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After removal from the sampler, soil in the middle tube was <br /> extruded into a plastic bag and screened for volatile organic <br />' compounds using a photo-ionization detector (PID: Thermo <br /> Environmental 580A, 10. 0 eV, calibrated to isobutylene) . The <br /> reading was recorded on the boring log, and the soil was described <br /> in accordance with the Unified Soil Classification System (Appendix <br /> A) . The ends of the lower tube were covered with aluminum sheets, <br /> capped, sealed with tape and stored on ice pending analysis. <br /> I3.2 .2 Well Completion <br /> The three soil borings were completed as 4-inch diameter <br />' remediation wells, in accordance with the design shown in Appendix <br /> A. <br />' 3 .2 .3 Soil Sample Analysis <br /> A total of 32 soil samples were collected from the soil borings. <br /> Thirteen of these samples were analyzed by Geochem Environmental <br /> Laboratories for TPH as gasoline and BTE&X in accordance with EPA <br /> methods 8015m and 8020, respectively. <br /> 4. 0 FINDINGS <br /> 4 .2 Groundwater Gradient and Direction <br /> The depth to first groundwater ranges from 59 feet north of the <br /> site to 61 feet southwest of the site. Figure 4 is a groundwater <br /> gradient map, based upon the data collected on September 27 , 1993 . <br /> Groundwater flow is south-southwest in the area. <br />' 4.2 Groundwater Contamination <br /> TPH as gasoline, benzene and etlylbenzene were only detected in <br /> samples from EW-1 (2 , 200 ppb; 1, 300 ppb; 76 ppb) and MW-14 (1, 400 <br />' ppb; 160 ppb; 120 ppb) . Toluene was detected only in samples from <br /> MW-12 and MW-14 at concentrations of 0. 87 ppb and 220 ppb, <br /> respectively. Xylenes were detected in EW-1 at 190 ppb, as well as <br />' in MW-6 , MW--12 and MW-14 . The analytical results are summarized in <br /> Table 3 . The laboratory report and chain-of-custody are included in <br /> Appendix B. <br />' Lead was not detected in any of the water samples collected. EDB it <br /> was detected only in MW-14, at 2 . 7 ppb. The analytical results are c <br /> summarized in Table 3 . The laboratory report and chain-of-custody 1 <br />' are included in Appendix B. <br /> 1, 2-Dichloroethane was detected in EW-1, NW-13 and MW-14 at <br /> concentrations of 25 ppb, 12 ppb and 36 ppb, respectively. No other 1 <br /> volatile halocarbons were detected in any of the water samples. <br /> f <br /> 9 l <br />