HomeMy WebLinkAboutAgenda Report - April 1, 2015 C-09AGENDA ITEM coo q
CITY OF LODI
COUNCIL COMMUNICATION
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AGENDA TITLE: Accept Improvements Under Contract for Granular Activated Carbon (GAC)
Replacement, Well No. 18 and No. 20
MEETING DATE: April 1, 2015
PREPARED BY:
Public Works Director
RECOMMENDED ACTION: Accept improvements under contract for Granular Activated Carbon
(GAC) Replacement, Well No. 18 and No. 20.
BACKGROUND INFORMATION: The project was awarded to Calgon Carbon, of Pittsburgh, PA, in
the amount of $210,626.40, on October 15, 2014. The contract has
been completed in substantial conformance with the plans and
specifications approved by City Council.
Granular activated carbon (GAC) is utilized at certain well sites to adsorb dibromochloropropane (DBCP)
contaminates in the drinking water. Over time, the carbon loses its adsorptive capacity and must
be replaced. Test results indicated the current GAC in the vessels at Well No. 18 and No. 20 had lost its
adsorptive capacity and needed replacement.
This project consisted of replacing 141,000 pounds of GAC as follows:
Well Site No. 18 - three vessels with 23,000 pounds of GAC each
Well Site No. 20 - three vessels with 24,000 pounds of GAC each
The contract completion and actual completion date were both January 27, 2015. The final contract price
was $208,113.60. The difference between the contract amount and the final price is due to a slight
reduction in the actual quantities needed.
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: This project was necessary in complying with the maximum contaminant
levels at these well sites. The project does not create any additional
maintenance costs.
FUNDING AVAILABLE: This project was funded through DBCP settlement funds.
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F. Wally Sandelin
Public Works Director
Prepared by: Sean Nathan, Associate Civil Engineer
FWS/SN/smh
cc: Utilities Superintendent
APPROVED:
CAccept GAC 1820, doc
er, City Manager
3/17/2015