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1455 McDowell Blvd North,Ste D <br /> Sequoia Petaluma,CA 94954 <br /> 4 (707)792-1865 <br /> 4D <br /> Iwo AnalyticalFAX(707) 42 <br /> www sequoiallabs abs com <br /> Cambria Environmental Project Equiva 10d <br /> 270 Perkins St Project Number 440 West Charter Way,Stockton Reported <br /> Sonoma CA,95476 Project Manager Aubrey Cool 12/15/00 11 11 <br /> Volatile Organic Compounds by EPA Method 8260B- Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source °/REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch OK17014-EPA 5030B [MeOH] <br /> Blank(OK17014-BLK1) _ _ _ Prepared 11/16/00 Analyzed 11/17/00 <br /> Ethanol ND 25 mg/kg�W -��— <br /> tert-Butyl alcohol ND 25 " <br /> Methyl ten-butyl ether ND 010 " <br /> Di-isopropyl ether ND 0 10 " <br /> Ethyl tert-butyl ether ND 010 " <br /> 1,2-Dtchloroethane ND 010 " <br /> tert-Amyl methyl ether ND 010 " <br /> 1,2-Dibromoethane ND 010 " <br /> Surrogate Dibromofluoromethane 145 150 980 50-150 <br /> Surrogate 1 2-Dtchloroethane-d4 250 250 100 50-150 <br /> Blank(OK17014-BLK2) _ Prepared 11/17/00 Analyzed 11/20/00 <br /> Ethanol ND 25 mg/kg <br /> tert-Butyl alcohol ND 25 " <br /> Methyl tert-butyl ether ND 010 " <br /> Di-isopropyl ether ND 010 " <br /> Ethyl tent-butyl ether ND 010 " <br /> 1,2-Dtchloroethane ND 010 " <br /> tert-Amyl methyl ether ND 010 " <br /> 1,2-Dibromoethane ND 010 <br /> - - -Surrogate Dibromofluoromethane- - 150 —-- - " — - -1 50— 100 -- 50-150 <br /> Surrogate 12-Dtchloroethane-d4 260 250 104 50-150 <br /> LCS(OK17014-BSI) _ Prepared_ 11/16/00 Analyzed 11/17/00 <br /> Methyl tert-bury]ether 224 010 mg/kg 250 896 70-130 <br /> Surrogate Dibromofluoromethane 150 " 150 100 50-150 <br /> Surrogate 12-Dtchloroethane-d4 150 150 100 50-150 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the ch� <br /> custody document This analytical report must be reproduced in its enttrery <br /> Page 29 of 32 <br />