HomeMy WebLinkAboutStaff Report 5.C 07/16/2012 1 Itenyv#5. G
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DATE'. July 16, 2012
TO: Honorable Mayor and Members of the City.Councifthrough City Manager
FROM Dan St: John, F:ASCE— Director, Public°Works'&Ut hies /49
Rem Scherzinger, RE. —Utilities Manager .
SUBJECT: Resolution.Authorizing the City Manager to Execute Amendment No 2 to the
Professional Services Agreement for Design Services for the Recycled Water
Pump Station Main and No.1 Improvements Project
RECOMMENDATION
It is recommended that'the City Council adopt the attached Resolution authorizing-the City
Manager to execute Amendment No 2 to the ProfessionalvServices Agreement for design
services to ArcSine Engineering, Inc. for the Recycled Water Pump Station Main and No:1
Improvements project.
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BACKGROUND
The City 01-Petaluma's,recycled water system was constructed in 1981 and expanded in 2009
with the completion of the Ellis Creek Water Recycling Facility(ECWRF);for tertiary treated
wastewater. The system consists of four pump stations and 12 miles of pipelines which currently
supplies water to over 850 acres of land. The system currently conveys secondary recycled
water from the oxidation ponds,at Lakeville Highway to agricultural land for irrigation of
vineyards, golf courses and agricultural lands. The tertiary portion of the system provides
irrigation and plant processing water to.the ECWRF. Duringthe dry,--weather season, May 1 —
October 31, the City is restricted from discharging into the Petaluma River and disinfected
—4 secondary water from the oxidation ponds is distributed.to recycled irrigation customers.
Recycled water accounts for upito 48%of the City's total annual effluent.
On December 20, 2010, the City Council awarded a Professional Design Services Agreement to
ArcSine Engineering, Inc.,(ArcSine) for the Recycled Water Pump Station Main and No.1
Improvements project. (Resolution No. 2010-222 N.C.S.)
Amendment No. 1 t extend,the,tertn of the agreement from December 31,2011;to December
31, 2012 was executed on February23, 2012.
Agenda Reviel:: -
City Attorn- V . Finance Director City Manager
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DISCUSSION -
The proposed;action'will allow'a,modification of theproject_:approach to accelerate the
development of tertiary treated recycled water use within Petaluma city limits, including an
increase in the amount of"potable water.offset?' credits, while improving delivery to existing •
agricultural users. The project will increase financial stability by eliminating the cost of
maintaining and operating bothithe secondary and tertiary recycled water systems by allowing
the secondary system to be shutdown. Staff evaluated the efficiencies of operating two recycled
water systems (secondary and tertiary) versus a single tertiary system•and concluded that the
City's recycled water'goals and the needs of all recycled water customers can be better serviced
by a single system. This advancement obviates certain capital projects conceived to maintain
two systems and'places into full operations elements of the mew Ellis Creek facility that have yet
to be fully utilized.
Earlier this year, City engineering, operations and maintenance staff assessed the entire recycled
water system operations and concluded that both the secondary and tertiary systems,should be
combined for overall efficiency of plant operation, maintenance and disposal of treated water.
This re-alignment reduces costs toithe Wastewater Funds by removing one of the two currently
operated systems and utilizes the Urban Recycled Water(URW) components'ofthe ECWRF as
the single producer of recycled water. While always planned to eventually convert the recycled
system to tertiary water produced by the URW, the subject project will accelerate that process
without impacting current agricultural users. The revised scope of work:incorporates the.
necessary modifications to shift operations fully to the URW and provides improvements not
originally•included in the project to the chlorine contact basins, and provides a means of draining
the recycled water mains and storage basin.
The Recycled Water Pump Station Improvements project involves mechanical, electrical and
instrumentation improvements to the Main Pump Station and Booster Pump Station No 1. Work
includes upgrades to existing electrical and mechanical systems to handle the design flows; and
integrates the pump stations with the instrumentation systems at the Ellis Creek Water Treatment
Facility. The existing electrical equipment and control systems'of these pump stations have been
operating for over 30 years and.have.become'unreliable.
Staff recommends the re-scoping to this project and execution of Amendment No. 2 to'ArcSine
in'the amount..of.$97,000 for design phase services.
The proposed action meets Council Goal: "Plan for and implement priority capital projects as
funding permits" and "Improve and enhance fiscal stability and'sustainability."
FINANCIAL IMPACTS
The total budget fof this'project (C66400902) is $3,341,000 for FY 12/13. This amendment will
increase the design services agreement by$97,000;• The revised construction cost estimate for
the revised project is estimated at $1,900,000, $354000below the original project construction
estimate. The overall savings to the project is approximately$257,000, including the additional
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the City will save an estimated,$72,300 per.year in reduced power'costs for pumping and
reduced labor for lab,operations and maintenance.
ATTACHMENTS •
1. Resolution
2. Amendment No. 2
3. Location Map
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Attachment 1
RESOLUTION AUTHORIZING THE CITY MANAGER TOEXECUTE
AMENDMENT NO 2 TO THE PROFESSIONAL SERVICES'AGREEMENT FOR
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DESIGN SERVICES FOR THE RECYCLED-WATER PUMP STATION
MAIN AND NO.1 IMPROVEMENTS PROJECT
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WHEREAS,.on December 20, 2010, City Council authorized execution of professional design
services agreement with ArcSine Engineering; Inc. (ArcSine) for design services; and
WHEREAS, the design commenced in February 2011 and proceeded to 95% design; and
WHEREAS, City Staff conducted an assessment of the entire recycled:water system operations;
and
WHEREAS, the proposed project modifications reduce costs to the Wastewater Funds by
removing one of the two current operations systems and utilizes the Urban Recycled Water
' Pump Station as the single producer of recycled water; and
WHEREAS, staff recommends the,City execute a professional services agreement with ArcSine
for electrical design services.:for the Recycled Water Pump Station Improvements Project;
NOW, THEREFORE, BE IT RESOLVED that the City Council of the City hereby:
1. Authorizes the.CitjManager to sign the attached Amendment No. 2 to the
Professional Services Agreement for Design Services with ArcSine in support the
Recycled Water Pump Station Main and No.1 Improvements Project in the amount
not to exceed $97,000.
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• Attachment.2
AMENDMENT NO. 2
TO..
Recycled Pump'Station Main.& No 1 Improvements
(C66400902-30360)
This Amendment No. 2 is hereby executed this day of , 2012.
THDAGREEMENT entered into and effective as of Jariaary 10,2011, by and between the City
of Petaluma,:;a municipal`corporation and a charter city (hereinafter referred to as "City") and.
ArcSine Engineering,Inc. (hereinafter referred to as"Consultant")is hereby amended as
follows:
1. The following sentence&is'added to the end of Section 1, "Services,"
In addition to the services described in Exhibit A, Consultant shall provide the additional
services described in Exhibit A-1 attached hereto.
2. The "Not-to-Exceed.Amount"specified in Section 2.A is'amended as follows:
Original Agreement Amount $ 338,400
Amendment No "2 $ 97,000
Total Not-to-Excccd Amount $ 435,400
IN WITNESS WHEREOF, the parties hereto have executed this document the day, month and
year first listed above.
CITY OF PETALUMA CONSULTANT
By
City Manager Name
ATTEST: • Gc4 7.-: N G,-A.yr-
Title
el SO E)ce
City Clerk Address
APPROVED AS TO FORM; Ceei n5 Ca- 9600 Z
City State _ Zip
/716y6
.City Attorney Taxpayer 1.D.-Number
USDrfJ � b
Petaluma Business Tax Certificate Number
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AMENDMENT TO PROFESSIONAL.SERVICES AGREEMENT(SCOPE,OF'WORK)(City)
(iManage#1668283)Februth/2011
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APPROVED:
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Department Director
APPROVED:
Risk Manager
APPROVED:
Finance Director
file name: S:\CIP\RECYCLED WATER\C66400902 RW Pump Stat ion.Upgrades\Agreements\ArcSine\Amendment No 2,doc
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AMENDMENT TO PROFESSIONAL SERVICES AGREEMENT(SCOPE OF WORK)(City)
(iYlanage#1668283)February 2011
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i Vim.
EXHIBIT "A-1"
SCOPE AMENDMENT'
CITY OF PETALUMA,;CALIFORNIA,
SECONDARY RECYCLED WATER PUMP STATION UPGRADES
DESIGN PROFESSIONAL SERVICES SCOPE
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ArcSine Project 0820/T10 June 26, 2012
This Scope of Work describes additions and deletions.to:the City of Petaluma Recycled Water
Pump Station Upgrades•project.
In the course of evaluation,preliminary design, and 95% design,•project stakeholders determined
that certain additions.and changes were warranted to achieve the following goals:
1. Provide adequate overall,lifespans of the facilities, without-major."mid-term" projects.
2. Correct additional problems discovered.
3. •Capture construction'cost.economies by constructing closely related improvements in
conjunction with this project, ratherthan deferring for a shorhinterval.
4. A critical evaluation process concluded,that the City's l esfcourse of action for disposal
of plant effluent(duringpetods where river discharge is not permitted) is to convey
• tertiary treated water. This:approach also meets the objective of being responsive to
needs of recycled,water customers.
This Scope Amendment is organized'under the'following-major headings:
A. MAIN PUMP STATION (4.3)
B. BOOSTER PUMP STATION NO. 4 (4.1) •
C. BOOSTER PUMP STATION NO. 2 (4,2)
D. HYDRANTS (TURNOUTS) (4.4)
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E. BROWN'S.LANE.PRV •
F. NO. 3 WATER PUMP STATION
G. URW PIPELINE
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H. OUTFALL CHEMICAL;FACILITIES
I. POLISHING PONDS PUMP STATION •
J. PROJECT OVERALL
K. PROGRAMMING (4.7)
L. SERVICES DURING..GONSTRUCTION (4.9)
A. MAIN PUMP STATION (4.3)
1. New Building,
a During;investigations, it was determined that the existing building is in poor
condition, and it has a limited lifespan. The building isalso subject to flooding. It
would thus be illogical to install all new equipment inside this building. •
b. The revised Scope includes'the following:
i. Design demolitionrof the existing building:
ii. Specify a new, prefabricated building. •
iii. Design new HVAC systems.
iv. Specify that structural drawings and calculations for the new building itself be
provided by the building supplier during.construction
2. StructurarEngineering
Structural engineering is by others. Coordinate drawings and requirements among
disciplines.
3. Rehabilitate Station=Discharge Piping And Valves
a The discharge piping system is in need of rehabilitation. Perform the following:
is Codrdinae.pipe ultrasonic testing.
ii. Perform a field valve-by-valve inventory with City staff. •
iii. Design valve replacements. Design related piping changes.
iv. Write specifications for pipe preparatiomand painting.
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4. Revise Pumping Arrangement
a. Evaluate, demolish pressurization iuhip: The pressurization pump does not appear to
perform a necessary function:
i.. ,Confirm thisrby evaluation of pump curves and VFD-operation.
ii: Design demolition of the pump.
iii.. Design demolition of pump concrete base and refinish.
iv: Define controls which achieve the pumping objective'without the pump.
b. Main pump station:will be removed from the Recycled Water distribution system, and .
its new function will be to recycle water from the CCB to Pond,l.
i. Use three pumps only
ii. Design soft starters for pumps to remain.
iii. Revise controls to accommodate soft starters.
iv. Revise valving.
v. Provide a,discharge point to the ponds.
5. Station/CCB'Area Lighting
a. Relight theCCB/Main outdoor area. Replace receptacles: Add new receptacles
where desired by City.staff.
6. Instrumentation
a. Replace pressure transmitter. Add low-Level float switch. Provide installation detail.
7. Monitor Sodium Hypochlorite Mixer
a. In the vicinity of Main'P-ump Station.is the sodium hypochlorite mixer, which is
standalone.
b. Investigate, and design modifications to add'status monitoring.
8. Intrusion:and Fire Monitoring.
a. Add intrusion monitoring, with hardwired override:timer. Add smoke/heat detection
This.will,be consistent-with provisions recently added to the City's `C' Street
Pumping Station. -
9. Other Improvements
a. Rehabilitate sample pump power connections. Add monitoring.
b. Replace/install grates'at the CCB and outfall structure:
c. Remove pedestal,;ananual operator, and gates,at Gates.7'and 8.
d. Demolish Pond 10 stilling well.
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e. Investigate and demolish washdown-pump,and contfol_panel.
f Refeed gate G-11 from the Chemical Building. .
B. BOOSTER PUMP STATION NO. 1 (4.1)
1. Station.Improvements
a. Provide a design of comprehensive station improvements including electrical,
mechanical, HVAC,andinstrumentation and control systems.
b. Participate with the City in meetings/workshops to decide the optimal way to convey
recycled water off site.. The result was to abandon this pump station.
c. Remove the station from the Recycled Water system.
C. BOOSTER PUMP STATION NO. 2(4.2)
1. Replace Selected Valves
a. Valves are in need of replacement. Perform the following:
i. For valve replacements, perform a field valve-by-valve inventory with City staff.
ii. Design replaceirients of puriip discharge check valves and isolation valves. Design
related piping changes.
2. Evaluate, Demolish Pressurization Pump
a. The pressurization pump does not appear to perform a necessary function.
i. Confirm this by evaluation of pump curves and VFD operation.
ii. Design demolition of the-pump. •
iii. Design demolition of pump concrete base and refinish.
iv. Define controls which achieve the pumping objective without the pump.
3. Replace HVAC
a. To.meet lifespan expectations, replace.the existing HVAC system.. Design ducting.
4. Intrusion And Fire Monitoring
a. Add intrusion monitoring, with hardwired override timers at each station. Add
smoke/heat detection: This will'be consistent with provisions recently added to the
City's''C"Street PumpingzStation.
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D. HYDRANTS((-TURNOUTS) (4.4)
1. Deleterfrom the project. (New CIP projects established in CIP12/13 cover replacement of
hydrants over 3-year period.)
E. BROWN'S LANE PRV
1. Add pressure;instrumentationand radio telemetry.
2. Design photovoltaic'or commercial'.power.
F. NO. 3 WATER PUMP STATION
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I. Background
a. The'WRF.Urban Recycled Water system consists of the lmg on site Recycled Water•
• Basin, the No 3 Water Pump Station for in-plant and future,off site demands, and the
URW pipeline for future=conveyance to off site demands The No 3 Water Pump
Station consists of two duty;and one standby verticalturbine can pumps, and one
skid-mounted, engine-driven, vertical turbine fire pump. Two'of the pumps are
constant speed.and thethird pump isVFD-controlled. Space is provided for an
additional motor-drivempump. -
b. Since the off site reservoir has not yet been constructed, the demand on the pumping
station is less than the capacity of a single pump. Accordingly, the pump station
operates in"Pressure Control Mode," and allows:only the VFD-controlled pump to
run'in AUTO mode. This,single pump is operating at a reduced speed, at less than
ideal efficiency., Furthermore, undercurrent conditions, failure of the VFD-driven
pump or VFD would require an operator to manually run a constant-speed pump to
supply 3-water to the plant until the VFD-driven pump can be brought back online.
c. Furthermore, in the course of optimizing the project; it.was,decided to use Plant No. 3
water as the sole,source of off-site recycled water, thereby, removing Main Pump
Station and Booster.Pump Station No 1 from this work. To,serve in this capacity,
and to ensure,reliability to meet in-plant demands, station improvements are needed.
2. Add A Jockey'Eunip.
a Add a VFD-driven jockey pump better Matched to in-plant demands. Add'strainer,
matching existing.
3. Replace Acro s-The-Line'Starters •
a. For the'two.ezistingpumps with across-the-line"starters, replace with VFDs-
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4. R-Revise Discharge Valves
a. Revise pressure regulating/relief/sustaining valves.if needed to ensure that offsite
demands do not starve in-plant uses. •
5: Instrumentation
a. Add flowmeter'and,pressure instruments.
G. URW PIPELINE
1. Design a permanent extension of the Urban Recycled''Water(URW)pipeline. Design will
include:
a. Excavation and shoring for the new underground URW pipeline,and valves.
b. Construction sequencing.
c. Connection of the URW pipeline to the distributionsystem in the vicinity of Booster
Pump Station No. 1. Provide a drain/flushing connection to Pond 1.
d. New valves in the URW pipeline to isolate pumping systems.
e. Flowmeter and vault.
H. OUTFALL CHEMICAL FACILITILES
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1. The chemical facilities.in support of the Petaluma River outfall have'a number of.
vulnerabilities. Correct the following:
a. Replace the existing, aging MCC.
b. Add.a new generator and transfer switch.
c. Feed G-11 from the new.MCC, and provide monitoring of G-11 to the PLC.
d. Relocate and replace chemical pumps and motor control.
e. Relocate and replace selected chemical pump piping.
f Close.off an existing doorway"that"causes flooding in the space.
g. Design'installation;of a new roll-up door..
h. Design installation of louvers.
i. Replace the.Chlorvac unit.
j. Design a small roof structure,over chemical equipment.
I. POLISHING PONDS PUMP STATION
1. Add turbidity monitoring.
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J. PROJECT OVERALL
1. Cost Estimating
a. Expand and update the constructioncost estimate:(including cost;evaluation_of
selected"alternatives).
2. Specifications
a. In'support.of the work above, add the required Specifications.
3. Drawings
. a. In support of the work above, add the required electrical, instrumentation,
mechanical, and'structural drawings.
4. Submittals
a: Because many items have been added to the project, two additional submittals are
required to allow for City review prior to publishing final documents.
K. •PROGRAMMING (7.0)
1. Programming for Tertiary recycled water delivery and other all design modifications will
be scoped and performed under a separate agreenient•afer project has gone to bid.
L. SERVICES DURING CONSTRUCTION (9.0)
a. Delete Services-During Construction.
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Attachment 3
RECYCLED WATER PUMP STATION, '
MAIN. AND No. 1 IMPROVEMENTS
PROJECT NUMBER 066400902
LOCATION MAP
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Ellis Creek
Water Recycling / OXIDATION PONDS•
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