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Ileal[h and Safety Plan April 1322011 Page 2 2.2 AMBIENT AIR MONITORING/RESPIRATOR REQUIREMENTS Benzene, a constituent of gasoline, wilt be used as an indicator parameter for ambient air monitoring. Because benzene is a suspected carcinogen and, therefore, highly regulated, it will be useful as a conservative indicator parameter. The following discussion assumes that exposure to benzene is a possibility; thus, a safety measure for other potential air-bome contaminants is achieved. a. Breathing zone vapor at detectable concentrations at the drilling area greater than 1 .0 parts per million (ppm) for five minutes, as detected by PID, requires site personnel to use a respirator with organic vapor cartridges while working in the exclusion zone . As a reference, the OSHA-PEL for benzene is 1 .0 ppm. b. Breathing zone vapor at detectable concentrations requires site manager to monitor the site perimeter (concentrating in the down wind direction). c. Breathing zone vapor concentrations that reach or exceed 10 ppm during drilling activities at the drilling area, as detected by the PID, requires site personnel to use a respirator with organic vapor cartridges while working in the exclusion zone. I � d. Breathing zone vapor concentrations that reach or exceed 50 ppm at the drilling area, as detected by the PID, requires site activities to be stopped until concentrations decrease. Site manager should continuously monitor site perimeter. je. If breathing zone vapor concentrations are detected at the site perimeter, the site manager shall monitor the perimeter at 30 minute intervals. _J f If the vapor concentrations continue to reach or exceed a value of 10 ppm at the site perimeter for 15 minutes, drilling activities shall be stopped. Appropriate regulatory agencies should be r - contacted (see contact sheet) . Site manager shall continue to monitor conditions until levels are reduced to background conditions . 2.3 SHIN/CLOTHES PROTECTION I Steel-toed boots and hard hats will be worn during all field activities. Disposable Tyvek suits, steel-toed rubber boots or steel-toed boots covered with disposable boots, and nitrile rubber gloves will be wom when deemed necessary by the Site Safety Officer. I Disposable nitrile rubber gloves will be wom for sampling (changed after each sample). Disposable clothing will be discarded to an appropriate storage container as necessary. 2A EYE PROTECTION Safety glasses will be worn during all activities. 2.5 VEHICLE MAINTENANCE AND SAFETY All Condor vehicles used on site during the course of work shall be equipped with a first aid kit and a dry chemical fire extinguisher ( 10 BC minimum rating). ' i All cabs are to be kept free of all non-essential items and all loose items secured. CONDOR