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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento c34 <br /> 958 <br /> 4 (916)922 1-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequolatabscom <br /> SECOR International-Rancho Cordova Project ARCO 595, Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 08/20/01 18 00 <br /> Total Purgeable Hydrocarbon, BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1080124-EPA 5030B(MeOH) <br /> Blank(1080124-BLK1) Prepared&Analyzed 08/09/01 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Trrfluorololuene r 116 100 116 60-140 <br /> LCS(108012.4-13S I)_ _ _ Prepared&Analyzed 08/09/01 <br /> Benzene 101 050 ug/l 100 101 70-130 <br /> Toluene 102 050 100 102 70-130 <br /> iftbenzene 102 050 100 102 70-130 <br /> es(total) 290 050 300 967 70-130 <br /> Methyl tent-butyl ether 105 2 5 10 0 105 70-130 <br /> Surrogate a,a a-Trifluormoluene 121 100 121 60-140 <br /> Matrix Spike(108017.4-MSI) T Source S108053-09 Prepared&Analyzed 08/09/01 <br /> Benzene 838 050 ug/l 100 ND 838 60-140 <br /> Toluene 938 050 100 057 881 60-140 <br /> Ethylbenzene 910 050 100 ND 910 60-140 <br /> Xylenes(total) 264 050 " 300 064 859 60-140 <br /> Methyl tert-butyl ether 108 25 100 ND 108 60-140 <br /> Surrogate a,a,a-Triuorolaluene 103 100 103 60-140 <br /> _Matrix Spike Dup(1080124-MSDI) _ Source 5108053-09 Prepared&Analyzed 08/09/01 <br /> Benzene 927 050 ug/l 100 ND 927 60-140 101 25 <br /> Toluene 101 050 100 057 953 60-140 739 25 <br /> Ethylbenzene 981 050 100 ND 981 60-140 751 25 <br /> Xylenes(total) 283 050 300 064 922 60-140 695 25 <br /> Methyl tent-butyl ether 101 25 100 ND 101 60-140 670 25 <br /> Surrogate a,a a-Triuorotoluene 123 100 123 60-140 <br /> uoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Thus analytical report must be reproduced in its entirety <br /> Page 8 of 13 <br />