Licence conditions for pollution studies and reduction program


  

Licence conditions for pollution studies and reduction programs

Summary
 
Licence number: 372
Title: Pollution Study: Odour Risk Reduction Study at Liverpool, Glenfield and Fairfield STPs and surrounding sewer network
Start date: 30 Apr 2021
 
Licence Condition
The objective of this Pollution Study is to require the licensee to undertake a detailed investigation to identify the odour risks from the Liverpool, Glenfield and Fairfield sewage treatment plants and surrounding sewer reticulation network (the Study Area) and determine reasonable and feasible measures to reduce these risks.
By 30 November 2021 the licensee must undertake all works and actions necessary to complete an Odour Risk Reduction Study. The Odour Risk Reduction Study must investigate odour risks in the Study Area and identify options for reducing these risks. The Odour Risk Reduction Study must identify options using (but not limited to) analysis of the following: Existing odour inventories, known odour sources and their significance; Incidents and events (including desilting of SWOOS1 and SWOOS2) in the Study Area within the last 3 years which had the potential to cause elevated odours; Odour complaints data (including odour enquiries and feedback) for the last 3 years and any correlations, trends or relationships to operational conditions including weather conditions, flow rates, effluent characteristics and composition, and system maintenance works; Odour risk reduction recommendations made to the licensee regarding the Premises within the past 3 years; The designed capacity (including throughput and treatment capability) of the Liverpool, Glenfield and Fairfield sewage treatment plants compared with current flows and growth numbers and any impact on odours generated; Current industry best practice for the monitoring and investigation of sewage odours and their applicability to the Study Area; Current industry best practice technology for the control of odours at sewage treatment plants and their applicability to the Study Area; Current industry best practice monitoring and maintenance of odour control at sewage treatment plants and their applicability to the Study Area; Alternative equipment, procedures, engineering solutions, preventative maintenance measures and siting of equipment; and Any other Odour Risk Reduction Options or analysis deemed relevant by the licensee and/or the appropriately qualified and independent consultant.
By 20 April 2021 the licensee must provide to the EPA a draft project plan that meets the objectives as stated in U11.1 and clearly outlines the project scope, tasks, methodology and timeframes. The project plan must include details of the proposed investigations, works and activities required to conduct the Odour Risk Reduction Study as outlined in U11.2.
The licensee must finalise the project plan required by U11.2 by addressing all written comments provided by the EPA on the project plan, then resubmitting it to the EPA within four weeks of receiving such comments.
By 18 June 2021 the licensee must engage an appropriately qualified and independent person(s) to provide input for key elements of the study as detailed in the project plan.
By 30 November 2021 the licensee must undertake the investigation, works and activities included in the most recent version of the project plan required by Conditions U11.2 and U11.4.
By 20 December 2021 the licensee must submit to the EPA a report that, at minimum, fulfils the requirements of Conditions U11.1 to U11.6. The report must analyse the information below to identify risk reduction options: Existing odour inventories, known odour sources and their significance; A list of incidents and events in the Study Area within the last 3 years which had the potential to cause elevated odours. Include start and finish dates (where relevant) and a brief description; A list of odour complaints data (including odour enquiries/feedback) for the last three years; Graphical presentation and explanation of odour complaints data (including odour enquiries and feedback) and any correlations, trends or relationships to operational conditions including monitoring data, weather conditions, flow rates, effluent characteristics and composition, and system maintenance works; A list of all odour risk reduction recommendations made to the licensee regarding the Premises within the past 3 years and identify whether these were undertaken; Identification and comparison of the designed capacity (including throughput and treatment capability) of the Liverpool, Glenfield and Fairfield sewage treatment plants compared with current flows and growth numbers and any impact on odours generated; Current industry best practice for the monitoring and investigation of sewage odours and their applicability to the Study Area; Current industry best practice technology for the control of odours at sewage treatment plants and their applicability to the Study Area; Current industry best practice monitoring and maintenance of odour controls at sewage treatment plants and their applicability to the Study Area; Identification of alternative equipment, procedures, engineering solutions, preventative maintenance measures and siting of equipment; and Any other Odour Risk Reduction Options or analysis deemed relevant by the integrated project team.
The licensee must assess all odour risk reduction options for any options identified for reducing odour risks in the Study Area as identified in the Odour Risk Reduction Study in Condition U11.2. The Options assessment must, at a minimum: Consider the options identified in the Odour Risk Reduction Study; Detail the range of feasible options, including both long-term and short-term options; Recommend the preferred option(s) that will help mitigate the risk of offensive odours from the Study Area; Provide adequate justification for the preferred option(s) such as by a cost/predicted benefit analysis; and Provide a timeframe for implementation of the preferred option(s).
By 30 March 2022 the licensee must submit to the EPA a report on the assessment completed to meet Condition U11.8.
A Pollution Reduction Program may be included on the licence for implementation of works based on the outcomes of this Pollution Study.
The EPA does not expect the licensee to delay the implementation of odour risk reduction options prior to the finalisation of this Pollution Study and any reports required. These risk reduction options can be implemented at any time.
The Study Area is demarcated in the Project Plan required by Condition U11.2.