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r Geology The upper 60 feet of soil at the East Miner Avenue location consists predoinin,rntly cif silty fine sand and sandy silt. This material is probably Recent Alluvium and/or Victor Formation. No groundwater was encountered in any of the boreholes,which eMended to a maximum depth of 66 feet below ground surface. 500-Gallon ]Diesel Tank Ground penetrating radar (GPR) was used to electromagnetically identify subsurface anomalies, such as a tank or piping. Although some subsurface anomalies or electromagnetic reflections were encountered in the location of the suspected diesel tank, no reflection patterns characteristic of underground storage tanks were identified. Extent of Hydrocarbons and Lead in Subsurface The results of the soil bas survey indicated that little to no hydrocarbon 'vapor exist in the upper 13 feet of subsurface surrounding the former gasoline tank. Soil samples were collected at 5-font intervals to depths between 40 and 66 feet below ground surface. The maximum TPH-Gas concentration detected was 3.6 mglkg; this is only slightly above the detection limit of 1 mglkg. BTEX and TPH-Diesel were not detected in any soil sample. Lead concentrations ranged from 3.30 to 15.90 mg/kg. These levels are within the range for background lead concentrations. Conclusions and Recornmendations Conclusions and Recommendations are presented in Section 5 of this report. The available information indicates that the underground diesel tank dues not presently at the location shown on the 3983 map. The soil at exist, and may never have existed, the East Miner Avenue location does not contain hydrocarbon or lead concentrations above recommended cleanup levels. Based on the Leaking Underground Fuel Tank (LUFI') Field Manual (State Water Resources Control Board), nes further remedial action is recommended. st�oar60%R Wr.sr ii