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404 N Wiget Lane <br /> D Sequoia Walnut Creek CA 94598 <br /> 4 (925)9W9600 <br /> FAX(925)958-9673 <br /> Analytical www sequolalabs corn <br /> yan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco#4409 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 06-Feb-01 17 21 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> �Lrialyte Result Lunt Units Dilution Batch Prepared Analyzed Method Notes <br /> 11W-1 (W101522-02)Water Sampled 22-Jan-M 11 05 Received 23-Jan-01 16 00 <br /> Aianol ND 500 ug/l 1 1A24014 24-Jan-01 24-Jan-0l EPA 8260B <br /> ert-Butyl alcohol ND 50 ^ " <br /> Iethyl tort-butyl ether ND 20 <br /> J1-isopropyl ether ND 20 <br /> --thyl tent-butyl ether ND 20 <br /> rt-Amyl methyl ether ND 20 <br /> ,2-Dichloroethane ND 20 <br /> thylene dlbromlde ND 20 <br /> urrogate Dibromofluoromethane 110% 50-150 " <br /> arrogate 1,2-Dichloroethane-d4 930% 50-150 <br /> ir1W-2 (W101522-03)Water Sampled 22Jan-01 10 30 Received 23-.Tan-01 16 00 <br /> _,thanol ND 500 ug/1 1 1A24014 24-Jan-01 24-Jan-01 EPA 8260B <br /> zrt-Butyl alcohol ND 50 <br /> 4eth ert-buTyl ether ND 20 <br /> )1-1 yl ether ND 20 <br /> :thy R-butyl ether ND 20 <br /> ert-Amyl methyl ether ND 20 <br /> t,2-Dlchloroethane ND 20 <br /> 'thylene dibromlde ND 20 <br /> ,w rogate Dibromofluoromethane 113% 50-150 " <br /> surrogate 1,2 Diehloroethane-d4 974% 50-150 " <br /> JW-3(W101522-04)Water Sampled 22-Jan-01 11 40 Received 23-Jan-01 16 00 <br /> Ethanol ND 500 ug11 1 1A24014 24-Jan-01 24-Jan-01 EPA 8260B <br /> ert-Butyl alcohol ND 50 " <br /> Methyl tert-butyl ether 18 20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl#ert-butyl ether ND 20 " <br /> art-Arnyl methyl ether ND 20 <br /> 3,2-Dlchloroethane ND 20 <br /> Ethylene dibromide ND 20 <br /> -3urrogate Dibromofluoromethane 114% 50-150 " <br /> Surrogate 1,2-Dichloroethaned4 978% 50-150 " <br /> Sequoia Analytical-Walnut Creek The results to this report apply to the samples analyzed in accordance with the chain of <br /> • custody documeni 7'Ins analytical report must be reproduced in its entirety <br /> Page 3 of 12 <br />