Kent County, Grand Rapids, Cottage Grove and Marshall Area

Updated: July 30, 2020

Cottage Grove Marshall Area PFAS Investigation Map DRAFT 20191023Background

The Cottage Grove and Marshall Area site includes the 800 block of Cottage Grove Street, SE and 1500 block of Marshall. Several metal plating operations have existed in this neighborhood from the 1960s to present day.

Based on information in the file, natural groundwater flow is to the southwest toward Silver Creek, which is in a below-grade culvert approximately 600 feet south of the investigation area. Investigations have also shown a westerly component to groundwater flow near the historic natural path of Silver Creek.

Recent Accomplishments

  • On July 30, 2020, EGLE hosted a conference call to discuss the preliminary findings of the groundwater sampling conducted at the Advance Plating & Finishing property located in the investigation area.  EGLE was not yet provided detailed laboratory analysis and insufficient information was available to determine the source of the PFAS identified previously. However, sampling confirmed that PFAS contamination extends to the east and south of the current investigation area.  Additional investigation is needed and EGLE awaits formal submittal of laboratory data.

Next Steps

  • A potential liable party will continue an investigation at their facility to assess the groundwater at that facility and elsewhere in the investigation area.
  • As funding and staff time become available, EGLE will develop an action plan to assess groundwater upgradient of this investigation area to determine whether other nearby potential sources are contributing to the contamination identified in the groundwater.

Residential Well Testing/Alternate Water Information

  • Surrounding residents/businesses are on municipal water from the city of Grand Rapids. There are no drinking water receptors in the current investigation area.

Upcoming Community Engagement

  • None scheduled at this time.
Sampling: PFOS and PFOA Only

Type of Sample

Date Sampled

# of Samples

# of Results Received

# of Non-detects

# Between Non-detect and standard*

# > Standard


May 30, 2019 1 1 0 0 1


  1 1 0 0 1

*Groundwater results are compared to EGLE Part 201 Criteria of 70 ppt PFOS+PFOA.

Sampling notes

  • None at this time.

Historical Timeline

  • On May 30, 2019, a single groundwater sample was collected from a temporary monitoring well on the southeast side of the property.
  • On July 17, 2019, EGLE received the results of the sample collected in May, which was PFOS + PFOA  of 1,410 ppt.
  • On September 20, 2019, EGLE sent a compliance communication to a potential liable party requesting history of PFAS use and additional investigation.
  • On October 8, 2019, EGLE staff met with a potential liable party to outline the need for further investigation in the area.
  • On November 8, 2019, EGLE received a report from the Kent County Health Department confirming that the businesses and residences in the area were connected to the municipal water supply.  EGLE worked with the city of Grand Rapids to corroborate this report and confirm several locations which did not have documentation in the Health Department’s file. In summary, there are no drinking water receptors in this investigation area.
  • On November 12, 2019, EGLE received a letter (dated October 31, 2019) which detailed the potential liable party’s intention to complete additional investigation activity in the area in January 2020. This letter also asserted that the company has not conducted plating operations that required the use of PFAS-containing products and attributed the presence of PFAS in the area to previous operators.
  • On January 27, 2020, the potential liable party reported that they have contracted with an environmental consulting firm to investigate the presence of PFAS in the subsurface near one or more of the potential source properties.
  • On March 23, 2020 EGLE had a conference call with potentially liable party’s environmental consultant to discuss possible investigation methods and preliminary extent. Reached an agreement that the consultant would develop and submit a formal work plan for review.
  • On July 9, 2020, EGLE received information from one potential liable party regarding the status of historical use information and ongoing research pertaining to soil and groundwater conditions and possible up-gradient sources of PFAS contamination.  Additional work remains underway and EGLE awaits analytical results from any recent sampling.