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Van Weerdhuizen Proposal Page 2 <br /> nitrate molecules in the water may percolate through the soil <br /> profile and potentially into the groundwater. To prevent this <br /> ponding effect, the open-air corral area will be graded with the <br /> slope in a northward direction. This sloping will conduct water <br /> onto pasture land located on the north section of Parcel #1. <br /> The second area of concern is the covered free-stall corral <br /> area. This is referred to as the "corral area" in the soil <br /> analyses results. It is proposed that the free-stalls and <br /> stanchions will remain "as is" for the future heifer operation. <br /> Water percolation will be greatly retarded in this area since it <br /> is covered, and there are concrete alleys. The water in a small <br /> lagoon adjacent to this free-stall area will be drained onto <br /> pasture land and any residual manure will be transported off-site. <br /> Depending on the amount of manure present in this lagoon, the <br /> underlying soil may be excavated and spread in a manner discussed <br /> in the next paragraph. This lagoon will then be back-filled with <br /> clean import material. <br /> The third area of the subject parcel which possesses the <br /> greatest potential of contamination to the underlying groundwater <br /> is the wastewater lagoon. To remediate the high levels of NO3-N, <br /> TKN and TSS, the following is proposed: The manure in the lagoon <br /> will be excavated and transported off-site. After removal of the <br /> manure, the underlying soil will be excavated to the hardpan layer. <br /> This layer was located between 4 to 5 ft below the soil surface of <br /> the lagoon during our sampling procedures. The amount of excavated <br /> soil is calculated to be approximately 91, 000 cu ft. The soil <br /> excavation will proceed with as much mixing as possible of the <br /> lagoon soil horizons to "average" the concentration levels of NO3- <br /> N1 TKN, and TSS. After the excavation of the lagoon soil, the <br /> embankments of the lagoon will be used as back-fill . The excavated <br /> soil will be spread over the pasture areas of Parcels 1, 2 and 3 <br /> by the use of a "floater" type spreader. The soil will not be <br /> ~m' ality (-control Inspection <br />