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819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> Sequoia (916)921-9600 <br /> Analytical FAX(916)921.0100 <br /> www.sequoialabs.com <br /> I <br /> RS-Sac,Gateway Oaks Project: ARCO 548,Stockton, CA <br /> 2870 Gateway Oaks Dr.,Ste. 300 Project Number. 548,Stockton,CA Reported: <br /> Sacramento CA,95833 Project Manager: Vernon Elarth 07/09/02 16:44 <br /> Total Purgeable Hydrocarbons, 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 /> INF Total Air 5206352-01Air Sampled:06/24/0212.10 Received:06/24/0214:45 <br /> Purgeable Hydrocarbons 43 2.8 ppmv 1 2060347 06/25/02 06/25/02 DHS LUFT 1-TC-12 <br /> Benzene ND 0.016 <br /> Toluene 0.061 0.013 <br /> Ethylbenzene 0.046 0:012 " <br /> Xylenes(total) 0.87 0.012 " <br /> Methyl tent-butyl ether ND 0.14 " <br /> Surrogate:a.a,a-Trifluorotoluene 107% 60-140 " <br /> INF at Air S206352-02 Air Sampled:06/24/02 11:45 Received: 06/24/02 14:45 <br /> Purgeable Hydrocarbons 59 2.8 ppmv 1 2060347 06/25/02 06/25/02 DHS LUFT HC-12 <br /> Benzene ND 0.016 <br /> Toluene 0.074 0.013 " <br /> Ethylbenzene 0.21 0.012 <br /> Xylenes(total) 1.3 0.012 " <br /> ethyl tert-butyl ether ND 0.14 " <br /> Surro.zate:a.a,a-Trifluorotoluene 101% 60-140 <br /> EFF Air(5206352-03)Air Sampled:06/24/02 11:40 Received:06124/0214:45 <br /> Purgeable Hydrocarbons ND 2.8 ppmv 1 2060347 06/25/02 06/25/02 DRS 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 /> Surrozate:a.a,a-Trifluorotoluene 93% 60-140 " <br /> equoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document. This analytical report must he reproduced in its entirety, <br /> Page Page 3 of 6 <br />