Title
Resolution to Approve Amendment No. 1 to the Professional Services Agreement with Moore & Bruggink, Inc., for a Biodigester Feasibility Study - Phase 2 (RFP No. 22-12) ($88,130.00 Amendment, $129,786.00 Contract)
Memorandum
Your approval is requested for Amendment No. 1 to the Professional Services Agreement for professional engineering services with Moore & Bruggink, Inc.(M&B), for Phase 2 of the Biodigester Feasibility Study at the Water Resource Recovery Facility (WRRF) for $88,130.00.
The WRRF currently landfills centrifuge cake year-round. In 2023, the practice of land applying liquid biosolids as an agricultural supplement during non-winter months was suspended due to many pressures it faces including: effects of climate change (severe wet weather); availability and cost of trucking to application sites; new regulations from emerging contaminants (i.e., PFAS); fear by landowners because of emerging contaminants; and local nuisance concerns. As the pressure on land application increases landfilling may be the only option for disposal of biosolids in the future. The WRRF would have to rely on operating its centrifuges to dewater biosolids and send them to a landfill for disposal year-round. It is likely that millions of dollars of investment in odor control systems would be needed due to weather related increases in odor transmission based on the 2018 odor study. In addition, odors from biosolids could impede the WRRF's ability to find landfills that would accept them.
The City would benefit from a biodigester at the WRRF for the following reasons: a reduction in the quantity of biosolids transported off-site; a reduction in odors; provide viable options for the beneficial reuse of biosolids; and provide methane that could be used to generate heat or electricity for the WRRF. By providing a renewable source of energy for the WRRF, a biodigester would bring the City closer to achieving its A2 Zero goals.
In February 2022, RFP No. 22-12 was prepare...
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