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;I <br /> 819 Striker Avenue,Suite 8 <br /> ® Sequoia Sacramento, 95834 <br /> 92 <br /> (916)92 i-9600 <br /> Analytical <br /> FAX(916)921-0100 <br /> Aialyt{-ical www.sequoialabs.com <br /> i <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 08/07/01 10:41 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE in Air (ppmv) by DHS LUFT <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Resuh Limit Units Dilution Batch Prepared Anal}Wd Method Notes <br /> INF Total Air(S107280-01)Air Sampled: 0712310106:48 Received: 07/2310109:40 <br /> Purgeable Hydrocarbons 4.7 2.8 ppmv 1 1070266 07/25/01 07/25/01 DHS LUFT <br /> Benzene 0.025 0.016 " <br /> Toluene 0.029 0.013 " <br /> Ethylbenzene 0.080 0.012 <br /> Xylenes(total) 0.76 0,012 " <br /> Methyl tent-butyl ether ND 0.14 <br /> Surrogate: a,a,a-Trifiuorotoluene 113% 60-140 " <br /> INF CAT Air(5107180-02)Air Sampled:07/23/0106.46 Received:07/23/0109:40 <br /> Purgeable Hydrocarbons 5.7 2.8 ppmv 1 1070266 07/25/01 07/25/01 DHS LUFT <br /> Benzene ND 0.016 " <br /> Toluene 0.020 0.013 " <br /> Ethylbenzene 0.084 0.012 " <br /> lenes(total) 0.89 0.012 <br /> _ethyl tert-butyl ether ND 0.14 <br /> Surrogate: a,a,a-Trifluorotoluene 118% 60-140 Io " <br /> EFF Air(5107280-03)Air Sampled:07/23/0106:44 Received: 07/23/0109:40 <br /> Purgeable Hydrocarbons ND 2.8 ppmv 1 1070266 07/2510) 07/25/01 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 tent-butyl ether ND 0.14 " <br /> Surrogate:a,a,a-TriJluorotoluene 108% 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 /> Page 3 of 6 <br />