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Superior Precision Ana4erica/, Inc. <br /> 825 Arnold Drive Suite 1 14 • Martinez California 94553 ■ (510) 229-1512 / fax (5 10) 229-1526 <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. - 83945 DATE RECEIVED 09/19/91 <br /> CLIENT GROUNDWATER TECHNOLOGIES INC. DATE REPORTED. 09/20/91 <br /> CLIENT JOB NO : 020301211-051003 <br /> ANALYSIS FOR TOTAL PETROLEUM HYDROCARBONS <br /> by MODIFIED EPA SW-846 METHOD 5030 and 8015 <br /> LAB Concentration (mg/Kg) <br /> # Sample Identification Gasoline Range <br /> 1 TRENCH-1 ND< 1 <br /> 2 TRENCH-2 2100 <br /> mg/Kg - parts per million ( ppm) <br /> Method Detection Limit for Gasoline in Soil 1 mg/Kg <br /> QAQC Summary <br /> Daily Standard run at 2mg/L RPD Gasoline = < 15 <br /> MS/MSD Average Recovery = 99 %: Duplicate RPD 1 2,,,, � / - <br /> Richard Srna, Ph . D. <br /> Laboratory Director <br /> Certified Laboratories <br />