• Corporate HQ, NY
  • Melville, NY
  • Iselin, NJ
  • Ossining, NY
  • Mount Laurel, NJ

Wards Island Wastewater Treatment Plant


HAKS provided construction management services for a $13 million rehabilitation project at the Wards Island WWTP in upper Manhattan for the New York City Department of Environmental Protection. The upgrade focused on the antiquated petroleum and chemical transfer and storage systems at the plant, which were cited by the NYS Department of Environmental Conservation for not meeting current standards and codes. 

The work involved constructing petroleum spill containment slabs at seven locations; installing three fuel oil tank leak detection and inventory monitoring systems; constructing a new 45,000-gallon fuel oil storage facility and transfer system; upgrading the inventory control systems on nine existing chemical bulk storage tanks; and installing a new ferric chloride bulk storage and metering system.

Instruments and controls were installed for the existing chemical bulk storage facilities (sodium hypochlorite, polymer and caustic soda) to provide overfill protection and tank inventory control. Storage is in fiberglass reinforced plastic tanks, which are equipped with additional vents, drains and high-performance, chemical resistant coatings in their containment pits. Work at the existing sodium hypochlorite facility included an upgrade to the chemical fill stations and controls, vents and drains. Sodium hypochlorite is added to the treated wastewater as the final step before discharge.