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DIGESTER 5 REHABILITATIONDESIGN-BUILD AGREEMENTRIVERSIDE BIOENERGY FACILITYCity Council July 2, 2024Public Works RiversideCA.gov2
THE WHY•Senate Bill 1383 - California is the only State to require:Organics recycling for all wasteEdible food recovery programsFood waste diversion programsCalifornia Senate Bill 1383 mandates:
RWQCP long-term biosolids management:
• Biosolids disposal costs continue to increaseyear-over-year• Biosolids disposal locations less availableand waste disposal requirements more stringent 1 2
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1. August 2020, City Council Approves Public works Renewable Resource Management Plan2. Organic waste recycling at RWQCP can supportSB 1383 compliance and enhance project impact3. RWQCP infrastructure and biogas currently underutilized4. RWQCP upgrades can optimize infrastructure and generate revenue from byproducts (biogas & digestate)5. Biosolids disposal options and costs are uncertainand pose long-term risk to the RWQCP6. Experienced partner would provide financing, infrastructure, and operations, reducing project risk to CityPROJECT BACKGROUND RiversideCA.gov4
REQUEST FOR PROPOSALS 2222OutcomeActionDatePre-qualification of entities with related experienceRequest for Qualification 2144March 2022Two proposals receivedRequest for Proposals 2222December 2022Selection committee received presentationsProposal PresentationsFebruary 2023Authorization to begin negotiationHighest ranked proposer releasedFebruary 2023Resolution authorizing $10M grant applicationto CalRecycleCity CouncilApril 2023Receive and file update on project and P3 approachCity Council Mobility and Infrastructure CommitteeMay 2023Lease and Energy Services Agreement (Riverside Bioenergy Facility)City Council ApprovedDecember 20233 4 6/18/2024
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Position the City of Riverside:Capitalize on future regional need & demand for organic waste disposal optionsPROJECT VISIONBiogasOpportunity:Upgrade RWQCP biogas to Renewable Natural Gas for SoCal Gas pipeline injection and saleDigestate Management:Process and manage biosolids from anaerobic digestion for saleDigester No. 5 Rehabilitation:Return digester to service to enable digestion of food waste, leveraging $2M in awarded CalRecycle grant fundsRiversideBioenergyFacility RiversideCA.gov6
SUSTAINABLE AND SELF-RELIANT RIVERSIDE
Digester5
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•One of the five digesters at the RWQCP.•75-ft diameter with 1.1MG capacity.•Constructed in 1982. Retired in 2017.•Assessment study by Carollo Engineers, Inc.—structural integrity, mechanical, electrical, and instrumentation.–Internal walls rehabilitation and seismic retrofits.–Removal of standby mixing pump.–New instrumentations and valves.–Electrical modifications.DIGESTER 5 RiversideCA.gov8
DIGESTER 5 EXISTING CONDITIONS
Roof view of Digester 5
Concrete crack of Digester 5
Interior View of Digester 57
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•Remove and the replace the existing dome.•Retrofit the digester’s wall.•Install new mixers.•Improve heat exchangers.•New Electrical equipment and Instrumentation.DIGESTER 5 REHABILITATION PROJECT RiversideCA.gov10
•Carollo’s estimate - $1.99M in 2019 → $2.4M in 2024.–Processing capacity: 100 Wet Tons Per Day (WTPD)–Biogas Production: 175 standard cubic feet per minute (scfm)–High Strength Waste output: 10 tons per day (tpd)•Design-Build Agreement - $9,508,000 –Processing capacity: 353 WTPD (3.5 times increase)–Biogas Production: 502 scfm (2.9 times increase)–High Strength Waste output: 30 tpd (3 times increase)•Digester 5 → Regional FacilityDIGESTER 5 REHABILITATION PROJECT9 10 6/18/2024
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•Design-Build Contract, Contingency, Construction Engineering, Inspection, Survey, and Material Testing: $10,934,200.•CalRecycle Grant: $2,000,000•Incentive Tax Credit Benefit up to (40%): $4,183,520.•Anticipated net cost: $4,275,280PROJECT COST AND GRANTS RiversideCA.gov12
Strategic Priority 4 – Environmental Stewardship Goal 4.6: Implement the requisite measures to achieve citywide carbon neutrality no later than 2040.Strategic Priority 5 – High Performing GovernmentGoal 5.2: Utilize technology, data and process improvement strategies to increase efficiencies, guide decision making and ensure services are accessible and distributed equitably throughout all geographic areas of the City.Strategic Priority 6 – Infrastructure, Mobility, and ConnectivityGoal 6.3 Identify and pursue new and unique funding opportunities to develop, operate, maintain, and renew infrastructure and programs that meet the community’s needs.
STRATEGIC PLAN ALIGNMENT11
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That the City Council:1. Award a Design–Build agreement for the rehabilitation of Digester No. 5to Anaergia Services, LLC a Delaware limited liability company, DBARiverside Bioenergy Facility, LLC, a Delaware LLC in the amount of$9,508,000.00;2. Authorize a 10% change order authority in the amount of $950,800.00 forthe Design – Build agreement to rehabilitate Digester No. 5 to AnaergiaServices, LLC a Delaware limited liability company, DBA RiversideBioenergy Facility, LLC, a Delaware LLC for a total contract not toexceed $10,458,800;RECOMMENDATIONS RiversideCA.gov14
3. Authorize the City Manager, or designee, to execute the Design–BuildAgreement with Riverside Bioenergy Facility, LLC, including makingminor and non-substantive changes, subject to the availability ofbudgeted funds; and4. By at least five affirmative votes, authorize the Chief Financial Officer, ordesignee, to record a supplemental appropriation in the amount of$8,434,200.00 from available Sewer Working Capital to the Digester 5Rehabilitation expenditure account.RECOMMENDATIONS13 14