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MAHLE Engine Components, USA, Inc. - Former Harvey Street Muskegon Plant (Muskegon, Muskegon County)

EGLE Site Lead: Peter VanHeest, VanHeestP@Michigan.gov. Webpage last updated January 26, 2021.

Background

MAHLE Engine Components, USA, Inc. – Former Harvey Street Muskegon Plant is located at 2051 South Harvey Street in Muskegon. The main activity at this plant was the production of engine parts, which included plating. There was a historic release of PFAS prior to 2011 from former plating operations to the groundwater.

A wetland associated with Little Black Creek and Barney Creek is approximately 750 feet down-gradient of the closest impacted groundwater monitoring well. 

Former MAHLE Area Map

Recent Accomplishments

  • In July 2020, MAHLE drilled and sampled the groundwater in three vertical aquifer profile borings and three monitoring wells to further delineate the PFAS contamination in the groundwater.
  • On November 18, 2020 EGLE received the sampling results from the July 2020 sampling event.  The highest concentration of PFOA detected in one of the new vertical aquifer profile borings was 210 ppt.
  • In December 2020, MAHLE and the Michigan Department of Environment, Great Lakes, and Energy (EGLE) met to discuss the needed next steps for the investigation.

Next Steps

  • Based upon the results of the July 2020 sampling, MAHLE is planning for an additional phase of groundwater sampling to further understand the extent of the PFAS contamination in the groundwater.  EGLE will continue to provide regulatory oversight.

Residential Well Testing/Alternate Water Information

  • Properties in the immediate area of the MAHLE site are serviced by municipal water from the city of Muskegon.
  • MAHLE has notified down-gradient properties and is confirming that no drinking water wells are located down-gradient.
  • The Michigan Department of Environment, Great Lakes, and Energy (EGLE) has sampled all municipal water supplies for PFAS. View the results for the city of Muskegon.

Upcoming Community Engagement

  • None scheduled 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

July 2020 15 6

*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.
  • Other PFAS analytes were detected in samples. There are no federal or state standards for these analytes. Samples were collected by the liable party. 

Historical Timeline

    • In September 2018, MAHLE sampled 7 groundwater monitoring wells located on the former MAHLE Harvey Street Muskegon Plant property. The highest result was 946.75 ppt PFOS+PFOA and 4,737.8 ppt Total Tested PFAS.
    • On October 22, 2018, MAHLE sent Notices of Migration to down-gradient property owners to notify them of contamination moving off-site. Public Health Muskegon Count was also sent copies of the Notices of Migration. The Notices contained a data map with PFOA concentrations depicted and groundwater flow direction information.
    • In November 2018, MAHLE sampled 11 groundwater monitoring wells located on the southern portion of the MAHLE Harvey Street Muskegon Plant property and on the adjacent property to the south.
    • On January 14, 2019, the Michigan Department of Environment, Great Lakes, and Energy (EGLE) received the results from the November 2018 groundwater sampling. The highest result was 746.2 ppt PFOS+PFOA and 73,121.4 ppt Total Tested PFAS.
    • On January 23, 2019, MAHLE sent an additional Notice of Migration to an additional property owner.
    • On February 7, 2019, EGLE met with MAHLE to discuss the next steps for delineating the contamination.
    • In March 2019, MAHLE completed an additional PFAS sampling event of existing monitoring wells. Results are similar to the previous two sample events. MAHLE has confirmed that nearby properties are serviced by municipal water. MAHLE also conducted a drive-by survey to confirm that wells are not located in the area.
    • On May 9, 2019, EGLE received the March 2019 groundwater sampling results.
    • In May 2019, MAHLE sampled surface water and groundwater in streambeds to evaluate if contaminated groundwater is venting to downgradient streams.
    • On July 12, 2019, EGLE received the results from MAHLE’s May surface water sampling. No exceedances of Rule 57 surface water quality values were detected in these samples.

    Historical Sampling Chart: Data is reflective of criteria prior to August 3, 2020,  PFOS and PFOA Only

    This chart reflects data received prior to August 3, 2020.

    Type of Sample

    Date Sampled (or Range)

    Number of Samples

    Number of Results Received

    Number of Non-Detects  Number Between Non-detect and Standard*  Number Greater Than or Equal to Standard 

    Monitoring Wells

    September 2018 - Present 68 68 0 47 21
    Surface Water May 2019 3 3 0 3 0
     Cumulative   71 71 0 50 21

    *Groundwater results are compared to EGLE Part 201 Criteria of 70 ppt PFOS+PFOA.
    *Surface water results are compared to Rule 57 surface water quality values of 12 ppt PFOS and 12,000 ppt PFOA.