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ourb <br /> 4PNorth State Environmental Laboratory CA ELAP# 1753 <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 99-0718 <br /> Client Western Geo-Engineers <br /> ProOect ARC Pump & Welding/French Camp Turnpike <br /> Date Reported 05/20/99 <br /> Gasoline, BTEX and MTBE by Methods 8015M and 8020 <br /> Reporting MS/MSD <br /> alyte Method Limit Unit Blank Recovery RPD <br /> oline 8015M 50 ug/L ND 132 1 <br /> Benzene 8020 0 5 ug/L ND 113 3 <br /> Ethylbenzene 8020 0 5 ug/L ND 106 1 <br /> Toluene 8020 0 5 ug/L ND 110 3 <br /> Xvlenes 8020 1 0 ug/L ND 11.3 3 <br /> MTBE 8020 0 5 ug/L ND 101 10 <br /> ELAP Certificate NO 1753 <br />* <br /> v;,e ed ar�d (T /ed <br /> f <br /> Page 2 <br /> of 2 <br /> John A Murphy, La ratcry Director <br />