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819 Ssnker Ave Ste 8 <br /> Sequoia - Sacramento,CA 95834 <br /> ,�D (916)921 9600 1 <br /> Analytical FAX(916)92 1-0 100 <br /> www sequoialabs com - <br /> Gettler-Ryan -Dublin Project Unocal 5098,Stockton, CA 5210010 <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 /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2100085- EPA 5030B JP/TJ <br /> Matrix Spike(2100085-MSI) Source S210010-07 - Prepared&Analyzed 10/05/02 <br /> Surrogate Dibromofluoromerhane 264 ug/l 230 106 70-1301 <br /> Surrogate 1 2-DCA-d4 290 250 116 70-730 <br /> Sur rogate Toluene-d8 275 250 110 70-130 <br /> Surrogate 4-BFB 27 7 250 IH 70-130 <br /> Matrix Spike Dup (2100085-MSDI) - Source S210010-07 Prepared&Analyzed 10/05/02 <br /> Benzene - 804 050 ug/1 _ 250 58 90 60-140 '_._..._.5 25 ' <br /> Chlorobenzene 250 050 25 0 ND 100 60-140 3 25 <br /> 1,1-Dichloroethene 263 050 25 0 ND 105 60-140 8 25 <br /> Toluene 306 050 250 - 50 102 -60-140 3 25 <br /> Trichloroethene 21 6 050 250 ND 86 60-140 5 25 <br /> Surrogate Dibromofluoromethane 256 250 102 70-130 <br /> Surrogate 12-DCA-d4 282 250 113 70-130 <br /> Surrogate Toluene d8 275 250 110 70-130 <br /> Surrogate 4-BFB 265 250 106 70-130 <br /> Batch 2100088-EPA 5030BIP/Tl <br /> y050 .---' — -' — <br /> --BEa—Blank(21000$8-BLKl)-- - - - -- - - - - - 'Prepared'10/05102=Analyzed-14106102 <br /> Benzene ND <br /> ug/l <br /> Bromobenzene T ND T - - 0 50 <br /> Bromochloromethane ND 0 50 <br /> Bromodichloromethane ND 0 50 <br /> `-`Bi-omofiii-m .._._��_��.._-w�....t__ _ _ -..... _._.-.N�� .'•._�50 " <br /> Bromomethane ND 10 <br /> -n-Butylbenzene _ ND 050 <br /> sec-Butylbenzene ND 050 " <br /> tert-Butylbenzene ND 0 50 " <br /> Carbon tetrachloride ND 0 50 <br /> Chlorobenzene ND 0 50 " <br /> Chloroethane ND 0 50 11 <br /> Chloroform ND 0 50 " <br /> Chloromethane ND 050 <br /> 2-Chlorotoluene ND 050 <br /> Sequoia Analytical - Sacramento The results in this report apply to the samples analyzed to accordance with the chain 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 109 of 119 <br />