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Ge o lo ica(Technics Znc. <br /> 2741 River Road <br /> M-&W,Cafxf—L-95351 <br /> (209)538-6424/faX#538-5852 <br /> Work Plan <br /> Soil Investigation <br /> r Arctic Ice <br /> 36 North D Street <br /> Stockton, CA <br /> Project No. 691.2 <br /> November 20, 1998 <br /> 1.0 INTRODUCTION . <br /> Geological Technics Inc. performed Phase I Environmental Site Assessment on this property <br /> in.August 1998. During this assessment, it was discovered that two underground storage <br /> tanks were located on this property That Arctic Ice did not know about. It was recommended <br /> k <br /> that these tanks be removed under County supervision and permit. <br /> Geological Technics Inc. and Del-Tech Geotechnical Support: Services performed tank <br /> closure, removal and soil sample collection work on October 15., 1998. Soil samples were <br /> collected under the two underground storage tanks as directed by Letitia Briggs, REHS, the . <br /> County inspector. The tests results show the following: <br /> 1. FUEL TANK — Located near the west entrance of the Quonset but building, TEPH-Diesel <br /> r. was found below the fuel tank at a concentration of 3300 mg/kg. TPH-G, BTEX, and the <br /> Oxygenated fuel compounds were not detected and lead was within expected <br /> concentrations for native soils of this region. <br /> 2. WASTE OIL WANK —No contamination was found under the small waste oil tank located <br /> south Quonset but and east of the fence/gate area. <br /> 2:0 PROPOSED INVESTIGATION <br /> To investigate the vertical and lateral extent of soil impacted with diesel range petroleurn <br /> hydrocarbons discovered during closure of the diesel tank, Geological Technics Inc. proposes <br /> to drill three boreholes up to 45 feet deep. These boreholes will be.located near the former <br /> diesel tank removed on October 15, 1998; on the northwest side of the property. Refer to <br /> Figure 2: Site Map for well locations. One borehole will be drilled near the north end of.the <br /> former tank, ,a second approximately 20 feet north of the former tank and the third <br /> approximately 20 feet south of the former tank. <br />