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a <br /> .Y <br /> . SVE QUARTERLY OPERATION AND PERFORMANCE: <br /> Equipment Inventory: King, Buck&Associates MMC-5A <br /> Catalytic Oxidizer(100-scfm) <br /> Ingersol Rand OL5 5HP Compressor <br /> Operating Mode: Catalytic <br /> SJVUAPCD Permit No.: N-4124 <br /> Total Petroleum Hydrocarbons (TPH) <br /> Conc. End of Period (lab): 990 mg1m3(940 mg/rn3 influent to catox) <br /> Benzene Conc. End of Period (lab): <0.50 mglm3(0.71 mglm3 influent to catox) _ <br /> Flow Rate End of Period: 60 <br /> Applied Vacuum This Period: 40-50 inches water column <br /> HC Destroyed This Period (lab): 246.09 lbs as TPHG <br /> Utility Usage(electrical/gas/propane): 7168 kilowatt hours <br /> Operating Hours This Period: 938.7 <br /> Percent Time Operational: 34% <br /> Number of Auto Shutdowns: 1 (power outage) <br /> CURRENT SOURCE (BEFORE DILUTION) INFLUENT SUMMARY (LAB): <br /> • Total Petroleum Hydrocarbons as <br /> Gasoline(TPHG) Conc.This Period: 880 Mg/M3(average) <br /> TPHG Conc. Last Period: _ 680.33 mg/m3(average) <br /> Initial TPHG Conc.: 9,870 mg/m3 (November 28, 2000) <br /> Benzene Conc.This Period: <0.50 mglm3(average) <br /> Benzene Conc. Last Period: <0.05 mg1m3(average) <br /> Initial Benzene Concentration: 60.1 mg/m3(September 28, 2000) <br /> DISCUSSION: <br /> TPHG and BTEX were not detected in the samples collected from monitoring wells MW-2 through MW-5, <br /> consistent with the previous quarter. TPHG, BTEX, and MTBE was detected in the sample collected from <br /> monitoring well MW-1 at concentrations of 540 gglL, 43 pg/L, 160 pg/L, 13 pg/L, 76 pg/l- and 1,900 pg/L, <br /> respectively. The increase in concentrations at MW-1 may be attributed to the rising water. Total xylenes <br /> were also detected in the sample collected from monitoring well MW-6 at a concentration of 0.73 µglL. <br /> MTBE was detected in the samples collected from monitoring wells MW-1, MW-2 and MW-6 at <br /> concentrations of 1,900 pg/L, 1.3 pg/L, and 21 pg/L, respectively. No free product was found in vapor <br /> extraction well VW-5D during the third quarter. <br /> As requested in the San Joaquin County Public Health Services' letter dated September 26, 2001, Delta <br /> sampled vapor wells VW-1, VW-2, VW-3, VW-4, and VW-51D. Well VW-5S was dry. TPHG was detected <br /> in wells VW-2, VW-3, and VW-5D at concentrations between 180 and 54,000 pg/L. Benzene was <br /> detected in wells VW-1, VW-2, VW-3, and VW-5D at concentrations between 2.5 and 840 pg/L. MTBE <br /> was detected in all five of the vapor wells at concentrations between 1.5 and 100 pg/L. Well VW-5S was <br /> P:\ARCO\0548\QTRLY12001\Arco-054S-4QOI.doc Delta <br />