All Along the Waterfront – Case Study Utilizing Various Remedial Strategies for a Large Brownfield Site in Yonkers, NY

Presented on Tuesday, December 3, 2019
Marc Godick, LEP1 and Patrick McHugh, PE2, (1)AKRF, Inc., (2)AKRF, Inc., White Plains, NY

We will present a case study for the combined groundwater remediation remedy of a 10-acre, $200 MM brownfield redevelopment project along the Hudson River waterfront in Yonkers, New York. The Site had multiple sources of historical contamination, including petroleum, historical fill, and coal tar from an off-site manufactured gas plant (MGP). Assessment of the Site occurred over a six-year period involving multiple parties and included traditional assessment techniques as well as TarGOST laser induced fluorescence technology to delineate the vertical and horizontal extent of coal tar contamination. The completed remediation was negotiated by a team of consultants and agencies while considering environmental exposure to the public, cost effectiveness, and feasibility. The Site remedy required a complex combination of remedial solutions including, in-situ soil solidification (ISS); auger column ISS; slurry wall; and injection of rigid foam along preferential utility pathways. In addition, traditional remedial methods were also utilized, including source removal by excavation and non-aqueous phase liquid (NAPL) recovery, bioremediation (e.g., oxygen release compound), sub-slab depressurization system, and site capping. Remedial efforts were complicated by a variety of factors including: an elevated, tidal water table in the floodplain; multiple geologic units; coal tar contamination at depth; poor soil quality/strength due to historical fill; deteriorated and aged municipal utilities and adjacent structures; nearby sensitive receptors including an adjacent food manufacturing facility; significant regulatory oversight; and redevelopment plans requiring construction in areas of residual contamination. The presentation will focus on the effect of remediation on groundwater quality, comparing pre- and post-remediation results in addition to discussing regulatory implications of baseline emerging contaminant sampling post-remediation.

Marc Godick, LEP
AKRF, Inc.
Marc S. Godick, a Senior Vice President of AKRF, leads the firm's Site Assessment & Remediation practice. Mr. Godick has over 29 years of experience in the environmental consulting industry, and has expertise in site assessment, remedial investigation, design and implementation of remedial measures, compliance assessment, and litigation support. Mr. Godick focuses on brownfield redevelopment for mixed-use, affordable and market rate housing projects, as well as commercial, industrial, utility, and infrastructure projects in the Northeast and Mid-Atlantic Regions in both the private and public sectors. Mr. Godick holds a B.S. in Chemical Engineering from Carnegie Mellon University and an M.E. in Engineering Science/Environmental Engineering from Pennsylvania State University.

Patrick McHugh, PE
AKRF, Inc., White Plains, NY
Patrick McHugh is a Technical Director at AKRF, with more than six years of professional experience in assessment, investigation, and remediation of environmental contamination-related issues. Mr. McHugh also has 16 months’ experience in petroleum engineering associated with exploration of oil and gas aquifers. Mr. McHugh has managed a variety of environmental projects with multi-disciplinary teams, including public agencies, developers, property owners, architects, and construction managers. His projects have fallen under the regulatory oversight of the USEPA and NYSDEC, including the New York State Brownfield Cleanup Program (BCP) and NY petroleum spills program, as well as multiple agencies in the Midwest.
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