5722 FLEMING ST 2018-01-02 MF Import

I Fieming St. Luplex Everett, Washington Cert. No. 854-2G Page 2 the cut. CASCADE GEOTECHNICAL Elevations All elevations or relative grades mentioned in this letter refer to the site grades existinq on April 3, 1985. Conclusions Our site analysis and experien:e in dealing with similar situations leads us to conclude that this site is suitable for placement of the proposed duplex. We would suggest that you comply with the followina recommendations in order to provide suitable foundation support for your building and minimize the erosion potential of the soils along the south side of your lot. Recommendations As stated previously, we understand that the site will be lowered approximately three (3) feet to establish the proposed slab elevation. Judging from the existing fill thicknesses, it appears that most of the building area will be on native soils upon completion of the excavation. The southern footing line and a portion of the west and east footing line may require overexcavation to transfer the footing loads into the natural soils. During excavation for the footings, old stumps may found at the interface between the fill and the natural .soils. These stumps should be totally removed. Should the removal process leave a void beneath the proposed base of footing elevation, the low areas may be backfilled to the base of footing elevation with either the footing concrete or thoroughly compacted onsite soils. Soils to be compacted should be placed in eight (8) inch lift and each lift thoroughly compacted prior to placing the next lift. All footings should be placed on natural undisturbed soils or on the compacted fill as described above. For footings bearing on the natural soils or compacted fill, we would recommend a. maximum allowable soil bearing value of 2,500 pounds per square foot be utilized in the foundation design. We would further recommend that the southern footing line extend into the natural soils a minimum of eighteen (18) inches, measured from the base of footing. The floor slab may be place directly on the existing natural soils or compacted fill soils due to the high quality of these materials. Our observations of the existing fill slope along the south side of the site leads us to offer the following recommendations. It appears that this fill was pushed out over the natural soil: and surficial vegetation without - z 0 M m r