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819 Striker Avenue Suite 8 <br /> 1 Sequoia Sacramento CA 95834 <br /> ® (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs com <br /> Delta Environmental Consultants(Cameron Park) Project ARCO 2168, Stockton,CA <br /> 3330 Cameron Park Dr Ste 550 Project Number 2168, Stockton,CA Reported <br /> Cameron Park CA 95682 Protect Manager Steve Carter 121/21/0109 27 <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 1120208-EPA 5030B (P/T) <br /> Matrix Spike(1120208-MSI) _ Source 5112083-10 Prepared&Analyzed 12/13/01 <br /> Benzene 837 050 ug/I 100 ND 83 7 60-140 <br /> Toluene 895 050 too ND 89 5 60-140 <br /> Ethylbenzene 894 050 100 ND 894 60-140 <br /> Xylenes(total) 252 050 300 ND 840 60-140 <br /> Surrogate a a a-Trifluorotoluene 884 100 884 60-140 <br /> Matrixpjke Dup(1120208--MSDI) Source 5_112083-10 Prepared 12/13/01 Analyzed 12/14/01 <br /> Benzene 8 80 050 ug/l too ND 880 60-140 501 25 <br /> Toluene 920 050 100 ND 920 60-140 275 25 <br /> Ethylbenzene 931 050 too ND 93 1 60-140 405 25 <br /> Xylenes(total) 259 050 300 ND 863 60-140 274 25 <br /> rrogate a a a-Trifluorotoluene 938 _ 100 _ 958 60-140 <br /> Batch 1120226- EPA 5030B (PIT) <br /> Blank(1120226-BLKI) _ _ Prepared&Analyzed 12/17/01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a a a-Tr fluorotoluene 963 100 963 60-140 <br /> LCS(1120_226-BSI) _ _ _ Prepared&Analyzed 12/17/01 <br /> Benzene_ T 961 0 50 ug/l 100 961 70-130 <br /> Toluene 930 0 50 too 930 70-130 <br /> Ethylbenzene 9 37 0 50 100 93 7 70-130 <br /> Xylenes(total) 28 1 0 50 300 937 70-130 <br /> Surrogate a a a-Tr fluorotoluene 9 88 160 .988 60-140 <br /> equoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entzrery <br /> Page 11 of 14 <br />