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Washington Administrative Code (Last Updated: November 23, 2016) |
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Title 296. Labor and Industries, Department of |
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Chapter 296-307. Safety standards for agriculture. |
Section 296-307-62625. Permissible exposure limits of air contaminants.
Latest version.
- 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:Table 3 "Permissible Exposure Limits for Air Contaminants"
Rules
296-307-100,