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819 Striker Avenue, Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> D- Analytical <br /> FAX (916)921-0100 <br /> EMCON/Pinnacle-Cameron Park Project: ARCO 2186,Stockton Sampled: 8/23/99 to 8/26/99 <br /> 3939 Cambridge Road,Ste.220 Project Number: NIA Received: 8127199 <br /> Cameron Park,CA 95682 Project Manager: Mark Capps Reported: 9/13/99 <br /> Total t%rgeable Hydroca'rb'ons(C6-02),BTEX and 1VMTBE by DHS jUVT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov. Limits % Limit % Notes* <br /> $match: 9080245 Fxtracti on 1 P1 <br /> Blank 2080245-BL,K1 <br /> Purgeable Hydrocarbons 8131/99 ND ugll 50.0 <br /> BND 0.500 <br /> Benzene <br /> Toluene ND 4.500 <br /> Ethylbenzene ND 0.500 <br /> Xylenes(total) ND 0.500 <br /> Methyl tent-butyl ether " ' ND 5'00 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 8.61 60.0-140 86.1 <br /> US 908024S-BSI <br /> Benzene 8131199 10.0 8.63 ug/l 70.0-130 86.3 <br /> Toluene 10.0 8.72 70.0-130 87.2 <br /> Ethylbenzene 10.0 8.81 70.0-130 88.1 <br /> Xenes(total) 30.0 26.5 70.0-130 88.3 <br /> !tert-butyl ether 10.0 7.$0 70.0-130 78.0 <br /> !gate: a,a,a-Trifluorololuene <br /> 10.0 8.89 60.0-140 88.9 <br /> Matrix _Spike 9080245-MSI 5908358-15 <br /> Benzene 8131/99 10.0 ND 8.40 ug/l 60.0-140 84.0 <br /> Toluene 10.0 ND 8.81 60.0-140 88.1 <br /> Ethylbenzene 10.0 ND 8.79 60.0-140 87.9 <br /> Xylenes(total) 30.0 ND 26.3 60.0-140 87.7 <br /> Methyl tert-butyl ether10.0 ND 9.28 60.0-140 92.8 <br /> Surrogate: a,a,a-Trifluorotoluene <br /> 10.0 8.28 60.0-140 82.8 <br /> Matr!x Spike Dup - S908358-L5 <br /> Benzene 8131199 10.0 ND 8..53 ug/l 60.0-140. 85.3 25.0 1.54 <br /> Toluene " <br /> 10.0 ND 8.94 60.0-140 89.4 25.0 1.46 <br /> Ethylbenzene 10.0 ND 8.95 60.0-140 . 89.5 25.0 1.80 <br /> Xylenes(total) 30.0 ND 26.7 60.0-140 89.0 25.0 1.47 <br /> Methyl tert-butyl ether 10.0 ND 11.2 60.0-140 112 25.0 18.7 <br /> Surrogate: a,a,a-Trifluorololuene 10.0 8.27 60.0-140 82.7 <br /> Batch: 9080248 Date Prepared- 8130/99 <br /> Blank 908025$_19 Kl <br /> Purgeable Hydrocarbons 8/30199 ND mg/kg 00 <br /> „ ND 0.005500 <br /> Benzene <br /> Toluene " ;VD 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xylenes(total) ND 0.00500 <br /> Methyl tert-butyl ether ND 0.0500 <br /> oia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 12 of 18 <br />