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.. <br /> Chapter 4 - Best Management 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 inlet sediment filter <br /> 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 /> cover and to cover the inlet opening completely. MOT No . 1 Coarse Aggregate <br /> shall be used . <br /> 3 . An overflow weir can be constructed of 2" x4" (5 x 10 cm) boards to lessen ponding <br /> from this practice . (See Plate 4 .08L) <br /> 4 . If the stone filter becomes clogged with sediment so that it no longer adequately <br /> r performs its function , the stone must be pulled away from the block, cleaned and <br /> replaced . <br /> Block and gravel curb inlet sediment filter <br /> 1 . 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 /> r 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 /> r abutting the spacer blocks . (See Plate 4.08m) <br /> 4 . Wire mesh shall be placed over the outside vertical face (webbing) of the concrete <br /> r blocks to prevent stone from being washed through the holes in the blocks. <br /> Hardware cloth with 112 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 /> r 4-45 <br /> r <br />