Cleanup at Fertilizer Manufacturer

The cleanup action was conducted under a Consent Decree with Ecology and included preparation of a Feasibility Study, a Compliance Monitoring Plan, an Engineering Design Report, and construction plans and specifications for soil excavation and construction of a containment area. The design documents included development of site-specific cleanup levels for metals in soil, groundwater modeling to confirm that the concentrations of metals in groundwater were static, and fate and transport modeling for selection of an on-site containment system. The cleanup action included excavation of soil with concentrations of one or more of the metals above cleanup levels and consolidation on the Site in a cell with an engineered cap suitable for placement of a paved roadway. The cleanup action also involved institutional controls, including scheduled inspection and maintenance and a Restrictive Covenant. The cleanup action successfully met the requirements of Ecology to protect human health and the environmental, and no further cleanup is required.