Genesee County, Flint, City of Flint Landfill at Bishop International Airport

Updated: March 18, 2020

Flint Bishop International Airport Landfill PFAS Investgation map

Background

This site is located at G-3425 West Bristol Road in Flint. It is a landfill located on the Bishop Airport property. The city of Flint reportedly operated the landfill from 1966 to 1975. There are existing groundwater monitoring wells at the landfill that were installed by the city of Flint in September of 2011 as part of an environmental assessment conducted by the city. Due to the existence of the former landfill and its location on the Airport property, it was determined that groundwater samples should be collected and analyzed for PFAS.

The airport is located along Swartz Creek. Areas near the airport appear to be serviced by private wells. There is currently no indication of impact to the deeper regional drinking water aquifer, however, future investigations will evaluate this drinking water pathway to ensure it is protected.

Recent Accomplishments

  • EGLE attended the August 19, 2019 Flint Township Board meeting to present the findings of the recent EGLE investigation.

Next Steps

  • EGLE is currently working to evaluate site liability and financial viability.
  • Following completion of hte financial viability analysis, work will include evaluating the new data and the risk posed by the site.
  • EGLE will continue to coordinate with multiple local and state agency partners at the site as necessary.

Residential Well Testing/Alternate Water Information

  • Areas near the airport appear to be serviced by private wells. There is currently no indication of impact to the deeper regional drinking water aquifer, however, future investigations will evaluate this drinking water pathway to ensure it is protected.
  • On March 8, 2019, EGLE did sample a shallow well of a homeowner near the airport. Results were Non-Detect for Total Tested PFAS.
  • For additional information on residential well testing and results, visit the Frequently Asked Questions.
  • EGLE has sampled all municipal water supplies for PFAS. The city of Flint purchases water from the Great Lakes Water Authority (GLWA). View the results for GLWA here.

Upcoming Community Engagement

  • None scheduled at this time.
Sampling: PFOS and PFOA Only

Type of Sample

Date Sampled

Number of Samples

Number of Results Received

Number of Non-detects

Number of Detections Below Standard*

Number of Detections Greater Than Standard*

Groundwater

Oct 2018 - Jun 2019 9 9 4 2 3
Residential Drinking Wells Mar 8, 2019 1 1 1 0 0
Cumulative
 
10 10 5 2 3



*Groundwater results are compared to EGLE Part 201 Criteria of 70 ppt PFOS+PFOA.
*Residential well results are compared to the USEPA Lifetime Health Advisory Level of 70 ppt PFOS+PFOA.

Sampling notes

  • Other PFAS analytes were detected in samples. There are no federal or state standards for these analytes.

Historical Timeline

  • On October 16, 2018, the Michigan Department of Environment, Great Lakes, and Energy (EGLE) collected 6 groundwater samples on behalf of the city of Flint to analyze for PFAS. They were collected from the previously existing monitoring wells on the landfill.
  • On November 7, 2018, EGLE received the results from the groundwater sampling. The highest values were 810 ppt PFOS+PFOA, and 1,236 ppt total PFAS.
  • EGLE has started evaluating existing data to determine the nature of the regional groundwater aquifers.  Additionally, a more detailed evaluation of site liability is under review.  The Michigan Geological Survey submitted a report summarizing the existing regional geology and groundwater data for the Flint Bishop International Airport - Landfill location on February 8, 2019.
  • On February 27, 2019, a site meeting was held with BIAA and City of Flint officials to identify possible locations for monitor wells that will evaluate the deeper regional drinking water aquifer.
  • On March 4, 2019, EGLE presented information about the site at the Flint Twp., Board meeting.
  • On March 8, 2019, the Michigan Department of Environment, Great Lakes, and Energy (EGLE) and MDHHS presented at a Town Hall event held by Representatives John Cherry, Sheldon Neely, Sheryl Kennedy, and Tim Sneller at Mott Community College in Flint. View the presentation.
  • On March 8, 2019, EGLE sampled a shallow well of a homeowner.  Results were non-detect for PFAS compounds.
  • In a March 13, 2019 email, the BIAA concurred that the locations of the monitor wells proposed by EGLE to evaluate the bedrock aquifer were acceptable to their operations.
  • On May 10, 2019, EGLE has completed the installation of three deep aquifer monitor wells at the site.
  • On June 6, 2019, EGLE sampled the three wells that had been developed.
  • On July 1, 2019, EGLE received the analytical results for the three groundwater samples collected at the recently installed deep wells. All results were Non-Detect for all PFAS compounds.