HomeMy WebLinkAboutAgenda Report - December 18, 2019 C-07AGENDA ITEM c-7
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AGENDA TITLE:Adopt Resolution Ratifying Expenses and Authorizing City Manager to Execute
Change Orders to Granular Activated Carbon Replacement, Well No. 4R and Well
No. 22 ($350,000), and Appropriating Funds ($350,000)
MEETING DATE: December 18,2019
PREPARED BY: Public Works Director
RECOMMENDED ACTION: Adopt resolution ratifying expenses and authorizing City Manager to
execute change orders to Granular Activated Carbon Replacement,
Well No. 4R and Well No. 22, in an amount not to exceed $350,000,
and appropriating funds in the amount of $350,000.
BACKGROUND INFORMATION: The granular activated carbon (GAC) replacement project for Well 4R
and Well 22was competitively bid and awarded to Calgon Carbon
Corporation on February 6, 2019, in the amount of $230,222. This
Council action authorized the City Manager to execute change orders in an amount not to exceed $50,000.
When the spent GAC is removed, the interior of each carbon vessel is inspected by the contractor. Part of
the contractor's scope includes providing this specialized inspection, but does not include the cost of any
repairs (as they are unknown prior to the removal of the GAC and inspection of the vessel). Repairs are
then either performed in-house, or by the contractor by change order, as appropriate.
Change Order No. I was executed by the City Manager on June 6,2019, and included the cost to perform
repairs on two vessels at Well No. 22 ($28,699). Due to the total change order amount exceeding the City
Manager's authority of $50,000, Change Order No. 2 was authorized by Council on June 19,2019 and
included the repair of three vessels at Well No. 4R ($43,048). Change Order No. 3 was executed by the
City Manager on July 22,2019, and included repairs to the top head nozzle at Well No. 22, which was not
included in the original inspection and repair ($8,635). Change Order No. 3 (being requested for
ratification) was executed by the City Manager to expedite project completion because the high-demand
summer period had begun and production from this specific well was needed. The GAC replacement at
Well No. 4R and Well No. 22have now been completed with a total cost of $310,604.
To expedite completion of the next planned carbon change out project, staff recommends Calgon Carbon
Corporation provide the same services at Well No. 18 and Well No. 20. These well sites had their GAC
replaced approximately five years ago (by Calgon Carbon Corporation) and are in need of replacement
(due to contaminant level readings in the vessels). Well No.20 is now offline and Well No. 18 is
anticipated to go offline within the next few months. Having these well sites offline in the winter is
appropriate; however, they need to be available for the high-demand period of SpringiSummer of 2020.
Adding the GAC replacement to the existing contract will allow for the City to meet this timeline.
Calgon Carbon has provided a proposal to remove the GAC, inspect the vessels, and replace the GAC for
a total cost of 5235,524 (Exhibit A). The price is consistent with unit prices for the replacement GAC in the
APPROVED
K:\WP\PROJECTS\WATER\GAC4R22\C_ChangeOrderwelll 8&20.doc
r, City Manager
12t512019
Adopt Resolution Ratifying Expenses and Authorizing City Manager to Execute Change Orders to Granular Activated Carbon Replacement, Well No. 4R and Well No.
22 ($350,000), and Appropriating Funds ($350,000)
December 18,2019
Page 2
original contract, but again does not include potential costs for any vessel repairs, as the scope of the
repairs will not be known untilthe existing GAC is removed and the vessel is inspected.
Staff recommends ratifying expenses and authorizing City Manager to execute change orders to Granular
Activated Carbon Replacement, Well No. 4R and Well No. 22, in an amount not to exceed $350,000, and
appropriating funds in the amount of $350,000.
FISCAL IMPACT: This project, including the requested additional appropriation, is funded from
the Water Utility Fund's DBCP Operations and Maintenance account, under
the terms of the DBCP settlement. This project will not impact the General
Fund.
FUNDING AVAILABLE:Req uested Appropriation :
Water Capital (5619900077020) - $35O,OOO
Andrew Keys
Deputy City Manager/lnternal Services Director
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Chãles E. Swimi-ey, Jr
Public Works Director
Prepared by Sean Nathan, Senior Civil Engineer
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Attechment
Cc: Utility Superintendent
Calgon Carbon Corporation
Rebecca Areida-Yadav/Management Analyst
Construction Manager
K:\WP\PROJ ECTS\WATER\GAC4R22\C_ChangeOrderwelll 8&20. doc 12t5t2019