HomeMy WebLinkAboutAgenda Report - September 3, 2014 C-15AGENDA ITEM C.I5
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Councrl ConnMUNrcATIoN
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AGENDA TITLE:
MEETING DATE:
PREPARED BY:
Receive Update on Emergency Condition at White Slough Water Pollution Control
Facility Digesters No. 1 and No. 2
September 3,2014
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.
Guaranteed Maximum Price (GMP) proposals were solicited from Western Water Constructors, lnc., and
Overaa Construction, as discussed at the July 16,2014 City Council meeting. On August 20,2014, staf'l
received GMP proposals from both companies with following results:
Engineer's Estimate
Western Water Constructors, lnc.
Overaa Construction
GMP
$2,666,400
$1,995,710
$2,494,000
Contract Duration
465 Days
366 Days
450 Days
Mark Up
N/A
5o/o
11%
Staff evaluated both proposals. Considering the GMP amount, contract duration and mark up for general
overhead and profit, the proposal submitted by Western Water Constructors, lnc., reflects the best overall
value to the City. Staff recommended the City Manager execute a contract with Western Water
Constructors and expects to issue the Notice to Proceed by September 8, 2014, as scheduled.
The original estimate for repairing both digester lids was $3,100,000. Using the GMP proposalfrom
Western Water Constructors, lnc., the new estimated total cost to replace both digester lids is
$2,366,000. Both estimates included engineering, permits and inspection. By comparison, the estimated
cost to construct a single new digester is estimated to be $2,100,000 including engineering, permits and
inspections.
APPROVED:
K:\WP\PROJECTS\SEWER\WSWPCF\DigesterRepaìrs\Council Updates\CUpdate0903'14_2,doc
City Manager
8t2512014
Receive Update on Emergency Condition at White Slough Water Pollution Control Facility Digesters
No. 1 and No.2
September 3,2014
Page 2
The updated procurement and construction schedule reflecting project milestones is provided below,
based on the Western Water Constructors lnc., proposal.
ORIGINAL DATES REVISED DATES
Project Definition Meeting
lssue Final Contract Documents
Receive GMP Proposals
lssue Notice to Proceed
Complete Digester No. 2 lmprovements
Complete Digester No. 1 lmprovements
July 21,2014
August 1,2014
August 20,2014
September 8,2014
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March 19,2015
August 13,2015
FISCAL IMPAGT Proceeding with repairs is necessary to avoid substantial regulatory
compliance fines and penalties.
FUNDING AVAILABLE: Funding is available in the Wastewater Capital Fund (171493)
C}SçJ*'.
.&{ F. Wally Sandelin
Public Works Director
Prepared by Charlie Swimley, City Engineer / Deputy Public Works Director
FWS/CES/pmf
cc: Associate Civil Engineer Nathan
Charlie Swimley, City Engineer / Deputy Public Works Director
Wastewater Plant Superintendent
K:\WP\PROJECTS\SEWER\WSWPCF\D¡gesterRepairs\Council Updates\CUpdate090314-2.doc 8t25t2014