4719 BELVEDERE AVE 2016-01-01 MF Import

1ur�c 2A, 206 David and Judy King L&A Job No. 6AU76 Pnge 17 ITRAINAGE CONTROL F,zcavation for I3uilding Footprint Bxcavalion of building footprint, if encountcring groundwater, sho�ld liavc the bottom of e:xcavation slopcd and ditches excavated along the bases of the cut slopes to intcrcep► and ditect ground�vatcr into a sump pit from which water can bc putnped out of Uie excnvation into a neazby stomi scwcr. A layer of 2-inch crushcd rock should bc placed ovcr firtn undisturbed subgrude soils unJcr footings and on-gradc slabs, as rcquircd, to protect thc soils Gom distutbance by construction traf(ic. 7'his crusheJ rock base should be built to a few inches above groundwater Icvc:, but not Icss than 4 inches U�ick. The crush rock base should be compacted in 12-inch IiRs to n non-yiclding statc with a vibratorv m�ch.lnical compactor. Runoff ovcr Impen�ious Suri•rces Stonn runoff over impervious surfaccs, such as roofs and paved Jriveway, should be collectcd by undergroimd drain line systems connected to do�mspouts and by catch basins installecl in the dri��eway. Stormwatcr thus collectcd should bc tightlined to discharge into u storm scwer or u suitable stormwater disposal facility recommcnded in this report. Sufficient numbers of cleanouts should be providcJ to the underground drain line systems at strategic location to allow for periodicul dcaning of'thc drain lines. 13uilding Footing Drains A subdrain should bc installed, as rcquircJ, around thc perimetcr footings of the proposed new residence. The subdrain should consist of a 4-inch-minimum-diameter, perfotated, rigid, PVC, drain pipc, laid a fcw inches bclow the bottom of perimetcr footings. The trench nnd druin line should havc a su(licicnt gradicnt (0.5% minimwn) to g�cneratc 11ow by gravity. The drain line should lx embcdded in washcJ gravel complctely wrappeJ in non-woven tilter fabric to within aboid 12 i�uhes of finish grade. SuRicient numbers of cicanouts should be provided to the underground drain line systcm at strategic locations to allow for ncriodical cleaning of the drain LlU & ASSOCIATES, IN�.