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404 N Wlget Lane <br /> Walnut Creek CA 94598 <br /> Sequoia FAX(925)988- 73 <br /> (925)988-96%73 <br /> Analytical www sequolalabs com <br /> Project Tosca <br /> ettler Ryan,Inc -Dubhn <br /> [, <br /> ProjectNumber Tosco#14409 Reported <br /> 6747 Sierra Court Suite J 06-Feb-01 17 21 <br /> Dublin CA,94568 Project Manager Deanna L Harding <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Lutut Units Dilution Batch Prepared Analyzed Method Notes <br /> WW4(W101522-05)Water Sampled 22-Jan-01 12 15 Received 234an-01 16 00 <br /> Ethanol ND 500 ug/1 1 1A24014 24-Jan-01 24-Jan-01 EPA 82608 <br /> ND 50 " <br /> ext-Butyl alcohol <br /> Methyl tent-butyl ether 11 20 <br /> 2 0 <br /> Di-isopropyl isopropyl ether <br /> Ethyl tent-butyl ether ND 20 <br /> 2 0 <br /> Cert-Amyl mND ethyl ether <br /> 1,2-Dichloroethane ND 20 <br /> „ <br /> Ethylene dibrarrude ND <br /> 20 „ <br /> Surrogate Dibromofluoromethane 110% 50-150 " <br /> Surrogate 1,2 Dtchloroethane-d4 <br /> 982% 50-150 " <br /> MW-5(W101522-06)Water Sampled 22-Jan-01 13 22 Received 23-Jan-01 16 00 <br /> Ethanol ND 500 ug/1 l 1A24014 24-Jan-01 24-Jan-01 EPA 8260B <br /> 50 <br /> tert-Butyl alcohol ND „ <br /> ND 20 <br /> Methyl tert-butyl ether <br /> ND 20 „ <br /> Di-isopropyl ether <br /> ND 20 <br /> t b <br /> Ethyl texutyl ether <br /> tert-Amyl methyl ether ND 2 0 „ <br /> ND 20 <br /> 1,2-Dichloroethane „ <br /> ND 20 <br /> Ethylene dibroinide <br /> ,. <br /> Surrogate Dtbromoftuoromethane 104% 50-150 <br /> Surrogate 1,2-Dichloroeihane-d4 964% 50-150 <br /> MW-6(W 101522-07)Water Sampled 22-Jan-011532 Received 23-Jan-01 16 00 <br /> Ethanol ND 500 ug/1 1 1A24014 24-Jan-01 25-Jan-01 EPA 8260B <br /> tent-Butyl alcohol ND 50 " <br /> Methyl tert-butyl ether 22 20 <br /> 2 0m <br /> � „ " n <br /> Di-isopropyl ether 1'i1J <br /> Ethyl tert butyl ether ND 20 " <br /> tert-Amyl methyl ether ND <br /> 20 " <br /> 1,2-Dichloroethane ND 20 " rt <br /> Ethylene dibromide ND 20 <br /> Surrogate Dtbromofluoromethane 123 % 50-150 „ <br /> Surrogate 1,2 Dichloroethane-d4 110% 50-150 <br /> Sequoia Analytical-Wahiut Creek The results to this report apply to the samples ama4med to accordance with the chain of <br /> custody document, Thu analytical report must be reproduced in its enttrety0 <br /> Page 4 of 12 <br /> t� <br />