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1 <br /> 8 February 1993 <br /> (GeoAudit 652-S) <br /> Page 2 of 3 <br /> plan will be followed. To meet the objectives of the addendum, the <br /> following activities will be performed: <br /> 1) Prepare a site health and safety plan in accordance with the <br /> Occupational Safety and Health Guidance Manual for Hazardous <br /> Waste Site Activities - Prepared by National Institute for <br /> Occupational Safety and Health, Occupational Safety and Health <br /> Administration, U.S. Coast Guard and U.S. Environmental <br /> Protection Agency, October 1985. <br /> 2) Notify the EHD 48 hours prior to commencement of any work. <br /> 3) Drill two vertical borings to a depth of 15 feet utilizing a <br /> hollow-stem auger drill rig. The estimated boring locations <br /> are depicted on Figure 2 - Site Plan. <br /> 4) Obtain discrete soil samples every five feet using a sampler <br /> loaded with three pre-cleaned brass tubes. <br /> 5) Preserve soil samples in the lead brass tube by covering both <br /> ends with aluminum sheets, capping and sealing with tape. <br /> 6) Label and log soil samples on a chain of custody form. <br /> 7) Store the samples under ice and transport the samples in a <br /> chilled container to a State certified laboratory for <br /> analysis. <br /> 8) Analyze selected soil samples for total petroleum hydrocarbons <br /> (TPH as gasoline and diesel) and BTE&X in accordance with EPA <br /> methods 8015 and 8020, respectively. <br /> 9) Decontaminate sampling equipment in a tri-sodium phosphate <br /> solution (TSP) and rinse twice with water prior to each <br /> sampling run. <br /> 10) Monitor auger returns and soil sample duplicates for the <br /> presence of volatile organics using a photo-ionization <br /> detector (PID) pre-calibrated to isobutylene. <br /> 11) Log auger returns and soil samples in accordance with the <br /> Unified Soil Classification System. <br /> 12) Place auger returns on plastic sheeting and store on-site <br /> pending analytical results. <br /> 13) Backfill the borings using concrete-bentonite slurry in the <br /> entire depth of the borings. <br />