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Sequoia <br />� Analytical <br />404 N Wiget Lane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequolalabs com <br />Gettler Ryan, Inc - Dublin Project Chevron <br />6747 Sterna Court Suite J Project Number Chevron 4 9-5775 Reported <br />Dublin CA, 94568 Project Manager Deanna L Harding 29 -Jul -00 17 31 <br />Volatile Organic Compounds by EPA Method 8260A <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br />MW -12B (WO07484-17) Water Sampled 24 -Jul -0009 40 <br />Received 25-1u1-0014 30 <br />Ethanol <br />ND <br />500 <br />ugn 1 OG26017 27 -Jul -00 27 -Jul -00 EPA 8260A <br />tert-Butyl alcohol <br />ND <br />100 <br />" <br />Methyl tent -butyl ether <br />ND <br />20 <br />" <br />Di -isopropyl ether <br />ND <br />20 <br />" <br />Ethyl tent -butyl ether <br />ND <br />20 <br />" <br />tent -Amyl methyl ether <br />ND <br />20 <br />" <br />1,2-Dichloroethane <br />ND <br />20 <br />" <br />Ethylene dibronude <br />ND <br />20 <br />Surrogate Dlbromo}luoromethane <br />106% <br />50-150 <br />Surrogate 1,2-Drchlomethane-d4 <br />102% <br />50-150 " <br />MW -13 (W007484-18) Water Sampled <br />24Ju1-0011 41 <br />Received 25 -Jul -00 14 30 <br />Ethanol <br />ND <br />500 <br />ugA 1 OG26017 27 -Jul -00 27 -Jut -00 EPA 8260A <br />tent -Butyl alcohol <br />ND <br />100 <br />M tent -butyl ether <br />ND <br />20 <br />" <br />DAINFropyl ether <br />ND <br />20 <br />" <br />Ethyl tert butyl ether <br />ND <br />20 <br />" <br />tort -Amyl methyl ether <br />ND <br />20 <br />1,2-Dichloroetime <br />ND <br />20 <br />Ethylene dibromide <br />ND <br />20 <br />" <br />Surrogate Dtbromofluoromed=e <br />106% <br />50-150 " <br />Surrogate 1,2-D4chloroed=e-d4 <br />106% <br />50-150 <br />MW -14 (W007484-19) Water Sampled <br />24Ju1.0012 25 <br />Received 25 -Jul -00 14 30 <br />Ethanol <br />ND <br />2500 <br />ugA 5 0026017 27 -Jul -00 27 -M -N EPA 8260A <br />teat Butyl alcohol <br />ND <br />500 <br />Methyl tert-butyl ether <br />2100 <br />20 <br />" 10 " <br />Di -Isopropyl ether <br />ND <br />10 <br />S <br />Ethyl tent -butyl ether <br />230 <br />10 <br />tert-Amyl methyl ether <br />27 <br />10 <br />" <br />1.2 Dnchlomethane <br />ND <br />10 <br />Ethylene dibromide <br />ND <br />10 <br />" <br />Surrogate Dibromofluoromedu me <br />104% <br />50-150 " <br />Surrogate 42 Dtchloroethane-d4 <br />106% <br />50-150 " <br />StW Analytical - Walnut Creek <br />The results in this report apply to the samples analysed in accordance with the chain of <br />custody docmnent. Tins analytical report must be reproduced to its entirety <br />Page 14 of 26 <br />