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45%,, <br /> or# North State Environmental Laboratory C4 ELAP# 1751 <br /> 90 South Spruce Avenue Suite V • South San Francisco CA 94080 • (650) 266-4563 FAX (650) 266-4560 <br /> C E R T I F I C A T E O F A N A L Y S I S <br /> Quality Control/Quality Assurance <br /> Lab Number: 99-1413 <br /> Client Western Geo-Engineers <br /> Pro]ect • ARC Pump & Welding French Camp Turnpike <br /> Date Reported 09/24/99 <br /> Gasoline, BTEX and MTBE by Methods 8015M and 8020 <br /> Reporting Avg MS/MSD <br /> nalyte Method Limit Unit Blank Recovery RPD <br /> asoline 8015M 50 ug/L ND 121 2 <br /> Benzene 8020 0 . 5 ug/L ND 97 2 <br /> Ethylbenzene 8020 0 5 ug/L ND 108 2 <br /> Toluene 8020 0 5 ug/L ND 105 1 <br /> Xylenes 8020 1 0 ug/L ND 114 3 <br /> MTBE 8020 0 . 5 ug/L ND 95 4 <br /> /117� <br /> FLAP Certifa.gate NO 1753 <br /> Reviewed an A proved <br /> Page 2 of 2 <br /> John A Murphy, Laboratory Director <br />