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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento C 95834 <br /> (916)922 1-96009600 <br /> ID <br /> FAX(916)921-0 100 <br /> rF <br /> Analytical www sequoiaiabs com <br /> SECOR International-Rancho Cordova Project ARCO 595,Stockton,CA Sampled 611/00 to 6/6/00 <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Received 618/00 <br /> Rancho Cordova,CA 95670 Pro ect Manager Rusty Berikosky Reported 6/19100 <br /> Total Purgeable Hydrocarbons(C6-C12),BTPX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> lAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Blank(continuedl 0060127-BLK1 —� <br /> Surrogate a,a,a-Trifluorotoluene 6113100 0200 0 188 mg/kg 600-140 940 <br /> LCS 0060127-BSI <br /> Benzene 6/13/00 0200 0 184 mg/kg 700-130 920 <br /> Toluene it0200 0 190 700-130 950 <br /> Ethylbenzene 0200 0 189 700-130 945 <br /> Xylenes(total) 0 600 0 536 700-130 893 <br /> Methyl ten-butyl ether 0200 0 165 700-130 825 <br /> Surrogate a,a,a-Trifluorotoluene 0200 0 198 „ 600-140 990 <br /> Matrix Spike 0060127-MS1 5006120-54 <br /> Benzene 6/13/00 0200 ND 0 162 mg/kg 600-140 810 <br /> Toluene 0200 ND 0 168 600-140 840 <br /> E nzene 0200 ND 0 170 600-140 850 <br /> XWs(total) 0 600 ND 0 484 600-140 807 <br /> Methyl tert-butyl ether 0200 ND 0 146 600-140 73 0 <br /> Surrogate a,a,a-Triuorotoluene 0200 0195 600-140 975 <br /> Matrix Spike Dup 0060127-MSD1 S006120-54 <br /> Benzene 6/13/00 0200 ND 0 161 mg/kg 600-140 805 25 0 0 619 <br /> Toluene 0200 ND 0 167 600-140 835 25 0 0 597 <br /> Ethylbenzene 0200 ND 0 169 600-140 845 25 0 0 590 <br /> Xylenes(total) 0 600 ND 0 483 600-140 805 250 0 248 <br /> Methyl tert-butyl ether 0200 ND 0 145 600-140 72 5 250 0 687 <br /> Surrogate a,a,a-Trifluorotoluene 0200 0 197 F, 600-140 985 <br /> Batch 0060131 Date Prepared 6113/00 Extraction Method EPA 5030B(MeOH) <br /> Blank 0060131-BLKI <br /> Purgeable Hydrocarbons 6113100 ND mg/kg 100 <br /> Benzene ND „ 000500 <br /> Toluene ND It 000500 <br /> F-thylbenzene ND 000500 <br /> Xylenes(total) ND 000500 <br /> Methyl tert-butyl ether ND 00500 ` <br /> Surrogate a a a-Trtfluorotoluene 0200 0 233 600-140 116 <br /> LCS 0060131-BSI <br /> Benzene 6113/00 0200 0 212 mg/kg 700-130 106 <br /> Toluene 0200 0 213 700-130 106 <br /> Ethylbenzene 0200 0203 700-130 101 <br /> s(total) 0 600 0 562 70 0430 937 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 21 of 27 <br />