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819 riStrikerAve Ste <br /> Sequoia 5acrarnentoto CA 958344 <br /> } <br /> (916)921 9600 <br /> Analy ical FAX(916)921-01 <br /> www sequoWa6s <br /> Gettler-Ryan-Dublin Project Former Unocal 5098,Stockton,CA S305190 <br /> 6747 Sierra Court,Ste J Project Number N/A Reported <br /> Dublin CA, 94568 Project Manager Deanna L Harding 05/21/03 17 32 <br /> GasohneWEXIOxygenates by EPA method 8260B <br /> _ Sequoia Analytical - Sacramento <br /> Reporting , <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notec <br /> MW-9(5305190-10)WaterSampled_ 05/0_6103 11 25 Received 051.06103 17 50 - T <br /> Benzene ND 050 ag/1 1 3054214 05/14/03 05/15/03 EPA 8260B , <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 <br /> Methyl ten-butyl ether ND 20 <br /> Sut i agate 12-DCA-d4 )06% 60-140 <br /> Surrogate Toluene-d8 106% 60-140 <br /> Sul i ogare 4-BFB 80% 60-140 <br /> MW-10(S305190-I1)Water Sampled 05/05/03 12 20 Received 05/06/03 17 50 <br /> Benzene -ND ---' 050 ug/] -1-- 3050234 05/14/03 05/15/03- EPA 8260B , <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND - 050 _ <br /> Methyl tert-butyl ether ND 2 0 <br /> Sul rogate 12-DCA-d4 108'% 60-140 <br /> Suiiogale Toluene-d8 102% 60-140 <br /> Gn inanfn d-RF R �i°u vv-1 ry <br /> MW-10A(S305190-12)Water Sampled 05105103.11 50=Recetved 05106/03-17 50 - -------- - -- <br /> Benzene ND 050 ug/I 1 3050220 05/13/03 05/14/03 .EPA 8260B <br /> =Toluene - --- - ---- ND-----0 56 --- ---"- --+ - -- -- - - . - - - - a- <br /> Ethylbenzene ND 0 50 <br /> xylenes(total) - — -- --ND 0 50 + <br /> Methyl ten-butyl ether ND 2 0 <br /> Sur rogate 1 2-DCA-d4 110% 60-140 <br /> —Suri ogaie"Toluene-d8- " "- - 107%- -60-140 <br /> Sur rogate 4-BFB 72 % 60-140 <br /> Sequoia Analytical - Sacramento The i esults in this report apply to the samples analv.-ed in accor dance with the chain of ' <br /> custody document Unless otherwise stated results are i eported on a wet weight basis <br /> This onalvnc al i epor i must be rept oduced in its entu eri <br /> Page 12 of 121 <br />