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4.0 DATA INTERPRETATION <br /> The soil samples were analyzgd by EPA Method 8270 for TPH as diesel and EPA Method <br /> 8260 for BTEX. The results reported above indicate that total petroleum hydrocarbons as <br /> diesel where not detected at or above the reporting limit (2.5 mg/kg) below the former <br /> UST. BTEX were not detected above the reporting limit (0.0025 mg/kg) below the former <br /> UST. Analysis of the composite sample collected from the stockpiled soil indicate TPH-D <br /> compounds at a concentration of 180 mg/kg and no BTEX compounds above the reporting <br /> limit of 0.005 mg/kg. Laboratory quality assurance surrogate recovery for excavation <br /> - samples was between 68 and 132 percent, indicating acceptable results. <br /> Stockton ASR UST <br /> Removal/Closure Report 6 June 24, 1994 <br />