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« <br />Chapter 4: -Best -Nana .emerit: Practices for Erosion.and Sediment Control, <br />Prefabricated drop inlet external filter (Suntree isles Grate Inlet Protector) <br />1. Place the device over the inlet. If the inlet has a grate, the device shall be secured <br />to the grate by means of a long toggle bolt. If the grate is not present, the device <br />shall be bolted directly to the -concrete. <br />« 2. Sediments shall be removed when they have accumulated to within one foot (30 <br />cm) of the top of the device. The filter fabric elements shall be cleaned or replaced <br />« at that time. <br />NOTE: This segment does not constitute a product endorsement. <br />Gravel curb iniet sediment filter <br />s 1. Hardware cloth or comparable wire mesh with 1/2 inch (13 mm) openings shall be <br />placed over the curb inlet opening so that at least.12 inches (30 cm) of wire extends <br />across the top of the inlet. cover and at least 12 Inches (30 cm) of wire extends <br />« across the concrete gutter from the inlet opening. (See.Plate 4.08k) <br />2, Stone shall be piled against the wire so as to anchor it against the gutter and inlet <br />it cover and to cover the inlet opening completely. FDOT No. 1 Coarse Aggregate <br />shall be used. <br />4W 3. An overflow weir can be constructed of 2" x 4" (5x 10 cm) boards to lessen ponding <br />from this practice. (See Plate 4.08>_) <br />« 4. If the stone filter becomes clogged with sediment so that it no longer adequately <br />performs its function, the stone must be pulled away from the block, cleaned and <br />replaced. <br />Block and oravel curb inlet sediment filter <br />Two concrete blocks shall be placed on their sides abutting the curb at either side <br />of the inlet opening. <br />« 2. A 2" x 4" (5 x 10 cm) board shall be cut and placed through the outer holes of each <br />spacer block to help keep the front blocks in place. <br />3. Concrete blocks shall be placed on their sides across the front of the inlet and <br />abutting the spacer blocks. (See Plate 4.08m) <br />r 4. Wire mesh shalt be placed over the outside vertical face (webbing) of the concrete <br />blocks to preventstone from being washed through the holes in the blocks. <br />Hardware cloth with 1/2 inch (13 mm) openings shall be used. <br />5. FDOT No. 1 Coarse Aggregate shall be piled against the wire to the top of the <br />barrier. <br />4-45 <br />« <br />