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Hoff Industries (Grand Rapids, Kent County)

Hoff Industries (Grand Rapids, Kent County)

Disclaimer: Web content may not be routinely updated on this page.

Please contact the Site Lead for the most up-to-date status of this site.

EGLE site lead

Jason Poll, PollJ@Michigan.gov or 616-446-1263.

Background

Hoff Industries was a former chrome plating facility located at 719 Prospect Avenue, NE. Operations ceased in 1990.  State funds were used to remove abandoned wastes, demolish the building, and investigate the extent of contamination. Based on the concentrations of volatile organic compounds detected in soil and groundwater, additional investigations were conducted in 2017, 2018, and 2019 to assess the volatilization to indoor air pathway. Due to former chrome plating operations, PFAS samples were collected from this site during the 2019 investigation.

Groundwater flow at the site is to the east. The Coldbrook Drain, an enclosed creek/storm drain, is immediately east of the site and flows to the northwest.

Content posted January 2022.

Hoff Industries PFAS Results Map

Site map

See an aerial view of the location of the site.

Expand the map

Drinking water

The area is served by municipal water. Kent County Health Department’s record search indicates there are no known water supply wells in the area.

Anticipated activities

No work is anticipated at this time.

Historical timeline

    • On November 7, 2019, EGLE’s contractor AKT Peerless, collected groundwater samples from four on-site monitoring wells.
    • On December 2, 2019, EGLE received the results from the November sampling event.  The highest PFOS + PFOA groundwater result was 5,924 ppt, collected from monitoring well RL-3. 

    • Historical Sampling Chart: data is reflective of criteria prior to August 3, 2020:
      PFOS + 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

      Groundwater

      		 November 2019 4 4 0 1 3
      Surface Water March 2020 3 3 2 0 1
      Cumulative 7 7 2 1 4
       

      *Groundwater results are compared to EGLE Part 201 Criteria of 70 ppt PFOS+PFOA.
      *Surface water samples are compared to Rule 57 non-drinking water values of 12 ppt for PFOS and 12,000 ppt for PFOA. 

    • On March 16, 2020, EGLE and the city of Grand Rapids collected surface water samples from the Coldbrook Drain. EGLE received the results on March 24, 2020. PFOS was detected in the downstream sample at 29 ppt.
    • On May 28, 2021, EGLE filed a Restrictive Covenant for the property prohibiting the installation of groundwater wells and limiting the property to nonresidential uses. The previous restrictive covenant was rescinded since it was not adequate to protect against future uses of the property based on investigation work that was conducted since it was originally filed in August 2010.
    • On December 20, 2021, EGLE completed State Project Termination documentation since no additional work is anticipated at this time.

    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.