Site Assessments &
Remediation Project Examples
Waterfront Redevelopment of Former Petroleum Terminal
Norwalk, CT
Client: Moran Towing
Corporation
Description: This abandoned
waterfront parcel located on the Norwalk River was purchased by the
Moran Towing Corporation for potential redevelopment as a corporate
office building and marina complex. In addition to its use as a
bulk petroleum terminal and gasoline service station, historical
records indicate the site has a rich history of industrial use
including a foundry, boiler manufacturing plant, and hat manufacturing
business. Triton performed a comprehensive site investigation,
completed a remedial investigation, designed a remedial action plan,
and is currently completing remediation at the site.
In accordance with the Connecticut Transfer Act, the
project team collected site characterization data and evaluated known
and suspected oil and hazardous material releases. The project
team conducted soil sampling activities, installed groundwater
monitoring wells to evaluate groundwater quality, and completed soil
vapor monitoring activities to determine if benzene concentrations in
soil vapor required remediation. The investigation results
indicated that previous site activities had resulted in widespread
contamination of soils with petroleum products, metals, and VOCs.
Following the completion of investigation tasks, Triton
developed a conceptual site model and a remedial action plan (RAP)
which specified the required steps for compliance with the RSRs.
The RAP calls for the excavation of 1,300 tons of contaminated soil,
the installation of an air sparging/soil vapor extraction (AS/SVE)
system as well as engineered controls to isolate historic fill.
Cost estimates for the remedial work have been prepared to assist the
client with planning efforts for the proposed redevelopment of the site
which will include a potential marina component.
Role: Environmental site
assessments (Phase I, Phase II, Phase III), soil and groundwater
investigation, decommissioning and dismantling of petroleum storage
equipment, development of a RAP, and future site remediation and LEP
verification.
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