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GM Powertrain Bay City (Bay City, Bay County)

EGLE Site Lead: Melissa Yuvan, YuvanM@Michigan.gov or 989-891-6087. Webpage last updated March 8, 2021.

Background

GM Powertrain Bay City, located at 100 Fitzgerald Street in Bay City, is an active automotive manufacturing facility that has been in operation since the early 1900's.  Prior on-site operations included chrome, copper and nickel plating, which are activities found to be associated with PFAS contamination. As a result, EGLE requested the responsible party (GM, LLC) to sample several on-site monitoring wells for PFAS analysis.

The GM Powertrain facility is located directly adjacent to the Saginaw River.  The groundwater flow direction of the site is north toward the river.

GM Powertrain Bay City Map

Recent Accomplishments

  • MPART hosted a series of regional webinars to educate the public on the launch of investigations into sites with PFAS contamination exceeding the state's new PFAS clean-up standards. A webinar for this site was held on September 16, 2020.

Next Steps

  • EGLE anticipates asking GM LLC for additional sampling to further evaluate the contamination.

Residential Well Testing/Alternate Water Information

  • The surrounding area is connected to municipal drinking water.

Upcoming Community Engagement

  • None at this time.

Sampling Results Summary

Type of Sample

Date Sampled
(or range)

Number of Sample Results Received

Number of Samples Above Criteria*

Groundwater Monitoring Wells June 12, 2019 6 2

* 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

  • None at this time. 

Historical Timeline

    • On June 12, 2019, upon request by EGLE, GM, LLC had their consultant (GHD) sample 6 on-site monitoring wells for PFAS.  
    • On July 19, 2019, EGLE received the results from the June sampling event. One well (MW406S) had a PFOA concentration of 21 ppt and one well (LMW6S) had a PFOS concentration of 24 ppt.
    • MPART hosted a series of regional webinars to educate the public on the launch of investigations into sites with PFAS contamination exceeding the state's new PFAS clean-up standards. A webinar for this site was held on September 16, 2020.