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a <br /> i <br /> SUPERIOR ANALYTICAL LABORATORY, INC. <br /> 1555 BURKE, UNIT I . SAN FRANCISCO, CA 94124 - PHONE (415) 647-2081 <br /> C E R T I F I C A T E O F A N A L Y S I S <br /> LABORATORY NO. : 80562 DATE RECEIVED: 02/16/90 <br /> CLIEtiT : Alton Geoscience DATE REPORTED: 02/22/90 <br /> CLIENT JOB NO. : 30-140 <br /> ANALYSIS FOR TOTAL PETROLEUM HYDROCARBONS <br /> by Modified EPA SW-846 Method 5030 and 8015 <br /> LAB Concentration ( ug/L) <br /> 4 Sample Identification Gasoline Range <br /> -------------- <br /> 1 MW-1 ND<50 <br /> 2 MW-2 50 <br /> 3 MW-4 1800 <br /> 4 MW-5 1900 <br /> 5 MW-6 5 700 <br /> 6 MW-8 3400 <br /> 7 MW-7 ND<50 <br /> ug/L - parts per billion ( ppb ) <br /> Method Detection Limit for Gasoline in Soil : 1 mg/kg <br /> Method Detection Limit for Gasoline in Water : 50 ug/L <br /> QAQC Summary : <br /> Daily Standard run at 2mg/L: RPD Gasoline = 0 . 2% <br /> MS/MSD Average Recovery = 101%. Duplicate RPD = 1% <br /> Edward R. Morales <br /> /4 <br /> Laborat'o Manager <br /> OUTSTANDING QUALITY AND SERVICE <br /> c I <br />