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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento C 95834 <br /> (916)922 1-9600 <br /> i!DFAX(916)921-0100 <br /> Analytical www <br /> SECOR International- Rancho Cordova Project ARCO 2133,Stockton,CA Sampled 6122/00 <br /> 3017 Kilgore Road, Suite 100 Project Number N/A Received 6/23/00 <br /> Rancho Cordova,CA 95670 project Manager Rusty Benkosky Reported 7/10100 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> "I, e Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Blank(continued) _ 0070062-BLK1 __— <br /> Surrogate a a a-Trifluorotoluene 7/6100 100 886 ug/! 600-140 886 <br /> LCS 0070062-BS 1 <br /> Benzene 7/6/00 too 882 ug/l 700-130 882 <br /> Toluene 100 875 700-130 875 <br /> Ethylbenzene 100 932 700-130 932 <br /> Xylenes(total) 300 257 700-130 857 <br /> Methyl tert-butyl ether 100 927 700-130 927 <br /> Surrogate a a a-Trrfluorotoluene 100 865 600-140 865 <br /> Matrix Spike 0070062-MSI 5006321-05 <br /> Benzene 7/6/00 too ND 842 ug/I 600-140 842 <br /> Toluene 100 ND 9 01 600-140 901 <br /> E nzene too ND 8 87 600-140 88 7 <br /> XWs(total) 300 ND 247 600-140 823 <br /> Methyl cert-butyl ether _ _ 100 ND 746 600-140 746 <br /> Surrogate a,a a-Trefluorotafuene 10 0 853 600-140 853 <br /> Matrix Spike Dug 0070062-MSD1 5006321-05 <br /> Benzene 7/6/00 100 ND 845 ug/l 600-140 845 250 0 356 <br /> Toluene 100 ND 824 600-140 824 250 893 <br /> Ethylbenzene 100 ND 894 600-140 894 250 0 786 <br /> Xylenes(total) 300 ND 248 600-140 827 25 0 0 485 <br /> Mcthyl tert-butyl ether 100 ND 871 600-140 871 25 0 155 <br /> Surrogate a aa-Trifluorotoluene 100 855 600-140 855 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and def nitrons <br /> Page 6 of 7 <br />