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After the liner has been placed, monitor wells MWl and MW5 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 miminaI disturbance to the well heads, and the monitoring of the system may be accomplished more efficiently. i 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. One and one quarter inch PVC tubing will be run from the sample/vacuum port orifice assembly to each individual well. To inhance vapor recovery, WEGE is researching a cost efficient hot clean air injection system, to inject heated clean air along ' the perimeter of the soil contamination plume at monitor wells MW2, MW3, MW4, MW6 and possibly MWS. The blower to be used is an ` explosion proof, 3HP, 3450 RPM Cincinnati Fan, capable of producing approximately 200 cfm air flow at 12" water pressure. The heat source will be heated air captured from the ceiling mounted gas heater in the store. A hood will be constructed above the heater to collect the hot air by the vacuum generated by the Cincinnati Fan. A pump pypass will be situated on the fan to circulate the captured hot air through the fan to increase the temperature of the air prior to pushing the air to the insulated i distribution line that will channel the hot 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 injectea into the well with # f the orifice sample/pressure reading ports and a thermometer placed on the well head Tse. Thermometers will also be placed at each vacuum recovery well, to document the amount of heat transfer that is occuring to the extraction points during the operatics of the vapor extraction remediation. The monitor wells are slotted from t the 30 toot depth to the 60 foot depth, but the vertical influence will be from the top of the sand pack at the 25 foot depth to top of ground water, which ranges between 45 to 56 feet below the surface. During rhe injection of hot air heat transfer will occur > along the distr'bution lines and within the wells themselves through the cas:L I into the sand pack and finally to the formation. Xn no event shall the temperature entering the well exceed 1400F. t CALCULATING RESULTS AIR SAMPLES page 6