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Sequoia 404 N .CA lane <br /> • Walnut Creek,CA 94598 <br /> 1 (925)988-9600 <br /> Analytical FAX(925)988-9673 <br /> tiler Ryan,Inc -Dublin Project Unocal <br /> 747 Sierra Court Suite J Project Number Unocal SS#5886 Reported <br /> Dub <br /> hnn CA,94568 Project Manager Deanna L Harding 14-Sep-99 17 49 <br /> Volatile Organic Compounds by EPA Method 8260A <br /> Sequoia Analytical -Walnut Creek <br /> Reportmg <br /> Analyte Result Lunt Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-41)(W908373-05)Water Sampled 17-Aug-9910 26 Received 18-Aug-9914 00 <br /> Ethanol ND 500 ug/1 1 91131005 30-Aug-99 31-Aug-99 EPA 8260A <br /> tert-Butyl alcohol ND 100 " <br /> Methyl tent-butyl ether 48 20 <br /> Dmbopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 2 0 " <br /> tert-Amyl methyl ether ND 20 <br /> Surrogate Dibromofluoromethane 106% 50-150 " <br /> Surrogate 12-Dichloroethane-d4 104% 50-150 <br /> MW4S(W908373-06)Water Sampled 17-Aug-99 10 00 Received 18-Aug-99 14 00 <br /> Ethanol ND 500 uJl 1 91131005 30-Aug-99 31-Auy 99 EPA 8260A <br /> tent-Butyl alcohol ND !00 " <br /> Meth-,l tent-butNI ether 4 8 2 0 " <br /> Di-i�opropNI ether ND 2 0 " <br /> Rip.1 tert-hut%l ether ND 2 0 " <br /> art-Ane%1 inall%I alux ND 2 0 <br /> r opre Dihr ornofhrar ontethane 106% 50-150 ------ - <br /> rotogtrte 1 2-Dichlotoethane-d-4 104 % 50-151) " <br /> MW-51) (W9083734)7)Water Sampled 17-Aub9909 05 Re,.ened 18-Aug-99 14 00 <br /> Eth.inal ND 500 uo/l 1 9H31005 30-,Aug-99 31-Aug-99 EPA 8260A <br /> tent-13utv1.ilLohol ND l O() ' " " " <br /> Metlivl tert-butvl ether ND 2 0 <br /> Di-rsopropvl ether ND 2 0 " <br /> Etln l ttrt-hutN I ether ND 2 0 <br /> tort-Amvi IrLthrl ether ND 2 0 " <br /> .Surrogate Dthtoniofhtoromethane 106% 50-150 " <br /> Suitogate 1 2-Dichloroelharie-<14 104% 50-150 " <br /> Sequoia Analytical-Walnut Creek The revully in div report apply fi the wanple%imedti,edin rrcordince wah the clran„f <br /> cuvtoch+document Thiv anrhncal report roust 6e reprmluced in i ry enoren <br /> u Ise 4g y 'eon e t M.i eS Paye. 7 o1 16 <br />