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16 - - <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. : 51388 DATE RECEIVED- 11 /21 /89 <br /> CLIENT: Leedshill - Herkenhoff, Inc. DATE REPORTED: 11 /29/89 <br /> CLIENT JOB NO. : 9832 . 12 <br /> ANALYSIS FOR BENZENE, TOLUENE. ETHYL BENZENE & XYLENES <br /> by EPA Sod-846 Methods 5030 and 8020 <br /> Concentration(ug/kg ) <br /> LAB Ethyl <br /> # Sample Identification Benzene Toluene Benzene Xylenes <br /> ----- ---------------------- ------- ------- ------- ------- <br /> 3 MW5-10 ND<3 ND<3 ND<3 ND<3 <br /> 5 MW5-20 ND<3 ND<3 ND<3 ND<3 <br /> 7 MW5-30 ND<3 ND<3 ND<3 ND<3 <br /> 9 MW5-40 3 ND<3 ND<3 ND<3 <br /> 11 MW5-50 ND<3 ND<3 ND<3 ND<3 <br /> 12 MW5-55 ND<3 ND<3 ND<3 ND<3 <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 = 98% : Duplicate RPD = 6% <br /> Richard Srna, Ph. D. <br /> Laboratory Director <br /> OUTSTANDING QUALITY AND SERVICE <br />