Westchester County, New York

Water Supply Infrastructure Assessment and Compliance Reviews

Third Party Compliance Review of Water Supply and Treatment Facilities 2

In Westchester County, New York, under the auspices of the Department of Environmental Facilities (DEF), First Environment has performed compliance audits of two water supply districts within the County.  The districts include operations at the Kensico Dam, Gates of Heaven Pump Station, and the Crisfield Street Pump Station that perform chemical treatment, storage, and conveyance of public water supplies serving communities in Westchester County. 

First Environment assessed water supply treatment activities including the injection of sodium hypochlorite for disinfection, pH adjustment, and the addition of suitable chemistry to deter the corrosion of drinking water conveyance systems and piping. Our audit assessed the compliance status of the water districts with respect to applicable federal, state, and local environmental laws, regulations, and associated permit requirements in support of the development of an ISO 14001 environmental management system (EMS).

First Environment’s audit services involved kickoff meetings; pre-audit records and document review, field survey efforts and site observations; and report preparation. We entered findings into DEF’s nonconformance databases to ensure they were tracked appropriately towards resolution.

The audits at the water supply districts were part of multi-year regulatory compliance reviews for seven wastewater treatment plants (WWTPs), 41 pump stations, two overflow retention facilities, 20 storm flow regulating chambers, approximately 194 miles of trunk sewers serving 13 sanitary sewer districts; the pre-treatment program; and a solid waste division consisting of a recycling facility, a waste-to-energy plant and three transfer stations. Treatment plants that First Environment has assessed include the Yonkers Joint WWTP, Blind Brook WWTP, New Rochelle WWTP, Ossining WWTP, Peekskill WWTP, Mamaroneck WWTP, and Port Chester WWTP.

Due to the length of our contract with DEF, we have been able to conduct regulatory assessments at the treatment plants and water supply districts many times over, allowing us to observe the number of environmental deficiencies decrease as implementation of the EMS has taken root.