HomeMy WebLinkAboutAgenda Report - March 7, 2012 C-05AGENDA ITEM 0.S
CITY OF LODI
COUNCIL COMMUNICATION
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AGENDA TITLE: Accept Improvements Under Contractfor White Slough Water Pollution Control
Facility Biosolids Dewatering and Storage Facility Project
MEETING DATE: March 7, 2012
PREPARED BY: Public Works Director
RECOMMENDED ACTION: Accept improvements under contract for White Slough Water Pollution
Control Facility biosolids dewatering and storage facility project.
BACKGROUND INFORMATION: The project was awarded to Cushman Contracting, Inc., of Goleta,
on December 15, 2010, in the amount of $3,715,000. The contract
has been completed in substantial conformancewith the plans and
specifications approved by City Council.
This project consisted of the construction and completion of the White Slough Water Pollution Control
Facility biosolids dewatering and storage facilities and associated improvements, including dewatering
equipment, two skid -mounted rotaryfan presses, chemical feed equipment, piping, pumps, electrical
controls, covered bays for the storage of dewatered sludge and all associated work.
The contract completion date was October 26, 201 1, and the actual completion date was January 21, 2012.
The difference between the original completion date and the actual completion date was related to weather
delays, building permit processing, and change orders. The final contract price was $3,991,599.18. The
difference between the contract amount and the final contract price is due to $276,599.18 in contract change
orders. The six change orders included:
Change Order No. 1 included modificationsto the sludge lagoon mixing pumps, adding bollards and
changing specified valve bodies from cast iron to ductile iron ($8,165.25).
Change Order No. 2 included owner -requested repairs to the ultra violet light disinfection system wash
tank ($34,193.45).
Change Order No. 3 included changes required during the design build process, such as adding rebar for
expanded concrete footings, increasing the fire service pipeline diameter from 6 inches to 8 inches, and
changing several electrical service components ($12,316.39).
Change Order No. 4 included owner -requested repairs to an existing digested sludge line, replacement of
an existing electrical conduit on the primary sedimentation basins, and extension of the contract time
associated with the design build plan review process ($162,312.13).
Change Order No. 5 included the addition of an owner -requested chemical metering pump enclosure and
the removal and off -haul of unsuitable backfill material unexpectedly discovered during the site grading
work ($50,609.25).
APPROVED:
Bartlam, City Manager
K:\WP\PROJECTS\SEWER\WSWPCF\Biosolids Dewatering\CAccept.doc 2/22/2012
Accept Improvements Under Contract for White Slough Water Pollution Control Facility Biosolids
Dewatering and Storage Facility Project
March 7, 2012
Page 2
Change Order No. 6 included an owner -requested cable warning system on the roof structure,
owner -requested site improvementsfor better grease hauler access, miscellaneous piping adjustments,
temporary project power during an NCPA outage and a credit for owner -requested reduction in scope of
work for headworks conduit replacement ($9,002.71).
Following acceptance by the City Council, as required by law, the City Engineerwill 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: Annual operating costs for this facility are estimated to be $265,000 per
year. Operating costs are included by the current rate model.
FUNDING AVAILABLE: 2007 Wastewater COP Funds (172026)
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F. Wally S elfin
Public Works Director
Prepared by Charles E. Swimley, Jr., Deputy Public Works Director— Utilities
FWS/CES/pmf
cc: Charles E. Swimley, Jr., Deputy Public Works Director- Utilities
GaryWiman, Construction Manager
K:\WP\PROJECTS\SEWER\WSWPCF\Biosolids Dewatering\CAccept.doc 2/22/2012