HomeMy WebLinkAbout04/19/2011, C 4 - WATER RECLAMATION FACILITY: CLARIFIER 1 AND PAINTING PROJECT; SPECIFICATION NO. 90908 Counat "-*1pri1 19,2011
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CITY O F SAN LUIS O B I S P O
FROM: Jay D. Walter, Director of Public Works JOW
Prepared By: Manny Guzman, Engineer II
SUBJECT: WATER RECLAMATION FACILITY: CLARIFIER 1 AND PAINTING
PROJECT; SPECIFICATION NO. 90908
RECOMMENDATIONS
1. Approve the plans and specifications for "Water Reclamation Facility: Clarifier 1 & Painting
Project, Specification No. 90908" and authorize staff to advertise for bids.
2. Authorize the City Manager to award the contract if the lowest responsible bid is within
Engineer's Estimate of$150,000.
DISCUSSION
This project involves maintenance painting of five areas at the Wastewater Reclamation Facility
(WRF). More specifically, work will involve cleaning, surface preparation, and recoating of:
1. Clarifier 1;
2. Filter building piping;
3. Equalization tanks piping;
4. Cooling tower station; and
5. Head works station
This project must occur during a time when flows at the facility are at its lowest. During low-
flow periods, one of the two final clarifiers can be taken out of service and the plant can still
process incoming flows and remain compliant with discharge requirements. Flows at the facility
are lowest during the summer months when the California Polytechnic University is out of
session and the City's population is reduced. For this reason most WRF projects are scheduled to
occur during this time period.
Clarifier No. 1 Coating
Clarifier No. I was originally constructed in 1941 as part of a major upgrade to the WRF. The
clarifier equipment and internal mechanisms were replaced in 1982 as part of an enlargement
project. No major work or recoating has occurred on this clarifier since this time. After 29 years
of service, the protective coatings on the walls and equipment are showing signs of deterioration.
The deteriorated coatings need to be replaced to protect the underlying surfaces from
deterioration and structural damage that would require costly repairs or replacement. Sacrificial
anodes will be installed to provide added protection to the submerged mechanical equipment.
This project also includes sealing of cracks between the clarifier tank and the perimeter gutter
and smoothing of the clarifier walls to better prepare the surface for coatings.
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WRF Clarifier 1 and Painting Project (90908) Page 2
Facility Maintenance Painting
The WRF has been constructed in phases over the years with major expansions and upgrades
occurring in 1941 and most recently in 1994. Facility piping and equipment can be anywhere
from 16 to 70 years old. Much of this equipment is showing signs of rust and corrosion. This is
not surprising due to the somewhat corrosive environment of the facility. Routine cleaning and
recoating of the facility is essential to slow the rate of corrosion and deterioration of the
structures and prevent costly replacement work. Recognizing this, WRF staff implemented an
annual maintenance painting program to provide routine painting of these facilities. Areas in
need of painting have been identified and prioritized by WRF staff. Four areas were taken care
of in last year's maintenance painting project. Five additional areas will be addressed with this
project.
CONCURRENCES
The Utilities Department has reviewed and approved this project. Also a notice of exemption has
been filed through the Community Development Department.
FISCAL IMPACT
The Clarifier No. 1 coating and the maintenance painting projects are identified in the 2009-11
Financial Plan, Appendix B, pages 3-133 to 3-137. In the 2010-11 project list, $120,000 is
identified for cleaning, repairs and recoating of Clarifier No. 1 and $100,000 is identified for
maintenance painting for a total budget of$220,000. Funding is available in the WRF Major
Equipment Replacement Master account, which has a current available balance of$1,295,257.
The estimated project costs are shown below:
Clarifier No. t and Facility Maintenance
Paintin- Project(90908)
Engineer's Estimate: $150,000
Contingencies: $22,500
Construction Management: $40,000
Design: $7,000
Printing and Misc: $500
Total Project Estimate $220,000
ATTACHMENT
Vicinity Map
AVAILABLE FOR REVIEW IN THE COUNCIL OFFICE
Plans and Project Specifications
T:\Coundl Agenda Reports\Public Works CAR\2011\CIP\90908 Clarifier 1&Maint.Painting\90908 CAR Advertise.doc
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