HomeMy WebLinkAbout05/21/1996, C-9 - BELT FILTER PRESS RELOCATION PROJECT AT THE WATER RECLAMATION FACILITY council
May 21, 1996
acEnba Rep= "umb�C,9
CITY OF SAN LUIS O B I S P O
FROM: John Moss �`'� PREPARED BY: Dan Gilmore ( �(y
Utilities rector Utilities Engineer IM`
SUBJECT: Belt Filter Press Relocation Project at the Water Reclamation Facility
CAO RECOMMENDATION:
By motion, 1) approve the plans and specifications for the Belt Filter Press Relocation Project,
2) appropriate an additional $130,000 to the project budget, and 3) authorize the CAO to award
if the low bid is within the engineer's estimate.
DISCUSSION:
In March of 1993, the City purchased a used, trailer mounted belt filter press for dewatering
digested wastewater sludge at the Water Reclamation Facility. It was determined that the sludge
drying beds by themselves did not have adequate capacity for dewatering sludge, particularly in
the rainy season. The belt filter press is presently housed in a trailer that is badly corroded and
inhibits access for operation and maintenance. The current belt filter press configuration results
in difficult maintenance, inefficient operations, and unsafe conditions. In addition, the lack of
protection from stormwater creates problems for both the equipment and the dewatered sludge.
This project involves the construction of a permanent pad mount for the belt filter press and
related equipment. The facility will include all the necessary piping, a building to shield the belt
filter press and equipment from weather and visual impacts, and a cover extending over the
sludge drying/storage bed. Construction is expected to take 8-10 weeks.
FISCAL EMPACT:
The engineer's estimate for this phase of the proposed project is $350,000. The design phase was
$35,000, and an emergency parts purchase during the holidays was $9,800. The total estimated
project cost is $394,800. A total of $300,000 was approved for the design and construction of
the belt filter press in the 1995-97 Financial Plan (Appendix B, pages 63-64). Less the design
and emergency expenses, a total of $255,200 remains to support this project. Based on the
engineer's estimate, an additional $94,800 may be needed to support this project. Staffs original
preliminary estimate of $300,000 did not fully anticipate the complexity of this project. The
project was designed by Brown & Caldwell, recognized experts in the field of wastewater
engineering. The revised project estimate accurately reflects the cost to complete this complex
project and a significant effort by staff and the design consultant to control costs. The
recommendation to appropriate an additional $130,000 includes this amount plus a construction
contingency of approximately 10%. The additional amount will be included in the Sewer Fund
analysis to be considered by Council in May 1996. The Sewer Fund has adequate reserves to
finance the project due to the equity share contribution from Cal Poly for the recent Water
Reclamation Facility upgrades. The following table illustrates the cost issues mentioned above:
(Plans and specifications are available in the Council office- for review)
Council.Agenda Report- Title of`Repoit
Page 2
Proposed
BellMer_P�ess ApprovedAn i ipafPd A_dd_UP-nai
Design 35.000 35;000 0
Emergency Parts 9.800 9,800 0
Construction.
255:200 385.000 130.000
Total $300,000 $429.800 4130:000
e:Wen�cerWellPrts cep
�- 9-2