Appendix A of the CTMP details the provides the chemical analysis and test report which confirms the efficacy of chemical treatment of typical sites' soils, based on the testing methodology described in the CTMP. 3.6. Silt Fences and Super Silt Fences Silt fences or Super Silt Fences may be used to capture runoff from small areas that cannot actively drain to a SRP. Silt fences will be installed below the footprint of all SRPs to capture any runoff during the construction phase of these devices. Once the device is constructed then the silt fence will need to be returned up either side of the emergency spillway. 3.7. Monitoring and Maintenance All ESC measures will be maintained in accordance with TR2009/02 throughout the works until the site is stabilised against erosion. All ESC measures and methodologies will be monitored during the works in accordance with the Erosion and Sediment Control Monitoring Plan (Appendix B of the Erosion and Sediment Control Assessment Report). General monitoring of the ESC measures will be undertaken at least weekly, and before and immediately after rain events as well as during heavy rainfall events. Any required maintenance or improvements to control measures will be undertaken immediately. Sediment deposits and bulges against the silt fences will be removed when sediment accumulation reaches 20% of the fabric height. The SRPs will be cleaned out before accumulated sediment volume reaches 20% of the total volume. Forebays will be cleaned out if there is any evidence of sediment deposition. 3.8. Stabilisation Progressive stabilisation will be undertaken throughout the earthwork operations. Both temporary and permanent stabilisation measures will be employed on site. Common stabilisation measures include spreading of aggregate, grassing (with a full cover of grass), applying mulch and the use of geotextiles. Once the catchment area for a particular ESC device is stabilised in accordance with TR2009/02, or the runoff directed to a different water management system (i.e. the Water Treatment Plant) then the ESC monitoring and maintenance will cease and the ESC device could be decommissioned. 3.9. Dust Management Dust will be managed in accordance with the Air Quality Management Plan. 3.10. General Prior to bulk earthworks commencing, as-builts for the ESCs will be provided to the Waikato Regional Council. The as-built certification will confirm that the controls have been constructed in accordance with the approved SSESCP. This SSESCP is intended to be a live document and if the earthworks methodologies or ESC measures for the anticipated work changes then an update / review of the SSESCP drawings will be made before the earthworks commence. Any changes to the SSESCP will be confirmed in writing and provided to the Council for certification, prior to the implantation of any changes proposed.
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