RockSol Project No. 599.27 The City of Grand Junction is soliciting competitive bids from qualified and interested companies for all labor, equipment, and materials required for Odor Control Improvement. All dimensions and scope of work should be verified by Contractors prior to submission of bids. IFB Questions: Dolly Daniels; Senior Buyer dollyd@gjcity.org The City would like to remind all Contractors, Sub-Contractors, Vendors, Suppliers, Manufacturers, Service Providers, etc. that (with the exception of Pre-Bid or Site Visit Meetings) all questions, inquiries, comments, or communication pertaining to any formal solicitation (whether process, specifications, scope, etc.) must be directed (in writing) to the Purchasing Agent assigned to the project, or Purchasing Division. Direct communication with the City assigned Project Managers/Engineers is not appropriate for public procurement, and may result in disqualification. Inquiry deadline, no questions after this date September 14, 2022 Work begins no later than December 5, 2022
Final Completion June 8, 2023 There are three components of work on this project. One is
installing a fully functional odor scrubber with Biotrickling Filter and Carbon Absorber
Units set on concrete pads. The second part is installing an air jumper across the Persigo
Wash near 2169 River Road (39.112355, -108.651119). This will allow the foul air to
cross the Persigo Wash where the sanitary sewer enters into a siphon and crossed under
the wash. The third component of the project is to build an Odor Scrubber on the Persigo
WWTP which will have two Biotrickling filters. There will be an epoxy coating needed to
be installed on the existing Parshall Flume. The completed Work will provide Owner with various
odor control improvements. More specifically, the Project includes, but is not limited to,
construction of the following:
1. A biotrickling filter at the Persigo Wastewater Treatment Plant for the mitigation of
odorous air upstream of the Headworks Facility.
2. Concrete coating and installation of an air curtain at the Parshall Flume upstream of the
Headworks Facility.
3. An air jumper connection at the Persigo Wash to connect headspaces between two
existing siphon structures in the collection system.
4. A biotrickling filter in the collection system near South 4
th Street, known as Dos Rios, for
the mitigation of odorous air.
5. All associated piping, site improvements, and electrical and instrumentation
improvements to deliver complete and operational systems.
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