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Sequoia $19 Striker Avenue Suite 8 <br /> Sacramento GA 95834 <br /> 4 (916)921-9600 <br /> FAX(916)921-0100 <br /> -!D— Analytical www sequolalabs com <br /> i <br /> Gettler-Ryan-Rancho Cordova Project Tosco 6981,Stockton,CA Sampled 4/27100 <br /> 3164 Gold Camp Dr,Ste 240 Project Number N/A Received 4/27/00 <br /> Rancho Cordova,CA 95670 Project Manager Mike Mitchener Reported 4/28/00 <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 /> Batch 0040288 Date Prepared 4/27100 Extraction Method EPA 5030B(MeOH) <br /> Blank 0040288-BLKI <br /> Purgeable Hydrocarbons 4/27/00 ND mg/kg 100 <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-Trifluorotoluene 0200 0163 600-140 815 <br /> LCS 0040288-BSI <br /> Benzene 4/27100 0200 0 193 mg/kg 700-130 965 <br /> Toluene 0200 0 196 700-130 980 <br /> Ethylbenzene 0200 0 196 „ 700-130 980 <br /> X�(total) " 0 600 0 566 700-130 943 <br /> M tert-butyl ether 0200 0202 700-130 101 <br /> Surrogate a a a-Trifluorotoluene 0200 0 170 600-140 850 <br /> Matrix Spike 0040288-MS1 5004310-02 <br /> Benzene 4/27/00 0200 ND 0 167 mg/kg 600-140 83 5 <br /> Toluene 0200 ND 0 176 600-140 880 <br /> Ethylbenzene 0200 ND 0 181 600-140 905 <br /> Xylenes(total) 0 600 ND 0 513 600-140 85 5 <br /> Methyl tert-butyl ether 0200 ND 0 145 600-140 72 5 <br /> Surrogate a a a-Trifluorotoluene 0200 0163 600-140 815 <br /> Matrix Syike Duo 0040288-MSD1 S004310-02 <br /> Benzene 4/27/00 0200 ND 0 169 mg/kg 600-140 845 250 119 <br /> Toluene 0200 ND 0 179 600-140 89 5 250 169 <br /> Ethylbenzene 0200 ND 0 184 600-140 920 250 164 <br /> Xylenes(total) 0 600 ND 0 519 600-140 865 250 116 <br /> Methyl tert-butyl ether 0200 ND 0 134 600-140 670 250 789 <br /> Surrogate a a a-Tnfluorotoluene 0200 0 166 600-140 83 0 <br /> i <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> ,per <br /> Page 4 of 6 <br /> `erg <br />