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�I <br /> •' <br /> Sequoia <br /> � ���aa 819 Striker Avenue,Suite 8 <br /> Sacramento,GA 95834 <br /> (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www.sequaialabs.com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548, Stockton,CA <br /> 3330 Cameron Park Dr.Ste 550 Project Number. NIA Reported: <br /> Cameron Park CA,95682 Project Manager: Jay Johnson 08/20/01 13:07 <br /> Total Purgeable Hydrocarbons, BTEX and MTBE in Air by DHS LUFT <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> INF Total Air(S108068-01)Air Sampled: 08/06/01 06:24 Received: 08/06/0109:58 <br /> Purgeable Hydrocarbons 11 l0 "rnglm',Air l 1080120 08/08/01 08/08/01 DHS LUFT <br /> Berizene ND 0.050 " <br /> Toluene ND 0.050 <br /> Ethylbenzene 0.14 0.050 " <br /> Xylenes(total) 1.7 0.050 " <br /> Methyl tert-butyl ether ND 0.50 <br /> Surrogate:a,a,a-Trii/luorotoluene 97.0% 60-140 " <br /> INF Cat Air(S108068-02)Air- Sampled: 08/0610106:22 Received:08/06/0109:58 <br /> Purgeable Hydrocarbons I8 10 mg/m'Air l 1080120 08/08/01 08/08/01 DHS LUFT <br /> Benzene ND 0.050 <br /> Toluene ND 0.050 " <br /> $ylbenzene 0.22 0.050 <br /> enes(total) 2.6 0.050 <br /> ethyl tert-butyl ether_ ND 0.50 <br /> Surrogate: o,a,a-Trifluorotoluene 114% 60-140 — <br /> EFF Air(S108068-03)Air Sampled: 08/06/01 06:20 Received:0810610109:58 <br /> Purgeable Hydrocarbons ND 10 mg/tn'Air 1 1080120 08/08/01 08/08/01 DHS LUFT <br /> Benzene ND 0.050 " <br /> Toluene ND 0.050 " <br /> Ethylbenzene ND 0-050 <br /> Xylenes(total) ND 0.050 " <br /> Methyl tert-butyl ether ND 0.50 " <br /> Surrogate: a,a,a-Trij7uorotoluene 110% 60-140 " <br /> quoia 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 /> Page 2 of 6 <br />