Tacoma Historcal Coal Gas | Puget Sound Energy, Tacoma, WA

The Tacoma Tar Pits Superfund site is located where coal tar wastes had been released to low areas surrounding a former manufactured gas plant. These low areas were filled and are now used by a metal recycling operation.

For more than 15 years, DOF has provided Puget Sound Energy with the following remediation and monitoring services:

  • Managed the engineering team during the project remedial design
  • Served as the primary contact with EPA
  • Provided construction management and technical oversight
  • Facilitated the resolution of construction issues
  • Prepared the Remedial Construction Report
  • Managed the design and installation of a post-remediation pump and treat ground water containment system

DOF is currently responsible for operating the containment system, completing ground water monitoring, and reporting to the regulatory agencies.