For City Council Meeting and Rialto Utility Authority [June 26, 2018]
TO: Honorable Mayor and City Council
APPROVAL: Robb R. Steel, Interim City Administrator
FROM: Thomas J. Crowley, P.E., Utilities Manager
Title
Request City Council/Rialto Utility Authority to Approve a Final Construction Work Authorization in the Amount of $310,141 to Rialto Water Services for the Sewer Facility Improvement Project S8 - Repairs to the Primary Clarifier, Aeration Basin and Diffusers in Plants No. 3 and No. 4.
(ACTION)
Body
BACKGROUND:
The City's Wastewater Treatment Plant (WWTP) serves the greater Rialto region and industry. Originally constructed in 1955 and expanded in later years, the WWTP consists of five distinct treatment plants named Plants 1 through 5. Plant 1 is abandoned. Each plant has individual primary and secondary treatment trains, but share common facilities for the tertiary treatment and solids handling.
On March 27, 2012, the City Council and the Rialto Utility Authority (RUA) took several actions related to approval of a Concession Agreement (CA) with Rialto Water Services, LP, (RWS) assigning operation and maintenance of the City's water and sewer utilities to RWS. Implementation of the utility capital projects is carried out pursuant to the process outlined in Article XII of the CA.
This project was identified during March of 2017 when Plant Operations staff noticed some issues with the processing of sewage, leading them to investigate further. Upon further investigation, they discovered the airline piping in the aeration basin was broken in numerous spots and the blower wasn't able to provide the required oxygen needed by the system to process sewage as required.
ANALYSIS/DISCUSSION:
Among the WWTP facility repairs identified are as follows:
* Drain and clean the primary clarifier for Plants No. 3 and 4,
* Drain and clean the aeration basins for Plants No. 3 and 4,
* Repair breaks and install new gaskets to seal aeration basin airlin...
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