Development Application Part 2 - Environmental & Stormwater Management Plans · OPW11/0335

EP-SECP-05: Maintaining ground cover
1. Objectives/Targets       u   To avoid erosion of soil from the building site.
2. Management Strategy          1) Minimise exposure of unstable soil in stockpiles and disturbed ground.
3. Tasks/Actions                1) Maintain existing grass cover as much as possible:
                                2) Cover disturbed ground under erosion blanket, secured with pegs and with the
                                edge buried below the soil surface.
                                3) Reseed disturbed soils that will be left bare, using hydromulch or equivalent.
                                Irrigate reseeded area daily for four weeks to establish the grass surface.
                                4) Lay turf in areas where concentrated flow is expected (e.g. at the overflow of
                                sediment fences).
4. Performance Indicators       1) Lack of ground cover kept to a minimum,
                                2) Ground covered with remnant grass (undisturbed state), erosion blankets (short
                                term disturbance) or reseeded grass (longer term after disturbance): and
                                3) Lack of surface erosion
5. Monitoring                   1) Temporarily disturbed ground is covered with erosion mats:
                                2) Reseeding and irrigation of bare ground is occurring:
                                3) 100% vegetation cover 4 weeks after establishment:
                                4) Rills are not present on the building site:
                                5) Suspended solids in water exiting the site are not excessively higher than water
                                entering the site.
6. Frequency/Deadlines          1) Cover with erosion mats: daily:
                                2) Cover with grass daily,
                                3) Reseeding and irrigation schedule is being maintained daily:
                                4) Rills on the building site after stormwater events, and
                                5) Suspended solids in water entering and exiting the site: during stormwater
                                events.
7. Responsibilities             Building contractor.
8. Reporting and Review         Exception reporting to the site manager and senior management.
9. Contingency                  When water is flowing over unstable ground:


                                1) Use sandbags to divert flow from upstream away from unstable ground onto
                                stable ground:
                                3) Cover the point of failure using erosion mats:
                                4) Collect water quality samples at inflow and outflow points (section 11):
                                5) Report situation to site manager:
                                6) Implement corrective actions.
10. Corrective actions          1) Building contractor to reinforce the need for managing off site movement of
                                disturbed soil because of the high environmental values associated with Noosa
                                National Park:
                                2) Ensure that erosion mats are intact and properly installed:
                                3) Ensure that re-seeding and irrigation is occurring. Install additional erosion mats,
                                grass cover, or turf if necessary