silica )	——	——	——	——	——
Mica	——	——	——	——	——
Respirable fraction	12001-26-2	3 mg/m3	6 mg/m3	——	——
Soapstone	——	——	——	——	——
Total particulate	——	6 mg/m3	12 mg/m3	——	——
Respirable fraction	——	3 mg/m3	6 mg/m3	——	——
Talc (containing asbestos)	——	——	——	——	——
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	——	——

AMENDATORY SECTION(Amending WSR 18-07-098, filed 3/20/18, effective 4/23/18)

WAC 296-841-20025Permissible 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 chapter 296-65 WAC)	——	0.1 f/cc	1.0 f/cc (30 minutes)	——	——
n-Amyl acetate	628-63-7	100 ppm	150 ppm	——	——
sec-Amyl acetate	626-38-0	125 ppm	156 ppm	——	——
Aniline and homologues	62-53-3	2 ppm	4 ppm	——	X
Anisidine (o, p-isomers)	29191-52-4	0.1 ppm	0.3 ppm	——	X
Anthophyllite (asbestiform) (as asbestos) (see WAC 296-62-077 and chapter 296-65 WAC)	——	0.1 f/cc	1.0 f/cc (30 minutes)	——	——
Antimony and compounds (as Sb)	7440-36-0	0.5 mg/m3	1.5 mg/m3	——	——
ANTU (alpha Naphthyl thiourea)	86-88-4	0.3 mg/m3	0.9 mg/m3	——	——
Argon	7440-37-1	Simple asphyxiant	——	——	——
Arsenic, organic compounds (as As)	7440-38-2	0.2 mg/m3	0.6 mg/m3	——	——
Arsenic, inorganic compounds (as As) (when use is covered by chapter 296-848 WAC)	7440-38-2	0.01 mg/m3	——	——	——
Arsenic, inorganic compounds (as As) (when use is not covered by chapter 296-848 WAC)	7440-38-2	0.2 mg/m3	0.6 mg/m3	——	——
Arsine	7784-42-1	0.05 ppm	0.15 ppm	——	——
Asbestos (see WAC 296-62-077 and chapter 296-65 WAC)	——	0.1 f/cc	1.0 f/cc (30 minutes)	——	——
Asphalt (Petroleum fumes)	8052-42-4	5 mg/m3	10 mg/m3	——	——
Atrazine	1912-24-9	5 mg/m3	10 mg/m3	——	——
Azinphos methyl (Guthion)	86-50-0	0.2 mg/m3	0.6 mg/m3	——	X
Azodrin (Monocrotophos)	6923-22-4	0.25 mg/m3	0.75 mg/m3	——	——
Barium, soluble compounds (as Ba)	7440-39-3	0.5 mg/m3	1.5 mg/m3	——	——
Barium sulfate	7727-43-7	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Baygon (Propoxur)	114-26-1	0.5 mg/m3	1.5 mg/m3	——	——
Benomyl	17804-35-2	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Benzene (see chapter 296-849 WAC)	71-43-2	1 ppm	5 ppm	——	——
Benzidine (see WAC 296-62-073)	92-87-5	——	——	——	——
p-Benzoquinone (Quinone)	106-51-4	0.1 ppm	0.3 ppm	——	——
Benzo(a) pyrene (Coal tar pitch volatiles)	65996-93-2	0.2 mg/m3	0.6 mg/m3	——	——
Benzoyl peroxide	94-36-0	5 mg/m3	10 mg/m3	——	——
Benzyl chloride	100-44-7	1ppm	3 ppm	——	——
Beryllium and beryllium compounds (as Be) (see chapter 296-850 WAC)	7440-41-7	((0.002))0.0002 mg/m3	((0.005))0.002 mg/m3 (((30 min.)))	((0.025 mg/m3)) ——	——
Biphenyl (Diphenyl)	92-52-4	0.2 ppm	0.6 ppm	——	——
Bismuth telluride, undoped	1304-82-1	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Bismuth telluride, Se-doped	——	5 mg/m3	10 mg/m3	——	——
Borates, tetra, sodium salts	——	——	——	——	——
Anhydrous	1330-43-4	1 mg/m3	3 mg/m3	——	——
Decahydrate	1303-96-4	5 mg/m3	10 mg/m3	——	——
Pentahydrate	12179-04-3	1 mg/m3	3 mg/m3	——	——
Boron oxide	1303-86-2	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Boron tribromide	10294-33-4	——	——	1 ppm	——
Boron trifluoride	6737-07-2	——	——	1 ppm	——
Bromacil	314-40-9	1 ppm	3 ppm	——	——
Bromine	7726-95-6	0.1 ppm	0.3 ppm	——	——
Bromine pentafluoride	7789-30-2	0.1 ppm	0.3 ppm	——	——
Bromochloromethane (Chlorobromomethane)	74-97-5	200 ppm	250 ppm	——	——
Bromoform	15-25-2	0.5 ppm	1.5 ppm	——	X
Butadiene (1,3-butadiene) (see WAC 296-62-07460)	106-99-0	1 ppm	5 ppm	——	——
Butane	106-97-8	800 ppm	1,000 ppm	——	——
Butanethiol (Butyl mercaptan)	109-79-5	0.5 ppm	1.5 ppm	——	——
2-Butanone (Methyl ethyl ketone)	78-93-3	200 ppm	300 ppm	——	——
2-Butoxy ethanol (Butyl cellosolve)	111-76-2	25 ppm	38 ppm	——	X
n-Butyl acetate	123-86-4	150 ppm	200 ppm	——	——
sec-Butyl acetate	105-46-4	200 ppm	250 ppm	——	——
tert-Butyl acetate	540-88-5	200 ppm	250 ppm	——	——
Butyl acrylate	141-32-2	10 ppm	20 ppm	——	——
n-Butyl alcohol	71-36-3	——	——	50 ppm	X
sec-Butyl alcohol	78-92-2	100 ppm	150 ppm	——	——
tert-Butyl alcohol	75-65-0	100 ppm	150 ppm	——	——
Butylamine	109-73-9	——	——	5 ppm	X
Butyl cellosolve (2-Butoxy ethanol)	111-76-2	25 ppm	38 ppm	——	——
tert-Butyl chromate (as Cr) (see WAC 296-62-08003)	1189-85-1	0.005 mg/m3	——	0.1 mg/m3	X
n-Butyl glycidyl ether (BGE)	2426-08-6	25 ppm	38 ppm	——	——
n-Butyl lactate	138-22-7	5 ppm	10 ppm	—-	——
Butyl mercaptan	109-79-5	0.5 ppm	1.5 ppm	——	——
o-sec-Butylphenol	89-72-5	5 ppm	10 ppm	——	X
p-tert-Butyl-toluene	98-51-1	10 ppm	20 ppm	——	——
Cadmium oxide fume (as Cd) (see WAC 296-62-074 and 296-155-174)	1306-19-0	0.005 mg/m3	——	——	——
Cadmium dust and salts (as Cd) (see WAC 296-62-074 and 296-155-174)	7440-43-9	0.005 mg/m3	——	——	——
Calcium arsenate (see chapter 296-848 WAC)	——	0.01 mg/m3	——	——	——
Calcium carbonate	1317-65-3	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Calcium cyanamide	156-62-7	0.5 mg/m3	1.5 mg/m3	——	——
Calcium hydroxide	1305-62-0	5 mg/m3	10 mg/m3	——	——
Calcium oxide	1305-78-8	2 mg/m3	4 mg/m3	——	——
Calcium silicate	1344-95-2	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Calcium sulfate	7778-18-9	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Camphor (synthetic)	76-22-2	2 mg/m3	4 mg/m3	——	——
Caprolactam	105-60-2	——	——	——	——
Dust	——	1 mg/m3	3 mg/m3	——	——
Vapor	——	5 ppm	10 ppm	——	——
Captafol (Difolatan)	2425-06-1	0.1 mg/m3	0.3 mg/m3	——	X
Captan	133-06-2	5 mg/m3	10 mg/m3	——	——
Carbaryl (Sevin)	63-25-2	5 mg/m3	10 mg/m3	——	——
Carbofuran (Furadon)	1563-66-2	0.1 mg/m3	0.3 mg/m3	——	——
Carbon black	1333-86-4	3.5 mg/m3	7 mg/m3	——	——
Carbon dioxide	124-38-9	5,000 ppm	30,000 ppm	——	——
Carbon disulfide	75-15-0	4 ppm	12 ppm	——	X
Carbon monoxide	630-08-0	35 ppm	200 ppm (5 min.)	1,500 ppm	——
Carbon tetrabromide	558-13-4	0.1 ppm	0.3 ppm	——	——
Carbon tetrachloride (Tetrachloromethane)	56-23-5	2 ppm	4 ppm	——	X
Carbonyl chloride (Phosgene)	7803-51-2	0.1 ppm	0.3 ppm	——	——
Carbonyl fluoride	353-50-4	2 ppm	5 ppm	——	——
Catechol (Pyrocatechol)	120-80-9	5 ppm	10 ppm	——	X
Cellosolve acetate (2-Ethoxyethylacetate)	111-15-9	5 ppm	10 ppm	——	X
Cellulose (paper fiber)	9004-34-6	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Cesium hydroxide	21351-79-1	2 mg/m3	4 mg/m3	——	——
Chlordane	57-74-9	0.5 mg/m3	1.5 mg/m3	——	X
Chlorinated camphene (Toxaphen)	8001-35-2	0.5 mg/m3	1 mg/m3	——	X
Chlorinated diphenyl oxide	55720-99-5	0.5 mg/m3	1.5 mg/m3	——	——
Chlorine	7782-50-5	0.5 ppm	——	1 ppm	——
Chlorine dioxide	10049-04-4	0.1 ppm	0.3 ppm	——	——
Chlorine trifluoride	7790-91-2	——	——	0.1 ppm	——
Chloroacetaldehyde	107-20-0	——	——	1 ppm	——
a-Chloroacetophenone (Phenacyl chloride)	532-21-4	0.05 ppm	0.15 ppm	——	——
Chloroacetyl chloride	79-04-9	0.05 ppm	0.15 ppm	——	——
Chlorobenzene (Monochlorobenzene)	108-90-7	75 ppm	113 ppm	——	——
o-Chlorobenzylidene malononitrile (OCBM)	2698-41-1	——	——	0.05 ppm	X
Chlorobromomethane	74-97-5	200 ppm	250 ppm	——	——
2-Chloro-1, 3-butadiene (beta-Chloroprene)	126-99-8	10 ppm	20 ppm	——	X
Chlorodifluoromethane	75-45-6	1,000 ppm	1,250 ppm	——	——
Chlorodiphenyl (42% Chlorine) (PCB) (Polychlorobiphenyls)	53469-21-9	1 mg/m3	3 mg/m3	——	X
Chlorodiphenyl (54% Chlorine) (Polychlorobiphenyls (PCB))	11097-69-1	0.5 mg/m3	1.5 mg/m3	——	X
1-Chloro-2, 3-epoxypropane (Epichlorhydrin)	106-89-8	2 ppm	4 ppm	——	X
2-Chloroethanol (Ethylene chlorohydrin)	107-07-3	——	——	1 ppm	X
Chloroethylene (vinyl chloride) (see WAC 296-62-07329)	75-01-4	1 ppm	5 ppm	——	——
Chloroform (Trichloromethane)	67-66-3	2 ppm	4 ppm	——	——
1-Chloro-1-nitropropane	600-25-9	2 ppm	4 ppm	——	——
bis-Chloromethyl ether (see WAC 296-62-073)	542-88-1	——	——	——	——
Chloromethyl methyl ether (Methyl chloromethyl ether) (see WAC 296-62-073)	107-30-2	——	——	——	——
Chloropentafluoroethane	76-15-3	1,000 ppm	1,250 ppm	——	——
Chloropicrin (Nitrotrichloromethane)	76-06-2	0.1 ppm	0.3 ppm	——	——
beta-Chloroprene (2-Chloro-1, 3-butadiene)	126-99-8	10 ppm	20 ppm	——	X
o-Chlorostyrene	2039-87-4	50 ppm	75 ppm	——	——
o-Chlorotoluene	95-49-8	50 ppm	75 ppm	——	——
2-Chloro-6-trichloromethyl pyridine (Nitrapyrin)	1929-82-4	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Chlorpyrifos	2921-88-2	0.2 mg/m3	0.6 mg/m3	——	X
Chromic acid and chromates (as Cr) (when the compound is not covered by WAC 296-62-08003)	Varies with compound	——	——	0.1 mg/m3	——
Chromium	——	——	——	——	——
Chromium (VI) compounds (as Cr) (when the compound is covered by WAC 296-62-08003)	——	0.005 mg/m3	——	——	——
Chromium metal or Chromium (II) compounds Or Chromium (III) compounds	7440-47-3	0.5 mg/m3	——	——	——
Chromyl chloride (as Cr) (see WAC 296-62-08003)	14977-61-8	0.005 mg/m3	——	——	——
Chrysene (Coal tar pitch volatiles)	65996-93-2	0.2 mg/m3	0.6 mg/m3	——	——
Chrysotile (as asbestos) (see WAC 296-62-077 and chapter 296-65 WAC)	——	0.1 f/cc	1.0 f/cc (30 minutes)	——	——
Clopidol	2971-90-6	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Coal dust (less than 5% SiO2)	——	——	——	——	——
Respirable fraction	——	2 mg/m3	4 mg/m3	——	——
Coal dust (greater than or equal to 5% SiO2)	——	——	——	——	——
Respirable fraction	——	0.1 mg/m3	0.3 mg/m3	——	——
Coal tar pitch volatiles (benzene soluble fraction) Acridine Anthracene Benzo (a) pyrene Chrysene Phenanthrene Pyrene	65996-93-2	0.2 mg/m3	0.6 mg/m3	——	——
Cobalt, metal fume & dust (as Co)	7440-48-4	0.05 mg/m3	0.15 mg/m3	——	——
Cobalt carbonyl (as Co)	10210-68-1	0.1 mg/m3	0.3 mg/m3	——	——
Cobalt hydrocarbonyl (as Co)	16842-03-8	0.1 mg/m3	0.3 mg/m3	——	——
Coke oven emissions (see WAC 296-62-200)	——	0.15 mg/m3	——	——	——
Copper (as Cu)	7440-50-8	——	——	——	——
Fume	——	0.1 mg/m3	0.3 mg/m3	——	——
Dusts and mists	——	1 mg/m3	3 mg/m3	——	——
Cotton dust (raw) (waste sorting, blending, cleaning, willowing and garetting) (see WAC 296-62-14533)	——	1 mg/m3	——	——	——
Corundum (Aluminum oxide)	7429-90-5	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Crag herbicide (Sesone, Sodium-2, 4-dichloro-phenoxyethyl sulfate)	136-78-7	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Cresol (all isomers)	1319-77-3	5 ppm	10 ppm	——	X
Crocidolite (as asbestos) (see WAC 296-62-077 and chapter 296-65 WAC)	——	0.1 f/cc	1.0 f/cc (30 minutes)	——	——
Crotonaldehyde	123-73-9; 4170-30-3	2 ppm	4 ppm	——	——
Crufomate	299-86-5	5 mg/m3	10 mg/m3	——	——
Cumene	98-82-8	50 ppm	75 ppm	——	X
Cyanamide	420-04-2	2 mg/m3	4 mg/m3	——	——
Cyanide (as CN)	Varies with compound	5 mg/m3	10 mg/m3	——	X
Cyanogen	460-19-5	10 ppm	20 ppm	——	——
Cyanogen chloride	506-77-4	——	——	0.3 ppm	——
Cyclohexane	110-82-7	300 ppm	375 ppm	——	——
Cyclohexanol	108-93-0	50 ppm	75 ppm	——	X
Cyclohexanone	108-94-1	25 ppm	38 ppm	——	X
Cyclohexene	110-83-8	300 ppm	375 ppm	——	——
Cyclohexylamine	108-91-8	10 ppm	20 ppm	——	——
Cyclonite (RDX)	121-82-4	1.5 mg/m3	3.0 mg/m3	——	X
Cyclopentadiene	542-92-7	75 ppm	113 ppm	——	——
Cyclopentane	287-92-3	600 ppm	750 ppm	——	——
Cyhexatin (Tricyclohexyltin hydroxide)	13121-70-5	5 mg/m3	10 mg/m3	——	——
2,4-D (Dichlorophenoxy- acetic acid)	94-75-7	10 mg/m3	20 mg/m3	——	——
DBCP (1,2-Dibromo-3- chloropropane) (see WAC 296-62-07342)	96-12-8	0.001 ppm	——	0.005 ppm	——
DDT (Dichlorodiphenyltri- chloroethane)	50-29-3	1 mg/m3	3 mg/m3	——	X
DDVP, (Dichlorvos)	62-73-7	0.1 ppm	0.3 ppm	——	X
Dasanit (Fensulfothion)	115-90-2	0.1 mg/m3	0.3 mg/m3	——	——
Decaborane	17702-41-9	0.05 ppm	0.15 ppm	——	X
Demeton	8065-48-3	0.01 ppm	0.03 ppm	——	X
Diacetone alcohol (4-hydroxy-4-methyl- 2-pentanone)	123-42-2	50 ppm	75 ppm	——	——
1, 2-Diaminoethane (Ethylenediamine)	107-15-3	10 ppm	20 ppm	——	——
Diazinon	333-41-5	0.1 mg/m3	0.3 mg/m3	——	X
Diazomethane	334-88-3	0.2 ppm	0.6 ppm	——	——
Diborane	19287-45-7	0.1 ppm	0.3 ppm	——	——
Dibrom (see Naled)	300-76-5	3 mg/m3	6 mg/m3	——	X
1, 2-Dibromo-3-chloropropane (DBCP) (see WAC 296-62-07342)	96-12-8	0.001 ppm	——	0.005 ppm	——
2-N-Dibutylamino ethanol	102-81-8	2 ppm	4 ppm	——	X
Dibutyl phosphate	107-66-4	1 ppm	2 ppm	——	——
Dibutyl phthalate	84-74-2	5 mg/m3	10 mg/m3	——	——
Dichloroacetylene	7572-29-4	——	——-	0.1 ppm	——
o-Dichlorobenzene	95-50-1	——	——	50 ppm	——
p-Dichlorobenzene	106-46-7	75 ppm	110 ppm	——	——
3, 3'-Dichlorobenzidine (see WAC 296-62-073)	91-94-1	——	——	——	——
Dichlorodiphenyltri- chloroethane (DDT)	50-29-3	1 mg/m3	3 mg/m3	——	X
Dichlorodifluoromethane	75-71-8	1,000 ppm	1,250 ppm	——	——
1, 3-Dichloro-5, 5-dimethyl hydantoin	118-52-5	0.2 mg/m3	0.4 mg/m3	——	——
1, 1-Dichloroethane (Ethylidine chloride)	75-34-3	100 ppm	150 ppm	——	——
1, 2-Dichloroethane (Ethylene dichloride)	107-06-2	1 ppm	2 ppm	——	——
1, 1-Dichloroethylene (Vinylidene chloride)	75-35-4	1 ppm	3 ppm	——	——
1, 2-Dichloroethylene (Acetylene dichloride)	540-59-0	200 ppm	250 ppm	——	——
Dichloroethyl ether	111-44-4	5 ppm	10 ppm	——	X
Dichlorofluoromethane	75-43-4	10 ppm	20 ppm	——	——
Dichloromethane (Methylene chloride) (see chapter 296-859 WAC)	75-09-2	25 ppm	125 ppm	——	——
1, 1-Dichloro-1-nitroethane	594-72-9	2 ppm	10 ppm	——	——
Dichlorophenoxyacetic acid (2, 4-D)	94-75-7	10 mg/m3	20 mg/m3	——	——
1, 2-Dichloropropane (Propylene dichloride)	78-87-5	75 ppm	110 ppm	——	——
Dichloropropene	542-75-6	1 ppm	3 ppm	——	X
2, 2-Dichloropropionic acid	75-99-0	1 ppm	3 ppm	——	——
Dichlorotetrafluoroethane	76-14-2	1,000 ppm	1,250 ppm	——	——
Dichlorvos (DDVP)	62-73-7	0.1 ppm	0.3 ppm	——	X
Dicrotophos	141-66-2	0.25 mg/m3	0.75 mg/m3	——	X
Dicyclopentadiene	77-73-6	5 ppm	10 ppm	——	——
Dicyclopentadienyl iron	102-54-5	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Dieldrin	60-57-1	0.25 mg/m3	0.75 mg/m3	——	X
Diethanolamine	111-42-2	3 ppm	6 ppm	——	——
Diethylamine	109-89-7	10 ppm	25 ppm	——	——
2-Diethylaminoethanol	100-37-8	10 ppm	20 ppm	——	X
Diethylene triamine	111-40-0	1 ppm	3 ppm	——	X
Diethyl ether (Ethyl ether)	60-29-7	400 ppm	500 ppm	——	——
Diethyl ketone	96-22-0	200 ppm	250 ppm	——	——
Diethyl phthalate	84-66-2	5 mg/m3	10 mg/m3	——	——
Difluorodibromomethane	75-61-6	100 ppm	150 ppm	——	——
Difolatan (Captafol)	2425-06-1	0.1 mg/m3	0.3 mg/m3	——	X
Diglycidyl ether (DGE)	2238-07-5	0.1 ppm	0.3 ppm	——	——
Dihydroxybenzene (Hydroquinone)	123-31-9	2 mg/m3	4 mg/m3	——	——
Diisobutyl ketone (2, 6- Dimethylheptanone)	108-83-8	25 ppm	38 ppm	——	——
Diisopropylamine	108-18-9	5 ppm	10 ppm	——	X
Dimethoxymethane (Methylal)	109-87-5	1,000 ppm	1,250 ppm	——	——
Dimethyl acetamide	127-19-5	10 ppm	20 ppm	——	X
Dimethylamine	124-40-3	10 ppm	20 ppm	——	——
4-Dimethylaminoazo benzene (see WAC 296-62-073)	60-11-7	——	——	——	——
Dimethylaminobenzene (Xylidene)	1300-73-8	2 ppm	4 ppm	——	X
Dimethylaniline (N, N-Dimethylaniline)	121-69-7	5 ppm	10 ppm	——	X
Dimethylbenzene (Xylene)	1300-73-8	100 ppm	150 ppm	——	——
Dimethyl-1, 2-dibromo-2, 2-dichloroethyl phosphate (Naled)	300-76-5	3 mg/m3	6 mg/m3	——	X
Dimethylformamide	68-12-2	10 ppm	20 ppm	——	X
2, 6-Dimethylheptanone (Diisobutyl ketone)	108-83-8	25 ppm	38 ppm	——	——
1, 1-Dimethylhydrazine	57-14-7	0.5 ppm	1.5 ppm	——	X
Dimethyl phthalate	131-11-3	5 mg/m3	10 mg/m3	——	——
Dimethyl sulfate	77-78-1	0.1 ppm	0.3 ppm	——	X
Dinitolmide (3, 5-Dinitro-o-toluamide)	148-01-6	5 mg/m3	10 mg/m3	——	——
Dinitrobenzene (all isomers - alpha, meta and para)	528-29-0; 99-65-0; 100-25-4	0.15 ppm	0.45 ppm	——	X
Dinitro-o-cresol	534-52-1	0.2 mg/m3	0.6 mg/m3	——	X
3, 5-Dinitro-o-toluamide (Dinitolmide)	148-01-6	5 mg/m3	10 mg/m3	——	——
Dinitrotoluene	25321-14-6	1.5 mg/m3	3 mg/m3	——	X
Dioxane (Diethylene dioxide)	123-91-1	25 ppm	38 ppm	——	X
Dioxathion	78-34-2	0.2 mg/m3	0.6 mg/m3	——	X
Diphenyl (Biphenyl)	92-52-4	0.2 ppm	0.6 ppm	——	——
Diphenylamine	122-39-4	10 mg/m3	20 mg/m3	——	——
Diphenylmethane diisocyanate (Methylene bisphenyl isocyanate (MDI))	101-68-8	——	——	0.02 ppm	——
Dipropylene glycol methyl ether	34590-94-8	100 ppm	150 ppm	——	X
Dipropyl ketone	123-19-3	50 ppm	75 ppm	——	——
Diquat	85-00-7	0.5 mg/m3	1.5 mg/m3	——	——
Di-sec, Octyl phthalate (Di-2-ethylhexylphthalate)	117-81-7	5 mg/m3	10 mg/m3	——	——
Disulfram	97-77-8	2 mg/m3	4 mg/m3	——	——
Disulfoton	298-04-4	0.1 mg/m3	0.3 mg/m3	——	X
2, 6-Di-tert-butyl-p-cresol	128-37-0	10 mg/m3	20 mg/m3	——	——
Diuron	330-54-1	10 mg/m3	20 mg/m3	——	——
Divinyl benzene	1321-74-0	10 ppm	20 ppm	——	——
Emery	12415-34-8	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Endosulfan (Thiodan)	115-29-7	0.1 mg/m3	0.3 mg/m3	——	X
Endrin	72-20-8	0.1 mg/m3	0.3 mg/m3	——	X
Epichlorhydrin (1-Chloro-2, 3-epoxypropane)	106-89-8	2 ppm	4 ppm	——	X
EPN	2104-64-5	0.5 mg/m3	1.5 mg/m3	——	X
1, 2-Epoxypropane (Propylene oxide)	75-56-9	20 ppm	30 ppm	——	——
2, 3-Epoxy-1-propanol (Glycidol)	556-52-5	25 ppm	38 ppm	——	——
Ethane	——	Simple asphyxiant	——	——	——
Ethanethiol (Ethyl mercaptan)	75-08-1	0.5 ppm	1.5 ppm	——	——
Ethanol (Ethyl alcohol)	64-17-5	1,000 ppm	1,250 ppm	——	——
Ethanolamine (2-Aminoethanol)	141-43-5	3 ppm	6 ppm	——	——
Ethion	563-12-2	0.4 mg/m3	1.2 mg/m3	——	X
2-Ethoxyethanol (Glycol monoethyl ether)	110-80-5	5 ppm	10 ppm	——	X
2-Ethoxyethyl acetate (Cellosolve acetate)	111-15-9	5 ppm	10 ppm	——	X
Ethyl acetate	141-78-6	400 ppm	500 ppm	——	——
Ethyl acrylate	140-88-5	5 ppm	25 ppm	——	X
Ethyl alcohol (ethanol)	64-17-5	1,000 ppm	1,250 ppm	——	——
Ethylamine	75-04-07	10 ppm	20 ppm	——	——
Ethyl amyl ketone (5-Methyl-3-hepatone)	541-85-5	25 ppm	38 ppm	——	——
Ethyl benzene	100-41-4	100 ppm	125 ppm	——	——
Ethyl bromide	74-96-4	200 ppm	250 ppm	——	——
Ethyl butyl ketone (3-Heptanone)	106-35-4	50 ppm	75 ppm	——	——
Ethyl chloride	75-00-3	1,000 ppm	1,250 ppm	——	——
Ethylene	74-85-1	Simple asphyxiant	——	——	——
Ethylene chlorohydrin (2-Chloroethanol)	107-07-3	——	——	1 ppm	X
Ethylenediamine (1,2- Diaminoethane)	107-15-3	10 ppm	20 ppm	——	X
Ethylene dibromide	106-93-4	0.1 ppm	0.5 ppm	——	——
Ethylene dichloride (1,2-Dichloroethane)	107-06-2	1 ppm	2 ppm	——	——
Ethylene glycol	107-21-1	——	——	50 ppm	——
Ethylene glycol dinitrate	628-96-6	——	0.1 mg/m3	——	X
Ethylene glycol monomethyl ether acetate (Methyl cellosolve acetate)	——	5 ppm	10 ppm	——	X
Ethyleneimine (see WAC 296-62-073)	151-56-4	——	——	——	X
Ethylene oxide (see chapter 296-855 WAC)	75-21-8	1 ppm	5 ppm	——	——
Ethyl ether (Diethyl ether)	60-29-7	400 ppm	500 ppm	——	——
Ethyl formate	109-94-4	100 ppm	125 ppm	——	——
Ethylidine chloride (1, 1-Dichloroethane)	107-06-2	1 ppm	2 ppm	——	——
Ethylidene norbornene	16219-75-3	——	——	5.0 ppm	——
Ethyl mercaptan (Ethanethiol)	75-08-1	0.5 ppm	1.5 ppm	——	——
n-Ethylmorpholine	100-74-3	5 ppm	10 ppm	——	X
Ethyl sec-amyl ketone (5-methyl-3-heptanone)	541-85-5	25 ppm	38 ppm	——	——
Ethyl silicate	78-10-4	10 ppm	20 ppm	——	——
Fenamiphos	22224-92-6	0.1 mg/m3	0.3 mg/m3	——	X
Fensulfothion (Dasanit)	115-90-2	0.1 mg/m3	0.3 mg/m3	——	——
Fenthion	55-38-9	0.2 mg/m3	0.6 mg/m3	——	X
Ferbam	——	——	——	——	——
Total particulate	14484-64-1	10 mg/m3	20 mg/m3	——	——
Ferrovanadium dust	12604-58-9	1 mg/m3	3 mg/m3	——	——
Fluorides (as F)	Varies with compound	2.5 mg/m3	5 mg/m3	——	——
Fluorine	7782-41-4	0.1 ppm	0.3 ppm	——	——
Fluorotrichloromethane (see Trichlorofluoro methane)	75-69-4	——	——	1,000 ppm	——
Fonofos	944-22-9	0.1 mg/m3	0.3 mg/m3	——	X
Formaldehyde (see chapter 296-856 WAC)	50-00-0	0.75 ppm	2 ppm	——	——
Formamide	75-12-7	20 ppm	30 ppm	——	——
Formic acid	64-18-6	5 ppm	10 ppm	——	——
Furadon (carbofuran)	1563-66-2	0.1 mg/m3	0.3 mg/m3	——	——
Furfural	98-01-1	2 ppm	4 ppm	——	X
Furfuryl alcohol	98-00-0	10 ppm	15 ppm	——	X
Gasoline	8006-61-9	300 ppm	500 ppm	——	——
Germanium tetrahydride	7782-65-2	0.2 ppm	0.6 ppm	——	——
Glass, fibrous or dust	——	10 mg/m3	20 mg/m3	——	——
Glutaraldehyde	111-30-8	——	——	0.2 ppm	——
Glycerin mist	56-81-5	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Glycidol (2, 3-Epoxy-1-propanol)	556-52-5	25 ppm	38 ppm	——	——
Glycol monoethyl ether (2-Ethoxyethanol)	110-80-5	5 ppm	10 ppm	——	X
Grain dust (oat, wheat, barley)	——	10 mg/m3	20 mg/m3	——	——
Graphite, natural	7782-42-5	——	——	——	——
Respirable particulate	——	2.5 mg/m3	5 mg/m3	——	——
Graphite, synthetic	——	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Guthion (Azinphosmethyl)	86-50-0	0.2 mg/m3	0.6 mg/m3	——	X
Gypsum	13397-24-5	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Hafnium	7440-58-6	0.5 mg/m3	1.5 mg/m3	——	——
Helium	——	Simple asphyxiant	——	——	——
Heptachlor	76-44-8	0.5 mg/m3	1.5 mg/m3	——	X
Heptane (n-heptane)	142-82-5	400 ppm	500 ppm	——	——
2-Heptanone (Methyl n-amyl ketone)	110-43-0	50 ppm	75 ppm	——	——
3-Heptanone (Ethyl butyl ketone)	106-35-4	50 ppm	75 ppm	——	——
Hexachlorobutadiene	87-68-3	0.02 ppm	0.06 ppm	——	X
Hexachlorocyclopentadiene	77-47-4	0.01 ppm	0.03 ppm	——	——
Hexachloroethane	67-72-1	1 ppm	3 ppm	——	X
Hexachloronaphthalene	1335-87-1	0.2 mg/m3	0.6 mg/m3	——	X
Hexafluoroacetone	684-16-2	0.1 ppm	0.3 ppm	——	X
Hexane	——	——	——	——	——
n-hexane	110-54-3	50 ppm	75 ppm	——	——
other isomers	Varies with compound	500 ppm	1,000 ppm	——	——
2-Hexanone (Methyl-n-butyl ketone)	591-78-6	5 ppm	10 ppm	——	——
Hexone (Methyl isobutyl ketone)	108-10-1	50 ppm	75 ppm	——	——
sec-Hexyl acetate	108-84-9	50 ppm	75 ppm	——	——
Hexylene glycol	107-41-5	——	——	25 ppm	——
Hydrazine	302-01-2	0.1 ppm	0.3 ppm	——	X
Hydrogen	——	Simple asphyxiant	——	——	——
Hydrogenated terphenyls	61788-32-7	0.5 ppm	1.5 ppm	——	——
Hydrogen bromide	10035-10-6	——	——	3.0 ppm	——
Hydrogen chloride	7647-01-0	——	——	5.0 ppm	——
Hydrogen cyanide	74-90-8	——	4.7 ppm	——	X
Hydrogen fluoride	7664-39-3	——	——	3 ppm	——
Hydrogen peroxide	7722-84-1	1 ppm	3 ppm	——	——
Hydrogen selenide (as Se)	7783-07-5	0.05 ppm	0.15 ppm	——	——
Hydrogen sulfide	7783-06-4	10 ppm	15 ppm	——	——
Hydroquinone (Dihydroxybenzene)	123-31-9	2 mg/m3	4 mg/m3	——	——
4-Hydroxy-4-methyl-2-pentanone (Diacetone alcohol)	123-42-2	50 ppm	75 ppm	——	——
2-Hydroxypropyl acrylate	99-61-1	0.5 ppm	1.5 ppm	——	X
Indene	95-13-6	10 ppm	20 ppm	——	——
Indium and compounds (as In)	7440-74-6	0.1 mg/m3	0.3 mg/m3	——	——
Iodine	7553-56-2	——	——	0.1 ppm	——
Iodoform	75-47-8	0.6 ppm	1.8 ppm	——	——
Iron oxide dust and fume (as Fe)	1309-37-1	——	——	——	——
Total particulate	——	5 mg/m3	10 mg/m3	——	——
Iron pentacarbonyl (as Fe)	13463-40-6	0.1 ppm	0.2 ppm	——	——
Iron salts, soluble (as Fe)	Varies with compound	1 mg/m3	3 mg/m3	——	——
Isoamyl acetate	123-92-2	100 ppm	150 ppm	——	——
Isoamyl alcohol (primary and secondary)	123-51-3	100 ppm	125 ppm	——	——
Isobutyl acetate	110-19-0	150 ppm	188 ppm	——	——
Isobutyl alcohol	78-83-1	50 ppm	75 ppm	——	——
Isooctyl alcohol	26952-21-6	50 ppm	75 ppm	——	X
Isophorone	78-59-1	4 ppm	——	5 ppm	——
Isophorone diisocyanate	4098-71-9	0.005 ppm	0.02 ppm	——	X
Isopropoxyethanol	109-59-1	25 ppm	38 ppm	——	——
Isopropyl acetate	108-21-4	250 ppm	310 ppm	——	——
Isopropyl alcohol	67-63-0	400 ppm	500 ppm	——	——
Isopropylamine	75-31-0	5 ppm	10 ppm	——	——
N-Isopropylaniline	768-52-5	2 ppm	4 ppm	——	X
Isopropyl ether	108-20-3	250 ppm	313 ppm	——	——
Isopropyl glycidyl ether (IGE)	4016-14-2	50 ppm	75 ppm	——-	——
Kaolin	——	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Ketene	463-51-4	0.5 mg/m3	1.5 mg/m3	——	——
Lannate (Methomyl)	16752-77-5	2.5 mg/m3	5 mg/m3	——	——
Lead, inorganic (as Pb) (see WAC 296-62-07521 and 296-155-176)	7439-92-1	0.05 mg/m3	——	——	——
Lead arsenate (as Pb) (see WAC 296-62-07521, 296-155-176, and chapter 296-848 WAC)	3687-31-8	0.05 mg/m3	——	——	——
Lead chromate (as Pb) (see WAC 296-62-08003, 296-62-07521, and 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 where the exposure limit in chapter 296-840 WAC is not in effect.	14464-46-1	0.05 mg/m3	0.15 mg/m3	——	——
Silica, crystalline quartz	——	——	——	——	——
Respirable fraction Applies where the exposure limit in chapter 296-840 WAC is not in effect.	14808-60-7	0.1 mg/m3	0.3 mg/m3	——	——
Silica, crystalline tripoli (as quartz)	——	——	——	——	——
Respirable fraction	1317-95-9	0.1 mg/m3	0.3 mg/m3	——	——
Silica, crystalline tridymite	——	——	——	——	——
Respirable fraction Applies where the exposure limit in chapter 296-840 WAC is not in effect.	15468-32-3	0.05 mg/m3	0.15 mg/m3	——	——
Silica, fused	——	——	——	——	——
Respirable fraction	60676-86-0	0.1 mg/m3	0.3 mg/m3	——	——
Silicates (less than 1% crystalline silica)	——	——	——	——	——
Mica	——	——	——	——	——
Respirable fraction	12001-26-2	3 mg/m3	6 mg/m3	——	——
Soapstone	——	——	——	——	——
Total particulate	——	6 mg/m3	12 mg/m3	——	——
Respirable fraction	——	3 mg/m3	6 mg/m3	——	——
Talc (containing asbestos) (as asbestos) (see WAC 296-62-07705 and chapter 296-65 WAC)	——	0.1 f/cc	1.0 f/cc (30 minutes)	——	——
Talc (containing no asbestos)	——	——	——	——	——
Respirable fraction	14807-96-6	2 mg/m3	4 mg/m3	——	——
Tremolite (asbestiform) (as asbestos) (see WAC 296-62-07705 and chapter 296-65 WAC)	——	0.1 f/cc	1.0 f/cc (30 minutes)	——	——
Silicon	7440-21-3	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Silicon carbide	409-21-2	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Silicon tetrahydride (Silane)	7803-62-5	5 ppm	10 ppm	——	——
Silver, metal dust and soluble compounds (as Ag)	7440-22-4	0.01 mg/m3	0.03 mg/m3	——	——
Soapstone	——	——	——	——	——
Total particulate	——	6 mg/m3	12 mg/m3	——	——
Respirable fraction	——	3 mg/m3	6 mg/m3	——	——
Sodium azide (as HN3 or NaN3)	26628-22-8	——	——	0.1 ppm	X
Sodium bisulfite	7631-90-5	5 mg/m3	10 mg/m3	——	——
Sodium-2, 4-dichloro-phenoxyethyl sulfate (Crag herbicide)	136-78-7	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Sodium fluoroacetate	62-74-8	0.05 mg/m3	0.15 mg/m3	——	X
Sodium hydroxide	1310-73-2	——	——	2 mg/m3	——
Sodium metabisulfite	7681-57-4	5 mg/m3	10 mg/m3	——	——
Starch	9005-25-8	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Stibine	7803-52-3	0.1 ppm	0.3 ppm	——	——
Stoddard solvent	8052-41-3	100 ppm	150 ppm	——	——
Strychnine	57-24-9	0.15 mg/m3	0.45 mg/m3	——	——
Styrene (Phenylethylene, Vinyl benzene)	100-42-5	50 ppm	100 ppm	——	——
Subtilisins	9014-01-1	——	0.00006 mg/m3	——	——
			(60 min.)
Sucrose	57-50-1	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Sulfotep (TEDP)	3689-24-5	0.2 mg/m3	0.6 mg/m3	——	X
Sulfur dioxide	7446-09-5	2 ppm	5 ppm	——	——
Sulfur hexafluoride	2551-62-4	1,000 ppm	1,250 ppm	——	——
Sulfuric acid	7664-93-9	1 mg/m3	3 mg/m3	——	——
Sulfur monochloride	10025-67-9	——	——	1 ppm	——
Sulfur pentafluoride	5714-22-1	——	——	0.01 ppm	——
Sulfur tetrafluoride	7783-60-0	——	——	0.1 ppm	——
Sulfuryl fluoride	2699-79-8	5 ppm	10 ppm	——	——
Sulprofos	35400-43-2	1 mg/m3	3 mg/m3	——	——
Systox (Demeton)	8065-48-3	0.01 ppm	0.03 ppm	——	X
2, 4, 5-T (2, 4, 5- tri- chlorophenoxyacetic acid)	93-76-5	10 mg/m3	20 mg/m3	——	——
Talc (containing asbestos) (as asbestos) (see WAC 296-62-07705 and chapter 296-65 WAC)	——	0.1 f/cc	1.0 f/cc (30 minutes)	——	——
Talc (containing no asbestos)	——	——	——	——	——
Respirable fraction	14807-96-6	2 mg/m3	4 mg/m3	——	——
Tantalum	——	——	——	——	——
Metal and oxide dusts	7440-25-7	5 mg/m3	10 mg/m3	——	——
TDI (Toluene-2, 4-diisocyanate)	584-84-9	0.005 ppm	0.02 ppm	——	——
TEDP (Sulfotep)	3689-24-5	0.2 mg/m3	0.6 mg/m3	——	X
Tellurium and compounds (as Te)	13494-80-9	0.1 mg/m3	0.3 mg/m3	——	——
Tellurium hexafluoride (as Te)	7783-80-4	0.02 ppm	0.06 ppm	——	——
Temephos (Abate)	3383-96-8	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
TEPP	107-49-3	0.004 ppm	0.012 ppm	——	X
Terphenyls	26140-60-3	——	——	0.5 ppm	——
1, 1, 1, 2-Tetrachloro-2, 2-difluoroethane	76-11-0	500 ppm	625 ppm	——	——
1, 1, 2, 2-Tetrachloro-1, 2-difluoroethane	76-12-0	500 ppm	625 ppm	——	——
1, 1, 2, 2-Tetrachloroethane	79-34-5	1 ppm	3 ppm	——	X
Tetrachloroethylene (Perchloroethylene)	127-18-4	25 ppm	38 ppm	——	——
Tetrachloromethane (Carbon tetrachloride)	56-23-5	2 ppm	4 ppm	——	X
Tetrachloronaphthalene	1335-88-2	2 mg/m3	4 mg/m3	——	X
Tetraethyl lead (as Pb)	78-00-2	0.075 mg/m3	0.225 mg/m3	——	X
Tetrahydrofuran	109-99-9	200 ppm	250 ppm	——	——
Tetramethyl lead (as Pb)	75-74-1	0.075 mg/m3	0.225 mg/m3	——	X
Tetramethyl succinonitrile	3333-52-6	0.5 ppm	1.5 ppm	——	X
Tetranitromethane	509-14-8	1 ppm	3 ppm	——	——
Tetrasodium pyrophosphate	7722-88-5	5 mg/m3	10 mg/m3	——	——
Tetryl (2, 4, 6-trinitrophenyl- methylnitramine)	479-45-8	1.5 mg/m3	3 mg/m3	——	X
Thallium (soluble compounds) (as Tl)	7440-28-0	0.1 mg/m3	0.3 mg/m3	——	X
4, 4-Thiobis (6-tert-butyl-m-cresol)	96-69-5	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Thiodan (Endosulfan)	115-29-7	0.1 mg/m3	0.3 mg/m3	——	X
Thioglycolic acid	68-11-1	1 ppm	3 ppm	——-	X
Thionyl chloride	7719-09-7	——	——	1 ppm	——
Thiram (see WAC 296-62-07519)	137-26-8	5 mg/m3	10 mg/m3	——	——
Tin (as Sn)	——	——	——	——	——
Inorganic compounds	7440-31-5	2 mg/m3	4 mg/m3	——	——
Tin (as Sn)	——	——	——	——	——
Organic compounds	7440-31-5	0.1 mg/m3	0.3 mg/m3	——	X
Tin oxide (as Sn)	21651-19-4	2 mg/m3	4 mg/m3	——	——
Titanium dioxide	13463-67-7	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
TNT (2, 4, 6-Trinitrotoluene)	118-96-7	0.5 mg/m3	1.5 mg/m3	——	X
Toluene	108-88-3	100 ppm	150 ppm	——	——
Toluene-2, 4-diisocyanate (TDI)	584-84-9	0.005 ppm	0.02 ppm	——-	——
m-Toluidine	108-44-1	2 ppm	4 ppm	——	X
o-Toluidine	95-53-4	2 ppm	4 ppm	——	X
p-Toluidine	106-49-0	2.0 ppm	4 ppm	——	X
Toxaphene (Chlorinated camphene)	8001-35-2	0.5 mg/m3	1 mg/m3	——	X
Tremolite (asbestiform) (as asbestos) (see WAC 296-62-07705 and chapter 296-65 WAC)	——	0.1 f/cc	1.0 f/cc (30 minutes)	——	——
Tributyl phosphate	126-73-8	0.2 ppm	0.6 ppm	——	——
Trichloroacetic acid	76-03-9	1 ppm	3 ppm	——	——
1, 2, 4-Trichlorobenzene	120-82-1	——	——	5 ppm	——
1, 1, 1-Trichloroethane (Methyl chloroform)	71-55-6	350 ppm	450 ppm	——	——
1, 1, 2-Trichloroethane	79-00-5	10 ppm	20 ppm	——	——
Trichloroethylene	79-01-6	50 ppm	200 ppm	——	——
Trichlorofluoromethane (Fluorotrichloromethane)	75-69-4	——	——	1,000 ppm	——
Trichloromethane (Chloroform)	67-66-3	2 ppm	4 ppm	——	——
Trichloronaphthalene	1321-65-9	5 mg/m3	10 mg/m3	——	X
1, 2, 3-Trichloropropane	96-18-4	10 ppm	20 ppm	——	X
1, 1, 2-Trichloro-1, 2, 2-trifluoroethane	76-13-1	1,000 ppm	1,250 ppm	——	——
Tricyclohexyltin hydroxide (Cyhexatin)	13121-70-5	5 mg/m3	10 mg/m3	——	——
Triethylamine	121-44-8	10 ppm	15 ppm	——	——
Trifluorobromomethane	75-63-8	1,000 ppm	1,250 ppm	——	——
Trimellitic anhydride	552-30-7	0.005 ppm	0.015 ppm	——	——
Trimethylamine	75-50-3	10 ppm	15 ppm	——	——
Trimethyl benzene	25551-13-7	25 ppm	38 ppm	——	——
Trimethyl phosphite	121-45-9	2 ppm	4 ppm	——	——
2, 4, 6-Trinitrophenol (Picric acid)	88-89-1	0.1 mg/m3	0.3 mg/m3	——	X
2, 4, 6-Trinitrophenyl- methylnitramine (Tetryl)	479-45-8	1.5 mg/m3	3 mg/m3	——-	X
2, 4, 6-Trinitrotoluene (TNT)	118-96-7	0.5 mg/m3	1.5 mg/m3	——	X
Triorthocresyl phosphate	78-30-8	0.1 mg/m3	0.3 mg/m3	——	X
Triphenyl amine	603-34-9	5 mg/m3	10 mg/m3	——	——
Triphenyl phosphate	115-86-6	3 mg/m3	6 mg/m3	——	——
Tungsten (as W)	7440-33-7	——	——	——	——
Soluble compounds	——	1 mg/m3	3 mg/m3	——	——
Insoluble compounds	——	5 mg/m3	10 mg/m3	——	——
Turpentine	8006-64-2	100 ppm	150 ppm	——	——
Uranium (as U)	7440-61-1	——	——	——	——
Soluble compounds	——	0.05 mg/m3	0.15 mg/m3	——	——
Insoluble compounds	——	0.2 mg/m3	0.6 mg/m3	——	——
n-Valeraldehyde	110-62-3	50 ppm	75 ppm	——	——
Vanadium (as V2O5)	——	——	——	——	——
Respirable fraction	1314-62-1	0.05 mg/m3	0.15 mg/m3	——	——
Vegetable oil mist	——	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Vinyl acetate	108-05-1	10 ppm	20 ppm	——	——
Vinyl benzene (Styrene)	100-42-5	50 ppm	100 ppm	——	——
Vinyl bromide	593-60-2	5 ppm	10 ppm	——	——
Vinyl chloride (Chloroethylene) (see WAC 296-62-07329)	75-01-4	1 ppm	5 ppm	——	——
Vinyl cyanide (Acrylonitrile) (see WAC 296-62-07336)	107-13-1	2 ppm	10 ppm	——	——
Vinyl cyclohexene dioxide	106-87-6	10 ppm	20 ppm	——	X
Vinyl toluene	25013-15-4	50 ppm	75 ppm	——	——
Vinylidene chloride (1, 1-Dichloroethylene)	75-35-4	1 ppm	3 ppm	——	——
VM & P Naphtha	8032-32-4	300 ppm	400 ppm	——	——
Warfarin	81-81-2	0.1 mg/m3	0.3 mg/m3	——	——
Welding fumes (total particulate)	——	5 mg/m3	10 mg/m3	——	——
Wood dust	——	——	——	——	——
Nonallergenic; (All woods except allergenics)	——	5 mg/m3	10 mg/m3	——	——
Allergenics (e.g. cedar, mahogany and teak)	——	2.5 mg/m3	5 mg/m3	——	——
Xylenes (ortho, meta, and para isomers) (Dimethylbenzene)	1330-20-7	100 ppm	150 ppm	——	——
m-Xylene alpha, alpha-diamine	1477-55-0	——	——	0.1 mg/m3	X
Xylidine (Dimethylaminobenzene)	1300-73-8	2 ppm	4 ppm	——	X
Yttrium	7440-65-5	1 mg/m3	3 mg/m3	——	——
Zinc chloride fume	7646-85-7	1 mg/m3	2 mg/m3	——	——
Zinc chromate (as Cr) (see WAC 296-62-08003)	Varies with compound	0.005 mg/m3	——	0.1 mg/m3	——
Zinc oxide	1314-13-2	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m	——	——
Zinc oxide fume	1314-13-2	5 mg/g3	10 mg/m3	——	——
Zinc stearate	557-05-1	——	——	——	——
Total particulate	——	10 mg/m3	20 mg/m3	——	——
Respirable fraction	——	5 mg/m3	10 mg/m3	——	——
Zirconium compounds (as Zr)	7440-67-2	5 mg/m3	10 mg/m3	——	——

Chapter 296-850 WAC

BERYLLIUM

WAC 296-850-090Definitions.

For the purposes of this section the following definitions apply:

Action level - A concentration of airborne beryllium of 0.1 micrograms per cubic meter of air (µg/m³) calculated as an 8-hour time-weighted average (TWA).

Airborne exposure and airborne exposure to beryllium - The exposure to airborne beryllium that would occur if the employee were not using a respirator.

Beryllium lymphocyte proliferation test (BeLPT) - The measurement of blood lymphocyte proliferation in a laboratory test when lymphocytes are challenged with a soluble beryllium salt.

Beryllium work area - Any work area:

(a) Containing a process or operation that can release beryllium and involves material that contains at least 0.1 percent beryllium by weight; and

(b) Where employees are, or can reasonably be expected to be, exposed to airborne beryllium at any level or where there is the potential for dermal contact with beryllium.

CBD diagnostic center - A medical diagnostic center that has an on-site pulmonary specialist and on-site facilities to perform a clinical evaluation for the presence of chronic beryllium disease (CBD). This evaluation must include pulmonary function testing (as outlined by the American Thoracic Society criteria), bronchoalveolar lavage (BAL), and transbronchial biopsy. The CBD diagnostic center must also have the capacity to transfer BAL samples to a laboratory for appropriate diagnostic testing within twenty-four hours. The on-site pulmonary specialist must be able to interpret the biopsy pathology and the BAL diagnostic test results.

Chronic beryllium disease (CBD) - A chronic granulomatous (inflammatory) disease primarily of the lung, caused by exposure to beryllium, that meets the diagnostic criteria published in the department of labor and industries clinical guideline for the Diagnosis of Beryllium Sensitization and Chronic Beryllium Disease.

Competent person - An individual who is capable of identifying existing and foreseeable beryllium 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, ability, and authority necessary to fulfill the responsibilities set forth in WAC 296-850-125. This term is applicable in construction work conducted under contract with a building or facility owner or other building representative.

Confirmed positive - The person tested has beryllium sensitization, as indicated by two abnormal BeLPT test results, an abnormal and a borderline test result, or three borderline test results, or any cases confirmed by the criteria published in the department of labor and industries clinical guideline for the Diagnosis of Beryllium Sensitization and Chronic Beryllium Disease. It also means the result of a more reliable and accurate test indicating a person has been identified as having beryllium sensitization.

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.

Contaminated with beryllium and beryllium-contaminated – Contaminated with dust, fumes, mists, or solutions containing beryllium in concentrations greater than or equal to 0.1 percent by weight.

Dermal contact with beryllium – Skin exposure to:

(a) Soluble beryllium compounds containing beryllium in concentrations greater than or equal to 0.1 percent by weight;

(b) Solutions containing beryllium in concentrations greater than or equal to 0.1 percent by weight; or

Emergency - Any occurrence such as, but not limited to, equipment failure, rupture of containers, or failure of control equipment, which may or does result in an uncontrolled and unintended release of airborne beryllium that presents a significant hazard.

High-efficiency particulate air (HEPA) filter - A filter that is at least 99.97 percent efficient in removing particles 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 airborne exposure to beryllium 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 airborne exposure potential than the processes, types of material, control methods, work practices, and environmental conditions in the employer's current operations.

Physician or other licensed health care professional (PLHCP) - An individual whose legally permitted scope of practice (i.e., license, registration, or certification) allows the individual to independently provide or be delegated the responsibility to provide some or all of the health care services required by WAC 296-850-155.

Regulated area - An area, including temporary work areas where maintenance or nonroutine tasks are performed, where an employee's airborne exposure exceeds, or can reasonably be expected to exceed, either the time-weighted average (TWA) permissible exposure limit (PEL) or short term exposure limit (STEL).

Ship breaking - Breaking down a vessel's structure to scrap the vessel, including the removal of gear, equipment or any component part of a vessel.

Ship building - Construction of a vessel, including the installation of machinery and equipment.

Ship repairing - Repair of a vessel including, but not limited to, alterations, conversions, installations, cleaning, painting, and maintenance.

WAC 296-850-100Scope and application.

This standard applies to occupational exposure to beryllium in all forms, compounds, and mixtures, except:

(1) This standard does not apply to articles, as defined in chapter 296-901 WAC, Globally harmonized system for hazard communication, that contain beryllium and that the employer does not process.

(2) This standard does not apply to materials containing less than 0.1% beryllium by weight where the employer has objective data demonstrating that employee exposure to beryllium will remain below the action level as an 8-hour TWA under any foreseeable conditions.

WAC 296-850-110Permissible exposure limits.

(1) Time-weighted average (TWA) PEL. The employer must ensure that no employee is exposed to an airborne concentration of beryllium in excess of 0.2 µg/m³ calculated as an 8-hour TWA.

(2) Short-term exposure limit (STEL). The employer must ensure that no employee is exposed to an airborne concentration of beryllium in excess of 2.0 µg/m³ as determined over a sampling period of fifteen minutes.

WAC 296-850-115Exposure assessment.

(1) General. The employer must assess the airborne exposure of each employee who is or may reasonably be expected to be exposed to airborne beryllium in accordance with either the performance option in subsection (2) of this section or the scheduled monitoring option in subsection (3) of this section.

(2) Performance option. The employer must assess the 8-hour TWA exposure and the fifteen-minute short-term exposure for each employee on the basis of any combination of air monitoring data and objective data sufficient to accurately characterize airborne exposure to beryllium.

(3) Scheduled monitoring option.

(a) The employer must perform initial monitoring to assess the 8-hour TWA exposure for each employee on the basis of one or more personal breathing zone air samples that reflect the airborne exposure of employees on each shift, for each job classification, and in each work area.

(b) The employer must perform initial monitoring to assess the short-term exposure from fifteen-minute personal breathing zone air samples measured in operations that are likely to produce airborne exposure above the STEL for each work shift, for each job classification, and in each work area.

(c) Where several employees perform the same tasks on the same shift and in the same work area, the employer may sample a representative fraction of these employees in order to meet the requirements of this subsection. In representative sampling, the employer must sample the employee(s) expected to have the highest airborne exposure to beryllium.

(d) If initial monitoring indicates that airborne exposure is below the action level and at or below the STEL, the employer may discontinue monitoring for those employees whose airborne exposure is represented by such monitoring.

(e) Where the most recent exposure monitoring indicates that airborne exposure is at or above the action level but at or below the TWA PEL, the employer must repeat such monitoring within six months of the most recent monitoring.

(f) Where the most recent exposure monitoring indicates that airborne exposure is above the TWA PEL, the employer must repeat such monitoring within three months of the most recent 8-hour TWA exposure monitoring.

(g) Where the most recent (noninitial) exposure monitoring indicates that airborne exposure is below the action level, the employer 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, at which time the employer may discontinue 8-hour TWA exposure monitoring for those employees whose exposure is represented by such monitoring, except as otherwise provided in subsection (4) of this section, reassessment of exposure.

(h) Where the most recent exposure monitoring indicates that airborne exposure is above the STEL, the employer must repeat such monitoring within three months of the most recent short-term exposure monitoring until two consecutive measurements, taken seven or more days apart, are below the STEL, at which time the employer may discontinue short-term exposure monitoring for those employees whose exposure is represented by such monitoring, except as otherwise provided in subsection (4) of this section, reassessment of exposure.

(4) Reassessment of exposure. The employer must reassess airborne exposure whenever a change in the production, process, control equipment, personnel, or work practices may reasonably be expected to result in new or additional airborne exposure at or above the action level or STEL, or when the employer has any reason to believe that new or additional airborne exposure at or above the action level or STEL has occurred.

(5) Methods of sample analysis. The employer must ensure that all air monitoring samples used to satisfy the monitoring requirements of this subsection are evaluated by a laboratory that can measure beryllium to an accuracy of plus or minus twenty-five percent within a statistical confidence level of ninety-five percent for airborne concentrations at or above the action level.

(6) Employee notification of assessment results.

(a) Within fifteen working days after completing an exposure assessment in accordance with this subsection, the employer must notify each employee whose airborne exposure is represented by the assessment of the results of that assessment individually in writing or post the results in an appropriate location that is accessible to each of these employees.

(b) Whenever an exposure assessment indicates that airborne exposure is above the TWA PEL or STEL, the employer must describe in the written notification the corrective action being taken to reduce airborne exposure to or below the exposure limit(s) exceeded where feasible corrective action exists but had not been implemented when the monitoring was conducted.

(7) Observation of monitoring.

(a) The employer must provide an opportunity to observe any exposure monitoring required by this standard to each employee whose airborne exposure is measured or represented by the monitoring and each employee's representative(s).

(b) When observation of monitoring requires entry into an area where the use of personal protective clothing or equipment (which may include respirators) is required, the employer must provide each observer with appropriate personal protective clothing and equipment at no cost to the observer and must ensure that each observer uses such clothing and equipment.

WAC 296-850-120Beryllium work areas and regulated areas.

(1) Establishment.

(a) The employer must establish and maintain a beryllium work area wherever the criteria for a "beryllium work area" set forth in WAC 296-850-090 Definitions, are met.


Exception:	It is not required to establish a work area for construction work, ship breaking, ship building or ship repairing.

(b) The employer must establish and maintain a regulated area wherever employees are, or can reasonably be expected to be, exposed to airborne beryllium at levels above the TWA PEL or STEL.


Exception:	It is not required to establish a regulated area for construction work.

(2) Demarcation.

(a) The employer must identify each beryllium work area through signs or any other methods that adequately establish and inform each employee of the boundaries of each beryllium work area.

(b) The employer must identify each regulated area in accordance with WAC 296-850-165(2) warning signs, of this rule.

(3) Access. The employer must limit access to regulated areas to:

(a) Persons the employer authorizes or requires to be in a regulated area to perform work duties;

(b) Persons entering a regulated area as designated representatives of employees for the purpose of exercising the right to observe exposure monitoring procedures under WAC 296-850-115(7) observation of monitoring; and

(4) Provision of personal protective clothing and equipment, including respirators. The employer must provide and ensure that each employee entering a regulated area uses:

(a) Respiratory protection in accordance with WAC 296-850-135 Respiratory protection, of this rule; and

(b) Personal protective clothing and equipment in accordance with WAC 296-850-140 Personal protective clothing and equipment, of this rule.

WAC 296-850-125Competent person.

For construction and maintenance projects, wherever employees are, or can reasonably be expected to be, exposed to airborne beryllium at levels above the TWA PEL or STEL, the employer must designate a competent person to:

(1) Make frequent and regular inspections of job sites, materials, and equipment;

(2) Implement the written exposure control plan under WAC 296-850-130 Methods of compliance, of this rule;

(3) Ensure that all employees use respiratory protection in accordance with WAC 296-850-135 Respiratory protection, of this rule; and

(4) Ensure that all employees use personal protective clothing and equipment in accordance with WAC 296-850-140 Personal protective clothing and equipment, of this rule.

WAC 296-850-130Methods of compliance.

(1) Written exposure control plan.

(a) The employer must establish, implement, and maintain a written exposure control plan, which must contain:

(i) A list of operations and job titles reasonably expected to involve airborne exposure to or dermal contact with beryllium;

(ii) A list of operations and job titles reasonably expected to involve airborne exposure at or above the action level;

(iii) A list of operations and job titles reasonably expected to involve airborne exposure above the TWA PEL or STEL;

(iv) Procedures for minimizing cross-contamination, including preventing the transfer of beryllium between surfaces, equipment, clothing, materials, and articles within beryllium work areas;

(v) Procedures for keeping surfaces as free as practicable of beryllium;

(vi) Procedures for minimizing the migration of beryllium from beryllium work areas to other locations within or outside the workplace;

(vii) A list of engineering controls, work practices, and respiratory protection required by subsection (2) of this section engineering and work practice controls, of this rule;

(viii) A list of personal protective clothing and equipment required by WAC 296-850-140 Personal protective clothing and equipment, of this rule;

(ix) Procedures for removing, laundering, storing, leaning, repairing, and disposing of beryllium-contaminated personal protective clothing and equipment, including respirators; and

(x) For construction work, procedures used to restrict access to work areas when airborne exposures are, or can reasonably be expected to be, above the TWA PEL or STEL, to minimize the number of employees exposed to airborne beryllium and their level of exposure, including exposures generated by other employers or sole proprietors.

(b) The employer must review and evaluate the effectiveness of each written exposure control plan at least annually and update it, as necessary, when:

(i) Any change in production processes, materials, equipment, personnel, work practices, or control methods results, or can reasonably be expected to result, in new or additional airborne exposure to beryllium;

(ii) The employer is notified that an employee is eligible for medical removal in accordance with WAC 296-850-160, referred for evaluation at a CBD diagnostic center, or shows signs or symptoms associated with airborne exposure to or dermal contact with beryllium; or

(iii) The employer has any reason to believe that new or additional airborne exposure is occurring or will occur.

(c) The employer must make a copy of the written exposure control plan accessible to each employee who is, or can reasonably be expected to be, exposed to airborne beryllium in accordance with chapter 296-802 WAC, Employee medical and exposure records.

(2) Engineering and work practice controls.

(a) The employer must use engineering and work practice controls to reduce and maintain employee airborne exposure to beryllium to or below the PEL and STEL, unless the employer can demonstrate that such controls are not feasible. Wherever the employer demonstrates that it is not feasible to reduce airborne exposure to or below the PELs with engineering and work practice controls, the employer must implement and maintain engineering and work practice controls to reduce airborne exposure to the lowest levels feasible and supplement these controls using respiratory protection in accordance with WAC 296-850-135 Respiratory protection.

(b) Where exposures are, or can reasonably be expected to be, at or above the action level, the employer must ensure that at least one of the following is in place to reduce airborne exposure:

(i) Material and/or process substitution;

(ii) Isolation, such as ventilated partial or full enclosures;

(iii) Local exhaust ventilation, such as at the points of operation, material handling, and transfer; or

(iv) Process control, such as wet methods and automation.

(i) The employer can establish that such controls are not feasible; or

(ii) The employer can demonstrate that airborne exposure is below the action level, using no fewer than two representative personal breathing zone samples taken at least seven days apart, for each affected operation.

(3) Prohibition of rotation. The employer must not rotate employees to different jobs to achieve compliance with the PELs.

WAC 296-850-135Respiratory protection.

(1) General. The employer must provide respiratory protection at no cost to the employee and ensure that each employee uses respiratory protection:

(a) During periods necessary to install or implement feasible engineering and work practice controls where airborne exposure exceeds, or can reasonably be expected to exceed, the TWA PEL or STEL;

(b) During operations, including maintenance and repair activities and nonroutine tasks, when engineering and work practice controls are not feasible and airborne exposure exceeds, or can reasonably be expected to exceed, the TWA PEL or STEL;

(c) During operations for which an employer has implemented all feasible engineering and work practice controls when such controls are not sufficient to reduce airborne exposure to or below the TWA PEL or STEL;

(d) During emergencies; and

(e) When an employee who is eligible for medical removal under WAC 296-850-160(1) chooses to remain in a job with airborne exposure at or above the action level, as permitted by WAC 296-850-160 (2)(b).

(2) Respiratory protection program. Where this standard requires an employer to provide respiratory protection, the selection and use of such respiratory protection must be in accordance with chapter 296-842 WAC, Respirators.

(3) The employer must provide at no cost to the employee a powered air-purifying respirator (PAPR) instead of a negative pressure respirator when:

(a) Respiratory protection is required by this standard;

(b) An employee entitled to such respiratory protection requests a PAPR; and

(c) The PAPR provides adequate protection to the employee in accordance with subsection (2) of this section, respiratory protection program of this rule.

WAC 296-850-140Personal protective clothing and equipment.

(1) Provision and use. The employer must provide at no cost, and ensure that each employee uses, appropriate personal protective clothing and equipment in accordance with the written exposure control plan required under subsection (1) of this section and other applicable requirements for personal protective equipment. (WAC 296-800-160 Summary personal protective equipment (PPE). Chapter 296-155 WAC, Part C, Personal protective and lifesaving equipment. WAC 296-304-090 Personal protective equipment (PPE)—General requirements.):

(a) Where airborne exposure exceeds, or can reasonably be expected to exceed, the TWA PEL or STEL; or

(b) Where there is a reasonable expectation of dermal contact with beryllium.

(2) Removal and storage.

(a) The employer must ensure that each employee removes all beryllium-contaminated personal protective clothing and equipment at the end of the work shift, at the completion of tasks involving beryllium, or when personal protective clothing or equipment becomes visibly contaminated with beryllium, whichever comes first.

(b) The employer must ensure that each employee removes beryllium-contaminated personal protective clothing and equipment as specified in the written exposure control plan required by WAC 296-850-130(1).

(c) The employer must ensure that each employee stores and keeps beryllium-contaminated personal protective clothing and equipment separate from street clothing and that storage facilities prevent cross-contamination as specified in the written exposure control plan required by WAC 296-850-130(1).

(d) The employer must ensure that no employee removes beryllium-contaminated personal protective clothing or equipment from the workplace, except for employees authorized to do so for the purposes of laundering, cleaning, maintaining or disposing of beryllium-contaminated personal protective clothing and equipment at an appropriate location or facility away from the workplace.

(e) When personal protective clothing or equipment required by this standard is removed from the workplace for laundering, cleaning, maintenance or disposal, the employer must ensure that personal protective clothing and equipment are stored and transported in sealed bags or other closed containers that are impermeable and are labeled in accordance with WAC 296-850-165(3) and chapter 296-901 WAC, Globally harmonized system for hazard communication.

(3) Cleaning and replacement.

(a) The employer must ensure that all reusable personal protective clothing and equipment required by this standard is cleaned, laundered, repaired, and replaced as needed to maintain its effectiveness.

(b) The employer must ensure that beryllium is not removed from beryllium-contaminated personal protective clothing and equipment by blowing, shaking or any other means that disperses beryllium into the air.

(c) The employer must inform in writing the persons or the business entities who launder, clean or repair the personal protective clothing or equipment required by this standard of the potentially harmful effects of airborne exposure to and dermal contact with beryllium and that the personal protective clothing and equipment must be handled in accordance with this standard.

WAC 296-850-145Hygiene areas and practices.

(1) General. For each employee working in a beryllium work area or required to use personal protective clothing or equipment by this rule in construction work, ship breaking, ship building, or ship repairing, the employer must:

(a) Provide readily accessible washing facilities in accordance with this standard and other applicable sanitation standards (WAC 296-800-230 Summary (drinking water, bathrooms, washing facilities and waste disposal); WAC 296-155-140 Sanitation; WAC 296-304-06002 Sanitation) to remove beryllium from the hands, face, and neck; and

(b) Ensure that employees who have dermal contact with beryllium wash any exposed skin at the end of the activity, process, or work shift and prior to eating, drinking, smoking, chewing tobacco or gum, applying cosmetics, or using the toilet.

(2) Change rooms. In addition to the requirements of subsection (1)(a) of this section, the employer must provide employees who work in a beryllium work area with a designated change room in accordance with this standard and other applicable sanitation standards (WAC 296-800-230 Summary (drinking water, bathrooms, washing facilities and waste disposal); WAC 296-155-140 Sanitation; WAC 296-304-06002 Sanitation) where employees are required to remove their personal clothing.

(3) Showers.

(a) The employer must provide showers in accordance with other applicable sanitation standards (WAC 296-800-230 Summary (drinking water, bathrooms, washing facilities and waste disposal); WAC 296-155-140 Sanitation; WAC 296-304-06002 Sanitation) where:

(i) Airborne exposure exceeds, or can reasonably be expected to exceed, the TWA PEL or STEL; and

(ii) Employees' hair or body parts other than hands, face, and neck can reasonably be expected to become contaminated with beryllium.

(b) Employers required to provide showers must ensure that each employee showers at the end of the work shift or work activity if:

(i) The employee reasonably could have had airborne exposure above the TWA PEL or STEL; and

(ii) The employee's hair or body parts other than hands, face, and neck could reasonably have become contaminated with beryllium.

(4) Eating and drinking areas. Wherever the employer allows employees to consume food or beverages at a worksite where beryllium is present, the employer must ensure that:

(a) Beryllium-contaminated surfaces in eating and drinking areas are as free as practicable of beryllium;

(b) No employees enter any eating or drinking area with beryllium-contaminated personal protective clothing or equipment unless, prior to entry, surface beryllium has been removed from the clothing or equipment by methods that do not disperse beryllium into the air or onto an employee's body; and

(c) Eating and drinking facilities provided by the employer are in accordance with other applicable sanitation standards (WAC 296-800-230 Summary (drinking water, bathrooms, washing facilities and waste disposal); WAC 296-155-140 Sanitation; WAC 296-304-06002 Sanitation).

(5) Prohibited activities. The employer must ensure that no employees eat, drink, smoke, chew tobacco or gum, or apply cosmetics in regulated areas and other work areas where there is a reasonable expectation of exposure above the TWA PEL or STEL.

WAC 296-850-150Housekeeping.

(1) General.

(a) The employer must maintain all surfaces in beryllium work areas and regulated areas as free as practicable of beryllium and in accordance with the written exposure control plan required under WAC 296-850-130(1) and the cleaning methods required under this subsection;

(b) In construction work, ship breaking, ship building or ship repairing, when cleaning beryllium-contaminated areas, the employer must follow the written exposure control plan required under WAC 296-850-130(1); and

(c) The employer must ensure that all spills and emergency releases of beryllium are cleaned up promptly and in accordance with the written exposure control plan required under WAC 296-850-130(1) and the cleaning methods required under this subsection.

(2) Cleaning methods.

(a) The employer must ensure that surfaces in beryllium work areas and regulated areas are cleaned by HEPA-filtered vacuuming or other methods that minimize the likelihood and level of airborne exposure.

(b) The employer must not allow dry sweeping or brushing for cleaning surfaces in beryllium-work areas or regulated areas unless HEPA-filtered vacuuming or other methods that minimize the likelihood and level of airborne exposure are not safe or effective.

(c) The employer must not allow the use of compressed air for cleaning beryllium-contaminated surfaces unless the compressed air is used in conjunction with a ventilation system designed to capture the particulates made airborne by the use of compressed air.

(d) Where employees use dry sweeping, brushing, or compressed air to clean beryllium-contaminated surfaces, the employer must provide, and ensure that each employee uses, respiratory protection and personal protective clothing and equipment in accordance with WAC 296-850-135 Respiratory protection, and WAC 296-850-140 Personal protective clothing and equipment.

(e) The employer must ensure that cleaning equipment is handled and maintained in a manner that minimizes the likelihood and level of airborne exposure and the reentrainment of airborne beryllium in the workplace.

(3) Disposal and recycling. For materials that contain beryllium in concentrations of 0.1 percent by weight or more or are contaminated with beryllium, the employer must ensure that:

(a) Materials designated for disposal are disposed of in sealed, impermeable enclosures, such as bags or containers, that are labeled in accordance with WAC 296-850-165(3) warning labels.

(b) Materials designated for recycling are cleaned to be as free as practicable of surface beryllium contamination and labeled in accordance with WAC 296-850-165(3), or placed in sealed, impermeable enclosures, such as bags or containers, that are labeled in accordance with WAC 296-850-165(3).

WAC 296-850-155Medical surveillance.

(1) General.

(a) The employer must make medical surveillance required by this section available at no cost to the employee, and at a reasonable time and place, to each employee:

(i) Who is or is reasonably expected to be exposed at or above the action level for more than thirty days per year;

(ii) Who shows signs or symptoms of CBD or other beryllium-related health effects;

(iii) Who is exposed to beryllium during an emergency; or

(iv) Whose most recent written medical opinion required by this section recommends periodic medical surveillance.

(b) The employer must ensure that all medical examinations and procedures required by this standard are performed by, or under the direction of, a licensed physician.

(c) When requested by an employee who provides the employer with an abnormal or borderline finding for a single blood BeLPT or two borderline blood BeLPT, the employer must arrange for medical examinations and procedures to be performed at a CBD diagnostic center that is mutually agreed upon by the employer and the employee, or at the CBD diagnostic center requested by the employee, when the center is recognized by the department as a center for research and clinical assessment of chemically related illness (see RCW 51.32.360).

(2) Frequency. The employer must provide a medical examination:

(a) Within thirty days after determining that:

(i) An employee meets the criteria of subsection (1)(a)(i) of this section, unless the employee has received a medical examination, provided in accordance with this standard, within the last two years; or who shows signs or symptoms of CBD or other beryllium-related health effects;

(ii) An employee meets the criteria of subsection (1)(a)(ii) or (iii) of this section.

(b) At least every two years thereafter for each employee who continues to meet the criteria of subsection (1)(a)(i), (ii), or (iv) of this section.

(c) At the termination of employment for each employee who meets any of the criteria of subsection (1)(a) of this section at the time the employee's employment terminates, unless an examination has been provided in accordance with this standard during the six months prior to the date of termination.

(3) Contents of examination.

(a) The employer must ensure that the PLHCP conducting the examination advises the employee of the risks and benefits of participating in the medical surveillance program and the employee's right to opt out of any or all parts of the medical examination.

(b) The employer must ensure that the employee is offered a medical examination that includes:

(i) A medical and work history, with emphasis on past and present airborne exposure to or dermal contact with beryllium, smoking history, and any history of respiratory system dysfunction;

(ii) A physical examination with emphasis on the respiratory system;

(iii) A physical examination for skin rashes;

(iv) Pulmonary function tests, performed in accordance with the guidelines established by the American Thoracic Society including forced vital capacity (FVC) and forced expiratory volume in one second (FEV1);

(v) A standardized BeLPT or equivalent test, upon the first examination and at least every two years thereafter, unless the employee is confirmed positive. If the results of the BeLPT are other than normal, follow-up BeLPT testing must be offered within thirty days, unless the employee has been confirmed positive or unless the employee requests a medical examination as according to subsection (1)(c) of this section. Samples must be analyzed in a laboratory certified under the College of American Pathologists/Clinical Laboratory Improvement Amendments (CLIA) guidelines to perform the BeLPT;

(vi) A low dose computed tomography (LDCT) scan, when recommended by the PLHCP after considering the employee's history of exposure to beryllium along with other risk factors, such as smoking history, family medical history, sex, age, and presence of existing lung disease; and

(vii) Any other test deemed appropriate by the PLHCP.

(4) Information provided to the PLHCP. The employer must ensure that the examining PLHCP (and the evaluating CBD diagnostic center, if an evaluation is required under subsection (7) of this section) has a copy of this rule and must provide the following information, if known:

(a) A description of the employee's former and current duties that relate to the employee's airborne exposure to and dermal contact with beryllium;

(b) The employee's former and current levels of airborne exposure;

(c) A description of any personal protective clothing and equipment, including respirators, used by the employee, including when and for how long the employee has used that personal protective clothing and equipment; and

(d) Information from records of employment-related medical examinations previously provided to the employee, currently within the control of the employer, after obtaining written consent from the employee.

(5) Licensed physician's written medical report for the employee.


Exception:	When the PLHCP assists the worker in filing a claim under Title 51 RCW, Industrial insurance, the PLHCP does not need to prepare a separate report for the employee if all the information required in this section is entered into the claim record, the report is directly shared with the employee, and the PLHCP explains the results of the examination to the employee. The PLHCP may provide additional reports or notes to make sure the employee understands the results of the examination and recommendations.

Exception:

When the PLHCP assists the worker in filing a claim under Title 51 RCW, Industrial insurance, the PLHCP does not need to prepare a separate report for the employee if all the information required in this section is entered into the claim record, the report is directly shared with the employee, and the PLHCP explains the results of the examination to the employee. The PLHCP may provide additional reports or notes to make sure the employee understands the results of the examination and recommendations.

The employer must ensure that the employee receives a written medical report from the licensed physician within forty-five days of the examination (including any follow-up BeLPT required under subsection (3)(b)(v) of this section) and that the PLHCP explains the results of the examination to the employee. The written medical report must contain:

(a) A statement indicating the results of the medical examination, including the licensed physician's opinion as to whether the employee has:

(i) Any detected medical condition, such as CBD or beryllium sensitization (i.e., the employee is confirmed positive, as defined in WAC 296-850-090), that may place the employee at increased risk from further airborne exposure; and

(ii) Any medical conditions related to airborne exposure that require further evaluation or treatment.

(b) Any recommendations on:

(i) The employee's use of respirators, protective clothing, or equipment; or

(ii) Limitations on the employee's airborne exposure to beryllium.

(c) If the employee is confirmed positive or diagnosed with CBD or if the licensed physician otherwise deems it appropriate, the written report must also contain a referral for an evaluation at a CBD diagnostic center.

(d) If the employee is confirmed positive or diagnosed with CBD, the written report must also contain a recommendation for continued periodic medical surveillance.

(e) If the employee is confirmed positive or diagnosed with CBD, the written report must also contain a recommendation for medical removal from airborne exposure to beryllium, as described in WAC 296-850-160.

(6) Licensed physician's written medical opinion for the employer.


Exception:	When a claim has been initiated the PLHCP does not need to prepare a separate report for the employer if all information required in this section is entered into the claim record. As part of initiating a claim, the employee agrees to share all of the relevant medical records, and the limits on information reported to the employer in this section do not apply.

(a) The employer must obtain a written medical opinion from the licensed physician within forty-five days of the medical examination (including any follow-up BeLPT required under subsection (3)(b)(v) of this section). The written medical opinion must contain only the following:

(i) The date of the examination;

(ii) A statement that the examination has met the requirements;

(iii) Any recommended limitations on the employee's use of respirators, protective clothing, or equipment; and

(iv) A statement that the PLHCP has explained the results of the medical examination to the employee, including any tests conducted, any medical conditions related to airborne exposure that require further evaluation or treatment, and any special provisions for use of personal protective clothing or equipment.

(b) If the employee provides written authorization, the written opinion must also contain any recommended limitations on the employee's airborne exposure to beryllium.

(c) If the employee is confirmed positive or diagnosed with CBD or if the licensed physician otherwise deems it appropriate, and the employee provides written authorization, the written opinion must also contain a referral for an evaluation at a CBD diagnostic center.

(d) If the employee is confirmed positive or diagnosed with CBD and the employee provides written authorization, the written opinion must also contain a recommendation for continued periodic medical surveillance.

(e) If the employee is confirmed positive or diagnosed with CBD and the employee provides written authorization, the written opinion must also contain a recommendation for medical removal from airborne exposure to beryllium, as described in WAC 296-850-160.

(f) The employer must ensure that each employee receives a copy of the written medical opinion described in this subsection within forty-five days of any medical examination (including any follow-up BeLPT required under subsection (3)(b)(v) of this section) performed for that employee.

(7) CBD diagnostic center.

(a) The employer must provide an evaluation at no cost to the employee at a CBD diagnostic center that is mutually agreed upon by the employer and the employee, or at the CBD diagnostic center requested by the employee, when the center is recognized by the department as a center for research and clinical assessment of chemically related illness (see RCW 51.32.360). The examination must be provided within thirty days of:

(i) The employer's receipt of a physician's written medical opinion to the employer that recommends referral to a CBD diagnostic center; or

(ii) The employee presenting to the employer a physician's written medical report indicating that the employee has been confirmed positive or diagnosed with CBD, or recommending referral to a CBD diagnostic center.

(b) The employer must ensure that the employee receives a written medical report from the CBD diagnostic center that contains all the information required in subsection (5)(a), (b), (c), and (e) of this section and that the PLHCP explains the results of the examination to the employee within thirty days of the examination.

(c) The employer must obtain a written medical opinion from the CBD diagnostic center within thirty days of the medical examination. The written medical opinion must contain only the information in subsection (6)(a) of this section, as applicable, unless the employee provides written authorization to release additional information. If the employee provides written authorization, the written opinion must also contain the information from subsection (6)(b), (d), and (e) of this section, if applicable.

(d) The employer must ensure that each employee receives a copy of the written medical opinion from the CBD diagnostic center described in this subsection within thirty days of any medical examination performed for that employee.

(e) After an employee has received the initial clinical evaluation at a CBD diagnostic center described in (a) of this subsection, the employee may choose to have any subsequent medical examinations for which the employee is eligible under this section performed at a CBD diagnostic center mutually agreed upon by the employer and the employee, or at the CBD diagnostic center requested by the employee, when the center is recognized by the department as a center for research and clinical assessment of chemically related illness (see RCW 51.32.360). The employer must provide such examinations at no cost to the employee.

WAC 296-850-160Medical removal.

(1) An employee is eligible for medical removal, if the employee works in a job with airborne exposure at or above the action level and either:

(a) The employee provides the employer with:

(i) An abnormal or borderline finding for a single blood BeLPT test, until confirmatory testing is completed; or

(ii) A written medical report indicating a confirmed positive finding or CBD diagnosis; or

(iii) A written medical report recommending removal from airborne exposure to beryllium in accordance with WAC 296-850-155 (5)(e) or (7)(b); or

(b) The employer receives a written medical opinion recommending removal from airborne exposure to beryllium in accordance with WAC 296-850-155 (6)(e) or (7)(c).

(2) If an employee is eligible for medical removal, the employer must provide the employee with the employee's choice of:

(a) Removal as described in subsection (3) of this section; or

(b) Remaining in a job with airborne exposure at or above the action level, provided that the employer provides, and ensures that the employee uses, respiratory protection that complies with WAC 296-850-135 Respiratory protection, of this rule whenever airborne exposures are at or above the action level.

(3) If the employee chooses removal:

(a) If a comparable job is available where airborne exposures to beryllium are below the action level, and the employee is qualified for that job or can be trained within one month, the employer must remove the employee to that job. The employer must maintain for six months from the time of removal the employee's base earnings, seniority, and other rights and benefits that existed at the time of removal.

(b) If comparable work is not available, the employer must maintain the employee's base earnings, seniority, and other rights and benefits that existed at the time of removal for six months or until such time that comparable work described in (a) of this subsection becomes available, whichever comes first.

(4) The employer's obligation to provide medical removal protection benefits to a removed employee shall be reduced to the extent that the employee receives compensation for earnings lost during the period of removal from a publicly or employer-funded compensation program, or receives income from another employer made possible by virtue of the employee's removal.

WAC 296-850-165Communication of hazards.

(1) General.

(a) Chemical manufacturers, importers, distributors, and employers must comply with all requirements of chapter 296-901 WAC, Globally harmonized system for hazard communication, for beryllium.

(b) In classifying the hazards of beryllium, at least the following hazards must be addressed: Cancer; lung effects (CBD and acute beryllium disease); beryllium sensitization; skin sensitization; and skin, eye, and respiratory tract irritation.

(c) Employers must include beryllium in the hazard communication program established to comply with the HCS. Employers must ensure that each employee has access to labels on containers of beryllium and to safety data sheets, and is trained in accordance with the requirements of chapter 296-901 WAC, Globally harmonized system for hazard communication, and subsection (4) of this section.

(2) Warning signs.

(a) Posting. The employer must provide and display warning signs at each approach to a regulated area so that each employee is able to read and understand the signs and take necessary protective steps before entering the area.

(b) Sign specification.

(i) The employer must ensure that the warning signs required by (a) of this subsection are legible and readily visible.

(ii) The employer must ensure each warning sign required by (a) of this subsection bears the following legend:

DANGER

REGULATED AREA

BERYLLIUM

MAY CAUSE CANCER

CAUSES DAMAGE TO LUNGS

AUTHORIZED PERSONNEL ONLY

WEAR RESPIRATORY PROTECTION AND PERSONAL

PROTECTIVE CLOTHING AND EQUIPMENT IN THIS AREA

(3) Warning labels. Consistent with chapter 296-901 WAC, Globally harmonized system for hazard communication, the employer must label each bag and container of clothing, equipment, and materials contaminated with beryllium, and must, at a minimum, include the following on the label:

DANGER

CONTAINS BERYLLIUM

MAY CAUSE CANCER

CAUSES DAMAGE TO LUNGS

AVOID CREATING DUST

DO NOT GET ON SKIN

(4) Employee information and training.

(a) For each employee who has, or can reasonably be expected to have, airborne exposure to or dermal contact with beryllium:

(i) The employer must provide information and training in accordance with chapter 296-901 WAC, Globally harmonized system for hazard communication;

(ii) The employer must provide initial training to each employee by the time of initial assignment; and

(iii) The employer must repeat the training required under this standard annually for each employee.

(b) The employer must ensure that each employee who is, or can reasonably be expected to be, exposed to airborne beryllium can demonstrate knowledge and understanding of the following:

(i) The health hazards associated with airborne exposure to and contact with beryllium, including the signs and symptoms of CBD;

(ii) The written exposure control plan, with emphasis on the location(s) of beryllium work areas, including any regulated areas, and the specific nature of operations that could result in airborne exposure, especially airborne exposure above the TWA PEL or STEL;

(iii) The purpose, proper selection, fitting, proper use, and limitations of personal protective clothing and equipment, including respirators;

(iv) Applicable emergency procedures;

(v) Measures employees can take to protect themselves from airborne exposure to and contact with beryllium, including personal hygiene practices;

(vi) The purpose and a description of the medical surveillance program required by WAC 296-850-155 including risks and benefits of each test to be offered;

(vii) The purpose and a description of the medical removal protection provided under WAC 296-850-160;

(viii) The contents of the standard; and

(ix) The employee's right of access to records under chapter 296-802 WAC, Employee medical and exposure records.

(c) When a workplace change (such as modification of equipment, tasks, or procedures) results in new or increased airborne exposure that exceeds, or can reasonably be expected to exceed, either the TWA PEL or the STEL, the employer must provide additional training to those employees affected by the change in airborne exposure.

(d) Employee information. The employer must make a copy of this rule and its appendices readily available at no cost to each employee and designated employee representative(s).

WAC 296-850-170Recordkeeping.

(1) Air monitoring data.

(a) The employer must make and maintain a record of all exposure measurements taken to assess airborne exposure as prescribed in WAC 296-850-115 Exposure assessment.

(b) This record must include at least the following information:

(i) The date of measurement for each sample taken;

(ii) The task that is being monitored;

(iii) The sampling and analytical methods used and evidence of their accuracy;

(iv) The number, duration, and results of samples taken;

(v) The type of personal protective clothing and equipment, including respirators, worn by monitored employees at the time of monitoring; and

(vi) The name, Social Security number, and job classification of each employee represented by the monitoring, indicating which employees were actually monitored.

(c) The employer 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) Where an employer uses objective data to satisfy the exposure assessment requirements under WAC 296-850-115, the employer must make and maintain a record of the objective data relied upon.

(b) This record must include at least the following information:

(i) The data relied upon;

(ii) The beryllium-containing material in question;

(iii) The source of the objective data;

(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 airborne exposure on which the objective data were based.

(c) The employer 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) The employer must make and maintain a record for each employee covered by medical surveillance under WAC 296-850-155.

(b) The record must include the following information about each employee:

(i) Name, Social Security number, and job classification;

(ii) A copy of all licensed physicians' written medical opinions for each employee; and

(iii) A copy of the information provided to the PLHCP as required by WAC 296-850-155(4).

(c) The employer must ensure that medical records are maintained and made available in accordance with chapter 296-802 WAC, Employee medical and exposure records.

(4) Training.

(a) At the completion of any training required by this standard, the employer must prepare a record that indicates the name, Social Security number, and job classification of each employee trained, the date the training was completed, and the topic of the training.

(b) This record must be maintained for three years after the completion of training.

(5) Access to records. The employer shall ensure records are maintained and made available in accordance with chapter 296-802 WAC, Employee medical and exposure records.

(6) Transfer of records. The employer must comply with the requirements involving transfer of records set forth in chapter 296-802 WAC, Employee medical and exposure records.

WAC 296-850-175Dates.

(1) Effective date. This standard shall become effective December 12, 2018.

(2) Compliance dates. All obligations of this standard commence and become enforceable on December 12, 2018, except:

(a) Change rooms and showers required by WAC 296-850-145 of this standard must be provided by March 11, 2019; and

(b) Engineering controls required by WAC 296-850-130 Methods of compliance, of this rule must be implemented by March 10, 2020.

WAC 296-850-180Appendix A—Control strategies to minimize beryllium exposure of this standard is nonmandatory.

WAC 296-850-130(2) of this chapter requires employers to use one or more of the control methods listed in WAC 296-850-130(2) to minimize worker exposure in each operation in a beryllium work area, unless the operation is exempt under WAC 296-850-130 (2)(b). This appendix sets forth a nonexhaustive list of control options that employers could use to comply with WAC 296-850-130(2) for a number of specific beryllium operations.

Table A.1: Exposure Control Recommendations


Operation	Minimal Control Strategy*	Application Group
Beryllium Oxide Forming (e.g., pressing, extruding)	For pressing operations: (1) Install local exhaust ventilation (LEV) on oxide press tables, oxide feed drum breaks, press tumblers, powder rollers, and die set disassembly stations; (2) Enclose the oxide presses; and (3) Install mechanical ventilation (make-up air) in processing areas. For extruding operations: (1) Install LEV on extruder powder loading hoods, oxide supply bottles, rod breaking operations, centerless grinders, rod laydown tables, dicing operations, surface grinders, discharge end of extrusion presses; (2) Enclose the centerless grinders; and (3) Install mechanical ventilation (make-up air) in processing areas.	Primary Beryllium Production; Beryllium Oxide Ceramics and Composites
Chemical Processing Operations (e.g., leaching, pickling, degreasing, etching, plating)	For medium and high gassing operations: (1) Perform operation with a hood having a maximum of one open side; and (2) Design process so as to minimize spills; if accidental spills occur, perform immediate cleanup.	Primary Beryllium Production; Beryllium Oxide Ceramics and Composites; Copper Rolling, Drawing and Extruding
Finishing (e.g., grinding, sanding, polishing, deburring)	(1) Perform portable finishing operations in a ventilated hood. The hood should include both downdraft and backdraft ventilation, and have at least two sides and a top. (2) Perform stationary finishing operations using a ventilated and enclosed hood at the point of operation. The grinding wheel of the stationary unit should be enclosed and ventilated.	Secondary Smelting; Fabrication of Beryllium Alloy Products; Dental Labs
Furnace Operations (e.g., Melting and Casting)	(1) Use LEV on furnaces, pelletizer; arc furnace ingot machine discharge; pellet sampling; arc furnace bins and conveyors; beryllium hydroxide drum dumper and dryer; furnace rebuilding; furnace tool holders; arc furnace tundish and tundish skimming, tundish preheat hood, and tundish cleaning hoods; dross handling equipment and drums; dross recycling; and tool repair station, charge make-up station, oxide screener, product sampling locations, drum changing stations, and drum cleaning stations. (2) Use mechanical ventilation (make-up air) in furnace building.	Primary Beryllium Production; Beryllium Oxide Ceramics and Composites; Nonferrous Foundries; Secondary Smelting
Machining	Use: (1) LEV consistent with ACGIH® ventilation guidelines on deburring hoods, wet surface grinder enclosures, belt sanding hoods, and electrical discharge machines (for operations such as polishing, lapping, and buffing); (2) High velocity low volume hoods or ventilated enclosures on lathes, vertical mills, CNC mills, and tool grinding operations; (3) For beryllium oxide ceramics, LEV on lapping, dicing, and laser cutting; and (4) Wet methods (e.g., coolants).	Primary Beryllium Production; Beryllium Oxide Ceramics and Composites; Copper Rolling, Drawing, and Extruding; Precision Turned Products
Mechanical Processing (e.g., material handling (including scrap), sorting, crushing, screening, pulverizing, shredding, pouring, mixing, blending)	(1) Enclose and ventilate sources of emission; (2) Prohibit open handling of materials; and (3) Use mechanical ventilation (make-up air) in processing areas.	Primary Beryllium Production; Beryllium Oxide Ceramics and Composites; Aluminum and Copper Foundries; Secondary Smelting
Metal Forming (e.g., rolling, drawing, straightening, annealing, extruding)	(1) For rolling operations, install LEV on mill stands and reels such that a hood extends the length of the mill; (2) For point and chamfer operations, install LEV hoods at both ends of the rod; (3) For annealing operations, provide an inert atmosphere for annealing furnaces, and LEV hoods at entry and exit points; (4) For swaging operations, install LEV on the cutting head; (5) For drawing, straightening, and extruding operations, install LEV at entry and exit points; and (6) For all metal forming operations, install mechanical ventilation (make-up air) for processing areas.	Primary Beryllium Production; Copper Rolling, Drawing, and Extruding; Fabrication of Beryllium Alloy Products
Welding	For fixed welding operations: (1) Enclose work locations around the source of fume generation and use local exhaust ventilation; and (2) Install close capture hood enclosure designed so as to minimize fume emission from the enclosure welding operation. For manual operations: (1) Use portable local exhaust and general ventilation.	Primary Beryllium Production; Fabrication of Beryllium Alloy Products; Welding


*	All LEV specifications should be in accordance with the ACGIH® Publication No. 2094, "Industrial Ventilation – A Manual of Recommended Practice" wherever applicable.

WAC 296-850-190Appendix B—Considerations when using the blood beryllium lymphocyte proliferation test in the screening and evaluation of beryllium sensitization—Nonmandatory.

Purpose:

The purpose of this appendix is to provide medical information and recommendations to aid physicians and other licensed health care professionals (PLHCPs) regarding compliance with the medical surveillance provisions of the beryllium standard. Appendix B is for informational and guidance purposes only and none of the statements in Appendix B should be construed as imposing a mandatory requirement on employers that is not otherwise imposed by the beryllium standard (chapter 296-850 WAC, Beryllium). The complete medical surveillance requirements for examinations and procedures under this chapter are described in WAC 296-850-155.

Chronic Beryllium Disease and Beryllium Sensitization:

Chronic beryllium disease (CBD) is a chronic granulomatous (inflammatory) disease primarily of the lung, caused by exposure to beryllium that meets the diagnostic criteria published in the Department of Labor and Industries Clinical Guideline for the Diagnosis of Beryllium Sensitization and Chronic Beryllium Disease. Some patients diagnosed with CBD remain free of symptoms following diagnosis, while others develop progressive worsening of clinically significant disease. (Balmes et al. 2014. Page e54) "Medical therapy of CBD is directed at suppressing the immune response to beryllium and subsequent granuloma formation and fibrosis." (Ibid)

Summarizing their review of the development of beryllium sensitization, the Federal Occupational Safety and Health Administration (OSHA) described how the immune systems of sensitized workers have been activated to react to beryllium exposures such that subsequent exposure to beryllium can progress to serious lung disease. (OSHA 2017, page 2492) According to this rule, sensitized workers are considered to be confirmed positive if supported by two abnormal BeLPT test results, an abnormal and a borderline test result, or three borderline test results, or any cases confirmed by the criteria published in the Department of Labor and Industries Clinical Guideline for the Diagnosis of Beryllium Sensitization and Chronic Beryllium Disease. It also means the result of a more reliable and accurate test indicating a person has been identified as having beryllium sensitization.

It is prudent to remove sensitized workers from further exposure to beryllium. (Balmes et al. 2014; OSHA 2017)

Additional information regarding beryllium sensitization and chronic beryllium disease are included in the Department of Labor and Industries Clinical Guideline for the Diagnosis of Beryllium Sensitization and Chronic Beryllium Disease, which may be requested from the department.

The Beryllium Lymphocyte Proliferation Test:

The beryllium lymphocyte proliferation test is performed by taking lymphocytes from either bronchoalveolar lavage fluid (the BAL BeLPT) or peripheral blood (the blood BeLPT), culturing them in vitro, and exposing them to beryllium sulfate to stimulate lymphocyte proliferation. The observation of beryllium-specific proliferation indicates beryllium sensitization.

While test results from either the blood BeLPT or the BAL BeLPT can be used to confirm sensitization to beryllium, (L&I Clinical Beryllium Guideline) it is the blood BeLPT that is typically used when screening for beryllium sensitization. Abnormal and borderline test results are considered "other than normal" in that they form the basis for diagnosing beryllium sensitization according to the diagnostic criteria used by this rule. Under these diagnostic criteria, no single blood BeLPT result can be used to diagnose beryllium sensitization.

The sensitivity of the BeLPT refers to its ability to correctly yield an other than normal result (i.e., abnormal or borderline) in those who are truly sensitized to beryllium. The specificity of the test refers to its ability to correctly yield a normal result in those who are not sensitized to beryllium.

Per Stange et al. (2004) and Middleton et al. (2006), for a single blood BeLPT the sensitivity is 0.723, and the specificity is 0.9737.

Abnormal or borderline results in workers who are in fact not sensitized to beryllium are considered false positives. Normal results in workers who are truly sensitized to beryllium are considered false negatives.

The diagnostic criteria for confirmed positive beryllium sensitization used by this rule requires any single abnormal or borderline blood BeLPT result be confirmed, which reduces the risk of unsensitized workers being falsely labeled as sensitized by false positive results of the blood BeLPT.

With a sensitivity of 0.723, a single blood BeLPT would be expected to falsely yield a negative result in nearly thirty percent of truly sensitized workers who undergo the test. Testing algorithms have been published that use multiple blood BeLPTs to reduce false negative results while continuing to control the risk of false positives. (Middleton et al. 2006, L&I Clinical Beryllium Guideline)

Thus, by controlling the sequence and number of blood BeLPTs he or she orders, the ordering provider exerts significant control over the risk that workers who are truly sensitized to beryllium could be falsely labeled as unsensitized due to false negative results of the blood BeLPT. The following is designed to provide information to assist the ordering provider who tailors these decisions to the needs of the population and individuals being tested.

These published testing algorithms reduce the risk of false negatives by using split-sample blood beryllium lymphocyte proliferation testing, which is the measurement of blood lymphocyte proliferation in two laboratory tests when a single sample of blood is split into two samples and sent to two independent laboratories, whereupon the lymphocytes are challenged with a soluble beryllium salt and two results returned. (Welch et al. 2004; Middleton et al. 2006; Balmes et al. 2014, OSHA 2017)

The highest sensitivity for performing beryllium sensitization testing using the blood BeLPT (86%) described in NIOSH beryllium rulemaking testimony (NIOSH page 32) relies upon a testing algorithm that requires either one or two rounds of testing, where split-sample blood BeLPTs are performed at each round. Thus, a minimum of two initial blood BeLPTs are obtained from independent laboratories in this testing algorithm, followed if needed by a second simultaneously-obtained pair. (Middleton et al. 2006)

An alternative algorithm with a lower sensitivity (65.7%) uses a single blood BeLPT for the initial round of testing. If the initial result is abnormal or borderline, this triggers a second round of testing with a split-sample blood BeLPT. (Ibid)

Round two split-sample testing:

Although not required by this rule, providers should consider the advantages of using split-sample testing for the second round of blood BeLPT testing, compared to single-sample testing:

• If only a single blood BeLPT is performed during a second round of testing, nearly thirty percent of truly sensitized workers would be expected to have a false negative test result and additional evaluation recommended.

• Split-sample testing for the second round decreases the risk of such false-negative results

• Based on published blood BeLPT performance characteristics (Stange et al. 2004; Middleton et al. 2006) false negative tests are more common than false positives (unless beryllium sensitization is sufficiently rare in the screened population.)

• For some result patterns, split-sample testing may be a faster way to arrive at a sensitization determination, which may be particularly relevant for workers who are receiving medical removal protection benefits while the diagnostic evaluation proceeds

• The risk of false-positives is low with either algorithm that uses split-sample testing (Middleton et al. 2006)

Per WAC 296-850-155 (3)(b)(v) and (vii), employers must make split-sample testing available to workers if requested by the provider who is determining whether an employee is sensitized to beryllium. In addition, WAC 296-850-155 (3)(b)(v) and (vii) requires employers to make multiple rounds of blood BeLPT testing available if requested by the provider. Providers need not cease testing if an initial abnormal or borderline result is followed by single- instead of split-sample testing and a single negative blood BeLPT results, for example.

Per WAC 296-850-155 (5)(c) and (6)(c) providers may at any time choose to refer workers to their choice of either a chronic beryllium disease diagnostic center that is mutually agreed upon by the employer and the employee, or to a facility recognized by the department as a center for research and clinical assessment of chemically related illness (see RCW 51.32.360).

Round one split-sample testing:

Although not required by this rule, providers should also consider circumstances under which split-sample testing at the time of the initial evaluation may be advantageous:

• This achieves the highest sensitivity (86%) of any screening algorithm described in this appendix, while controlling the risk of false-positive test results. (Middleton et al. 2006)

• Except in populations where beryllium sensitization is sufficiently rare, this increase in sensitivity compared to performing the first round of testing with just a single blood BeLPT significantly reduces the number of false negative test results relative to the increase in false positives.

• Patient-specific considerations include the risk of loss-to-follow-up, the expected time to next screening examination, provider index of suspicion, and the consequences of sustaining ongoing exposure to beryllium in the case of a missed diagnosis.

Additional considerations:

The tests used to diagnose beryllium sensitization may have been performed at any time following exposure. (L&I Clinical Beryllium Guideline) Thus, there may be a need to gather additional records of tests that have yielded abnormal or borderline results, but that may not be in the possession of the employer or provided to the provider at the start of the screening examination.

Diagnostic criteria used in the rule anticipate the possibility of false-negative testing: If deemed appropriate, sensitization can be confirmed by bronchoalveolar lavage BeLPT (BAL BeLPT). (L&I Clinical Beryllium Guideline)

Diagnosing chronic beryllium disease using the secondary diagnostic pathway requires all criteria be met and requires the performance of both the blood BeLPT and BAL BeLPT (unless medically contraindicated), but does not require sensitization be confirmed as described in the primary diagnostic pathway. (L&I Clinical Beryllium Guideline)

Concluding recommendations:

Providers should consider providing split-sample blood BeLPTs in nearly all circumstances where round two testing is indicated or required.

Providers should consider whether patient- and population-based considerations warrant using split-sample testing for the first round of blood BeLPT testing.

References:

Balmes, J.R., et al. An official American Thoracic Society statement: diagnosis and management of beryllium sensitivity and chronic beryllium disease. Am J Respir Crit Care Med, 2014. 190(10): p. e34-59.

Beryllium hearing exhibit 005: National Institute for Occupational Safety and Health (NIOSH) Testimony. Docket No. OSHA-H005C-2006-0870-1725.

The Clinical Guideline for the Diagnosis of Beryllium Sensitization and Chronic Beryllium Disease, as published by the Washington State Department of Labor and Industries.

Department of Labor: Occupational Safety and Health Administration (OSHA). Occupational Exposure to Beryllium. Federal Register. Vol. 82, No. 5. Monday, January 9, 2017. Rules and Regulations. Docket No. OSHA-H005C-2006-0870.

Middleton, D.C., et al. The BeLPT: algorithms and implications. Am J Ind Med, 2006. 49(1): p. 36-44.

Stange, A.W., F.J. Furman, and D.E. Hilmas. The beryllium lymphocyte proliferation test: Relevant issues in beryllium health surveillance. Am J Ind Med, 2004. 46(5): p. 453-62. Middleton et al. 2006.

Welch, L., et al. Screening for Beryllium Disease Among Construction Trade Workers at Department of Energy Nuclear Sites. Am J Ind Med, 2004. 46:207-218.