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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 />