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Z C i� After the liner has been placed, monitor wells MW1 and HWS along with vapor Extraction wells P1, P3 and EX will be manifolded for vapor extraction. `the manifold, will contain the orifice, valve and sample ports for each individual well, so all adjustments and measurements can be made and/or obtained with miminal disturbance to the well heads, and the monitoring of the system may be accomrlished more efficiently. The manifold will be constructed of 2" galvanized threaded pipe attached to the five 2" galvanized Tees. Each Tee will have a needle valve threaded to it and then the sample/vacuum port orifice attached to the well side of the valve. Ons and one quarter inch PVC tubing will be run from the sample/vacuum port orifice assembly to each individual well. To inhan,.e vapor recovery, WEGE is researching a cost efficient hct clean air injection system, to inject heated clean air along the perimeter of the soil contamination plume at monitor wells MW2, HW3, MW4, HW6 and porsibly MWS. The blower to be used is an explosion proof, 3HP, 3450 RPM Cincinnati Fan, capable of Producing . approximately 200 c€m air flow at 12" wa-Ler pressure. The heat sots^ae will be heated air captured From the ceiling ` mounted gas hater in the store. A hood will be constructed above the heater to collect the :lot air bg'the vacuum generated by the Cincinnati Fan. A, pump pypass will be situated on the fan to ate the captured hot air through the fan to increase the circulate of the air prior to pushing the air to the insulated temperdistribution line that will channel the hat air under approximately 0.2 psi to the. ground water monitoiring wells to be used for hot air injection. At the wells a distribution Tee will be installed off of the distribution line along with a valve to control the amount of hot air to be injected int- the well with the orifice sample/pressure reading ports and a thermometer placed on t::G`well head Tee. Thermometers will also be placed at each vacuum recovery well, to document the amount of heat transfer that is ocouring to;the extraction points during the operation of the vapor extraction remediation. T."he monitor wells are slotted from the 30 foot depth to the 6o foot depth, but. the vertical influence will be from the top of the sand pact, at the 25 foot depth to top of ground water, which ranges between 45 to 56 feet below the surface. During the injection of ho'v air heat transfer will occur along the distribution lines and within the wells themselves -. ---through--through -the--casing---into---the--sand- .pac7c.-._.and---_firing to_ the _- - ---..__. ----- - formation. In no event shall the temperature pesteing:the well exceed 140oF. CALCULATING RESULTS AIR- SAMPLES page 6