REMINDER: A Pre-proposal Meeting will be conducted on September 12, 2019 at 9 a.m. at the Wastewater Treatment Plant. This meeting will allow for tours of the two facilities and time for questions and answers. No additional meetings will be allowed beyond the Pre-proposal Meeting.
The City of Iowa City is soliciting proposals from interested consulting firms, licensed in the State of Iowa, to provide professional engineering services for the Iowa City Landfill and Recycling Center and Wastewater Treatment Plant. The selected firm will assist the City in a methane feasibility study in achieving two of the City's goals in the Climate Action and Adaptation Plan:
- Take action on a study to efficiently capture and use methane from the Wastewater Plant.
- Take action on a feasibility study on energy generation from Landfill methane.
Public bidding information and documents
The full RFP can be found online.
Bids were open on Monday, Aug. 26, 2019. Submittals are due by 4 p.m., Monday, Sept. 30, 2019. Late submittals will not be evaluated.
They can be delivered to:
City of Iowa City City Hall
410 E. Washington St.
Iowa City, Iowa 52240
Full project timeline
- Pre-proposal meeting will be on September 12, 2019
- All inquiries must be made no later than September 18, 2019
- If interviews are conducted, they will be done during the week of October 21st
- Selection of consultant will occur on approximately October 25, 2019
- Consultant agreements will be finalized approximately by November 8, 2019
- Project deadline of February 28, 2020
Take Action on a Study to Efficiently Capture and Use Methane from Wastewater Operations
After water is used by residents, it flows into the wastewater system and then goes to the City’s Wastewater Treatment Facility. While the City currently captures methane gas from the digesters used in the wastewater treatment process, only a portion of the methane is used to offset natural gas usage for the plant. To explore other options for further management of wastewater GHG emissions, the City should conduct a study to determine the feasibility of using all captured methane to create renewable fuel or electricity that can be used to operate the facility, and take specific actions based on the results of this study.
Take Action on a Feasibility Study on Energy Generation from Landfill Methane
The methane produced by decomposition of organic waste in the Iowa City Landfill is currently being flared to transform it into carbon dioxide, which is a less potent GHG. The City has been considering methods to use the methane as a renewable energy source, and to further explore this opportunity, the City will conduct a feasibility study in FY2019 and take specific actions based on the results of this study.
Responses to Inquiries
General Response: Many of the landfill’s regulatory documents are available on the Iowa Department of Natural Resources (DNR) Website. The DNR Solid Waste Permitting Electronic Document Retrieval (Document DNA) is located online. The DNR Air Quality Bureau’s Records Center Information can also be found online. Please feel free to download any of these documents.
- Question 1: Our understanding is that landfill leachate goes to the sanitary sewer system for ultimate treatment at the City WWTP. Please confirm that this understanding is correct.
- Response 1: The leachate from the landfill is conveyed through sanitary sewers to the Wastewater Plant.
- Question 2: How much landfill leachate is produced?
- Response 2: We keep track of the leachate that leaves the facility through the lift station. A document will be posted with these flow rates.
- Landfill lechate flowrates by month since 2017.
- Question 3: Is there any leachate recirculation at the landfill?
- Response 3: No, there is not.
- Question 4: Will the City provide a copy of the Gas Collection and Control System (GCCS) Plan to proposers?
- Response 4: A Gas Collection and Control System (GCCS) Plan is not required by the facility’s permits. We likely have the components that would comprise such as a plan. If specific parts are requested, they can be provided.
- Question 5: Does the City conduct surface emissions surveys at the landfill? If yes, would the latest report be made available to proposers?
- Response 5: As part of the Title V Operating Permit, the City conducts semi-annual monitoring. The Semi-Annual Monitoring Reports are public records and available on the DNR website.