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North State Environmental Laboratory CA ELAP#11753 <br /> 90 South Spruce Avenue Suite V - South San Francisco, CA 94080 - (650) 266-4563 - FAX (650) 266-4560 <br /> CERTIFICATE OF ANALYSIS <br /> Lab Number 00-1831 <br /> Client Western Geo-Engineers <br /> Project ARC PUMP & W <br /> Date Reported 12 /18/2000 <br /> Gasoline, BTEX and MTBE by Methods 8015M and 8020 <br /> z-nal to Method Result Unit Date Sampled Date Analyzed <br /> Sample 00-1831-01 Client ID MWl 12 /06/2000 WATER <br /> Gasoline 8015M 20000 ug/L 12/13/2000 <br /> Pzene 8020 5700 ug/L <br /> hlyl-benzene 8020 750 ug/L <br /> MTBE 8020 44 ug/L <br /> Toluene 8020 42 ug/L <br /> Xylenes 8020 640 ug/L <br /> Sample 00-1831--02 Client ID MW2 12/06/2000 WATER <br /> Gasoline 8015M 2700 ug/L 12/13/2000 <br /> Benzene 8020 680 ug/L <br /> Ethylbenzene 8020 210 ug/L <br /> MTBE 8020 14 ug/L <br /> Toluene 8020 9 ug/L <br /> y_/lenes 8020 110 ug/L <br /> Sample 00-1831-03 Client ID MW3 12/06/2000 WATER <br /> Gasoline 8015M 12000 ug/L 12/13/2000 <br /> Benzene 8020 1300 ug/L <br /> methylbenzene 8020 870 ug/L <br /> T-ITBE 8020 *61 ug/L <br /> Toluene 8020 27 ug/L <br /> Xylenes 8020 870 ug/L <br /> 0 <br /> *Confirmed by GUMS method 8260 Page i <br />