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_ g - <br /> MM1 <br /> drill cuttings and soil samples utilizing the Unified Soil Classification System. Descriptions of <br /> soil types encountered, sample collection intervals, and boring abandonment details were <br /> recorded on weIl/boring logs (Appendix II). Cored soil samples were collected at 5 foot <br /> intervals in the vertical borings and from the bottom of the angle soil boring. Groundwater was <br /> not-encountered in any boring. A photoionization detector(PID)was used as a screening device <br /> for the detection of petroleum hydrocarbon vapors in drill cuttings and cored samples. Soil <br /> samples were tested with the PID (calibrated daily to an isobutylene standard) by placing a <br /> representative amount of material into a plastic bag and analyzing the headspace after a suitable <br /> period. Selected samples were submitted for laboratory analysis based on PID and field <br /> observations. <br /> The selected samples from borings around the gasoline tanks and pump island were analyzed for <br /> BTEX (EPA 8020) and TPHG (EPA 8015). In addition, one sample from each boring was <br /> analyzed for soluble lead (EPA 7421). The samples from around the diesel tank were analyzed <br /> „ for BTEX (EPA 8020)and TPHD (EPS, 8015). Analytical results are summarized on Table 2. <br /> Laboratory data sheets and chain-of-custody documentation are enclosed to Appendix M. <br /> Two- 4 to 1 composite samples were collected from the soil piles created during tank removal <br /> and drilling. The samples were analyzed for BTEX (EPA 8020), TPHG and TPHD (EPA <br /> 8015). Analytical results are summarized in Table 2. Laboratory data sheets and chain-of- <br /> custody documentation are enclosed in Appendix III. <br /> To avoid cross-contamination, drilling augers were steam cleaned before drilling each borehole. <br /> Water used to clean the augers was stored in drums approved for hazardous liquid storage and <br /> remains on-site. <br /> 3.2 Subsurface Conditions <br /> oili�encouniered beneath the site consist primarily of sands and silts to approxirnately 46`feet.: <br /> iief6wi grade,'the maximum depth explored. <br /> FPRL203.T)L <br />