HomeMy WebLinkAboutAgenda Report - November 18, 2015 C-21CITY OF LODI
COUNCIL COMMUNICATION
TM
AGENDA TITLE:
MEETING DATE:
PREPARED BY:
AGENDA ITEM
C -Zi
Receive Update on Emergency Condition at White Slough Water Pollution Control
Facility Digesters No. 1 and No. 2
November 18, 2015
Public Works Director
RECOMMENDED ACTION:
Receive update on emergency condition at White Slough Water
Pollution Control Facility Digesters No. 1 and No. 2.
BACKGROUND INFORMATION: White Slough Water Pollution Control Facility (WSWPCF) has four
covered anaerobic digesters that serve the purpose of breaking down
sewage sludge that enters the plant. On July 16, 2014, Council
declared an emergency condition in response to concurrent roof failures on Digesters No. 1 and No. 2.
Public contract code requires Council to review the emergency action at its next regularly -scheduled
meeting and each regularly -scheduled meeting thereafter until the emergency is terminated.
The completed Digester No. 2 became operational on April 6, 2015.
The construction work to repair Digester No. 1 cover is complete. The digester was expected to become
operational by August 27, 2015. Prior to commissioning, the contractor performed a leak test on the digester
structure using clear water. The test determined a number of very small, non-structural leaks in the digester
wall that must be repaired. The appropriate leak repair methods have been determined and the work is
underway. The estimated cost to perform the leak repairs is $120,000. Expenditures to date for the repair of
both digesters is $2,450,000. The total cost, including the leak repairs to Digester No. 1, will not exceed the
original appropriation of $3,100,000.
The procurement and construction schedule reflecting project milestones is provided below. It is expected
that the leak repairs will be completed by January of 2016.
Project Definition Meeting
Issue Final Contract Documents
Receive GMP Proposals
Issue Notice to Proceed
Complete Digester No. 2 Improvements
Complete Digester No. 1 Improvements
Digester No. 1 Leak Repairs
Digester No. 1 Back in Service
FISCAL IMPACT:
FUNDING AVAILABLE:
Not applicable.
Not applicable.
July 21, 2014
August 1, 2014
August 20, 2014
September 15, 2014
April 2, 2015
August 27, 2015
December 1, 2015
January 1, 2016
td.,
F. Wally Sandelin
Public Works Director
Prepared by Charlie Swimley, City Engineer / Deputy Public Works Director
FWS/CES/tb
cc: Associate Civil Engineer Nathan
Charlie Swimley, City Engineer / Deputy Public Works Director
Wastewater Plant Superintendent
Construction Project Manager
APPROVED:
-ue , City Manager
K:\WP\PROJECTS\SEWER\WSWPCF\DigesterRepairs\Council Updates\CUpdate111815.doc 10/29/2015