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404 N Wiget Lane <br /> Walnut Creek,CA 94598 <br /> Sequoia (925)98&-9600 <br /> FAX(925)988-9673 <br /> Analytical www sequo1a1abs corn <br /> OW <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco#6981 Reported <br /> Dublin CA,94568 Project Manager Deanna L Hardmg 20-Oct-0O 15 26 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Lrrnit Uruts Dilution Batch Prepared Analyzed Method Notes <br /> MW-I(W009589-02)Water Sampled 22-Sep-0011 15 Received 25-Sep-0015 30 <br /> Ethanol ND 500 ug4 1 0709013 03-Oct-00 03-Qct-00 EPA 8260E <br /> tert-Butyl alcohol ND 50 w n n w n <br /> Methyl tert butyl ether ND 20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 <br /> tert-Amyl methyl ether ND 20 <br /> 1,2 Dichloroethane ND 20 " <br /> Ethylene dibromtde ND 20 <br /> Surrogate Dibrom luoromedurne 960% 50-150 " <br /> Surrogate 1,2DichlorDethaneti4 860% .50-150 " <br /> MW-2(W009589-03)Water Sampled 22-Sep-001148 Received 25-Sep-0O 15 30 <br /> Ethanol ND 500 ug/l 1 0JO9013 03-Oc1-00 03-Oct-00 EPA 8260B <br /> -Butyl alcohol ND 50 <br /> yl tent-butyl ether 100 20 <br /> -Lwpropyl ether ND 20 n <br /> Ethyl tert butyl ether ND 20 <br /> tert Amyl methyl ether ND 20 <br /> 1,2-Dichloroethane ND 20 <br /> Ethylene dibromide ND 20 <br /> Surrogate Dibromofluoromed=e 152% 50-150 S-04 <br /> Surrogate 1,2Dchloroethane-d4 880% 50-130 <br /> MW4(W009589-04)Water Sampled 22-Sep-0012 27 Received 25-Sep-0015 30 <br /> Ethanol ND 500 ug/1 1 0709013 0343c1-00 034Oct-00 EPA 9260B <br /> tert-Butyl alcohol ND 50 <br /> Methyl tertbutyl ether ND 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert butyl ether ND 20 " ^ <br /> tert-Amyl methyl ether ND 20 <br /> 1,2-Dichloroethane ND 20 <br /> Ethylene dibromide ND 20 ^ w n n n n <br /> Surrogate Dibromofluoromedme 940% 50-150 " <br /> Surrogate 1,2-Dichloroethane-i4 820% 50-150 " <br /> Oia Arlsiyticd-Walnut Creek The results in this report apply to the samples analyzed in acconkox+e with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 8 of 23 <br />