BETA assisted the Rhode Island Department of Transportation (RIDOT) with an environmental site investigation and the development of soil and groundwater remediation plans to support the construction of the Warwick Intermodal Station & People Mover, joining T.F. Green Airport and the Amtrak Northeast Corridor. The site of the future station was formerly occupied by the T.H. Baylis Chemical Co., Inc., a CERCLIS and RI State Site stemming from the release of chlorinated solvents to the environment.
BETA prepared specifications and plans for the remediation and demolition of the former facility. In preparation of the demolition, BETA coordinated a hazardous materials survey for inclusion into the contract documents. BETA completed the following tasks to bring the site into compliance with Rhode Island Department of Environmental Management (RIDEM) Site Remediation Regulations prior to construction of the station:
- Brownfields Agreement
- Environmental Phase I Site Assessment, site and adjoining properties
- Plume Delineation Study, site and impacted properties
- Interface with adjoining property owners, and City of Warwick and State of RI officials
- Remedial Action Work Plan
- Construction Plans and Specifications
- Temporary Sheet Pile Installation Design
- RIPDES Permitting
- RI Air Pollution Control Reg. No. 9 and 22 Permit, for emission of air toxics
- Remediation Oversight
The RIDEM approved remedial option that was proposed by BETA included the excavation of highly contaminated soil from three “source areas”, and the installation of over 80 air sparge/circulation wells and 13 SVE wells. The BETA designed system allowed for the remedial work to be completed “in-situ”, without the need for costly pumping and piping systems.
BETA conducted quarterly groundwater sampling for volatile organic compounds from seven wells to gauge the effectiveness of the treatment system.