AIR QUALITY in MOUNT ISA Community Information About Air
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Fifth Edition, July 2018 AIR QUALITY IN MOUNT ISA Community information about air quality management at Mount Isa Mines Mount Isa is one of Australia’s most successful mining towns, with a demonstrated coexistence between industry and community. Air Quality in Mount Isa As modern regulations and accepted science evolve, so does Mount Isa Mines. Mount Isa is one of the most mineral-rich regions in the world. The natural, highly mineralised nature of the region is the reason We operate on the doorstep of a thriving Mount Isa has enjoyed such a long and rich mining history. city of around 22,000 people and we The copper and zinc-lead ores found in our into the community and through emissions region and mined and processed at Mount from our smelting operations. work hard to minimise any impact to our Isa Mines contain natural occurring sulphur We have stringent systems in place to and a range of minerals and metals such as local community. manage emissions and dust generated by lead, cadmium and arsenic. our operations to minimise impacts to the Our people and their families live When ore is processed, sulphur dioxide local Mount Isa community, as well as a (SO2) is released. Most of the copper comprehensive Air Quality Control Centre locally and call Mount Isa home so smelter gases are captured and that uses real-time air quality data to transferred to the Incitec Pivot Acid monitor emissions and observe emerging the wellbeing of the community Plant, which treats the sulphur dioxide to weather patterns. produce sulphuric acid. and operating responsibly will always For more information on our Metallic particulates can be released from management of air quality, refer to be our priority. our operations, through the transfer of dust page 4 of this brochure. Our obligations Our operations are managed under the Queensland environmental regulatory regime. In 2011, Mount Isa Mines transitioned to a new Environmental Authority in line with modern regulations, with further amendments in September 2015. Today, our 32,000 hectare mining lease is governed by over 80 separate permits and authorities, with stringent and transparent reporting of our environmental performance. Mount Isa Mines Air Quality in Mount Isa 1 About sulphur dioxide About metals Sulphur dioxide (SO2) is an odorous gas generated through natural The same minerals mined at Mount Isa Mines are the same as and industrial processes. In nature it is a gas released by volcanoes those that can be found outcropping throughout the city of or hot springs and is also produced when vegetation on land, in Mount Isa. As such, there are both natural and industrial sources wetlands or oceans decay or break down. of mineralisation intermixed throughout Mount Isa. In Australia, the largest source of sulphur Symptoms can include: The copper and zinc-lead ores mined and Metals including cadmium and lead, dioxide in the air is from industrial processed at Mount Isa Mines contain are common industrial emissions • Coughing, wheezing or processing or materials containing sulphur, a range of naturally occurring minerals, released mainly as a result of various shortness of breath such as the smelting of sulphide ores or including metals such as lead, cadmium industrial activities and can contribute electricity generation from coal, oil or gas. • Dry or irritated throat and arsenic. to the deposition and build-up of these Sulphur dioxide is also present in emission • Watery, itchy eyes metals in soils. • Lead – A soft, malleable metal. At Mount from cars, buses and trucks as the result When there are higher levels of sulphur Isa Mines, zinc-lead-silver ore is mined Mount Isa Mines has comprehensive of fuel combustion. It is widely used to dioxide in the air and a person feels they underground at George Fisher Mine and programs in place to minimise manufacture a number of household are being affected, they should limit their Lady Loretta Mine and processed, along emissions generated by our activities goods such as in wine making as an physical activity, particularly if outdoors as with third party concentrate to produce for our workforce and the community. antibiotic and antioxidant, and added as a this increases the volume of air breathed in. lead concentrate and lead bullion. You can reduce your exposure risk by preservative in dried fruits because of its maintaining a clean home, good hygiene, antimicrobial properties (preservative 220). If possible move indoors and close • Arsenic – A grey crystalline mineral and a healthy diet. windows and doors, and use air in its solid state, and also naturally HEALTH EFFECTS OF conditioning on recirculation mode until occurring in water and some food in a For more information on reducing your SULPHUR DIOXIDE outside air quality improves. dissolved organic form. It can be found exposure to lead and other metals, in air or soil and is commonly associated the Lead Alliance can provide useful Our senses easily detect sulphur dioxide Unless consistently exposed to very with copper ore, its products and advice and a range of helpful resources. at concentrations well below the level high concentrations, in most instances, by-products. You can contact the Lead Alliance on that may cause irritation or discomfort. exposure to sulphur dioxide does not cause 1800 457 547. At higher concentrations sulphur dioxide long-term health impacts to people. Some • Cadmium – A soft, ductile, silver- can irritate the throat, lungs, eyes, and to people may be more sensitive than others white or blue-white metal found a lesser extent, skin. The effects of sulphur to exposure to sulphur dioxide in the air. naturally in zinc sulphide based ores. dioxide can be felt very quickly, with most It can be released through mining and Those with lung conditions such as people feeling the worst symptoms within smelting activities. asthma, chronic bronchitis or emphysema 10 to 15 minutes after exposure. may find their conditions aggravated by sulphur dioxide. Over the past decade, Mount Isa Mines has achieved substantial reductions in the total emissions generated from our site, If you experience respiratory discomfort from sulphur dioxide, please consult a medical professional. particularly across a number of metals and metalloids. We have achieved this by significantly improving emission capture, better identifying emission sources and procedures to control them, and major advancements in how Key air quality improvement initiatives: we respond to emissions released and their impacts. • Significant improvements in emission capture ZINC COPPER LEAD ARSENIC CADMIUM • Better identification of emission sources and procedures to control them % % % % % • Major advancements in how we respond to the release of emissions and their 96 86 92 17 61 measured impacts, aligned with tighter environmental limits 2 Mount Isa Mines Air Quality in Mount Isa Mount Isa Mines Air Quality in Mount Isa 3 Our air quality management practises As part of our Queensland Government approved Environmental Authority, Mount Isa Mines employs four management plans to measure, manage and reduce dust and emissions generated from our operations. These include: We have strict clean-in clean-out procedures MANAGEMENT PLAN FOCUS AREA KEY CONTROLS to ensure no dirty work clothes leave site, In 2015 we relocated our zinc-lead ore everyone in lead-exposed areas must shower crushing activities out of town to our Process Emissions Process generated dust Ventilation and dust capture systems, before going home George Fisher Mine operation Management Plan and the ongoing review enclosure of operations such as conveyors and implementation of or sheds, wetting of materials, and mist or controls fog sprays to capture dust as it is emitted Key air quality • Ongoing enforcement of strict clean-in Open Areas Wind driven dust from Dust suppression of stockpiles through improvement initiatives clean-out procedures and dedicated Management Plan open areas on the watering and use of agents to bind wash bays for vehicles, to stop material Mount Isa Mines site surfaces. Onsite materials are contained in Since 2003, we have invested in excess leaving site on people and equipment sheds and regular cleaning, wind breaks, of $500 million in environmental stockpile covers and surface roughening • Established the ApportionIsa system expenditure to significantly improve is also employed to pinpoint sources of containments our environmental performance. on site Road Hygiene Managing dust Vehicle wash down and tyre cleaning This includes more than $5 million Management Plan generated from vehicle facilities, road cleaning equipment, on- directly invested into environmental • Installed 24/7 camera monitoring. movement road sampling, established containment zones to reduce silt trackage, covering air quality system improvements and vehicle roads, sealing of previously management initiatives. AIR QUALITY MANAGEMENT unsealed roads and vehicle speed restrictions Over the years we have implemented • Major upgrade of our air quality industry-leading projects targeting air monitoring network on site and within Air Quality Overarching plan to This plan promotes a continuous quality management and continue to Management Plan ensure compliance improvement process aimed at the community improve our environmental performance with the air quality identifying significant dust hazards and • Installed two continuous metals monitor requirements of establishing site specific best practice and enhance what is already the most our Environmental dust controls sophisticated air