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lamp The test procedure involved measuring approximately 30 grams from an undisturbed soil <br /> sample, placing this subsample in a ZiplockTm-type bag or in a clean glass far, and sealing the far <br /> with aluminum foil secured under a ring-type threaded lid The container was warmed for <br /> approximately 20 minutes (in the sun), then the head-space within the container was tested for <br /> total organic vapor, measured in parts per million as benzene (ppm, volume/volume) The <br /> instrument was calibrated prior to drilling The results of the field-testing were noted on the <br /> boring logs FID/PID readings are useful for indicating relative levels of contamination, but <br /> cannot be used to evaluate hydrocarbon levels with the confidence of laboratory analyses <br /> Laboratory Procedures <br /> Selected soil samples were analyzed for the presence of TPHg and BTEX using the DHSILUFI' <br /> Method Soil samples were also analyzed for fuel oxygenates [TBA, MtBE, DIPE, EtBE, <br /> TAME, and ethanol], 1,2-DCA, and EDB by EPA Method 8260B Soil samples were also <br /> analyzed for methanol using EPA Method 8015 Modified <br /> Groundwater samples were collected by GRI following well development, and were analyzed for <br /> the presence of TPHg, BTEX, and MtBE by EPA Methods 8015 Modified and 8021B, and fuel <br /> oxygenates (MtBE, TAME, DIPE, EtBE, TBA, and ethanol), 1,2-DCA, and EDB using EPA <br /> Method 8260B <br /> . SoiI Cuttings and Purge Water <br /> Soil cuttings generated during drilling operations were temporarily stored on-site and covered <br /> with plastic sheeting pending characterization and disposal A California-certified disposal <br /> contractor transported soil cuttings to an appropriate disposal facility Water generated during <br /> steam cleaning, development, and sampling of wells was temporarily stored in DOT-approved <br /> 55-gallon drums pending transport by the disposal contractor to an appropriate disposal or <br /> treatment facility <br /> IT CORPORATION <br /> SAC 1I ITosco Marketing144091Reports\AsmtRpt doc-00\s I <br /> B-2 <br />