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2.1 GENERAL A. Polyacrylamide:As required in Paragraph 1.3.C, place polyacrylamide(PAM) on bare ground to reduce the potential for erosion and cover it with hay,jute, or mulch. PAM may also be used in water bodies to remove turbidity. In all cases, use the anionic form of polyacrylamide that does not stick to fish gills. For PAM information and its proper application, a contact is Applied Polymer Systems, Inc., (678) 494-5998, www.siltstop.com. B. Staked Silt Fences: 1. General: Use silt fences to control runoff from the construction site where the soil has been disturbed. 2. Installation: Install per the manufacture's recommendations and as specified herein. In general, install the silt fence in a manner that allows it to stop the water long enough for the sediment to settle while the water passes through the silt fence fabric. All supporting posts shall be on the down-slope side of the fencing. Place the bottom of the fabric 6-inches minimum, under compacted soil to prevent the flow of sediment underneath the fence. Place silt fences away from the toe of slopes. Otherwise, install in accordance with FDOT Index No. 102. 3. Product: All material shall be new and unused. Use FDOT Types III through IV j silt fences where large sediment loads are anticipated, where slopes are 1:2 (vertical: horizontal)or steeper, or as directed by the ENGINEER; otherwise use FDOT Type II silt fence. C. Turbidity Barriers: 1. General: Use turbidity barriers to control sediment contamination of rivers, lakes, ponds, canals, etc. 2. Installation: Install per the manufacturer's recommendations and per FDOT Index No. 103 unless directed otherwise by the ENGINEER. 3. Product: All material shall be new and unused. The turbidity barrier shall be a pervious barrier and the fabric color shall be yellow. Use staked turbidity barriers in water less than one-foot deep. Use floating turbidity barriers in water I one-foot or deeper. i I D. Sedimentation Control From Dewatering or Pumping Operations Using Filter Bags: 1. Filter bags shall be manufactured using a polypropylene non-woven geotextile and sewn by a double-needle machine, using a high strength nylon thread. The bag shall have a fill spout large enough to accommodate a 4-inch pump discharge hose. Straps shall be attached to the bag to secure the hose and prevent pumped water from escaping without being filtered. 2. Installation: Install in accordance with the manufacturer's specifications. Use as many filter bags as required, at no additional cost to the OWNER. Legally dispose of the bags offsite, at no cost to the OWNER. If the bags are placed on aggregate to facilitate filtration efficiency, do not use limerock aggregate—use j non-calcareous rock. 3. Product: The filter bag shall be supplied with lifting straps. j I 01025-16 Technical Specifications F:\Public Works\ENGINEERING DIVISION PROJECTS\1123 43rd Ave Sidewalk Improvements 26th St.to Airport Or West\Admim\bid documents\Master Contract Documents\Technical Specifications.doc I I