8615 7TH AVE SE Geotech Report 2018-01-02 MF Import

Subsurface Exploration, Geologic Hazard, and St. Mary Magdalen Sport Court Preliminary Geotechnical Engineering Report Everett, Washington Preliminary Design Recommendations the footing. Thus, footings should not be placed near the edge of steps or cuts in the bearing soils. 11.0 FLOOR SUPPORT Slab -on -grade floors may be constructed over medium dense to very dense native soils or over structural fill placed as recommended in the Site Preparation and Structural Fill sections of this report. Slab -on -grade floors should be cast atop a minimum of 4 inches of pea gravel to act as a capillary break. The floors should also be protected from dampness by covering the capillary break layer with an impervious moisture barrier at least 10 mils in thickness. Additional moisture protection details should be included by the owner and architect, if necessary. Floor slabs that are supported by site soils prepared in accordance with the Site Preparation section of this report or by structural fill should experience 1/2 inch or less of settlement. 12.0 DRAINAGE CONSIDERATIONS All footing walls should be provided with a drain at the footing elevation. Drains should consist of rigid, perforated, polyvinyl chloride (PVC) pipe surrounded by washed pea gravel. The level of the perforations in the pipe should be set at the bottom of the footing at all locations, and the drain collectors should be constructed with sufficient gradient to allow gravity discharge away from the structure. Roof and surface runoff should not discharge into the footing drain system, but should be handled by a separate, rigid, tightline drain. In planning, exterior grades adjacent to foundations should be sloped downward away from the structure to achieve surface drainage. 13.0 PROJECT DESIGN AND CONSTRUCTION MONITORING At the time of this report, site grading, structural plans, and construction methods have not been finalized, and the recommendations presented herein are preliminary. We are available to provide additional geotechnical consultation as the project design develops and possibly changes from that upon which this report is based. We recommend that AESI perform a geotechnical review of the plans prior to final design completion. In this way, our earthwork and foundation recommendations may be properly interpreted and implemented in the design.. April 24, 2006 ASSOCIATED EARTH SCIENCFS, IA'C. tuPan-KE0602MAI-Prolrcnt120060260WE1WP Page 11