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47 North State Environmental <br /> Chemical Waste Disposal Trucking Consulting <br /> CERTIFICATE OF ANALYSIS <br /> Quality Control/Quality Assurance <br /> Lab Number. 98--1103 <br /> - Client : Western Geo-Engineers <br /> Project Sanchez <br /> Date Reported. 09/21/98 <br /> Gasoline, BTEX and MTBE by Methods 8015M and 8020 <br /> Reporting MS/MSD <br /> nalyte Method Limit Unit Blank Recovery RPD <br /> Gasoline 8015M 50 ug/L ND 118 0 <br /> Benzene 8020 0 . 5 ug/L ND 126 0 <br /> Ethylbenzene 8020 0 5 ug/L ND 102 0 <br /> Toluene 8020 0 5 ug/L ND 97 0 <br /> Xylenes 8020 1 0 ug/L ND 99 0 <br /> MTBE 8020 0 5 ug/L ND 103 3 <br /> FLAP certificate No 1753 <br /> 0Reviewed and 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 />