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Cleanup at Fertilizer Manufacturer

Cleanup at Fertilizer Manufacturer

Farallon managed the investigation and cleanup of 52,000 cubic yards of soil with concentrations of arsenic, cadmium, chromium, copper, lead, manganese, and mercury exceeding site-specific cleanup levels on a 50-acre facility in Yakima, Washington. The source of the contamination was waste generated by a former fertilizer manufacturing facility that was spread via irrigation ditches.

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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.


Services Utilized

Feasibility Studies and Remedial System Design

Regulatory agencies often require studies, which are a useful first step in the design process. We conduct Feasibility Studies to evaluate the comparative effectiveness, practicality, timeliness, and costs for potential remedial...

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Remediation System Design and Operation

We also operate and maintain remediation systems at client sites. Our engineers rely on our extensive experience to monitor and optimize system performance and minimize the time to achieve cleanup goals. Among the remediation systems we...

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