Terre Hill Stormwater Systems
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 Understanding NPDES Phase II

 

According to the United States Environmental Protection Agency (EPA), 281 million people in the United States live within ten miles of an impaired body of water – such as a stream, pond, lake or river that has been polluted by contaminants commonly found in stormwater runoff.

To combat the negative effects of such pollution, the EPA developed the National Pollution Discharge Elimination System (NPDES). Effective March 10, 2003, the goal of NPDES Phase II is to preserve, improve and protect our nation’s water resources from polluted stormwater runoff. 

Phase II regulations require all municipalities that own or operate a separate Municipal Storm Sewer System (MS4) to obtain a NPDES General Permit.

MS4s will be responsible for preventing degradation of receiving water bodies by reducing the volume, rate of flow and amount and type of pollutants in stormwater runoff.

Terre Hill Stormwater Systems permanently removes stormwater pollutants such as litter, oil, grease and sediment, as well as the nutrients and metals that attach themselves to the sediment. The Terre Kleen™ inclined plate hydrodynamic separator has been proven to remove 83% of TSS from stormwater runoff under NJCAT protocol, and has a 98% removal efficiency for 200 micron particles under EPA-ETV field testing.


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