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The field team should remove their personal protective clothing in the following sequence : Step 1 : Move out of the exclusion zone and into the decontamination zone . Do not remove personal protective equipment . Step 2 : Obtain decontamination solutions and decontaminate the spades , shovels and other equipment by brushing them under a water rinse . A high-pressure steam cleaner may also be used for decontamination . All wastes and spent decontamination liquids will be properly contained . Step 3 : Remove outer gloves and coveralls and place them inside a garbage bag. Keep the air purifying respirator on . Step 4 . Move to the support zone and remove the respirator . Monitoring Program Personal exposure to ambient airborne hazards will be monitored to assure that personnel exposures do not exceed acceptable limits and that appropriate selection of protective equipment items is made . Airborne hydrocarbon vapor concentrations will be measured primarily by the use of a hydrocarbon vapor meter . If concentrations approach criteria levels , all personnel will be notified of possible site safety changers . Audits will be conducted by the Safety Officer to insure compliance with the Safety Plan and to provide additional support as required. Ambient Vapor Reading A hydrocarbon vapor detector will be used during drilling and excavation activities . This instrument will be used to measure both excavation and breathing zone concentration of hydrocarbon vapors . The instrument will be calibrated on a regular schedule using known calibrated gases . Readings will be taken in the area where the field team members are working and surrounding down-wind areas . Measurements will be taken every 30 minutes where hydrocarbon vapors indicate levels above 30 ppmv . All readings will be recorded in a field notebook . Emergency Procedures listed in this plan are designed to give the field team instruction on how to handle medical emergencies and fires and explosions . The emergency procedures will be carefully reviewed with the field team during the health and safety training session .