Licence conditions for pollution studies and reduction program


  

Licence conditions for pollution studies and reduction programs

Summary
 
Licence number: 1784
Title: PRP 801: Dry Well Infrastructure
Start date: 25 Jun 2014
 
Licence Condition
The objective of this PRP is to help prevent the overflow of sewage to the environment caused by the failure of sewage pumping station dry wells or associated infrastructure as a result of flooding or other causes.
The licensee must prepare a Dry Well Infrastructure Report that includes:   a) identification of all incidents in the licensee's network within the last 5 years in which dry well infrastructure has flooded or been inundated and that resulted in sewage being discharged to the environment;   b) identification and assessment of the causes of the identified incidents;   c) a risk assessment of dry well infrastructure across the entire Sydney Water network that takes into consideration:           i. siting of electrical infrastructure in relation to potential flooding or other dangers;           ii. operation and maintenance procedures relating to dry well infrastructure;           iii. the suitability of equipment used in dry well infrastructure;           iv. similarities with conditions that contributed to the identified incidents.   d) a review of the identified incidents and the findings of the risk assessment with emphasis on any pattern of incidents and the potential for further incidents relating to sewage overflows from the licensee's dry well infrastructure.
The licensee must prepare an Options Study if the review specified in Condition U2.2d) identifies any issues that require improvement.
The Options Study must:   a) consider the use or introduction of alternative equipment, procedures, engineering solutions and siting of equipment;   b) detail a range of feasible options; and   c) recommend a preferred option that will help mitigate the risk of sewage overflows from dry well infrastructure.
Each option must be supported by adequate justification, including a cost/ benefit analysis, to enable the EPA to make an adequate assessment of the option.
The licensee must submit the Dry Well Infrastructure Report and Options Study to the EPA by 31 December 2014.
The licensee is to engage a suitably qualified contaminated land consultant to conduct one round of groundwater sampling and analysis from the existing and additionally proposed groundwater monitoring well network at the premises. Groundwater monitoring wells MWA, MWB, MW01, MW02A, MW03B, MW04, MW05A, MW06A, MW07, MW10 as identified in the licensee's site layout map markup, submitted to the EPA on 21 August 2024 (EPA reference DOC24/695026) are be required to be sampled. Groundwater samples must be submitted to a NATA accredited laboratory for analysis of the following contaminant suites: Heavy metals Total recoverable/petroleum hydrocarbons Benzene, toluene, ethylbenzene, xylene, napthalene Volatile organic compounds Per- and poly-fluoroalkyl substances
The licensee must submit a groundwater monitoring report to the EPA by 30 September 2024 which:         a. Summarises the current groundwater conditions at the premises         b. Evaluates whether current concentrations on site pose any risk to surrounding human health or ecological receptors         c. Identifies whether there are any data gaps which should be addressed.  The report must be prepared, or reviewed and approved, by a consultant certified by an EPA recognised scheme. Further information, and a list of contaminated land consultant certification schemes recognised by the EPA is available on the EPA’s website at http://www.epa.nsw.gov.au/your-environment/contaminated-land/managing-contaminated-land/engaging-consultant.
The report required under condition E1.2 must be provided to the EPA via email at RegOps.MetroRegulation@epa.nsw.gov.au, copying in natalie.tan@epa.nsw.gov.au.