HomeMy WebLinkAbout11/18/2003, BUS 3 - PRELIMINARY DESIGN REPORT FOR WATER TREATMENT PLANT MASTER PLAN IMPROVEMENTS council Nov. 18, 2003
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C I TY O F SAN L U I S OBISPO
FROM: John Moss, Utilities Director,,
Prepared By: Gary Hender , Water Division Manager -:*--J4
SUBJECT: PREL 41NARY DESIGN REPORT FOR WATER TREATMENT
PLANT MASTER PLAN IMPROVEMENTS
CAO RECOMMENDATION
1. Approve the project components recommended for inclusion in the final design of
improvements for the Water Treatment Plant Improvement Project.
2. Approve the amendment to the contract with Black and Veatch for Phase II services
for the design of the recommended improvements at the Water Treatment Plant for an
additional amount not to exceed$519,680.
3. Authorized the Utilities Director to approve additional compensation for an amount
not to exceed $53,029.
4. Authorize the transfer of$375,109 from Water Fund Working Capital to the project
account.
REPORT-IN-BRIEF
In October 2000, Boyle Engineering Corporation completed the City's Water System Master
Plan (Master Plan). The Master Plan included the following recommended improvements at the
WaterTreatment Plant:
A. Seismic evaluation of the existing water storage tanks
B. Addition of a second treated water storage tank(clearwell)
C. Upgrades to the transfer pump station
D. A new pipeline to serve the Water Treatment Plant from Reservoir#2
E. An additional sedimentation basin
The consulting firm of Black and Veatch was selected by the City to prepare the preliminary
design report (PDR) for the recommended improvements. The purpose of the PDR is to evaluate
the recommendations identified in the Master Plan and develop the preliminary design and cost
estimates for recommended improvements at the site. The improvements are intended to
enhance the plant's ability to meet future water supply demands, improve operational
capabilities, and ensure that the facilities perform adequately following a seismic event.
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The major improvements recommended in the PDR are shown below:
A. Demolish existing 4.0 million gallon (mg) treated water storage tank and construct new
3.0 mg replacement tank.
B. Construct second 2.0 mg water storage tank
C. Replace existing Transfer Pump Station with new pump station located at the Water
Treatment Plant site.
D. Seismic upgrades for the washwater storage tank.
E. Provide plant water supply from Reservoir#2
The total construction cost for all of the recommended improvements is estimated to be
$4,476,748. This includes additional items which were identified during the development of the
preliminary design report. The total construction cost also includes a 30% contingency.
To proceed with the recommended improvements, staff recommends approval of the amendment
to the contract with Black and Veatch for preparation of the final plans and specifications and
completion of the environmental documentation. In addition, additional analysis associated with
the potential for reactivation of the Stenner Canyon Hydroelectric Plant (covered under separate
Council agenda report) is included in the recommended scope of work and the associated
compensation.
The implementation of the recommended improvements identified in this report will ensure that
the City's Water Treatment Plant will continue to provide safe and reliable water supplies to
meet the City's demands well into the future.
DISCUSSION
Background
Several years ago, in conjunction with the development of the Airport Area Specific Plan, the
City of San Luis Obispo initiated the development of a Water System Master Plan. The Master
Plan was prepared by Boyle Engineering Corporation through subcontract with Wallace,Roberts,
and Todd (the lead consultant for the Airport Area Specific Plan). The overall purpose of the
Master Plan was to evaluate the existing raw water delivery facilities, the water treatment plant,
and the water distribution system to identify existing deficiencies and necessary improvements
needed to meet both existing water service demands as well as those at full build-out as identified
in the City's General Plan.
The Master Plan identified the following improvements and studies to ensure reliable operation
of the Water Treatment Plant to meet current and future city water demands.
A. Seismic evaluation of the existing water storage tanks
B. Addition of a second treated water storage tank (clearwell)
C. Upgrades to the transfer pump station
D. A new pipeline to serve the Water Treatment Plant from Reservoir#2
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E. The need for an additional sedimentation basin
On January 30, 2003, the City Council approved the scope of work and contract with Black and
Veatch for preparation of the preliminary design report for recommended improvements to the
Water Treatment Plant. This report will present the findings of the consultant's evaluation of the
improvements recommended in the earlier Boyle study as well as additional items that have
surfaced during project stakeholder meetings which included the consultants and operations,
maintenance and management staff of the Utilities Department. The scope of work also included
an evaluation of the potential to reactivate the existing Stenner Canyon Hydroelectric Facility.
The hydroplant evaluation is presented as a separate agenda item.
Purpose
The purpose of the Preliminary Design Report (PDR) for the Water Treatment Plant (WTP)
Improvement Project is to evaluate the recommendations identified in the Master Plan and
develop the preliminary design and cost estimates for recommended improvements. The
improvements are intended to enhance the plant's ability to meet future water supply demands,
improve operational capabilities, and ensure that the facilities perform adequately following a
seismic event.
Treated Water Storage
The largest capital cost item identified in the Master Plan is the need for an additional treated
water storage tank (clearwell) at the WTP. The WTP currently has one 4.0 million gallon (mg)
clearwell which was installed in 1964 when the WTP was originally constructed. The clearwell
does not meet current seismic design criteria and is in a deteriorated condition. Most water
treatment plants have two tanks onsite for treated water storage to allow one tank to be taken out
of service for maintenance or repairs, while the other tank provides minimum operating storage
for the facility. The Master Plan recommended construction of a second 4.0 mg storage facility.
An evaluation of the total onsite storage required was undertaken to determine whether 8.0 mg
was ncessary for plant operations at future City build out water demands. The evaluation
determined that 4.0 mg was the minimum required onsite storage for long-term operation of the
facility. Additional analysis was performed to determine what the minimum short term storage
needs would be to allow maintenance or repair of either tank. It was determined that 2 mg of
storage would be sufficient to allow maintenance to be undertaken.
Five alternatives were evaluated relative to providing the necessary onsite storage. These
alternatives are discussed in detail in the PDR on page 19. The alternatives ranged from
constructing a temporary tank and replacing the existing 4.0 mg tank (with a new tank with two
separate cells) to demolition of the existing tank and construction of a 3.0 mg replacement tank
and a new 2.0 mg tank. The costs of the various alternatives ranged from $1.6 million to $2.1
million (Table 2-5 of the PDR). While the minimum storage for the plant operations was
identified as 4.0 mg, the alternative which would provide 5.0 mg of onsite storage (one 3.0 mg
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replacement tank and one new 2.0 mg tank) is recommended because it will provide additional
capacity and redundancy while not significantly increasing construction costs.
Transfer Pump Station
The existing transfer pump station is located approximately '/z mile from the WTP on Stenner
Canyon Road. The pump station provides water to Reservoir#2 and the high pressure portion of
the City's water distribution system. The high pressure zone currently provides water to
approximately one third of the City water customers. The pump station is located on a small
parcel of land which is owned by the City and is surrounded by property owned by the State of
California (Cal Poly). The Master Plan recommended replacement of the three existing pumps
and motors, as well as replacement of other equipment and piping within the exiting building.
The pump station was originally constructed in 1964 when the WTP was constructed. The
existing pumps and motors are very inefficient and have inadequate capacity to serve future
water demands.
During project stakeholder meetings, it was determined that essentially all of the equipment
within the existing pump station would need to be upgraded as part of the project. In addition, it
is recommended that the new facility include 4 pumps to meet projected water demands and
provide operational flexibility in the future. The pump station's maximum capacity is designed
for three pumps operating and one as a backup. This is industry standard to insure system
reliability and allow for maintenance and repair of one pump while the others are in service.
Following the determination of the upgrades necessary for the pump station, an evaluation of site
alternatives was undertaken. Since the existing pump station needs to remain in service until the
new pump station is constructed, the consultants considered construction of a new pump station
adjacent to the existing site as well as relocating the pump station to the WTP. It was determined
that with the construction of the new storage tank at the WTP there will be available space to
locate a new pump station adjacent the tank. The new site is preferable because of the
availability of land currently owned by the City, increased security and proximity to the WTP
operations and maintenance staff.
Washwater Storage Tank
There are two washwater tanks at the WTP that are used to backwash the filters. The newer tank
was constructed as part of the WTP Upgrade Project that was completed in 1994. The other tank
was constructed in 1964 and was evaluated to identify upgrades necessary to meet current
seismic design standards. In addition to the recommended seismic upgrades, it is recommended
that the interior coating of the tank be removed and recoated and that a new cathodic protection
system be installed to extend the life of the tank. The exterior of the tank was recoated 10 years
ago and appears to be in good condition. The condition of the tank exterior will be further
evaluated during the final design phase to determine if any additional action is warranted at this
time.
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Washwater Reclamation Junction Box
The existing facility that allows diversion of washwater from the filters to the two reclamation
basins has operational deficiencies which cause overflows of the junction box. To correct these
deficiencies, the Master Plan recommended extending the walls 6 to 8 feet above grade. Upon
more detailed evaluation, it was determined that a more cost effective approach would involve
demolition of the open junction box structure and construction of a closed pipe diversion system.
This solution will cost significantly less than raising the walls of the existing junction structure
and will considerably simplify operations.
Plant Water Supply
The current water plant onsite pump station includes two plant service water pumps, two
washwater pumps, one fire pump, and two washwater treatment supply pumps. The pumps that
provide treated water for plant water service, ozone cooling system and washwater require a
substantial amount of maintenance, have improper motor design and are difficult to obtain parts
for repair due to the age of the pumps.
A study was conducted to evaluate the feasibility of serving the plant water supply from
Reservoir #2 and the High Pressure Zone to allow the aging equipment to be decommissioned.
In addition, service from Reservoir#2 (7.5 mg) will provide a reliable, gravity-fed supply to meet
onsite plant water needs. The analysis also revealed that there is not adequate pressure available
from Reservoir #2 to meet the requirements for the ozone building fire sprinkler system, so the
fire pump will be retained. Since the fire pump was installed in 1994 as part of the last upgrade
project, the pump meets current design criteria and does not require significant maintenance.
The recommendation is to abandon the service water pumps onsite and provide water for plant
operations from Reservoir#2.
Treatment Process Improvements
The City Water Treatment Plant has a design capacity of 16 million gallons per day (mgd). To
achieve this capacity, the plant needs to be operated in a split flow manner with water from
Whale Rock bypassing the sedimentation process. The existing sedimentation basin has a design
capacity of 8 mgd and the Master Plan recommended that an additional sedimentation basin be
considered. The Master Plan estimated the cost for a new sedimentation basin to be $1.3 million
in 2000. Due to limited site locations and adverse geological conditions, the actual costs may be
significantly higher than this estimate.
As part of the PDR, a plant performance test was initiated to evaluate the performance of the
plant at full 16 mgd capacity with split flow operation. The test was conducted on a Sunday and
confirmed that the plant can hydraulically handle the 16 mgd flow rate even with one filter out of
service for backwashing (cleaning). The test was scheduled to last a minimum of 4 hours but due
to a power outage in Cayucos, the test was discontinued after three hours. The test did reveal
some potential questions relative to the ability of the plant to effectively and reliably operate at
these high flow rates for extended periods of time. Bypassing the sedimentation basin with the
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Council Agenda Report—Water Treatment Plant Preliminary Design Report
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water from Whale Rock will "load up" the filters in a shorter period of time which will require
more backwashes. Long-term operation of the treatment plant with direct filtration of Whale
Rock may not remain a viable option.
To increase the sedimentation capacity, a new sedimentation process was recommended by Black
and Veatch for the City's consideration. The process is called "Actiflo" and is manufactured by
U.S. Filter. This process utilizes sand as a "ballast" to rapidly settle out material from the raw
water. The Actiflo pretreatment system would be capable of providing a reliable treatment
process for the full 16 mgd plant capacity, with limited space requirements and simplified plant
operation. It may also be able to reduce the amount of ozone used for primary disinfectant which
could result in long term savings in operation costs. The process is being used at a number of
existing treatment plants and is being planned for many treatment plant upgrades around the
United States.
Staff would recommend further evaluation of the potential benefits of utilizing this enhanced
pretreatment process during the next phase of this project. In addition, a small scale pilot test of
the equipment with our raw water may be warranted following the cost/benefit evaluation.. U.S.
Filter has a portable small scale facility that can be brought onsite to test the effectiveness on our
raw water sources. The cost for the rental of the portable facility from U.S. Filter is $58,000 for
a five-week test. Black and Veatch support services and analysis brings the total cost to $76,185
for the pilot plant study. These costs are not included in the contract amendment with Black and
Veatch. Staff will return to Council following.the cost/benefit evaluation for recommendations
relative to the Actiflo process and authorization for the additional compensation of$76,185.
Additional Items
During meetings relative
to the development of the Table 1: Additional Items Construction Costs
PDR for Master Plan Description Total
improvements, a number _-_p—
A. Ozone building HVAC system $12,500
of additional items and B. Upgrade fluoride feed system $12,000
improvements were C.New Cal Poly vault, valve&meter $55,156
identified by staff for D. New HVAC system for filter building $12,320
potential consideration.
Appendix F of the PDR E. Replace Washwater drain line $9,250
lists 17 different potential F. Repair drain line across entry road $6,250
projects that were deemed G. Construct"erosion control"retaining wall $8,809
appropriate for H. Repair slope erosion below basins $3,500
consideration and Black I. Install ventilation system in chemical $14,000
and Veatch developed Building
preliminary cost estimates J. Automate washwater pump operation $10,500
for each. Based on an TOTAL $144,285
evaluation by staff of the -- -
cost/benefit of each item, staff would recommend that the items shown in Table 1 be included in
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the project design. Table 1 also includes the estimated construction costs without the 30%
contingency factor.
Environmental Documentation
An initial study was prepared as part of the work scope for development of the PDR. There were
some mitigation measures proposed to reduce potential impacts to a level of insignificance. The
initial study only involved those improvements originally identified in the Water Master Plan.
The additional items that have surfaced during preliminary project design discussions may
require some addition evaluation. Following Council's direction on the scope of the project, a
complete project description will be developed and additional environmental evaluation will be
undertaken.
Phase 77 Contract for Final Design
Attachment 1 is the amendment to the contract with Black and Veatch for Phase II. The scope of
work for Phase II is shown in Exhibit A of the contract and is summarized below:
1. Geotechnical investigation and evaluation
2. Environmental documentation
3. Preparation of plans and specifications for recommended improvements
4. Additional work associated with the Stenner Canyon Hydroelectric facility
project (discussed under separate agenda report).
Summary
The implementation of the recommended improvements identified in this report will ensure that
the City's Water Treatment Plant will continue to provide safe and reliable water supplies to
meet the City's demands well into the future.
FISCAL IMPACT
The Water Treatment Plant Master Plan Implementation Project was identified in the 2003-05
Financial Plan, Appendix B, Pages 61-63. The financial plan request estimated $197,600 for
final design and environmental documentation. The cost associated with the amendment to the
contract with Black and Veatch for Phase II of the project is $519,680. In addition, a design
contingency amount of $53,029 is recommended, to be authorized for use by the Utilities
Director, for improvements that require additional evaluation and scoping prior to final design.
An additional $375,109 will need to be appropriated from Water Fund Working Capital to
support the Phase II contract. There is sufficient available working capital in the Water Fund to
fund the contract and still meet minimum reserve policy levels.
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Table 2 below identifies the current estimated construction costs for each of the major
components of the project.
Table 2: Construction Cost Estimates
Description Total
General Conditions $313,060
Clearwell No. 1 $1,091,335
Clearwell No. 2 $899,018
Transfer Pump Station $635,352
Washwater Tank $118,202
Plant Water Supply $21,300
Backwash Wastewater Junction Box $62,350
Pipeline $158,750
Additional Items $144,285
Subtotal $394439652
Risk Contingency (30%) $19033,096
TOTAL $4,476,748
ALTERNATIVES
1. Modify Work Scope of the Project: Staff believes that the proposed project scope will
provide the proper facilities to ensure that the City can meet water quality standards into
the future and provide reliable water service to the community. Staff recommends the
project work scope is appropriate and necessary, however staff is prepared to discuss any
scoping changes Council may desire and incorporate those changes into the contract
agreement.
ATTACHMENT:
1. Amendment to Agreement for Consultant Services with Black and Veatch
* Full copy of the Water Treatment Plant Preliminary Design Report is in the Council reading
file.
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ATTACHMENT 1
AMENDMENT 1 TO AGREEMENT
THIS AMENDMENT TO AGREEMENT is made and entered in the City of San Luis Obispo on this
day of by and between the CITY OF SAN LUIS OBISPO,a municipal
corporation,herein after referred to as City,and BLACK AND VEATCH,hereinafter referred tows Consultant.
WITNESSETH:
WHEREAS,on February 26, 2003 the City entered into an Agreement with Consultant for preparation of
the preliminary design report for the Water Treatment Improvement Project;and
WHEREAS, the City desires to amend the scope of services to include additional analysis and preparation
of final plans and specifications for the Water Treatment Plant Improvements and Consultant has submitted a
proposal for this purpose that is acceptable to the City.
NOW THEREFORE, in consideration of their mutual promises, obligations and covenants hereinafter
contained,the parties hereto agree as follows:
1. The scope of services is hereby amended asset forth in Exhibit A attached hereto.
2. For providing the services as specified in Exhibit, City will pay and Consultant shall receive
additional compensation of$519,680 for a total sum not to exceed$750,615.
3. For providing additional design services associated with Subtask 810,additional compensation not
to exceed$53,029 may be authorized in writing by the City's Utilities Director.
4. All other terms and conditions of the Agreement remain in full force and effect.
IN WITNESS WHEREOF, the parties hereto have caused this instrument to be executed the day and year
first written above.
ATTEST: CITY OF SAN LUIS OBISPO
By:
Lee Price,City Clerk David F.Romero,Mayor
APPROVED AS TO FORM: CONSULTANT
a, .
Iona ' well,City Attorney
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1
EXHIBIT A
SAN LUIS OBISPO WTP IMPROVEMENT PROJECT
AMENDMENT 1
OWNER: City of San Luis Obispo
CONSULTANT: Black & Veatch Corporation
PROJECT: Water Treatment Plant Improvements Project,
Specification No. 90225
PURPOSE
The following is an amendment the contract signed on February 26, 2003, between the
City of San Luis Obispo and Black & Veatch Corporation. The Consultant's obligations
are amended according to the following "Scope of Work" section.The City's obligations
are amended according to the"Compensation" section at the end of this amendment. All
other terms and conditions of the original contract apply.
SCOPE OF WORK
This amendment replaces the scope of work for Exhibit A, Task 500, WTP Detailed
Design, of the original contract and provides for additional tasks to be completed under
Task 730, Stenner Canyon Hydroelectric Feasibility Study - Additional Evaluations, and
Task 800, Additional Project Components.
Task 500-WTP Detailed Design-Phase II
The tasks and deliverables described below apply to each project element for which bid
documents are anticipated to be prepared. The project includes the components described
in the Preliminary Design Report (PDR), dated October 17, 2003, and several additional
components described below.
The project components outlined in the PDR include:
• New 2 million gallon (mg) clearwell on hillside of sludge ponds, including piping
and appurtenances, relocated septic system and leach fields, and retaining wall.
• New 3 mg clearwell on site of existing clearwell (to be demolished), including
demolition plans,piping, and appurtenances.
• New Transfer Pump Station, to be located on the WTP site, including piping and
appurtenances, and site landscaping.
• Components required to serve onsite plant water demand from Reservoir No. 2,
including piping,valving, and demolition plans.
• Seismic upgrade and relining of 180,000-gallon wash water tank.
• Piping and valving modifications to existing wash water control structure.
• Demolition of existing Transfer Pump Station.
SLD-Phase 11 FINAL 10.
EXHIBIT A
i l City of San Luis Obispo B&V Project 132365
WTP Improvement Project November 2003
The additional project components (not covered in the PDR) undergoing detailed design
are as follows:
• Cal Poly Raw Water Line Improvements
• Washwater Basin Drain Line
• Sludge Pond Underdrain Improvements
• Slope Repairs
• Washwater Treatment System Evaluation
• Paving Improvements
These project components will undergo the same detailed design process as the
components included in the PDR, as outlined in Tasks 505 through 535. Refer to Tasks
550 through 580 for scope and budget assumptions for these additional project
components.
Subtask 505. Monthly Status Report and Project Invoices
During Phase H,project invoices will be submitted monthly accompanied by a project status
report documenting key activities of the previous and upcoming months, project action
items,project expenditures, and project schedule updates.
Deliverables: 1 copy of Status Report and Project Invoice each month for the
duration of the phase (4 months).
Subtask 510. Progress Meetings/Coordination
During Phase H, continual communication and coordination of activities will be maintained
with the City. Regular meetings will be conducted with the City to review progress and
exchange ideas and information.
Assumptions: 3 Progress Meetings are assumed for this phase.
Deliverables: Draft Meeting Agenda(3 days before meeting).
Meeting Agenda-copies as required.
Meeting Minutes (within 1 week following meeting) — copies as
required.
Subtask 515. 30%Design Submittal
Develop drawings and specifications to approximately 30% completion. Specifications
will include a Table of Contents, all standard specification sections, and draft sections for
major engineered equipment systems. Under this subtask, survey work will be
conducted, through a subcontract, to supplement available topographical survey data and
to identify locations (horizontal and vertical) of key connection points.
SLA-Phase II FINAL 2
EXHMIT A
City of San Luis Obispo B&V Project 132365
WTP Improvement Project November 2003
Submit 5 copies for review.
Deliverables: 30% Half-Size Drawing Set (5 copies).
Technical Specifications (5 copies).
Subtask 520. 50%Design Submittal
Develop drawings and specifications to approximately 50% completion. All major
drawings and specifications will be represented and will reflect in-house quality control
comments. A progress cost estimate will be provided with this submittal.
Submit 5 copies for review.
Deliverables: 50% Half-Size Drawing Set (5 copies).
Technical Specifications (5 copies).
Subtask 525. 90%Design Submittal
Develop drawings and specifications to approximately 90% completion. All drawings
and specifications will be "engineering complete" and will reflect in-house quality control
comments. An updated cost estimate will be provided with this submittal.
Deliverables: 90% Half-Size Drawing Set (5 copies).
Technical Specifications(5 copies).
Subtask 530. 100%Design Submittal
Incorporate City comments into the drawings and specifications, and provide a final
submittal.
Deliverables: Final Construction Drawings (Vellum Full-Size Drawings, 1 copy).
Technical Specifications.
Subtask 535. City Council/Architectural Review Commission Presentation
Project status and design recommendations will be presented to:
• City Council and Architectural Review Commission during the Final Design
Phase
Assumptions: Up to 20 Microsoft PowerPoint slides will be prepared for each
presentation.
Deliverables: Presentation Materials for Presentation.
Subtask 540. Credit for Preliminary Design of Transfer Pump Station
The budget for this task provides for credit to Consultant for preliminary design work
sw-Phase a Fant. 3 0.
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EXHIBIT A
i City of San Luis Obispo B&V Project 132365
WTP Improvement Project November 2003
related to the new transfer pump station, which was not included in original Task 200
scope of work.
Subtask 545. Credit for Deletion of Transfer Pump Station Pump/Motor Replacement
and Clearwell No .] Seismic Upgrade
The budget for this task provides for credit to City for detailed design work related to the
replacement of pumps and motors at the existing transfer pump station and the seismic
rehabilitation of the existing clearwell. This detailed design work is not longer required
because these facilities will be demolished.
Task 550—WTP Detailed Design—Plant-Wide Improvements—Phase II
Subtask 555. Cal Poly Raw Water Line Improvements
New flow meter and motorized valve installed in a new buried vault on the Cal Poly raw
water pipeline.
Subtask 560. Washwater Basin Drain Line
Repairs and/or replacement of the drain line from the Washwater Basins to the drainage
swale near the existing clearwell.
Subtask 565. Sludge Pond Underdrain Improvements:
Repairs and/or replacement of the Sludge Pond underdrain pipeline that crosses the WTP
access road.
Subtask 570. Slope Repairs.
Slope repairs and/or modular retaining wall installation in steep slope areas above and
below the Washwater Basins.
Subtask 575. Washwater Treatment System Evaluation.
Evaluate treated washwater return system hydraulics to address limitations and recommend
improvements to increase flow capacity. Develop Detailed Design of modifications to
washwater treatment pump controls and telemetry to allow pumps to start and stop based on
levels in washwater basins.
Assumptions: Budget does not assume redesign of the washwater return system.
Subtask 580. Paving Improvements.
Design of paving improvements throughout the plant, including paving replacement and
slurry seal application.
SIA-Phase 11 FINAL 4
EXHIBIT A
i l City of San Luis Obispo B&V Project 132365
WTP Improvement Project November 2003
Task 730- Stenner Canyon Hydroelectric Conceptual Design Evaluations-
Phase II
The following tasks are added for refining and further developing the conceptual design
associated with the preferred alternative selected from the feasibility study for the Stenner
Canyon Hydroelectric Project:
Subtask 731. Assistance with PG&E Coordination/Negotiation
This task includes scheduling and attending project coordination meetings to be conducted
between the City and PG&E for the purpose of clarifying project alternatives and operation;
amending the City's power sales agreement; and confirming conceptual design
requirements associated with PG&E interconnection requirements and special facilities.
Assumptions: Three (3)meetings are assumed.
Deliverables: Draft Meeting Agenda(3 days before meeting).
Meeting Agenda-copies as required.
Meeting Minutes (within 1 week following meeting) — copies as
required.
Subtask 732. Additional Evaluations
This task includes updating and refining the Feasibility Study Technical Memorandum
estimates of hydroelectric facility flowrate, power generation estimates, energy revenue
estimates, power costs, and financial analyses based on any project concept changes
resulting from discussions between the City and PG&E under Subtask 731. This task also
includes additional research and computations to determine the structural and hydraulic
capacities of existing pipelines in the Salinas raw water system.
Assumptions: Prepare the additional evaluations for one (1)preferred alternative.
Deliverables: See Subtask 734.
Subtask 733. Develop Operational Strategy
This task is for developing a step-by-step procedure that defines integrated operation of the
Salinas raw water system, Stenner Canyon hydroelectric facility, and water treatment plant.
Operational protocols will be developed for the daily startup and shutdown routines, as well
as for planned and unplanned shutdowns of the hydroelectric facility. The objective is to
achieve seamless operation of all facilities and minimize the extent of PG&E power
purchases needed to operate the major WTP process equipment.
Assumptions: Prepare the operational strategy for one (1)preferred alternative.
Deliverables: See Subtask 734.
SIA-Phase U FINAL 5
EXHIBIT A
L City of San Luis Obispo B&V Project 132365
WTP Improvement Project November 2003
Subtask 734. Technical Memorandum
This task will document the work activities included under Task 730.
Deliverables: Draft TM submitted for City review (5 Copies).
Final TM with City comments incorporated(5 Copies).
Subtask 735. Meetings and Consultation
This task is allocated for miscellaneous meetings and technical consultation, including
design reviews with City staff. Sixteen (16) manhours are budgeted.
Task 800—Additional Project Components —Phase II
The following additional project components have been added to the scope of work:
Subtask 805. Plant-Wide Control System Evaluation
This task includes an evaluation of existing control systems, including software and
hardware, and meetings with plant staff to determine preferred control system
capabilities, operator interfaces, and system reporting capabilities. This task includes the
preparation of a letter report presenting findings and recommended improvements to the
plant-wide control system.
It is envisioned will be followed with an additional task involving the detailed design and
actual implementation of the recommended improvements by Consultant's
instrumentation and control technicians.
Deliverables: Draft Letter Report submitted for City review(5 Copies).
Final Letter Report with City comments incorporated (5 Copies).
Subtask 806. Plant-Wide Control System Design
Based on the approved recommendations in the Plant-Wide Control System Evaluation
letter report, construction documents will be prepared under the same detailed design
process as is outlined for Task 500. Input will be gathered from WTP operations staff to
establish design criteria and to assure staff needs and preferences are being incorporated
into project documents.
The key tasks involved in the Control System Replacement detailed design involve clear
specifications of technology the suits the City's needs and minimizes disruptions to the
plant operation. The detailed design documents will include specification of the
following:
• The existing Plant Control System utilizes Bristol Babcock 3330 RTUs that
last had a firmware upgrade 10 years ago. These RTUs are operating on
computer processors that are 10 years old. A specification will be written to
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EXHIBIT A
i City of San Luis Obispo B&V Project 132365
WTP Improvement Project November 2003
have the RTU's firmware upgraded so they are capable of communicating
with a new Human-Machine-Interface system.
• The existing Human-Machine-Interface Software is a DOS based program and
will be upgraded to an HMI program that runs in a Windows based operating
system, utilizes OPC data transfer, and has SQL reporting capability. It is
important to keep the existing Genesis Dos Based HMI software operational
during the replacement of the System.
• New Computers will be specified for the New HMI system.
• A new RTU will be designed into the existing plant control system such that is
allows monitoring and control of the transfer pumping station.
• A Control System Programming Description specification will be written.
This speciation will identify the graphic screens that must be recreated for the
new HMI system and identify the control interfaces to the existing RTU
program. For example, the specification will include-a picture of the existing
Filter Backwash Setpoint Control screen and identify the RTU signals that
must be programmed into the new HMI system. The existing system contains
81 graphic screens and approximately 1500 HMI data points.
• A specification will be created to delineate the start-up and testing procedures
required at each stage to insure minimal disruption to plant operations while
providing a tested system.
These detailed design documents will provide direction for the replacement of the HMI
program by the Consultant's instrumentation and control technicians during the
construction phase. These documents will also integrate the control system upgrade
project with work to be conducted by the contractor hired for the WTP Improvements.
Subtask 810. Other Plant Improvements
This task includes evaluation and design work related to several plant improvement
projects that are not fully defined. It is envisioned that Consultant will conduct
evaluation work for each project. Following development of detailed design scope,
Consultant will meet with City staff to confirm availability of adequate funding for
detailed design under this task budget. As currently defined, these projects include:
HVAC Improvements: Includes an evaluation and detailed design for addition of air
conditioning on the Ozone Building operating floor and heating and air conditioning in
the laboratory and office areas in the Filter Building. Budget excludes evaluation of Title
24 compliance requirements.
Ventilation Improvements: Includes an evaluation and detailed design for ventilation
improvements in the Chemical Building.
Plant-Wide Sampling System Improvements: Plant staff has indicated that specific
portions of the plant's sampling system do not function effectively, such as the clearwell
effluent sampling system. This task includes an evaluation of improvements to these areas
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"Will City of San Luis Obispo B&V Project 132365
WTP Improvement Project November 2003
of the plant sampling system. This task includes meeting with plant staff to determine
system deficiencies and development of recommended improvements.
Emergency Power System Modification: Includes an evaluation of modifications to the
emergency power system to allow additional plant loads to be fed from the emergency
generator in the event of a power failure. Additional capacity is expected to be available
following the feeding of plant water service from the Transfer Pump Station and
Reservoir No. 2.
Fluoride Feed System Improvements: Includes an evaluation and detailed design for
improvements to the fluoride feed system such as replacement of specific system
components. Budget.does not include a complete system redesign, such as would be
required with a change to hydrofluosilicic acid.
Subtask 815. Ballasted Flocculation Evaluation
This task includes additional evaluation of the potential addition of Ballasted Flocculation
(Actiflo) to the WTP. This evaluation will build upon the information presented in the
PDR and will include an analysis of potential reductions in ozone demand and other
water quality implications. The evaluation findings will be presented in a letter report
including a life cycle cost evaluation of capital costs, energy costs, chemical costs, and
other operations and maintenance expenses.
Deliverables: Draft Letter Report submitted for City review (5 Copies).
Final Letter Report with City comments incorporated(5 Copies).
Subtask 820. Ballasted Flocculation Pilot Study(Optional Task)
This task includes the implementation of a 5-week Actiflo pilot test and a 5-week test of
pilot filters. Budgeted costs include the following:
• equipment rental
• equipment transportation
• equipment start-up
• periodic observation of operation (3 one-day site visits assumed)
• coordination of equipment procurement, setup, operation, and breakdown
• preparation of a technical memorandum at the conclusion of the testing to
summarize findings and recommendations
Assumptions Budget assumes the City will be responsible for providing day-to-
day operations and maintenance of the pilot facilities and will be
responsible for installing and removing piping and power
interconnections required to operate the pilot facilities.
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WTP Improvement Project November 2003
COMPENSATION
Payment terms shall be as called for in the original contract. In addition to the
compensation stipulated in the original contract, the City will pay and the Consultant
shall receive compensation in a total sum not to exceed$519,686 for the services outlined
in this Amendment. Additional compensation not to exceed $53,029 may be authorized
by the City Utilities Director for work associated with Subtask 810. If the City elects, at
a later date, to proceed with Subtask 820, Ballasted Flocculation Pilot Study (Optional
Task), the Consultant shall receive additional compensation in a total sum not to exceed
$76,185.
SLO-Phase 11 FINAL 9