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t819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916) 921-9600 <br /> FAX(916) 921 0100 <br /> Analytical <br /> yalytical www sequoialabs com <br /> SECOR International-Rancho Cordova Project Arco 4932, Stockton,CA Sampled 8/21/00 to 8/22/00 <br /> 3017 Kilgore Road, Suite 100 Project Number NIA Received 8/24/00 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported 9/11/00 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE by DHS LOFT/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 /> Batch 0080367 Date Prepared 8131100 Extraction Method EPA 50308 McOH <br /> Blank 0080367-BLK 1 <br /> Purgeable Hydrocarbons 8/31/00 ND mg/kg 100 <br /> enzene ND 000500 <br /> oluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> ,Xylenes(total) ND 000500 <br /> ethyl tert-butyl ether _ ND 00500 <br /> Surrogate a a a-Trifluorotoluene 0200 0207 600-140 103 <br /> U,,nLCS0080367-BSl <br /> ene z 8/31/00 0200 0 188 mg/kg 700-130 94 0 <br /> Toluene 0200 0 185 700-130 92 5 <br /> Et benzene 0200 0201 700-130 101 <br /> s(total) " 0 600 0 531 700-130 88 5 <br /> yl tert-butyl ether 0200 0 184 700-130 920 <br /> Surrogate a a a-Triuorotoluene 0200 0209 600-140 105 <br /> atrix Spike 0080367-MSI 5008344-10 <br /> =Benzene 8/31/00 0200 ND 0 123 mg/kg 600-140 615 <br /> Toluene 0200 ND 0 131 600-140 655 <br /> thylbenzene 0200 ND 0 130 600-140 650 <br /> ylenes(total) 0 600 ND 0 356 600-140 59 3 2 <br /> Methyl tert-butyl ether 0200 ND 0 116 600-140 58 0 2 <br /> urrogate a,a a-Trrfluorotoluene 0200 0185 600-140 92 5 <br /> atrrx S wke Dup 0080367-MSD1 S008344-10 <br /> Benzene 8/31/00 0200 ND 0 130 mg/kg 600-140 650 25 0 5 53 <br /> toluene " 0200 ND 0 139 " 600-140 695 250 593 <br /> thylbenzene 0200 ND 0 135 600-140 67 5 250 377 <br /> Xylenes(total) 0 600 ND 0 373 600-140 62 2 25 0 477 <br /> Methyl tert-butyl ether 0200 ND 0 125 600-140 62 5 25 0 747 <br /> Fu rrogale a,a,a-Trtfluorotoluene 0200 0206 600-140 103 <br /> Batch 0090003 Date Prepared 9/1/00 Extraction Method EPA 5030B(MeOH) <br /> lank 0090003-BLK1 <br /> JPB <br /> urgeable Hydrocarbons 9/1/00 ND mg/kg 100 <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> thylbenzene ND 000500 <br /> tEylenes <br /> (total) ND 000500 <br /> M*l tert-butyl ether ND 00500 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and def nitrons <br /> Page 15 of 20 <br />