Licence conditions for pollution studies and reduction program


  

Licence conditions for pollution studies and reduction programs

Summary
 
Licence number: 1699
Title: Offal Pit Improvement Works
Start date: 03 May 2021
 
Licence Condition
Background In December 2020 and January 2021, the licensee self-reported two incidents involving the discharge of untreated trade wastewater from its wastewater management system. The discharges were caused by a blockage in the wastewater management system primarily as a result of a build-up of feathers/quills in the drainage pipe. In response to the incidents, the licensee implemented clean up measures and a number of corrective actions to prevent a recurrence. On 28 April 2021, the licensee committed to complete additional engineering works in the Offal Pit area to further improve the management of wastewater and solids (feathers/quills) generated in this area. The aim of the works is to further reduce the volume of solids entering the wastewater system to reduce the risk of blockages and prevent uncontrolled discharges from the system. Program Unless otherwise agreed in writing by the EPA, the licensee must complete the following works by 30 November 2021: 1)  Cut out a pit in the offal pit floor for the macerating pump to be lowered. - COMPLETED This is designed to reduce the risk of blockage in the wastewater system by reducing the volume of wastewater and solids (feathers/quills) currently being directed to the existing offal pit floor drain. The solids load will be chopped up by the macerating pump and the mixture transferred to a separate treatment tank (the Dalton tank). The solids component is currently removed from the tank and disposed of offsite. The wastewater component is directed to the onsite treatment plant. 2)  Replace the recycled water tank. - COMPLETED This is designed to reduce the volume of wastewater flowing to the existing offal pit floor drain by redirecting the wastewater to the Dalton tank. The current recycled water tank is designed to allow wastewater to overflow to the offal pit floor drain. 3)  Installation of a screen on top of the recycled water tank. - COMPLETED This is designed to reduce the solids load (feathers/quills) falling into the recycled water tank. Unless otherwise agreed in writing by the EPA, the licensee must complete the following works by 28 February 2022: 4)  Install a feather shredder and redesign the conveyors in the offal pit This is designed to reduce the risk of blockage in the wastewater system by minimising the quantity of full-length feathers/quills on the offal pit floor and by reducing the solids loads to the new macerator pump installed in the offal pit floor.