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Addendum #1 <br />may also be used in water bodies to remove turbidity. In all cases, use the anionic <br />form of polyacrylamide that does not stick to fish gills. For PAM information and its <br />proper application, a contact is Applied Polymer Systems, Inc., (678) 494-5998, <br />www.siltstop.com. <br />B. Staked Silt Fences: <br />1. General: Use silt fences to control runoff from the construction site where the <br />soil has been disturbed. <br />2. Installation: Install per the manufacture's recommendations and as specified <br />herein. In general, install the silt fence in a manner that allows it to stop the <br />water long enough for the sediment to settle while the water passes through <br />the silt fence fabric. All supporting posts shall be on the down-slope side of <br />the fencing. Place the bottom of the fabric 6 -inches minimum, under <br />compacted soil to prevent the flow of sediment underneath the fence. Place <br />silt fences away from the toe of slopes. Otherwise, work shall conform to <br />Section 104 of the Florida Department of Transportation Standard <br />Specifications for Road and Bridge Construction. <br />3. Product: All material shall be new and unused. Use FDOT Types III through IV <br />silt fences where large sediment loads are anticipated, where slopes are 1:2 <br />(vertical: horizontal) or steeper, or as directed by the ENGINEER; otherwise <br />use FDOT Type II silt fence. <br />C. Turbidity Barriers: <br />1. General: Use turbidity barriers to control sediment contamination of <br />rivers, lakes, ponds, canals, etc. <br />2. Installation: Install per the manufacturer's recommendations and per Section <br />104 of the Florida Department of Transportation Standard Specifications for <br />Road and Bridge Construction unless directed otherwise by the ENGINEER. <br />3. Product: All material shall be new and unused. The turbidity barrier shall be a <br />pervious barrier and the fabric color shall be yellow. Use staked turbidity <br />barriers in water less than one -foot deep. Use floating turbidity barriers in <br />water one -foot or deeper. <br />D. Sedimentation Control From Dewatering or Pumping Operations Using Filter Bags: <br />1. Filter bags shall be manufactured using a polypropylene non -woven geotextile <br />and sewn by a double -needle machine, using a high strength nylon thread. <br />The bag shall have a fill spout large enough to accommodate a 4 -inch pump <br />discharge hose. Straps shall be attached to the bag to secure the hose and <br />prevent pumped water from escaping without being filtered. <br />2. Installation: Install in accordance with the manufacturer's specifications. Use <br />as many filter bags as required, at no additional cost to the OWNER. Legally <br />dispose of the bags offsite, at no cost to the OWNER. If the bags are placed <br />on aggregate to facilitate filtration efficiency, do not use limerock aggregate — <br />use non -calcareous rock. <br />3. Product: The filter bag shall be supplied with lifting straps. <br />a. "DIRTBAG 53 or 55 as applicable," supplied by ACF Environmental, <br />Inc. (1-800-448-3636). <br />01025-8 Technical Specifications <br />F:\Public Works\ENGINEERING DIVISION PROJECTS\1414-49th St_58th Ave to 31st Ave\1-Admin\Bids\Bid <br />Documents\Adendums\Technical Specifications uPDATED 5-25-2017.doc <br />