HomeMy WebLinkAboutAgenda Report - September 5, 2007 E-11AGENDA ITEM Eop %%
4Q CITY OF LODI
COUNCIL COMMUNICATION
AGENDA TITLE: Report on Contract Change Orders for White Slough Water Pollution Control
Facility Phase 3 Improvements Project 2007
MEETING DATE: September 5,2007
PREPARED BY: PublicWorks Director
RECOMMENDED ACTION: This item is for information only. No action is required.
BACKGROUND INFORMATION: In accordance with the Contract Change Order Policy, the
City Council is being informed of change orders approved by the
City Manager for this project. The original contract for this project
was $16,387,000. The total cost of change orders to date is
$373,879, which is 2% of the original contract. The project is approximately 36% complete. Detailed
below is a description of the work involved in the change orders. Complete descriptions and backup
informationfor these change orders are available in the Public Works Department.
Change Order No. 1 - This change order is a credit for using native soil as backfill at the chlorine
contact tank demolition in lieu of the specified class 11 aggregate base. ($15,000 CREDIT)
Change Order No. 2 -This change order is for the removal of sludge and surface water at the
location of new Aeration Basins Nos. 5 and 6 and at the chlorine contact tanks priorto demolition.
($33,866)
Change Order No. 3 -This change order is for the purchase of equipment and software furnished to
the City required to managethis project at the on-site office trailer. ($5,789)
Chanae Order No. 4 - This change order is for work associated with the installation of an 8 -inch
drain line under new Aeration Basins Nos. 5 and 6 due to the elevation of the existing 8 -inch drain
from Aeration Basin No. 4 being different than was shown in the original White Slough plans.
($13,184)
Change Order No. 5 -This change order is for the cost of supplying and installing the new manhole
on the domestic influent line related to the planned bypass work for the headworks improvements
and pipeline repairwork. ($59,709)
Change Order No 6 -This change order is a credit for changing a portion of Type ' "Acontrol wire
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conduits from coated metallic to PVC. ($8,000 CREDIT)
Chanae Order No 7 - This change order is for Supervisory Control and Data Acquisition (SCADA)
designwork. This work is required to integrate the new Phase 3 project elements with the existing
plant system. Ratherthan select a separate firm to do this work, staff asked to have Myers Control
perform this task. Myers Control is the subcontractor providing and installing the control equipment
and comes highly recommendedto perform the SCADA work. The change order includes a
$20,000 allowance for additional programming as may be required by the City. If these services are
not required, then the amount will be lower. ($81,000)
APPROVED: - ---)
Blair Kinf� Manager
K:AVVFI\PROJECTS\SEV4ER%WSWPCRVVhiteSioughWPCF Phase 3 Improvements 2007TormskCC NotifyofCOWSWIDU PhaSe3=7.doc 8/3112007
Report on Contract Change Orders for White Slough Water Pollution Control Facility Phase 3
Improvements Project 2007
September 5, 2007
Page 2
Change Order No. 8 -This change order is for the design and construction of the outfall bypass
structure for the domestic and industrial outfall lines. The structure will permit the City to bypass
waste flows between the two lines as necessary to perform the domestic outfall repair, line the
domestic outfall and allow for future bypass as may be needed. Constructing the permanent bypass
and coordinating the separate items of work will save significant costs for performing temporary
bypass work and will greatly facilitate future maintenance and repairwork. The cost includes design
at a significant cost and time savings over having a separate firm do the design. ($153,331)
The total contract to date is $16,710,879.
FISCAL IMPACT: None
FUNDING AVAILABLE: There are sufficient funds budgeted in the original project appropriation to
cover these eight change orders.
vans, glug-76�anager
Richard C. Prima, Jr.
PublicWorks Directc
Prepared by Gary Wiman, Construction Project Manager
cc: Charles Swimley, Water Services Manager
Del Kerlin, Wastewater Treatment Superintendent
K\VVPkPR0JECTSNSEWER\WSWPCRWhte SioughWPCF Phase 3 Improvements 2007\Forms\CC Notify of COWSWPCF Phase 32007.6oc 8/31/2007