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1 819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> FAX equo9z1s.coo <br /> Analytical <br /> www,squoialab .corn <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548,Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: 548,Stockton,CA Reported: <br /> Cameron Park CA,95682 Project Manager: Steve Carter 03/11/02 13:27 <br /> Total Purgeable Hydrocarbons, BTEX and MTBE in Air (ppffiv) by DHS LUFT <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> INF Total Air(S203052-01)Air Sampled:03/04/02 07:21 Received:03/04/02 10:55 <br /> Purgeable Hydrocarbons 140 146 ppmv 50 2030064 03/05/02 03/05/02 DHS LUFT <br /> Benzene ND 0.80 " <br /> Toluene 1.1 0.65 " <br /> Ethylbenzene 2.7 0.60 " <br /> Xylenes(total) 19 0.60 " <br /> Methyl tent-butyl etber ND 7.0 _ <br /> Surrogate:a,a,a-Trifluorotoluene 103% 60-140 " <br /> INF Cat Air(S203052-02)Air Sampled: 03/04/02 07:18 Received: 03/04/02 10:55 <br /> Purgeable Hydrocarbons 160 28 ppmv 10 2030064 03/05/02 03/05/02 DHS LUFT ^^ <br /> Benzene 0.58 0.15 " <br /> Toluene 030 0.13 <br /> Ethylbenzene 0.26 0.12 " <br /> lenes(total) 3.6 0.12 <br /> ethyl tert-butyl ether ND 1.4 " ^ <br /> Surrogate:a,a,a-Triuorotoluene 119% 60-140 " <br /> EFF Air(5203052-03)Air Sampled:03/04/0207:15 Received:03/04/02 10:55 <br /> Purgeable Hydrodarbons ND 2.8 ppmv 1 2030064 03/05/02 03/05/02 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-Triiuorotoluene 106% 60-140 " <br /> IlWequoia 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 />