Dual Phase Extraction System, Permitting Design, and Construction | Berkeley CA

A former industrial building located in Berkeley, California was undergoing redevelopment as commercial property. Historical industrial operations dated back to 1958 and these operations included a machine shop, paint booth, drying oven, and assembly areas. The degreasing operations resulted in the release of TCE to the soil and groundwater at the site.

Multiple environmental investigations dating back to 1986 identified that soil and groundwater underlying the site in the central and west portions of the building were impacted with Chlorinated Volatile Organic Compounds (CVOCs), including trichloroethene (TCE) and cis-1,2-dichloroethylene (cis-1,2-DCE); total petroleum hydrocarbons as gasoline (TPH-g); and metals. TCE in groundwater has been reported at concentrations up to 54 micrograms per liter in groundwater monitoring wells beneath the building. The site is also impacted with Dense Non-Aqueous Phase Liquid and (DNAPL) and Light Non-Aqueous Phase Liquid (NAPL).

The following activities were performed as part of this project:

  • Design Construction of a Groundwater Treatment and Discharge in Compliance with NPDES
  • Groundwater Treatment System Construction>
  • Groundwater Treatment System Permitting
  • Operation and Maintenance of Groundwater Treatment Systems
  • Preparation of a Feasibility Study for Remediation with Advanced Oxidation or Dual Phase Extraction
  • Preparation and approval of a Remedial Action Work Plan Amendment
  • Pilot Testing Work Plan and Approval for Remediation using Dual Phase Extraction
  • Pilot Testing of Dual Phase Extraction System and Reporting
  • Design of a Dual Phase Extraction System
  • Quarterly Reporting
  • Regulatory Compliance Support with the California Regional Board and DTSC

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