SITE INFORMATION AND CORRESPONDENCE

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i Given the shallow proposed screened interval (5 feet), groundwater can be ' collected from this well near the upper surface of the water table. Therefore, future groundwater sampling of this well will likely provide a more representative assessment of the actual contaminant concentrations near the surface of the a water table. Additionally, the location and construction of the extraction well will allow it to be { used for both the soil vapor extraction and groundwater pumping pilot tests. Further, the well will also be adequately sited to allow it :to be used as a remediation well, if necessary, 4. Perform a 4-hour soil vapor extraction pilot test- The soil vapo extraction pilot #est;would determine the suitability of the site to remedlation via s !-vapor— . - The newly-installed extraction well would be used as the soil vapor extraction Point. Air flow rate readings would be monitored at the extraction well Temporary sample points would be driven into the ground to be used to monitor vacuum readings at various distances from the extraction well, Extracted air would be routed through an activated carbon canister to remove contaminants prior to discharge to the atmosphere. Air samples would be collected and analyzed both before and after the carbon canister to determine extraction and destruction efficiencies. 5_ Perform a 4-hour groundwater pumping test. The groundwater pumping test would determine the suitability of the site to remediation via groundwater and/or ` free product extraction. The newly-installed extraction well would be used as the groundwater extraction point. Flow rate readings would be monitored at the extraction well. Existing groundwater monitoring wells would be used-to monitor water table drawdown at various distances from the extraction well. f ' Extracted groundwater would be passed through an activated carbon canister and the water disposed to either the sanitary sewer or storm drain. Water samples would be collected and analyzed both before and after the carbon canister to determine extraction and destruction efficiencies. Permits for the temporary discharge may be needed. A permit fee, if required, has not been included its the accompanying bid cost. If necessary, you can pay this fee directly, and have the Cleanup Fund reimburse you directly. During the groundwater pumping test, the water table will be drawn down, resulting in a localized cone of depression, Should contaminant concentrations exist above their solubility limits, then free product will likely be present. If this is the Case, the free product will accumulate within the cone of depression during the test. Observations will be conducted to determine if the depressed water table yields free product. I