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are stored (10). As shown in table III, all constituents are below the MnPCA-suggested maximum values. Landfill Procedures Figure 4 (map 2b), the cell-location plan depicts: (1) the areal limits of 23 proposed cells (to be filled one per year) with local base or swail a~d (finished) upper-land-surface altitudes; (2) the position of interim drainage ditches; and (3) areal limits and base altitude of the percolation pond and adjacent topsoil storage areas. A tentative schedule of yearly landfilling, a note describing the operating procedures, and a vertical section through a typical "cut and fill" excavation, are presented in the upper right part of figure 4. Figure 4 depicts the sequence of landfi!ling at the time when the excavation for Cell 2 has been completed and just prior to the placement of the concrete wastes within it. As described previously, Cell 0, the initial cell, would be excavated at the northern limit of the proposed Site for the storage of an estimated 2,750 yd3 (11) of Prestressed's concrete wastes (12). The base of the excavation for Cell 0 and all the other numbered cells is designed to be at least 6 ft above the mean yearly water-table surface (fig. 2). The general sequence of the proposed landfilling operations, as depicted on figure 4, would be as follows. The Prestressed concrete wastes would be placed in Cell 0, compacted to at least a density of 2,500 lbs/ft~ (about 40% porosity) with a Caterpillar (13) bulldozer and covered by a layer of sandy materials (fig. 8) that had been previously excavated from the cut. The sandy soils would have been cast to the north when the cut for Cell 0 was excavated to positions no closer than 30 ft from the proposed eastern roadway and west property boundary. The uppeI~ost organic-bearing R.K. Hoagberg Associates. Inc. Consulting Geologists 8803 15