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Morita Brothers 6 May 6, 1992 <br /> LTatile 2 presents a_ summary_ of the analytical results for-TPH as gasoline and diesel, <br />' the fuel constituent volatile aromatics, EDB, PCBs, and total lead in the soil sample <br /> from beneath the waste oil tank <br />' <br /> TABLE 2 Analytical Results expressed in milligrams per kilogram <br />' Sample Depth TPHTPH TPH Volatile IDB PCBs Total <br /> Gasoline Diesel O&G Aromatics Lead <br />' TK-49' ND ND 400 ND ND ND 250 <br /> AL NA 10 100 100 NA 0 02 1 ND 15110001 <br /> ND None Detected at or above minimum reporting level <br />' NA Not Applicable <br /> * exceeds current recommended guidelines <br /> A L Regional Water Quality Control Board recommended guidelines for contaminants in soil The <br />' recommended guidelines were calculated using the LUFT methodology by multiplying the most <br /> stringent current federal or state water quality standards by a factor of 100 to account for <br /> attenuation due to soil composition and distance from groundwater <br /> Based on the soil sampling and analysis, concentrations of TPH as gasoline and the <br />' gasoline constituent volatile aromatics present in the soils at the site exceed current <br /> recommended guidelines Additional site characterization is required by the San <br /> Joaquin County Department of Environmental Health Services in the vicinity of the <br /> north end of the gasoline product pipelines, and beneath the former 5,000 gallon <br /> underground unleaded gasoline storage tank ESE was retained by Crisp Construction <br />' to perform the site characterization Below are the results of the site <br /> characterization <br /> 1` <br /> 2.0 METHODS OF INVESTIGATION <br /> 2 1 Drilling and Soil Sampling <br /> Prior to commencing field operations, a technical work plan was reviewed and <br /> approved by San Joaquin County Department of Environmental Health Services <br />' personnel Underground Service Alert was notified 48 hours in advance of the site <br /> activities Drilling commenced on March 25, 1992 using a MobileTm B-53 truck <br /> mounted drill rig, operated by Turner Explorations, and equipped with 6-inch <br /> diameter hollow-stem augers The augers were steam cleaned prior to use to <br /> minimize the possibility of cross-contamination <br /> EB-8101-2 9204-EO44 RPT <br />