Stormwater Management Report · MCU19/0008

Table 8 - ESC maintenance requirements.

               ESC Measure                      Maintenance Trigger              Timeframe for Completion
                                                                                      of Maintenance

 Sediment basins                         When settled sediment exceeds          Within 7 days of the
                                         the volume of the sediment             inspection.
                                         storage zone

 Other ESC measures                      The capacity of ESC measures           By the end of the day.
                                         falls below 75%.

Sediment accumulation on ESC devices is to be removed and disposed of to the satisfaction of NSC.

5     CO NCL USI O N


This SWMP outlines how stormwater runoff from the site will be managed in order to not adversely
impact the receiving environment.

Stormwater runoff from developed areas of the site shall be directed to a detention & infiltration tank
with approximately 7m 3 detention capacity at the rear of the site. Runoff from the tank shall discharge
via either infiltration or shall surcharge and discharge east to Sunshine Beach as per existing conditions.
The detention tank configuration shall ensure the impact of stormwater runoff on the adjoining sand
dunes is mitigated and maintained below pre-development levels. Final layout & configuration of the
tank shall be confirmed at the detailed design phase. Is it noted that this discharge strategy was
approved for the adjoining development at 24 Arakoon Crescent.
Stormwater treatment could be managed on site by first flush diverters directing runoff for irrigation of
landscaped areas and/or the installation of field inlet pit inserts. Based on the scale of the proposed
development, and typical pollutants produced, these measures are considered adequate.
By implementing the proposed stormwater management system, and providing adequate maintenance,
the downstream environment and neighbouring properties will not experience any adverse deterioration
of water quality as a result of the proposed development.




4 April 2019                            Stormwater Management Report                                     14
S18-030                                    22 Arakoon Crescent,