HomeMy WebLinkAbout5/16/2001 - STAFF REPORTS (5) y
DATE: May 16, 2001
TO: City Council
FROM: Assistant City Manager- Special Projects
City Engineer
WASTEWATER TREATMENT PLANT IMPROVEMENT PROGRAM
RECOMMENDATION:
That the City Council approve undertaking of capital projects at the wastewater
treatment plantfor 1) belt filter press 2) headworks rehabilitation 3) replacement of
primary clarifier mechanisms 4) Relocate trickling filter recirculation line and 5)
primary clarifier covers and odor control and direct US Filter Operating Services
Incorporated (USFOS) to begin the process of design implementation and
construction under the terms of Section 5.3, Capital Projects, of the Wastewater
Services (O & M) Agreement between USFOS and the City
SUMMARY:
USFOS has identified five capital projects that are termed critical and high priority
in orderto meet effluent specifications in the nearfuture as well as to improve plant
reliability and efficiency. The total cost of the five capital projects is $2,823,000.00.
The projects will be designed and constructed by USFOS. USFOS will, in addition
to their own forces, employ several sub-consultants for the work. Under terms of
Section 7.1 of the City's agreement with USFOS, it is anticipated that at the
completion of these capital projects the O & M fee will not change because the City
will be directly paying for these capital projects and they will not be financed by
USFOS.
BACKGROUND:
The City of Palm Springs entered into an agreement with USFOS in July 1999 to
provide for operation and maintenanceat the WastewaterTreatment Plant. Included
in the agreement is a provision for capital projects which are defined as a permanent
physical expansion,addition or improvementto the treatment facility or the sewage
collection system. Under terms of Section 5.3 of said agreement, USFOS has
provided notice to the City of several Needed Capital Projects. A Needed Capital
Project is defined in the agreement as one that is either directly a result of a
change of law or in order for the treatment facility to produce effluent meeting
specifications.
A second category of capital projects which USFOS identifies in their notice are
defined as Desirable Capital Projects in the agreement. These are capital projects
which would improvethe efficiency,performance,orreliabilityof the treatment faciIity
or the sewage collection system. USFOS has provided the City with notice
concerning the following capital projects:
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Wastewater Treatment Plant Improvement
May 16, 2001
Page 2
1. Critical Project- Install belt filter press to provide adequate dewatering capacity.
Currently all sludge generated at the plant must be dewatered using solar drying
beds. While the capacity of this process is adequate most of the year, in the event
of a moderatelywet winter this methodwill no longer be sufficient for the anticipated
winter sludge production levels. It is critical that additional dewatering capability be
added at this time to insure that the plant has the ability to dewater all solids through
winter months. This project will provide a portable trailer mounted belt filter press
to dewater sludge only when the drying bed capacity has been fully utilized. The
ordertime for this equipmentis approximately six months and the total installed price
is $700,000.00.
2. High Priority Project- Headworks Improvements
This work will consist of providing and installing a new barscreen and compactor as
well as a grit screw and trough. The existing barscreen washer is not capable of
separating all material from the screenings,which leaves the material unsuitable for
usual disposal methods. In addition, the existing compactor cannot meet the
required 50% solids concentration required by the landfill operator. Replacement of
this unit with the new screen compactor and washer will ensure that material taken
to a landfill will meet requirements. In addition,the existing grit screw and trough has
had to be repaired numerous times due to overloading. When this occurs the
system must be taken out of service, which in turn leads to more grit passing into
the primary clarifiers resulting in extreme wear on the pumps. This proposal
involves replacing the existing grit screw and trough with a new grit screw and
slightly larger trough to provide more reliable service and therefor reduce the grit
passing into the treatment system. Total installed price is $222,000.00.
3. High Priority Project- Primary Clarifier Sludge Collectors
Each primary clarifier is currently equipped with a sludge removal mechanism driven
by a cable and pulley system. This system is incapable of handling the greater
quantities of primary sludge which have been created with the current addition of
ferric chloride at the headworks. With the primary goal of reducing the volume of
material to the trickling filters and secondary treatment system, removal of more
sludge in the primary treatment system is required. In order for this to occur a new
sludge collector and skimmer that can handle these greater quantities of primary
sludge is required. Total installed price for the sludge collectors, for the three
primary clarifiers, including design and installation is $666,000.00.
4. High Priority Project- Primary Clarifiers, Odor Control
Compliancewith odorcontrol requirements is proposedto be achived atthe primary
clarifiers through installation of covers and a ventilation system through an odor
control scrubber. Currently a chemical masking agent is sprayed at the periphery
of the primaries to prevent off-site odors, however this has not been completely
effective. This project would include installation of aluminum covers on the primary
clarifiers. The air space between the water surface and the covers will be ventilated
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Wastewater Treatment Plant Improvement
May 16, 2001
Page 3
with the air flowing through an odor control scrubbersystem removing the organic
compounds that produce the odors via chemical neutralization means. The price
for the covers and odor control system is $813,000,00.
5. Priority Project- Relocate Trickling Filter Recirculation Line
Presently the trickling filter recirculation flow passes through the secondary clarifiers,
thereby increasing their hydraulic loading and reducing capacity. Treatment
removal limits may therefore be reduced. Relocating the line so the flow is taken off
priorto the clarifiers,ensures compliancewith mandated treatment levels under high
in flow conditions. The price for this work is $422,000.
With the exception of the primary clarifier covers and the belt press all of the equipment is
proposed to be US Filter manufactured products. In order to verify that USFOS quoted
prices are competitive with other similar products on the market, staff preformed an
extensive investigation. Investigations were made with the Coombs Hopkins Company,
representative of Parkson who manufactures a competitor barscreen and washer. Staff
also contacted Dual] Division of the MetPro Corporation, manufacturer of competitor odor
control systems. Staff also contacted Polychem Corporation, manufacturer of competitor
primary clarifier sludge collectors. Polychem would not provide a price quotation for their
equipment;however,price quotations from both Coombs Hopkins and Duall indicatethatthe
price for the US Filter equipment is significantly lower. With respect to the belt press, the
US Filter equipment is similar in cost to that manufactured by BDP Industries. However,
the BDP product is specifically made to be a portable trailer mounted product and staff has
recommended, with the concurrance of US Filter, that the BDP product be used.
Staff recommends that Council direct USFOS to proceed with the Needed Capital Project
numbers 1 and 4 and the Desirable Capital Projects numbers 2, 3, and 5 as defined in the
O &M Agreementwith USFOS. These have been identified as critically needed in the case
of project number 1 and high priority or priority projects inthe case of numbers 2, 3, 4, and
5 by USFOS in correspondence to the City. Total costs for the projects is $2,823,000.00.
Sufficient funds exist in Wastewater Treatment Plant Account No. 420-6810-57013 (Plant
Upgrades) for this work.
Although none of these capital projects increase plant capacity in and of themselves,when
plant capacity is increased in the future, these projects will not have to be replaced as they
are all hydraulically sized for the future needs of the plant. This work will also include
painting and possible landscaping in order to minimize any off-site visual impacts.
Allen F Smoot David J. Barakian
Assistant City Manager-Special Projects City Engineer
APPROVED:
ATTACHMENT:
1. Resolution REVIEWED BY DEPT.OF FINANCE
� A 3 _ .
RESOLUTION NO. 20044
OF THE CITY COUNCIL OF THE CITY OF
PALM SPRINGS,CALIFORNIA,APPROVING
THE WASTEWATER TREATMENT PLANT
IMPROVEMENT PROGRAM
WHEREAS, the City of Palm Springs entered into an agreement with US Filter Operating
Services(USFOS) in July 1999to provide for operation and maintenance at the Wastewater
Treatment Plant; and
WHEREAS, USFOS has identified five capital projects that are termed critical and high
priority in order to meet effluent specifications in the near future as well as to improve plant
reliability and efficiency;
NOW THEREFORE BE IT RESOLVED by the City Council of the City of Palm Springs as
follows:
City Council does herebyapprove undertakingthe following Capital Projects,direct, USFOS
to design and construct them underthe Terms of Section 5.3 of the City's O&M Agreement
with USFOS for the following lump sum prices:
1. Belt Filter Press - $700,000.00
2. Headworks Improvements - $222,000.00
3. Primary Clarifier Sludge Collectors - $666,000.00
4. Primary Clarifier- Odor Control - $813,000.00
5. Trickling Filter Recirculation Line
Relocation - $422,000.00
Total $2,823,000.00
ADOPTED this 16th day of May , 2001.
AYES: Members Hodges, Jones, Reller-Spurgin and Mayor pro tem Oden
NOES: None
ABSENT: Mayor Rleindienst
ATTEST:
CITY OF PALM SPRINGS, CALIFORNIA
By
City Clerk City Manager
APPROVED AS TO FORM:
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