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a <br /> ;j 819 Striker Avenue,Sulte 8 <br /> 1 <br /> Sequoia <br /> `p qu o i a 5acran 916 92 95834 <br /> �i <br /> ® l• (91b) 921-4600 <br /> y► r� <br /> FAX(916) 921-0100 <br /> www.sequolatabs.com <br /> ww•sequofalabs.corn <br /> Delta Environmental Consultants(Carneron 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 08/07/01 10:41 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE in Air 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 /> Batcb 1070266-EPA 5030E (P/T) <br /> Blank(1070266-BLKI) Prepared&Analyzed:07/25/01 <br /> Purgeable Hydrocarbons ND 10 mgJm'Air <br /> Benzene 0.0995 0.050 AF-B <br /> Toluene ND 0.050 <br /> Ethylbenzene ND 0.050 <br /> Xylenes(total) 0.0816 0.050 AF-B <br /> Methyl ten-butyl ether ND 0.50 " <br /> Surrogate:a,a,a-Tris luorotoluene - 2.26 - " 2.00 113 60-140 <br /> LCS(1070266-BSI) _ _ Prepared&Analyzed:07/25/01 <br /> Benzene 2.34 0.050 mglm'Air 2.00 117 70-130 <br /> uene 2.17 0.050 '1 2.00 108 70-130 <br /> ylbenzene 2.12 0.050 2.00 106 70-130 <br /> Xylenes(total) 6.52 0.050 6.00 109. 70-130 <br /> Methyl tert-butyl ether 1.88 0,50 2.00 94.0 70-130 <br /> Surrogate:a,a,a-Tris luorotoluene 2.44 2.00 122 60=140 <br /> LCS Dup(1070266-ESDI) Prepared&Analyzed:07/25/01 -_- <br /> Benzene 2.50 0.050 mg/ml Air 2.00 125 70-130 6.61 25 <br /> Toluene 2.31 0.050 2.00 116 70-i30 6.25 25 <br /> Ethylbenzene 2.26 0.050 2.00 113 70-130 6.39 25 <br /> Xylenes(total) 6.90 0.050 6.00 115 70-130 5.66 25 <br /> Methyl tert-butyl ether L92 0.50 2.00 96.0 70-130 2.11 25 <br /> Surrogate:a,a,a-Trifluorotoluene 2.25 2.00 112 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 entirety. <br /> Pale 4 of 6 <br />