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S e qu o 1 a 819 Striker Avenue,Suite <br /> la) Sacramento CA 958344 <br /> (916)921-9600 <br /> AA FAX(916)921-0100 <br /> nalytical www sequolalabs com <br /> s <br /> Delta Environmental Consultants(Cameron Park) Project. Arco 6100,Tracy, CA <br /> 3330 Cameron Park Dr Ste 550 Project Number 6100,Tracy,CA Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 02/20/02 16 47 <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 lints Level Result %REC Limits RPD Limn Notes <br /> Batch 2020149-EPA 5030E (MeOH) <br /> Blank(202Q149-BLK1) Prepared&Analyzed 02/13/02 <br /> Purgeable Hydrocarbons ND 50 mg/kg <br /> Benzene ND 0 050 " <br /> Toluene ND 0 050 " <br /> Ethylbenzene ND 0 050 " <br /> Xylenes(total) ND 0 050 " <br /> Surrogate a a a-Trifluorotoluene 0893 100 893 60-140 <br /> LCS(2020149-BSI) Prepared&Analyzed 02/13/02 <br /> Benzene 0 736 0 050 mg/kg 100 736 70-130 <br /> Toluene 0 896 0 050 1 00 896 70-130 <br /> W <br /> ylbcnzene 1 05 0 050 1 00 105 70-130 <br /> ones(total) 2099 0 050 -300 99 7 70-130 <br /> Surrogate a a a-Trti luorotoluene 0 825 1 00 825 60-140 <br /> LCS Dup(2020149-BSDI) Prepared&Analyzed 02/13/02 <br /> Benzene 0 848 0 050 mg/kg 1 00 848 70-130 141 25 <br /> Toluene 103 0 050 100 103 70-130 139 25 <br /> Ethylbenzene 120 0 050 100 120 70-130 133 25 <br /> Xylenes(total) 343 0 050 300 114 70-130 137 25 <br /> Surrogate a a a-Trifluorotoluene 0 900 100 900 60-140 <br /> AdMk <br /> quota 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 entirety <br /> Page 4 of 6 <br />