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' �� �®�aa 819 Striker Avenue,Suite 8 <br /> 1 Sacramento,CA 95834 <br /> ® ;916)921-9600 <br /> IWO Analytical wFAX{916}921-0100 <br /> 1.. wwsequotalabs.corn <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548,Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: NIA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 08/20/01 13:07 <br /> Total Purgeable Hydrocarbons, 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 1080120-EPA 5030B (PIT) <br /> Blank(1080120-BLKI) _ Prepared: 08/07/01 Analyzed:08/08/01 <br /> Purgeable Hydrocarbons — ND 2.8 ppmv <br /> Benzene ND 0.016 " <br /> Toluene ND 0.013 " <br /> Ethylbenzene ND 0.012 " <br /> Xylenes(total) ND 0.012 " <br /> Methyl cert-butyl ether ND 0.14 " <br /> Surrogate.a,a,a-Triuorotoluene 0.00219 0.00200 110 60-140 <br /> LCS(1080120-BSI) Prepared: 08/07/01 Analyzed:08/08/01 <br /> Surrogate:a,a,a-Tr#7uorotoluene 0.00241 ppmv 0.00200 120 60-140 <br /> S Dup(1080120-BSD1) Prepared:08/07/01 Analyzed:08/08/01 <br /> Surrogate:a,a,a-Trifluorotoluene 0.00215 ppmv 0.00200 108 60-140 <br /> quoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. Phis analytical report must be reproduced in its entirety. <br /> Page 5 of 6 <br />