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• 819 Straker Ave Ste <br /> 4D— Sequoia Sacramento,CA 95834 <br /> (916)921_9600 <br /> mW Analytical FAX(916)921-o100 <br /> Www sequotalabs coin <br /> Gettler-Ryan-Dublin Project Unocal 5098, Stockton,CA S210010 <br /> 6747 Sierra Court,Ste J Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 10/14/02 18 46 <br /> GasolineWEXIOxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-22S(S210010-27RE1) Water Sampled 09/22/02 18 00 Received 09/26/02 18 35 _�- <br /> Xylenes(total) ND 050 ug/l l 2100083 10/04/02 10/05/02 EPA 8260B <br /> Surrogate Toluene-d8 112% 60-140 t, <br /> Surrogate 4-BFB 109% 60-140 <br /> Surrogate 1,2-DCA-d4 116% 60-140 <br /> MW-22D (S210010-28)Water Sampled 09/22/02 18 25 Received 09/26/02 l8 35 <br /> Teri-butyl alcohol ND 50 ug/l 1 2100083 10/04/02 10/04/02 -EPA 8260B <br /> Methyl tert-butyl ether ND 050 <br /> Dt-'isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 <br /> Tert-amyl methyl ether ND 0 50 <br /> 1,2-Dichloroethane 063 050 " <br /> 1,2-Dtbromoethane(EDB) ND - 050 - <br /> Benzene 20 050 <br /> Ethyibenzene ND 050 <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Toluene-d8 -_ 118% 60-140 <br /> Surrogate 4-BFB 109% 60-140 <br /> .iurfugutc 1,2-LVA-d4 114 in 60-140 <br /> V <br /> BMW-23S (5210010-29)Water=Sampled 09123/02=11 12=Received 09/26/02-1835 <br /> Tert-butyl alcohol ND 50 ug/l 1 2140085 10/05/02 10/05/02 EPA 8260E <br /> —�—� <br /> —Methyl tett-butyl ether — _— - -- -ND---- - 0 - <br /> Di-isopropyl ether ND 0 54 <br /> Ethyl tert-butyl ether ND T 050 <br /> Tert-amyl methyl ether ND 0 50 <br /> 1,2-Dichloroethane ND 050 " <br /> —1,2=Dtbromoethane(EDB)- _ _ _ ___� ND— - -'0 50 <br /> Benzene _ ND 0 50 <br /> Ethylbenzene ND 0 54 " <br /> Toluene 089 050 <br /> Xylenes(total) 074 0 50 <br /> Surrogate Toluene-d8 112% 60-140 <br /> Surrogate 4-BFB 114% 60-140 <br /> Surrogate 1,2-DCA-d4 114% 60-140 <br /> - <br /> Sequoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain o <br /> custody document Unless otherwise stated,results are reported on a wet weighs basis <br /> This analytical report must be reproduced in its entirety <br /> Page 23 of 119 ' <br />