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North State Environmental Laboratory CA HLAP#1753 <br />• 90 South Spruce Avenue, Suite V • South San Francisco, CA 94080 • (650) 266-4563 • FAX (650) 266-4560 <br /> CERTIFICATE OF ANALYSIS <br /> Quality Control/Quality Assurance <br /> Lab Number 00-0423 <br /> Client Western Geo-Engineers <br /> Project R603/R603-Sewer <br /> Date Reported: 04/11/2000 <br /> Diesel Range Hydrocarbons by Method 8015M <br /> 6 Metals- Cd, Cr, Cu, Ni, Pb, Zn <br /> Gasoline, BTEX and MTBE by Methods 8015M and 8020 <br /> Reporting Avg MS/MSD <br /> Analyte Method Limit Unit Blank Recovery RPD <br /> Diesel 8015M 0 05 mg/L ND 86 4 <br /> Cadmium 7130 0 . 05 mg/L ND 100/100 0 <br /> Chromium 7190 0 05 mg/L ND 80/91 13 <br /> Lead 7420 0 . 05 mg/L ND 104/102 2 <br /> Nickel 7520 0 05 mg/L ND 91/91 0 <br /> Zinc 7950 0 . 05 mg/L ND 95/106 11 <br /> Copper 7210 0 . 05 mg/L ND 104/101 3 <br /> Gasoline 8015M 50 ug/L ND 106 11 <br /> Benzene 8020 0 . 5 ug/L ND 70 5 <br /> Ethylbenzene 8020 0 5 ug/L ND 79 10 <br /> Toluene 8020 0 . 5 ug/L ND 70 5 <br /> Xylenes 8020 1 . 0 ug/L ND 84 10 <br /> MTBE 8020 50 ug/L ND 84 4 <br /> ELAP Certificate NO 1753 <br />,,Reviewed n App oved <br /> NJ <br /> Page 2 of 2 <br /> John A Murphy, boratory Director <br />