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North State Environmental Laboratory <br /> . CA ELAp#1753 <br /> 90 South Spruce Avenue, Suite V • South San Francisco, CA 94080 26 <br /> (650) 266-4563 FAX (650) 6-456060 <br /> C E R T I F I C A T E Q F A N A L Y S I S <br /> Quality Control/Quality Assurance <br /> Lab Number 00-0998 <br /> Client Compliance & Closure, Inc <br /> Project Qulk Stop #121/ 12118-4 <br /> Date Reported- 07/12/2000 <br /> Gasoline and BTEX by Methods 8015M and 8020 <br /> Reporting Avg MS/MSD <br /> Analyte Method Limit Unit Blank Recovery RPD <br /> Alftk- <br /> soline 8015M 50 ug/L ND 125 1 <br /> Benzene 8020 0 5 ug/L ND 98 3 <br /> Ethylbenzene 8020 0 5 ug/L ND 113 0 <br /> Toluene 8020 0 5 ug/L ND 107 0 <br /> Xylenes 8020 1 0 ug/L ND 112 3 <br /> ELAP Certificate No 17 3 <br /> Reviewed and approved <br /> John A Murphy, Laboratory Director Page 3 of 3 <br />