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819 Striker Avenue Suite 8 <br /> l Sequoia Sacramento C95834 <br /> (916)922 1-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs com <br /> Gettler-Ryan-Rancho Cordova Project Unocal 0187 Stockton CA Sampled 11/8/00 <br /> 3164 Cold Camp Dr Ste 240 Project Number N/A Received 11/9/00 <br /> Rancho Cordova CA 95670 Project Manager David Herzog Reported 11/14/00 <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 /> lAnalvte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0110190 Date Prepared 11/13/00 Extraction Method EPA 5030B(MeOH) <br /> Blank 0110190-BLK1 <br /> Purgeable Hydrocarbons 11/13/00 ND mg/kg 100 <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> Ethvlbenzene ND 000500 <br /> Xylenes(total) ND 000500 <br /> Methyl tert-butyl ether _ ND 00500 <br /> Surrogate a a a-Trrfluorotoluene 0200 0 198 600-140 99 0 <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 /> d [benzene 0200 0 223 700-130 112 <br /> nes(total) 0 600 0 581 700-130 968 <br /> Methyl Cert-butyl ether 0200 0 185 700-130 925 <br /> Surrogate a a a-Trifluorotoluene 0200 0 227 600-140 113 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 4 of 6 <br />