BAY CITY, MI - A project to test the Middlegrounds site in preparation for cleaning up contamination has seen a bit of a change but is still moving forward.
Back in 2021, the Bay City Commission previously approved a contract with Regenesis Remediation Services of San Clemente, Cal. to start a pilot testing phase for the remediation of pollutant contaminants at the Middlegrounds, which is located in the middle of the Saginaw River south of the Lafayette Avenue Bridge.
The Bay City Commission later approved a change to its contract with Regenesis Bioremediation Services on Monday, Aug. 15 for an increased amount of $4,403.34 to accommodate the additional costs associated with follow-up testing at the Middlegrounds.
According to the city, the original pilot test was partially conducted on May 17 and the borings produced a lithology and groundwater quality that was not conducive to a successful pilot test. Because of this, a second site was needed for another round of pilot testing to start.
A new location has been chosen and approved by EGLE for an injection permit, according to the city. This new proposed area has had several borings and groundwater samples taken.
The Middlegrounds landfill first was used in 1956 and MLive previously reported that the former dump was closed by the state in 1984.
The landfill was reported to have leaked harmful levels of polychlorinated biphenyls and other industrial chemicals into the river before a combined effort was undertaken to cleanup the environmental risks. In 1998, the city and Honeywell International entered into a consent decree with then MDEQ (now EGLE) to provide for the completion of a Remedial Investigation and Feasibility Study, the implementation of an Interim Response Action, and the submission of an approved Remedial Action Plan, according to the city. Honeywell and the city share costs related to these items, with the city’s share clocking in at 60.25%, said the agenda item.
The Bay City Times previously reported that Regenesis Remediation Services was recommended to the city and Honeywell due to the “trademark technology” that has proven successful in these types of situations and location like the Middlegrounds.
Regenesis Remediation Services uses a type of technology called “PlumeStop Liquid Activated Carbon.” RSS states on the company’s website that, “PlumeStop accomplishes treatment with the use of a highly dispersible, fast-acting, sorption-based technology which captures dissolved-phase contaminants within its matrix-like structure. Once contaminants are absorbed onto the regenerative matrix, biodegradation processes achieve complete remediation at an accelerated rate.”
PlumeStop is applied into the subsurface through gravity-fed or low-pressure injection.
Read more from MLive
Middleground Landfill monitoring to cost an additional $2.3 million
After 25 years and $5 million, cleanup at Bay City’s Middlegrounds Landfill is nearly complete
Bay City considering liquid activated carbon technology for Middlegrounds Landfill remediation
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August 21, 2022 at 08:15PM
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Follow-up testing needed for Middlegrounds Landfill contamination cleanup project - MLive.com
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