7501 HARDESON RD BASE FILE 2018-01-02 MF Import

CASCADE GEOTECHNICAL INC. June 2, 1994 Job No. 9405-02G in this report. Use of the uncontrolled fill would require unusually careful construction observation to avoid incorporating unsuitable material. Due to the content of fines in the silty sand and silt adequate compaction may prove difficult if the moisture content cannot be controlled. Under these circumstances, imported structural fill which conforms to the following gradation should be imported for raising grades: 4 inch 100 #4 25 - 75 #200 5.0 maximum. Based on the fraction passing the X4 sieve. The fill should be placed in maximum eight (8) inch thick loose life and compacted to at least 95 % of the maximum dry density value as determined by ASTM D 1557. 8.3 Foundation Placement The on -site medium dense to very dense silty sand (SM) and sand (Sp), very stiff to hard sandy silt (MIL), or properly placed and compacted structural fill, are suitable for the maximum safe support of building loads up to 2,500 psf. Concrete continuous strip and spread footings may be placed directly on these bearing soils. The in -situ uncontrolled fill and loose soils, forest duff, and organic soils found at the site are not suitable for support of structural loads as unacceptable levels of differential settlement would be expected. With building loads up to a maximum of 2,500 psf, we anticipate total settlement under footings to not exceed one (1) inch and differential settlement to not exceed three-quarters (3/4) of an inch. Since the buildings will be placed on relatively coarse -grained soils, most of the settlement will occur immediately upon imposition of the loads (during construction). Abrupt 11