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Sequoia an Carlos <br /> A Road <br /> (D (650) <br /> 5an Carlos CA 94074 <br /> �wAnalytica1 232 9600 <br /> FAX{650}232 9612 <br /> www sequoralabs com <br /> Gettler-Ryan/Geostrategtes(I) Project Tosco(1) <br /> 6747 Sterna Court, Suite J Project Number Tosco(Former BP)SS#11192 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 1]/21/01 13 29 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Leve] Result %REC Limits RPD Limit Notes <br /> Batch 1:110068-EPA 5030B JP/TJ <br /> Blank(1110068-BLK2) Prepared&Analyzed 11/19/01 <br /> Ethanol ND 500 ug/1 <br /> 1,2-Dtbromoethane ND 10 " <br /> 1,2-Dichloroethane ND 10 " <br /> Di-isopropyl ether ND 1 0 " <br /> Ethyl tent-butyl ether ND 1 0 " <br /> Methyl Cert-butyl ether ND 1 0 " <br /> Teri-amyl methyl ether ND 1 0 " <br /> Teri-butvl alcohol ND 20 " <br /> Surrogate 12-Dichloroethane-d4 259 230 104 70-130 <br /> Surrogate Toluene-d8 259 250 104 70-130 <br /> Blank(1110068-BLK3) Prepared&Analyzed 11/20/01 <br /> Ethanol ND 500 ug/I <br /> 12-Dtbromoethane ND 10 <br /> 1,2-Dichloroethane ND t 0 " <br /> Di-isopropyl ether NO 1 0 " <br /> 1h I tart-butyl ether ND 1 0 " <br /> ten-bury[ether ND 10 " <br /> i wivl methyl ether ND 1 0 " <br /> Ten-butyl alcohol ND 20 " <br /> Surrogate 12-Dichloroethane-d4 276 250 110 70-130 <br /> Surrogate Toluene-d8 250 250 100 70-130 <br /> LCS(1110068-BSI) Prepared&Analyzed 11/16/01 <br /> Methyl tert-butyl ether 490 1 0 ug/l 500 980 70-130 <br /> Surrogate 1,2-Dichloroethane-d4 446 500 892 70-130 <br /> Surrogate Toluene-d8 556 500 111 70-130 <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must he reproduced in its entirety <br /> Page 16 of 19 <br />