9606 19TH AVE SE McDONALDS Geotech Report 2018-01-02 MF Import

GEOTECHNICAL ENGINEERING STUDY McDonald's Corporation June 9, 1995 E-6893-1 Page 4 This report has been prepared for specific application to this project only and in a manner consistent with that level of care and skill ordinarily exercised by other members of the profession currently practicing u:,Jer similar conditions in this area for the exclusive use of the McDonald's Corporation and `heir representatives. No warranty is expressed or implied. It is recommended that this report, in its entirety, be included in the project contract documents for the information of the contractor. Site Preparation and Grading Construction areas should be cleared and stripped of all vegetation, fill piles, topsoil and other deleterious materials. After stripping and clearing procedures are complete, earthxvu,k operations may commence to provide the design grades. Surfaces where fill, foundations or pavements are to be placed should be observed by a representative of ECI. Proofrolling may be required in localized areas and should be performed under tha observation of a representative of ECI. Soil in any loose or soft areas, if recompacted and still excessively yielding, should be overexcavated and replaced with structural fill to a depth that will provide a stable base. The soils exposed in our test pits are moisture sensitive due to their high fines content. As such, in an exposed condition they may become disturbed from normal construction activity especially when in a wet or saturated condition. Once disturbed, and in a wet condition, they will be unsuitable for support of foundations or pavements. Therefore, during construction where these soils are exposed and will support new structures, care should be exercised not to disturb their condition. If disturbed conditions develop, the affected soils must be removed and replaced with a structural fill. The depth of removal will be dependent on the level of disturbance developed during construction. Structural fill is defined as any compacted fill placed under foundations, roadways, slabs, pavements, or any other load -bearing areas. Structural fill under foundations should be placed in horizontal lifts not exceeding twelve (12) inches in loose thickness and compacted to a minimum 90 percent of its maximum dry density determined in accordance with ASTM Test Designation D-1557-78 (Modified Proctor). The fill materials should be placed at or near the optimum moisture content. Fill under pavements and walks should also be placed in horizontal lifts and compacted to 90 percent of maximum density, except for the top twelve (12) inches which should be compacted to 95 percent of maximum density. Earth Co uhmts, Inc.