Skip to main content

Hoff Industries (Grand Rapids, Kent County)

EGLE Site Lead: Jason Poll, PollJ@Michigan.gov or 616-446-1263. Webpage last updated April 13, 2020.

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. 

Hoff Industries PFAS Results Map

Recent Accomplishments

Next Steps

  • A Request for services to collect soil samples has been submitted to the Geological Services Section. 

Residential Well Testing/Alternate Water Information

  • 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. 

Upcoming Community Engagement

  • None scheduled at this time.

Sampling Results Summary: PFOS and PFOA Only 

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. 

Sampling Notes

  • N/A
 

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.