ARCHIVED REPORTS_XR0008273 CASE 1

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' Environmental Mr Harlin Knoll Resources 14 August 1998 Management Page 7 samples not chosen for analysis were placed with drill cuttings into a ' 55-gallon drum for disposal Chemical Analysis of Samples tSelected soil and grab ground water samples were sent to Chromalab Environmental Services, an analytical laboratory in Pleasanton, California The soil and ground water samples were analyzed for TPH-g ' using United States Environmental Protection Agency (USEPA) Method 8015M and for BTEX using USEPA Method 8020 The grab ground water ' samples, as well as soil samples suspected to be impacted on the basis of field evidence, were analyzed for oxygenate fuel additives by USEPA Method 8260 INVESTIGATION RESULTS The analytical data generated during this investigation are summarized in Table 2, laboratory reports are presented in Appendix B A quality assurance/quality control review of the analytical data has been completed by an ERM chemist, standard qualifiers assigned to the data are also presented on Table 2 ' The analytical results of the soil samples are as follows • TPH-g was detected in soil from boring B-5 at concentrations that ' ranged from 160 to 1,200 mg/kg The sample chromatograms for these analyses did not match the gasoline standard and were qualified as tentatively identified by an ERM chemist TPH-g was not ' detected in any of the soil samples analyzed from boring B-6 ' • Benzene was detected at a concentration of 0 025 mg/kg in the soil sample collected from boring B-6 at a depth of 31 feet bgs Benzene was not detected in samples analyzed from boring B-5 or the deeper ' sample from boring B-6 • Toluene was detected in soil samples collected at 25 and 40 5 feet bgs from boring B-5 and at 31 feet bgs from boring B-6 at concentrations ranging from 0 0085 to 15 mg/kg