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PROPOSED WORK <br /> • <br /> The work which has been done confirms the presence of the <br /> concrete impoundment and soil contamination by petroleum products <br /> • within the impoundment. The unknowns which remain are as follows: <br /> 1. The presence or absence of soil or groundwater <br /> contamination beneath the impoundment <br /> • 2. The mobility of the soil contamination present via <br /> percolation of rainwater, to the groundwater <br /> 3. The groundwater gradient in the area <br /> • 4. The need for soil treatment or excavation and/or <br /> groundwater treatment <br /> • Items 1, 2 and 3 will be addressed by drilling monitoring wells to <br /> attempt to determine groundwater contamination, if any, caused by <br /> the impoundment. The issue of soil contamination and its mobility <br /> • will be addressed indirectly. If groundwater contamination is <br /> detected, then additional soils and groundwater work will be <br /> proposed. The groundwater investigation is proposed as follows: <br /> • <br /> 1 . Drill and construct three 4 inch monitoring wells <br /> (BD1-BD3) in the locations shown in figure 2. These <br /> • wells will be screened across the water table and will <br /> allow AEMC to determine water table gradient and sample <br /> for groundwater contamination in those locations. <br /> • These wells will be installed using a hollow stem <br /> auger. Continuous cores will be collected for logging <br /> purposes. All wells will be four inch diameter PVC <br /> • <br /> 9 <br />