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Sequoia 404 N. , CA Lane <br /> (INWalnut Creek, CA 94598 <br /> Analytical FAX`925 988-9673 <br /> (925})988-9673 <br /> settler Ryan,Inc.-Dublin Project: Unocal <br /> 6747 Sierra Court Suite J Project Number: Unocal SS# 11195 Reported: <br /> Dublin CA,94568 Project Manager: Deanna L.Harding 09-Sep-99 17:35 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia Analytical -WaInut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MVV-8(W908271-08)Water Sampled: 11-Aug-99 12:32 Received: 12-Aug-99 14:25 <br /> Ethanol ND 500 ug/1 1 9H25009 24-Aug-99 24-Aug-99 EPA 8260A <br /> tert-ButyI alcohol ND 100 " 11 11 •' " <br /> Methyl tert-butyl ether 27 2.0 <br /> Di-isopropyl ether ND 2.0 <br /> Ethyl tert-butyl ether ND 2.0 <br /> tert-Amyl methyl ether ND 2.0 <br /> Surrogate:DibrontoJluorornethane 98.0% 50-150 " <br /> Surrogate: 1,2-Dichloroethane-d4 98.0% 50-150 " <br /> MW-9(W908271-09)Water Sampled: 11-Aug-99 11:32 Received: 12-Aug-99 14:25 <br /> Ethanol ND 500 uoll 1 9H25009 24-Aug-99 25-Aug-99 EPA 8260A <br /> tert-Butvl alcohol ND 100 <br /> Methvl tert-butyl ether ND 2.0 " <br /> Di-isopropyl ether ND 2.0 <br /> Etliv]tert-butyl ether ND 2.0 <br /> methyl ether ND 2.0 " <br /> Siirrogate:Dihrorrta/lrtorornellrane 98.0% 50-150 <br /> Surrogate: 1,2-Diehloroetlrcnie-dd 96.0% 50-150 <br /> MW-10(W908271-10)Water Sampled: 11-Aug-99 11:05 Received: 12-Aug-99 14:25 <br /> Ethanol ND 500 us/I l 9F125009 24-Au9-99 25-Aug-99 EPA 8260A <br /> tort-Butyl alcohol 550 100 <br /> Methyl tert-butyl ether 1100 100 50 26-Aug-99 " A-01 <br /> Di-isopropyl ether ND 2.0 l ^ " 25-Aug-99 " <br /> Ethyl tert-butyl ether ND 2.0 " <br /> tort-Amyl methyl ether 7.3 2.0 <br /> Surrogate:Dihronrofluorotnethane 102% 50-150 " <br /> Surrogate: 1,2-Dichloroethane-44 98.0% 50-150 <br /> Sequoia Analytical - Walnut Creels Tire rexult,r in this report apply to the s nrples analyzed in accordrmce with the chain of <br /> custody document.This analytical rep art must he reproduced in in entirety. <br /> i <br /> Ju e Feg ey, ProJecrManapgage 4 of 7 <br />