ARCHIVED REPORTS XR0006864 - 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 1 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: ' 4 hard hat ' G air-purifying respirators with organic vapor and acid gas cartridges (readily available) C safety glasses or goggles ' G vinyl steel-toe boots pjf1f921f920201a A - 2 Rev. 0 June 1, 1992