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4 U 1 <br /> 404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> (925)98a-9600 <br /> FAX(925)988-9673 <br /> Analytical ,�,W,Nuo'alal>s wtYt <br /> lerRyan,lnc Dublin Project Chevron <br /> Ryan, <br /> 6747 Sierra Court Suite J Project Number Chevron#9-9840 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 10-Jul-00 17 52 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia Analytical - Walnut Creek <br /> Reporting <br /> Analyte Result Lrmrt Units Dilutton Batch Prepared Analyzed Method Notes <br /> MW-1 (W006568-02)Water Sampled 22-Jun-0019 22 Received 23-Jun-00 10 54 <br /> Ethanol ND 500 ug/l 1 OG01003 01-Jul-00 01-Jul-00 EPA 8260A <br /> tert-Butyl alcohol ND 100 <br /> Methyl Cert-butyl ether 240 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 <br /> tent-Amyl methyl ether 12 20 " <br /> Surrogate Dibromofluoromethane 100% 50-150 " <br /> Surrogate 1,2-Dichloroethane-l4 940% 50-150 " <br /> MW-2(W006568-03)Water Sampled 22-Tun-00 18 17 Received 23-0un-00 10 54 <br /> Ethanol ND 500 ugn 1 0GO1003 O t-Jul-00 01-Jul-00 EPA 8260A <br /> tert-Butyl alcohol ND 100 " <br /> Methyl tert-butyl ether 71 20 " <br /> Di-isopropyl ether ND 20 ~ <br /> E rt-butyl ether ND 20 <br /> teiRWyl methyl ether ND 20 " <br /> Surrogate Dibromofluoromethane 940% 50-150 " <br /> Surrogate 1,2 Dichloroethane-d4 940% 50-150 " <br /> MW-3(W006568-04)Water Sampled 22-Jun-0016 54 Received 23-Jun-00 10 54 <br /> Ethanol ND 500 ug/1 1 0001003 01-Jul-00 01-Jul-00 EPA 8260A <br /> tent-Butyl alcohol ND 100 <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 /> Surrogate Dibromofluoromethane 960% 50-150 " <br /> Surrogate 1,2 Dichloroethane-d4 860% 50-150 " <br /> Se��tQia Analytical-Walnut Creek The results in this report apply to the samples analysed in accordance with the chem of <br /> . custody document This analytical report must be reprahrced in its entirety <br /> Page 4 of 11 <br />