The U.S. Army Corps of Engineers, New England District is issuing this Sources Sought Announcement to determine interest, availability, and capability of 8(a), HUBZone, Service-Disabled Veteran-Owned, Woman-Owned, and Small Business concerns to perform the work described below under a Best Value Fixed Price Remedial Action Contract (RAC). The NAICS code for this procurement is 562910 (size standard <1,000 employees). Remediation field work is expected to be performed in 2026, and two rounds of performance monitoring would be completed in 2027. The value of the project is expected to be in the $5M to $10M range.

The U.S. Army Corps of Engineers, New England District desires to identify contractors capable of providing Environmental Remediation Services for the installation of a permeable reactive barrier (PRB), or treatment line, using zero-valent iron (ZVI) to reduce hexavalent chromium (Cr[VI]) to less toxic trivalent chromium in groundwater in the mid-plume area of the site southeast of the Walton & Lonsbury (W&L) property. This work is part of ongoing remediation activities in accordance with the Record of Decision (ROD)(EPA, 2019).

Responses to this Sources Sought announcement will be used by the Government to make appropriate acquisition decisions. After reviewing responses to this announcement, and if the Government still plans to proceed with the acquisition, a solicitation announcement will be published in the https://sam.gov/ website for the respective project. NO SOLICITATION IS CURRENTLY AVAILABLE. All interested offerors will have the opportunity to respond to the solicitation announcement later.

Project Information:

The W&L Superfund Site is a former electroplating facility that operated from 1940 to 2007. Since 2010, several environmental investigation and remediation activities have been performed at the site, including removal of W&L facility buildings and residual waste materials, excavation and disposal of contaminated site media, and installation of an engineered cover behind residences along Paulette Lane and North Avenue to prevent upwelling of chromium-contaminated groundwater to the ground surface and to prevent direct exposure to chromium-contaminated soil. A PRB was constructed on the downgradient edge of the cover, with the goal of using zerovalent iron (ZVI) to reduce hexavalent chromium (Cr[VI]) to the less toxic trivalent chromium in groundwater before it discharges into Bliss Brook southeast of the W&L property.

The selected remedy for the mid-plume of this project involves installing a minimum 2.5-foot-wide treatment line located along the west side of North Avenue, spanning 209 feet from approximately 80 ft south of PDI-MID-03S to approximately 25 ft north of PDI-MID-04D (see provided site plan) to depths ranging from approximately 25 to 35 feet below ground surface, keyed into the underlying till. The reactive medium is a 63% ZVI/37% sand mixture by weight on average. Bench and Pilot Tests performed by HGL environmental consultants have ruled out injection delivery methods. The USACE is open to other construction means and methods, but consideration must be given to the physical constraints at the site, including a limited working area between a busy road, overhead utility lines, and a wetland (see provided site plan). Management of contaminated saturated soil may be required. A temporary access road would need to be constructed across an existing wetland to facilitate construction of the treatment line. Note that minimizing the road footprint may allow the possibility of leaving the road after treatment line construction if flood storage compensation is maintained and wetland impacts can be mitigated through value enhancements and/or replication elsewhere.

Other work expected to be included with this contract:

• Preparation of work plans, including but not limited to:
  • Work Plan
  • Air Monitoring Plan
  • Noise and Vibration Monitoring Plan
  • Stormwater Management Plan
  • Waste Management Plan
  • Site Access/Traffic Control Plan
  • Accident Prevention Plan with Health & Safety Plan
  • Construction Quality Control Plan
  • Erosion Control Plan
  • Quality Assurance Project Plan with Sampling and Analysis Plan
• Utility Protection
• Tree Clearing
• Earthwork
• Installation of temporary access road to work site.
• Disposal of Contaminated Soil
• Installation of groundwater monitoring wells associated with the PRB.
• Groundwater monitoring to evaluate the effectiveness of the PRB (Year 2).
• Wetland restoration.

All work will be performed in accordance with CERCLA, the September 2019 W&L Superfund Site ROD, and EPA green and sustainabilit