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South Stamford Revitalization

Stamford, CT

Services: Investigation
Clients Served: Real Estate Development

Loureiro was retained to provide investigation, feasibility study, hazardous building materials, and remedial design services associated with the $3.5 billion dollar, 6 million square foot “Smart Growth” mixed use building redevelopment project located in Stamford, Connecticut. The waterfront redevelopment project includes over 80 acres of vacant and underutilized industrial properties including historic manufacturing sites and manufactured gas sites.

Loureiro provided initial due diligence investigations to support the land acquisition. Subsequent to land acquisition, Loureiro has performed dozens of Phase I, II and III site investigations on nearly all of the 80 acres. As the project was fast-paced and the 80 acres was an assemblage or properties each with statutory obligations pursuant to the Connecticut Transfer Act, at any one time, Loureiro had up five separate investigations underway.

To address the project pace and diverse history of manufacturing operations, we developed dynamic work plans that provided for the rapid and cost effective gathering of data. We utilized numerous screening techniques including soil vapor surveys, soil and groundwater screening analysis, and field screening techniques. We also implemented more traditional investigation methods including continuous soil sampling from each soil boring and monitoring well borehole, low flow/low stress groundwater sampling from all existing and newly installed wells, evaluation of aquifer characteristics from in-situ testing, and laboratory analysis of soil samples for physical parameters. Utilizing our direct push Geoprobe® sampling equipment, we were able to gather significant amounts of data in a relatively short period of time and keep the projects moving.

The contaminants present within the redevelopment area included volatile and semi-volatile organic compounds, petroleum hydrocarbons, polychlorinated biphenyls, and heavy metals. Given the former industrial uses and the operation of manufactured gas plants, numerous areas where the potential for dense non-aqueous phase liquid (DNAPL) to be present in the subsurface were identified and assessed. Mobile-recoverable DNAPL was identified and project involved the assessment of data to address the fate and transport of the DNAPL.

Loureiro developed multiple remediation plans integrating the redevelopment with the excavation and/or relocation of contaminated soil, installation of engineered controls, and installation of active recovery systems. The integrated plan allowed construction to stay on track and ultimately saved our client millions of dollars when compared to conventional dig and haul remediation.

Highlights

  • Over 100 monitoring wells installed
  • Over 100 soil vapor screening points
  • Over 500 soil borings advanced
  • Managed multiple sites at once
  • Assessment of hundreds of releases and multiple release mechanisms
  • Development of numerous reports and remedial action plans