Savin Engineers, PC is the Program Manager for Westchester County’s Long Island Sound Nitrogen Removal Program. This significant project is a long term improvements program to reduce nitrogen and other pollutants that currently discharge to the Long Island Sound. The project involves the four Westchester County owned Long Island Sound Wastewater Treatment Plants (Blind Brook, Mamaroneck, New Rochelle, and Port Chester).  Savin Engineers assisted in negotiating an order-on-consent to define a reasonable timeframe for the development of the program. This allowed the delay of stringent Nitrogen limits by 10 years.  All deliverables of the consent order were met.

The $515M master plan included the evaluation of the existing facilities and the development of an independent facility plan for each of the four Long Island Sound Wastewater Treatment Plants (WWTPs).  To ensure a comprehensive and coordinated planning effort, Savin developed design and cost estimating standards for all applicable nitrogen removal technologies. Technologies included Membrane Bio-Reactors, Biofilters, IFAS (several types), MBBR, MLE. Borderpho, Breakpoint Chlorination wastewater additives and a combination of multiple  technologies.  Data from pilot testing at Westchester WWTP’s were used by Savin to develop standard design criteria.

Savin Engineers prepared the engineering plan that was approved by the regulatory Agency (NYSDEC).