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Updates

2023 Fourth Quarter Update (October - December)

  • Construction of the Phase II Trench as part of the Perimeter Groundwater Control System continued, including installation of infrastructure and storm water controls.  

  • Routine operation, monitoring and maintenance of the Vault sumps, site source control systems, and Pilot Trench groundwater collection systems were conducted.

  • Monthly oil recovery and disposal from the AOI-8 area.

  • Progress Report 85 covering activities from April through September 2023 was submitted to U.S.EPA.

  • GHD conducted routine monitoring and maintenance of the East Plant Cover System.

  • Quarterly groundwater level monitoring was conducted in September and November.

  • Semi-annual EI CA750 groundwater sampling was conducted in November.

2023 Third Quarter Update (July-September)

  • Construction of the Phase II Perimeter Groundwater Collection System continued, including the following:

    • Trenching machine operations were completed in August.

    • Installation of sheet piling and placement of grout on bottom of trench was completed in September.

    • Installation of trench infrastructure, including perforated conveyance pipe and Wet Well #5 began.

  • Routine operation, monitoring and maintenance of the Vault sumps, site source control systems, and pilot trench groundwater collection systems were conducted during the quarter.

  • Monthly oil recovery and disposal from the AOI-8 area was conducted during the quarter.

  • Routine monitoring and maintenance of the East Plant Cover System was conducted during the quarter.

  • 2022 Annual Vault Report was submitted to U.S. EPA.

  • Quarterly groundwater level monitoring was conducted in August.

2023 Second Quarter Update (April-June)

  • Construction of the Phase II Perimeter Groundwater Collection System continued, including the following:

    • Completed platform for trenching machine.

    • Conducted of geophysical testing to demonstrate depth to competent bedrock and submission of the results in a Phase II Trench Geophysics memo to U.S. EPA in May.

    • Trenching machine operations began in May.

    • Installation of sheet piling and placement of grout on bottom of trench began in June.

  • Routine operation, monitoring and maintenance of the Vault sumps, site source control systems, and pilot trench groundwater collection systems were conducted during the quarter.

  • Monthly oil recovery and disposal from the AOI-8 area was conducted during the quarter.

  • Memo describing the results of the former clarifier area NAPL recoverability evaluation was submitted to U.S. EPA.

  • Progress Report 84 covering activities from October 2022 through March 2023 was submitted to U.S.EPA.

  • Routine monitoring and maintenance of the East Plant Cover System was conducted during the quarter.

  • Quarterly groundwater level monitoring was conducted in May.

  • GHD conducted the semi-annual cap inspection in May.

  • Pilot Trench Performance Monitoring Report was submitted to U.S. EPA.

2023 First Quarter Update (January-March)

  • Routine operation, monitoring and maintenance of the Vault sumps, site source control systems, and pilot trench groundwater collection systems were conducted during the quarter.

  • Monthly oil recovery and disposal from the AOI-8 area was conducted during the quarter.

  • Quarterly groundwater level monitoring was conducted in February 2023.

  • Groundwater sampling in support of the Pilot Trench performance monitoring was conducted in January 2023.

  • Project Fact Sheet 49 was distributed in January 2023.

  • City of Bedford provided approval of the Construction Stormwater Pollution Prevention Plan.

  • U.S. FWS provided a letter confirming the Phase II Perimeter Groundwater Trench Collection System construction was not likely to adversely affect the Indiana Bat.

  • Sevenson Environmental Services mobilized to the Site to begin construction.

  • GM and U.S. EPA met at U.S.EPA’s Chicago offices to review project progress.

 
2022 Fourth Quarter Update (October-December)

  • Routine operation, monitoring and maintenance of the Vault sumps, site source control systems, and pilot trench groundwater collection systems were conducted during the quarter.

  • Monthly oil recovery and disposal from the AOI-8 area was conducted during the quarter.

  • Routine monitoring and maintenance of the East Plant Cover System was conducted during the quarter.

  • Progress Report 83 covering activities from April through September 2022 was submitted to U.S.EPA.

  • A memo providing the results of the First Half 2022 EI CA750 sampling event was provided to U.S. EPA in July 2022.

  • Quarterly groundwater level monitoring was conducted in November 2022.

  • Semi-annual EI CA750 groundwater sampling was conducted in November/December 2022.

  • Construction Stormwater Pollution Prevention Plan prepared in accordance with IIDEM’s Construction Stormwater Plan General Permit, was submitted to the City of Bedford.

  • Sevenson Environmental Services was selected to construction the Phase II Perimeter Groundwater Trench Collection System

  • A request was submitted to U.S. FWS to review the Phase II Perimeter Groundwater Trench Collection System construction plans to confirm activities was not likely to adversely affect the Indiana Bat.

 
2022 Third Quarter Update (July-September)

  • Routine operation, monitoring and maintenance of the Vault sumps, site source control systems, and pilot trench groundwater collection systems were conducted during the quarter.

  • Monthly oil recovery and disposal from the AOI-8 area was conducted during the quarter.

  • Routine monitoring and maintenance of the East Plant Cover System was conducted during the quarter.

  • A memo (revised) summarizing the results of the Second Half 2021 EI CA750 sampling event was provided to U.S. EPA in July 2022.

  • The 2021 TSCA Annual Vault Report was submitted to U.S. EPA in July 2022.

  • The Phase II Perimeter Groundwater Trench Collection System design report was submitted to U.S. EPA in July 2022.

  • Bid documents for the Phase II Perimeter Groundwater Trench Collection System construction were issued in August 2022.

  • Groundwater sampling in support of the Pilot Trench performance monitoring was conducted in August 2022.

  • Quarterly groundwater level monitoring was conducted in September 2022.

  • A public meeting was held in September 2022.

  • GM and U.S. EPA held the annual project update meeting in September 2022.

  
2022 Second Quarter Update (April-June)

  • Routine operation, monitoring and maintenance of the Vault sumps, site source control systems, and pilot trench groundwater collection systems were conducted during the quarter.

  • Monthly oil recovery and disposal from the AOI-8 area was conducted during the quarter.

  • Routine monitoring and maintenance of the East Plant Cover System was conducted during the quarter.

  • Quarterly groundwater level monitoring was conducted in May 2022.

  • Progress Report 82 covering activities from October 2021 through March 2022 was submitted to U.S.EPA. in April 2022.

  • Clarifier Aera Oil Recovery testing was conducted in April/May 2022.

  • A memo providing the results of the Second Half 2021 EI CA750 sampling event was provided to U.S. EPA in April 2022.

  • Semi-annual EI CA750 groundwater sampling was conducted in May 2022.

  • The Residential Well Survey Work Plan was submitted to U.S. EPA in June 2022.

  

2022 First Quarter Update (January-March)

 

  • Conference calls were held with U.S.EPA and IDEM during the quarter to discuss items related to the project.

  • Monthly oil recovery from the AOI-8 area was conducted monthly. 

  • The Groundwater Treatment Plant (GWTP) collected and treated water from the Pilot Trench, Vault sumps, and wet wells throughout the quarter.

  • The final 2020 Annual Vault Report was submitted to U.S.EPA in January 2022.

  • A memorandum providing responses to U.S.EPA comments on the Phase II Perimeter Groundwater Trench Collection System Design Report was submitted to U.S. EPA in January 2022. 

  • U.S.EPA provided comments on the Corrective Measures Proposal and the Long Term Operation, Monitoring and Maintenance Plan in February 2022.

  • U.S.EPA provided additional comments on the Phase II Perimeter Groundwater Trench Collection System Design Report in February 2022.

  • GM transmitted U.S.EPA and IDEM approval of the construction reports and termination of access agreement by certified mail in February 2022. 

  • Quarterly groundwater level monitoring was conducted in February 2022.

  • Responses to U.S.EPA additional comments on the Phase II Perimeter Groundwater Trench Collection System Design Report were submitted to U.S.EPA in March 2022.

2021 Fourth Quarter Update (October-December)

  • Monthly project update communication with U.S.EPA and IDEM was conducted during the quarter. 

  • Monthly oil recovery from the AOI-8 area was conducted during the quarter. 

  • Pilot Trench performance monitoring was conducted throughout the quarter, including the initiation of the far field dye tracer study.

  • Progress Report 81, covering activities from April 2021 through September 2021 was submitted to U.S.EPA in October 2021.

  • Memorandum providing a summary of the catch basin repair was submitted to U.S. EPA in October 2021.

  • Annual project update meeting was held in October 2021.

  • Semi-annual groundwater monitoring was conducted during November 2021.

  • Letter summarizing the cores stored on-Site was submitted to U.S.EPA in December 2021.

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