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680 <br /> City CA <br /> 364-9600 FAX(650�364-9233 <br /> esapeake <br /> Sequoia 404 Idh Wiget Lae W not Creek CA 945983 (9205)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921 9600 FAX(916)92 1-0 100 <br /> 455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792-1865 FAX(707) 792 0342 <br /> Analytical :551 Industrial Road San Carlos CA 94070 41 1 1 (650) 232 9600 FAX(650) 232 9612 <br /> SECOR International Project ARCO 2133,Stockton,CA Sampled 3/18199 <br /> 9912 Business Park Drive,Ste 100 Project Number 7G600-019-04 Received 3118199 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 3/23199 <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. 9030265 Date Prepared. 3/19199 Fxtractlon Method. EPA 5030B(MeOH) <br /> Blank 9030265-BL KI <br /> Purgeable Hydrocarbons 3/19/99 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-Triuorotoluene 0200 0 197 600-140 985 <br /> LCS 903Q265-1351 <br /> Benzene 3/19199 0200 0201 mg/kg 700-130 101 <br /> Toluene 0200 0 212 700-130 106 <br /> Ethylbenzene 0200 0 21 1 700-130 105 <br /> enes(total) 0 600 0 581 700-130 968 <br /> Whyl <br /> tert-butyl ether 0200 0 185 700-130 925 <br /> urrogate a a a-Trifluorotoluene 0200 0 210 600-140 105 <br /> Matrix Spike 9030265-MSI S903222-05 <br /> Benzene 3/19199 0200 ND 0 185 mg/kg 600-140 925 <br /> Toluene 0200 ND 0 199 600-140 995 <br /> Ethylbenzene 0200 ND 0 197 600-140 98 5 <br /> Xylenes(total) 0 600 ND 0 547 600-140 91 2 <br /> Methyl tert-butyl ether 0200 ND 0 159 600-140 795 <br /> Surrogate a a a-Trifluorotoluene 0200 0 193 600-140 965 <br /> Matrix Spike Duo 9030265-MSDI S903222-05 <br /> Benzene 3/19199 0200 ND 0 187 mg/kg 60 0-140 935 25 0 108 <br /> Toluene 0200 ND 0200 600-140 100 250 0 501 <br /> Ethylbenzene 0200 ND 0200 600-140 100 250 1 51 <br /> Xylenes(total) 0 600 ND 0 554 600-140 923 250 1 20 <br /> Methyl tert-butyl ether 0200 ND 0 171 600-140 855 250 7 27 <br /> Surrogate a a a-Trifluorololuene 0100 0200 600-140 100 <br /> guoia Analytical - Sacramento *Refer to end of report for text of notes and definitions <br /> Page 5 of 9 <br /> Sandra R Hanson,Client Services Representative <br />