Acid Sulfate Soils Management Plan · OPW19/0205

PROCEDURE A
Management of Acid Sulfate Soils

movements must be kept by the Site Supervisor or their delegated representative with respect to
volumes, origin, material type and destination.

Due care is to be taken when transporting saturated/supersaturated soils and sediments (e.g. wet,
silty/sandy material).

Any ASS materials that cannot be transported in the time frame detailed above must be stockpiled on
site on a suitably prepared storage area and the following additional management measures should be
followed:

     Stockpiles are to be contained by bunds with stormwater runoff directed to a collection sump.
      Bunds are to be constructed from low permeability materials that are not ASS.

     A guard layer of neutralising agent (minimum 5 kg/m2) should be spread across the soil surface
      prior to placement of the stockpile. The rate of neutralising agent applied should be based on 0.3
      times the average total potential plus existing acidity for every 1 m height of soil in the stockpile.

     The surface area of the stockpile is to be minimised by shaping and possibly capping or covering
      to prevent moisture loss and rainfall entry.

A5.        Responsibilities
During stockpiling, handling and transport the following levels of responsibility shall exist:

     The Site Supervisor or their delegated representative is responsible for ensuring that the
      requirements of the ASS MP are communicated to site staff.

     The Site Supervisor or their delegated representative is responsible for ensuring the
      management strategies and procedures prescribed in the ASS MP are implemented at the site.

     All other site personnel are responsible for implementing and undertaking the management
      strategies and procedures prescribed in the ASS MP, as applicable to their work activities.

A6.       MONITORING AND REPORTING
Records shall be kept by the Site Supervisor or their delegated representative to verify volumes of
soils excavated and transported for treatment.

In addition, specific details regarding volumes, origin, material type and destination, in conjunction
with a photographic record of site development works associated with soil movements, should be
maintained by the Site Supervisor or their delegated representative.

The Site Supervisor or their delegated representative shall be responsible for ensuring that the
excavated ASS materials are managed in accordance with details provided above.




April 2019
J000799-003-R-Rev0 – Procedure A                     2/2