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SUPERIOR ANALYTICAL LABORATORY. INC. <br /> 1385 FAIRFAX ST.,STE, D. •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 /> CLIENT: Alton Geoscience DATE REPORTED: 02/22/90 <br /> CLIENT JOB NO. : 30-1,10 <br /> ANALYSIS FOR TOTAL PETROLEUM HYDROCARBONS <br /> by Modified EPA SW-846 Method 5030 and 8015 <br /> LAB Concentration (ug/L) <br /> Sample Identification Gasoline Range <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 5700 <br /> 6 MW-7 3400 <br /> 7 MW--B ND<50 <br /> ug/L - parts per billion (ppb) <br /> Method Detection Limit for Gasoline in Soil: 1 mg/kg <br /> I" Method Detection Limit for Gasoline in Water: 50 ug/L <br /> s <br /> f" 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 /> f �ratory Manager <br /> OUTSTANDING QUALITY AND SERVICE <br />