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819 SinkerAve Ste 8 <br /> 4D— Sequoia Sacramento CA 95834 <br /> 14W (916)921 gkAnalytical FAX(916)921-p144 <br /> www sequwalabs com <br /> Gettler-Ryan-Dublin Prosect 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 /> JSequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2100066-EPA 5030B JP/TJ <br /> Laboratory Control Sample(2100066-BSI) Prepared&Analyzed 10/03/02 <br /> Surrogate Toluene-d8 287 119/1 250 115 70-130 <br /> Surrogate 4-BFB 279 250 111 70-130 <br /> Matrix Spike(2100066-MSI) Source S210010-06 Prepared&Analyzed 10/03/02 <br /> Benzene 31 1 0 50 ugA 25 0 7 7 94 60-140 <br /> Ch{orobenzene 25 0 0 50 25 0 ND 100 60-140 <br /> 1,I-Dichloroethene 25 6 0 50 25 0 ND 102 60-140 <br /> Toluene 29 6 0 50 25 0 5 8 95 60-140 <br /> Tnchioroethene 21 3 050 250 ND 85 60-140 <br /> Surrogate Dtbromofluoramethane 248 250 99 70-130 <br /> Surrogate 1 2-DCA-d4 268 15 0 L 107 70-130 <br /> Suirogate Toluene-d8 276 250 110 70-130 <br /> Surrogate 4-BFB 274 15 0 110 70-130 <br /> 1%4atrix SDike DUD (2100066-MSD11 Source 52101110-06 PrennrPrl k AnalvzPA 10tn31fr7 <br /> Benzene 29 5 0 50 ug/l 25 0 7 7 J 87 60-140 5 __25 <br /> —Chlorobenzene T24 8 —0 50 25 0 ND 99 60-140 0 8 25 l <br /> 1 I-Dichloroethene 23 2 0 50 " 250 ND 93_ 60-140_ 10— <br /> Toluene 298 0 50 25 0 5 8 96 60-140 0 7 25 <br /> Trichloroethene _ _ 20 8_m — 0 50_ __ 25 0 ND_ —83- a-60-140 - 2 25- - -- <br /> Surrogate Dibromafluoromethane 241 2.50 96 70-130 <br /> —Surrogate 1 2-DCA-d4 __ _ e _ 25 6__ _, 250-- -- --- I01w---70-130 -____- _ - -_ <br /> - Suirogate Toluene-d8 279 250 - 112 70-130 <br /> Surrogate 4-BFB 277 25 0 111 70-130 <br /> Batch 2100083-EPA 5030B (P/T] <br /> Blank(2100083-BLKI) Prepared&Analyzed 10/04/02 <br /> Benzene ND 050 ugA <br /> Bromobenzene ND 0 50 " <br /> Bromochloromethane ND 050 " <br /> Bromodichloromethane -0 <br /> Bromoform ND 0 50 <br /> Sequoia Analytical - Sacramento The results in this repoi t apply to the samples analyzed in 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 103 of 119 <br />