Description of Work: TCE-contaminated groundwater is present in a plume extending at least 12 miles downgradient from the site and poses a potential threat to the primary drinking water supply for the city of Cheyenne. HGS is performing the following tasks on this project.

• Collection of surface water, sediment, and subsurface vadose-zone vapor samples across the site.

• Sampling approximately 350 groundwater monitoring wells.

• Performing FUDSChem® and EnviroData® Database Entry and Management.

• Conduct TPP and RAB meetings, including and providing facilitation services.

• Prepare work plans and technical reports.