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L 1 1 1.# !_ s i< t • 4 - L r? 's. Page 4 - 1120-3932 We anticipate relatively light structural loads. The existing fill is composed primarily of miscellaneous debris with some soil mixed with it. This fill would be unsuitable for support of any building foundations or even the floor slab. In addition, the fill is underlain in most areas with swamp deposits. It is quite probable that the swamp deposits are still consolidating under the weight of the fill. This additional consolidation is a significant factor in the design of piles. On the basis of the borings, it appears that it may be feasible to support a portion of the structure on spread footing foundations. This would be the extreme westerly portion of the building. We would suggest excavating this area of all existing fill and any swamp deposits that may be encoun- tered below the fill and placing a controlled,. compacted fill'to floor elevation. Spread footings could then be supported directly on the natural soil or compacted fill at minimum elevation. Where footings are supported on compacted fill, the excavation and compacted fill should extend beyond the edges of the footings a distance equal to the depth of compacted fill beneath the footings. In the majority of the site, the depth of fill and swamp deposits is too deep to economically remove and replace with a controlled fill. This process would be further complicated by the ground water level. Therefore, it is our opinion that in the majority of the site, it would be necessary to support both the structural frame and the floor. slah.cn'piling. •• The piling should be driven through the fill and swamp deposits to an adequate penetration into the underlying coarse alluvial depc_its. None of the GC?f I'd-L1M