EGLE Site Lead

Larry Engelhart, EngelhartL@Michigan.gov or (989) 891-6946.

Background

The old Mt. Pleasant city dump/landfill is located at 1301 North Franklin Street. The property is owned by the city of Mt. Pleasant and within the boundaries of the Saginaw Chippewa Reservation. The site became a suspected source of PFAS after the city of Mt. Pleasant sampled water from clay tiles that drain near the dump and empty into the Chippewa River. (The tile/drain sampling results also revealed the drains were illicit discharges, which the city has since fixed). To confirm the dump as a source, two monitoring wells were installed at the edge of the landfill and sampled. Both groundwater well results were over PFAS criteria.

The Chippewa River is located adjacent to the facility.  While it is believed that groundwater flows toward the Chippewa River, additional monitoring wells will be installed in the near future to verify that.

Recent Accomplishments

  • On February 22, 2021, EGLE had a virtual meeting with the City of Mt. Pleasant DPW and Mannik Smith Group to discuss the December 22, 2020, report data; future investigations and schedules were also discussed.     
  • On April 16, 2021, EGLE received a signed contract with the City of Mt. Pleasant and Mannik Smith Group for additional investigations, including exploratory borings to evaluate the size of the landfill, survey monitoring well elevations, and collect groundwater samples.
  • On July 2, 2021, EGLE received an email indicating a preliminary report will be submitted to the City of Mt. Pleasant Department of Public Works and will be finalized soon after receipt.

Next Steps

  • EGLE will review the report from Mannik Smith Group when anticipated to be received in July 2021.    

Residential Well Testing/Alternate Water Information

  • Mannik Smith Group coordinated with the Central Michigan District Health Department (CMDHD) for information regarding drinking water wells nearby.  Further discussions will occur with Mt. Pleasant Department of Public Works and their Consultant. 

Upcoming Community Engagement

  • None scheduled at this time.

Sampling Results Summary

Type of SampleDate Sampled (or range)Number of Sample
Results Received
Number of Samples above
Criteria*
Groundwater Monitoring WellsApril 20, 2020 – Present137

*Residential well and groundwater monitoring well results are compared to EGLE Part 201 criteria for 7 PFAS compounds:  PFOS (16 ppt), PFOA (8 ppt), PFNA (6 ppt), PFHxS (51 ppt), PFHxA (400,000 ppt), PFBS (420 ppt), and HFPO-DA (370 ppt).

Sampling Notes

  • On August 3, 2020, new Part 201 Criteria went into effect.  Historical sampling data compared to Part 201 Criteria >70 is captured in the historical timeline below.
  • EGLE conducted recent fish tissue sampling in the Chippewa River adjacent to this site both upstream and downstream.  Results did not indicate a concern with regards to PFAS.

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