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819 Sinker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> FAX(9t6)921-Olio <br /> Analytical <br /> www soquoudabs coni <br /> SECOR International-Rancho Cordova Project Tosco 1205,Lathrop,CA <br /> 3017 Kilgore Road,Suite 100 Protect Number N/A Retorted <br /> Rancho Cordova CA,95670 Proaect Mme' Rusty Benkosky 04/10/02 18 08 <br /> Total Purgeable Hydrocarbons,BTEX and MTBE in Air by DHS LUFT <br /> Sequoia.Analytical- Sacramento <br /> Reportmg <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> Ri -MW-S S203428-01 Air Sam led 03/25/0211 00 Received 03127/0214.30 <br /> Purgeable Hydrocarbons 52000 5000 mg/ml Air 500 2030385 03/28/02 03/28/02 DHS LUFr <br /> Benzene 510 25 10 " 1. " <br /> Toluene 160 25 <br /> Ethylbenzene 740 25 " <br /> Xylenes(total) 3100 25 <br /> Methyl Cert-butyl ether ND 250 " ^ <br /> Surrogate a,a,a-Trrfluorotoluene 950% 60-140 " <br /> INF-MW-6 S203428-02 Air Sam led 03/25/02 15 00 Received 03/27/02 14 30 <br /> Purgeable Hydrocarbons 13000 500 trigW Air 50 2030385 03/28/02 03/28/02 DHS LUFT <br /> Benzene 91 2 5 1. " " " <br /> Toluene 41 25 <br /> Ethylbenzene 150 25 " <br /> Xylenes(total) 490 2 5 <br /> Methyl tert-butyl ether 31 25 <br /> Ourrogate a aa-Trifluorotoluene 113% 60-140 " <br /> INF-MW-1(S203428-03)Air Sampled 03/26/02 10 00 Received 03/27/02 14 30 <br /> Purgeable Hydrocarbons 370 100 mg/ml Air 10 2040016 03/29/02 . .03/29/02 DHS LUFT <br /> Benzene ND 0 50 " " " " " " <br /> Toluene 3 9 0 50 " <br /> Ethylbenzene 61 050 " <br /> Xylenes(total) 42 050 <br /> Methyl tert-butyl ether ND 5 0 ^ " <br /> Surrogate a a,a-Trifluorotoluene 870% 60-140 " <br /> Sequoia 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 he reproduced w its entirety <br /> Page Page 2 of 14 <br />