Genesee County, Davison, Richfield Landfill

Aerial Map of Richfield Landfill, Davison, MichiganUpdated: July 17, 2020

Background

The Richfield Landfill is located at 11145 East Mount Morris Road in Genesee County. In September 2012, Richfield Landfill Inc., filed for Chapter 11 Bankruptcy protection, which converted to a Chapter 7 (liquidation) bankruptcy in February 2013.  Upon conversion to Chapter 7, landfill operations ceased, and Richfield Landfill Inc., abandoned the landfill. The Michigan Department of Environment, Great Lakes, and Energy (EGLE) has been maintaining the site since it was abandoned by Richfield Landfill Inc., in 2013. Landfill Cells 1, 2, and 3 are believed to be structurally sound but require leachate removal and normal maintenance activities. The old fill area was constructed (per the regulations at the time) without a leachate collection system.

Historical groundwater monitoring indicates that the old fill portion of the landfill caused a groundwater impact in the shallow aquifer.  The shallow aquifer flows south toward, and discharges into, the Holloway Reservoir (Flint River).  A remediation system (groundwater extraction with trucking to a waste water treatment plant), mixing zone authorization, provision of municipal water and institutional controls were/are used to protect human health and the environment.

Recent Accomplishments

  • On January 24, 2020, EGLE participated in a stakeholder’s meeting at Richfield Township Hall with State Representative Sheryl Kennedy, other state and local officials, and residents to discuss the results of recent groundwater sampling, budget, funding, and future plans for the site.
  • In May 2020, EGLE began design work for the addition of an engineered clay cap to Cell 1 and the old fill area. This cap will reduce leachate production and decrease contaminant concentrations in groundwater.

Next Steps

  • Evaluate new PFAS data as it becomes available.
  • EGLE continues to evaluate next steps, however, Richfield Landfill Inc., has gone bankrupt and there is no viable liable party at this time and available financial assurance is nearly depleted.
  • EGLE will put the capping project up for bidding and select a contractor for its construction, with a goal of completing the project by the end of Fall, 2020.

Residential Well Testing/Alternate Water Information

  • Three select residential drinking water wells were sampled to evaluate potential PFAS impacts.  All three residential wells were non-detect for total PFAS.  There is no known impact to the drinking water aquifer which is lower than and hydraulically separated from the upper impacted aquifer.  On-site groundwater monitoring wells will continue to be monitored to evaluate PFAS plume concentrations and configuration in the upper aquifer.
  • For additional information on residential well testing and results, visit the Frequently Asked Questions.
  • EGLE has sampled all municipal water supplies for PFAS. View the results for the city of Davison.

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 Between Non-detect and standard*

Number of > Standard

Drinking Water (Residential) Oct 11, 2018 3 3 3 0 0
Groundwater Apr 19, 2018 - Present 9 9 2 4 3
Cumulative   12 12 5 4 3

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

Sampling notes

  • Other PFAS analytes were detected in samples. There are no federal or state standards for these analytes.
  • A landfill leachate PFAS sample was collected on April 19, 2018, to assist in evaluating leachate treatment/disposal options.  Leachate sample results are not indicative of concentrations that are being released to the environment.

Historical Timeline

  • On April 19, 2018, one leachate PFAS sample and two groundwater PFAS samples were collected at the site.
    • The leachate PFAS sample was taken to assist in evaluating leachate treatment/disposal options and is not indicative of concentrations that are being released to the environment.
    • The groundwater samples were taken to evaluate potential site related PFAS impacts. One sample (nearest the landfill) exceeded EGLE Part 201 Criteria of 70 ppt.The second sample (on property but closer to the property line) was below EGLE Part 201 Criteria.
  • On October 11, 2018, three residential well samples were collected near the site. The analytical results for total tested PFAS at all three sample locations was non-detect.
  • On November 19, 2018, EGLE attended a meeting with local leaders to discuss residential well PFAS sample results and to discuss site status and next steps.
  • On March 8, 2019 the Michigan Department of Environment, Great Lakes, and Energy (EGLE) attended a public meeting at Mott Community College. EGLE staff provided a presentation on PFAS, including updates on all the Flint-area PFAS sites.  This event was sponsored by Representatives John Cherry, Sheldon Neely, Sheryl Kennedy, and Tim Sneller.
  • During the week of November 11, 2019, EGLE’s contractor sampled select groundwater monitoring wells to monitor the stability of the PFAS impact and confirm plume delineation.
  • On January 5, 2020, EGLE received groundwater sampling results from select monitor wells, which confirmed plume delineation, and that the lower aquifer was uncontaminated.