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SUPERIOR ANALYTICAL LABORATORY, INC. <br /> 1355 FAIRFAX ST, STE, D. SAN FRANCISCO, CA 94124 • PHONE (415) 647-2081 y�y <br /> C E R T I F I C A T E O F A N A L Y S I S y0,2 <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 BENZENE, TOLUENE, ETHYL BENZENE & XYLENES <br /> by EPA SW-846 Methods 5030 and 8020 <br /> Concentration(ug/kg) <br /> LAB Ethyl <br /> # Sample Identification Benzene Toluene Benzene Xylenes <br /> ---- --------------------- ------- ------- ------- ------- <br /> 1 MIDDLE OF PILE 5 9 10 65 <br /> 2 SOUTH END ND<3 10 8 45 <br /> 3 NORTH END 4 13 10 75 <br /> ug/kg - parts per billion (ppb) <br /> Minimum Detection Limit in Soil : 3.0ug/kg <br /> QAQC Summary : <br /> Daily Standard run at 20ug/L: RPD = < 15% <br /> MS/MSD Average Recovery = 91% : Duplicate RPD = <3% <br /> Richard Srna, Ph . D. <br /> Laboratory Dir ,tor <br /> OUTSTANDING QUALITY AND SERVICE <br />