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r <br /> Sequoia <br /> 819 Stnker Ave Ste 8 <br /> Se l101a Sacramento CA 95834 <br /> `� (916)421-9600 <br /> Analytical FAX(9 -0 1()() <br /> vhE" www sequoialauoiala6s com <br /> V <br /> Gettler-Ryan -Dublin Project Former Unocal 5098,Stockton,CA S308091 ' <br /> 6747 Sierra Court, Ste J Project Number NIA Reported <br /> Dublin CA,94568 - - - - _.-.Project Manager Deanna L Harding , 08/20/03 1656 <br /> - Gasoline\BTEXIOxygenates by EPA method 8260B - Quality Control - <br /> " ' Sequoia Analytical= Sacramento <br /> - Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limns RPD Limit Notes <br /> Batch 3080206- EPA 5030E [PIT] <br /> s ' <br /> Blank(3080206-13LK1) Prepared&Analyzed 08/14/03 <br /> Benzene ND 050 ug/l <br /> Toluene ND 050 <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tent-butyl ether ND 2 0 " <br /> " Surrogate 1 2-DCA-d4 294 25 0 r 118 60-140 } - <br /> Sur?ogate Toluene-d8 200 - 25 0 80 60-140 1 <br /> Surrogate 4-BFB 230 250 92 60 140 <br /> Blank(3080206-BLK2) - i r q Prepared&Analyzed 08/15/03 _ <br /> Benzene ND 050 ug/1 <br /> -Toluene ` ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Methvl tett-butyl ether ND 2 0 " <br /> ,<n .+ 2.5 n me Fn_tcn <br /> Sutruguie i 2-DCA-u4 iv v On - <br /> _ Surrogate Toluene-d8 172 1125 0 69 60-140 <br /> Surrogate 4-BFB 21 7 1125 0 Y 87 60-140 - --—--- <br /> --Blank(3080206-BL-K3) —- - - _— - - - __- --=Prepared&Analyzed 08/18/03 ; T-- — �--- <br /> Benzene ND 0 50 ug/l <br /> Toluene _ - - --- --- --ND-- - -0 50-- <br /> Ethylbenzene <br /> 0 Ethylbenzene ND 050 - <br /> Xylenes(total) ND 050 " <br /> —Methyl tert-butyl ether.•. -w-----....1.,.-- ----ND—, ­-20 <br /> Surrogate 12-DCA-d4 195 1125 0 78 60-140 ' <br /> Surrogate Toluene-d8 18 7 25 0 75 60-140 <br /> Surrogate 4-BFB 212 250 85 60-140 <br /> Sequoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chairs of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 98 of 117 <br />