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North State Environmental Laboratory CA FLAP# 1751 <br /> 90 South Spruce ANenue 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 99-1890 <br /> Client Western Geo-Engineers <br /> Project Sanchez Country Club Blvd <br /> Date Reported 12/15/99 <br /> Gasoline, BTEX ard MTBE by Methods 8015M and 8020 <br /> Reporting Avg MS/MSD <br /> Onalyte Method Limit Unit Blank Recovery RPD <br /> Gasoline 8015M 50 ug/L ND 100 1 <br /> Benzene 8020 0 5 ug/L ND 95 3 <br /> Ethylbenzene 8020 0 5 ug/L ND 106 0 <br /> Toluene 8020 0 5 ug/L ND 101 4 <br /> Xylenes 8020 1 0 ug/L ND 111 1 <br /> MTBE 8020 0 5 ug/L ND 86 4 <br /> ELAP Certificate NO 1753 <br /> Reviewed n A proved <br /> r <br /> Page 3 of 3 <br /> John A Murphy,t#oratory LDicto <br />