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Sequoia 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> A <br /> fAX 6}92t-0100 <br /> Analytical <br /> www.seq.sequoEalabs.corn <br /> Delta Environmental Consultants-Cameron Park Project: ARCO 5469, Stockton, CA Sampled: 918100 <br /> 3330 Cameron Park Dr, Project Number: N/A Received: 918100 <br /> Cameron Park,CA 95682 Project Manager: Jay Johnson Reported: 9127100 <br /> Total hlrgealale Hydrocarbons(C6 'C12) a <br /> zBTEX nd MTBE by DHS LUST/Quality Control <br /> Sequoia Analytical <br /> Sacramento <br /> Date Spike Sample QC Reporting Limit Recov, RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> Blank continued 0090178-BLKI <br /> Surrogate: a,a,a-Triuorotoluene 9/IS/00 10.0 7.99 u9/1 60.0-140 79.9 <br /> LCs- 0090178-BSI <br /> Benzene 9/I8/00 10.0 8.40 ug/1 70.0-130 84.0 <br /> Toluene 10.0 8.32 70.0-130 83.2 <br /> Ethylbenzene 10.0 8.60 70.0-130 86.0 <br /> Xylenes(total) 30.0 25.6 70.0-130 85.3 <br /> Methyl tert-butyl ether 10.0 7.92 70.0-130 79.2 <br /> Surrogate: a,a,a-Triluorotcluene 10.0 7.74 60.0-140 77.4 <br /> Matrix Spike 0090178-MSI 5009116-01 <br /> Benzene 9/18/00 10.0 ND 8.77 ug/1 60.0-140 87.7 <br /> Toluene 10.0 ND 8.71 60.0-140 87.1 <br /> Eth Ibenzene 10.0 ND 8.83 60.0-140 88.3 <br /> s(total) 30.0 ND 26.4 60.0-140 88.0 <br /> 1 tert-butyl ether 10.0 4.61 I5.0 60.0-140 104 <br /> Surrogate: a,a,a-Triuorotoluene 10.0 7,71 60.0-140 77.1 <br /> Matrix Spike Duo 0090178-MSD1 5009116-01 <br /> Benzene 9/18/00 10.0 ND 8.96 ug/I 60.0-140 89.6 25.0 2.14 <br /> Toluene 10.0 ND 9.02 60.0-140 90.2 25.0 3.50 <br /> Ethylbenzene 10.0 ND 8.99 60.0-140 899 25.0 1.80 <br /> Xylenes(total) 30.0 ND 27.0 60.0-140 90.0 25.0 2.25 <br /> Methyl tert-butyl ether 10.0 4.61 14.7 60.0-140 101 25.0 2.93 <br /> Surrogate: a,a,a-Trifluorotoluene 10.0 7.34 60.0-140 73.4 <br /> is Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> i� <br /> Page 8 of 12 i <br /> i <br /> __.-- - - J <br />