2710 VIEWCREST AVE 2016-01-01 MF Import

JN 95192 _ Thomas Kelly page 7 June 7, 1995 outside grade does not slope downwards from a building. Drains should also be placed at the base of all backfilled, earth-retaining walls. These drains should be surrounjed by at least 6 inches af 1-inch-minus, washed rock and then wrapped in non-woven, geotextile filter fabric (Mirafi 140N, Supac 4NP, or similar material). At its highest point, a perforated pipe invert Should be at least As low as the bottom of the footing, and it should be s!oped tor drainage. All roof and surface water drains must be kept sepazate from the foundation drain system. For the best long-term periormance, perforated PVC pipe is recommended for the footing drains. The excavation and site should be graded so that surface water is dirtcted off the site and away from the tops of slopes. Water should not be allowed to stand in any area where foundations, slabs, or pavements are to be constructed. Final site grading in areas adjacent to the building should slope away at least 2 percent, except where the area is paved. Water from roof, stormwater, and toundation drains should not be discharged onto the slope; it should be tightlined to a suitable outfall located away from the slope. If a storm drain is not available, the water may bc+ dischazged into a properly des�;ned intiltration or dispersion trench located at least 15 feot from the top of the slope. �eneral EanhworlLa�d�Si�4Ll�ill All building and pavement areas should be strippad of s��rface vegetation, topsoll, organic sofls, and other deleterious material. The stripped or removed materials shouid 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. Structural till is defr7ed as any fill placed under the building, behind permanent retalning or toundation walls, c: in other areas where the underlying soils need to support ioads. All structural fill should be placed in horizontal Iifts with a moisture content at, or near, the optimum moisture content. The optimum moisture content is that rioisture corrtent that results in the gr:atest compacted dry densily. The moisture content of fill soils is very important and must be closely controlled during the fillfng and compaction process. The allowable thickness of the fill lift will depend on the material type salected, the compac- tion equipment used, and the number of passes made to compact the lift. The loose lift thickness should not exceed 12 inches. We recommend testing ihe fill as it is placed. If the fill is not compacted to specifications, it can be recompacted before another lift is placed. This will eliminate the need to remove the fill to achieve the requ�red compaction. The following table presents recommended relative compactions for structural fill: GIiO'17iC11[1ONtiUI:PAN'IS.INC.