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x a Coca-Cola Enterprises -West Job No, 90054.02 4.1 ANALYTICAL CHEMISTRY PROCEDURES Each groundwater and field method blank sample was sampled, transported,and analyzed in general accordance with U.S.Environmental Protection Agency(EPA)document SW-846,"Test Waste", 3rd Edition. The groundwater and field method blank Methods for Evaluating Solid ! samples were submitted to Sequoia Analytical,Redwood City,California for analysis. Each sample was analyzed for total petroleum hydrocarbons CUM in accordance with EPA method 3510/8015 modified for diesel, and for TPH in accordance with EPA method distinction on the aromatic hydrocarbons-benzene, 5030/5015/8020 modified for gasoline with toluene,ethylbenzene,and total xylenes (BTEX). 4.2 ANALYTICAL CHEMISTRY RESULTS groundwater samples are summarized in Table 3. The analytical chemistry test results of the The laboratory certificates of analysis are presented in Appendix B, The analytical chemistry test results of the groundwater samples indicate that petroleum hydrocarbons were present in four of the six existing groundwater monitoring:wells(MW-1,MW-3,MW -4,and MW-5). Monitoring well MW-6 showed slight traces of toluene 0.66 parts per billion (ppb) and total xylenes 0.33 ppb. Monitoring well MW-2 showed no petroleum hydrocarbon contamination above laboratory detection limits. The analysis from the groundwater sample collected in MW-3 indicated TPH concentration of 130 ppb quantitated against a gasoline standard.Benzene concentrations were also found to be present in groundwater monitoring wells MW-1 (0.98 ppb),MW-3 {3.9 ppb), MW-4(0.85 ppb),and MW-5(0.75 ppb). 5.0 SUMMARY AND CONCLUSIONS Six existing groundwater monitoring wells were monitored and sampled in December 1990 by ? UMC personnel. Groundwater monitoring results indicate that the groundwater flow is generally to the northeast. f -- - 4 ve i .