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rt j <br /> 819 Striker Avenue Suite 8 <br /> Sequoia Sacramento,)9 95634 <br /> (9!6)921-9600 <br /> Analytical FAX(916)921 <br /> www sequoialabs com coin <br /> NW'SECOR International-Rancho Cordova Project Tosco 1205,Lathrop,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 06/14/02 11 28 <br /> Gasoline\BTEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Lirrut Units Dilution Batch Prepared Analyzed Method Notes <br /> GP-3-10'(S206079-06)Sad Sampled 06/05/02 12 05 Received 06/06/02 17 35 <br /> Ethanol ND 020 mg/kg 1 2060131 . 06/12/02 06/13/02 EPA 8260B <br /> Tert-butyl alcohol ND 0 050 " <br /> Methyl tert-butyl ether ND 00050 " <br /> Di-isopropyl ether ND 00050 " <br /> Ethyl tert-butyl ether ND 00050 " <br /> Tert-amyl methyl ether ND 00050 " <br /> 1,2-Dichloroethane ND 00050 " <br /> 1,2-Dibromoethane(EDB) ND 00050 <br /> Benzene ND 00050 " <br /> Ethylbenzene ND 00050 " <br /> Toluene ND 00050 " <br /> Xylenes(total) ND 00050 " <br /> Gasoline(C6-C10) ND 10 " <br /> Surrogate 1,2-DCA-d4 100% 60-140 " <br /> Surrogate Toluene-d8 104% 60-140 " <br /> rro ate 4-BFB 120% T60-140 <br /> GP-4-10 d _ <br /> (5206079-08)So _Sampled_06/05/02 13 15 Received 06/06/02 17 35 <br /> Ethanol ND 020 mg/kg 1 2060131 06/12/02 06/13/02 EPA 8260E <br /> Tert-butyl alcohol ND 0 050 " <br /> Methyl tert-butyl ether ND 00050 " <br /> Di-isopropyl ether ND 00050 " <br /> Ethyl tert-butyl ether ND 00050 <br /> Tert-amyl methyl ether ND 00050 <br /> 1,2-Dichloroethane ND 00050 " <br /> 1,2-Dibromoethane(EDB) ND 00050 " <br /> Benzene ND 00050 " <br /> Ethylbenzene ND 00050 " <br /> Toluene ND 00050 <br /> Xylenes(total) ND 00050 <br /> Gasoline(C6-C10) ND 10 <br /> Surrogate 12-DCA-d4 102% 60-140 " <br /> Surrogate Toluene-d8 101 % 60-140 " <br /> Surrogate 4-BFB 115% 60-140 " <br /> quoia Analytical-Sacramento The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Thu analytical report must be reproduced in its entirety <br /> Page Page 3 of 12 <br />