HomeMy WebLinkAboutAgenda Report - November 2, 2016 C-08TM
CITY OF LODI
COUNCIL COMMUNICATION
AGENDA ITEM
C -S
AGENDA TITLE: Accept Improvements Under Contract for Well 23 Granular Activated Carbon
Replacement Project
MEETING DATE: November 2, 2016
PREPARED BY: Public Works Director
RECOMMENDED ACTION: Accept improvements under contract for Well 23 Granular Activated
Carbon Replacement Project.
BACKGROUND INFORMATION: 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. While replacement intervals vary depending upon the concentration of DBCP and well run
times, staff anticipates one of the seven GAC facilities serving the water system to need carbon
replacement each year. While Well No. 23 was providing safe drinking water that meets all State and
federal drinking water requirements, test results indicated the GAC in the treatment system had lost its
adsorptive capacity and needed replacement.
Well No. 23 is located at 55 East Harney Lane. The GAC treatment system at this location had been in
service since 1998. The well site contains two vessels with 30,000 pounds of GAC each. The total
amount of GAC replaced was 60,000 pounds.
The contract was awarded to Calgon Carbon Corporation of Pittsburgh, PA in the amount of $87,660 on
May 4, 2016. The project completion date was October 7, 2016. The final contract price was $93,730.
The difference between the original contract price and the final contract amount is due to City requested
repairs to the carbon vessel internal liner. The area requiring repairs was discovered during the carbon
change out and inspection process.
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: Not applicable.
FUNDING AVAILABLE: This project was funded by Water Capital Projects (56199000.77020)
Charles E. Swimiey, Jr.
Public Works Director
Prepared by Lyman Chang, Interim City Engineer/Deputy Public Works Director
CES/LC/tdb
cc: Utilities Manager
Calgon Carbon Corporation
Public Works Management Analyst
APPROVED:
' c wabab -r C y Manager
K:\WP\PROJECTS\WATER\Well 23\GAC\CAccept Well 23 GAC.doc 10/24/16