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8I Striker AvcSequoia Sacramento,CA 95834 <br /> (916)921 9600 <br /> Z Analytical FAX(916)921-0100 <br /> www sequoialabs corn <br /> ettler-Ryan-Dublin Project Former Unocal 5098,Stockton,CA S308091 <br /> 6747 Sierra Court, Ste 3 Project Number N/A Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 08/20/03 16 56 <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 3080256-EPA 50308 PIT <br /> lank(3080256-BLK1) Prepared&Analyzed 08/19/03 <br /> lsopropyltoluene ND 050 ug/l. <br /> Methylene chlonde ND 1 0 <br /> ethyl tent-butyl ether ND 050 <br /> aphthalene ND 10 " <br /> n-Propylbenzene ND 0 50 " <br /> Styrene ND 0 50 <br /> 1,1,2-Tetrachloroethane ND 050 <br /> ,1,2,2-Tetrachloroethane ND 10 " <br /> Tetrachloroethene AID 0 50 " <br /> oluene ND 050 <br /> ,2,3-Tnchlorobenzene ND 050 " <br /> 1,2,4-Tnchlorobenzene ND 050 " <br /> nchloroethane ND 050 <br /> nchloroethane ND 0 50 " <br /> Tnchloroethme AID 0 50 <br /> trichlorofluoromethane ND 050 <br /> 2,3-Trichloropropane ND 10 <br /> 2,4-Tnmethylbenzene ND 050 <br /> 1,3,5-Tnrnethylbenzene ND 0 50 " <br /> tiny)chloride ND 050 <br /> ylenes(total) ND 050 " <br /> Surrogate Drbromofluoromethane 272 250 109 70-130 <br /> rrogate 1 2-DCA-d4 172 250 109 70-130 <br /> rrogate 7'oluene-d8 238 250 95 70-130 <br /> Surrogate 4-BFB 272 250 109 70 130 <br /> aboratory Control Sample(3080256-BSI) Prepared&Analyzed 08/19/03 <br /> Benzene 257 050 ug/1 25 0 103 70-130 <br /> Chlorobenzene 241 050 250 96 70-130 <br /> t-Dichloroethene 259 050 250 104 70-130 <br /> luene 23 7 050 25 0 95 70-130 <br /> € <br /> chloroethene 21 4 0 50 250 86 70-130 <br /> Surrogate Dihrnrmnflvm--,tb—. 2S S <br /> 25v l07 70130 <br /> tr':g-te <br /> gate 12-DCA-d4 267 250 107 70-130 <br /> Toluene-d8 241 250 96 70-130 <br /> Surrogate 4-BFB 275 250 110 70-130 <br /> is Analytical - Sacramento The results to this report 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 enttr ety <br /> Page 115 of 117 <br />