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404 N Wiget Lane <br /> Sequoia Walnut Creek C94598 <br /> 4 (925) 988 8-9600 <br /> FAX(925)988-9673 <br /> a„) Analytical www sequoialabs com <br /> Gettler Ryan,Inc -Dublin Project "Tosco <br /> 6747 Sierra Court Suite 7 Project Number Tosco 4 11192 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 10-May-01 10 33 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note. <br /> 8-7(W)04573-01)Water Sampled 24-Apr-01 00 00 Received 26-Apr-01 16 00 <br /> Ethanol ND 500 ug/1 1 1E07003 07-May-01 07-May-01 EPA 8260B <br /> tert-Butyl alcohol ND 20 <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-Dlchloroethane ND 20 <br /> Ethylene dibromide ND 20 _ <br /> Surrogate Dibromofluoromethane 904% 50-150 " <br /> Surrogate 12-Dichloroethane-d4 836% 50-150 " <br /> B-8(W104573-02)Water Sampled 24-Apr-01 00 00 Received 26-Apr-01 16 00 <br /> Ethanol ND 500 ug/1 1 1E07003 07-May-01 07-May-01 EPA 8260B <br /> Whyutyl alcohol ND 20 <br /> l tert-butyl ether ND 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tent-butyl ether ND 20 " <br /> -._tert-Amyl methyl ether ND—2 0 — -- -- - <br /> —1;2--Uic-ttoroethane----- --ND--2-0—'-- - - — - ---- "- <br /> Ethylene dibromide ND 20 <br /> Surrogate Dibromofluoromethane 904% 50-150 <br /> Surrogate 1 2-Dichloroethane-d4 812% 50-150 " <br /> B-1 (W104573-03)Water Sampled 24-Apr-01 00 00 Received 26-Apr-01 16 00 <br /> Ethanol ND 500 ug/l 1 lE07003 07-May-01 08-May-01 EPA 8260B <br /> tert-Butyl alcohol ND 20 " <br /> Methyl tert-butyl ether 90 20 " <br /> Di-isopropyl ether 28 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 <br /> Surrogate Dibrornofluoromethane 882% 50-150 <br /> Surrogate 12-Dichloroethane-d4 810% 50-150 " <br /> ota Analytical -Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report inust be reproduced in its eutireis <br /> Page 2 of 11 <br />