1613 ORCA VIEW LN 2016-01-01 MF Import

DAVID L. NELSON AND ASSOCIATES, INC. Cunsulting Enginecring Gcology December 5, 1987 Project No. 14187 Page 4 Residence foundations, consisting of conventional spread or continuous type, should be placed a minimum of 12 inches into the dense basal glacial soils, or about 4.5 feet below grade, within 50 feet of the top-of-slope or utility easement. Areas behind the 50 foot area could utilize footings placed directly upon the basal glacial soils, or about 3.5 feet below grade. All footing areas should be clean, dry and compact prior to placement of footing concrete. Footings should be sure to occur within the dense basai soils, and not within loose surface soils or artificial fill. Adequate drainage should be provided around the structure and site area. We suggest the use of foundation and roof drain systems, independently directed � into the main storm drainage system. Site grading should be performed so that � no surface waters are allowe6 to freely flow over the top-of-slope, but are � directed into the main drainage system. � W2 suggest the drainage and backfilling procedures shown on the enclosed � f Subdrain & Backfill Schemes (sheets S-1 and S-2) be utilized within this site. i Absolutely no filling should be perf�ormed within the building setback areas, ! including temporary excavation soils. Landscaping with9n the setback could be performed, but should be limited to ex:sting grade with no filling. Observation of the site earth��ork phase of development should be performed, to determine that footing ;oils are adequate. Although we do expect site soil types, conditions ard distributions to be as stated, some variations could occur. Should conditions other than those discussed herein be encountered, the geotechnical consultant should be notified for review and comment. Additional or alternative r�commendations may be required.