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814 Sinker Ave Ste 8 <br /> Sequoia Sacramento,CA 45834, <br /> (D (916)921 9600 <br /> Analytical FAX(916)921-0100 <br /> v^vw sequoialabs tom <br /> Gettler-Ryan-Dublin Project Unocal 5098, Stockton, CA S210010 <br /> 6747 Sierra Court, Ste 3 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 2100088-EPA 5030B JP/Tl <br /> Blank(2100088-BLKI) Prepared 10/05/02 Analyzed 10/06/02 - <br /> Tnchlorofluoromethane ND 050 ug/l <br /> 1,2,3-Tnchloropropane ND 10 " <br /> 1,2,4-Tnmethylbenzene ND 0 50 " <br /> 1,3,5-Tnmethylbenzene ND 050 <br /> Vinyl chloride ND 050 " <br /> Tot4l Xylenes 0 800 050 " <br /> Surrogate Dtbromo luoromethane 2.50 250 100 70-130 <br /> Surrogate 12-DCA-d4 273 2.50 109 70-130 <br /> Surrogate Toluene_-d8 266 250 106 70-130 _ <br /> Surrogate 4-BFB 16 7 250 i 107 70-130 <br /> Laboratory Control Sample(2100088-BSI) Prepared 10/05/02 Analyzed 10/06/02 <br /> Benzene 242 0 SO ugA 25 0 97 70-130 <br /> Chlorobenzene 198 0 50 25 0 79 70-130 <br /> 1,1-Dichloroethenc 24 4 050 25 0 98 70-130 <br /> L oluene 214 0 SV 250 86 70-130 <br /> Tnchloroethene_ 21 1__0 50 25 0 <br /> 84 70-130 -- -- -_ -_ -_ <br /> —Surrogate Dtbromo uoromethane- - _22 5-_'_=---- " - - --- <br /> - g � 25 0 ------- =90---=70=130 - -- <br /> Surrogate 1 2-DCR44 226 25 0 90 70-130 <br /> - Surrogate Toluene-d8 - ---208- 15 0 83 T 70-130 T <br /> Surrogate 4-BFB 165 250 66 70-130 .4-01 <br /> Matrix Spike_(2100088-MSI) _ Source S210010-12 _ Prepared 10/05/02 Analyzed 10/06/02 <br /> Benzene <br /> Y- ^ <br /> 300 0 50 ug/I 25 0 078 117 60-140 <br /> Chlorobenzene 263 3 0 50 25 0 ND 105 60-140 -- <br /> I,1-Dichloroethene 291 0 50 250 ND 116 60-140 <br /> Toluene 28 5 0 50 25 0 ND 113 60-140 <br /> Trichloroethene 230 0 50 25 0 ND 92 60-140 <br /> Surrogate Dibromofluoromethane 270 25 0 108 70-130 <br /> Surrogate 1 2-DCA-0 - - 284 - 25 0 114 70-130 <br /> Surrogate Toluene-d8_ __ - _ _ - __29 0 _ _ _ _ _ _r -250 __ _116 - -70-130 - <br /> Surrogate 4-BFB 29 7 250 119 70-130 <br /> Sequoia Analytical - Sacramento The results in 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 bases <br /> This analytical report must be reproduced in its entirety <br /> Page 11 1 of 119 <br />