For AGL's Fugitive Monitoring Program reports, visit Camden Gas Project Documents.
As part of the Stage 2 expansion proposal, AGL commissioned Mine Subsidence Engineering Consultants Pty Ltd (MSEC), to investigate the potential for the proposed coal seam gas extraction to result in surface subsidence.
The AGL Camden Subsidence Report (PDF) concluded that "the proposed extraction of coal seam methane at Camden will not create large voids in the strata, nor leave remnant pillars. The strata within the coal measures are not unconsolidated and in fact are hard and well consolidated rocks. The conditions for significant subsidence to occur are not therefore present and it is concluded that the potential for subsidence to occur as the gas is extracted is almost negligible."
For AGL’s Environment Protection Licence, Incident Notification Protocol and Community Notification Protocol, visit Camden Gas Project Documents.
Annual Environmental Performance Reports (AEPRs) and Independent Audits are part of the NSW Government's requirements under the various approvals, leases and licences for the Camden Gas Project. Copies of the AEPRs and Independent Audits are available for download in the document tab. Please note that these reports are provided for information purposes only.
For quarterly and monthly air monitoring data, visit Monitoring Data or find them filed on Camden Gas Project Documents.
Water management
Protecting and understanding local water resources is a critical part of the sustainable development of AGL's coal seam gas operations. You can view all groundwater monitoring reports and water studies in our document library.
Groundwater investigation and monitoring program
The Camden Gas Project groundwater investigation and monitoring program was developed by AGL and environmental specialists, Parsons Brinckerhoff, to help the community understand what impacts, if any, there might be on groundwater resources as a result of exploration for and production of natural gas.
The monitoring program involves dedicated monitoring bores that monitor the groundwater in the shallow aquifers within the Camden Gas Project and at a control site away from the Project.
The completed and planned work investigates connectivity between the shallow groundwater aquifers and water bearing zones in the coal seams. Two key findings of the work to date indicate negligible or no connectivity: the shallow groundwater is chemically different from the deeper coal seam groundwater, and flow within the groundwater systems appears to be mostly lateral, rather than vertical.
- 2016/17 Annual Monitoring Report (PDF)
- 2016/17 Half 2 April 2017 (PDF)
- 2016/17 Half 1 October 2016 (PDF)
- 2015/16 Annual Monitoring Report (PDF)
- 2015/16 Half 2 (PDF)
- 2015/16 Half 1 (PDF)
- 2014/15 Annual Monitoring Repor (PDF)
- 2014/15 Quarter 4 (PDF)
- 2014/15 Quarter 3 (PDF)
- 2014/15 Quarter 2 (PDF)
- 2014/15 Quarter 1 (PDF)
- 2013/14 Annual Monitoring Repor (PDF)
- 2013/14 Quarter 4 (PDF)
- 2013/14 Quarter 3 (PDF)
- 2013/14 Quarter 2 (PDF)
- 2013/14 Quarter 1 (PDF)
- 2012/13 Annual Monitoring Report (PDF)
- Groundwater monitoring network drilling and completions report (2014) (PDF)
- Completion report: Glenlee monitoring bores (GLMB01 and 02) conversion to vibrating wire piezometers (PDF)
Previous results from the groundwater monitoring program are listed on Camden Gas Project Documents.
Additional information
The hydrogeological summary of groundwater system (PDF) in the region, includes a review of data collected from the Camden Gas Project.
Produced water is natural groundwater that is removed from the coal seams (which are approximately 700 metres below the ground) in order to allow the natural gas to flow. AGL analyses produced water quality from a selection of operating gas wells each quarter, as described in the Groundwater Management Plan. The monitoring results are available in the document library and on Monitoring Data.
In 2011 and 2012, AGL’s water quality monitoring program found the produced water from some gas wells had significantly lower levels of salt than expected (at a level similar to rainwater or river water) and also a different ratio of the type of salts than is typical for coal seam gas wells at the Camden Gas Project. AGL wanted to understand why.
After conducting internal investigations, AGL engaged Parsons Brinckerhoff to investigate the lower salinity of produced water coming from some gas wells and to provide reasons why this was happening. Following expert chemical and isotope analysis, Parsons Brinckerhoff found that the low salinity water does come from the coal seam but it has been physically and chemically changed due to changes in pressure and temperature. The results from this investigation are very important in continuing to build on our comprehensive understanding of groundwater, produced water and coal seam gas operations for the Camden Gas Project. Download the 2013 Parsons Brinckerhoff report (PDF) and summary (PDF).
As part of its coal seam gas exploration and production programs in NSW and QLD, AGL Upstream Gas commissioned a desktop study on the occurrence of naturally occurring hydrocarbons in groundwater from Permian coal measures and associated sedimentary rocks. The report, prepared by CSIRO, Earth Science and Resource Engineering - Petroleum and Geothermal Research Portfolio Group, concluded that most of the detected total petroleum hydrocarbons, PAH (polycyclic aromatic hydrocarbons) and BTEX (benzene, toluene, ethyl benzene and xylenes) compounds appear to be naturally occurring.