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Sequoia 819 Striker Avenue,Suite 8 <br /> eia <br /> Sacramento,CA 45834 <br /> (916)921-9600 <br /> Analytical <br /> FAX equo 9abs.co 0 <br /> • wwwsequoialahs.com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548,Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: ARCO 548,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 11/12/01 16:37 <br /> Total Purgeable Hydrocarbons, 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 /> Batch 1110072-EPA 5030B(P/T) <br /> Blank(1110072-BLK1) _ Prepared&Analyzed. 11/05/01 <br /> Purgeable Hydrocarbons AID 10 mg/m'Air <br /> Benzene ND 0.050 " <br /> Toluene ND 0.050 " <br /> Ethylbertzene IIID 0.050 " <br /> Xylenes(total) IIID 0.050 " <br /> Methyl tert-butyl ether ND 0.50 " <br /> Surrogate:a,a,a-Trifluorotoluene 1.90 �' 2.00 . 95.0 60-140 <br /> LCS(1110072-BS 1) --_ Prepared&Analyzed: 11/05/01 <br /> Benzene 1.99 0.050 mg/m'Air 2.00 99.5 70-130 <br /> 4ene 2.03 0.050 „ 2.00 102 70-130 <br /> ]benzene 2.03 0.050 2.00 102 70-130 <br /> Xylenes(total) 5.57 0.050 6.00 92,8 70-130 <br /> Methyl tert-butyl ether 2.29 0.50 2.00 114 70-130 <br /> Surrogate:a,a,a-Triuorotoluene ---2.02 2.00 101 60-140 ---�-�-� <br /> LCS Dup(1110072-BSD]) Prepared&Analyzed: 11/05/01 <br /> Benzene 1.93 0.050 mg/m'Air 2.00 96.5 70-130 3.06 25 <br /> Toluene 1.98 '0.050 2.00 99.0 70-130 2.49 25 <br /> Ethylhenzene 2.02 0.050 2.00 101 70-130 0.494 25 <br /> Xylenes(total) 5.49 0.050 6.00 91.5 70-130 1.45 25 <br /> Methyl tert-butyl ether 2.09 0.50 2.00 104 70-130 9.13 25 <br /> Surrogate:a,a,a-Triuorotoluene 1.94 2.00 97.0 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. This analytical report must be reproduced in its entirety. <br /> Page 4 of 6 <br />