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Sequoia <br /> ` 7 819 Striker Avenue,Suite 8 <br /> V e quo 1 a Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical) wFAX(916)921s.c oo <br /> • ww.sequofalabs.com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548, Stockton,CA <br /> 3330 Cameron Park Dr..Ste 550 Project Number: 548,Stockton,CA - Reported: <br /> Cameron Park CA,95682 Project Manager: Steve Carter 01/18/02 10:19 <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(S201117-01)Air Sampled:01/08/0206:07 Received:01/08/02 08:10 <br /> Purgeable Hydrocarbons 880 50 mg/rn'Air 5 2010193 01/11/02 01/11/02 DHS LUFT HC-12 <br /> Benzene ND 0.25 <br /> Toluene 2.3 0.25 " <br /> Ethylbenzene 2.7 0.25 <br /> Xylenes(total) 30 0.25 " <br /> Methyl tert-butyl ether NSD 2.5 <br /> Surrogate:a,a,a-Triuorotoluene 76,0016 60-140 <br /> INF CAT Air(S201117-02)Air Sampled: 01/08/02 06:04 Received: 01/08/0208:10 <br /> Purgeable Hydrocarbons 1200 100 mg/m'Air 10 2010193 01/11/02 01/11/02 DHS LUPI' FIC-12 <br /> Benzene 0.60 0.50 <br /> Toluene 2.4 0.50 <br /> hylbenzene ', 4.0 0.50 . <br /> lenes(total) 43 0.50 <br /> ethyl tert-butyl ether ND 5.0 <br /> Surrogate:a,a,a-TriJ7uor0toluene 875% 60-140 " T- <br /> EFF Air(5201117-03)Air Sampled: 01/08/0206:01 Received:01/08/02 08:10 <br /> Purgeable Hydrocarbons ND 10 mg/m'Air 1 2010193 01/11/02 01111/02 DHS LUFT <br /> Benzene ND 0.050 <br /> Toluene ND 0.050 " <br /> Ethylbenzene ND 0.050 " <br /> Xylenes(total) ND 0.050 <br /> Metbyl tert-butyl ether 0.73 0.50 <br /> Surrogate:a,a,a-Trij7uorotoluene 82.0% 60-140mWc " <br /> quota Analytical- Sacramento The results in this report apply io the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> r9, Page 2 of 6 <br />