4945 OCEAN AVE 2018-01-02 MF Import

GEOTECHNICAL ENGINEERING STUDY Mr. Rick Remsing May 5, 2003 E-10558 Page 10 Permanent cut and fill slopes should be inclined no steeper than 2H:1 V. Cut slopes should be observed by ECI during excavation to verify that conditions are as anticipated. Supplementary recommendations can then be developed, if needed, to improve stability, including flattening of slopes or installation of surface or subsurface drains. In any oase, water should not be allowed to flow uncontrolled over the top of slopes. Permanently exposed slopes should be seeded with an appropriate species of vegetation to reduce erosion and improve stability of the surficial layer of soil. Site Drainage Slight groundwater seepage was encountered in Test Pits TP-3 and TP-4 at thirteen 0 3) and four feet respectively. Groundwater seepage should not be significant in the drier summer months, however, if seepage is encountered in foundation or grade beam excavations during construction, the bottom of the excavation should be sloped to one or more shallow sump pits. The collected water can then be pumped from these pits to a positive and permanent discharge, such as a nearby storm drain. If significant seepage is encountered, ECI should be contacted to provide additional recommendations. During construction, the site must be graded such that surface water is directed off the site. Water must not be allowed to stand in areas where buildings, slabs or pavements are to be constructed. Loose surfaces should be sealed at night by compacting the surface to reduce the potential fo. moisture infiltration into the soils. Final site grades must allow for drainage away from the building foundations. The ground should be sloped at a gradient of 3 percent for a distance of at least ten feet away from the buildings, except in paved areas, which can be sloped at a gradient of 2 percent. Footing drains should be installed around the building perimeters where retaining wall drains are not present, at or just below the invert of the footing, with a gradient sufficient to initiate flow. A typical detail is provided on Plate 4. Under no circumstances should roof downspout drain lines be connected to the footing drain system. Roof downspouts must be separately tightlined to discharge. Cle.1nouts should be installed at strategic locations to allow for periodic maintenance of the footing drain and downspout tightline systems. Ecrth Consultants, Inc.