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rtl <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 /> Cone. End of Period (lab): 240 m�lm3(180 Mg/M3 influent to catox) <br /> Benzene Cone. End of Period (lab): X0.050 mg/m3 X0.050 mg/m3 influent to catox <br /> Flow Rate End of Period: 44 cfm <br /> Applied Vacuum This Period: 46-47 inches water column <br /> HC Destroyed This Period (lab): 96.37 lbs as TPHG <br /> Utility Usage(electrical/gas/propane): 9298 kilowatt hours <br /> Operating Hours This Period: 1230 <br /> Percent Time Operational: 82.6% <br /> Number of Auto Shutdowns: 1 (System Shutdown during May 2002, <br /> Consultant Transition) <br /> CURRENT SOURCE (BEFORE DILUTION) INFLUENT SUMMARY(LAB): <br /> Total Petroleum Hydrocarbons as <br /> Gasoline(TPHG) Cone. This Period: 295 mg/m3(average) <br /> TPHG Cone. Last Period: 823.33 Mg/M3(average) <br /> Initial TPHG Cone.: 9,870 mg1m3(November 28, 2000) <br /> Benzene Cone.This Period: X0.275 mg/m3(average) <br /> Benzene Cone, Last Period: 1.2 mg/m3(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-6. <br /> TPHG, benzene, toluene, total xylenes, and MTBE were detected in the sample collected from monitoring <br /> well MWA at concentrations of 420 pg/L, 2.2 pg/L, 2.4 pg/L, 1.0 pg/L, and 770 pg/L, respectively. MTBE <br /> was detected in the samples collected from monitoring wells MW-2 and MW-6 at concentrations of <br /> 1.4 µg/L and 7.7 µg/L, respectively. 1,2-DCA was detected in the samples collected from wells MW-2 <br /> (1.5 µg/L) and MW-6 (3.7 µg/L). <br /> As requested in the San Joaquin County Public Health Services' letter dated September 26, 2001, Stratus <br /> .sampled vapor extraction wells VW-1, VW-2, VW-3, VW-4, VW-5S, and VW-5D. Wells VW-1, VW-2, <br /> VW-3, VW-4, VW-5S and VW-51D were not purged prior to sampling because the screened intervals in <br /> these wells are not submerged, and the wells were not purged during previous sampling events. Free <br /> product was not found in vapor extraction well VW-5D during the second quarter 2002. TPHG and BTEX <br /> were detected in the sample collected from well VW-51D. TPHG was also detected in the samples <br /> collected from wells VW-4 (59 µg/L) and VW-5S (190 µg/L). MTBE was detected in the samples collected <br /> PA1Bp-Arco forURS15481Quarterly\Arco_0548_2QO2.doc Stratus <br />