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i <br /> 1551 Industrial Road <br /> Sequoia San Carlos 0 <br /> (650)23 23 2-960-9600 � <br /> FAX(654612Analyticalwwwsequoialabs.cpm <br /> = <br /> Gettler-RyanlGeostrategies(1) Project: Tosco(I <br /> 6747 Sierra Court.Suite J Project Number: Unocal SS#08671,Stockton,CA Reported: <br /> Dublin CA.94568 Project Manager: Deanna Harding 09/05/01 07:36 <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 /> )JW-1 (JI-108144-02)Water Sampled:08/22/01 11:57 Received: 08/22/01 19:40 <br /> Ethanol ND 5000 ug/1 5 1080101 08/24/01 08/24/01 EPA 8260E <br /> 1.2-Dibromoethane ND 10 " <br /> 1.2-Dichloroethane ND 10 <br /> Di-isopropyl ether ND 10 <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl cert-butyl ether 510 10 " <br /> i <br /> Tett-amyl methyl ether ND 10 <br /> Tert-butyl alcohol ND 500 <br /> Surrogate: 1,2-Dichloroethane-d4 - 88.8%' 76-114 " <br /> Surrogate: Toluene-d8 97.2% 88-110 <br /> MW-2 (1-108144-03)Water Sampled: 08/22/01 10:40 Received: 08/22/01 19:40 <br /> Ethanol ND 1000 ug/l 1 1080101 08/14/01 08/24/01 EPA 8260B <br /> 1,2-Dibromoethane ND 2.0 " <br /> 1.2-Dichloroethane ND 2.0 " <br /> Di-isopropyl ether ND 2.0 <br /> Ethyl tert-butyl ether ND 2.0 <br /> Methyl terl-butyl ether ND 2.0 <br /> Tert-amyl methyl ether ND 2.0 <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate: 1,1-Dichloroethane-d4 91.4% 76-114 <br /> Surrogate: Toluene-d8 96.4% 88-110 " <br /> MW-3(1,108144-04 Water Sam led:08122/01 10:05 Received: 08/22/01 19:40 <br /> Ethanol ND 1000 ugll 1 1080101 08/24/01 08/24/01 EPA 8260B <br /> 1,2-Dibromoethane ND 2.0 " <br /> 1,2-Dichioroethane ND 2.0 " <br /> Di-isopropyl ether ND 2.0 " <br /> Ethyl tert-butyl ether ND 2.0 " <br /> Methyl tent-butyl ether ND 2.0 " <br /> Tert-amyl methyl ether ND 2.0 " <br /> { <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate: 1,2-Dichloroethane-d4 92.0% 76-114 <br /> Surrogate: Toluene-d8 91.6% 88-110 <br /> The results in this report apply to the samples anal ed in accordance with the chain a <br /> Sequoia Analytical-San Carlos P PPY P Yz ,� <br /> custody document. This analytical report must be reproduced to its entirety. <br /> Page 4 of 10 <br /> t l <br />