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Wolf Five LLC, Former Wyckoff Steel Corporation Corrective Action


Jeremy Pepin

Wolf Five LLC (Wolf) is the current owner of the former Wyckoff Steel Corporation (Wyckoff Steel) site located at 1000 General Drive, Plymouth, Michigan.  Prior to Wyckoff Steel’s ownership, Ampco-Pittsburgh Corporation (Ampco) owned and operated the site from 1965 until 1987.  Both Wycoff Steel and Ampco finished cold drawn steel and operated hazardous treatment, storage, and disposal units that handled waste from their steel production activities.  Steel finishing operations were discontinued in 1990 and Wolf purchased the property in 2015.    

While under Ampco’s ownership, Ampco removed and disposed of contaminated soils and demonstrated having met Michigan’s residential cleanup criteria for the majority of the contamination at the site.  Groundwater contamination is still present at the site, but a restrictive covenant prohibiting use of the groundwater was implemented in 2006 and a groundwater monitoring system was installed that Ampco continues to operate and maintain today. Due to the restriction of groundwater use at the site it has received a limited residential closure designation.  A limited residential closure means that the institutional control measure, in this case the restrictive covenant prohibiting the use of the groundwater, is used to prevent exposure to the contamination.

Corrective Measures Implementation Work Plan

Pursuant to the 2015 Corrective Action Long Term Agreement (CALTA) between Wolf and EGLE, Wolf submitted a proposed Corrective Measures Implementation (CMI) Work Plan in September 2022. EGLE reviewed the CMI Work Plan and provided comments in January 2023.  Wolf submitted a revised CMI Work Plan providing for Wolf to:

  • Remove contaminated soil.
  • Redevelop the site.
  • Ensure that site contamination conditions and exposure pathways remain unchanged.
  • Ensure that the site redevelopment will in not prevent/ disrupt Ampco from operating and maintaining the groundwater monitoring system.

The CMI Work Plan is also available in hard copy for review at the following locations:

  • Lansing: EGLE, MMD, Constitution Hall, 525 West Allegan Street, Lansing, Michigan 48933 (contact Vickie Terry at or 517‑284-6546).
  • Warren: EGLE, MMD, Warren District Office, 27700 Donald Ct, Warren, MI 48092 (contact Jennifer Block at or 269‑370‑8527)
  • Plymouth: Plymouth District Library (Heather Pacheco,, reference desk 734-453-0750 - option 1)

Corrective Action

Environmental clean-up activity performed to address contamination resulting from hazardous waste treatment, storage and disposal facilities is referred to as "corrective action" in the hazardous waste regulations.  Hazardous waste treatment, storage and disposal facilities are required to submit corrective action plans to EGLE for review and approval.  The corrective action plans provide details on how the site owner(s) and/or operator(s) will investigate and clean-up the contamination to meet standards protective of human health and the environment.  Though the corrective action cleanup process varies from site to site, it typically includes an initial site assessment, site characterization, interim actions, evaluation of remedial alternatives, and implementation of the selected remedy.

Public Involvement

EGLE invites the community to comment on the CMI Work Plan. Comments can be submitted as follows:

  • Electronically: Jeremy Pepin at
  • Mail: EGLE, Materials Management Division; Hazardous Waste Section; P.O. Box 30241; Lansing, Michigan, 48909.

Comments should include the name, address, and email of the writer; a concise statement of the basis for the comment(s); and the supporting relevant facts upon which the comment(s) are based. Written comments must be postmarked no later than June 16, 2023, the end of the comment period. If requested before June 1, 2023, EGLE will schedule a formal public hearing to take formal verbal comment on the proposed, conditional approval of the CMI Work Plan.

Before issuing a final decision, EGLE will evaluate all comments received. Information regarding EGLE’s final decision on the CMI Work Plan will be provided to all persons who submit timely formal comments or are on the facility mailing list. EGLE will respond to all significant comments on the CMI Work Plan, and explain any changes made in response to the comments received.

Inspection Oversight

Please see EGLE's Waste Data System to view facility inspection and oversight data for the Wolf, Former Wyckoff Steel site.

How to Stay Connected

To be placed on the official Wolf facility mailing list to receive required notifications from both EGLE and Wolf, please send a written request to Jeremy Pepin, Environmental Engineer, at; or EGLE, MMD, P.O. Box 30241, Lansing, Michigan 48909‑7741.

Through your observations and reporting of activities of concern, you play a valuable role in helping the EGLE protect human health and the environment.  To file a complaint or share details about improper waste handling or disposal, contact EGLE through the Pollution Emergency Alerting System (PEAS) Hotline at 800-292-4706.