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• The greatest potential hazards to safety and health at this site are <br /> 1 Exposure to chemical vapors and particulates - through inhalation <br /> 2 Exposure to chemical contamination - through skin contact with and Ingestion <br /> of soil <br /> Ongoing air monitoring during project tasks will provide data to ensure that vapor <br /> concentrations are within acceptable ranges and will provide adequate selection <br /> criteria for respiratory and dermal protection A Photo Ionization Detector (PID) shall <br /> be utilized for monitoring with a 1 part per million (ppm) detection limit <br /> • If PID readings taken in the breathing zone exceed 25 ppm sustainable above <br /> background, a NIOSH approved air-purifying respirator with organic vapor <br /> cartridges must be worn by all site workers within the area where the <br /> sustainable elevated level exists, until the level is reduced <br /> • If PID readings taken in the breathing zone exceed 750 ppm, Level B protection <br /> will be required Personnel must leave site immediately and contact FSS or <br /> Health & Safety Manager for further instructions <br /> • Respirator cartridges will be changed once per day as a minimum This can be <br /> accomplished at the end of the work day during respirator decontamination <br /> If odor breakthrough is detected while wearing the respirator or breathing <br /> becomes difficult, change cartridges immediately <br /> If the entry is done "under air", Supplied Air requirements must be adhered to <br /> as well <br /> 9.1 Stopping Work <br /> Criteria for stopping work and evacuating personnel from the work zone are <br /> listed below Once work is stopped due to a reason listed below, operations, <br /> work practices and protective strategies will be re-evaluated and modified, if <br /> necessary, through consultation with the FSS prior to resuming activity <br /> The detection of combustible gas levels in excess of 10 "/�) (LEL) in an, where <br /> fans or air circulation are unable to reduce the LEL less than 10"1,) <br /> • "Verified" and suylainable organic vapor levels of >50 ppm via the PID <br /> in the breathing zone foi pei gods exceeding 30 minutes <br /> • The detection of gaseous contaminants that cannot be removed by the <br /> Avalon Environmental Consultants 9627-001-2 <br /> Kashmar Singh )oes Truck Stop <br /> October 20, 1998 15 Lathrop, California <br />