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

CASCADE GEOTECNNICAL INC. June 2, 1994 Job No. 9405-02G 8.0 PREIXMNARY RECOA04ENDA17ONS The following geotechnical recommendations are preliminary as they are based on our understanding of the proposed project at this time. We recommend that we be engaged to review the project's plans in order to provide revised, augmented, or additional geotechnical recommendations as required. 8.1 Subgrade Preparation and Grading We recommend stripping vegetation, forest duff, or organic -rich soil from only the building and paved areas prior to construction. Organic -rich soil may be stockpiled for later use as landscaping material. Soil stockpiles should not be placed on or near slopes, due to the potential for induced instability of the slope or stockpiled soil. Some of the soils at the site are moisture -sensitive due to the content of fines in the soil. The construction of temporary roadways using quarry spans, compacted fill, or geotextile fabric, may be necessary to minimize the disturbance of the on -site soils and to provide a working surface for construction traffic. If problems with soil conditions are encountered during construction in wet weather, we recommend that we be engaged to provide on -site recommendations for stabilization of wet soils during construction and to observe subgrade preparation and excavation so that soil conditions can be continuously monitored. The heavily wooded nature of the site indicates stumps and root masses may be frequently encountered during grading, utility work, and preparation for foundation placement. Where necessary, the stumps, roots, and other organic material should be removed from the foundation and road subgrade soils while minimizing the contamination of structural fill utilized during construction. Stump craters should be filled to grade with properly placM and compacted structural fill. Though none was encountered during our investigation, it has been our experience that sites containing swampy areas in a glacial terrain often show variably thick deposits of peat or other E