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P� Soil Analytical Results Preserved soil samples were collected at 5-foot depth intervals during the drilling of Wells U-1,U-2, and U-3. Selected soil samples were submitted to a certified laboratory and analyzed for total petroleum hydrocarbons calculated as gasoline (TPH gasoline), total semi- and non-volatile hydrocarbons calculated as diesel (TPH diesel), and benzene, toluene, ethylbenzene, and total xylenes (BTEX compounds) using DHS LUFF Method. The samples submitted from U-2 were also analyzed for halogenated volatile organics by EPA Method 8010. The sampling and analytical procedures employed are described in Appendix A of this report, and a summary of soil analytical results is presented in Table 2. The sample from BoringU-1 at the 5 to 6-1/2foot depth was found to contain 1,804 ppm TPH gasoline and 710 ppm TPH diesel. This sample also contained 2.7 ppm benzene,52 ppm ethylbenzene,and 66 ppm xylenes. At the 10 to 11-1/2 foot depth in Boring U-1, only 3.2 ppm TPH diesel was reported. All other parameters were below detection limits. The S. to 6-1/2 foot.sample from Baring U-2 contained 1200 5 0 ppm diesel,'16 ppm ethylbenzene, and 74 ppm Xylenes. Benzene and toPpm luene were not detected in U-2 at the 5 to 6-1/2 foot sample. The U-2 I0 to _ i contained no detectable concentrations of TPH gasoline, TPH ldieseI f foot BTEX compounds. Soil samples from the 5 to 6-1/2 and 10 to 11-1/2 foot depths from U-2 were also analyzed for halogenated volatile organics (EPA Method 8010). None of these analytes were detected in either of the soil samples from U-2. The soil samples collected at the 5 to 6-1/2 and 10 to 11-1/2 foot depths in U-3 were found to contain 5.2 ppm TPH diesel in the 10 to 11-1/2 foot sample. All other analytes were below detection limits in both samples. Groundwater Analytical Results Groundwater samples were,collected from Monitoring WeIIs U-1 throughU-3, and from thc'site water supply well (WSW-1) during the November 1.1, 1990, sampling event. These samples were analyzed for TPH gasoline,TPH diesel B'� and halogenated volatile organics (EPA 624) by a State-certified analyti alcompoundslaboratory. The BTEX concentrations presented in this discussion represent the results of the EPA 624 analysis, which are higher than the concentrations reported in the EPA Method 8020 analysis. The results of these analyses are summarized in Table I. Groundwater frons U-1.:.coatained 140 parts per.billion (ppb) TPH gasoline 19 ppb F benzene,'and 3 ppb total xylenes. Diesel, toluene., and ethylbenzene were not detected til the U-1 water sample_The-I -2 water sample.contained TPH gasoline;-benzene;and------ 3100101/REPORT ----3100141/REPORT 5 February 13,1991 {