Shiawassee County, Owosso, Partz Corporation

Updated: July 17, 2020

Partz Corporation Monitoring Well PFAS Sample Locations Oct 2019Background

The Partz Corporation property is located at 1232 West Main Street, the location of a former plating operation that was destroyed by fire in December 1992. The fire resulted in fluids from approximately 24 plating tanks used in operations released to the basement floor and/or environment. In 1993, EGLE (formerly the DEQ) removed and disposed of non-hazardous debris from the fire and stabilized the property. The U.S. EPA followed EGLE’s actions with the removal of all hazardous waste containers, liquids, and sludge. The property has been vacant since the 1992 fire and was purchased in 2018 by a local resident.

The Shiawassee River is located approximately 850 feet northeast of the property. The Chipman Drain, a closed storm water drainage system, crosses the property and discharges to the Shiawassee River. The city of Owosso sanitary sewer system also crosses the property.  Groundwater flows to the north towards the Shiawassee River. 

Recent Accomplishments

  • On June 17 and 18, 2020, a third round  of sampling of the eleven (11) monitoring wells, the Chipman Drain, and sanitary sewer was conducted.    
  • A work plan for off-site monitoring wells has been developed to determine off-site migration of contaminants.  Additional wells will be installed to the north and east of the property.

Next Steps

  • The results of the June 17 and 18, 2020 third round of samples are expected to be received in July 2020.
  • The installation of seven additional monitoring wells will be installed on the adjacent properties to the north and east.  Access to those properties is currently being pursued.  The installation and sampling of the additional wells is expected to be completed in August 2020.  

Residential Well Testing/Alternate Water Information

  • The property and surrounding area are serviced by municipal water; drinking water in the area is municipal from the city of Owosso.
  • 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 Owosso. 

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

Monitoring Wells

Sep 5, 2018 - Present 36 25 13 4 8
Storm Water / Surface Water Jan, Mar, Jun 2020 10 7 6 1 0
Sanitary Sewer Jan, Mar, Jun 2020 6 4 4 0 0


  52 36 23 5 8

*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).

Sampling notes

  • None at this time.

Historical Timeline

  • On September 5, 2019, EGLE’s contractor, The Mannik Smith Group, collected 3 groundwater samples from recently installed on-site monitoring wells.
  • On September 27, 2019, EGLE received the results for the 3 samples collected.  Two of the samples collected were above Part 201 Criteria; the highest PFOS+PFOA groundwater result was 449 ppt. EGLE notified Shiawassee County Health Department.
  • On October 4, 2019, the city of Owosso was notified of the sampling results.
  • October 25, 2019, the Shiawassee County Drain Commission and Friends of the Shiawassee River were notified of the sampling results.
  • On December 17-19, 2019, eight (8) additional monitoring wells were installed on the Partz Corporation property. 
  • On January 7-9, 2020, sampling occurred of the existing monitoring wells, newly installed monitoring wells, sanitary sewer system, and storm water samples from Chipman Drain. 
  • On January 29, 2020, PFAS results received from monitoring wells, sanitary sewer system, and Chipman Drain.  The results showed PFAS in three monitoring wells above the Part 201 Criteria; the highest PFOS + PFOA was 522 ppt.  No PFAS compounds were detected in the sanitary or Chipman Drain samples.
  • On March 31, 2020, a second round of sampling of the eleven (11) monitoring wells, the Chipman Drain, and sanitary sewer was conducted.   In addition, a sample was collected from the outfall of the Chipman Drain to the Shiawassee River. 
  • On April 14, 2020, EGLE received the results from samples collected in March 2020.  The results showed PFOS and/or PFOA contamination in three of the monitoring wells above the Part 201 Cleanup Criteria.  The highest PFOA + PFOS detected was 560 ppt.  The results also showed contaminated groundwater at the property boundary suggesting contamination has migrated off the property.