ebb and flow Anglesea Borefield Project is commissioned alcoa anglesea 2010 environment report february ANGLESEA ENVIRONMENT REPORT FEBRUARY 2010 air Air Monitoring Stack Monitors Average Maximum Opacity g/m3 10-minute average 0.05 0.165 Stack SO2 kg/min 1-hour average Licence limit 100kg/min 63.21 77.31 SO2 1 hour ppb Average Maximum Community Centre 1 62 Primary School 1 131 Mt Ingoldsby 0 94 Scout Camp 1 92 Camp Wilkin 1 49 Camp Road 1 111 Ambient Monitors Ambient Monitors SO2 Maximum 1 hour averages (ppb) Date 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Community Centre 0 0 0 12 0 0 0 0 0 2 2 2 2 1 1 2 2 0 1 62 0 0 0 0 0 19 0 0 0 0 77 Primary School 0 3 2 12 0 0 1 1 9 0 1 0 0 0 0 0 3 0 42 97 1 0 0 0 0 131 1 0 1 1 116 Mt Ingoldsby 0 2 2 2 0 0 1 0 94 3 2 0 0 0 0 0 3 0 26 5 0 0 0 0 0 1 1 0 0 2 3 Scout Camp 0 2 2 1 0 0 1 1 3 0 1 0 0 0 0 0 3 0 2 2 92 1 0 0 1 15 0 0 2 6 Camp Wilkin 1 3 2 49 0 1 1 1 17 1 0 0 0 1 0 1 3 1 25 20 1 0 0 0 0 3 0 1 1 2 2 Camp Road 0 0 1 0 0 0 0 4 0 0 0 0 1 0 1 0 80 111 0 0 0 0 0 41 0 0 0 1 73 EPA Air Quality Objective 200 Alcoa Local Standard 170 0 0 1 ANGLESEA ENVIRONMENT REPORT FEBRUARY 2010 water Water Storage Barwon Water storage levels for the Geelong system at 30.8% capacity. Stage 3 restrictions apply as of March 1 2010 with an exemption to permit limited residential garden watering. Water Discharge ML February Total Ashponds (SP1) 104 254 Mine (SP4) 0 0 Water Monitoring SP1 SP4 SP3 22/02/2010 Ashpond Mine Final EPA limit Lab Result EPA limit Lab Result EPA limit Lab Result pH 4-10 7.5 3-9 no 5-9 7.2 Susp. Solids 100 <4 100 discharge 30 <4 Colour 50 4 50 at 50 5 Aluminium 10 0.3 10 time 5.5 0.29 Iron 10 0.16 0 of 4.0 0.19 Zinc 0.4 0.028 2.0 sampling 0.30 0.015 WATER WATER USAGE PER MONTH (ML) Date JAN FEB MAR APR Town Water 1.2 1.0 2.2 Bore Water 284 258 542 Mine Water 59 45 104 MAY JUNE JULY AUG SEPT OCT NOV DEC TOTAL .. ANGLESEA ENVIRONMENT REPORT FEBRUARY 2010 anglesea borefield project update To Geelong’s newest water resource, the Anglesea Borefield is nearing completion. The borefield taps into a massive aquifer stretching from the Otways to Bass Strait. It involves seven production bores drawing groundwater from the Lower Eastern View Formation (LEVF) from up to 700 meters below the surface. Once fully operational, the borefield will supply an average of 7,000 million litres per year, or the equivalent of 20% of Geelong’s current annual demand. Testing and commissioning of the first three bores, as well as the pretreatment plant at the northern borefield, took place in October and November 2009. This involved powering up switchboards and process equipment, such as pumps and mixers, and testing them to ensure they performed to the required standard. The commissioning of the fully automatic control system, including a 24-hour telemetry monitoring system, has also been completed. The first water was pumped from the borefield to Barwon Water’s Wurdee Boluc Reservoir, a distance of about 20 km, on 23 November 2009. Drilling continues on the remaining two bore sites Coalmine Road near Fraser Ave and at the top of Messmate Track on Harvey Street. Two deep observation bores will also be constructed during 2010. Alcoa Anglesea was involved in the construction process - accepting the bore development water to be treated within our ash ponds and allowing infrastructure to be located on sections of our land. How the system works: Pumps transfer the groundwater into a pipeline, which carries the water to a treatment plant on Forest Road, Anglesea. Here the water is treated to remove the smell of sulphur and to adjust its pH. The water then flows into a series of tanks and then into a settling basin where solid forms of iron and manganese are removed. Pre-treated water is pumped via a transfer pipeline to the Wurdee Boluc Reservoir. Here it is mixed with water from West Barwon Reservoir and Barwon Downs Borefield (when operating). The water is then treated to drinking standard before distribution throughout the Geelong region, including Anglesea, Torquay, the Bellarine Peninsula and Lara. Water quality testing is underway to ensure water extracted from the aquifer is treated to the required standard. Monitoring and Assessment: Monitoring and analysis of the performance of the aquifer is being carried out daily. The monitoring program involves 37 observation bores and eight surface water sites, as well as eight terrestrial and 11 aquatic sites. Alcoa Anglesea extracts water from the Upper Eastern View Formation (UEVF). Ongoing monitoring of the underground aquifer, surrounding flora and fauna, streams and rivers will ensure the borefield is a sustainable water source into the future and that the project has a minimal impact on both the environment and the UEVF. PLANT OF THE ANGLESEA HEATH RED BEAKS (Pyrorchis nigricans) Pyrorchis ....from the Greek pyre, fire, and orchis, orchid, refers to the need for fire in order for flowering to occur nigricans...from the Latin, nigrescens, becoming black, referring to the black colour of the withered flowers Size: Form: Foliage: stem to 25 cm high robust terrestrial herb ground-hugging, heart-shaped fleshy, leathery leaf, 12 cm long to 8 cm wide Flowers: flower stem usually only appears after fire bearing 4 to 6 flowers; flowers are white with red stripes with dark red tips September to October Habitat: coastal banksia woodland, tea-tree heath, grassy low open forest Did you know? the leaves are a common sight but flowers only after a hot summer bushfire stimulates the flower next Spring PYRORCHIS NIGRICANS ANGLESEA ENVIRONMENT REPORT FEBRUARY 2010 LAND RAINFALL (mm) Month JAN FEB MAR APR 2010 Rainfall 19.0 41.6 60.6 1968-2009 Average 42.9 41.6 84.5 MAY JUNE JULY AUG SEPT OCT NOV DEC TOTAL WATER TOWN WATER USE (ML) 2000 2009 2010 JAN FEB Process 23.9 13.5 2.0 1.1 0.9 Amenity 11.6 2.7 0.2 0.1 0.1 MAR APR MAY JUN JUL AUG SEP OCT NOV DEC AIR GREENHOUSE GAS (GHG) TOTAL (Mt) & GHG EMISSION EFFICENCY (t/MWh) GHG Mt GHG t/MWh 2000 2002 2003 2004 2005 2006 2007 2008 2009 2010 1.23 1.50 1.45 1.47 1.31 1.49 1.40 1.42 1.35 1.43 1.24 1.21 1.21 1.20 1.21 1.20 1.18 1.20 1.21 1.16 ANGLESEA ENVIRONMENT REPORT FEBRUARY 2010 environmental improvement Environmental Management Targets February 2010 Total Forecast 2010 Target Reportable Environmental Incidents 0 0 0 0 Env Near Miss vs Env Incident Run Rate (ratio) 6 10 8 2.5 Monthly EHS ASAT Audit Completion (%) 100 100 100 90 Air Emission Targets February 2010 Total Forecast 2010 Target Ambient SO2 (no. readings > 200ppb) 0 0 0 0 Stack SO2 (no. hrs > 100kg/min) 0 0 0 0 SO2 Load Reductions (lost MWh) 7 17 102 N/A GHG Efficiency (t CO2 e/MWh) 1.18 1.16 1.16 1.20 Opacity (10 min av > 0.25g/m normal operation) 0 0 0 0 Water Targets February 2010 Total Forecast 2010 Target Town Water (ML) 1.0 2.1 12.6 14.0 Bore Water (ML) 258 542 3249 4000 Waste Targets February 2010 Total Forecast 2010 Target Waste to Landfill (t) 0.0 0.0 0.0 8.0 Solid Prescribed Waste to Landfill (t) 0.0 0.0 0.0 0.0 3 Mine Rehabilitation Targets 2010 Total 2010 Target 2010 Area to Clear (ha) 0.0 TBC 2010 Area to Rehabilitate (ha) 0.0 TBC OUR ENVIRONMENT AND OUR EMPLOYEE Hi Maryann, I understand that you were heavily involved in the Anglesea Borefield Project. What did this entail? As part of the project, Barwon Water needed to conduct pump testing from the test production bore to assess aquifer parameters such as storage capacity and long term yields. The initial development water produced by the drilling process contained suspended solids. Barwon Water used our ash ponds to treat this water, as fly ash works quite well as a coagulant to remove the solids. We needed to obtain permission from the EPA to accept this water as it is discharged from site via our licence discharge point. We also had to install temporary piping and a caustic dosing system. How did accepting the bore development water affect Alcoa’s ash ponds? The extra water meant that we needed to continually discharge from the ash pond, so the pH needed to be kept above pH 7.0. This entailed dosing the pond with caustic and lots of time spent testing the water to ensure the discharge did not contravene our EPA Licence. Thanks for all your hard work Maryann! ...MARYANN THORP