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North State Environmental <br /> Chemical Waste Disposal Trucking Consulting <br /> CERTIFICATE OF ANALYSIS <br /> Quality Control/Quality Assurance <br /> - Lab Number - 98-1 .02 <br /> Client * Western Geo-Engineers <br /> Pro3ect R--603 <br /> Date Reported 09/22/98 <br /> Gascli.ne, BTEX and MTBE by Methods 8015M and 8020 <br /> Reporting MS/MSD <br /> Onalyte Method Limit Unit Blank Recovery RPD <br /> Gasoline 8015M 50 ug/L ND 121 10 <br /> Benzene 8020 0 5 ug/L ND 100 3 <br /> Ethylbenzene 8020 0 5 ug/L ND 109 3 <br /> Toluene 8020 0 5 ug/L ND 100 0 <br /> Xylenes 8020 1 0 ug/L ND 101 0 <br /> MTBE 8020 0 5 ug/L ND 102 3 <br /> ELAP Certificate N 1 53 <br /> eviewed and APP <br /> ed <br /> John A Murphy, Laboratory Dire or .� Page 6 of 6 <br /> P 0 Box 5624 • South San Francisco , California 94083 650-588 - 2838 FAX 588 - 1950 <br />