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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916) 921-9600 <br /> FAX(916) 92l <br /> Analytical www sequoialabs <br /> com com <br /> 1Upgradient-Valley Springs Project Valley Motors S211671 <br /> 336 <br /> Augusta Court Project Number N/A Reported <br /> Valley Springs CA,95252 Project Manager Vic Cherven 12/18/02 17 37 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - 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 2120096-EPA 5030B (P/T) <br /> Blank.(2120096_BLKI) --- _— _— —_---Prepared&Analyzed 11/27/02---_ --- -_-- — - <br /> Purgeable Hydrocarbons ND 50 ug/i <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Lthylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a a a-Trti luorotoluene 942 �— --v— 1190 — 94 60-140 - <br /> Blank(2120096-BLK2) Prepared&Analyz_ed 12/02/02 <br /> Putgeable Hydrocarbons ND 50 ug/l —� <br /> Benzene ND 0 50 " <br /> roluene ND 0 50 " <br /> benzene ND 0 50 " <br /> es(total) ND 0 50 <br /> Surrogate a a a-lnJluorotoluene -- 9 05 100 90 60-140 <br /> Laboratory Control Sample(2120096-BSI) Prepared&Analyzed 11/27/02 <br /> Benzene 906 050 ug/l 100 91 70-130 <br /> Toluene 928 050 100 93 70-130 <br /> Lthylbenzene 9 41 050 100 94 70-130 <br /> Xylenes(total) 28 6 0 50 30 0 95 70-130 <br /> Surrogate a a a-Tri luorotoluene 10 7 Y — 100 107 60-140 <br /> Laboratory Control Sample Dnp(2120096-BSD1) Prepared&Analyzed 11/27/02 <br /> Benzene _ _ -__— 932 0 50 ug/l 100 93 70-130 3 — 25 <br /> Toluene 9 28 050 100 93 70-130 0 25 <br /> Ethylbenzene 940 - 050 100 94 70-130 0 1 25 <br /> Xylenes(total) 290 0 50 300 97 70-130 1 25 <br /> Surrogate a a a-Tri luototoluene — — 102 100 102 60-140 <br /> uoia Analytical- Sacramento The results to this report apply to the samples analyzed to accordanceti ah the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4 of 5 <br />