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Sequoia 819 Striker Avenue, 4 <br /> Sacramento,CA 958 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX 921-0100 <br /> 1❑� i.0. www.sequoequoia[abs.com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548, Stockton,CA <br /> 3330 Cameron Park Dr. Project Number: NIA Reported: <br /> Cameron Park CA, 95682 Project Manager, Jay Johnson 01/25/01 16:15 <br /> Total Purgeable Hydrocarbons (C&02), BTEX and MTBE in Air by DHS LUFT <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> Inf Total Air(S101328-01)Air Sampled: 01/23/0107:51 Received: 01/23/0109:57 <br /> Purgeable Hydrocarbons 261 10.0 mg/m'Air 1 1010253 01/24/01 01/24/01 DHS LUFT P-04 <br /> Benzene ND 0.0500 " <br /> Toluene 4.01 0.0500 <br /> Ethylbenzene 4.55 0.0500 <br /> Xylenes (total) 24.8 0.0500 <br /> Methyl tert-butyl ether ND 0.500 " <br /> Surrogate:a,a,a-Trtfluorotoluene 110% 60-140 <br /> Inf Cat Air(5101328-02)Air Sampled: 01/23/0107:41 Received: 01123/0109:57 <br /> Purgeable Hydrocarbons 301 10.0 mg/m3 Air 1 1010253 01/24/01 01/24/01 DHS LUFT P-04 <br /> Benzene 0.0520 0.0500 <br /> Toluene 4.65 0.0500 " <br /> Ethylbenzene 5.13 0.0500 " <br /> lenes(total) 27.3 0.0500 " <br /> ethyl tert-butyl ether ND___ 0.500 <br /> Surrogate:a,a,a-Trifluorotoluene 111 % 60-140 <br /> Eff Air(5101328-03)Air Sampled: 01/23/01 07:37 Received:01/23/0109:57 <br /> Purgeable Hydrocarbons ND 10.0 mg/m'Air l 1010253 01/24/01 01/24/01 DHS LUFT <br /> Benzene ND 0.0500 <br /> Toluene ND 0.0500 <br /> Ethylbenzene ND 0.0500 <br /> Xylenes(total) 0.0900 0.0500 <br /> Methyl tert-butyl ether ND _ 0.500 <br /> Surrogate: a,a,a-Trifluorotoluene 80.0% 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 /> Pale 2 of 6 <br />