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21 August 1992 <br /> (GeoAudit CV 43C5-1. 61) <br /> Page 3 of 3 <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. Actual <br /> termination depth of the borings will be determined from field <br /> observations using the PID, <br /> 11) Log auger returns in accordance with the Unified Soil <br /> Classification System. <br /> 12) Place auger returns in 55 gallon DOT drums and stored on-site <br /> pending analytical results. <br /> 13) Backfill the borings using concrete-bentonite slurry in the <br /> entire depth of the borings. <br /> 14) Submit a site investigation report detailing the results of <br /> the work to the SJ PHS/EHD. <br />