1001 N BROADWAY Geotech Report 2018-01-02 MF Import

' J-736 Page 12 I J J � i � J LI 1 � 0 minimum 4 inch thickness of clean, well graded granular mat- erial compacted to 95 percent of the Modified Proctor dry den- sity to provide a working surface for placement of forms and reinforcing steel. Totai and differential settlements are estimated to be less than or equal to about 1/•2 inch and 3/8 inch, respectively, where the footings are founded on the undisturbed very dense GLACIAL TILL. However, the SILT soils, and new compacted structural fill will tend ta be,more compressible than the GLACIAL TILL soils. Difierential settlement should be expected to occur between that portion of the structure founded on TILL and that portion founded on SILT or structural fill. In our opinion, these total and differential settlements would be on the order of 1 and 3/4 inch respectively. , These estimates are ba:;ed on the previously stated reco�endation concerning bearing pressure, footing dimensions and depth of '� burial. We also believe that the majority of settlements will occur during construction. We furt2ier recommend that all footing excavations be inspected , by a representative from Hazt-Crowser and Associates prior to placement to confirm apgropriate measures have been taken to � adequately prepare the bearing surface, and observe the subgrade soils fc>r any changes from the anticipated conditions. Slabs-Oti-Grade In our opinion, the interior floors of the proposed building could be const:ructed as slab-on-grade placed on natural subgrade soils or new compacted structural fill compacted to the previously re- co�ended 95 percent density. We recoffiend the floor slab be imderlain by a minimum 4-inch layer of clean (less than.5 percent