4933 GLENWOOD AVE 2016-01-01 MF Import

Jordan Construction � � JN 00284 Jul�� 25, 2000 Page 7 soils is Type C and should not be excavated greater than a 1.5:1 (H:V) slope extending continuously between the top and the bottom of the cut. The above-recommended temporary slope inclinations are based on what has been successful at other sites with similai soil conditions. Temporary cuts are those that will :emain unsupported for a relatively short duration to allow for the construction of ioundations, retaining walls, or utilities. Temporary cut slopes should be protected with plastic sheeting during wet weather. The cut slopes should aiso be backfilled or retained as soon as possihle to reducP the potential for instability. Please note that sand and loose soil can cave suddenly and without warning. Excavation, foundation, and utility contractors should be made especially aware of this potential danger. All permanent cuts into native soil should be inclined no steeper than 2:1 �H:V). Any disturbance to the existing slope outside of the building limits may reduce the stability of the slope. Damage to the existing vegetation and ground should be minimized, and any disturbed areas shouid be revegetated as soon as possible. Soil from the excavation should nut be placed on the slope, and this may require the off-sile disposal of any surplus soil. DRAINAGE CONSIDERATIONS We recommend the use of footing drains at the base of all footings and earth-retaining walls. These drains should be surrounded by at least 6 inches of 1-inch-minus, wcshed rock and ihen wrapped in non-woven, geotextile filter fabric (Mirafi 140N, Supac 4NP, or similar material). At its highest point, a perforated pipe ii�vert should be at least 6 inches below the bottom of a slab floor or the level of a crawl space, and it should be sioped for drainage. Drainage should also be provided inside ihe footprint of a structure, where a crawl space will slope or be lower than the surrounding ground surface or an excavation for a building will be close to the expected high groundwater elevations. We can provide recommendations for interior drains, should they become necessary, tluring excavation and foundation construction. All roof and surface water drains must be kept separate from the foundation drain system. A typical drain detail is attached to this report as Plate 4. For the best long-term performance, perforated PVC pipe is recommended for ail subsurface drains. No groundwater was observed during our fieidwork. If seepage is encountered in an excavation, it should be drained from the site by directing it through drainage ditches, perforated pipe, or French drains, or by pumping it from sumps interconnected by shallow connector trenches at the bottom of the excavation. GENERAL EARTHWORK AND STRUCTURAL FILL Ail building and pavement areas should be stripped of surface vegetation, topsoil, organic soii, and other deleterious material. It is very important that existing foundations, septic systems, and pertaining drain fields be removed before site development. The stripped or removed materials should not be mixed with any materials to be used as structural fill, but they could be used in non- structural areas, such as landscape beds. ��l � GEOT[CH CONSULTANTS, INC.