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Complex Environmental Site Redevelopment

Middlefield-Ellis-Whisman (MEW) Federal Superfund Site, Mountain View, California
Iris Environmental has evaluated the suitability of expanding the existing operations of a large software company to areas directly on top of a large Federal Superfund Site in the South Bay of San Francisco.

The development involved the demolition of numerous buildings and the construction of multiple two and three story buildings, each between 55,000 to 75,000 square feet in size. Contamination at the MEW Superfund Site consists principally of chlorinated solvents in the ground water, soil, and soil vapor. Active remediation of the groundwater continues. RPS worked closely with the client and negotiated with the developer to identify those areas of the site that would be most appropriate for future buildings based on the environmental issues and the construction specifications that would be necessary to mitigate potential for exposures by direct contact, ingestion, and inhalation. Additionally, RPS has initiated on-going indoor air sampling and risk communication programs for employees. Similar project scopes have been completed for additional large sites with past uses such as a missile manufacturing facility and large scale silicon wafer fabrication. These sites required site review and subsurface testing, remediation of select areas, indoor air quality surveys, evaluation of risks to future occupants, technical interface with local planning departments, CEQA mitigation measure evaluation, site investigation, and environmental due diligence assessments.