7622 RAINIER DR 2016-01-01 MF Import

i � . CASCADE GEOTECFINICAL June 10, 1991 Lyle Blani: Job No. 9105-16G Page 6 flow into a suitahle outlet. E:oeion Control IAll erosion control measures should meet the City of Everatt I specifications. Silt fences should be used along the north and south property lines and along the twenty-iive (25) foot setback I lines lo�-ated to the east of the creek/drainage ditch. The silt fences should be maintain�d throughout censtruction. Silt control measures should be implemented for the drainage ditches. I If any soils are stockpi.led on the site, ve recommend covering 1.t Iwith plastic sheeting that is securel�� anchored with sandbags and stakes at the end of each wozk day and at the onset of inclement iweather. IFoundation Desian Parematers Firm, horizontal surfaces of the native, undisturhed medium dr.nse Ito very dense silty sand with some gravel (till) and the medium dense to dense sand with some silt and gravel have a maxlmum safi� Ibearing capacity suitable for supporting spread footings designe3 to 2000 psf if the soils are undisturbed, free of org�nic material, I and do not become saturated prior to concrete placement. Structural fill which is placed on firm, unweathered nativu bearing I soils are also suitable for the support of a spread iooting foundation designed as above. The structural fill should meet the recommendr.tions stated in the Structural Fill section of this Ireport. The topsoil noted in the test pits is unsuitable for support of the proposed foundation and slab-on-grade floor siace iunacceptable differential settlement and distress to the slab would � be expected.