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North State Environmental Laboratory <br /> CA FLAP# 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 /> Lab Number 00-1832 <br /> Client Western Geo-Engineers <br /> Project SANCHEZ <br /> Date Reported 12/19/2000 <br /> Gasoline, BTEX and MTBE by Methods 8015M and 8020 <br /> Anal to Method Result Unit Date Sam led Date Anal zed <br /> Sample 00-1832-04 Client ID MW4 12 /06/2000 WATER <br /> &ohne 8015M 63 ug/L 12/13 /2000 <br /> izene 8020 0 6 ug/L <br /> Ethylbenzene 8020 ND <br /> MTBE 8020 0 7 ug/L <br /> Toluene 8020 ND <br /> Xylenes 8020 ND <br /> Sample 00-1832-05 Client ID MW5 12/06/2000 WATER <br /> Gasoline 8015M 69 ug/L 12/13/2000 <br /> Benzene 8020 ND <br /> Ethylbenzene 8020 ND <br /> MTBE 8020 23 ug/L <br /> Toluene 8020 ND <br /> Xylenes 8020 2 ug/L <br /> 0 <br /> *Confirmed by GC/MS method 8260 Page 2 <br />