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Sequoia 819 r Avenue, 8 <br /> Sacramento, <br /> 958mento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921 abs.co 0 <br /> wwtiv.segttolala6s.com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548,Stockton,CA <br /> 3330 Cameron Park Dr. Ste 550 Project Number: ARCO 548,Stockton,CA Reported: <br /> Cameron Park CA, 95682 Project Manager: Jay Johnson 11/12/01 16:37 <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(SII 1047-01)Air Sampled: 11105/0106:30 Received:.11/05101 10:00 <br /> Purgeable Hydrocarbons 230 28 ppmv 10 1110072 11/05/01 11/05/01 DHS LUFr <br /> Benzene 0.22 0.16 <br /> Toluene 0.54 0.13 " <br /> Ethylbenzene 0.44 0.12 ^ " <br /> Xylenes(total) 11 0.12 " <br /> Methyl tert-butyl ether ND _ 1.4 " <br /> Surrogate:a,a,a-Triuorotoluene –� 80.5% —60-140 <br /> INF Cat Air(SI11047-02)Air Sampled: 11105/0106:28 Received: 11/05/01 10:00 <br /> Purgeable Hydrocarbons 240 28 ppmv 10 1110072 11/05/01 T1/05/01 DHSLUFT <br /> Benzene ND 0.16 ^ <br /> Toluene 0.54 0.13 " ^ <br /> Etbylbenzene 0.49 OA2 ^ ^ <br /> enes(total) 12 0.12 " <br /> ethyl tent-butyl ether ND 1.4 <br /> Surrogate:a,a,a-Tris luorotoluene 93.0% 60-140 <br /> EFF Air(SI11047-03)Air Sampled: 11/05/01 06:26 Received: 11/05/01 10:00 <br /> Purgeable Hydrocarbons ND 2.8 ppmv 1 1110072 11/05/01 11/05/01 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-Trlfluoratoluene ___-- ---fTT82.5% —.-60440 <br /> quoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance wilh the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 3 of 6 <br />