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Green Smart Magazine : 2009_new
Careful masterplanning has facilitated the development of the estate's recycled water system network. All homes, businesses and community facilities within Mawson Lakes are dual-plumbed to separate the drinking water supply from the recycled water system. 'Everyone has to be hooked up to what's called the "purple pipe",' Vince says. This is a dedicated pipe network identified by the colour purple. It comprises both treated stormwater by the City of Salisbury Aquifer Storage Program, and treated wastewater from the SA Water Bolivar Treatment Works, both mixed to Class A standards before being pumped through the purple pipes. It is then used for watering gardens, parks, car washing and toilet flushing. Nothing is wasted when it comes to water on the estate and it is estimated the dual supply system has reduced potable water use by 50 per cent. It wasn't easy establishing these complex water systems, and there were many challenges. Prior to development, a large number of sheep graves were discovered because the site was formerly used as stock agistment yards. The site was treated and excavated to become the Sir Douglas Mawson Lake. There was also the issue of moving 1.5 million cubic metres of earth in a sustainable manner. In addition, an 8km pipeline had to be built to the nearby sewerage treatment plant, as well as a dual pipe reticulation system throughout the entire project. One thing's for sure -- the effort has been worth it. Residents here enjoy making a positive impact where they can and have embraced the lifestyle, says Vince. Alongside popular community activities such as the Summer Buzz month-long festival every January, barbeques, and carols by the lake, the community has a sustainable program for residents too. 'Since May 2005, all homeowners are required to complete the water and energy efficiency requirement scoresheet (WEER) to ensure every home in Mawson Lakes delivers a minimum five-star energy efficiency rating,' Vince says. A few aspects are mandatory, such as external shading to all northern, western and eastern glass, but others are encouraged: natural ventilation, heating and cooling options, and the use of smart household appliances. A score sheet allows residents to pick and choose the efficiency measures that will best suit their lifestyle, with the best scores recognised at a gala awards dinner. The commercial and retail components are required to have achieved a minimum four-star Australian Building Greenhouse Rating. Alongside the passive solar gain achieved by north-south site orientation, there are other energy efficient aspects too. smart essentials • passive solar orientation • dual plumbing systems • access to reserves and major transport hubs • extensive walking and bike trails • compulsory minimum five-star energy efficiency. Mawson Lakes is about the community as well as the environment. A number of events are held to foster networks and create a sense of belonging, some of which include a garden competition, village barbeques, project updates -- provided by the project director and held over drinks and nibbles -- and carols by the lake in December. Involvement is also fostered in sustainable activities such as participating in Earth Hour, Clean Up Australia Day, Ride to Work days and environmental expos. Another environmental initiative is the Sustainable Landscapes Project, which was established in conjunction with the Adelaide Botanic Gardens. The program educates through demonstrating horticultural practices, as well as promoting garden design, plant selection and efficient water use. The estate also has its own community website: www.mawsonlakescommunity.com.au, where members are provided up-to-date on-line information on all the latest news, local businesses, interest groups and community resources. embracing the lifestyle 50 greensmart 2009 IT IS ESTIMATED THE DUAL SUPPLY SYSTEM HAS REDUCED POTABLE WATER USE BY 50 PER CENT smarthomes