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Sequoia 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> 00 <br /> FAX(916)92t-0 00 <br /> Analytical www.sequoialabs.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 3ohnson 03/16/01 10:48 <br /> Total Purgeable Hydrocarbons (C6-C12), 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 /> Eff(S103108-0I)Air Sampled: 03/07/01 11:30 Received:03/07/01 13:05 <br /> Purgeable Hydrocarbons ND 2.40 ppmv 1 1030094 03/07/01 03/07/01 DHS LUFT <br /> Benzene ND 0.0160 <br /> Toluene ND 0.0130 <br /> Ethylbenzene ND 0.0120 <br /> Xylenes(total) ND 0.0120 <br /> Methyl tert-butyl ether ND 0.140 " <br /> Surrogate:a,a,a-Tri.Jluorotoluene 860% 60-140 <br /> 1nf(5103108-02)Air Sampled. 03/07/0111:45 Received:03/0710113-05 <br /> Purgeable Hydrocarbons 434 120 ppmv 50 1030094 03/07/01 03/07/01 DHS LUFT P-02 <br /> Benzene ND 0.800 <br /> Toluene 4.40 0.650 ^ <br /> )Ethylbenzene 14.8 0.600 <br /> a lenes(total) 85.5 0.600 <br /> yl tert-butyl ether ND 7.00 " <br /> �dFrogate:a,a,a-Triuorotoluene 960% 60-140 " <br /> TInf(5103108-03)Air Sampled: 03/07/01 11:40 Received:03/07/01 13:05 <br /> Purgeable Hydrocarbons 339 140 ppmv 50 1030114 03/08/01 03/08/bl DHS LUFT P-02 <br /> Benzene ND 0.800 <br /> Toluene 3.20 0.650 " <br /> Etbylbenzene 11.0 0.600 <br /> Xylenes(total) 64.5 0.600 " <br /> Methyl tert-butyl ether ND 7.00 <br /> Surrogate:a,a,a-Trifluorotoluene 89.0% 60-140 " ^ � <br /> �uoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance tivith the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 3 of 7 <br />