HomeMy WebLinkAbout12/12/1989, C-4 - SUBMITTAL OF PLANS AND SPECIFICATIONS FOR WASTEWATER TREATMENT PLANT ""ANAEROBIC DIGESTER CLEANING P" r-
QIIN�� � MEETING DATE
city of san lues OBISPO December 12. 1 89
COUNCIL AGENDA REPORT TEM NUMBER; s �f
_r
FROM:
David F. Romero am T. Hetland )f� Prepared By: John Moss
Public Works Utilities Director Wastewater Division
Director Manager
SUBJECT:
Submittal of Plans and Specifications for Wastewater Treatment
Plant "Anaerobic Digester Cleaning Project-City Plan No. P-38S11 .
CAO RECOMMENDATION:
By Resolution Approve Plans and Specifications, Authorize Staff
to Advertise for Bids and Authorize CAO to Award Contractsif Bids
Received are. Below Engineer's Estimates.
BACKGROUND:
This project is required as scheduled maintenance of major plant
equipment at the wastewater treatment plant. Anaerobic Digesters
are used for the treatment and stabilization of sewage sludge.
Scheduled cleaning of the digesters is required as over time they
become filled with inorganic materials and their capacity for
digestion is reduced. For ease of administration the project has
been broken down into three separate phases, one phase for each
digester. Each Phase of the project will be bid as a separate
contract. After cleaning, each digester will be inspected for
needed repairs. The required repairs will be bid out and
completed prior to proceeding with the next phase of the project.
ALTERNATIVES:
1. Approve Plans and Specifications as submitted, authorize
staff to advertise for bids and authorize CAO to award the.
contracts if bids received are below engineer's estimates.
2. Do not approve plans and specifications at this time. This
alternative could result in reduced treatment of the wastewater
sludge, cause severe operational problems with the anaerobic
digestion process, and could result in violation of the City's
Waste Discharge Requirements.
FISCAL IMPACT:
Engineers Estimate:
Phase 1 $25, 000
Phase 2 $15, 000
�- Phase 3 $15, 000
Total: $55, 000
Contingencies: $ 5F500 �- �f
��h���Ni�IIIIIII�Pa� �Il city of san : ,s oBispo
COUNCIL AGENDA REPORT
Digester Cleaning Projects - City Plan No. P-38S
December 12, 1989
Page Two
Council approved funding for this project in the 1989-91
Financial Plan (page E-7) . The $77, 000 budget includes cleaning
of the digesters and any needed repairs. As noted above, the
extent of repairs can not be determined until the digesters are
cleaned and an internal inspection is made. The budget balance
of $16, 500 from the engineer's estimate is available to provide
for these costs.
CONSEQUENCES OF NOT TARING THE RECOMMENDED ACTION:
Not taking the recommended action could result in reduced
treatment of the wastewater sludge, cause severe operational
problems in the anaerobic digestion process, and could result in
violation of the City's Waste Discharge Requirements.
RECOMMENDATION:
By resolution, approve plans and specifications for "Wastewater
Treatment Plant, Digester 1, Digester 2, Digester 3 Empty and
Clean Projects", authorize staff to advertise for bids and
authorize CAO to award contracts if successful bids are equal to
or below engineer's estimates.
Attachment.: Draft Resolution
cardigcl.wp
RESOLUTION NO. (1989 Series)
C
A RESOLUTION OF THE COUNCIL OF THE CITY OF
SAN LUIS OBISPO APPROVING PLANS AND SPECIFICATIONS
FOR WASTEWATER TREATMENT PLANT, CITY PLAN NO. P-38S
AND AUTHORIZING STAFF TO ADVERTISE FOR BIDS
WHEREAS, the Anaerobic Digester Cleaning Project is a
project required as scheduled maintenance of major plant
equipment at the City's Wastewater Treatment Plant; and
WHEREAS, Anaerobic Digesters are used for the treatment and
stabilization of sewage sludge; and
WHEREAS, this project is three separate phases, one phase
for each digester requiring a separate contract; and
WHEREAS, Council approved funding for this project in the
1989-91 Financial Plan on July 24, 1989.
NOW,, THEREFORE, BE IT RESOLVED adopting a resolution
approving plans and specifications for Wastewater Treatment
Plant, Digester 1 (Phase 1, $251000) ; Digester 2 (Phase .2 ,
$15, 000) ; Digester 3 (Phase 3, $15,000) Empty and Clean Projects,
City Plan No. P-38S; authorize staff to advertise for bids; and
authorizing City Administrative Officer to award contracts if
successful bids are equal to or below engineer's estimates.
On motion of seconded by
and on the following roll call vote:
AYES:
NOES:
ABSENT:
the foregoing Resolution was passed and adopted this day of.
December, 1989.
MAYOR RON DUNIN
ATTEST:
CITY CLERK PAM VOGES
Resolution No. (1989 Series)
APPROVED:
C?
City -Ad*InristVrativd Officer
tt
Firi&fice Director
Utilities Director `
Public Works Director -
tewater Division Manager
1�