6605 HARDESON RD BASE FILE 2016-01-01 MF Import

I�tracorp E-3592-726 September 21, 1998 Page 7 In no case should excavation slopes be greater than the Iimits specified in local, state and Federal safety reguiations. Based on the information obtained from our field exploration, the site soiis expected to be encountered in excavations would be classified as Type C by OSHA. As such, temporary cuts greater than four feet in height should be sloped at an inclination no steeper than 1.5H:1 V(Horizontal:Verticaq. If slopes of this inclination or flatter cannot be constructed, temporary shoring may be necessary. This shoring will help protect against slope or excavation collapse, and will provide protectien to workers in the excavation. If temporary shoring is required, we will be available to provide shoring design criteria, if requested. ,$ue Drainsaa Groundwater seepage was not encountered in the test pit excavatfons, therefore, it doas not appear groundwater will present construction related issues wnile excavating for foundations or utilities. However, if groundwater seepage is encountered during construction, the bottom of the excavation shouid 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. Depending on the magnitude of such seepage, it may also be necessary to interconnect the sump pits by a system of connector trenches. During construction, the site must be graded such that surface water is directed off the site. Water must not be allowed to stand in any area where buildings, slabs or pavements are to be constructed. Loose surfaces should be sealed at night by compacting the surface to reduce the potential for moisture infiltration into the soits. Final site grades must allow for drainage away from the building foundations and tops of the steep desce�ding slopes. The ground should be sloped at a gradient of three percent for a distance of at least ten feet away from the building, except in paved areas, which can be sloped at a gradient of one percent. Footing drains shouid be instailed around the building perimeter, 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 shoutd roof downspout drain lines be connected tr, the footing drain system. All roof dcwnspouts must be separately tightlined to discharge. Water should not be discharged adjacent to the top of the descending slopes. Cleanouts should be installed et strategic locations to allow for periodic maintenance of the footing drain and downspout tightline systems. �ili Trench Backfill Based on the soil conditions encountered, tha soils expected to be exposed by utility excavations should provide adequate suppoR fur utilities. Erth Con�uk�b. M�c.