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Landfill Technical Support

Landfill Technical Support

Farallon is providing technical and regulatory compliance support for the RI/FS for the former South Park Landfill in South Seattle on behalf of a private developer, the City of Seattle, and King County in accordance with the provisions of MTCA with Ecology oversight.

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Farallon’s involvement has included providing technical support during negotiation of an Agreed Order with Ecology, compiling historical data, identifying data gaps to facilitate development of an RI/FS Work Plan, and performing ongoing assessments of soil, groundwater, surface water, and landfill gas to focus completion of the RI. Work at the site is being carried out under a collaborative agreement to obtain regulatory closure of the former landfill and to support near- and long-term redevelopment activities at and adjacent to the landfill site. Farallon also developed a draft Interim Action Work Plan and an engineering design for the capping of an undeveloped 20-acre parcel within the former landfill boundary, installation of a landfill gas collection and control system, and placement of a stormwater conveyance and control system. Shoring and leachate control systems were incorporated into the design documents for areas of the landfill perimeter to facilitate integration with adjacent street improvements.

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