Negotiated - Compiled Reference Document - RAL25 0011 (As Published)

LINDSAY CONSULTING PTY LTD
STRUCTURAL AND CIVIL ENGINEERS
ACN 079 744 808 ABN 61 478 386 385 GST REGISTERED

AS TRUSTEE FOR THE LINDSAY FAMILY TRUST




The effectiveness of the erosion and sediment control devices can be monitored by visual audits. All
ESC measures are to be inspected:
     •     at least daily (when work is occurring on site) or weekly (when work is not occurring on site);

     •     within 24 hours of expected rain; and

     •     within 18 hours of a rainfall event (i.e. an event of sufficient intensity and duration to mobilise
           sediment on site).

Drainage paths are to be inspected to ensure the sediment fences are not being bypassed as a result
of soil erosion.
Sediment laden runoff shall be prevented from entering neighbouring properties. This shall be achieved
by landscaping disturbed areas immediately and prior to a rainfall event.
The proposed development has scored a 14 on the IECA erosion hazard assessment with no trigger
score values exceeded (refer Appendix A for details). Further details of proposed on site erosion and
sediment control measures will be required at the detailed design phase of the development.


   4.2.3        Maintenance and Monitoring Requirements

Periodic maintenance and monitoring of stormwater devices proposed in this report is crucial to ensure
effective operation and design life.
Inspect field inlet grates, pits and underground pipes for blockage or damage at least 6 monthly or after
significant rainfall event. The filter baskets shall be inspected and maintained preferably by the
manufacturer to avoid damage to units and to ensure adequate cleaning and record keeping. For the
first 12 months routine inspections of filter baskets shall be carried out monthly with routine clean out
at alternate months. Results of the initial 12 months maintenance program shall be used to determine
future maintenance intervals. Refer manufactures maintenance and monitoring methodology for
specific details.

Maintenance of ESC measures must occur in accordance with Table 5.

Table 5 - 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
Noosa Council.




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