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PmK Pkpo kr Air MSM co <br /> 6camded P"Vapv Baacn-Teo <br /> 6131 Pecillc Ave .Stockton,Cetilomle <br /> BACKGROUND AND EQUIPMENT DESCRIPTION <br /> Upon receipt of the San Joaquin Valley Unified Air Pollution Control District's (SJVUAPCD) <br /> executed "Application for Authority to Construct" and "Interim Variance/Variance Not To <br /> Exceed 90 Days Duration, Aegis personnel temporarily installed on site, on <br /> November 27, 1991, a Model V4 BACT soil venting engine manufactured by VR Systems <br /> of Anaheim, California. The installation included: a) manifolding the two VEW and <br /> horizontal slotted piping to the IC unit (Figure 2); b) installation of an alternative energy <br /> source (propane); c) installation of security fencing; and, d) safety notification. <br /> The VEW were installed by Aegis in July 1990. Well VEW-1 was installed to 20 feet below <br /> surface with the screened interval from 5 to 20 feet below surface. Well VEW-2 was <br /> installed to 46 feet below surface with the screened interval from 21 to 46 feet below <br /> surface. <br /> The V4 IC unit includes: <br /> 1. Two (2) Ford industrial internal combustion engines, Model LSG-875, liquid- <br /> cooled V8, 460 cubic-inch displacement, 150 BHP each. <br /> 2. Two (2) Car Sound 3-way/2-way catalytic converter. <br /> 3. Computerized Stoichiometric Fuel Regulators, manufactured by VR. <br /> Operation of the IC unit includes the following: a) extraction of vapors from the ground <br /> using the engine manifold vacuum; b) combustion of vapors, as fuel, to run the engine; <br /> and c) passing the exhaust stream through the catalytic converters for final purification <br /> before emission through the exhaust stack. The engine's operation is monitored and <br /> controlled by an on-board computer system that drives the master control unit. The <br /> master control unit monitors and directs the air/fuel ratio for optimum combustion of TPH <br /> in the air stream and efficiency of the engine. <br /> AIR MONITORING <br /> The monitoring of TPH concentrations in inflow to and exhaust from the V4 treatment unit <br /> consists of three (3) test periods of approximately fifteen (15) minutes each per day, <br /> performed two (2) days per week per the requirements of the SJVUAPCD. On <br /> December 26 and 27, 1991, Aegis personnel monitored influent and effluent TPH <br /> concentrations for three 15-minute intervals. Concentrations of TPH in the air streams <br /> were measured by a Foxboro 128 Century Model organic vapor analyzer. All influen <br /> to the V4 unit during this week was drawn solei from well VEW-2. <br /> -2. <br /> 90-0201.RRf <br />