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Florida Erosion and Sediment Control Inspector's Manual <br /> 1 . Place the device over the inlet. If the inlet has a grate, the device shall be secured to <br /> the grate by means of a long toggle bolt. If the grate is not present, the device shall be <br /> bolted directly to the concrete . <br /> 2 . Sediments shall be removed when they have accumulated to within one foot (30 cm ) <br /> of the top of the device. The filter fabric elements shall be cleaned or replaced at that <br /> ., time . <br /> NOTE: This segment does not constitute a product endorsement . <br /> Gravel curb inlet sediment filter <br />.N. 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 . FDOT No , 1 Coarse Aggregate <br /> shall be used . <br /> r. 3 . An overflow weir can be constructed of 2" x 4" (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 /> 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 /> 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 /> 4 . Wire mesh shall be placed over the outside vertical face (webbing ) of the concrete <br /> blocks to prevent stone from being washed through the holes in the blocks . Hardware <br /> 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 /> 446 <br />