| 1992/04/23 – Preliminary Assessment / Visual Site Inspections (PA/VSI) | PA/VSI to identify and assess the existence and likelihood of releases from areas of concern. | Download |
| 1992/08/19 – Air Use Permit | Michigan DEQ Air Use Permit application for plastic injection molding facility. | Download |
| 1996/04/04 – MDEQ Letter – UST Release at CMI-Tech Center | MDEQ letter confirming notification of UST release reported on March 29, 1996. | Download |
| 1996/04/15 – Confirmed Release Report – CMI-Tech Center | MDEQ report from gasoline UST release reported on March 29, 1996. | Download |
| 1996/07/02 – Leaking UST – Initial Assessment Report | Initial assessment report for the UST release discovered on March 28, 1996. | Download |
| 1997/04/03 – Closure Assessment Report | Closure report for the UST release discovered on March 28, 1996. | Download |
| 1998/02/04 – MDEQ Letter – Audit of Corrective Actions | MDEQ audit of corrective actions for the UST release reported on March 28, 1996. | Download |
| 2005/05/04 – PCE Completion Summary | MDEQ air permit compliance investigation report. | Download |
| 2008/05/30 – MDEQ Letter – USTs at CMI Tech Center | MDEQ letter requesting proof of financial responsibility for USTs. | Download |
| 2008/08/13 – Suspected Release Report – CMI-Tech Center | MDEQ report from gasoline and diesel UST releases reported on August 12, 2008. | Download |
| 2008/08/27 – ECT (Environmental Consulting) Letter to MDEQ – Underground Storage Tank System Site Assessment Report | Assessment report for removal of two USTs on July 8, 2008. | Download |
| 2008/08/29 – UST Site Assessment Report | MDEQ closure form for two USTs removed on July 28, 2008. | Download |
| 2008/10/29 – MDEQ Memo | MDEQ memo regarding closure following UST removals. | Download |
| 2013/04/15 – Acknowledgement of Receipt of BEA | MDEQ letter of receipt of December 5, 2012 Baseline Environmental Assessment. | Download |
| 2015/02/25 – LARA MDEQ Email | Licensing and Regulatory Affairs (LARA) request to close site evaluations to MDEQ. | Download |
| 2015/12/17 – LARA Letter to Hayes Lemmerz | Letter noting cancellation of suspected release entered on August 12, 2008. | Download |
| 2016/06/17 – Baseline Environmental Assessment – PM Environmental | June 17, 2016 Baseline Environmental Assessment of the Former Ethyl Corp Property. | Download |
| 2016/08/29 – Acknowledgement of Receipt of BEA | MDEQ letter of receipt of June 17, 2016 Baseline Environmental Assessment. | Download |
| 2019/06/18 – Acknowledgement of Receipt of BEA | MDEQ letter of receipt of May 24, 2019 Baseline Environmental Assessment. | Download |
| 2021/09/21 – RCRA Corrective Actions – Description of Current Conditions and Interim Measures Report | 2021 ATC RCRA Corrective Action Report submitted to MDEQ. | Download |
| 2022/02/17 – RCRA Corrective Action – Facility Investigation Workplan | 2022 Atlas RCRA Corrective Action Report Submitted to MDEQ. | Download |
| 2022/04/19 – RCRA Interim Work Plan Investigation Report – Eastern Site Boundary | 2022 Atlas RCRA Corrective Action Report Submitted to MDEQ. | Download |
| 2022/06/23 – Comment Letter – RCRA Interim Work Plan Investigation Report – Eastern Site Boundary | Michigan EGLE comments to April 19, 2022 Interim Work Plan Investigation Report. | Download |
| 2022/07/07 – Comment Letter – RCRA Corrective Action Facility Investigation Work Plan | Michigan EGLE comments to February 7, 2022 Corrective Action Facility Investigation Workplan Report. | Download |
| 2022/08/16 – Response to EGLE Comments and Addendum to the RCRA Interim Work Plan Investigation Report – Eastern Site Boundary | TRC response to EGLE comments addendum to April 29, 2022, RCRA Interim Workplan Report. | Download |
| 2022/09/07 – Revised RCRA Corrective Action Facility Investigation Work Plan Report | 2022 TRC revised RCRA Correction Action Facility Workplan Report. | Download |
| 2022/10/13 – Conditional Approval – RCRA Corrective Action Facility Investigation Work Plan | EGLE 2022 EGLE conditional approval and response to comments. | Download |
| 2022/10/17 – Work Plan Conditional Approval – Response to Comments and Addendum to the RCRA Interim Work Plan Investigation Report – Eastern Site Boundary | 2022 EGLE conditional approval and response to comments. | Download |
| 2023/04/03 – Continued Eastern Boundary Investigation Report | 2023 TRC Investigation Report submitted to EGLE. | Download |
| 2023/06/23 – Conditional Approval – Continued Eastern Boundary Investigation Report | 2023 EGLE conditional approval and response to comments. | Download |
| 2023/07/07 – Southern Area Investigation Report | 2023 TRC Southern Area Investigation Report submitted to EGLE. | Download |