1111 80TH ST SW BLDG SHELL 2016-01-01 MF Import

Cornerstone Columbia Development Co. W-6984 5 July 1990 Page 9 suitable discharge point. Roof and surface runoff should not discharge into the footing drain system. Instead, a separate tight line drain system or splash blocks should be used. In those areas where excavations are made, seepage may develop from cut faces. Sur h localized seepage areas should be blanketed by rock to control piping and erosion. 5.0 CLOSURE Based upon our field and office studies, it is our opinion that it would be feasible from a geotechnical standpoint to construct office buildings at this location. Site preparation should be preceded by clearing, stripping of the top soil, and surface water control measures. The building may be supported by conventional footings which bear upon the medium dense to dense naturally occurring sands or compacted structural fill. Special attention to wet weather construction techniques would be required due to the silty nature of the site soils. The conclusions and recommendations contained in this report are based on the test pit explorations accomplished for this study. The number, location, and depth of the explorations were completed within the site and proposal constraints as to yield the information utilized to formulate our recommendations. The future integrity of the building foundations depend upon proper site preparation and construction procedures. We are available to provide geotechnical engineering services after the building locations and grades are established as well as during earthwork and foundation construction phases of the project. If variations in the subsurface conditions are observed at that time, our continued involvement would allow us to provide geotechnical engineering recommendations necessary to reflect the changes in a timely manner.