HomeMy WebLinkAboutAgenda Report - January 5, 2022 C-06AGENDA ITEM (!ebb
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COUNCIL COMMUNICATION
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AGENDA TITLE: Accept Improvements Under Contract for Well 28 Granular Activated Carbon
System
MEETING DATE: January 5, 2022
PREPARED BY: Public Works Director
RECOMMENDED ACTION: Accept improvements under contract for Well 28 Granular Activated
Carbon Filter System.
BACKGROUND INFORMATION: In 2017, Well 28 was removed from service in anticipation of the
new State drinking water standards for the regulated chemical
known as 1,2,3,- trichloropropane (1,2,3 -TCP). This project was
needed for the well to meet State drinking water standards and return to service.
For decades, Granular Activated Carbon (GAC) has been utilized at several well sites within the City to
adsorb dibromochloropropane. The State Water Resources Control Board has identified GAC as a best
available technology for removing 1,2,3 -TCP contamination from drinking water.
This project consisted of furnishing and installing a GAC treatment system for Well 28, located at 2800
Kettleman Lane, as shown on Exhibit A. The work for this included furnishing and installing a GAC filter
system, complete with four low profile tanks, carbon media, concrete pad, and all required on-site piping
and valving, including approximately 90 linear feet of 8 -inch water pipe, 231 linear feet 12 -inch water
pipe, 156 linear feet of 14 -inch water pipe, and 90 linear feet of eight -inch wastewater pipe, and other
incidental and related work.
The Council approved plans and specifications, pre -authorized the City Manager to award the contract up
to $1,400,000 and execute change orders not to exceed $140,000 for this project on October 21, 2020.
The City Manager awarded the contract on January 1, 2021 to Smith Construction, Inc., of Fresno, in the
amount of $1,189,825.07.
The work was completed prior to the final contract completion date of November 22, 2021. A photo of
the completed work is shown in Exhibit B. The final contract amount was $1,220,462.12, due to three
change orders, amounting to $30,637.05.
Change Order No. 1 ($14,322.58) included rerouting the existing chlorine feed line to accommodate the
new GAC treatment system and installing a new three-inch spigot for water use on-site as requested by
City Staff.
Change Order No. 2 ($13,515.84) included a GAC wash assembly to allow for discharging GAC wash
water into the wastewater system.
Change Order No. 3 ($2,798.63) added a new water sample location as requested by the State regulator
APPROVED: Steve SchwabaUer
Stephen Schwabauer, City Manager
\\cvcfilv02\pubwks$\WP\PROJECTS\WATER\Well 28\Well 28 GAC\CAccept doc
12/16/2021
Accept Improvements Under Contract for Well 28 Granular Activated Carbon Filter System
December 1, 2021
Page 2
Following acceptance by the City Council, as required by law, the City Engineer will file a Notice of
Completion with the County Recorder's office. The notice serves to notify vendors and subcontractors
that the project is complete and begins their 30 -day period to file a stop notice requiring the City to
withhold payments from the prime contractor in the event of a payment dispute.
FISCAL IMPACT: Annual operation and maintenance costs for the water utility will increase
as a result of Well 28 being placed back into service and the addition of the
GAC treatment system.
FUNDING AVAILABLE: This project was funded by Water Capital Fund (56199000.77020).
OL 0 U-2
Charles E. Swimley, Jr.
Public Works Director
Prepared by Jimi Billigmeier, Associate Civil Engineer
CES/JB/cd
Attachment
cc: Andrew Richle, Utilities Superintendent
Travis Kahrs, Water Plant Superintendent
Mike Weltzin, Diede Construction
\Xcvcfilv02Xpubwks$\WP\PROJECTS\WATER\Well 28\Well 28 GAC\CAccept doc 12116/2021
Exhibit A
Well 28 Granular Activated Carbon (GAC) Filter System
2800 West Kettleman Lane
Date: 9/30/2020
I
Document Path: KAWMPROJECTS\WATER\Well 28 GAMExhibitA-Vicinity Map.mxd
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