Original Notice.

     Preproposal statement of inquiry was filed as WSR 05-09-061.

     Title of Rule and Other Identifying Information: Chapter 296-856 WAC, Formaldehyde; chapter 296-62 WAC, General occupational health standards; WAC 296-155-160 Gases, vapors, fumes, dusts, and mists; 296-307-56045 Label containers of hazardous chemicals; 296-307-62625 Permissible exposure limits of air contaminants; 296-307-624 Scope; 296-839-40005 Label containers of hazardous chemicals; and 296-841-100 Scope.

     The Department of Labor and Industries is proposing to rewrite and clarify requirements relating to formaldehyde. This rule making is part of our clear rule-writing initiative to rewrite all of our general occupational safety and health rules for clarity. This proposal will move the formaldehyde requirements from chapter 296-62 WAC to new chapter 296-856 WAC, Formaldehyde.

AMENDED SECTIONS:

WAC 296-62-07540 Formaldehyde.

•     The requirements from this section are moved to chapter 296-856 WAC, Formaldehyde.

•     A note is added to clarify that the requirements in this WAC section apply only to agriculture.

WAC 296-155-160 Gases, vapors, fumes, dusts, and mists.

•     Update a reference.

WAC 296-307-56045 Label containers of hazardous chemicals.

•     Update a reference.

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

•     Update a reference.

WAC 296-307-624 Scope.

•     Update a reference.

WAC 296-839-40005 Label containers of hazardous chemicals.

•     Update a reference.

WAC 296-841-100 Scope.

•     Update a reference.

NEW SECTIONS:

WAC 296-856-100 Scope.

•     Added language to this section relating to what this chapter covers.

WAC 296-856-200 Basic rules, section contents.

•     This section gives a brief employer responsibility statement and includes a short table of contents of the sections located in this 3-digit WAC number.

WAC 296-856-20010 Preventive practices.

•     This section requires that hazards are properly communicated and containers are properly labeled for any known or potential hazards.

•     The requirements in this section are currently located in WAC 296-62-07540. No requirements have been added.

WAC 296-856-20020 Training.

•     This section requires that employees are provided training and information regarding exposures to formaldehyde.

•     The requirements in this section are currently located in WAC 296-62-07540. No requirements have been added.

WAC 296-856-20030 Personal protective equipment (PPE).

•     This section requires that employees are provided proper PPE and protection in areas where formaldehyde exposure could occur, at no cost to the employee.

•     The requirements in this section are currently located in WAC 296-62-07540. No requirements have been added.

WAC 296-856-20040 Employee protective measures.

•     This section requires implementation of appropriate measures for employees performing activities with exposure to airborne formaldehyde.

•     The requirements in this section are currently located in WAC 296-62-07540. No requirements have been added.

WAC 296-856-20050 Exposure evaluations.

•     This section requires the employer to conduct an employee exposure evaluation to accurately determine airborne concentrations of formaldehyde in the workplace.

•     The requirements in this section are currently located in WAC 296-62-07540. No requirements have been added.

WAC 296-856-20060 Notification.

•     This section requires the employer to provide written exposure monitoring results to the employees within five business days after an exposure evaluation. Notification requirements in the current rule is fifteen days. This change is consistent with notification times in other substance specific hygiene rules.

•     No requirements have been added.

WAC 296-856-20070 Exposure records.

•     This section requires the employer to keep complete and accurate records for all exposure monitoring related to formaldehyde.

•     The requirements in this section are currently located in WAC 296-62-07540. No requirements have been added.

WAC 296-856-300 Exposure and medical monitoring.

•     This section gives a brief employer responsibility statement and includes a short table of contents of the sections located in this 3-digit WAC number.

WAC 296-856-30010 Periodic exposure evaluations.

•     This section requires the employer to obtain employee exposure monitoring results as specified in Table 2, Periodic exposure evaluation frequencies, in this section.

•     The requirements in this section are currently located in WAC 296-62-07540. No requirements have been added.

WAC 296-856-30020 Medical and emergency evaluations.

•     This section requires that medical and emergency evaluations and examinations be provided to employees exposed to formaldehyde.

•     The requirements in this section are currently located in WAC 296-62-07540. No requirements have been added.

WAC 296-856-30030 Medical removal.

•     This section requires removal of employees who report signs or symptoms of formaldehyde exposure.

•     The requirements in this section are currently located in WAC 296-62-07540. No requirements have been added.

WAC 296-857-30040 Multiple LHCP review.

•     This section requires that employees are notified that they may seek second and third opinions from a licensed health care professional

•     The requirements in this section are currently located in WAC 296-62-07540. No requirements have been added.

WAC 296-856-30050 Medical records.

•     This section requires the employer to establish and maintain complete and accurate medical records for each employee receiving a medical evaluation for formaldehyde.

•     The requirements in this section are currently located in WAC 296-62-07540. No requirements have been added.

WAC 296-856-400 Exposure control areas.

•     This section gives a brief employer responsibility statement and includes a short table of contents of the sections located in this 3-digit WAC number.

WAC 296-856-40010 Exposure controls.

•     This section requires the use of exposure controls to reduce employee exposures to formaldehyde concentration levels below the permissible exposure limit (PEL).

•     The requirements in this section are currently located in WAC 296-62-07540. No requirements have been added.

WAC 296-856-40020 Establishing exposure control areas.

•     This section requires the employer to establish temporary or permanent exposure control areas where airborne concentrations of formaldehyde are above the short-term exposure limit (STEL) or eight-hour time weighted average.

•     The requirements in this section are currently located in WAC 296-62-07540. No requirements have been added.

WAC 296-856-40030 Respirators.

•     This section requires that employees use respirator protection in exposure control areas. This section also requires that air-purifying chemical cartridges are replaced according to the manufacturers change-out schedules.

•     The requirements in this section are currently located in WAC 296-62-07540. No requirements have been added.

     Hearing Location(s): Department of Labor and Industries Building, 7273 Linderson Way S.W., Room S117, Tumwater, WA 98501, on January 9, 2006, at 1:30 p.m.

     Date of Intended Adoption: April 4, 2006.

     Submit Written Comments to: Carol Stevenson, P.O. Box 44635, Olympia, WA 98504-4635, e-mail stei235@lni.wa.gov, fax (360) 902-5529, by January 17, 2006.

     Assistance for Persons with Disabilities: Contact Kimberly Johnson, (360) 902-5008, e-mail rhok235@lni.wa.gov by December 15, 2005.

     Purpose of the Proposal and Its Anticipated Effects, Including Any Changes in Existing Rules: The formaldehyde rules, in chapter 296-62 WAC, contain requirements relating to formaldehyde. These requirements will be rewritten and moved into chapter 296-856 WAC, Formaldehyde.

     Chapter 296-841 WAC, Respiratory hazards, requires that employees be notified of exposure results over the PEL within five days to meet the requirements of RCW 49-17-220 [49.17.220] for "prompt" notification. The chapter further specifies that notification for specific rules be "In writing, as specified in the rule specific to the substance." The requirement in the formaldehyde rule, proposed chapter 296-856 WAC, will require employers to notify employees of monitoring results within five days of receiving the results. Currently, the employers are required to provide notification within fifteen days. This requirement has been changed to be consistent with the notification times for substance-specific hygiene rules.

     There are no anticipated effects of this rule making.

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

     Statute Being Implemented: Chapter 49.17 RCW.

     Rule is not necessitated by federal law, federal or state court decision.

     Name of Proponent: Department of Labor and Industries, governmental.

     Name of Agency Personnel Responsible for Drafting: Tracy Spencer, Tumwater, (360) 902-5530; Implementation and Enforcement: Stephen Cant, Tumwater, (360) 902-5495.

     No small business economic impact statement has been prepared under chapter 19.85 RCW. RCW 19.85.030 (1)(a) requires a small business economic impact statement (SBEIS) only when a rule will "impose more than a minor cost on businesses in an industry." An analysis of the proposed rule reveals that in addition to not imposing new costs on businesses, these revisions will make WISHA rules easier for employers and employees to understand and use, and thus save time and resources. Therefore, no SBEIS is required.

     A cost-benefit analysis is not required under RCW 34.05.328. There are no costs to assess within these rule amendments. The amendments would require employers to provide notification of exposure evaluation results to employees within five days. Currently, employers are required to provide this information within fifteen days. This amendment will require employers to provide data that they already have, to employees quicker, and will not require additional costs. This amendment is consistent with notification times for substance-specific hygiene rules. The department determined the proposed changes do not require a cost-benefit analysis because the costs associated with the proposed changes are exempted by the law since they are clarifying the rule for ease of use and understanding. (See RCW 19.85.025 referencing RCW 34.05.310 (4)(d).)

November 22, 2005

Gary Weeks

Director

OTS-8459.1

AMENDATORY SECTION(Amending WSR 05-03-093, filed 1/18/05, effective 3/1/05)

WAC 296-62-07540   Formaldehyde.  

Note:

The requirements in this chapter apply only to agriculture. The general industry requirements relating to formaldehyde have been moved to chapter 296-856 WAC, Formaldehyde.

     (1) Scope and application. This standard applies to all occupational exposures to formaldehyde, i.e., from formaldehyde gas, its solutions, and materials that release formaldehyde.

     (2) Definitions. For purposes of this standard, the following definitions shall apply:

     (a) "Action level" means a concentration of 0.5 part formaldehyde per million parts of air (0.5 ppm) calculated as an 8-hour time-weighted average (TWA) concentration.

     (b) "Approved" means approved by the director of the department of labor and industries or his/her authorized representative: Provided, however, That should a provision of this chapter state that approval by an agency or organization other than the department of labor and industries is required, such as Underwriters' Laboratories or the Mine Safety and Health Administration and the National Institute for Occupational Safety and Health, the provision of WAC 296-800-370 shall apply.

     (c) "Authorized person" means any person required by work duties to be present in regulated work areas, or authorized to do so by the employer, by this section of the standard, or by the WISHA Act.

     (d) "Director" means the director of the department of labor and industries, or his/her designated representative.

     (e) "Emergency" is any occurrence, such as but not limited to equipment failure, rupture of containers, or failure of control equipment that results in an uncontrolled release of a significant amount of formaldehyde.

     (f) "Employee exposure" means the exposure to airborne formaldehyde which would occur without corrections for protection provided by any respirator that is in use.

     (g) "Formaldehyde" means the chemical substance, HCHO, Chemical Abstracts Service Registry No. 50-00-0.

     (3) Permissible exposure limit (PEL).

     (a) TWA: The employer shall assure that no employee is exposed to an airborne concentration of formaldehyde which exceeds 0.75 part formaldehyde per million parts of air as an 8-hour TWA.

     (b) Short term exposure limit (STEL): The employer shall assure that no employee is exposed to an airborne concentration of formaldehyde which exceeds two parts formaldehyde per million parts of air (2 ppm) as a fifteen-minute STEL.

     (4) Exposure monitoring.

     (a) General.

     (i) Each employer who has a workplace covered by this standard shall monitor employees to determine their exposure to formaldehyde.

     (ii) Exception. Where the employer documents, using objective data, that the presence of formaldehyde or formaldehyde-releasing products in the workplace cannot result in airborne concentrations of formaldehyde that would cause any employee to be exposed at or above the action level or the STEL under foreseeable conditions of use, the employer will not be required to measure employee exposure to formaldehyde.

     (iii) When an employee's exposure is determined from representative sampling, the measurements used shall be representative of the employee's full shift or short-term exposure to formaldehyde, as appropriate.

     (iv) Representative samples for each job classification in each work area shall be taken for each shift unless the employer can document with objective data that exposure levels for a given job classification are equivalent for different workshifts.

     (b) Initial monitoring. The employer shall identify all employees who may be exposed at or above the action level or at or above the STEL and accurately determine the exposure of each employee so identified.

     (i) Unless the employer chooses to measure the exposure of each employee potentially exposed to formaldehyde, the employer shall develop a representative sampling strategy and measure sufficient exposures within each job classification for each workshift to correctly characterize and not underestimate the exposure of any employee within each exposure group.

     (ii) The initial monitoring process shall be repeated each time there is a change in production, equipment, process, personnel, or control measures which may result in new or additional exposure to formaldehyde.

     (iii) If the employer receives reports or signs or symptoms of respiratory or dermal conditions associated with formaldehyde exposure, the employer shall promptly monitor the affected employee's exposure.

     (c) Periodic monitoring.

     (i) The employer shall periodically measure and accurately determine exposure to formaldehyde for employees shown by the initial monitoring to be exposed at or above the action level or at or above the STEL.

     (ii) If the last monitoring results reveal employee exposure at or above the action level, the employer shall repeat monitoring of the employees at least every six months.

     (iii) If the last monitoring results reveal employee exposure at or above the STEL, the employer shall repeat monitoring of the employees at least once a year under worst conditions.

     (d) Termination of monitoring. The employer may discontinue periodic monitoring for employees if results from two consecutive sampling periods taken at least seven days apart show that employee exposure is below the action level and the STEL. The results must be statistically representative and consistent with the employer's knowledge of the job and work operation.

     (e) Accuracy of monitoring. Monitoring shall be accurate, at the ninety-five percent confidence level, to within plus or minus twenty-five percent for airborne concentrations of formaldehyde at the TWA and the STEL and to within plus or minus thirty-five percent for airborne concentrations of formaldehyde at the action level.

     (f) Employee notification of monitoring results. Within fifteen days of receiving the results of exposure monitoring conducted under this standard, the employer shall notify the affected employees of these results. Notification shall be in writing, either by distributing copies of the results to the employees or by posting the results. If the employee exposure is over either PEL, the employer shall develop and implement a written plan to reduce employee exposure to or below both PELs, and give written notice to employees. The written notice shall contain a description of the corrective action being taken by the employer to decrease exposure.

     (g) Observation of monitoring.

     (i) The employer shall provide affected employees or their designated representatives an opportunity to observe any monitoring of employee exposure to formaldehyde required by this standard.

     (ii) When observation of the monitoring of employee exposure to formaldehyde requires entry into an area where the use of protective clothing or equipment is required, the employer shall provide the clothing and equipment to the observer, require the observer to use such clothing and equipment, and assure that the observer complies with all other applicable safety and health procedures.

     (5) Regulated areas.

     (a) The employer shall establish regulated areas where the concentration of airborne formaldehyde exceeds either the TWA or the STEL and post all entrances and accessways with signs bearing the following information:

     (c) An employer at a multiemployer worksite who establishes a regulated area shall communicate the access restrictions and locations of these areas to other employers with work operations at that worksite.

     (6) Methods of compliance.

     (a) Engineering controls and work practices. The employer shall institute engineering and work practice controls to reduce and maintain employee exposures to formaldehyde at or below the TWA and the STEL.

     (b) Exception. Whenever the employer has established that feasible engineering and work practice controls cannot reduce employee exposure to or below either of the PELs, the employer shall apply these controls to reduce employee exposures to the extent feasible and shall supplement them with respirators which satisfy this standard.

     (7) Respiratory protection.

     (a) General. For employees who use respirators required by this section, the employer must provide respirators that comply with the requirements of this subsection. Respirators must be used during:

     (i) Periods necessary to install or implement feasible engineering and work-practice controls;

     (ii) Work operations, such as maintenance and repair activities or vessel cleaning, for which the employer establishes that engineering and work-practice controls are not feasible;

     (iii) Work operations for which feasible engineering and work-practice controls are not yet sufficient to reduce exposure to or below the PELs;

     (iv) Emergencies.

     (b) Respirator program.

     (i) The employer must implement a respiratory protection program as required by chapter 296-842 WAC, except WAC 296-842-13005 and 296-842-14005.

     (ii) If air-purifying chemical-cartridge respirators are used, the employer must:

     (A) Replace the cartridge after three hours of use or at the end of the workshift, whichever occurs first, unless the cartridge contains a NIOSH-certified end-of-service-life indicator (ESLI) to show when breakthrough occurs.

     (B) Unless the canister contains a NIOSH-certified ESLI to show when breakthrough occurs, replace canisters used in atmospheres up to 7.5 ppm (10 x PEL) every four hours and industrial-sized canisters used in atmospheres up to 75 ppm (100 x PEL) every two hours, or at the end of the workshift, whichever occurs first.

     (c) Respirator selection.

     (i) The employer must select appropriate respirators from Table 1 of this section.

TABLE 1
MINIMUM REQUIREMENTS FOR RESPIRATORY PROTECTION AGAINST FORMALDEHYDE

Condition of use or formaldehyde concentration (ppm)	Minimum respirator required1
Up to 7.5 ppm (10 x PEL) . . . . . . . . . . . .	Full facepiece with cartridges or canisters specifically approved for protection against formaldehyde2.
Up to 75 ppm (100 x PEL) . . . . . . . . . . . .	Full-face mask with chin style or chest or back mounted type industrial size canister specifically approved for protection against formaldehyde.
	Type C supplied-air respirator pressure demand or continuous flow type, with full facepiece, hood, or helmet.
Above 75 ppm or unknown (emergencies) (100 x PEL) . . . . . . . . . . . .	Self-contained breathing apparatus (SCBA) with positive-pressure full facepiece.
	Combination supplied-air, full facepiece positive-pressure respirator with auxiliary self-contained air supply.
Fire fighting . . . . . . . . . . . .	SCBA with positive-pressure in full facepiece.
Escape . . . . . . . . . . . .	SCBA in demand or pressure demand mode.
	Full-face mask with chin style or front or back mounted type industrial size canister specifically approved for protection against formaldehyde.

1	Respirators specified for use at higher concentrations may be used at lower concentrations.
2	A half-mask respirator with cartridges specifically approved for protection against formaldehyde can be substituted for the full facepiece respirator providing that effective gas-proof goggles are provided and used in combination with the half-mask respirator.

     (ii) The employer must provide a powered air-purifying respirator adequate to protect against formaldehyde exposure to any employee who has difficulty using a negative-pressure respirator.

     (8) Protective equipment and clothing. Employers shall comply with the provisions of WAC 296-800-160. When protective equipment or clothing is provided under these provisions, the employer shall provide these protective devices at no cost to the employee and assure that the employee wears them.

     (a) Selection. The employer shall select protective clothing and equipment based upon the form of formaldehyde to be encountered, the conditions of use, and the hazard to be prevented.

     (i) All contact of the eyes and skin with liquids containing one percent or more formaldehyde shall be prevented by the use of chemical protective clothing made of material impervious to formaldehyde and the use of other personal protective equipment, such as goggles and face shields, as appropriate to the operation.

     (ii) Contact with irritating or sensitizing materials shall be prevented to the extent necessary to eliminate the hazard.

     (iii) Where a face shield is worn, chemical safety goggles are also required if there is a danger of formaldehyde reaching the area of the eye.

     (iv) Full body protection shall be worn for entry into areas where concentrations exceed 100 ppm and for emergency reentry into areas of unknown concentration.

     (b) Maintenance of protective equipment and clothing.

     (i) The employer shall assure that protective equipment and clothing that has become contaminated with formaldehyde is cleaned or laundered before its reuse.

     (ii) When ventilating formaldehyde-contaminated clothing and equipment, the employer shall establish a storage area so that employee exposure is minimized. Containers for contaminated clothing and equipment and storage areas shall have labels and signs containing the following information:

     (iv) The employer shall assure that no employee takes home equipment or clothing that is contaminated with formaldehyde.

     (v) The employer shall repair or replace all required protective clothing and equipment for each affected employee as necessary to assure its effectiveness.

     (vi) The employer shall inform any person who launders, cleans, or repairs such clothing or equipment of formaldehyde's potentially harmful effects and of procedures to safely handle the clothing and equipment.

     (9) Hygiene protection.

     (a) The employer shall provide change rooms, as described in WAC 296-24-120 for employees who are required to change from work clothing into protective clothing to prevent skin contact with formaldehyde.

     (b) If employees' skin may become splashed with solutions containing one percent or greater formaldehyde, for example because of equipment failure or improper work practices, the employer shall provide conveniently located quick drench showers and assure that affected employees use these facilities immediately.

     (c) If there is any possibility that an employee's eyes may be splashed with solutions containing 0.1 percent or greater formaldehyde, the employer shall provide acceptable eyewash facilities within the immediate work area for emergency use.

     (10) Housekeeping. For operations involving formaldehyde liquids or gas, the employer shall conduct a program to detect leaks and spills, including regular visual inspections.

     (a) Preventative maintenance of equipment, including surveys for leaks, shall be undertaken at regular intervals.

     (b) In work areas where spillage may occur, the employer shall make provisions to contain the spill, to decontaminate the work area, and to dispose of the waste.

     (c) The employer shall assure that all leaks are repaired and spills are cleaned promptly by employees wearing suitable protective equipment and trained in proper methods for cleanup and decontamination.

     (d) Formaldehyde-contaminated waste and debris resulting from leaks or spills shall be placed for disposal in sealed containers bearing a label warning of formaldehyde's presence and of the hazards associated with formaldehyde.

     (11) Emergencies. For each workplace where there is the possibility of an emergency involving formaldehyde, the employer shall assure appropriate procedures are adopted to minimize injury and loss of life. Appropriate procedures shall be implemented in the event of an emergency.

     (12) Medical surveillance.

     (a) Employees covered.

     (i) The employer shall institute medical surveillance programs for all employees exposed to formaldehyde at concentrations at or exceeding the action level or exceeding the STEL.

     (ii) The employer shall make medical surveillance available for employees who develop signs and symptoms of overexposure to formaldehyde and for all employees exposed to formaldehyde in emergencies. When determining whether an employee may be experiencing signs and symptoms of possible overexposure to formaldehyde, the employer may rely on the evidence that signs and symptoms associated with formaldehyde exposure will occur only in exceptional circumstances when airborne exposure is less than 0.1 ppm and when formaldehyde is present in materials in concentrations less than 0.1 percent.

     (b) Examination by a physician. All medical procedures, including administration of medical disease questionnaires, shall be performed by or under the supervision of a licensed physician and shall be provided without cost to the employee, without loss of pay, and at a reasonable time and place.

     (c) Medical disease questionnaire. The employer shall make the following medical surveillance available to employees prior to assignment to a job where formaldehyde exposure is at or above the action level or above the STEL and annually thereafter. The employer shall also make the following medical surveillance available promptly upon determining that an employee is experiencing signs and symptoms indicative of possible overexposure to formaldehyde.

     (i) Administration of a medical disease questionnaire, such as in Appendix D, which is designed to elicit information on work history, smoking history, any evidence of eye, nose, or throat irritation; chronic airway problems or hyperreactive airway disease; allergic skin conditions or dermatitis; and upper or lower respiratory problems.

     (ii) A determination by the physician, based on evaluation of the medical disease questionnaire, of whether a medical examination is necessary for employees not required to wear respirators to reduce exposure to formaldehyde.

     (d) Medical examinations. Medical examinations shall be given to any employee who the physician feels, based on information in the medical disease questionnaire, may be at increased risk from exposure to formaldehyde and at the time of initial assignment and at least annually thereafter to all employees required to wear a respirator to reduce exposure to formaldehyde. The medical examination shall include:

     (i) A physical examination with emphasis on evidence of irritation or sensitization of the skin and respiratory system, shortness of breath, or irritation of the eyes.

     (ii) Laboratory examinations for respirator wearers consisting of baseline and annual pulmonary function tests. As a minimum, these tests shall consist of forced vital capacity (FVC), forced expiratory volume in one second (FEV1), and forced expiratory flow (FEF).

     (iii) Any other test which the examining physician deems necessary to complete the written opinion.

     (iv) Counseling of employees having medical conditions that would be directly or indirectly aggravated by exposure to formaldehyde on the increased risk of impairment of their health.

     (e) Examinations for employees exposed in an emergency. The employer shall make medical examinations available as soon as possible to all employees who have been exposed to formaldehyde in an emergency.

     (i) The examination shall include a medical and work history with emphasis on any evidence of upper or lower respiratory problems, allergic conditions, skin reaction or hypersensitivity, and any evidence of eye, nose, or throat irritation.

     (ii) Other examinations shall consist of those elements considered appropriate by the examining physician.

     (f) Information provided to the physician. The employer shall provide the following information to the examining physician:

     (i) A copy of this standard and Appendices A, C, D, and E;

     (ii) A description of the affected employee's job duties as they relate to the employee's exposure to formaldehyde;

     (iii) The representative exposure level for the employee's job assignment;

     (iv) Information concerning any personal protective equipment and respiratory protection used or to be used by the employee; and

     (v) Information from previous medical examinations of the affected employee within the control of the employer.

     (vi) In the event of a nonroutine examination because of an emergency, the employer shall provide to the physician as soon as possible: A description of how the emergency occurred and the exposure the victim may have received.

     (g) Physician's written opinion.

     (i) For each examination required under this standard, the employer shall obtain a written opinion from the examining physician. This written opinion shall contain the results of the medical examination except that it shall not reveal specific findings or diagnoses unrelated to occupational exposure to formaldehyde. The written opinion shall include:

     (A) The physician's opinion as to whether the employee has any medical condition that would place the employee at an increased risk of material impairment of health from exposure to formaldehyde;

     (B) Any recommended limitations on the employee's exposure or changes in the use of personal protective equipment, including respirators;

     (C) A statement that the employee has been informed by the physician of any medical conditions which would be aggravated by exposure to formaldehyde, whether these conditions may have resulted from past formaldehyde exposure or from exposure in an emergency, and whether there is a need for further examination or treatment.

     (ii) The employer shall provide for retention of the results of the medical examination and tests conducted by the physician.

     (iii) The employer shall provide a copy of the physician's written opinion to the affected employee within fifteen days of its receipt.

     (h) Medical removal.

     (i) The provisions of this subdivision apply when an employee reports significant irritation of the mucosa of the eyes or of the upper airways, respiratory sensitization, dermal irritation, or dermal sensitization attributed to workplace formaldehyde exposure. Medical removal provisions do not apply in case of dermal irritation or dermal sensitization when the product suspected of causing the dermal condition contains less than 0.05% formaldehyde.

     (ii) An employee's report of signs or symptoms of possible overexposure to formaldehyde shall be evaluated by a physician selected by the employer pursuant to (c) of this subsection. If the physician determines that a medical examination is not necessary under (c)(ii) of this subsection, there shall be a two-week evaluation and remediation period to permit the employer to ascertain whether the signs or symptoms subside untreated or with the use of creams, gloves, first-aid treatment, or personal protective equipment. Industrial hygiene measures that limit the employee's exposure to formaldehyde may also be implemented during this period. The employee shall be referred immediately to a physician prior to expiration of the two-week period if the signs or symptoms worsen. Earnings, seniority, and benefits may not be altered during the two-week period by virtue of the report.

     (iii) If the signs or symptoms have not subsided or been remedied by the end of the two-week period, or earlier if signs or symptoms warrant, the employee shall be examined by a physician selected by the employer. The physician shall presume, absent contrary evidence, that observed dermal irritation or dermal sensitization are not attributable to formaldehyde when products to which the affected employee is exposed contain less than 0.1% formaldehyde.

     (iv) Medical examinations shall be conducted in compliance with the requirements of (e)(i) and (ii) of this subsection. Additional guidelines for conducting medical exams are contained in WAC 296-62-07546, Appendix C.

     (v) If the physician finds that significant irritation of the mucosa of the eyes or the upper airways, respiratory sensitization, dermal irritation, or dermal sensitization result from workplace formaldehyde exposure and recommends restrictions or removal. The employer shall promptly comply with the restrictions or recommendations of removal. In the event of a recommendation of removal, the employer shall remove the affected employee from the current formaldehyde exposure and if possible, transfer the employee to work having no or significantly less exposure to formaldehyde.

     (vi) When an employee is removed pursuant to item (v) of this subdivision, the employer shall transfer the employee to comparable work for which the employee is qualified or can be trained in a short period (up to six months), where the formaldehyde exposures are as low as possible, but not higher than the action level. The employer shall maintain the employee's current earnings, seniority, and other benefits. If there is no such work available, the employer shall maintain the employee's current earnings, seniority, and other benefits until such work becomes available, until the employee is determined to be unable to return to workplace formaldehyde exposure, until the employee is determined to be able to return to the original job status, or for six months, whichever comes first.

     (vii) The employer shall arrange for a follow-up medical examination to take place within six months after the employee is removed pursuant to this subsection. This examination shall determine if the employee can return to the original job status, or if the removal is to be permanent. The physician shall make a decision within six months of the date the employee was removed as to whether the employee can be returned to the original job status, or if the removal is to be permanent.

     (viii) An employer's obligation to provide earnings, seniority, and other benefits to a removed employee may be reduced to the extent that the employee receives compensation for earnings lost during the period of removal either from a publicly or employer-funded compensation program or from employment with another employer made possible by virtue of the employee's removal.

     (ix) In making determinations of the formaldehyde content of materials under this subsection the employer may rely on objective data.

     (i) Multiple physician review.

     (i) After the employer selects the initial physician who conducts any medical examination or consultation to determine whether medical removal or restriction is appropriate, the employee may designate a second physician to review any findings, determinations, or recommendations of the initial physician and to conduct such examinations, consultations, and laboratory tests as the second physician deems necessary and appropriate to evaluate the effects of formaldehyde exposure and to facilitate this review.

     (ii) The employer shall promptly notify an employee of the right to seek a second medical opinion after each occasion that an initial physician conducts a medical examination or consultation for the purpose of medical removal or restriction.

     (iii) The employer may condition its participation in, and payment for, the multiple physician review mechanism upon the employee doing the following within fifteen days after receipt of the notification of the right to seek a second medical opinion, or receipt of the initial physician's written opinion, whichever is later:

     (A) The employee informs the employer of the intention to seek a second medical opinion; and

     (B) The employee initiates steps to make an appointment with a second physician.

     (iv) If the findings, determinations, or recommendations of the second physician differ from those of the initial physician, then the employer and the employee shall assure that efforts are made for the two physicians to resolve the disagreement. If the two physicians are unable to quickly resolve their disagreement, then the employer and the employee through their respective physicians shall designate a third physician who shall be a specialist in the field at issue:

     (A) To review the findings, determinations, or recommendations of the prior physicians; and

     (B) To conduct such examinations, consultations, laboratory tests, and discussions with prior physicians as the third physician deems necessary to resolve the disagreement of the prior physicians.

     (v) In the alternative, the employer and the employee or authorized employee representative may jointly designate such third physician.

     (vi) The employer shall act consistent with the findings, determinations, and recommendations of the third physician, unless the employer and the employee reach an agreement which is otherwise consistent with the recommendations of at least one of the three physicians.

     (13) Hazard communication.

     (a) General. Notwithstanding any exemption granted in WAC 296-800-170 for wood products, each employer who has a workplace covered by this standard shall comply with the requirements of WAC 296-800-170. The definitions of the chemical hazard communication standard shall apply under this standard.

     (i) The following shall be subject to the hazard communication requirements of this section: Formaldehyde gas, all mixtures or solutions composed of greater than 0.1 percent formaldehyde, and materials capable of releasing formaldehyde into the air under reasonably foreseeable concentrations reaching or exceeding 0.1 ppm.

     (ii) As a minimum, specific health hazards that the employer shall address are: Cancer, irritation and sensitization of the skin and respiratory system, eye and throat irritation, and acute toxicity.

     (b) Manufacturers and importers who produce or import formaldehyde or formaldehyde-containing products shall provide downstream employers using or handling these products with an objective determination through the required labels and MSDSs as required by chapter 296-839 WAC.

     (c) Labels.

     (i) The employer shall assure that hazard warning labels complying with the requirements of WAC 296-800-170 are affixed to all containers of materials listed in (a)(i) of this subsection, except to the extent that (a)(i) of this subsection is inconsistent with this item.

     (ii) Information on labels. As a minimum, for all materials listed in (a)(i) of this subsection, capable of releasing formaldehyde at levels of 0.1 ppm to 0.5 ppm, labels shall identify that the product contains formaldehyde: List the name and address of the responsible party; and state that physical and health hazard information is readily available from the employer and from material safety data sheets.

     (iii) For materials listed in (a)(i) of this subsection, capable of releasing formaldehyde at levels above 0.5 ppm, labels shall appropriately address all the hazards as defined in WAC 296-800-170, and Appendices A and B, including respiratory sensitization, and shall contain the words "Potential Cancer Hazard."

     (iv) In making the determinations of anticipated levels of formaldehyde release, the employer may rely on objective data indicating the extent of potential formaldehyde release under reasonably foreseeable conditions of use.

     (v) Substitute warning labels. The employer may use warning labels required by other statutes, regulations, or ordinances which impart the same information as the warning statements required by this subitem.

     (d) Material safety data sheets.

     (i) Any employer who uses formaldehyde-containing materials listed in (a)(i) of this subsection shall comply with the requirements of WAC 296-800-170 with regard to the development and updating of material safety data sheets.

     (ii) Manufacturers, importers, and distributors of formaldehyde containing materials listed in (a)(i) of this subsection shall assure that material safety data sheets and updated information are provided to all employers purchasing such materials at the time of the initial shipment and at the time of the first shipment after a material safety data sheet is updated.

     (e) Written hazard communication program. The employer shall develop, implement, and maintain at the workplace, a written hazard communication program for formaldehyde exposures in the workplace, which at a minimum describes how the requirements specified in this section for labels and other forms of warning and material safety data sheets, and subsection (14) of this section for employee information and training, will be met. Employees in multiemployer workplaces shall comply with the requirements of WAC 296-800-170.

     (14) Employee information and training.

     (a) Participation. The employer shall assure that all employees who are assigned to workplaces where there is a health hazard from formaldehyde participate in a training program, except that where the employer can show, using objective data, that employees are not exposed to formaldehyde at or above 0.1 ppm, the employer is not required to provide training.

     (b) Frequency. Employers shall provide such information and training to employees at the time of their initial assignment and whenever a new exposure to formaldehyde is introduced into their work area. The training shall be repeated at least annually.

     (c) Training program. The training program shall be conducted in a manner which the employee is able to understand and shall include:

     (i) A discussion of the contents of this regulation and the contents of the material safety data sheet;

     (ii) The purpose for and a description of the medical surveillance program required by this standard, including:

     (A) A description of the potential health hazards associated with exposure to formaldehyde and a description of the signs and symptoms of exposure to formaldehyde.

     (B) Instructions to immediately report to the employer the development of any adverse signs or symptoms that the employee suspects is attributable to formaldehyde exposure.

     (iii) Description of operations in the work area where formaldehyde is present and an explanation of the safe work practices appropriate for limiting exposure to formaldehyde in each job;

     (iv) The purpose for, proper use of, and limitations of personal protective clothing;

     (v) Instructions for the handling of spills, emergencies, and clean-up procedures;

     (vi) An explanation of the importance of engineering and work practice controls for employee protection and any necessary instruction in the use of these controls;

     (vii) A review of emergency procedures including the specific duties or assignments of each employee in the event of an emergency; and

     (viii) The purpose, proper use, limitations, and other training requirements for respiratory protection as required by chapter 296-842 WAC.

     (d) Access to training materials.

     (i) The employer shall inform all affected employees of the location of written training materials and shall make these materials readily available, without cost, to the affected employees.

     (ii) The employer shall provide, upon request, all training materials relating to the employee training program to the director of labor and industries, or his/her designated representative.

     (15) Recordkeeping.

     (a) Exposure measurements. The employer shall establish and maintain an accurate record of all measurements taken to monitor employee exposure to formaldehyde. This record shall include:

     (i) The date of measurement;

     (ii) The operation being monitored;

     (iii) The methods of sampling and analysis and evidence of their accuracy and precision;

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

     (v) The types of protective devices worn; and

     (vi) The names, job classifications, Social Security numbers, and exposure estimates of the employees whose exposures are represented by the actual monitoring results.

     (b) Exposure determinations. Where the employer has determined that no monitoring is required under this standard, the employer shall maintain a record of the objective data relied upon to support the determination that no employee is exposed to formaldehyde at or above the action level.

     (c) Medical surveillance. The employer shall establish and maintain an accurate record for each employee subject to medical surveillance under this standard. This record shall include:

     (i) The name and Social Security number of the employee;

     (ii) The physician's written opinion;

     (iii) A list of any employee health complaints that may be related to exposure to formaldehyde; and

     (iv) A copy of the medical examination results, including medical disease questionnaires and results of any medical tests required by the standard or mandated by the examining physician.

     (d) Record retention. The employer shall retain records required by this standard for at least the following periods:

     (i) Exposure records and determinations shall be kept for at least thirty years; and

     (ii) Medical records shall be kept for the duration of employment plus thirty years.

     (e) Availability of records.

     (i) Upon request, the employer shall make all records maintained as a requirement of this standard available for examination and copying to the director of labor and industries, or his/her designated representative.

     (ii) The employer shall make employee exposure records, including estimates made from representative monitoring and available upon request for examination and copying, to the subject employee, or former employee, and employee representatives in accordance with chapter 296-802 WAC.

     (iii) Employee medical records required by this standard shall be provided upon request for examination and copying, to the subject employee, or former employee, or to anyone having the specific written consent of the subject employee or former employee in accordance with chapter 296-802 WAC.

[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. 05-03-093, § 296-62-07540, filed 1/18/05, effective 3/1/05; 04-10-026, § 296-62-07540, filed 4/27/04, effective 8/1/04. Statutory Authority: RCW 49.17.010, [49.17].040, [49.17].050. 02-12-098, § 296-62-07540, filed 6/5/02, effective 8/1/02; 01-11-038, § 296-62-07540, filed 5/9/01, effective 9/1/01; 99-10-071, § 296-62-07540, filed 5/4/99, effective 9/1/99. Statutory Authority: Chapter 49.17 RCW. 94-15-096 (Order 94-07), § 296-62-07540, filed 7/20/94, effective 9/20/94; 92-23-017 (Order 92-13), § 296-62-07540, filed 11/10/92, effective 12/18/92; 91-11-070 (Order 91-01), § 296-62-07540, filed 5/20/91, effective 6/20/91; 90-03-029 (Order 89-20), § 296-62-07540, filed 1/11/90, effective 2/26/90; 88-21-002 (Order 88-23), § 296-62-07540, filed 10/6/88, effective 11/7/88.]

OTS-8442.1

AMENDATORY SECTION(Amending WSR 05-03-093, filed 1/18/05, effective 3/1/05)

WAC 296-155-160   Gases, vapors, fumes, dusts, and mists.   (1) Exposure of employees to inhalation, ingestion, skin absorption, or contact with any material or substance at a concentration above those specified in the general occupational health standards, WAC 296-62-07515 shall be avoided.

     (2) To achieve compliance with subsection (1) of this section, administrative or engineering controls must first be implemented whenever feasible. When such controls are not feasible to achieve full compliance, protective equipment or other protective measures shall be used to keep the exposure of employees to air contaminants within the limits prescribed in WAC 296-62-07515. Any equipment and technical measures used for this purpose must first be approved for each particular use by a competent industrial hygienist or other technically qualified person. Whenever respirators are used, their use shall comply with WAC 296-155-220.

     (3) Whenever internal combustion equipment exhausts in enclosed spaces, tests shall be made and recorded to ensure that employees are not exposed to unsafe concentrations of toxic gases or oxygen deficient atmospheres. See chapter 296-62 WAC, the general occupational health standards and chapter 296-841 WAC, identifying and controlling respiratory hazards.

     (4) Whenever any employee is exposed to asbestos, the provisions of the general occupational health standards, chapter 296-62 WAC shall apply.

     (5) Subsections (1) and (2) of this section do not apply to the exposure of employees to formaldehyde. Whenever any employee is exposed to formaldehyde, the requirements of chapter 296-856 WAC ((296-62-07540)) shall apply.

[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. 05-03-093, § 296-155-160, filed 1/18/05, effective 3/1/05. Statutory Authority: Chapter 49.17 RCW. 94-15-096 (Order 94-07), § 296-155-160, filed 7/20/94, effective 9/20/94; 88-14-108 (Order 88-11), § 296-155-160, filed 7/6/88; 87-24-051 (Order 87-24), § 296-155-160, filed 11/30/87. Statutory Authority: RCW 49.17.050(2) and 49.17.040. 87-10-008 (Order 87-06), § 296-155-160, filed 4/27/87. Statutory Authority: RCW 49.17.040 and 49.17.050. 86-03-074 (Order 86-14), § 296-155-160, filed 1/21/86. Statutory Authority: RCW 49.17.040 and 49.17.050. 83-24-013 (Order 83-34), § 296-155-160, filed 11/30/83; Order 74-26, § 296-155-160, filed 5/7/74, effective 6/6/74.]

OTS-8443.1

AMENDATORY SECTION(Amending WSR 03-10-068, filed 5/6/03, effective 8/1/03)

WAC 296-307-56045   Label containers of hazardous chemicals.  

Exemption:

Containers are exempt from this section if ALL hazardous contents are listed in Table 11.

     You must:

     • Make sure every container of hazardous chemicals leaving the workplace is properly labeled. This includes ALL of the following:

     – The identity of the hazardous chemical (the chemical or common name) that matches the identity used on the MSDS

     – An appropriate hazard warning

     – The name and address of the chemical manufacturer, importer, or other responsible party

     – Make sure labeling does not conflict with the requirements of:

     • The Hazardous Materials Transportation Act (49 U.S.C. 1801 et seq.)

     AND

     • Regulations issued under the act by the U.S. Department of Transportation (Title 49 of the Code of Federal Regulations, Parts 171 through 180). See http://www.dot.gov

     – Revise labels within three months of becoming aware of new and significant information about chemical hazards

     – Provide revised labels on containers beginning with the first shipment after a revision, to manufacturers, distributors or employers

     – Revise the label when a chemical is not currently used, produced or imported, before:

     • You resume shipping (or transferring) the chemical

     OR

     • The chemical is reintroduced in the workplace

     – Label information

     • Clearly written in English

     AND

     • Prominently displayed on the container.

Reference:

Additional labeling requirements for specific hazardous chemicals (for example, asbestos((, cadmium, and formaldehyde)) and cadmium) are found in chapter 296-62 WAC, General occupational health standards (see parts F, G, ((I)) and I-1 of that chapter).

Note:

When the conditions specified in Table 10 are met for the solid material products listed, you are not required to provide labels for every shipment.

Table 10 Labeling for Solid Materials
You need only send labels with the first shipment, IF the product is	And
Whole grain	• It is shipped to the same customer AND • No hazardous chemicals are part of or known to be present with the product which could expose employees during handling
Solid untreated wood
Solid metal For example: Steel beams, metal castings
Plastic items
		– For example, cutting fluids on solid metal, and pesticides with grain

Exemptions:

The chemicals (and items) listed in Table 11 are EXEMPT from THIS SECTION under the conditions specified. Requirements in other sections still apply.

Table 11 Conditional Label Exemptions
This section does not apply to		When the product is
• Pesticides		• Subject to
	– Meeting the definition of "pesticides" in the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) (see Title 7, U.S.C. Chapter 6, Subchapter II, section 1361)		– Labeling requirements of FIFRA1
		AND
			– Labeling regulations issued under FIFRA by the United States Environmental Protection Agency (EPA) (see Title 40 of the Code of Federal Regulations2)
• A chemical substance or mixture		• Subject to
	– Meeting the definition of "chemical substance" or "mixture" in the Toxic Substance Control Act (TSCA) (see Title 15 U.S.C. Chapter 53, Subchapter II, Section 26021)		– Labeling requirements of TSCA1
		AND
			– Labeling requirements issued under TSCA by the EPA (see Title 40 of the Code of Federal Regulations2)
• Each of the following		• Subject to:
	– Food – Food additives – Color additives – Drugs – Cosmetics – Medical devices or products – Veterinary devices or products – Materials intended for use in these products (for example: Flavors, and fragrances)		– Labeling requirements in Federal Food, Drug, and Cosmetic Act, Virus-Serum Toxin Act of 1913, and issued regulations enforced by the United States Food and Drug Administration (see Title 21 Parts 101-180 in the Code of Federal Regulations3)
		OR
			– Department of Agriculture (see Title 9, in the Code of Federal Regulations3)
• As defined in
	– The Federal Food, Drug, and Cosmetic Act (see Title 21 U.S.C. Chapter 9, Subchapter II, Section 3211)
OR
	– The Virus-Serum Toxin Act of 1913 (see Title 21 U.S.C. Chapter 5, Section 151 et seq.1)
OR
	– Regulations issued under these acts (see Title 21 Part 101 in the Code of Federal Regulations, and Title 9, in the Code of Federal Regulations3)
• Each of the following:		• Subject to:
	– Distilled spirits (beverage alcohols)		– Labeling requirements of Federal Alcohol Administration Act1
AND		AND
	– Wine		– Labeling regulations issued under Federal Alcohol Administration Act by the Bureau of Alcohol, Tobacco, and Firearms (see Title 27 in the Code of Federal Regulations3)
AND
	– Malt beverage
• As defined in
	– The Federal Alcohol Administration Act (see Title 27 U.S.C. Section 2011)
AND
	– Regulations issued under this act (see Title 27 in the Code of Federal Regulations3)
• Consumer products		• Subject to:
AND			– A consumer product safety or labeling requirement of the Consumer Product Safety Act or Federal Hazardous Substances Act1
• Hazardous substances		OR
	– As defined in the Consumer Product Safety Act (see 15 U.S.C. 2051 et seq.1)		– Regulations issued under these acts by the Consumer Product Safety Commission (see Title 16 in the Code of Federal Regulations3)
AND
	– The Federal Hazardous Substances Act (see 15 U.S.C. 1261 et seq.ą)
• Agricultural seed		• Labeled as required by
AND
• Vegetable seed treated with pesticides			– The Federal Seed Act (see Title 7 U.S.C. Chapter 37 Section 1551 et seq.1)
		AND
			– Labeling requirements issued under Federal Seed Act by the United States Department of Agriculture1

	1This federal act is included in the United States Code. See http://www.access.gpo.gov/uscode/uscmain.html.
	2See http://www.epa.gov.
	3See http://www.access.gpo.gov/nara/cfr/index.html.

[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. 03-10-068, § 296-307-56045, filed 5/6/03, effective 8/1/03.]

     This part applies only if your employees:

     • Are exposed to a respiratory hazard

     OR

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

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

     • Evaluate employee exposures to determine if controls are needed

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

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

     Definition:

     Exposed or exposure:

     The contact an employee has with a toxic substance, harmful physical agent or oxygen deficient condition, whether or not protection is provided by respirators or other personal protective equipment (PPE). Exposure can occur through various routes of entry, such as inhalation, ingestion, skin contact, or skin absorption.

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

Reference:	• Substances in Table 3 that are marked with an X in the "skin" column may require personal protective equipment (PPE). See WAC 296-307-100, Personal protective equipment, for additional information and requirements.
	• If any of the following hazards are present in your workplace, you will need both this part and any of the following specific rules that apply:

Hazard	Rule that applies
Acrylonitrile	WAC 296-62-07336
Arsenic (inorganic)	WAC 296-62-07347
Asbestos	WAC 296-62-077
Benzene	WAC 296-62-07523
Butadiene	WAC 296-62-07460
Cadmium	WAC 296-62-074 through 296-62-07449 or 296-155-174
Carcinogens	Chapter 296-62 WAC, Part F
Coke ovens	Chapter 296-62 WAC, Part O
Cotton dust	Chapter 296-62 WAC, Part N
1,2-Dibromo-3- chloropropane	WAC 296-62-07342
Ethylene oxide	WAC 296-62-07355
Formaldehyde	Chapter 296-856 WAC ((296-62-07540))
Lead	WAC 296-62-07521 or 296-155-176
Methylene chloride	WAC 296-62-07470
Methylenedianiline	WAC 296-62-076 or 296-155-173
Thiram	WAC 296-62-07519
Vinyl chloride	WAC 296-62-07329

[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.060. 05-01-166, § 296-307-624, filed 12/21/04, effective 4/2/05.]

     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      (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	----	----
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      (see WAC 296-62-077)	----	----	----	----	----
Asphalt (Petroleum fumes)	8052-42-4	5 mg/m3	10 mg/m3	----	----
Atrazine	1912-24-9	5 mg/m3	10 mg/m3	----	----
Azinphos methyl (Guthion)	86-50-0	0.2 mg/m3	0.6 mg/m3	----	X
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 WAC      296-62-07523)	71-43-2	1 ppm	5 ppm	----	----
Benzidine      (see WAC 296-62-073)	92-87-5	----	----	----	----
p-Benzoquinone      (Quinone)	106-51-4	0.1 ppm	0.3 ppm	----	----
Benzo(a) pyrene      (Coal tar pitch volatiles)	65996-93-2	0.2 mg/m3	0.6 mg/m3	----	----
Benzoyl peroxide	94-36-0	5 mg/m3	10 mg/m3	----	----
Benzyl chloride	100-44-7	1ppm	3 ppm	----	----
Beryllium and beryllium      compounds (as Be)	7440-41-7	0.002 mg/m3	0.005 mg/m3 (30 min.)	0.025 mg/m3	----
Biphenyl (Diphenyl)	92-52-4	0.2 ppm	0.6 ppm	----	----
Bismuth telluride, undoped	1304-82-1	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Respirable fraction	----	5 mg/m3	10 mg/m3	----	----
Bismuth telluride, Se-doped	----	5 mg/m3	10 mg/m3	----	----
Borates, tetra, sodium salts	----	----	----	----	----
Anhydrous	1330-43-4	1 mg/m3	3 mg/m3	----	----
Decahydrate	1303-96-4	5 mg/m3	10 mg/m3	----	----
Pentahydrate	12179-04-3	1 mg/m3	3 mg/m3	----	----
Boron oxide	1303-86-2	----	----	----	----
Total particulate	----	10 mg/m3	20 mg/m3	----	----
Boron tribromide	10294-33-4	----	----	1 ppm	----
Boron trifluoride	6737-07-2	----	----	1 ppm	----
Bromacil	314-40-9	1 ppm	3 ppm	----	----
Bromine	7726-95-6	0.1 ppm	0.3 ppm	----	----
Bromine pentafluoride	7789-30-2	0.1 ppm	0.3 ppm	----	----
Bromochloromethane      (Chlorobromomthane)	74-97-5	200 ppm	250 ppm	----	----
Bromoform	15-25-2	0.5 ppm	1.5 ppm	----	X
Butadiene      (1,3-butadiene)	106-99-0	1 ppm	5 ppm	----	----
Butane	106-97-8	800 ppm	1,000 ppm	----	----
Butanethiol      (Butyl mercaptan)	109-79-5	0.5 ppm	1.5 ppm	----	----
2-Butanone      (Methyl ethyl ketone)	78-93-3	200 ppm	300 ppm	----	----
2-Butoxy ethanol      (Butyl cellosolve)	111-76-2	25 ppm	38 ppm	----	X
n-Butyl acetate	123-86-4	150 ppm	200 ppm	----	----
sec-Butyl acetate	105-46-4	200 ppm	250 ppm	----	----
tert-Butyl acetate	540-88-5	200 ppm	250 ppm	----	----
Butyl acrylate	141-32-2	10 ppm	20 ppm	----	----
n-Butyl alcohol	71-36-3	----	----	50 ppm	X
sec-Butyl alcohol	78-92-2	100 ppm	150 ppm	-- --	----
tert-Butyl alcohol	75-65-0	100 ppm	150 ppm	----	----
Butylamine	109-73-9	----	----	5 ppm	X
Butyl cellosolve (2-Butoxy ethanol)	111-76-2	25 ppm	38 ppm	----	----
tert-Butyl chromate      (as CrOs)	1189-85-1	----	----	0.1 mg/m3	X
n-Butyl glycidyl ether (BGE)	2426-08-6	25 ppm	38 ppm	----	----
n-Butyl lactate	138-22-7	5 ppm	10 ppm	---	----
Butyl mercaptan	109-79-5	0.5 ppm	1.5 ppm	----	----
o-sec-Butylphenol	89-72-5	5 ppm	10 ppm	----	X
p-tert-Butyl-toluene	98-51-1	10 ppm	20 ppm	----	----
Cadmium oxide fume (as Cd)      (see WAC 296-62-074)	1306-19-0	0.005 mg/m3	----	-- --	----
Cadmium dust and salts (as Cd)      (see WAC 296-62-074)	7440-43-9	0.005 mg/m3	----	----	----
Calcium arsenate      (see WAC 296-62-07347)	----	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 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      (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
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 WAC 296-62-07470)	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 WAC      296-62-07359)	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 ((296-62-07540)))	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)      (see WAC 296-62-07521      and 296-155-176)	7439-92-1	0.05 mg/m3	----	----	----
Lead arsenate (as Pb)      (see WAC 296-62-07347)	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))      (see WAC 296-62-073)	101-14-4	----	----	----	X
MDA      (4, 4-Methylene dianiline)      (see WAC 296-62-076)	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 WAC 296-62-07470)	75-09-2	25 ppm	125 ppm	----	----
4, 4-Methylene dianiline (MDA)      (see WAC 296-62-076)	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	----	----