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Rjpona Market <br /> Soil & Groundwater Investigation Re <br /> Page 3 <br /> • The soil samples were obtained using a Geoprobe' core sampler with plastic liners <br />' The sampler was pushed (Direct Push Technology) continuously by the <br /> hydraulically powered, percussion system <br /> I The laboratory samples did not have headspace and were immediately sealed in <br /> their liners using plastic caps The remaining sample was removed from its liner to <br /> be used as an aide to the on-site geologist in logging the material at that depth <br />' All soil samples were delivered, under chain of custody, to an analytical laboratory <br /> licensed by the State of California for hazardous materials work The samples were <br />' analyzed for Total Petroleum Hydrocarbons (Gasoline), BTEX & MTBE by <br /> Method 8020 and 8260 Analyses were conducted by GeoAnalytical Laboratories, <br /> I <br /> Inc , in Modesto, California <br /> All rinse water was removed by the driller, V&W Drilling, Inc Drill cuttings are <br /> not produced by this method <br />' 2.3 Groundwater Sampling <br />' All sampling equipment, including the stainless steel Geoprobe' screen point, used <br /> by sampling personnel, was disassembled and steam cleaned prior to <br /> . commencement of sampling <br />' The groundwater sample was analyzed or extracted within 14 days according to <br /> their EPA methods It was analyzed for Total Petroleum Hydrocarbons (gasoline), <br />' BTX&E (Benzene, Toluene, Xylene, and Ethyl Benzene) and the Oxygenated <br /> Compounds by Method 8260 Analysis was conducted by GeoAnalytical <br /> Laboratories, Inc in Modesto, California <br /> 30 CONCLUSIONS <br /> Two 8000-gallon underground gasoline tanks were removed from the subject property in <br /> 1999 and soils excavated to about 15 feet Sampling of the soil adjacent to and below the <br />' former tanks did not disclose significant contamination However, the stockpiled soils, <br /> containing petroleum compounds, were placed back into the excavation <br />' As demonstrated by our soil boring concentrations of petroleum, within the backfill area, <br /> are at relatively insignificant concentrations, at least at this point of boring The <br /> groundwater sample contained low levels of MTBE Significant levels of MTBE are <br />' present in the soil at 25 feet in depth <br /> We believe that gasoline and gasoline constituents, BTEX, are of a level in the soil that <br /> would not pose a significant threat to groundwater or public health However, in light of <br />