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Sequoia 819 Stnker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916)921-9C,00i%ff Analytical <br /> FAX(916)921-010p <br /> SECOR International Project Arco 4932,Stockton,CA Sampled 6/9/99 <br /> 9912 Business Park Drive,Ste 100 Project Number N/A Received 6/10/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 6125199 <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, 9060265 Date Prepared, 6/17/99 Extraction Method. EPA 5030E(MeOH) <br /> Mailk 9060265-BLK1 <br /> Purgeable Hydrocarbons 6/17/99 ND mg/kg 100 <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Xylenes(total) ND 000500 <br /> Methyl tent-butyl ether ND 00500 <br /> Surrogate a a a-Trifluorotoluene 0100 0183 600-140 915 <br /> CS 2060265-JIS1 <br /> Benzene 6/17/99 0200 0206 mg/kg 700-130 103 <br /> Toluene 0200 0 221 700-130 110 <br /> Ethylbenzene 0200 0 222 700-130 11] <br /> Xylenes(total) 0 600 0 593 700-130 98 8 <br /> Methyl tert-butyl ether 0200 0 193 700-130 96 5 <br /> Sandra R Hanson 0100 0190 600-140 950 <br /> Client Services Representative Laboratory Director <br /> Matrix Spike 9060265-MS1 52Q6142-M <br /> Benzene 6/17/99 0200 ND 0 198 mg/kg 600-140 990 <br /> Toluene 0200 ND 0 210 600-140 105 <br /> Ethylbenzene 0200 ND 0209 600-140 105 <br /> Xylenes(total) 0 600 ND 0 565 600-140 94 2 <br /> Methyl tert-butyl ether 0200 ND 0 213 600-140 106 <br /> Surrogate a a a-Trifluorotoluene 0100 0 191 600-140 960 <br /> Matrix Spike Duo 9060265-MSD1 5906149-03 <br /> Benzene 6117/99 0200 ND 0 190 mg/kg 600-140 950 25 0 4 12 <br /> Toluene 0200 ND 0 193 600-140 965 25 0 844 <br /> Ethylbenzene 0200 ND 0202 600-140 101 25 0 388 <br /> Xylenes(total) 0 600 ND 0 546 600-140 910 250 346 <br /> Methyl tert-butyl ether 0200 ND 0205 600-140 102 25 0 3 85 <br /> Surrogate a a a-Trifluorotoluene 0200 0 189 600-140 945 <br /> Sequoia Analytical-Sacramento s <br /> 9 Y *Refer to end oJreport for text of and definition <br /> Page 7 of 11 <br />