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06 April 2012 AGE-NC Project No. 95-0184 Page 6 of 7 3.3. INSTALLATION OF SVE/IAS SYSTEM PIPING Currently piping is installed 12-inches below the surface of the site and routed from the SVE well heads to the vapor extraction unit. Additionally, PVC tubing and ball valves will be connected and routed from each designated IAS well head# to the IAS system. The proposed SVE/IAS piping system will be installed within the current remediation compound. Air should be supplied to each of the IAS points via piping by a compressor or blower-driven IAS unit capable of approximately 5 to 10 psi to each sparging well at a rate of 2 to 3 scfm. The proposed IAS system will consist of a 5-horsepower, electric air compressor that will generate a regulated pressure of clean air to be injected beneath the watertable. From the outlet of the air compressor(located inside the treatment compound), 1-inch diameter PVC piping will connect to an IAS tubing manifold network; the IAS manifold will consist of a network of PVC ball valves, pressure gauges, air flow gauges and air pressure regulators for added controls to each individual air sparge well. A PVC ball valve, an air pressure gauge, an oil filter and an air pressure regulator will be installed at the outlet of the air compressor for added controls. 1 3.4. SVE/IAS REMEDIATION OPERATION AND MONITORING D dor the SVE, the catalytic oxidizer unit will be used to apply a vacuum to VW2A and aV,VWSA/B. The induced vacuum will be measured at these wells. Soil vapor concentrations 5d from the extraction wells will be measured at regular or a minimum weekly intervals throughout the remediation. Several parameters, including radius of influence, sparging rate, sparging vapor concentrations, soil vapor pressures, ground water depths and dissolved oxygen, will be measured at surrounding wells, both vertical and laterally for spacial distribution. The induced pressure at monitoring points, sparging rate (discharge rate),vapor concentrations at monitoring points, depth to ground water in surrounding wells and most crucially dissolved oxygen will be measured prior to the startup of the IAS remediation to demonstrate a baseline for geochemical (anaerobic zone) and monitored throughout the IAS remediation. The extraction well vacuum, induced vacuum at monitoring points, extracted hydrocarbon concentrations and extraction flow rate will be measured at regular intervals throughout the remediation as required for evaluating soil vapor recovery and destruction. Data will facilitate any required changes to the design of the current SVE system (new wells and will-be used to-determine_the spacing of the vapor wells to be compatible with the IAS remediation and aide in recovery of the volatilized hydrocarbons. Advanced CeoEnvironmental,Inc.