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0,25%0 <br /> North State Environmental <br /> ChemLcal Waste Disposal Trucking Consulting <br /> CERTIFICATE OF ANALYSIS <br /> Quality Control/Quality Assurance <br /> Lab Number: 98-342 <br /> Client : Western Geo-Engineers <br /> Project : <br /> Date Reported: 04/03/98 <br /> Gasoli.ne, BTEX and MTBE by Methods 8015M and 8020 <br /> Fuel Additives by GC/MS Method 8260 <br /> Reporting MS/MSD <br /> Analyte Method Limit Unit Blank Recovery RPD <br /> asolzne 8015M 0 . 5 mg/Kg ND 99 0 <br /> Benzene 8020 . 005 mg/Kg ND 122 2 <br /> Ethylbenzene 8020 . 005 mg/Kg ND 114 3 <br /> Toluene 8020 . 005 mg/Kg ND 114 4 <br /> Xylenes 8020 . 010 mg/Kg ND 124 8 <br /> MTBE 8020 . 005 mg/Kg ND 98 9 <br /> Gasoline 8015M 50 ug/L ND 86 3 <br /> Benzene 8020 0 . 5 ug/L ND 116 13 <br /> Ethylbenzene 8020 0 . 5 ug/L ND 107 12 <br /> Toluene 8020 0 . 5 ug/L ND 105 11 <br /> Xylenes 8020 1 . 0 ug/L ND 114 10 <br /> MTBE 8020 0 5 ug/L ND 120 12 <br /> RLAP Certificate NO 1753 <br /> Reviewed and Approved <br /> a, J/1 <br /> k--- <br /> John A.Murphy,Laboratory Director Page 3 of 3 <br /> P 0 Box 5624 • South San Francisco , California 94083 650- 588- 2838 FAX 588 - 1950 <br />