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1t 8195tAvenue,SuiteSeciuLa Sacramento, <br /> 919600 <br /> Analytical wFAX(916)921-0100 <br /> wwsequoialabs.corn <br /> 1333:0 <br /> Environmental Cons ultants(Cameron Park) Project: ARCO 548,Stockton,CA <br /> ameron Park Dr. ProjectNumber: N/A Reported: <br /> on Park CA,95682 Project Manager: Jay Johnson 02/16/01 13:50 <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 Dllnti0n Bateb Prepared Analyzed Method Notes <br /> Inf Total Air(5102012-01)Air Sampled: 02/06/01 07:00 Received: 02/06/01 09:30 <br /> Purgeable Hydrocarbons 522 120 pprnv 50 1020132 02/07/01 02/07/01 DHS LUFT P-04 <br /> Benzene ND 0.800 <br /> Toluene 12.1 0.650 " <br /> Ethylbenzene 13.8 0.600 <br /> Xylenes(total) 63.3 0.600 <br /> Methyl tert-butyl ether ND 7.00 " <br /> Surrogate:a,a,a-Trlfluorololuene 106% 60-140 <br /> Inf Cat Air(5102072-02)Air Sampled: 02/06/01 06:57 Received: 02/06/01 09:30 <br /> Purgeable Hydrocarbons 631 120 ppmv 50 1020132 02/07/01 02/07/01 DHS LUFT P-04 <br /> Benzene ND 0.800 <br /> Toluene 14.1 0.650 " <br /> Ethylbenzene 15.8 0.600 <br /> Xylenes(total) 73.4 0.600 <br /> ethyl tert-butyl ether ND 7.00 " <br /> rogale:a,a,a-Trifluorotoluene 106% 60-140 <br /> Eff Air(5102072-03)Air Sampled: 02/06/0106:54 Received:02/06/01 09:30 <br /> Purgeable Hydrocarbons ND 2.40 ppmv 1 1020132 02/07/01 02/07/01 DHS LUFT <br /> Benzene ND 0.0360 " <br /> Toluene ND 0.0130 <br /> Ethylbenzene ND 0.0120 " <br /> Xylenes(total) 0.0172 0.0120 <br /> Methyl Cert-butyl ether ND 0.140 <br /> Surrogate:a,a,a-Trifluorotoluene 102% 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 be reproduced in its entirety. <br /> 3of6 <br />