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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento C 95834 <br /> (91 G)922 I-9G00 <br /> FAX(916) I-0100 <br /> Analytical www sequoialalabs corn <br /> Gettler-Ryan-Rancho Cordova Project Unocal 0187 Stockton,CA Sampled 1113100 to 11/6/00 <br /> 3164 Gold Camp Dr, Ste 240 Project Number N/A Received 1117100 <br /> Rancho Cordova CA 95670 Project Manager David Herzog Reported 11/16/00 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFTIQuality 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 /> Blank continued 0110190-BLK1 <br /> Surrogate a a a-Trifluorotoluene 11/13/00 0200 0 198 mg/kg 600-140 990 <br /> LCS 0110190-BSI <br /> Benzene 11/13/00 0200 0 192 mg/kg 700-130 960 <br /> Toluene 0200 0208 700-130 104 <br /> EthyibenzenL 0200 0 223 700-130 112 <br /> Xylenes(total) 0 600 0 581 700-130 968 <br /> Methyl tert-butyl ether 0200 0 185 700-130 925 <br /> Surrogate a a a-Trrfluorotoluene 0200 0 227 600-140 113 <br /> Matrix Spike 0110190-MSI SOII119-27 <br /> Benzene 11/13/00 0200 ND 0 t75 mg/kg 600-140 875 <br /> Toluene 0200 ND 0 192 600-140 96 0 <br /> W11/benzene 0200 ND 0207 600-140 103 <br /> nes(total) 0 600 ND 0 528 600-140 88 0 <br /> Methyl tert-butyl ether __ 0200 ND 0 162 600-140 810 __ <br /> Surrogate a s a-Trrfluorotoluene 0200 0 227 600-140 113 <br /> Matrix Spike Dun 0110190-MSD1 S011119-27 <br /> Benzene 11/13/00 0200 ND 0 180 mg/kg 600-140 900 250 282 <br /> Toluene 0200 ND 0 193 600-140 965 25 0 0 519 <br /> Ethylbenzene 0200 ND 0208 600-140 104 25 0 0 966 <br /> Xylenes(total) 0 600 ND 0 524 600-140 873 25 0 0 799 <br /> Methyl tert-butyl ether 0200 ND 0 128 600-140 640 25 0 23 4 <br /> Surrogate a s a-Trrfluorotoluene 0200 0 221 600-140 110 <br /> Batch 0110205 Date Prepared 11/14/00 Extraction Method EPA 5030E(MeOH) <br /> Blank 0110205-BLK1 <br /> Purgeable Hydrocarbons 11/14/00 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-Trruorotoluene 0200 0 225 IF600-140 112 <br /> LCS 0110205-BSI <br /> Benzene 11/14/00 0200 0 186 mg/kg 700-130 93 0 <br /> Toluene 0200 0207 700-130 103 <br /> Ethylbenzene 0200 0 222 700-130 111 <br /> 0enes(total) 0 600 0 576 700-130 960 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 12 of 15 <br />