Development Application part 7 of 10 Stormwater Management Report - MCU13/0092

Plate 26 Slightly clogged filter bag, indicated     Plate 27 A clean used filter bag
by the brown stain on in the centre of the
bag




3.5.2 Damaged Filters

Damaged filters can often be repaired, provided the damage is small. Small tears in the fabric may occur do to
several reasons, however the overall strength & structure of the nylon fabric typically prevents small tears

becoming much larger. Although the bag is unlikely to tear further care must be used when clean torn bags as
not to spill the collected material into the pit.



Small tears maybe repaired by either sewing the tear back together, with additional fabric to increase the
strength of the stitching, or by sewing a patch of the filter material onto the filter bag. The filter bags may
need to be replaced if large tears are present, as the filter bag is no longer able to function as intended.




3.6 Disposal of Material

All gully pit wastes from the site are to be taken off site and disposed of at a transfer station or similar

approved   disposal site. Stormwater Sediments can contain Lead, Copper, Zinc, Mercury, hydrocarbons and
PCBs, which are harmful to both humans and the receiving environment. Appropriate sampling and laboratory
analysis may be required to classify the material as suitable for reuse, or disposal under appropriate local
guidelines.




@2011 Stormwater360