5700 23RD DR W 2016-01-01 MF Import

1 I18.0 FL.00R �j�gT iSlab-on-grade floors may be constructed on [he medium dense to very dease or hard natura► sed'unents, or on strucdual fill placed over these materials. Areas of the slab subgrade that are � disturbed (loosened) during construction should be compacted to a non-yielding condition prior to placing the pea gravel as described below. ( Floor slabs to be used in areas where moisture inuusion through the slab is to be controlled should be consuucted atop a capillary break materia! and vapor barrier. The capillary break should consist of a minunum thickness of 4 inches of washed pea gravel with a moisture barrier on top Iof the capillary break. In addidon, as per American Concrete Institute recommendauons, a minimum of 2 inches of clean sand should be placed over the moisnue barrier to protect the integrity of the moisture barrier during concrete placement and to aid in the curing of the co�rete. j If ground wxter seepage is rncouncered within the slab excavation, a sub-slab drainage sysum may � be requ'ued and should be determined by AESI in the field at the time of construction. � 19.0 DRAi1vA ON ID . ATTO� IMany of the sediments encountered in our exploradons at the site were silty anci therefore are extremely moisture-sensidve. These soils, when wet and disnubed, will become s�g�p�� � erosion potential. Therefore, prior W and during siu work, the contractor should Ue prepared co provide drainage and subgrade protection as necessary. � All perimeter footing walls should be provided with a drain at the base of the footing elevadon. Drains should consist of rigid, perforaud, PVC pipe surrounded by washed pea gravel. The level of the perforations in the pipe should be set approximately 2 i�hes below the botWm of the Ifootings and the drains should be constructed with sufficient gradient to allow gravity discharge away from the building. Roof and surface runoff should not discharge into the foodng drain system but should be handled by a separate, rigid, dghtline drain, In planning� �xterior grades Iadjacent to walls should be sloped downward away from the stiucuue to achieve surface drainage, At no time should water be dimted towazd or over steeply sloping areas. ,4I1 storm w,ater should Ibe d'uected to the storm water detention ponds. � 20.0 STORM WATFR D TFN17nN PnAm �`nt�Temr� •T--�-.� � Recomme�arions for construction of storm waur deuntion ponds were provided in out leaer entided "Storm Water Detention Pond Considerations", dated Jauuary 9, 1998. J C �� 1