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SequoSequoia 819 Striker Avenue,Suite 8 <br /> ia Sacramento, CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> (916)921-0100 <br /> na <br /> . [..�� www.sequolalabs.com <br /> i <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 01/12/01 14:45 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE in Air by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %RP-C RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1010119-EPA 5030B(P/T <br /> Blank(1010119-BLKI) Prepared&Analyzed:01/10/0I <br /> Purgeable Hydrocarbons ND 10.0 mg/ml Air <br /> Benzene ND 0.0500 " <br /> Toluene ND 0.0500 " <br /> Ethylbenzene ND 0.0500 " <br /> Xylenes(total) ND 0.0500 " <br /> Methyl tert-butyl ether ND 0.500 " <br /> Surrogate:a,a,a-Trifiuorotoluene 2.08 2.00 104 60-140 <br /> LCS(1010119-SSI) Prepared&Analyzed:01/10/01 <br /> Benzene 2.02 0.0500 mg/ml Air 2.00 101 70-130 <br /> luene 2.14 0.0500 2.00 107 70-130 <br /> ylbenzene 2.19 0.0500 2.00 110 70-130 <br /> Xylenes(total) 5.75 0.0500 6.00 95.8 70-130 <br /> Methyl tert-butyl ether 1.90 0.500 2.00 95.0 70-130 <br /> Surrogate:a,a,a-Trifluorotoluene 2.28 2.00 114 60-140 <br /> LCS Aup(1010119-BSDD� Prepared&Analyzed: 01/10/01 <br /> Benzene 2.06 0.0500 mg/ml Air 2.00 103 70.130 1.96 25 <br /> Toluene 2.17 0.0500 2.00 109 70-130 1.39 25 <br /> Ethylbenzene 2.20 0.0500' . 2.00 110 70-130 0.456 25 <br /> Xylenes(total) 5.79 0.0500 6.00 96.5 70-130 0.693 25 <br /> Metbyl tert-butyl ether 1.95 0.500 2.00 97.5 70-130 2.60 25 <br /> Surrogate:a,a,a-Tris luorotoluene 2.23 W_ 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. Thts analytical report must be reproduced in its entrrery. <br /> Page 4 of 6 <br />