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��. � � � <br /> � curing of the concrote lloor slab and protect the vapor barrier. The ACI no longer recommends sand for <br /> � the protection layer. If moisture control within the building is critical, we recommend an inspection of � <br /> the wndensation barrier to verify that all openings have been properly sealed. <br /> � 3.6 DRAINAG� <br /> �1 To collect water that may accumulate near the proposed additions,we recommend the installation <br /> J <br /> of a perimeter footing drain system. The drainage system should consist of a 4-inch diameter,perforated, <br /> � Schedule 40 PVC pipe, placed in an envel�pe of 5/8-inch nominal drain grzvel. The drxin gravel should <br /> be surrounded by a nonwoven geotextile, such as a Mirafi 140N, Supac 4NP, or equivalent. The new <br /> � footing drain should connect to the existing foundation drainage system. Prior to attaching the new <br /> footing drain to the existing footir.g drain, we recommend that the contractor verify that the existing <br /> -� system functions properly. Rooi downspouts shoulG not be conr.^.cted to the footing drain, but dischazge <br /> water directly into the existing storm water system or other appropriate outlet by means of a tightline-type <br /> � system. To reduce the possibility of water ponding and infiltrating into the subsurface near the <br /> foundations, exterior grades should be sloped to promote surface drainage away from the building. <br /> .1 <br /> I <br /> ! <br /> . � <br /> � <br /> � <br /> l <br /> _j <br /> J <br /> � <br /> J5/2B/0211PROlECTfO1�q050101EASTMpHT_RPTDOC 3-Q �MIpAU/,$SpL`UTES (VJ� <br />/ <br />