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0,25%6, <br /> 104PNorth State Environmental <br /> Chemical Waste Disposal Trucking Consulting — <br /> CERTIFICATE OF ANALYSIS <br /> Quality Control/Quality Assurance <br /> Lab Number 98-1117 <br /> _ Client • Western Geo-Engineers <br /> Pro3ect R603 <br /> Date Reported. 10/05/98 <br /> Gasoline, BTEX and MTBE by Methods 8015M and 8020 <br /> Diesel Range Hydrocarbons by Method 8015M <br /> Reporting MS/MSD <br /> alyte Method Limit Unit Blank Recovery RPD <br /> asoline 8015M 50 ug/L ND 107 8 <br /> Benzene 8020 0 . 5 ug/L ND 114 6 <br /> Ethylbenzene 8020 0 5 ug/L ND 110 3 <br /> Toluene 8020 0 5 ug/L ND 106 3 <br /> Xylenes 8020 1 . 0 ug/L ND 125 3 <br /> MTBE 8020 0 5 ug/L ND 106 9 <br /> Diesel 8015M 0 05 mg/L ND 96 7 <br /> ELAP Certificate NO 175 <br /> Reviewed and Approved <br /> Page 2 of 2 <br /> John A Murphy,Laboratory Director <br /> P 0 Box 5624 • South San Francisco, California 94083 650- 588-2838 FAX 588 1950 <br />