HomeMy WebLinkAbout01/06/1998, C4 - WATER RECLAMATION FACILITY: CLARIFIER 1 & 3 REPAIR, SPECIFICATION NO. 98-69council Mee ryD.eJan 6, 1998
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C I T Y OF S A N L U I S O B I S P O
FROM: Michael D. McCluskey, Public Works Director
Prepared by: Barbara Lynch, Civil Engineer, l
SUBJECT: Water Reclamation Facility: Clarifier 1& 3 Repair, SpecificationNo. 98 -69.
CAO RECOMMENDATION:
1. Approve plans and specifications for "Water Reclamation Facility: Clarifier 1 & 3 Repair,
Specification No. 98 -69."
2. Authorize staff to advertise for bids and authorize the CAO to award the contract if the lowest
responsible bid is within the Engineer's Estimate.
3. Authorize staff to purchase replacement equipment from a sole source for the repair project.
DISCUSSION:
Two of the clarifiers at the Water Reclamation Facility are in need of repair and have been for
several years. It had originally been hoped to complete this work in the early 1990's but the work
had to be postponed due to funding constraints. The clarifiers have recently been drained and
inspected by both engineering and facility staff to verify their condition. While much of the
protective coating on the large rake arms and center column has failed, the metal underneath
appears to still be in good condition. The equipment is at a critical point where it should not be
allowed to remain in service without attention for any extended period.
There is a considerable amount of internal equipment in the clarifier units to drive the large rakes.
It is planned to refurbish these drive units, replacing parts as needed. Certain pieces of the drive
units are known to be in need of replacement. This equipment is not standard, off the shelf type
equipment. Likewise it is not possible to substitute pieces of equipment from other than. the
original manufacturer due to specific design and installation requirements. The clarifier equipment
was furnished in about 1962 on Clarifier 3 and 1976 on Clarifier 1. It is felt that the original
manufacturer is the only parry that will be able to furnish correct replacement parts. It is staff's
intention to purchase replacement equipment at this time and have it on site at the time the contract
for repair is advertised. This will allow the contractors to see the equipment they will be working
with prior to submitting bids.
The repair project must be completed in the summer months due to plant loading and weather
constraints on coating work. It is planned to proceed with the ordering of replacement equipment at
this time to make sure it is here in time for summer of 1998 construction. The actual repair contract
will be advertised in the late winter.
CONCURRENCES:
Community Development Department has given this project a categorical exemption.
67 y-/
Council Agenda Report - Water Reclamation Facility: Clarifier 1& 3 Repair
PaL,e 2
FISCAL IMPACT:
Costs:
Engineer's estimate $65,000 for equipment
$85,000 for repair
20 %* contingencies $30,000 for repair work
TOTAL: $1809000
* contingencies are high for this project due to the unknown condition of the interior mechanisms
Funding: Budget:
1995 -97 Financial Plan, Appendix B page 64 $60,000 for Clarifier # 1
1997 -99 Financial Plan, Appendix B page 75 $80,000 for Clarifier #3
Unused funds from completed projects ** $40,000
TOTAL: $1807000
* *A little over $40,000 is expected to be left in the Digester #2 project budget. This project has
been completed; however we are awaiting final bills on some City Furnished Equipment and
confirmation of quantities from the Contractor making the repairs. Digester #2 funding comes from
the same account, Major Equipment Maintenance, as the Clarifier funding. Staff recommends
moving this money into the Clarifier account to cover the additional costs expected with this
project. If additional funds are needed, staff will return to Council. The most likely source of
further funding will be the Major Equipment Maintenance account.
ATTACHMENT:
Specifications are available in the Council office for review.
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