Solvent Plume, St. Louis Park, MN

Weston Solutions under EPA Region 5 START Program


The EPA Superfund Technical Assessment & Response Team (START) program provides technical support to EPA’s site assessment, response, prevention, and preparedness activities. Bay West was a subcontractor to Weston Solutions as an EPA Region 5 START contractor assisting with EPA activities in Minnesota. Since 2006, Bay West has worked on approximately 90 projects in Minnesota under this contract, one of which is the St. Louis Park Solvent Plume Project.

After solvents (primarily PCE and TCE) were detected in soil samples in a residential area of St. Louis Park, the MPCA and EPA jointly developed a plan for additional soil and vapor testing.

  • Bay West, Weston Solutions, and Home Safety Solutions (HSS [an Indoor Air Quality Consultant]) worked together to develop the scope and work plan to assess the extent and magnitude of the vapor issue (sampling and analysis) and mitigate the problem (residential vapor mitigation).
  • Bay West, under Weston’s EPA START Contract, conducted sub-slab and air sampling with basements and crawl spaces in approximately 270 residential homes. If solvents were detected at concentrations exceeding regulatory thresholds, Bay West inspected slabs, basements, and crawl spaces, then sampled indoor and outdoor air.
  • Bay West eventually provided support while the EPA equipped 41 homes with vapor mitigation systems, then conducted follow-up indoor air monitoring in these homes to provide evidence of the vapor mitigation systems’ effectiveness.
  • Bay West coordinated and attended two public meetings to present information to concerned home owners, obtain access agreements, and schedule access to home for assessment work and system installations.
  • Bay West also worked closely with the City of St. Louis Park to address home owner concerns and obtain access on residential properties throughout the project.

Related Projects

Former Superior Plating Superfund Site

Bay West was hired by the MPCA to provide additional technical support and third-party oversight. We have performed a wide variety of environmental activities for the MPCA at this site.

Hurricanes Katrina and Rita

Bay West supported cleanup following the Hurricanes Katrina/Rita disasters in Texas/Louisiana by providing more than a dozen task force leaders/supervisors to serve as EPA representatives on cleanup crews during removal of hazardous waste/debris.

Solvent Plume, St. Louis Park, MN

Bay West was a subcontractor to Weston Solutions as an EPA Region 5 START contractor assisting with EPA activities in Minnesota.

Duluth Brownfield Inventory Assessment

The City of Duluth retained Bay West to complete Limited Area-Wide Brownfield Inventories (AWBIs) in three select areas of the St. Louis River Corridor. These consisted of the following (collectively, the Study Areas): Gary-New Duluth, the Western Port Area Neighborhood (WPAN), and Lincoln Park/Rice’s Point.

Engineering and Environmental Teaming

We frequently team with engineering firms, both locally and on a national scale, that provide services we do not self-perform and/or that provide additional resources to develop cost-competitive, value-based solutions for our customers

Urban Infill – Jay Street Gas Holder

The property known as the Jay Street Gas Holder is currently owned by the City of Duluth, which plans to redevelop the property for residential uses.

PFAS Remediation: Former DoD Facility

Former DoD Facility PFAS Central Treatment System

Military Munitions Response Program

Bay West provided on-call UXO Construction Support services to Army construction projects at Fort Lewis as part of the Army’s program to deconstruct, construct, and upgrade its facilities at Fort Lewis.

Twin Cities Army Ammunition Plant (TCAAP), Arden Hills, MN

Bay West and our key staff have played an integral role at TCAAP over that past 20 years as the investigation and remediation contractor on several of the most high-profile waste disposal sites on the property, the redevelopment consultant for a development firm, and the third-party consultant for Ramsey County, providing technical expertise and oversight of cleanup activities.

Seymour Johnson AFB, Goldsboro, NC

In support of the US Air Force’s Performance-Based Remediation initiative, Bay West developed and executed closure/exit strategies for 16 Environmental Restoration Program (ERP) sites under this fixed-price, performance-based contract.

Eglin AFB, Fort Walton Beach, FL

Bay West performs munitions investigation and removal actions at Eglin AFB, which has historically conducted munitions development, testing and training.

Pacific Air Force Sites (PACAF), AK

Bay West performed Supplemental CSE Phase I and Phase II Investigations at eight PACAF facilities in Alaska (total of 1,813 acres within 47 Munitions Response Areas [MRAs]).

Talk to an Expert

Have questions about our services? Meet our experts!

Hillary Weber, PG

Hillary Weber, PG

Director, Federal Programs (USACE, EPA)

_New Site - Talk to an Expert

We’re hiring! Join our team today.

Open Positions