Acid Sulfate Management Plan · MCU16/0103

FPE Ref: 4956-161019-1.0




The transport, treatment, management and validation of ASS will be the responsibility of the contractor.

9.4 ASS MANAGEMENT REQUIREMENTS
Specific ASS management performance objectives, control measures and monitoring requirements have
been proposed based on the laboratory test findings. The managing contractor will be ultimately responsible
for the excavation, identification, treatment, validation, testing and management of all ASS material on the
site.

The aim of this section of the ASSMP is to provide appropriate design, management, monitoring and
corrective action measures required to minimise the potential impact on the environment caused by the
proposed works given that ASS types were noted to occur. Should environmental harm be caused or
threatened, the operator can demonstrate that all reasonable and practicable measures have been taken to
comply with relevant conditions of approval and the general environmental duty.

Appropriate regard to ASS is necessary by all operators on-site.


9.4.1 Proposed ASS and PASS Treatment/Liming Rates
A liming rate of 28.7mg/kg is required for all soil based on the laboratory pHF/SCR analysis results.

Management of both excavated and in-situ ASS are required under this section to ensure that the impacts
from disturbance of ASS are mitigated to comply with performance objectives. The most appropriate
mitigation strategy, given the nature of the proposed works, and the proximity to and sensitivity of the
receiving environment, is neutralisation.

An ASS treatment area including treatment pad, perimeter bunds and treatment basin is to be constructed
within the subject allotment. All excavated material from the site is to be taken to this area for treatment.

The Project Manager will be required to make arrangements for the designated treatment area in time prior
to commencement of works to arrange access and ensure the ASS treatment area is prepared in readiness
to accept ASS material.

9.4.2 Neutralisation of ASS Material
      All excavated surfaces and cut batters that extend below existing surface levels should be coated
        with fine agricultural lime (Aglime) at the rate of 5kg/m² and the lime coating should be checked
        and re-limed as necessary;
      An ASS treatment area is to be constructed within the subject allotment, consisting of treatment
        pad, bund and treatment basin as per Queensland Acid Sulfate Soil Technical Manual, Soil
        Management Guidelines (v3.8);
      The base of all treatment areas, where potential ASS are to be managed, shall be treated with a
        guard layer of 5kg/m2 of fine Aglime prior to the placement of any material. ASS shall also be
        placed on an impervious layer (e.g. 0.3 – 0.5 mm of compacted non-ASS clay material or




October 2016                          Acid Sulfate Soil Investigation Report                               19
                                            New Duplex, Noosaville