SoundEarth provided detailed technical support and due diligence services to a real estate developer prior to the purchase of this brownfield, which was the former site of a window manufacturer. Acids and bases had been used to etch window frames, and chlorinated solvents had been used in high volumes as a catalyst in on-property generation of sulfuric acid. Degreasers (chlorinated solvents) and metals were also chemicals of concern. SoundEarth’s technical support included reviewing the feasibility of installing the first reactive iron wall that utilized EnviroMetal’s patented technology to remediate chlorinated solvents and their degradation products in groundwater. In addition, SoundEarth provided an engineering cost estimate for the remediation of contaminated soil beneath the building (should future land use change) and of dense nonaqueous-phase liquids (DNAPLs) present along the downgradient edge of the site. SoundEarth also reviewed multiple rounds of groundwater and remedial system monitoring data, conducted oxygen-releasing compound injection events to hasten the natural biodegradation of solvents outside the influence of the reactive iron wall, assessed the area hydrogeology to evaluate fate and transport/contaminant migration to the adjacent Lake Washington Ship Canal, prepared a cleanup action plan to address impacted media remaining beneath the building slab, and performed an asbestos and lead-based paint survey of existing buildings.

Acids and bases had been used to etch window frames, and chlorinated solvents had been used in high volumes as a catalyst in on-property generation of sulfuric acid. Degreasers (chlorinated solvents) and metals were also chemicals of concern. SoundEarth’ technical support included reviewing the feasibility of installing the first reactive iron wall that utilized EnviroMetal’s patented technology to remediate chlorinated solvents and their degradation products in groundwater. In addition, SoundEarth provided an engineering cost estimate for the remediation of contaminated soil beneath the building (should future land use change) and of dense nonaqueous-phase liquids (DNAPLs) present along the downgradient edge of the site. SoundEarth also reviewed multiple rounds of groundwater and remedial system monitoring data, conducted oxygen-releasing compound injection events to hasten the natural biodegradation of solvents outside the influence of the reactive iron wall, assessed the area hydrogeology to evaluate fate and transport/contaminant migration to the adjacent Lake Washington Ship Canal, prepared a cleanup action plan to address impacted media remaining beneath the building slab, and performed an asbestos and lead-based paint survey of existing buildings.