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404 N.W1getLane <br /> Sequoia Walnut Creek,CA 94598 <br /> 4ID (925)988-9600 <br /> Analytical FAX equo 4abs.co 3 <br /> www.sequoialabs.com <br /> Gettler Ryan, Inc. - Dublin Project: Tosco <br /> 6747 Sierra Court Suite J Project Number: Tosco# 11195 Reported: <br /> Dublin CA,94568 Project Manager: Doug Lee 13-Mar-02 08:19 <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 2CO6006-EPA 5030B(MeOH) <br /> Blank(2C06006-BLKI) Prepared:05-Mar-02 Analyzed:06-Mar-02 <br /> > thanol ND 25 mg/kg <br /> tert-Butyl alcohol ND 2.5 " <br /> Methyl tert-butyl ether(MTBE) ND 0.10 " <br /> Di-isopropyl ether ND 0.10 " <br /> Ethyl tent-butyl ether ND 0.10 " <br /> 12-Dichloroethane ND 0.10 " <br /> tett-Amyl methyl ether ND 0.10 " <br /> 1,2-Dibromoethane ND 0.10 " <br /> Surrogate:Dibromoiluorornethane 2.95 " 2.50 118 50-150 <br /> Surrogate:1,2-Dichloroethane-d4 2.47 112,50 99 50-150 <br /> LCS(2C06006-BSI) Prepared: 05-Mar-02 Analyzed:06-Mar-02 '= <br /> Methyl tett-butyl ether(MTBE) 2.09 0.10 mg/kg 2.50 84 70-130 <br /> Surrogate:Dibromafluoromelhane 2.20 2.50 88 50-150 <br /> Surrogate,1,2-Dichloroethane-d4 2.74 112.50 110 50-150 <br /> Matrix Spike(2C06006-MS1) Source:W202395-05 Prepared:05-Mar-02 Analyzed: 07-Mar-02 <br /> Methyl tett-butyl ether(MTBE) 2.49 0.10 mg/kg 2.50 ND 100 60-140 <br /> Surrogate:Dibromofluoromethane 2.42 112.50 97 50-150 <br /> Surrogate:l,2-Dichloroethane-d4 2.80 " 2.50 112 50-150 <br /> Matrix Spike Dup(2C06006-MSD1) Source:W202395-05 Prepared:05-Mar-02 Analyzed:07-Mar-02 <br /> Methyl tert-butyl ether(MTBE) 2.40 0.10 mg/kg 2.50 ND 96 60-140 4 25 <br /> Surrogate. Dibromofluoromethane 2,31 " 2.50 92 50-150 <br /> Surrogate: 1,2-Dichloroethane-d4 3.02 112.50 121 50-150 <br /> Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the;' ''yof <br /> eustody document. 77ris analytical report must be reproduced in its L Jy, <br /> 7of8 <br />