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r - <br /> 5 .r <br /> The boreholes will be 'backfilled with neat cement gro-and upon <br /> completion-of soil vapor sampling activities. The neat cement will <br /> he - tremied from the- bottom of the borehole to the top of the <br /> borehole. <br /> VO d LABORATORY ANALYSES <br /> The soil samples will be sent to a state-certified laboratory and <br /> selectively anal.yied for : <br /> P TPHd using EPA Method 80150, . <br /> P TOG using EPA Method 1669.; <br /> P PCBs using , EPA Method 8082A; . <br /> e VQCs using EPA Method 6260B,- <br /> WOO <br /> 260D;WOO using EPA Method 8270W and <br /> Cadmium, chromium, hexavalent chromium, lead, nitckel., and <br /> Linc usinj EPA Methods Q00, 8/218. 6. <br /> At, a minimum; soil samples -collected from obvious contamination <br /> zones, and at the soil/groundwater interface -will be analyzed for <br /> the abo;rezmentioned constituents. These samples will be analyzed on <br /> a normal one-week turnaround basis . The remaining soil samples <br /> collected that are not - analyzed will be -put on hold at the <br /> -laboratory. <br /> Soil vapor samples collected from each probe will be transferred <br /> directly to thy on-site mobile laboratory and analyzed immediately. <br /> Samples will be analyzed on a gas chromatograph equipped with <br /> capillary columns .and a combination of MS, wLCD (Hall) , PID; and. <br /> FID detectors an needed. The samples will, be analyzed fox - VOCs <br /> using EPA Method 8260 and TPH ,using EPA Method 8015M. <br /> 6.0 REPORT IREFARATION <br /> A written report Vilf be prepared following receipt of laboratory <br /> analytical results. The report will describe our field <br /> observations, sample collection, laboratory analytical results, and <br /> conclusions regarding the supplementary soil and soil vapor <br /> investigation activities, rhe report -will be submitted to the San <br /> '3oaquin. County Environmental Health Department- within two to three <br /> creeks of complAtion of field activities and receipt of laboratory <br /> aralytl cal results. <br /> 5 <br />