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819 Stnker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (9l 6)921-9600 <br /> FA-X(916)921-0100 <br /> Analytical www sequoialabs com <br /> 1w <br /> SECOR International-Rancho Cordova Project ARCO 2133,Stockton,CA Sampled 9/13/00 to 9/14/00 <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Received 9/14/00 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported 9/28/00 <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 /> IAnalyte Analyzed Level Result result Units Recov Limits % Limit % Notes* <br /> Blank(continued) _ 0090247-BLKI <br /> Surrogate a a a-Trifluorotoluene 9/26/00 100 114 ug/1 600-140 114 <br /> LCS 0090247-BSI <br /> Benzene 9/26/00 too 10 1 ug/l 700-130 101 <br /> Toluene 100 101 700-130 101 <br /> Ethyibenzene 100 102 700-130 102 <br /> Xylenes(total) 300 304 700-130 101 <br /> Methyl tert-butyl ether_ _ 100 _ _11 1 700-130 ill _ _ ____ __ <br /> Surrogate a,a a-Trifluorotoluene 100 103 600-140 103 <br /> Matrix Spike 0090247-MSI S009211-11 <br /> Benzene 9/26/00 100 ND 10 5 ug/1 600-140 105 <br /> T 100 ND 106 600-140 106 <br /> Et enzene 100 ND 107 600-140 107 <br /> Xylenes(total) 300 ND 320 600-140 107 <br /> Methyl tert-butyl ether 100 ND 851 600-140 851 <br /> Surrogate a a a-Trifluorotoluene 100 104 600-140 104 <br /> Matrix Spike Dup 0090247-MSD/ 5009211-11 <br /> Benzene 9/26/00 100 ND 107 ug/l 600-140 107 25 0 189 <br /> Toluene 100 ND 10 7 600-140 107 25 0 0 939 <br /> Ethylbenzene 100 ND 107 600-140 107 250 0 <br /> Xylenes(total) 300 ND 322 600-140 107 250 0 <br /> Methyl tert-butyl ether _ " 100 ND 114 " 600-140 114 250 290 <br /> Surrogate a a,a-Trrfluorotoluene 100 106 600-140 106 <br /> Batch- 0090248 Date Prepared 9126/00 Extraction Method EPA 5030B(MeOH) <br /> Blank 0090248-BLKI <br /> Purgeable Hydrocarbons 9/26/00 ND ug/1 Soo <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether ND 250 <br /> Surrogate a a a-Trifluorotoluene f� 100 103 60 0-140 103 <br /> LCS 0090248-13S 1 <br /> Benzene 9/26/00 too 917 ug/i 700-130 91 7 <br /> Toluene 10 0 9 92 700-130 992 <br /> �enzene 100 9 51 700-130 95 1 <br /> s(total) 300 274 700-130 91 3 <br /> Sequoia Analytical-Sacramento *Refer to end of report for test of notes and definitions <br /> Page 8 of 10 <br />