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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. : 51418 DATE RECEIVED: 11 /30/89 <br /> CLIENT: Leedshill - Herkenhoff, Inc. DATE REPORTED: 12/07/89 <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-IdentificationBenzene Toluene Benzene Xylenes <br /> 3 11-15-89-TB7-2 17 16 4. 9 23 <br /> 4 11-16-89-TB7-40 11 ND<3 4 .6 5 . 0 <br /> 5 11-16-89--TB8-5 ND<3 ND<3 ND<3 ND<3 <br /> ug/kg parts per billion (ppb) <br /> Minimum Detection Limit in Soil : 3.Oug/kg <br /> QAQC Summary : <br /> Daily Standard run at 20ug/L. RPD = < 15% <br /> MS/MSD Average Recovery = 935. Duplicate RPD = 1% <br /> Comments: <br /> RichardwSrna, Ph. D <br /> Laboratory Dire or <br /> OUTSTANDING QUALITY AND SERVICE <br />