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819 Striker Avenue,Suite 8 <br /> S e-q o i a. Sacramento, CA 95$34 <br /> (916)921-9600 <br /> FAX(916)921-0100 <br /> .Analytical www,sequolalabs.com <br /> �• J <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548, Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: N/A Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 10/08/01 14:14 <br /> Total Purgeable Hydrocarbons, BTEX and MTBE in Air (ppmv) by DHS LUFT <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> INF Total Air(5110003-01)Air Sampled: 10/01/0106:00 Received: 10/01/0109:10 <br /> Purgeable Hydrocarbons 170 28 ppmv 10 1100064 10/03/01 10/03/01 D148 LUFT <br /> Benzene ND 0.16 " <br /> Toluene ND 0.13 " <br /> Ethylbenzene 1.0 0.12 " <br /> Xylenes(total) 14 0.12 <br /> Methyl tert-butyl ether _— ND 1.4 <br /> Surrogate:a,a,a-Triuorotoluene 73.5% 60-140 " <br /> INF Cat Air(S110003-02)Air Sampled: 10/01/01 05:58 Received: 10/01/0109:10 <br /> Purgeable Hydrocarbons 190 28 ppmv 10 1100064 10/03/01 10/03/01 DHS LUFT <br /> Benzene ND 0.16 " <br /> Toluene ND 0.13 " <br /> Ethylbenzene 1.1 0.12 " <br /> nes(total) 15 0.12 " <br /> yl tert-butyl ether ND 1.4 " <br /> Surrogate:a,a,a-Trifluorotoluene 104% 60-140 " <br /> EFF Air(S110003-03)Air Sampled: 10/01/01 05:56 Received. 10/01/0109:10 <br /> Purgeabie Hydrocarbons ND 2.8 ppmv 1 1100064 10/03/01 10/03/01 DHS LUFT <br /> Benzene ND 0.016 " <br /> Toluene ND 0.013 ^ <br /> Ethylbenzene ND 0.012 " <br /> Xylenes(total) ND 0.012 <br /> Methyl tert-butyl ether ND 0.14 ^ <br /> Surrogate:a,a,a-Trifluorotoluene 58.0% 60-140 _ " " 11 S-04 <br /> uoia 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.3 of 6 <br />