This spring, a series of environmental site assessments were performed for a property at 3344 Highway 149/Dodd Road (Eagan Office Warehouse) to investigate soil conditions, at the direction of the property owner.
Soil samples in each of the assessments returned lead results in excess of the commercial/industrial soil reference value (SRV) and residential SRV. SRVs are a screening tool that may be used to evaluate potential human health risks from soil exposure.
As a result, a response action plan was written by a third-party environmental consultant hired by the property owner in May 2020 detailing excavation work to be performed on the site. Based on the results of the remedial investigation, approximately 0.40 acres of soil to a depth of 6 inches was proposed for excavation. Excavation of the lead-impacted soils began in May 2020 and was completed in June 2020. In May 2020, the 3344 Highway 149/Dodd Road property entered into the MPCA’s voluntary cleanup program.
Because lead-impacted soils were found at the 3344 Highway 149/Dodd Road property above the residential/recreational SRVs in areas adjacent to the Burr Oaks neighborhood, Gopher Resource will be sampling residential soils in the neighborhood for lead. A work plan has been developed by Gopher Resource and approved by the MPCA that details the work to be completed. Soil samples will be collected from the residential properties that are directly adjacent to the 3344 Highway 149/Dodd Road property by a third-party environmental consultant hired by Gopher Resource. These samples will be analyzed for lead.
If the results of the soil sampling indicate levels above the residential SRV, a cleanup plan will be developed to excavate the impacted soils.
For more information: Lead in soil (Minnesota Department of Health)
Gopher Resource is a manufacturing facility that produces refined alloys through the smelting and refining of spent lead-acid batteries and other lead bearing materials. Gopher Resource has an active Resource Conservation and Recovery Act (RCRA) Hazardous Waste Storage Facility Permit.
Emissions at the Gopher Resource facility, including lead emissions, are regulated under an air emissions permit, which is a legal document that describes the requirements that a facility must meet for federal and state air quality regulations. Any facility that emits air pollutants above certain levels is required to have an air permit.
A 1992 study by Dakota County evaluated soil near the Gopher Resource facility to determine if there were any historic impacts of lead to soil in the area. Four soil samples were collected from the Burr Oaks neighborhood northeast of the Gopher Resource facility. Lead values from these soil samples ranged from 58 milligrams per kilogram (mg/kg) to 210 mg/kg and were all below the lead residential/recreational soil reference value (SRV) of 300 mg/kg.
Minnesota Pollution Control Agency