Appendix D- Stormwater Management Plan · MCU23/0078

Editor’s Note—Planning scheme policy for Assessment of Natural Hazards provides advice and guidance for achieving certain
outcomes of this code, including guidance for the preparation of an ASS investigation report and management plan.

8.2.1.2          Purpose and overall outcome
(1)   The purpose of the Acid Sulfate Soils overlay code is to ensure that the generation or release of acid and metal contaminants from
      acid sulfate soils (ASS) does not have adverse effects on the natural environment, built environment, infrastructure or human
      health.
(2)   The overall outcome of the Acid Sulfate Soils overlay code is that development ensures that the release of acid and associated
      metal contaminants into the environment is avoided by either:
       (a)   not disturbing ASS when excavating or otherwise removing soil or sediment, extracting groundwater or filling land; or
       (b)   treating and, if required, undertaking ongoing management of any disturbed ASS and drainage waters.

Table 8.2.1.3 ­ Criteria for assessable development
Performance outcomes                                                Acceptable outcomes

Avoidance and management of ASS
PO1                                                                 AO1.1
Development:                                                        The disturbance of ASS is avoided by:
(a)   does not disturb ASS; or                                      (a)   undertaking an ASS investigation and soil analysis
(b)   is managed to avoid or minimise the release of acid and             according to the National Acid Sulfate Soils Guidance;
      metal contaminants, where disturbance of ASS is               (b)   not excavating or otherwise removing soil or sediment
      unavoidable.                                                        containing ASS;
                                                                    (c)   not permanently or temporarily extracting groundwater that
                                                                          results in the aeration of previously saturated ASS; and
                                                                    (d)   not undertaking filling on land at or below 5 metres AHD
                                                                          that results in:­
                                                                          (i)    actual ASS being moved below the water table; or
                                                                          (ii)   previously saturated ASS being aerated.


                                                                    Editor's note—National Sampling and Identification Methods
                                                                    Guidelines is a reference to:
                                                                    (a)   National Acid Sulfate Soils Guidance: National acid sulfate
                                                                          soils sampling and identification methods manual,
                                                                          Department of Agriculture and Water Resources, Canberra
                                                                          (Sullivan et al, 2018); and
                                                                    (b)   National Acid Sulfate Soils Guidance: National Acid Sulfate
                                                                          Soils Identification and Laboratory Methods Manual,
                                                                          Department of Agriculture and Water Resources, Canberra;
                                                                          and
                                                                    (c)   the Australian Standard 4969.

                                                                    OR

                                                                    AO1.2
                                                                    The disturbance of ASS avoids the release of acid and metal
                                                                    contaminants by:­
                                                                    (a)   undertaking an ASS investigation conforming to
                                                                          the National Acid Sulfate Soils Guidance;
                                                                    (b)   neutralising existing acidity and preventing the generation
                                                                          of acid and metal contaminants using strategies
                                                                          documented in the Soil Management Guidelines; and
                                                                    (c)   preventing the release of surface or groundwater flows
                                                                          containing acid and metal contaminants into the


                                             NOOSA PLAN 2020 ­ AMENDED AT 25 SEPTEMBER 2020                                    Page 2 of 44