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r � <br /> da W <br /> -� SUPERIOR ANALYTICAL LABORATORIES, INC, <br /> 825 ARNOLD.STE. 114 + MARTINEZ,CALIFORNIA 94553- (415) 229.1512 DOHS 1319 <br /> DOHS #220 <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. : 81171 DATE RECEIVED: 07/13/90 <br /> —CLIENT: Alton Geoscience DATE REPORTED: 07/21/90 <br /> CLIENT JOB NO. : 30-140 <br /> - ANALYSIS FOR BENZENE, TOLUENE, ETHYL BENZENE & XYLENES <br /> by EPA SW-846 Methods 5030 and 8020 <br /> tion(ug/L) <br /> Concentra <br /> -CAB Ethyl <br /> —0-- Sample-Identification Benzene Toluene Benzene Xylenes <br /> 1 MW-2W 0.4 1 .3 0.5 15 <br /> MW-4W 510 41 220 320 <br /> MW-5W 140 9.4 130 300 <br /> MW-6W 590 18 1100 750 <br /> 5 MW-7W ND<0.3 ND<0.3 ND<0.3 ND<0.3 <br /> :6 MW-8W 27 13 360 1000 <br /> —7 P-1W ND<0.3 ND<0.3 1 .3 0.6 <br /> 8 P-2W ND<0.3 ND<0.3 ND<0.3 ND<0.3 <br /> k.w <br /> "1g/L - parts per billion (-jpb) <br /> Method Detection Limit in Water: 0.3 ug/L <br /> QAQC Summary; <br /> Daily Standard rue at 20ug/L; RPD = <15% <br /> MS/MSD Average Recovery = 101 %; Duplicate RPD = <13% <br /> Ric rd Srna, Ph.D. <br /> Laboratory Manager . <br /> OUTSTANDING QUALITY AND SERVICE <br />