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MA - r ' The samples selected for analysis were those with the highest organic vapor content as determined by the OVA screening con- ducted at the time of sampling. Soil samples from MW7 contained a maximum of 0. 14 mg/kg toluene ( 55.5 foot depth ) , 0.026 mg/kg xylenes (40.5 foot depth), and 1 .6 mg/kg total fuel hydrocarbons (30. 5 foot depth) . No benzene or ethylbenzene was detected in this boring. _ Soils from' SB6 contained up to 0.018 mg/kg of toluene and xylenes In the samples from 30. 5 feet, 40.5 feet, and 45.5 feet. No other fuel constituents were detected in these samples. Samples . from `55.5 feet and 15.5 feet contained no detectable fuel con- stituents- Soil on-stituents-Soil samples from SB5 were analyzed for„inorganic metals, oil and i grease (by EPA Method 503 D&E) , purgeable fuels as gasoline (by r+ j EPA, Method 801'5 ), volatile 'organics (41- compounds by EPA Method . 8240 ), extractable organics ('92 compounds by EPA Method 8270) . 'No concentrations of organic compounds greater than method detec- i tion limits were measured in soil samples from SB5_ The samples ? ' did contain detectable inorganic zinc (up to 43 mg/kg)., chromium (,uP to .58 .mg/kg), and cadmium (one sample of 1 .4 mg/kg) : % . Copies of .the analytical results are included as Appendix B. i 4 .2.2 Water Sampling Results The results...of-groundwater. sampling .t o-.-date are. summarized -in - -- -3 .Table 3. Throughout the period sampled .MW3'has"shown the Highest hydrocarbon -levels .of ,the ,five wells. This well is located in the former tank field area. A sample collected from r MW3 on '19 July 1989 contained 0.390 mg/L .benzene and 2.800` mg/L . �# TPH. A sample of groundwater was collected without purging the - customary. 3-5 well volumes because .MW3 did not contain a suf- ficient volume of water to allow. pxoper purging prior to " e25/73050/8-89/txt 16