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819 Striker Avenue,Suite 8 <br /> S e qu o i a Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)9o0 <br /> FAX <br /> i <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 5469,Stockton,CA <br /> 33 30 Cameron Park Dr. Ste 550 Project Number: N/A Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 10/01/01 15:20 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LLTFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %AEC RPA <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1090168- EPA 5030B (P/T) <br /> Blank(1090768-BLKI) - _ _ Prepared&Analyzed: 09/17/01 <br /> Purgeabie Hydrocarbons ND 50 ugll <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) NO 0.50 " <br /> Surrogate:a,a,a-Triuorotoluene 12.0 10.0 120 60-140 <br /> LCS (1090768-7351)_ Prepared&Analyzed:09/17/01 <br /> Benzene 10.5 0.50 ugli 10.0 105 70-130 <br /> Toluene 9.69 0.50 10.0 96.9 70-130 <br /> Ethylbenzene 9.02 0.50 10.0 90.2 70-130 <br /> enes(total) 25.8 0.50 30.0 86.0 70-130 <br /> ogare:a,a,a-Tris uorotoluene W 11.7 100 117 60-140 <br /> LCS Dup(1090168-BSD1) -_--- Prepared&Analyzed:09/17/01 _ <br /> Benzene 9.99 0.50 ugll 10.0 99.9 70-130 4.98 25 <br /> Toluene 9.11 0.50 " 10.0 91.1 70-I30 6.17 25 <br /> Ethylbenzene 8.27 0.50 10.0 82.7 70-130 8.68 25 <br /> Xylenes(total) _ _ 24.0 0.50 30.0 80.0 70-130 7.23 25 <br /> Surrogate:a,aa-Tri fluorololuene 11.2 10.0 111 60-140 <br /> �uoia 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 /> I <br /> i Page 12 of 13 <br />