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619 Sinker Ave Ste 8 <br /> 4D <br /> Sequoia Sacramento CA 95634 <br /> Analytical (916)921-9500 <br /> PAx(916)szl.oloa <br /> www sequoialabs cvm <br /> Gettler-Ryan-Dublin Project Unocal 5098,Stockton,CA S210010 <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 2100083 -EPA 5030BJP/Tl <br /> Blank(2100083-BLK1) Prepared&Analyzed 10/04/02 <br /> Styrene ND 050 ugtl <br /> 1,1,1,2-Tetrachloroethane ND 0 50 <br /> 1,I,2,2-Tetrachloroethane ND 1 0 " <br /> Tetrachloroethene ND 050 <br /> Toluene ND 050 " <br /> 1,2,3-Tnchlorobenzene ND 050 " <br /> 1,2,4-Tnchlorobenzene ND 050 <br /> 1,1,1-Trichloroethane ND 050 " <br /> 1,1,2-Tnchloroethane ND 050 " <br /> Tnchloroethene ND 050 <br /> Tnchlorofluoromethane ND 050 " <br /> 12,3-Tnchloropropane ND 10 " <br /> 1 2,4-Triniethylbenzene ND 0 50 <br /> 1,3,5-Tnmethylbenzene ND 050 <br /> Vinyl chloride ND 0 50 " <br /> Total Xylenes ND 0 50 " <br /> .Surrogate DibiomoJluoromethane 15 4 _ 250 102-70-130-----__ ----- -- <br /> g _ <br /> Surrogate 12-DCA-d4 285 15 0 114 70-130 <br /> Surrogate Toluene-d8_ — _-_ __ _-17 0 —__ _ ___-- - --25 0------ ----108-70-130 - —--- - - ---I <br /> - Swrogate 4-BFB 268 250 107 70-130 <br /> Laboratory Control Sample(2100083-BSI) Prepared&Analyzed 10/04/_02 - <br /> Benzene_ 25_7 0 50 ug/l 25 0 103 70-130 <br /> Chlorobenzene 249 050 25 0 100 70-130 <br /> IJ-Dichloroethene 26 5 0 50 25 0 106 70-130 <br /> Toluene - - 25 9 050 25 0 - 104 70-130 <br /> Trichloroethene 216 0 50 25 0 86 70-130 <br /> Surrogate Dibromofluoromethane 25 5 250 102 70-130 <br /> Surrogate 12-DC4-d4 284 25 0 114 70-130 <br /> Surrogate 7'oluene-d8 281 250 112 70-130 <br /> Surrogate 4-BFB - - 278-- - 25 0 - 111 70-130 <br /> Sequoia Analytical - Sacramento The results in this repot!apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stared results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 105 of 119 <br />