Sedimentation 101: Gravity Settling

Since 1901, the drinking water industry has relied on proven scientific principles for the removal of sediment particles from water. These scientific principles are based upon the known effects of gravitational force on the settling of sediment particles. There is a clear relationship between the amount of horizontal settling area (A) over which a flow of water (Q) is directed: the greater the A, the greater the amount of sediment removed from any Q.
The drinking water industry has been relying on the "inclined plate" technology to create the greatest amount of A within the smallest structure footprint to create the most efficient method for the removal of sediment particles from any given Q.
The Terre Kleen is the only stormwater hydrodynamic separator that uses the "inclined plate" technology to create the greatest A in smallest structure footprint.
Dr. Shirley Clark of Penn State University has conducted independent third party testing and analysis of the Terre Kleen's performance highlighting the efficiency of the inclined plate technology.
Terre Kleen has been certified for use by NJDEP at a loading rate of 18 gpm/sq ft of A. This certified loading rate results in the following loading rate for each structure footprint as follows:
TK 09: 33 gpm/sf of structure footprint
TK 18: 45 gpm/sf of structure footprint
TK 27: 52 gpm/sf of structure footprint
TK 36: 56 gpm/sf of structure footprint
TK 45: 59 gpm/sf of structure footprint
TK 54: 61 gpm/sf of structure footprint
TK 63: 63 gpm/sf of structure footprint

Terre Kleen Pretreatment Works

Terre Kleen removes pollutants from stormwater runoff. Terre Kleen primary chamber permanently removes gross pollutants such as oil, grease, trash, debris and sediment before these pollutants can enter and cause malfunction of an underground infiltration basin such as a Terre Arch system.

Picture shows the primary chamber of a Terre Kleen installed 12 months prior in a shopping center parking lot. If you do not design for pretreatment your BMPs will lose functionality and they will fail because they are clogged and choked up with stormwater runoff pollutants.

Don't risk a malfunction of your underground infiltration basin. Don't subject your LID BMP to gross pollutant and sediment overload.

Preserve the useful life and functionality of your stormwater LID BMPs.

Pretreat with Terre Kleen.

EPA Cites 79 PA MS4s for NonCompliance with NPDES Phase II

Terre Hill Stormwater Systems, a Pennsylvania manufacturer of NPDES Phase II Stormwater treatment and storage structures is in a unique position to assist the 79 Municipal governments that have been cited by the EPA Region 3 for noncompliance with the NPDES Phase II MS4 requirements.
Terre Hill Stormwater Systems is a division of Terre Hill Concrete Products. Terre Hill Concrete Products has been in existence since 1919, serving the needs of the sanitary sewer, storm sewer, highway, road and bridge industry.
Terre Hill Concrete Products is a NPCA certified manufacturer and is approved as a DOT provider in Pennsylvania, Maryland, Delaware and New Jersey.
Terre Hill Stormwater Systems is certified to provide NPDES compliant stormwater structures in PA, VA, NJ, NY, MD, DE, CT, MA, RI, NH,VT, ME, WV, TN. Terre Hill Stormwater Systems can assist each MS4 in identifying the areas that are not in compliance and, can assist in designing solutions in a cost effective and practical way.
Terre Hill Stormwater Systems works closely with PA Conservation Districts and PADEP in providing solutions for stormwater issues.
Terre Hill Stormwater Systems is currently installing its hydrodynamic separator, the Terre Kleen in several locations for local governments that are seeking to comply with MS4 requirements. Some of the municipalities are: Ocean County, NJ; Asbury Park, NJ; Warren County, NY; Essex County, NY; Town of Kent, NY.
Terre Hill Stormwater Systems has received certifications from NJCAT, NJDEP amd EPA-ETV-NSF.