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t <br />Page 6 - #120-10689 <br />Discussion <br />The existing fill, swamp deposits and soft alluvial clays are <br />comprp-gible and should not be relied upon for foundation or floor <br />slab support. Since the majority of these compressible soils were <br />encountered along the western portion of the site, it would be <br />beneficial to construct the proposed building as far as possible to the <br />east and particularly utilize the southeastern portion of this site. <br />In our opinion, it should be feasible to support the proposed elderly <br />housing building on a spread footing foundation system after excavating <br />the unsuitable soils are+ placing a compacted fill to grade. For a <br />concrete structure of this size, it should be more economical to design <br />foundations for an allowable bearing pressure of 5000 psf, versus a <br />lower bearing pressure even if some additional subcutting of the soft <br />to medium glacial till soils is required. We have therefore based our <br />recommendation on preparing the site to support a 5000 psf allowable <br />soil bearing pressure in the five story area and have also included <br />recommendations for li;-iter foundation loads in the one story portion <br />of the building. <br />SOIL eXPLOR �tl <br />