7408 2ND DR SE 2016-01-01 MF Import

'4. , . .. ,,.1 Y - - _ . . sc�s Tln,�s�. t �_1}�'x��y�..�-,�1-�y"�ti�, .L'�*-��2�� A� ^„-'x r� - F 7YF ....0 ic�.Y` .,_�t n',� . � r f ' .4� I r .i ' ( +'_ s' '"f. �1 .f"~ S�a�:. � • .. F T- � . .r . � .•� � .cd A t ` u 1 Ai♦ J .°a ' . . . _ . . ^5'. {.' . .?.,�d�.- . . . . . . . _l: . . , . . . . , _ . ' _ . . . . . Afarch 25, 1994 I��jec�1607 Findings Lots 2 and 3 are underlairt by about eight feet of fill material. The material consists of silty sands and gravels. The upper four to five feet of material ranges in consistency from medium dense to dense. 'This upper material has a relati�e compaction of about 90 percent (based on ASTM D-1557). The deeper material is l ess compact but appears , to be medium dense. The fill mater�al is relat�vely clean and low in organic content. 'I'he underlying native soil is a dense silty clayey gravelly sand. I.ots 4 and 5 are underiain by up to four feet of inedium dense fill material. The fill material is relatively clean and low in organic content. The underlying native soil is a dense silty clayey gravelly sand. Conclusions The fill was reportedly placed over fifreen years ago. It appears that the setdement of the �ll has stabil�zed. The upper four to froe feet of inedium dense to dense sc�ls should provide a suitable structural raft for the light residential structures. The weight of the structure should be offset by the material excavated from the building area, to create a level building pad. To compensate for irregu?arities in the soi�s underlving the building pads, the structure� should be supported on continuous structural foundations as discussed below. � Recommendations � i Subgrade Preparation The cohesive surface soils are prone to softening during periods of heavy rain due to localized surface n:.iding. If ponded water exists in the pr�posed footmg areas the ponds must be d�eined by constructing sumps adjacent to the footmg line and pumping or bailing Just prior to concrete placement. Any loose surface soil in the footing line must then be removed with a flat shovel or scraping device. Building Foundations- Lots 2 and 3 Reinforced concrete continuous footings may be designed to impose pressures on foundation soils up to�pounds per square foot from dead plus normal live loading provided the resulting foundation w�dth �s not less than 12 inches for one story and 15 mches for hvo story portions of the structure. Where standard building plans are used assuming an allowable bearing ca�acity of 2000 pounds per square foot, the footing width should be widened by one third (Example: if the plan calls for an 18"wide footing the constructed footing would now be a 24"wide footing). �;�=.�..::�:� , . .. Page 2 i � ._ .. . _ -;Tt• � � _,. , ' . :: . �S ".. �°-: _ _. . , � �, - � _ .. . ::k:-::• . . . .. .