ARCHIVED REPORTS XR0006868 - Laserfiche WebLink

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million (ppm). Exposure to aromatic compounds could occur primarily ' through inhalation of vapors during drilling and sampling. To a lesser extent, absorption of these compounds through unprotected skin could ' also become an exposure pathway. Exposure Monitoring Plan Air quality surveys will be performed during drilling and sampling activities so that airborne concentrations of contaminants remain below prescribed action levels. The minimum frequency for air quality surveys will be once every 30 minutes. The On-site Safety Coordinator will perform air moni- toring with a portable photoionization detector. Results of the survey will be used to assess the level of respiratory protection required. If total organic vapor levels exceed t ppm in the general breathing zone, the On-site Safety Coordinator will require the use of air-purifying respirators. If organic vapor levels exceed 5 ppm, all personnel will immediately stop operations and move to a suitable upwind location. After relocation to a ' safe area is complete, the On-site Safety Coordinator will initiate down- wind perimeter monitoring and, if necessary, warn unprotected personnel. Equipment used to monitor the site under investigation for airborne levels of vapors and gases will be calibrated daily before use. A photoionization detector will be calibrated with a 100 ppm isobutylene standard. This instrument will be zeroed in a contaminant-free atmosphere immediately before use. Airborne measurements of organic gases and vapors recorded during field activities will be documented in a field notebook by the On-site Safety Coordinator. ' Personal Protective Equipment The following protective equipment will be required during drilling and ' sampling activities: O hard hat ' G air-purifying respirators with organic vapor and acid gas cartridges (readily available) G safety glasses or goggles 4 vinyl steel-toe boots ' 04921t920201 a A - 2 Rev. 0 June 1, 1992