In fall 2024, the EPA conducted a time-critical removal/soil cleanup action on residential properties within the Upper Columbia River site in and around the Northport area. In total, approximately 5,400 tons of contaminated soil were removed and transported for disposal.
EPA reviewed existing soil sampling data and identified properties with concentrations in soil that are above the removal action level of 200 mg/kg for lead and/or above 90 mg/kg for arsenic where children and/or women of childbearing age have unrestricted access to lead contaminated soil.
Fiscal Year 2023 federal Superfund tax funds were used for the 2024 soil cleanup action. The State of Washington contributed to this soil cleanup action by directly funding the disposal of contaminated soil.
