MGP SITE REMEDIATION
Great Lakes E&I has extensive experience with the remediation of complex Manufactured Gas Plant (MGP) sites including polyaromatic hydrocarbons (PAHs), semi-volatile organic compounds (SVOCs), heavy metals, and asbestos. Our management team understands the logistics and project controls related to odor and water management required to successfully complete these projects while performing work in urban environments involving numerous stakeholders. Our company owned specialty equipment and personnel resources allow us to self-perform all phases of MGP remediation from site preparation through project execution and site restoration. Great Lakes E&I’s unique skill set includes barrier wall construction, In Situ auger mixing, contaminated source removal, and groundwater/soil remediation systems construction. These capabilities enable us to implement In Situ, Ex Situ, or hybrid combinations of these methodologies while working with MGP sites.
SHORELINE MGP SITE REMEDIATION
SAN FRANCISCO, CA
- MGP site remediation on the shore of San Francisco Bay
- High visibility urban setting with difficult logistics and intense oversight
- Installation of turbidity curtain and oil containment booms to protect the Pacific Ocean
- Demolition of remaining structures and excavation of MGP waste and contaminated sediment
- Construction of revetment including placement of a Reactive Core Mat (RCM), 800 tons of filter rock, and 1,500 tons of armor rock
- Site restoration including asphalt paving and fencing
Great Lakes E&I completed the interim Shoreline Maintenance Project at a former MGP site on the Potrero Power Plant property in San Francisco, California during the winter of 2010, fulfilling the primary construction role on a CPUC Diversified Contractor-led team. The project involved demolition of remaining structures, selective excavation of impacted inter tidal sediments, and construction of a contaminant system consisting of a reactive core mat (RCM) and protective rock armor revetment. The work scope included installation of a silt turbidity curtain and containment boom along the shoreline of San Francisco Bay, demolition of an existing pipeline and concrete structures, excavation of approximately 500 cy of Manufactured Gas Plant (MGP) waste and contaminated sediment along the shoreline, off-site disposal of excavated waste, installation of a reactive core mat (RCM), and placement of 2,500 tons of rock armor revetment.
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.