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1551 Industrial Road <br /> Sequoia San Carlos CA94070 <br /> {650}23232-960-9bOD <br /> Analytical ww.seq 0) labs-c 12 <br /> +vwwsequoialabs.com <br /> cx`"' Ir-RyanlGeostrategies(]) Project: Tosco(l) <br /> 6747 Sierra Court,Suite J Project Number: UNOCAL SSM 1195,LATHROP,CA Reported- <br /> Dublin CA,94568 Project Manager: Deanna Harding 08/28/0) 07:22 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> A7M'-8(1.,108074-08)Mater Sampled:08/10/01 12:26 Received: 08/10/01 18:55 <br /> Ethanol ND 20000 ug/l 20 1080068 08/16/01 08/17/01 EPA 826013 <br /> 1,2-Dibromoethane ND 40 " <br /> 1,2-Dichloroethane ND 40 " <br /> Di-isopropyl ether ND 40 " <br /> Ethyl tert-butyl ether ND 40 " <br /> Methyl tert-butyl ether 2900 40 " <br /> Teri-amyl methyl ether 71 40 " <br /> Tert-butyl alcohol ND 2000 " <br /> Surrogate: 1,2-Dichloroethane-d4 103% 76.114 " <br /> Surrogate: Toluene-d8 109 NO 88-110 " <br /> )'11V-9(LI08074-09)Water Snmpled: 08/10/01 11:43 Received:08/10/01 18:55 <br /> Ethanol ND 1000 ug/1 1 1080067 08/15/01 08/16/01 EPA 8260B <br /> 1,2-Dibromoethane ND 2.0 1, 1. <br /> " <br /> 1,2.sT7ichloroethane ND 2.0 <br /> ether <br /> ND 2.0 „ <br /> EQ(tert-butyl ether ND 2.0 " <br /> Methyl ter]-butyl ether ND 2.0 " <br /> Tert-amyl methyl ether ND 2.0 " <br /> Teri-butyl alcohol ND 100 " <br /> Surrogate: 1,2-Dichloroeihane-d4 110% 76-114 " <br /> Surrogate:Toluene-d8 107% 88-110 " <br /> MM'-10(L108074-10)Mater Sampled: 08110/03 11:07 Received: 08/10/01 18:55 <br /> Ethanol ND 170000 ug/1 166.67 1080066 08/15/01 08/15/01 EPA 8260B <br /> 1,2-Dibromoethane ND 330 " " " " " " <br /> 1,2-Dichloroethane ND 330 " <br /> Di-isopropyl ether ND 330 " <br /> Ethyl ter]-butyl ether ND 330 <br /> Methyl tert-butyl ether 21000 330 " <br /> Tert-amyl methyl ether ND 330 " <br /> Tert-butyl alcohol ND 17000 " <br /> Surrogate: 1,2-Dichloroethane-d4 101 % 76-114 " <br /> Surrogate: Toluene-d8 109% 88-110 <br /> 1^ <br /> S' ,.]iia 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 9 of 22 <br />