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

� � � � J-/Jb Page 11 o�ould yield a s�able backslope and allow proper compaction. We reco�end t� at a representative from Hart-Crowser & Assoc- iates be prese� L during placement of tt�e structural fill to observe the worx and perform a representative number of in-place density tests. Foundations In our oginion, shallow spread or continuous footings would � provide the most suitable foundation for structural suppor.t. Shallow footings could be founded within densely compacted � strvctural fill, compacted, prerolled near surface SILTS or weathered TILL, or very dense undisturbed GLACIAL TILL. i Spread or continuous footings placed within prerolled near surface soils or densely.compacted structural fill could be designed utilizing a design bearing pressure of 2,500 psf (pounds per square foot), in our opinion. Further, design bear=:= ing values of 5,000 psf could be utilized for design bf footings.. founded within the very dense GLACIAL TILL. Continuous and isolated spread footings should have minimum width of 18 and 24 inches respect`:vely. We recommend that the base of all footings be located a minimum depth of 18 inchea bel.nw the top of the f1oc�• slab or adjacent exterior grad er is lower. If adjacent footings are located at different ele- � vations, we recosmend that the difference between their ele- vation be no greater than the space between them (i.e, 1V : 1H slope). � After excavation to the required depth and prior to placement of footings, the bearing surface should be compacted to a dens., non-yielding surface as previously recou�ended. (Com- pacred to 95 percent of the modified Proctor maximum dry density.) For footings founded within the natural SIL`TS or silty structural fill during wet weather periods, we recommend placement of a . ,_ ., . _ . _ , _ . _ _ _. _ , _ , �. . ,., .. --