15.B.3.
Request for Approval of a Leachate Treatment Project at the IRC Landfill
Director of Utility Services Vincent Burke introduced the item to the Board noting
that new environmental regulations would require the County to change the way it
treated leachate (liquid that percolated through the landfill) from the current
process of diluting it through the County's wastewater treatment facility.
Himanshu Mehta, Solid Waste Disposal District Director, utilized a PowerPoint
presentation which explained the environmental challenges of leachate treatment.
He discussed two (2) possible long-term solutions to treating the leachate. The
first was a previously-tested leachate evaporation system, created in conjunction
with the Indian River Eco District (IRED) and Heartland Water Technology,
which would be powered by landfill gas and natural gas. The second long-term
solution involved converting IRED's deep injection wells to handle leachate; the
cost and environmental feasibility of this option was still to be determined.
Director Mehta's discussion then turned to the short-term problem caused by
having the landfill's wells filled by concentrated leachate. He explained that the full
wells were preventing the collection of landfill gas which SWDD had contracted
to sell to IRED. A short-term solution to de-water the wells and send the
leachate to another county for disposal was also brought forth for consideration.
He closed the presentation with staff's recommendations.
Under discussion, Commissioner Adams received confirmation of the critical
nature of the problem, and expressed distaste for deep well injection and off-site
disposal. Director Burke provided additional information regarding pending
legislation and the implications for leachate disposal.
Next, Alain Castro, IRED Managing Partner, presented information explaining the
IRED and their business model. Upon query by Vice Chairman O'Bryan, Mr.
Castro explained that the liquid leachate was preventing landfill gas from forming,
and he projected it would take three (3) months to dewater the wells and restore
gas production. Mr. Earl Jones, CEO of Heartland, described the environmental
challenges of disposing of "forever chemicals" called PFAS, and discussed his
company's qualifications to construct a leachate evaporation system which would
work in conjunction with IRED's landfill gas management system.
Commissioner Adams spoke in favor of creating a long term leachate evaporation
system with IRED and Heartland, as well as the short-term solution of removing
and disposing of the existing leachate at an off-site location. Vice Chairman
O'Bryan received confirmation of a six-month timeline to create the leachate
evaporation system. Chairman Flescher expressed support for an in-house,
long-term solution to leachate processing.