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SUPERIOR ANALYTICAL LABORATORY, INC. Ly <br /> 1385 FAIRFAX ST, STe. D. SANFRANCISCO, 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 y�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 8 XYLENES <br /> by EPA SW-846 Methods 5030 and 8020 <br /> Concentration( ug/kg ) <br /> Ethyl <br /> LAB <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 /> OAOC 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 for <br /> OUTSTANDING QUALITY AND SERVICE <br />