47 AGL Energy Limited Annual Report 2012 Site Key Environment and Planning legislation Comments Torrens Island  Power Station, SA Environment Protection Act  1993; and Environment Protection (Site  Contamination) Regulations  2008 Voluntary sampling of soil and groundwater at Torrens Island Power Station in 2010 and 2011  detected notifiable levels of petroleum hydrocarbons and trichlorethene at a number of  separate locations. The South Australian Environment Protection Authority (EPA) was notified  under Section 83A of the Environment Protection Act. In line with EPA requirements,  groundwater monitoring and investigations are continuing to determine the extent and nature  of the impact, and the development of a management plan.  Torrens Island  Power Station, SA Environment Protection Act  1993 On 26 July 2011, approximately 2 litres of oil was spilt into the Port River from a cooling water  screen gearbox. The oil was promptly contained and cleaned up, and the EPA and Port Authority  were notified in accordance with the site licence. Hallett 2  (Hallett Hill) Wind  Farm, SA Environment Protection Act  1993; and South Australian EPA Wind  Farms Environmental Noise  Guidelines 2009 A permanent acoustic treatment to the turbines at the Hallett Hill wind farm was implemented  in late 2011 to address an audible tone that AGL detected at a nearby residence during certain  wind conditions. Prior to implementation of this treatment the wind farm was operated with 16  turbines shut down at night. Comprehensive noise testing was undertaken in early 2012 to  confirm that the tone was no longer audible at the residence. We have kept the resident and  the EPA informed of the steps that we have taken in relation to this issue. Hallett 4  (North Brown Hill)  Wind Farm, SA Environment Protection Act  1993; and South Australian EPA Wind  Farms Environmental Noise  Guidelines 2009 Post-construction noise testing was undertaken in late 2011 during which an occasional  audible tone was detected at a neighbouring residence during certain wind conditions. This  occasional audible tone resulted in a non-compliance with the noise criteria during the  particular wind conditions. A permanent acoustic treatment is being implemented at the wind  farm. We have communicated developments to the resident and the EPA.  Yarrawonga  Power Station,  Vic Protection of the Environment  Operations Act 1999  On 30 April 2012, an oil leak from Yarrawonga Power Station, which is situated on the  Victorian-New South Wales border, resulted in a small volume of oil entering the tail bay  waterway immediately downstream of the station. The oil did not enter the flowing Murray  River. The spill was contained and cleaned up. The release was reported to the NSW EPA, NSW  Fire Service and other agencies in accordance with the NSW EPA Incident Notification Protocol. Werribee Biogas  Facility, Vic Environment Protection Act  1970 On 13 June 2012, a non-compliance with EPA licence air emission limits was identified on one  of the nine generators located at the Werribee biogas facility following routine stack testing.  Upon identification of the non-compliance, EPA was notified, and investigations are underway  to determine the root cause and implement necessary corrective actions. Camden Gas  Project, NSW Protection of the Environment  Operations Act 1997; Petroleum (Onshore) Act  1991; and Environmental Planning and  Assessment Act 1979 Environmental Planning and  Assessment Act 1979 (NSW) An independent environmental compliance audit of the Camden Gas Project was completed in  September 2011, in accordance with the NSW Government’s requirements under the various  approvals and licences for the Camden Gas Project. The audit found that overall compliance  was of a high standard, although some minor non-compliances were identified. The audit report  was submitted to the Department of Planning and Infrastructure, and together with AGL’s  corrective action plan can be viewed at www.agl.com.au/camden.  AGL incorrectly reported that it had complied with a requirement of the Environmental  Protection Licence for the Rosalind Park Gas Plant. AGL confirmed that it had complied with an  obligation to continuously monitor the discharge of pollutants. Due to technical problems with  the monitoring equipment, AGL performed testing of emissions of pollutants on a quarterly  basis and they were within approved limits. AGL has notified the EPA of the breaches. Silver Springs Oil  and Gas Project,  Qld Petroleum Act 1923; Environmental Protection Act  1994; and Queensland Petroleum and  Gas (Production and Safety)  Act 2004 On 13 September 2011, approximately 1,000 litres of hydrocarbon was released from failed  equipment on a well pump. Most of the spill was collected within the well cellar and a small  amount overflowed onto the ground. Clean up and isolation of the spill occurred as soon as it  was identified. The incident was reported to the (then) Department of Environment and  Resource Management as required by the relevant Environmental Authority.  Arrow Energy  Moranbah Gas  Project Joint  Venture, Qld (Operated by  Arrow) Petroleum Act 1923; Environmental Protection Act  1994; and Queensland Petroleum and  Gas (Production and Safety)  Act 2004 On 17 August 2011, saline water was observed leaking from a pipe. Following identification of  the leak, the pipeline was immediately shut in and isolated. The release was less than 10,000  litres and was reported to the (then) Department of Environment and Resource Management. Table 1 – Summary of AGL’s Environmental Incidents and Non-Compliances