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819 Striker Avenue,Sulte 8 <br /> y S e qu O t a Sacramento, 95834 <br /> ® (916)9292 1-9600-9600 <br /> FAX(916)921-0100 <br /> Analytical <br /> www.sequoialabs.com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548,Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: NIA Reported: <br /> Cameron Park CA, 95682 Project Manager: Jay Johnson 08/07/01 10:41 <br /> Total Purgeable Hydrocarbons (C&C12), 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(S107290-01)Air Sampled: 07123/0106:48 Received:07123/0109:40 <br /> Purgeable Hydrocarbons 19 10 mg/m'Air 1 1070266 07/25/01 07/25/01 DHS LUFT <br /> Benzene 0.080 0.050 " <br /> Toluene 0.11 0.050 " <br /> Ethylbenzene 0.35 0.050 " <br /> Xylenes(total) 3.3 0.050 " <br /> Methyl tert-butyl ether ND 0.50 <br /> Surrogate: a,a,a-Trif7uorotoluene 113% 60-140 " <br /> INF CAT Air(S107280-02)Air Sampled: 07123/0106.46 Received: 07/23/0109:40 <br /> Purgeable Hydrocarbons 23 10 mg/ml Air 1 1070266 07/25/01 07/25/01 DHS LUFT <br /> Benzene ND 0.050 " <br /> Toluene 0.064 0.050 " <br /> ylbenzene 0.37 0.050 <br /> Wenes <br /> (total) 3.9 0.050 <br /> 'TtTethyl tert-butyl ether ND 0.50 " <br /> Surrogate:a,a,a-Triuorotoluene 118% 60-140 " <br /> EFF Air(S107280-03)Air Sampled: 07/23/0106:44 Received:07/23/0109:40 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air 1 1070266 07/25/01 07/25/01 DHS LUFT <br /> Benzene ND 0.050 " <br /> Toluene ND 0.050 " <br /> Ethylbenzene ND 0.050 " <br /> Xylenes(total) ND 0.050 " <br /> Methyl tert-butyl ether ND 0.50 " <br /> Surrogate:a,a,a-Trifluorotoluene 108% 60-140 <br /> Cluoia Analytical - Sacramento The results to this report apply to the samples analysed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 2 of 6 <br />