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was not encountered in any of the bonngs A photoâ–ºonization detector (PTD) was used as a screening <br /> device for the detection of petroleum hydrocarbon vapors in drill cuttings and cored samples Soil <br /> samples were screened with the PID (calibrated daily to an isobutylene standard) by placing a <br /> representative amount of material into a sealed plastic bag and analyzing the headspace vapors <br /> Selected samples were submitted for laboratory analysis based on PID and field observations <br /> To avoid cross-contamination, drilling augers were steam cleaned before drilling each borehole Water <br /> used to clean the augers was stored in drums approved for hazardous liquid storage and remains on- <br /> site <br /> 1 3.1.1 Soil Sampling <br /> The selected samples from bonngs around the gasoline tanks and pump island were analyzed for <br /> BTEX (EPA 8020) and TPHG (EPA 8015) In addition, the sample from boring EPSB6 was analyzed <br /> for soluble lead (EPA 7421) The samples from bonngs around the diesel tank were analyzed for <br /> BTEX (EPA 8020) and TPHD (EPA 8015) Analytical results are summarized on Table 2 <br /> 3.1.2 Stockpiled Soil Sampling <br /> On October 17, 1991, two- 4 to 1 composite samples were collected from the soils stockpiled during <br /> tank removal and drilling The samples were analyzed for BTEX (EPA 8020), TPHG and TPHD <br /> (EPA 8015) Analytical results are summarized in Table 2 <br /> 3,2 Phase H Activities <br /> On March 2, 1992, RESNA personnel advanced one soil boring (MW1) to a depth of 85 feet below <br /> grade at the project site to accomplish the following 1) further define the vertical extent of petroleum <br /> hydrocarbon soil contamination beneath the former pump island, 2) further characterize site <br /> stratigraphy, and 3) install a groundwater monitoring well within the uppermost water bearing zone <br /> in order to assess groundwater quality The boring/well location is exhibited on Figure 4 <br /> 1 <br /> R 042992 TIL 4 <br />