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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. : 51356 DATE RECEIVED: 11/10/89 <br /> CLIENT: Leedshiil - 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 /> Gasoline <br /> # Sample Identification Range <br /> g <br /> ---- ----------------------- <br /> 1 MIDDLE OF -------------- <br /> PILE 2 . 7 <br /> 2 SOUTH END ND<1 <br /> ' 3 NORTH END 3 .8 <br /> m9/kg - parts per million (Ppm) <br /> Minimum Detection Limit for Gasoline in Soil : lmg/kg <br /> ' QAQC Summary : <br /> Daily Standard run at 2mg/L: RPD Gasoline = <15% <br /> ' MS/DASD Average Recovery = 104%: Duplicate RPD = 2% <br /> Richard Srna, Ph. D. <br /> Laboratory Dir or <br /> OUTSTANDING OUALITY AND SERVICE <br />