Licence conditions for pollution studies and reduction program


  

Licence conditions for pollution studies and reduction programs

Summary
 
Licence number: 1725
Title: PRP 700: Review of Dry Weather Leakage Monitoring Program Pollution Reduction Program
Start date: 23 Apr 2012
 
Licence Condition
700.1 The objective of this PRP is to improve the effectiveness of the dry weather leakage program by requiring the licensee to: a) review and assess the effectiveness of the program since its commencement in July 2005 in identifying dry weather leakage across the system and driving rectification works; b) review the current monitoring requirements to develop and recommend a revised monitoring program which factors in the risk of leakage from various parts of the system and that can be tailored to the sewage characteristics of each individual SCAMP or system; and c) identify and prioritise SCAMPs known to require intensive catchment investigation / rehabilitation works in order to inform negotiation of further licence specific works based PRPs.
700.2 The licensee must undertake a review of the results of the dry weather leakage monitoring program since its commencement in July 2005 and submit a report to the EPA by 31st May 2012. The report must include, but does not need to be limited to: i) detailed analysis and interpretation of the sampling data to identify trends in detected dry weather leakage across the system and also to identify the factors that are primarily contributing to the patterns of leakage identified; ii) details of responses to the detection of dry weather leakage including a description of investigation and rectification works undertaken to remedy the leakage (including a cost of these works) as well as works identified but not yet undertaken.
700.3 The licensee must undertake a review of the effectiveness of the current dry weather leakage monitoring program and submit a recommendation to the EPA for a revised risk based monitoring program for on-going monitoring of SCAMPS across the Sydney Water network by 30th June 2012. This report must include an indication of the implications for the costing of the proposed monitoring program associated with any recommended changes. The proposed monitoring program does not need to be limited to bacterial parameters, but can be extended (with justification based on known sewage characteristics each SCAMP/system) to other parameters that enable the detection of dry weather sewage overflows in receiving waters.
700.4 The licensee must undertake a review of all SCAMPs that consistently have sampling results above the investigation threshold of 10 000cfu/100mL and submit a recommendation for an investigation and works prioritisation program to the EPA by 31 July 2012. The review must include but is not limited to: i) a framework for prioritising SCAMPS ii) timeframes to undertake priority investigations and works identified using the framework established by i) above iii) a proposed approach and schedule for undertaking priority works for consideration by the EPA.
The EPA intends to implement further PRPs on the licences to require timely works in the poorest performing SCAMPs as negotiated with the licensee.
The Licensee must undertake macroinvertebrate monitoring that is designed to monitor the impact site of Eui Creek and compare the results against a control site. For the purpose of this condition "control" means a waterway reach of the same Riverstyle TM (Brierly and Fryirs) as Eui Creek Monitoring Reaches, without the impact of mining discharges. The monitoring must be undertaken by a suitable qualified and experience person and include macroinvertebrate monitoring twice a year during both Autumn and Spring at the following locations: a) in Eui Creek above the Eui Creek discharge points; b) at the Eui Creek spring and downstream of the Eui Creek Spring; c) in Webbers Creek above the confluence with Eui Creek; d) in Webbers Creek below the confluence with Eui Creek; and e) at control reaches with the same Riverstyle TM (Brierly and Fryirs) as Eui Creek. The monitoring must be consistent with the document titled Macroinvertebrate Plan Great Greta Colliery Final May 2021 prepared by Umwelt (Australia) Pty Limited. EPA Reference DOC21/436383
The Licensee must provide an annual report to the EPA, prepared by an appropriately qualified and experienced person, on the outcomes of the monitoring required by Condition E2.1 with the Annual Return. The Report must include analysis of the macroinvertebrate assemblages based on a beyond before and after control impact (Beyond BACI) style assessment. The analysis must compare impacted and control sites and include assessment of macroinvertebrate assemblage dissimilarity between impacts and control sites highlighting taxa / impact responsible for the majority of dissimilarity. The report must include any existing data, obtained from previous years to assess temporal changes and must include rainfall data for the period.