Guidelines for constructing and maintaining aquaculture ...
Guidelines for constructing and maintaining aquaculture ...
Guidelines for constructing and maintaining aquaculture ...
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9. Corrective actions<br />
Industry experience has shown that investigating allegations of unsatisfactory per<strong>for</strong>mance of<br />
containment structures <strong>and</strong> correcting these problems can be expensive. Costs may include<br />
engaging technical <strong>and</strong> legal professionals <strong>and</strong> undertaking detailed analysis. Significant cost<br />
savings can be made by following the critical steps in these guidelines.<br />
appropriate site selection<br />
appropriate design including the provision of adequate buffers<br />
construction to appropriate st<strong>and</strong>ards<br />
certification of construction<br />
baseline <strong>and</strong> routine monitoring<br />
If per<strong>for</strong>mance indicators are not complied with, it is strongly recommended that a suitably qualified<br />
person investigates the reason <strong>for</strong> the non-compliance <strong>and</strong> determines appropriate corrective<br />
actions. It is also strongly recommended that the relevant authorities are notified of potential<br />
problems with the containment structures, <strong>and</strong> are consulted about further investigations, <strong>and</strong><br />
appropriate corrective actions.<br />
Corrective actions will generally proceed through the following stages:<br />
1. Verifying non-compliance through data analysis, additional monitoring <strong>and</strong> detailed site<br />
investigations including detailed groundwater monitoring.<br />
2. Assessing, in consultation with the administering authorities, the potential risk to sensitive<br />
environments, groundwater or adjacent l<strong>and</strong> uses from non-compliance with per<strong>for</strong>mance<br />
indicators. This may include a cost benefit analysis to assess the potential cost of remediation of<br />
environmental harm against the cost of remedial actions.<br />
3. Identifying probable <strong>and</strong>/or critical causes <strong>for</strong> non-compliance <strong>and</strong> possible solutions e.g.<br />
laboratory testing of samples or in situ testing using groundwater tracers, modelling etc. to<br />
evaluate permeability.<br />
4. Implementing corrective actions – options may be arbitrarily defined as engineering or<br />
management solutions. Examples of possible solutions are summarised below:<br />
Management solutions<br />
Modifying the rate at which ponds are filled<br />
Relief wells<br />
Interception bores/ trenches<br />
Infiltration trenches<br />
Recharge bores<br />
Engineering solutions:<br />
Repairing low permeability lining<br />
Retrofitting of low permeability lining<br />
Modifying the farm design e.g. decommissioning ponds or relocating supply <strong>and</strong>/or discharge<br />
channels<br />
Further in<strong>for</strong>mation on engineering <strong>and</strong> management solutions is provided in Appendix 6.<br />
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