sulphur dioxide the latest update alcoa anglesea 2008 environment report january ANGLESEA ENVIRONMENT REPORT JANUARY 2008 air Air Monitoring Stack Monitors Average Maximum Opacity g/m3 10-minute average 0.064 0.204 Stack SO2 kg/min 1-hour average Licence limit 111.34kg/min 63.41 84.20 Ambient Monitors SO2 1 hour ppb Average Maximum Community Centre 0 3 Primary School 1 166 Mt Ingoldsby 1 26 Scout Camp 0 15 Camp Wilkin 1 120 Camp Road 1 129 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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 Primary School 6 0 0 2 11 5 1 0 0 101166 0 0 0 2 0 0 1 1 1 1 3 4 0 1 1 10 1 0 1 0 Mt Ingoldsby 9 0 1 0 26 2 0 0 2 3 5 3 2 6 5 3 4 6 2 6 6 5 1 5 3 3 20 0 3 4 3 Scout Camp 0 0 0 2 14 4 0 0 0 4 11 0 7 0 2 0 0 1 2 1 1 4 1 0 0 1 15 0 0 1 0 Camp Wilkin 3 0 0 1 5 5 1 1 1 20 2 0 0 0 2 1 0 1 1 1 0 2 1 0 0 1 13 1 0 1 1 Camp Road 4 0 0 1 81 1 0 0 0 16 129 0 0 0 1 0 0 1 0 0 1 3 1 0 0 0 1 0 1 0 EPA Intervention Level 210 Alcoa Local Standard 170 0 ANGLESEA ENVIRONMENT REPORT JANUARY 2008 water Water Storage Barwon Water storage levels for the Geelong system at 32.3% capacity. Stage 4 restrictions apply with a Daylight Savings exemption to permit limited residential garden watering. Water Discharge ML January Total Ashponds (SP1) 144 144 Mine (SP4) 0 0 Water Monitoring SP1 SP4 SP3 16/01/2008 Ashpond Mine Final EPA limit Lab Result EPA limit Lab Result EPA limit Lab Result pH 4-10 8.4 3-9 - 5-9 6.9 Susp. Solids 100 <4 100 - 30 <4 Colour 50 4 50 - 50 4 Aluminium 10.00 0.24 10 - 5.50 0.13 Iron 10.00 0.23 0 - 4.00 0.16 Zinc 0.40 0.02 2.0 - 0.30 0.04 WATER WATER USAGE PER MONTH (ML) Date JAN Town Water 1.4 1.4 Bore Water 279 279 Mine Water 53 53 FEB MAR APR MAY JUNE JULY AUG SEPT OCT NOV DEC TOTAL 3 0 0 .0 3000 2 5 0 .0 2500 2 0 0 .0 2000 1 5 0 .0 1500 1 0 0 .0 1000 5 0 .0 0 .0 500 0 ANGLESEA ENVIRONMENT REPORT JANUARY 2008 sulphur dioxide The investigation of management options for Alcoa Anglesea’s sulphur dioxide (SO2) ground level concentrations has been an ongoing issue for some time. In previous communications we have reviewed options for improved management of ground level concentrations of SO2 above 200ppb detected by one of our six monitoring stations around the Anglesea township. Whilst we have at all times been in compliance with the Stack SO2 discharge limit, one of the requirements of the new EPA licence was to submit a Sulphur Dioxide Management Plan in the latter half of 2007 to the local EPA to address ground level concentrations. This plan outlined our commitment to current practices such as reducing power station generation during high risk times and to investigate specific options further. Among the 25 plus technical solutions reviewed, the option of scrubbing is currently being pursued via the Front End Loading (FEL3) engineering study. This study is a highly detailed phase of the project design, which will be led by Alcoa with the help of Hatch Engineering. The project will commence in the first week of February and is due for completion in the later stages of this year. Along with the engineering study into the scrubbing solution, an increased community consultation program is required by the EPA to ensure the community are well informed of our current management practices, performance and ongoing investigations. In the interim, work is progressing with the consultancy group Environ, to understand if a predictive modelling tool using climatic conditions, that is currently in operation in Kalgoorlie, will be a good fit for our operations here in Anglesea. We have also been running information sharing sessions with our control room employees to understand what further improvements we can make to ensure we achieve zero non-compliance for 2008. ANIMALS OF THE ANGLESEA HEATH RASPY CRICKET (Apotrechus unicolor) Size: Distribution: Habitat: Up to 5 cm Victoria forests and woodlands, heath The Raspy Cricket belongs to the invertebrate Order Orthoptera from the Greek orthos = straight and pteron = wing. Grasshoppers, crickets, katydids and locusts all belong to this order. Orthopterans are easily recognisable by their hind legs, which are usually enlarged for jumping. They are often easily seen jumping away when disturbed. Many can produce sound by rubbing their legs, wings or abdomen together. It is predominantly males that produce these sounds to attract females. As with many groups of invertebrates there isn’t a lot of information on individual species. This is due to the large number of invertebrates - there are about 3000 species in Australia in the Orthoptera order alone. RASPY CRICKET ANGLESEA ENVIRONMENT REPORT JANUARY 2008 LAND RAINFALL (mm) Month JAN 2008 Rainfall 19.8 19.8 1968-2007 Average 44.5 44.5 FEB MAR APR MAY JUNE JULY AUG SEPT OCT NOV DEC TOTAL 7 00.00 130 120 6 00.00 110 100 5 00.00 90 80 4 00.00 70 60 3 00.00 50 40 2 00.00 30 20 1 00.00 10 0 0 .0 0 WATER TOWN WATER USE (ML) 2000 2007 2008 JAN Process 23.9 12.8 1.3 1.3 Amenity 11.6 1.5 0.1 0.1 FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 4 0 .0 2 .0 1 .8 3 5 .0 1 .6 3 0 .0 1 .4 2 5 .0 1 .2 1 .0 2 0 .0 0 .8 1 5 .0 0 .6 1 0 .0 0 .4 5 .0 0 .2 0 .0 0 .0 2 0 0 0 2 0 0 7 2 0 0 8 JA N F E B M A R A P R M A Y JU N JU L A U G S E P O C T N O V D E C AIR GREENHOUSE GAS (GHG) TOTAL (Mt) & GHG EMISSION EFFICENCY (t/MWh) GHG Mt GHG t/MWh 1990 2000 2001 2002 2003 2004 2005 2006 2007 2008 1.42 1.23 1.27 1.50 1.45 1.47 1.31 1.49 1.40 1.38 1.34 1.24 1.19 1.21 1.21 1.20 1.21 1.20 1.18 1.17 2 1600000 1 .8 1400000 1 .6 1 .4 1 .2 1200000 1000000 1 800000 0 .8 600000 0 .6 400000 0 .4 0 .2 0 200000 0 ANGLESEA ENVIRONMENT REPORT JANUARY 2008 environmental improvement Environmental Management Targets January 2008 Total Forecast 2008 Target Reportable Environmental Incidents 0 0 0 0 Monthly EHS ASAT Audit Completion (%) 100 100 100 90 Air Emission Targets January 2008 Total Forecast 2008 Target Ambient SO2 ( no. readings > 210ppb) 0 0 0 0 Stack SO2 (no. hrs > 100kg/min) 0 0 0 0 SO2 Load Reductions (lost MWh) 7.5 7.5 90 N/A GHG Efficiency (t CO2 e/MWh) 1.17 1.17 1.17 1.20 Opacity (10 min av > 0.25g/m normal operation) 0 0 0 0 Water Targets January 2008 Total Forecast 2008 Target Town Water (ML) 1.4 1.4 16.8 14.2 Bore Water (ML) 279 279 3348 2370 Waste Targets January 2008 Total Forecast 2008 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 2008 Total 2008 Target 2008 Area to Clear (ha) 0.0 0.0 2008 Area to Rehabilitate (ha) 0.0 0.0 2007 Mine Rehabilitation Species Richness (%) N/A 100 OUR ENVIRONMENT AND OUR EMPLOYEE Greg, what is your role at Anglesea? I am the Staff Engineer at the Anglesea Power Station incorporating engineering management, leading major projects and operations/maintenance support. One of my major roles this year is to lead engineering in FEL Stage Three which looks at accurately defining and costing the SO2 scrubbing technology for Anglesea Power Station. I am the Alcoa representative on an internationally-based (Toronto), Australia-wide and site-wide team. Where are we at with the SO2 scrubbing and what are the next steps? Right now we have just kicked off Stage 3 with an expected completion date of October this year. Following on from Stage 3 we need to do a rigorous business review which may lead to implementation starting in 2009. What other environmental initatives have you been involved with? I have provided engineering support to water-use reduction projects, auxiliary energy-use minimisation, researching clean coal technologies and improving overall plant efficiency. ...GREG HOLLETT