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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento C 95834 <br /> 4 (916)922 1-9600 <br /> FAX(916192 1-0100 <br /> - - Analytical wwwsequoialabs com <br /> 4 <br /> Gettler-Ryan- Rancho Cordova Project Unocal 0187, Stockton,CA Sampled 11/2/00 <br /> 3164 Gold Camp Dr Ste 240 Protect Number N/A Received 1113/00 <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 /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Blank((continued)_ 0110085-BLK1 <br /> Surrogate a a a-Trifluorotoluene 11/7/00 0200 0204 mg/kg 600-140 102 <br /> LCS 0110085-BSI <br /> Benzene 11/7/00 0200 0 192 mg/kg 700-130 960 <br /> Toluene 0200 0 210 700-130 105 <br /> Ethylbenzene 0200 0 224 700-130 112 <br /> Xylenes(total) 0 600 0 582 700-130 970 <br /> Methyl Cert-butyl ether 0200 0 186 700-130 93 0 <br /> Surrogate a a a-Trifluorotoluene 0200 0 229 600-140 114 <br /> Matrix Spike 0110085-MSI S011095-01 <br /> Benzene 11/7/00 0200 = 0 970 0 928 mg/kg 600-140 -21 1,13 <br /> Toluene 0200 17 8 14 3 600-140 -1750 I,D <br /> 0e/benzene 0200 10 7 838 600-140 -1160 I,D <br /> nes(total) 0 600 47 1 388 60 0440 -1380 I,D <br /> Methyl tert-butyl ether _ 0200 ND ND 600-140 0 1,13 <br /> Surrogate a a a-Trifluorotoluene " 0200 0 332 600-140 166 1 D <br /> Matrix Spike Dup 0110085-MSD1 S011095-01 <br /> Benzene 11/7/00 0200 0 970 0 924 mg/kg 600-140 -23 250 1,13 <br /> Toluene 0200 178 142 600-140 -1800 250 l,D <br /> Ethylbenzene 0200 10 7 8 58 600-140 -1060 25 0 1,D <br /> Xylenes(total) 0 600 47 1 394 600-140 -1280 250 1,D <br /> Methyl tert-butyl ether 0200 ND ND 600-140 0 250 1,13 <br /> Surrogate a a a-Trtfluorotoluene 0200 356 600-140 17800 1 D <br /> 0 <br /> Sequoia Analytical - Sacramento *Refer to end of report for text of notes and definitions <br /> Page 4 of 5 <br />