MGP SITE REMEDIATION
FORMER MGP SITE REMEDIATION
- Dredging of 8,900 cy of MGP tar-impacted sediment
- Dewatering and off-site transportation
- Water treatment filtration system and testing
- 100% compliant to NPDES permits
- Multiple stakeholder project involving the Michigan Department of Environmental Quality, Michigan Department of Natural Resources, and the City of Albion
Great Lakes E&I performed remediation services at this former manufactured gas plant (MGP) in Kalamazoo, providing removal and disposal of the impacted sediments. Great Lakes E&I’s assessment of the requirements identified some risks that were mitigated in the work approach, including potential for over-dredging which would increase dewatering, water treatment, and landfill costs. This was mitigated through a combination of vacuum and mechanical dredging systems which incorporated state-of-the-art on-board dredging controls and post-dredge monitoring equipment.
The North Eaton Street Bridge presented unique challenges to this project with limited available head room beneath the bridge creating access restrictions. Great Lakes E&I’s patented Sed-Vac system proved to be an effective dredging method to deal with the height restrictions of the bridge, and allowed for safe removal of material from utilities.
A diver was used when dredging near utility lines providing real-time observation and direction of the removal activities. Great Lakes E&I also used a diver during back filling operations around the utilities.Great Lakes E&I’s extensive experience providing remediation of the Kalamazoo River and other similar rivers led us to propose a change in the turbidity curtain layouts provided by the Client which provided a more effective design. Major elements of the work scope included:
- Dredging, stabilization, dewatering, waste transportation and waste disposal services for the targeted sediment
- Site restoration
- Installation of fish barriers and relocation of amphibious wildlife
- Suspended sediment controls, absorbent booms, and dust control
- Implementation of MOTs for public vehicle traffic and detours for pedestrians and cyclists
- Precision removal guided through use of tilt sensors and RTK/GPS