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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento C95834 <br /> (916)921-96C*1-9600 <br /> 4 i!D FAX(916)921 0100 <br /> !D Analytical www sequoialabs corn <br /> Gettler-Ryan-Rancho Cordova Project Tosco 6981,Stockton,CA Sampled 4/27/00 <br /> 3164 Gold Camp Dr,Ste 240 Project Number NIA Received 4/28/00 <br /> Rancho Cordova,CA 95670 Project Manager Mike Mitchener Reported 5/12/00 <br /> Total Purgeable Hydrocarbons(C6-Cl2),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> IAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch- 0050075 Date Prepared 5/4/00 Extraction Method EPA 5030B(MeOH) <br /> Blank 0050075-BLKI <br /> Purgeable Hydrocarbons 5/4/00 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 s a-Trifluorotoluene 0200 0 170 600-140 850 <br /> LCS 0050075-BSI <br /> Benzene 5/4/00 0200 0 187 mg/kg 700-130 935 <br /> Toluene 0200 0 197 700-130 985 <br /> Ethylbenzene 0200 0201 700-130 101 <br /> Xy (total) 0 600 0 563 700-130 938 <br /> MOert-butyl ether 0200 0 169 ,I 700-130 845 <br /> Surrogate a a a-Trifluorotoluene 0200 0 172 600-140 860 <br /> i I <br /> Matrix Spike 0050075-MSI 5005008-05 <br /> Benzene 5/4/00 0200 ND 0 162 mg/kg 600-140 810 <br /> Toluene tt0200 ND 0 172 600-140 860 <br /> Ethylbenzene 0200 ND 0 178 600-140 890 <br /> Xylenes(total) 0 600 ND 0 498 600-140 830 <br /> Methyl tert-butyl ether 0200 ND 0 147 600-140 735 <br /> Surrogate aaa-Triuorotoluene 0200 0 176 600-140 88 0 <br /> Matrix Spike DuR 0050075-MSDI S005008-05 <br /> Benzene 5/4/00 0200 ND 0 163 mg/kg 600-140 815 25 0 0 615 <br /> Toluene 0200 ND 0 172 600-140 860 250 0 <br /> Ethylbenzene 0200 ND 0 179 600-140 895 250 0 560 <br /> Xylenes(total) 0 600 ND 0 502 600-140 837 250 0 840 <br /> Methyl tert-butyl ether 0200 ND 0 143 600-140 715 250 2 76 <br /> Surrogate a a a-Trifluorotoluene 0200 0 177 600-140 885 <br /> Sequoia Analytical-Sacramento *Refer to end ofrePortfor teat ofnates and definitions <br /> p Page 6 of 8 <br />