Materials
* Compost fill: comply with the requirements of AS4454.
* Fibre rolls: minimum 200mm diameter synthetic or biodegradable tubes.
* Stakes: minimum 20 by 20mm timber.

Installation
1. Refer to approved plans for location and installation details. If there are questions or problems with the location, dimensions or method of installation contact the engineer or responsible on-site officer for assistance.
2. When placed across non-vegetated or newly seeded slopes, the filter socks must be placed along the contour.
3. If placed on open or loose soil, ensure the filter socks are trenched 50 to 100mm into the ground.
4. Ensure the outer most ends of each filter sock or continuous row of filter socks are turned up the slope to allow water to adequately pond up-slope of the socks, and to minimise flow bypassing.
5. When placed across the invert of minor drains and table drains:
(i) space the socks down the drain such that the crest of the downstream sock is level with the channel invert at the immediate upstream sock (if any);
(ii) each sock must extend up the channel banks such that the crest of the sock at its lowest point is lower than ground level at either end of the sock.
6. Ensure the anchoring stakes are driven into the end of each sock and along the length of each sock at a spacing not exceeding 1.2m or six times the sock diameter (whichever is the lesser). A maximum stake spacing of 0.3m applies when used to form check dams.
7. Adjoining socks must be overlapped at least 450mm, not abutted.

Maintenance
1. Inspect all filter socks prior to forecast rain, daily during extended periods of rainfall, after significant runoff producing storms or otherwise at weekly intervals.
2. Repair or replace damaged filter socks.
3. Remove collected sediment and dispose of in a suitable manner that will not cause an erosion or pollution hazard.

Removal
1. All excessive sediment trapped by the filter socks must be removed from the drain or slope if such sediment is likely to be washed away by expected flows. 
2. Dispose of collected sediment in a suitable manner that will not cause an erosion or pollution hazard.
3. All synthetic (plastic) mesh or other non readily biodegradable material must be removed from the site once the slope or drain is stabilised, or the socks have deteriorated to a point where they are no longer providing their intended drainage or sediment control function.