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$t9Striker Avenue, $Seqloia Sacramento,CA 95834 <br /> a (916)921-9600 <br /> Analytical www.sequoialabs.com(916)921-0100 <br /> wwsequolalaUs.com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548, Stockton,CA <br /> 3330 Cameron Park Dr. Project Number. N/A Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson <br /> 01/12/01 14:45 <br /> Total Purgeable Hydrocarbons (C6-Cl2), BTEX and MTBE in Air (ppmv) 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 1410119. EPA 50348(PIT) <br /> Blank(1010119-13LK1) Prepared&Analyzed:01/10/01 <br /> Purgeable Hydrocarbons ND 2.$0 ppmv <br /> Benzene ND 0.0160 " <br /> Toluene ND 0.0130 " <br /> Ethylbenzene ND 0.0120 " <br /> Xylenes(total) ND 0,0120 " <br /> Methyl tert-butyl ether ND 0.140 <br /> Surrogate:a,a,a-Trtfluorotoluene 0.00208 - — -----�"'—'-- -- r- <br /> " 0,00200 104 60-140 <br /> quoia Analytical -Sacramento The results in this to the samples analyzedre ort apply lin accordance with the chain of <br /> P <br /> custody document. This analytical report must he reproduced in its entirety. <br /> ,g Page 5 of 6 <br />