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ITEM 32
City Council Memorandum Public Works & Utilities Memo No. UA24-004
Date:
July 17, 2023
To:
Mayor and Council
Thru:
Joshua H. Wright, City Manager
Andy Bass, Deputy City Manager
John Knudson, Public Works and Utilities Director
From:
Josef Kennis, Utility Plant Superintendent
Subject:
Competition Impracticable Purchase of Odor Control Data Collection and Analysis Services
Proposed Motion:
Move City Council approve the competition impracticable purchase of odor data collection and analysis, from In-Pipe Technology, in the amount of $132,000.
Background/Discussion:
The Public Works & Utilities Department’s wastewater collection system consists of over 900 hundred miles of pipe and eight sewage lift stations throughout the City. These structures work together to convey 30 million gallons of sewage to the City’s three wastewater treatment plants every day. The sewage collection system runs beneath most streets throughout the City.
Wastewater in the sewage collection system naturally produces noxious hydrogen sulfide gas, causing odors and corrosion to the pipes, manholes, and concrete structures. Reduction of hydrogen sulfide in the collection system can be accomplished by adding both chemical and microbial compounds at key locations that impede the formation of gas and help reduce the cost to rehabilitate affected structures. Lowering the concentration of hydrogen sulfide gas entering the Airport and Ocotillo water reclamation facilities will also help to drive down the cost of odor control at these facilities. This odorous gas is the main source of customer odor complaints associated with the City’s sewer system and treatment facilities.
The project scope of works includes sampling and analysis within the wastewater collection system to better understand the formation and effectiveness of treatments used in the collection system. Information gathered from this effort will be used to develop new and more efficient methods to manage odor within the wastewater system.
Evaluation:
Odor data collection and analysis has been performed by In-Pipe Technology, LLC, for over three years. The data being collected by this company will be used in the coming months for a larger study about the collection system odor development and movement. It is important to minimize variables to past practices in the upcoming study to achieve the most accurate results. In-Pipe Technology's knowledge and experience makes the company uniquely qualified to continue the work. In addition, In-Pipe Technology's proposal includes no increases to rates and allows for the use of equipment already in place, avoiding mobilization costs. Staff recommends the competition impracticable purchase of odor control data collection and analysis from In-Pipe Technology, LLC.
Fiscal Impact
Account No.
Fund Name
Program Name
Dollar Amount
CIP Funded Y/N
615.3970.5219.0.0.0
Wastewater Operating
Other Professional Services
$132,000
N
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