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The ISTC Clearinghouse and the U.S. EPA's Environmental Education Center has many publications that teachers can use in the classroom
In November 2006, the United States Environmental Protection Agency released the Ground Water Rule. The primary goal of this initiative was to increase the protection against harmful bacteria and pathogens in public water drinking supplies that use ground water. The Ground Water Rule requires ground water sources with risk of contamination to take action that will further protect consumers.
Storm water is generated when precipitation from rain and snowmelt events flows over land or surfaces and does not infiltrate into the ground. Storm water can also be caused from construction activities. All construction sites required to obtain permit coverage must implement a range of erosion and sediment controls and pollution prevention measures. Beginning on August 1, 2011 all sites that disturb 20 or more acres of land at one time are required to comply with the turbidity limitation. On February 2, 2014 the limitation applies to all construction sites disturbing 10 or more acres of land at one time. These sites must sample stormwater discharges and comply with a numeric limitation for turbidity. The limitation is 280 NTU (nephelometric turbidity units).
"Our company purchased the Hanna Instruments model 98703 portable Turbidity Meter in April 2008. Since then, it has seen varied and rugged use in the heavy construction industry. It has worked flawlessly in that time. We are very satisfied with the performance of this fine instrument, and believe it has been an excellent choice in turbidity metering."
- TAPANI UNDERGROUND, INC