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Techni-Comp (Port Huron, St. Clair County)

Techni-Comp (Port Huron, St. Clair County)

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

EGLE site lead

Cynthia Paslawski, PaslawskiC@Michigan.gov or 586-668-6433 

Waste Disposal Questions

Techni-Comp: 810-364-5460

Background

Techni-Comp, located at 4152 Dove Road, has been utilized as a composting site for over 20 years.  For an unknown number of years, the site accepted solid wastepaper sludge from E.B. Eddy Paper/Domtar Paper Company that contained PFAS.

Surface water sampling on and near the property exceeded water quality standards for PFOS and PFOA.  EGLE sampled groundwater in 2021 and results exceeded PFAS criteria. 

Domtar and EGLE reached a settlement agreement in June 2025, requiring the company to remove PFAS contaminated compost piles and sample sediments in the site’s drainage systems. Work began in October 2025 and was completed in December, with a total of 56,805.50 tons of PFAS contaminated compost material removed. Sediment sampling as required under the settlement agreement was finished in December 2025 and showed elevated PFAS levels in parts of the ditches and drains. In 2026, Domtar submitted its final report, and EGLE confirmed that all required settlement work had been completed.

Content posted May 2026.

Preview of the Techni-Comp PFAS site.

Site map

See an aerial view of the location of the site.

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RIDE: Remediation Information Data Exchange

Site files in RIDE

See additional files related to the site.

RIDE inventory information for Techni-Comp

Drinking water

In February and March 2022, Michigan Department of Health and Human Services (MDHHS) made calls and knocked on doors (left door hangers) at the homes EGLE had previously tried to obtain access to. Two residents agreed to have their drinking water sampled; both were non-detect (ND).

Although the drinking water results were ND, in January 2023 MDHHS made additional calls to residents and knocked on doors in effort to collect more drinking water samples.  Only one resident agreed to sampling which was also sampled in the previous year; the result was non-detect.

Anticipated activities

EGLE will continue to engage with Techni-Comp about their environmental obligations.

Historical timeline

    • In August 2021, EGLE conducted a subsurface investigation on the property which included drilling 11 borings and collecting shallow groundwater samples from six.  The site geology consists primarily of clay extending approximately 100 feet below ground surface, providing a natural barrier above the potable aquifer, though some shallow groundwater pockets exist.  Simultaneously, local officials identified six potential drinking water wells closest to the Techni-Comp site. EGLE conducted door-knocking and phone calls to attempt to obtain access to the six well owners.
    • On September 7, 2021, EGLE received the shallow groundwater sampling results.  The highest result was 170,000 ppt for PFOA compared to 8 ppt.  The laboratory had to dilute the groundwater samples due to elevated PFAS levels.
    • On November 3, 2021, MPART met virtually with local officials to discuss the site investigation and EGLE’s attempt to gain access to sample drinking water wells.  
    • On March 15 and 16, 2022 MDHHS obtained access to collect drinking water samples from two of the six identified drinking water wells.  The results were non-detect for PFAS for both residents.
    • In 2023 – 2024, EGLE took legal action against Domtar/E.B. Eddy Paper for transporting PFAS containing paper waste from the Port Huron Mill to the Techni-Comp site for composting.
    • The settlement became final in June 2025. Under its terms, Domtar was required to remove all compost piles containing PFAS contaminated paper waste and to sample sediments within the site’s ditches and drainage systems for PFAS.
    • In October 2025, Domtar began work at the site and completed the work in December.  A total of 56,805.50 tons of compost material was removed from the site.
    • In December 2025, sediment sampling was completed and results show elevated PFAS concentrations in portions of the ditches and drains.
    • In 2026, Domtar submitted their final report and EGLE confirmed that all required work has been completed by Domtar.

    Sampling Results Summary

    Type of Sample

    Date Sampled (or Range)

    Number of Sample Results Received

    Number of Samples above Criteria

    Groundwater Monitoring Wells

    		 August 23-24, 2021 6 6
    Surface Water November 21, 2019 6 6
    Residential Wells March 2022 2 0
    * Residential well and groundwater monitoring well results are compared to EGLE Part 201 criteria for 7 PFAS compounds effective 12/21/2020:  PFOS (16 ppt), PFOA (8 ppt), PFNA (6 ppt), PFHxS (51 ppt), PFHxA (400,000 ppt), PFBS (420 ppt), and HFPO-DA (370 ppt).
    * Surface water samples are compared to Rule 57 non-drinking water values of 12 ppt for PFOS and 12,000 ppt for PFOA.