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1551 Industrial Road <br /> Sequoia San C(650 23 -960( <br /> (650)232-96110 <br /> Analytical wwscq o) labs-c 12 <br /> wwwsequoial abs.Cpm <br /> �j <br /> d.MI.'r-Ryan/Geostrategies(]) Project: Tosco(1) <br /> 6747 Sierra Court.Suite J Project Number: UNOCAL SSW 1195;LATHROP,CA Reported: <br /> Dublin CA.94568 Project Manager: Deanna Harding 08/28/01 07:22 <br /> Volatile Organic S Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilulion Batch Prepared Analyzed Method Notes <br /> MW-1 (L308074-02)\Tater Sampled: 08/10/01 14:55 Received:08/10/01 18:55 <br /> Ethanol ND 10000 ugll 10 1080068 08/16/01 08/16/01 EPA 8260E <br /> 1,2-Dibromoethane ND 20 <br /> 1.2-Dichloroethane ND 20 <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 <br /> Methyl terl-butyl ether 2000 20 " <br /> Ten-amyl methyl ether ND 20 " <br /> Ten-butyl alcohol ND 1000 " <br /> Surrogate: 1,2-Dichloroethane-d4 107% 76-114 <br /> Surrogate: Toluene-d8 106% 88-110 " <br /> MW 2 (L]08074-03)W:filer Sampled: 08/10/01 15:35 Received: 08/10/01 18:55 <br /> Ethanol ND 8300 ug/l 8.33 1080068 08/16/01 08/17/01 EPA 8260B <br /> 1,2-Dibromoethane ND 17 " <br /> 1,2-Dichloroethane ND 17 <br /> opyIether ND 17 <br /> EtFiyf'tert-butyl ether ND 17 <br /> Methyl ter(-butyl ether 1200 17 <br /> Ten-amyl methyl ether ND 17 " <br /> Teri-butyl alcohol ND 830 <br /> Surrogate:1,2-Dichloroethane-d4 107% 76-114 <br /> Surrogate: Toluene-d8 108% 88-110 " <br /> MW-3(L7080'74-04)WRier Sam pled:08110/0116:50 Received: 08110/0118:55 <br /> Ethanol ND 33000 ug/I 33.33 1080068 08/16/01 08/16/01 EPA 8260B. <br /> 1,2-Dibromoethane ND 67 <br /> 1,2-Dichloroethane ND 67 " <br /> Di-isopropyl ether ND 67 <br /> Ethyl tent-butyl ether ND 67 " <br /> Methyl tert-butyl ether 5200 67 <br /> Teri-amyl methyl ether ND 67 <br /> Tert-butyl alcohol ND 3300 " <br /> Surrogate: 1,2-Dichloroethane-d4 106% 76-114 " <br /> Surrogate: Toluene-d8 107% 88-110 " <br /> i <br /> Set"-.ata 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 7 of 22 <br /> f <br />