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Striker Avenue Suite 8 <br /> Sequoia g19Sacramento CA 95834 <br /> 4D (916) 921-9600 <br /> aw Analytical FAX(916) 921-0 100 <br /> SECOR International Project ARCO 595,Stockton,CA Sampled 9/15/99 <br /> 9912 Business Park Dr,Ste 100 Project Number NIA Received 9/15199 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 9116199 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFTIQuality 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 9090148 Date Prepared 9116.199 Extraction Method EPA 5030E McOH <br /> Blank 9090148-BLK1 <br /> Purgeable Hydrocarbons 9116/99 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 0205 600-140 102 <br /> LCS 9090148-13S1 <br /> Benzene 9/16199 0200 0 203 mg/kg 700-130 101 <br /> Toluene 0200 0 195 700-130 975 <br /> E !benzene 0 200 0 203 700-130 101 <br /> Wes(total) 0 600 0 546 700-130 91 0 <br /> YJ <br /> tert-butyl ether 0200 0 159 700-130 795 <br /> Surrogate a a a-Tr fluorotoluene 0200 0 214 600-140 107 <br /> Matrix Spike 9090148-MS1 5909202-01 <br /> Benzene 9/16199 0200 ND 0 171 mg/kg 600-140 85 5 <br /> Toluene 0200 ND 0 168 600-140 84 0 <br /> Ethylbenzene 0200 ND 0 177 600-140 88 5 <br /> Xylenes(total) 0 600 ND 0 488 600-140 81 3 <br /> Methyl tert-butyl ether 0200 ND 0 149 600-140 745 <br /> Surrogate a a,a-Tnfluorotoluene 0 200 0200 600-140 100 <br /> Matrix Spike Dup 9090148-MSD1 5909202-01 <br /> Benzene 9/16/99 0200 ND 0 170 mg/kg 600-140 850 250 0 587 <br /> Toluene 0200 ND 0 163 600-140 815 25 0 302 <br /> Ethylbenzene 0200 ND 0 176 600-140 880 25 0 0 567 <br /> Xylenes(total) 0 600 ND 0 488 600-140 813 25 0 0 <br /> Methyl tert-butyl ether 0200 ND 0 144 600-140 720 25 0 3 41 <br /> Surrogate a,a,a-Tnfluorotoluene 0200 0206 600-140 103 <br /> 0 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 7 of 11 <br />