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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 9600 <br /> (916)921 9600 <br /> 1 4 1 FAX(916)9Z1 0100 <br /> - Analytical www sequoialabs com <br /> f <br /> Gettler-Ryan- Rancho Cordova Project Unocal 0187, Stockton,CA Sampled 10/31/00 <br /> 3164 Gold Camp Dr Ste 240 Project Number NIA Received 1111/00 <br /> Rancho Cordova CA 95670 Project Manager David Herzog Reported 11/13/00 <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 /> Analvte Analyzed - Level Result Result -- Units Recov limits % Limit % Nates* <br /> Batch 0110069 Date Prepared 1116100 Extraction Method EPA 5030E(MeOH) <br /> Blank 0110069-BLK1 <br /> Purgeable Hydrocarbons 11/6/00 ND mg/kg too <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Xylenes(total) ND 000500 <br /> Methyl tert-butyl ether ND 00500 <br /> Surrogate a a a-Tnfluorotoluene 0200 0 238 600-140 119 <br /> LCS 0110069-BS 1 <br /> Benzene 11/6/00 0200 0 198 mg/kg 700-130 990 <br /> Toluene 0200 _ 0 215 700-130 108 <br /> Ethylbenzene 0200 0 225 700-130 112 <br /> Xylenes(total} - - - - - 0600-- - 0 583 700-130 972 <br /> Methyl tert-butyl ether 0200 _ 0 198 700-130 990 <br /> Surrogate a s a-Tnfluorotoluene 0200 0 228 600-140 114 <br /> Matrix Spike 0110069-MSI __ S011015-03 <br /> Benzene _ _ 11/8/00 0 200 ND _ 0 162 —mg_/kg _ 60 0-140 81-0 - <br /> Toluene _0 20_0 _ND 0 181 600-140 905 <br /> Ethylbenzene _ 0200 ND 0 195 600-140 975 <br /> Xylenes(total) 0 600 ND 0 508 600-140 847 <br /> Methyl tert-butyl ether 0200 �ND 0 156 600-140 78 0 _ <br /> Surrogate a a a-Trifluorotoluene 0 200 0 224 600-140 112 <br /> Matrix Spike Dup 0110069-MSD1 5011015-03 <br /> Benzene 11/8/00 0200 ND 0 168 mg/kg 600-140 840 25 0 3 64 <br /> Toluene 0200 ND 0 185 600-140 925 250 2 19 <br /> Ethylbenzene 0200 ND 0201 600-140 101 250 3 53 <br /> Xylenes(total) 0 600 ND 0 518 600-140 863 25 0 1 87 <br /> Methyl tert-butyl ether 0200 ND 0 163 600-140 81 5 250 439 <br /> Surrogate a a a-Tnfluorotoluene 0200 0 225 600-140 112 <br /> 0 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 3 of 4 <br />