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819 Striker Avenue Sulte 8 <br /> Sacramento,CA 95834 <br /> 4 a- ) Sequoia (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical. <br /> www sequoialabs corn <br /> Delta Envn onmental Consultants(Cameron Park) Project ARCO 2168, Stockton,CA <br /> 3330 Cameron Park Dr Ste 550 ProjectNumber 2168, Stockton,CA Reported <br /> Cameron Park CA, 95682 Project Manager Steve Carter 12/21/01 09 27 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Rcportirg SpiL-e So.:_= 0 R—vC RPD <br /> Analvte Result Limit Units Level ' Result °/oREC Limits RPD Limit Notes <br /> Batch 1120161 - EPA 5030B(P/T) <br /> Blank(1120161-BLKI) _ Prepared&Analyzed 12/12/01 <br /> Purgeable Hydrocarbons ND ug/l f <br /> Benzene ND 050 <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0)0 <br /> Xylenes(total) —_ - — ----ND - - 050 _-- <br /> Surrogate a a a-Trt/luorololuene 1! 1 /00 )11 60-140 <br /> LCS(1120161-13S1) _ _ - -Prepared&Analyzed 12/12/01 <br /> Benzene 101 050 ug/l 100 101 70-130 <br /> Toluene 923 050 100 923 70-130 <br /> thylbenzene 8 18 050 100 81 8 70-130 <br /> ylenes(total)-- - u 253 - 050 - 300 - _ _ _ 843 — 70-134 <br /> Surrogate a a a-Trifluorotoluene 11 7 700 117 60-140 <br /> Batch 11.20185- EPA 5030B (P/T) <br /> Blank(1120185-BLKI) - _ _ Prepared&Analyzed 12/13/01 <br /> Purgeable Hydrocarbons ND 50 ugh <br /> Benzene ND 0 50 <br /> Toluene ND 050 <br /> Ethylbcnzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Trtuorototuene 104 160 104 60-140 -- _ <br /> LCS(1120185-BS1) _Prepared&Analyzed 12/13/01 <br /> Benzene ^^ u - _-- -_-- 9 80 _--_-0 50 ug/l 100 98 0 70-130 <br /> Toluene 9 57 0 a0 100 95 7 70-130 <br /> Ethylbenzene 946 050 100 94 6 70-130 <br /> Xylenes(total) 28 6 050 300 953 70-130 <br /> Surrogate a a a-rrti luoroioluene J01 10 0 101 60-140 Y <br /> ANINk <br /> equoia Analytical - Sacramento The results in this report apply to the samples analysed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> page 9 of 14 <br />