Remedial Investigation at 250 Water Street

250 Water Street in the NYSDEC Brownfield Cleanup Program

250 Water Street, New York, NY — NYSDEC BCP Site No. C231127. Here you'll find updates on the site's environmental cleanup along with the regulatory milestones achieved under New York State's Brownfield Cleanup Program.

Construction Hotline

To ask a question, call or text 917-962-8166. For written inquiries, email [email protected]. In a public safety emergency, always dial 911.

Remediation at 250 Water Street Is Complete

We are pleased to share that environmental remediation of the 250 Water Street site concluded in December, and the New York State Department of Environmental Conservation (DEC) has issued a Certificate of Completion confirming that the Brownfield Cleanup Program (BCP) was carried out successfully. This Certificate of Completion Notice will be formally recorded with the New York County Clerk and filed with Manhattan Community Board 1.

All remediation work was carried out safely and in accordance with the Remedial Action Work Plan (RAWP) approved by the DEC and the NYS Department of Health (DOH) under the strict BCP requirements. A Community Air Monitoring Plan (CAMP) and a Construction Health and Safety Plan (CHASP) were in place throughout remediation as required. More information about the BCP is available on the project website.

The Howard Hughes team thanks everyone involved for their hard work, careful attention to detail, and commitment to safety and transparency throughout this remediation effort. To our neighbors, Seaport residents, and local businesses — many of whom took part in the thorough 250 Water Street BCP Working Group launched in Spring 2022 — we are grateful for your input and cooperation. We value your dedication to open communication and collaboration for the benefit of the entire Seaport neighborhood and all who live and work in this distinctive place.

Best wishes for a happy and healthy New Year!

About the Brownfield Cleanup Program

More than 100 New York City sites have been successfully remediated through New York State's Brownfield Cleanup Program (BCP), which encourages private-sector cleanup and redevelopment of urban brownfields with regulatory oversight from the NYS Department of Environmental Conservation and the Department of Health. The BCP emphasizes transparency and calls for strong citizen participation, offering many opportunities for public review and input on environmental investigation, remediation planning, and implementation.

Recent News and Investigation Milestones

Phase 1 — Non-Intrusive Investigation

Phase 1 of the remedial investigation concluded on June 15 and 16, 2020, and included an eight-hour baseline air monitoring event along with a geophysical survey.

Phase 2 — Soil Vapor

Phase 2 was completed on July 8 and 9, 2020, and involved on-site soil vapor sampling.

Phase 3 — Area of Concern #3 and Mercury Delineation

Phase 3 took place between July 27 and August 3, 2020, and covered soil borings, soil sample collection, and the installation and development of monitoring wells within Area of Concern #3, the former thermometer factory and workshops.

Phase 4 — Remaining Soil Borings and Monitoring Wells

Phase 4 was completed between August 17 and 26, 2020, and involved advancing the remaining soil borings, collecting soil samples, and installing and developing the remaining monitoring wells.

Phase 5 — Groundwater Sampling

Phase 5 ran from September 1 to 3, 2020, and included collecting groundwater samples and a synoptic groundwater gauging event.

Monitoring Well Elevation Survey

The monitoring well elevation survey was completed during the week of September 21, 2020.

NYSDEC-Approved Remedial Investigation Report

The Remedial Investigation Report (RIR) was approved by the NYSDEC and NYSDOH on June 25, 2021. The Final RIR is available on the Reports page.

NYSDEC-Approved Remedial Action Work Plan

The Remedial Action Work Plan (RAWP) received approval from the NYSDEC and NYSDOH on November 15, 2021. The Final RAWP is available on the Reports page.

NYSDEC-Approved Remedial Design Investigation Work Plan

The Remedial Design Investigation Work Plan (RDIWP) received approval from the NYSDEC and NYSDOH on February 11, 2022. The Final RDIWP is available on the Reports page.

NYSDEC-Approved Change to the RAWP Schedule

The NYSDEC approved a schedule change notification on March 29, 2022. The schedule change and approval letter are available on the Reports page.

NYSDEC-Approved Remedial Design Report and Revised Construction Health and Safety Plan

The Remedial Design Report and the Revised Construction Health and Safety Plan (CHASP) received approval from the NYSDEC and NYSDOH on May 12, 2022. The Final Remedial Design Report and Revised CHASP are available on the Reports page.

Site Details

250 Water Street, New York, NY — NYSDEC BCP Site No. C231127.