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1 Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> (916) 921-9600 <br /> Analytical FAX(916)921-0100 <br /> SECOR International Project Arco 4932,Stockton,CA Sampled 6/2/99 <br /> 9912 Business Park Drive,Ste 100 Project Number N/A Received 6/3/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 6/24199 <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 °/u Notes* <br /> Batch. 9060226 Date Prepared, ,6/14/99 Extraaton Method. EPA 5030D(MeOU) <br /> Blank 9060226-BL K 1 <br /> Purgeable Hydrocarbons 6/14/99 ND mg/kg 1 00 <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 Trnfluorotoluene 0200 0 143 600-140 715 <br /> LLS 9060226-13S] <br /> Benzene 6114/99 0200 0209 mg/kg 700-130 105 <br /> Toluene 0200 0 215 700-130 108 <br /> Ethylbenzene 0200 0 216 700-130 108 <br /> 0yl <br /> es(total) 0 600 0 648 700-130 108 <br /> _ tert-butyl ether 0200 0 193 700-130 965 <br /> Surrogate a a a Trefluorotoluene 0200 0 150 600-140 750 <br /> MaIrix Spike 9060226-MS1 5906143-11 <br /> Benzene 6/14/99 0200 ND 0 165 mg/kg 600-140 82 5 <br /> Toluene 0200 ND 0 174 600-140 87 0 <br /> Ethylbenzene 0200 ND 0 176 600-140 880 <br /> Xylenes(total) 0 600 ND 0 535 600-140 89 2 <br /> Methyl tert-butyl ether 0200 ND 0 168 600-140 840 <br /> Surrogate a a a-Trifluorotoluene 0200 0 167 600-140 83 5 <br /> Matrix Spike Duu 9060226-MSD1 S906143-11 <br /> Benzene 6/14/99 0200 ND 0 169 mg/kg 600-140 845 25 0 240 <br /> Toluene 0200 ND 0 177 600-140 88 5 250 1 71 <br /> Ethylbenzene 0200 ND 0 179 600-140 89 5 250 1 69 <br /> Xylenes(total) 0 600 ND 0 542 600-140 903 25 0 1 23 <br /> Methyl tent-butyl ether 0200 ND 0 167 600-140 83 5 250 0 597 <br /> Surrogate a a a-Trifluorotoluene 0200 0 167 600-140 83 5 <br /> —W-- <br /> Sequoia Analytical-Sacramento "Refer to end of report for text of nates and definitions <br /> Page 7 of I 1 <br />