Skip to main content

The New York City Department of Environmental Protection's Pilot Phoshorus Offset Program: A Model forResponsible Development Within a Watershed.

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

Kent Manor is a 303 unit affordable housing condominium project located in the Town of Kent, Putnam County, New York, and is located within the New York City watershed. Prior to the construction of the project, the New York City Department of Environmental Protection (NYCDEP) enacted their final watershed regulations prohibiting surface discharges from wastewater treatment plants. Subsequently, the NYCDEP stopped the Kent Manor project.

The watershed regulations had provisions for a pilot phosphorus offset program, whereby up to three projects within the watershed with surface discharges would be approved, provided that any increase in phosphorus loading would be offset somewhere else in the watershed.

Malcolm Pirnie prepared an application for inclusion in the pilot program, which included a design to route all storm water runoff and the wastewater treatment plant discharge through two extended detention ponds, a series of constructed wetland “modules”, and a wet pond with a wetland marsh fringe. Analytical modeling showed that the post-development phosphorus load was approximately 20 pounds per year. Because the pilot program required a three-to-one offset for the increased phosphorus load, a total of 60 pounds per year of phosphorus would need to be offset within the same watershed.

An existing off-site shopping center was selected as the most favorable location for the offset. The calculated loads from the shopping center met the 60 pounds criteria. A storm water treatment system that utilizes pelletized organic matter to remove nutrients and other pollutants was proposed. The treatment system is installed “in-line” into the existing storm water conveyance system, is below ground, and requires minimal earth disturbance and maintenance.

The pilot phosphorus offset program provides a mechanism, in conjunction with Total Maximum Daily Load (TMDL) calculations to a receiving water body, to allow economic growth to continue while maintaining and enhancing water quality.

Document Type: Research Article

DOI: https://doi.org/10.2175/193864700785148982

Publication date: 2000-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more