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Uploaded on Nov 14, 2011
NTS provides an environmentally sound way to adress the pollution caused by urban runoff. Further, it is more cost effective than alternatives like building bigger sewers and retrofitting existing ones to accept the increased demand on the system that would be required if the storm drains and sewers were combined. Combining sewers and storm drains can cause significant treatment plant problems as it is common for combined systems to become overwhelmed during periods of heavy rain, resulting in sewage spills. NTS allows sewers and storm drains to remain separate.