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r <br /> 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. : 51356 DATE RECEIVED: 11 /10/89 <br /> CLIENT: Leedshill - Herkenhoff. Inc . DATE REPORTED: 11 /17/89 <br /> CLIENT JOB NO. : 9832 . 12 <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 MIDDLE OF PILE 2 . 7 <br /> 2 SOUTH END ND< 1 <br /> 3 NORTH END 3 . 8 <br /> mg/kg parts per million (ppm ) <br /> Minimum Detection Limit for Gasoline in Soil : 1mg/kg <br /> QAQC Summary: <br /> Daily Standard run at 2mg/L : RPD Gasoline = < 15% <br /> MS/MSD Average Recovery = 104%: Duplicate RPD = 2% <br /> Richard Srna, Ph.D. <br /> Laboratory Dir or <br /> OUTSTANDING QUALITY AND SERVICE <br />