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North State Environmental <br /> .05%h, Chemical Haste Disposal Trucking Consulting <br /> 10 <br /> CERTIFICATE OF ANALYSIS <br /> Quality Control/Quality Assurance <br /> Lab Number 98-1641 <br /> Client western Geo-Engineers <br /> Project . Sanchez / 1876 Country Club Blvd <br /> Date Reported 12/30/98 <br /> Gasoline, BTEX and MTBE by Methods 8015M and 8020 <br /> Reporting MS/MSD <br /> nalyte Method Limit Unit Blank Recovery RPD <br /> asoline 8015M 50 ug/L ND 112 12 <br /> Benzene 8020 0 . 5 ug/L ND 83 6 <br /> Ethylbenzene 8020 0 5 ug/L ND 95 7 <br /> Toluene 8020 0 5 ug/L ND 78 7 <br /> Xylenes 8020 1 0 ug/L ND 93 7 <br /> MTBE 8020 0 5 ug/L ND 85 22 <br /> ELAP Certificate NO 1753 <br /> Reviewed n Approved <br /> Page 3 of 3 <br /> John A Murphy, Laboratory Director <br /> P 0 Box 5624 • South San Francisco California 94083 • 650 - 588 - 2838 FAX 588 - 1950 <br />