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0,M%6, <br /> North State Environmental <br /> Chemical 'Aisle Disposal Trucking Consulting <br /> $0 <br /> CERTIFICATE OF ANALYSIS <br /> Quality Control/Quality Assurance <br /> Lab Number 99-0038 <br /> Client Western Geo-Engineers <br /> Project R603 / Stockton <br /> Date Reported 01/27/99 <br /> Gasoline, BTEX and MTBE by Methods 8015M and 8020 <br /> Reporting MS/MSD <br /> Oalyte Method Limit Unit Blank Recovery RPD <br /> Gasoline 8015M 50 ug/L ND 82 2 <br /> Benzene 8020 0 5 ug/L ND 105 2 <br /> Ethylbenzene 8020 0 5 ug/L ND 102 2 <br /> Toluene 8020 0 5 ug/L ND 102 1 <br /> Xylenes 8020 1 0 ug/L ND 102 2 <br /> MTBE 8020 0 5 ug/L ND 88 1 <br /> OLAP Certificate NO 1753 <br /> ev ewed and App oved <br /> Page 6 0f 6 <br /> John A Murphy,Laboratory Director <br /> P 0 Box 5624 • South San Francisco, California 94083 650- 588 - 2838 FAX 588 - 1950 <br />