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North 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 /> CERTIFICATE OF ANALYSIS <br /> Quality Control/Quality Assurance <br /> Lab Number 99-0720 <br /> Client : Western Geo-Engineers <br /> Project Country Club Blvd / Sanchez Property <br /> Date Reported 05/21/99 <br /> Gasoline, BTEX and MTBE by Methods 8015M and 8020 <br /> Reporting MS/MSD <br /> alyte Method Limit Unit Blank Recovery RPD <br /> 7 _ cline 8015M 50 ug/L ND 94 2 <br /> Benzene 8020 0 5 ug/L ND 106 1 <br /> Ethylbenzene 8020 0 5 ug/L ND 97 2 <br /> Toluene 8020 0 . 5 ug/L ND 100 1 <br /> Xylenes 8020 1 0 ug/L ND 92 7 <br /> MTBE 8020 0 5 ug/L ND 124 8 <br /> ELAP Certificaze NO 1753 <br /> viewed and proved <br /> Page 3 of 3 <br /> John A nurphy,Lab a ory Director <br />