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Sequoia 404 N. ,CA Lane <br /> Walnut Creek,CA 94598 <br /> ID (925)988-9600 <br /> Analytical FAX(925)988-9673 <br /> 'zr6ttler 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 -Walnut Creep <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-4(W908271-05)Water Sampled: 11-Aug-99 15:27 Received: 12-Aug-99 14:25 <br /> Ethanol ND 500 ug/1 1 9H25009 24-Aug-99 24-Aug-99 EPA 8260A <br /> tent-Butyl alcohol 570 100 " " 11 " " <br /> Methyl tert-butyl ether 580 20 10 25-Aug-99 " <br /> Di-isopropyl ether ND 2.0 t 24-Aug-99 " <br /> Ethyl tort-butyl ether ND 2.0 " <br /> tent-Amyl methyl ether ND 2.0 " <br /> Surrogate:Dihrotnofluoromethane 96.0% 50-150 " <br /> Surrogate: 1,2-Dichloroelhane-d4 96.0% 50-150 " <br /> MW-5(W908271-06)Water Sampled: 11-Aug-99 14:35 Received: l2-Aug-99 14:25 <br /> Ethanol ND 5000 ug/l to 9H25009 24-Aug-99 24-Aug-99 EPA 8260A <br /> tert-Bute_1 alcohol ND 1000 11 " <br /> Methvi tort-butvl ether 60000 2000 1000 26-Aug-99 A-01 <br /> Di-isopropyl ether ND 20 10 24-Aug-99 " <br /> Ethvl tort-butyl ether ND 20 " <br /> t-Amvl methyl ether 310 20 " <br /> r Jrrrrogate:Dibramofhrnronredratre 96.0% 50-15D <br /> Surrogate: 1,2-Dichloroellfane-c14 94.0% 50-150 <br /> MW-6(W908271-07)Water Sampled: 11-Aug-99 I2:05 Received: 12-Aug 99 14:25 <br /> Ethanol ND 500 ag/t 1 91-125009 24-Aug:-99 24-Aug-99 EPA 8260A <br /> tert-Butyl alcohol ND 100 " <br /> Methvi tort-butvl ether 2.6 2.0 " <br /> Di-isopropyl ether ND 2.0 " <br /> Ethyl tert-butyl ether ND 2.0 " <br /> tett-Amvl methvl ether ND 2.0 " <br /> Surrogate:Dihronrofluoronrethane 98.0% 50-150 " <br /> Surrogate: 1,2-Dichloroethane-d4 98.0% 50-150 <br /> Sequoia Analytical - Walnut Creek The results in this report apply to rhe.ecauple.s imcdy.ecl in trcorc&mee whir the chuin of <br /> custodv document.This analytical report nru.st be reproduced in its entirety. <br /> .- i <br /> - I <br /> Ju a Fugley, Protect Mianager I Page: 3 rye 7 <br /> I <br />