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4 <br /> q <br /> • <br /> Gettler-11yan/Geostrategies(1) Project Tosco(I) <br /> 6747 Sierra Court, Suite J Project Number Unocal Circle K SS#f 1205,Lathrop,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 08/03/01 13 39 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Lunn Units Dilution Batch Prepared Analyzed Method Note <br /> MW-1 (L107183-02)Water Sampled 07/191011305 Received 07/19/01 18 50 <br /> Ethanol ND 10000 ug/1 10 1070113 07/25/01 07/25/01 EPA 82608 <br /> 1,2-Dibromoethane ND 20 07/25/01 " <br /> 1,2-Dichloroethane ND 20 " <br /> Di-isopropyl ether ND 20 ' <br /> Ethyl ten-butyl ether ND 20 " 07/25101 n <br /> Methyl tert-butyl ether ND 20 07/25/01 <br /> Ten-amyl methyl ether ND 20 " <br /> Teri-butyl alcohol ND 1000 " <br /> Surrogate 1 2-Dichloroethane-d4 105 % 76-114 " <br /> Surrogate Toluene-d8 104 % 88-110 " <br /> MW-2(L107183-03)Water Sampled 07/19/01 12 30 Received 07/19/01 18 50 <br /> Ethanol ND 1000 ug/1 1 1070113 07/25/01 07/25/01 EPA 8260B <br /> " •' <br /> bromoethane ND 20 <br /> chloroethane ND 20 <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 <br /> Methyl cert-butyl ether 76 20 <br /> " <br /> Teri-amND 20yl methyl ether „ <br /> Tert-butyl alcohol ND 100 ' <br /> Surrogate 1,2-Dichloroethane-d4 107% 76-114 <br /> Surrogate Toluene-d8 105% 88-110 <br /> MW-3(L107183-04)Water Sampled 07/19/0111 55 Received 07/19/01 18 50 <br /> Ethanol ND 1000 USI] 1 1070113 07/24/01 07/24/01 EPA 8260B <br /> 1,2-Dibromoethane ND 20 <br /> 1,2-Dichloroethane ND 20 <br /> ., <br /> DiaND 2 0sopropyl ether <br /> Ethyl ten-butyl ether ND 20 n <br /> " <br /> Methyl tei-t-buryND 20!ether <br /> Ten-amyl methyl ether ND 20 <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1 2-Dichloroethane-d4 106% 76-114 n <br /> Surrogate Toluene-d8 103% 88-110 " <br /> oia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 6 of 14 <br />