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a <br /> SUPERIOR ANALYTICAL LABORATORY, INC. <br /> 1385 FAIRFAX ST.,STE. D. • SAN FRANCISCO. CA 94124 • PHONE (415) 6•7-2081 <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. : 80562 DATE RECEIVED: 02/16/90 <br /> CLIENT: Alton Geoscience DATE REPORTED: 02/22/90 <br /> CLIENT JOB NO. : 30-140 <br /> ANALYSIS FOR BENZENE, TOLUENE, ETHYL BENZENE & XYLENES <br /> - by EPA SW-846 Methods 5030 and 8020 <br /> Concentration(ug/L) <br /> LAB Ethyl <br /> Sample Identification Benzene Toluene Benzene Xylenes <br /> 1 MW-1 ND<0.3 ND<0.3 ND<0.3 ND<0.3 <br /> 2 MW-2 43 0.8 0. 7 1 .6 <br /> 3 MW-4 370 43 130 98 <br /> 4 MW-5 220 9.4 65 150 <br /> `2 5 MW--6 220 21 330 250 <br /> �,. 6 MW-7 9.4 7.3 70 170 <br /> 7 p4W--8 ND<0.3 ND<0.3 ND<0.3 ND<0.3 <br /> c <br /> ug/L - parts per billion {ppb} <br /> is ug/kg - parts per billion (ppb) <br /> Method Detection Limit in Soil: 3 ug/kg <br /> Method Detection Limit in Water: 0.3 ug/L <br /> QAQC Summary: <br /> i <br /> Daily Standard run at 20ug/L: RFD = <15% <br /> MS/MSD Average Recovery = 100 %: Duplicate RPD = <1% <br /> f <br /> Edward R. rales <br /> aborti r Manager . <br /> f -r <br /> OUTSTANDING QUALITY AND SERVICE <br />