HomeMy WebLinkAbout10/19/2004, BUS 4 - WATER TREATMENT PLANT MASTER PLAN IMPROVEMENTS I
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CITY OF SAN LU I S O B I S P O
FROM: John Moss,Utilities Directo
Prepared By: Gary W. Hend rson, Water Division Manager
SUBJECT: 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 concept for negotiation and procurement of the Actiflo system with Kruger
Inc. and direct staff to proceed with negotiations.
3. Approve Amendment No. 3 to the contract with Black and Veatch for Phase 11 services
for the design of the recommended improvements at the Water Treatment Plant for an
additional amount not to exceed $455,996.
4. Approve the transfer of$167,967 from the construction budget to the design budget to
fund the work scope.
DISCUSSION
The City of San Luis Obispo has retained Black and Veatch Corporation for the evaluation and
design work necessary to implement recommendations of the Water System Master Plan for
improvements at the Water Treatment. Plant (WTP). Based on additional design efforts
associated with the Project, as discussed in detail later in the report, staff is requesting an
amendment to the design contract with Black and Veatch to provide the additional scope of
services.
On November 18, 2003, the City Council considered the recommendations in the Preliminary
Design Report for the Water Treatment Plant Master Plan Improvements. The Council approved
the recommended improvements at the plant to increase operational flexibility and enhance
treatment capabilities. A component of the approved scope of services with Black and Veatch
was an evaluation of a new sedimentation process called "Actiflo".
Actiflo Process
Actiflo is a high flow rate, compact clarification process that uses sand to enhance the settling
process. The sand allows the Actiflo process to produce high quality settled water in
significantly less time than the current conventional clarifier. In addition, the footprint of the
Actiflo process is typically 5 to 20 times smaller than a conventional clarifier.
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Water Treatment Plant Master Plan Improvements Page 2
The City currently has a limitation at our water treatment plant based on the current
sedimentation process. The capacity of the existing sedimentation basin is rated at 8.0 million
gallons per day (mgd) while the total plant capacity is 16 mgd. To achieve the total 16.0 mgd
capacity, water from Whale Rock by-passes the sedimentation process and goes directly to the
filters. This process is referred to as "direct filtration" and is only allowed for high quality water
with low turbidities such as the water we receive from Whale Rock.
On February 17, 2004, the City Council approved Amendment No. 2 to the contract with Black
and Veatch to conduct the pilot plant study of the Actiflo process at the WTP. Kruger, Inc.
provided the trailer mounted small scale pilot Actiflo system which was delivered in early March
of 2004. The pilot facilities were operated from March 10`}' through April 15`h, 2004. This
provided actual testing of the process utilizing the City's available raw water sources (Salinas,
Whale Rock, and a blend of the two sources).
Actiflo Pilot Test Results
The primary objective of the pilot test was to determine if Actiflo would be an acceptable
alternative to the existing conventional sedimentation/direct filtration treatment process. Based
on the results of the pilot plant study, the Actiflo process would be capable of providing reliable
pretreatment for the full 16.0 mgd plant capacity, with very low space requirements. This will
provide full conventional treatment for our current raw water sources as well as the future
Nacimiento water supply. Based on this analysis and the limited space available for construction
of a second conventional clarifier, staff would recommend that the Actiflo process be included in
the current design plans for the upgrades at the WTP.
Procurement of the Actiflo System
The Actiflo system is a proprietary system which is only available from Kruger, Inc. which now
owns the product rights. The Actiflo system will be designed specifically to meet our water
treatment plant site constraints. The system will be designed to be installed within the existing
flocculation basins (two separate basins). Since other site improvements (piping, electrical,
sludge handling, etc.) must be designed to meet the final design of the Actiflo system, a contract
for design and purchase of the Actiflo system needs to be done ahead of the project bidding. As
such, staff would recommend that the City, with the assistance of Black and Veatch, negotiate a
contract with Kruger for the design and purchase of the system concurrent with the other design
work to provide the detailed information to insure proper design of the other related facilities.
The City would then have the option of delivering .the Actiflo equipment to the construction
contractor as "City-famished" equipment, or alternatively, could assign the procurement contract
to the construction contractor at the time of award of that contract.
Additional Design Improvements
The current contract with Black and Veatch included additional work associated with items
identified under Task 810 of the detailed scope of work which included items B & C on the
following list. These items required additional evaluation to determine the design costs for
inclusion in the project. The Council had authorized the Utilities Director to approve additional
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Water Treatment Plant Master Pian Improvements Page
compensation for an amount not to exceed $53,029 for this work. These funds have not been
authorized and are available to partially fund the revised scope of work which includes the
following design components:
A. Actiflo system related components and negotiations/procurement of the system from
Kruger.
B. HVAC improvements for the Filter Building, Chemical Building, and the Ozone
Building.
C. Chlorine sampling system improvements.
D. Modify emergency power system to allow additional plant loads to be fed from the
emergency generator in the event of a power outage.
E. Replace fluoride feed system to provide more reliable and safe operation of the system.
F. Design replacement of wash water reclamation pumps, motors and valves.
G. Upgrade plant-wide control network including software,hardware, and cabling.
H. Nacimiento raw water pipeline and modifications to inlet control facilities for raw water
supplies.
Item H. above relative to the Nacimiento Project was included following Council's decision to
participate in the Nacimiento Project. The Nacimiento Project pipeline is planned to terminate at
Stenner Creek Road at the access road leading into the WTP. The current WTP Improvement
Project includes installation of pipelines within this section of access road and into the WTP site.
Following the pipeline installations, the roadway would be reconstructed and new paving
installed. Staff would recommend that the additional pipeline necessary to receive Nacimiento
water be installed at this time to reduce construction costs and eliminate future trenching of the
new roadway surface. This pipeline would be the City's responsibility to install even if done in
conjunction with the Nacimiento Project, as it is considered the City's service line.
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 Capital Improvement Project request for the Water Treatment Plant Master Plan
Implementation was revised as part of the Approved 2004-05 Budget, Page E-5 through E-8.
The financial plan request estimated an additional $235,000 for the additional design for the
project. In addition to the $235,000, there is the previous authorized encumbrance of $53,029
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Water Treatment Plant Master Plan Improvements Page 4
available to fund the amendment to the contract for a total of$288,029. The cost associated with
Amendment No. 3 to the contract with Black and Veatch for Phase II of the project is $455,996.
The additional funds ($167,967) necessary to support this amendment are available in the
construction phase budget which is included in the approved budget for fiscal year 2004/05. If
required, additional funding for construction will be requested following the design phase and
costs are more clearly defined.
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. Alternative projects and
treatment processes have been considered and technically rejected as part of this first
phase of construction.
ATTACHMENTS
1. Amendment No. 3 to Agreement for Consultant Services with Black and Veatch
AVAILABLE FOR REVIEW IN THE COUNCIL OFFICE
1. Water Treatment Plant Improvement Project,Draft Pilot Study Report, June 2004
Attachment 1
AMENDMENT 3 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 to as 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,Specification 90225;and
WHEREAS,on November 24,2003 the City entered into an Agreement with Consultant for preparation of
the final plans and specifications for the Water Treatment Improvement Project;and
WHEREAS,the City desires to amend the scope of services to include deign of additional improvements at
the Water Treatment Plant and Contractor 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. For providing the services as specified in Exhibit A to this Amendment #3, City will pay and
Consultant shall receive additional compensation of$455,996 for a total sum not to exceed$1,282,796.
2. 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:
Audrey Hooper,City Clerk David F.Romero,Mayor
APPROVED AS TO FORM: CONSULTANT
By:
J na . Lowell,City Attorney
EXHIBIT A
SAN LUIS OBISPO WTP IMPROVEMENT PROJECT
AMENDMENT 3 to AGREEMENT
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 to the contract signed on February 26, 2003, between the
City of San Luis Obispo and Black & Veatch Corporation. Consultant's obligations are
amended according to the following "Scope of Work" and "Schedule" 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
Add the following new tasks to the original scope of work.
Task 550 WTP Detailed Design—Actifloo System
Task 560 WTP Detailed Design — Nacimiento Water Project Interconnection
Pipeline
Task 810 WTP Detailed Design—Other Plant Improvements
Task 550 —WTP Detailed Design—Actifloo System
This task and list of deliverables described below are for design and preparation of
contract documents for the construction of the Actiflo® system at the existing WTP. This
work will be integrated with the contract documents being prepared for the WTP
improvements so that there will be a single construction contract for all of the plant work-
Summary
orkSummary of Project Requirements
The City's water treatment plant currently operates with all flow going through the
conventional sedimentation basin whenever possible for improved filter performance. To
achieve full capacity at 16 mgd, additional clarification capacity is needed. The site can not
easily accommodate another conventional-type clarifier, so other space-saving processes
have been studied. Ballasted flocculation, a.k.a. Actiflo®, by Kruger, was identified as the
most feasible and reliable clarification process for the City. One of the main benefits of the
Actifloo system is it can be installed within existing infrastructure on-site.
1 �� f
City of San Luis Obispo EXE TT A
WTP Improvement Project B&V Project 132365
Contract Amendment No. 3 October 5, 2004
The existing WTP has two flocculation trains, each with a capacity of 8 mgd. The
flocculation basins are each 66 feet long by 20 feet wide by 15 feet deep. An 8 mgd
Actiflo® train consisting of coagulation, flocculation, and settling tanks and a conservative
sedimentation basin loading rate of 20 gpm/sf would have overall dimensions of
approximately 48 feet long by 20 feet wide by 15 feet deep.
Based on the Actiflo® supplier's conceptual review, two 8 mgd Actiflo® trains could be
retrofitted into the existing flocculation basins to provide 16 mgd of total pretreatment
capacity without major structural modifications. For sludge handling, the existing clarifier
could be converted for use as a sludge thickener to concentrate the Actiflo® waste stream
prior to discharge to the existing sludge ponds, or an alternative means of handling sludge
could be investigated. Aside from various pipeline connections and electrical panel
installations,no construction would be required outside of the existing flocculation basins.
Phased construction of the Actiflo®system is feasible,requiring minimal,if any,shutdowns
of the plant. In this approach, the first 8 mgd Actiflo® train would be installed when the
water demand is below 8 mgd, and while the WTP operates using a single flocculation
train; the second Actiflo® train would be installed after the first new Actiflo® train is in
operation. Due to its high treatment flexibility, each Actiflo®train is expected to be able to
handle a maximum hydraulic flow up to 150%of design capacity(12 mgd per train), should
one Actiflo® train be out of service. There are significant benefits to implementing these
pretreatment improvements prior to the anticipated increases in water demands.
The following table snmmari�� preliminary conceptual design and operational parameters
for the proposed 16 mgd Actiflo® system, and the US Filter drawing (Attachment 1)
presents a preliminary layout of an Actiflo® system installed in the existing flocculation
basins.
Note that it will be necessary to have Kruger revise the conceptual design to conform to the
findings of the pilot study.
Scope of Work Amendment 3 2 '
City of San Luis Obispo EXHIBIT A
WTP Improvement Project B&V Project 132365
Contract Amendment No. 3 October 5, 2004
Table of Preliminary Conceptual Actiflo® Design Summary '
Parameter Value
Design Capacity
Total Design Capacity, mgd 16
No.of Trains 2
Nominal Capacity per Train, mgd 8
Maximum Hydraulic Capacity per Train, mgd 12
Coagulation Tank Design
Detention Time, minutes 2 Z
Tank Dimensions (L x W x Water Depth) 10.7' x.9.5' x 15'
Coagulation Mixer HP 5 HP
Injection Tank Design
Detention Time, minutes 2
Tank Dimensions (L x W x Water Depth) 10.7' x 9.5' x 15'
Injection Mixer HP 5
Maturation Tank Design
Detention Time, minutes 6
Tank Dimensions (L x W x Water Depth) 15.3' x 20' x 15'
AFD Maturation Mixer HP 7.5
Settling Tank Design
Surface Loading Rate,gpm/sf 20
Tank Dimensions (L x W x Water Depth) 20' x 20'x 15'
Sand Recirculation Circuit Design
No. of Hydrocyclone/Sand Pump Circuits per 1+1 standby
train
Sand Pump HP 10
Sludge Production Rate(on continuous basis), 140
gpm/train
Sand Loss
Estimated Loss per day, lbs per train (based on 100
16 mgd)
Prior to pilot study.
Z This value to be reviewed fiuther with Kruger.
Scope of Work Amendment 3 3 '�
City of San Luis Obispo EXHIBIT A
WIT Improvement Project B&V Project 132365
Contract Amendment No. 3 October 5,2004
Summary of Permit RMuirements
The City will be required to amend its existing operating permit with the Department of
Health Services (DHS). Consultant will assist the City by preparing a supplement to the
City's `operations plan" that the City will submit to DHS with its application for amended
operating permit.
Subtask Summary
The subtasks associated with this design effort are as follows:
Subtask Title
550.1 Actiflo®System Procurement&Procurement Administration
550.2 50%Design Submittal
550.3 50%Design Review Workshop
550.4 90%Design Submittal
550.5 90%Design Review Workshop
550.6 100%Design Submittal
550.7 Supplement to Operations Plan
550.8 Solids Handling System Design
550.9 Monthly Status Report and Project Invoices
550.1 Actiflo® System Procurement&Procurement Administration
Actiflo®System Procurement
This scope of work is based on City pre-purchase of the Actiflo system equipment. This
is recommended by Consultant because the Actiflo"Design Package"(the manufacturer's
equipment design and shop drawing information) is needed by Consultant in order to
complete the design and specifications for the equipment installation work to be
performed by the general contractor.
As pre-purchased equipment, the City then has the option of delivering the equipment to
the general contractor as "City-furnished equipment," or alternatively,the equipment pre-
purchase contract could later be assigned to the successful general contractor.
For the Actiflo®equipment procurement,the following subtasks are envisioned:
■ Revise Conceptual Design. It will be necessary for Kruger to revise the conceptual
design to conform to the findings of the pilot study. Consultant will recommend the
desired design revisions for review and concurrence by Kruger and the City.
Scope of Work Amendment 3 4 1
City of San Luis Obispo EDIT A
WTP Improvement Project B&V Project 132365
Contract Amendment No. 3 October 5,2004
• Negotiate Technical Specifications. Kruger maintains a set of standard technical
specifications for its equipment. Consultant will recommend proposed modifications
to the standard equipment specifications for City concurrence, and assist the City in
subsequent negotiations with Kruger.
■ Negotiate Commercial Terms and Conditions. Kruger maintains a set of standard
terms and conditions for the sale of its equipment. Consultant will recommend
proposed modifications to the standard terms and conditions for City concurrence,
and assist the City in subsequent negotiations with Kruger.
• Negotiate Contract Price and Schedule. Following the above, Consultant will assist
the City negotiate the contract price and schedule for pre-purchase of the Actiflo®
equipment.
Actiflo®System Procurement Administration
Consultant will assist the City with engineering services associated with administration of
the Actiflo® procurement contract. The City will act as the primary contact with Kruger
and will administer the procurement contract, including document control.
Consultant will assist the City with the following activities:
■ Submittal reviews;
• Respond to requests for information(BFI's);
■ Attending review meetings(as-needed;3 meetings budgeted);
• Review the engineering aspects of any change orders; and
• Issue design clarifications.
550.2 50% Design Submittal
Based on information and data contained in the Actiflo® Design Package to be famished
by Kruger,perform additional design evaluations, and then develop the design and details
associated with installation of the Actiflo® equipment system at the WTP. Develop the
related contract drawings and technical specifications to approximately the 50% level of
completion. Submit these to the City for review and comment. Refer to Attachment 2 for
the proposed drawing list.
For the 50% Design Submittal,the following steps are envisioned:
• Prepare design calculations and perform sizing of facilities.
Scope of Work Amendment 3 5 LJr'
City of San Luis Obispo EXHIBIT A
WTP Improvement Project B&V Project 132365
Contract Amendment No. 3 October 5,2004
• Actiflo® Installation Sequencing & Outage Planning Technical Memorandum (TM).
Prepare a technical memorandum documenting the sequencing of installation and
startup testing of the Actiflo®equipment, one 8 mgd train first, followed by the second
8 mgd train. It is tentatively planned that the first train will be installed in the direct
filtration train involving shutdowns of Ozone Basin 2 and Flocculation Basin 2. The
second train would then be installed in the conventional treatment train involving
shutdowns of Ozone Basin 1, Flocculation Basin 1 and the Clarifier. Based on the
selected sequencing scheme, the associated required piping and valves can be
determined.
■ Solids Handling Alteratives Evaluation. Identify and evaluate alternatives, and
assist with selection of the preferred scheme, for solids (sludge) handling relative to
the Actiflo system process. Prepare a technical memorandum documenting the
findings. Submit the TM for City review and concurrence.
Note Concerning Solids Handling Design: No modifications are planned to be made
to the existing sludge basins (ponds).
• Design Modifications for the Addition of Actiflo®. Prepare layouts, sections and
details, and technical specifications for: 1) facility and equipment demolition; 2) civil
site modifications and site piping modifications; 3) structural modifications to the
existing flocculation basins; 4) mechanical systems; 5) electrical systems; and 6)
instrumentation and control (I&C) systems. Approximate drawing production consists
of modifying six (6) existing drawings and preparing twenty (21) new drawings. It is
assumed that the new electrical equipment and control panels can be located inside the
adjacent control building. Consultant will assist the City to develop a suitable location
for storage of microsand, including review of alternatives and, if-needed, design of an
open-sided enclosure for weather-resistant storage.
Special Note Concerning the Instrumentation & Control Design: Special attention is to
be given to the integration of the Actio system into the existing RTP control system.
The budget estimate presented herein is based on Kruger furnishing and programming
its system using Bristol Babcock RTUs and Intellution HMI software. If Kruger
furnishes its standard equipment package, it will be necessary for Consultant to
perform the integration among different hardware&software packages during the field
programming task
• Flocculation Aid Polymer System Design. Prepare layouts, sections and details, and
technical specifications for the selected flocculation aid polymer system; three(3)new
drawings are estimated.
Scope of Work Amendment 3 6 � I
City of San Luis Obispo EXHIBIT A
WTP Improvement Project B&V Project 132365
Contract Amendment No. 3 October 5,2004
• Updated Opinion of Probable Construction Cost and Construction Schedule. Prepare
revisions to the opinion of probable construction cost and the construction schedule.
Deliverables: Actiflo®Installation Sequencing&Outage Planning TM (3 copies)
Solids Handling Alternatives Evaluation TM(3 copies)
Actiflo®50%Drawing Set(3 copies)
Related Actiflo®Technical Specifications(3 copies)
Updated Opinion of Probable Construction Cost(3 copies)
Updated Construction Schedule(3 copies)
550.3 50% Design Review Workshop
Conduct a 50%design review workshop to receive and discuss City comments. .
550.4 90% Design Submittal
Develop drawings and specifications to approximately the 90% level of completion. All
drawings and specifications will be "engineering complete" and will reflect in-house
quality control comments. At this level of completion, the Actiflo® process design
drawings and specifications will have been combined with the remainder of the WTP
improvement design work.
Deliverables: 90%Drawing Set(5 copies).
Technical Specifications (5 copies).
5505 90% Design Review Workshop
Conduct a 90%design review workshop to receive and discuss City comments.
550.6 100% Design Submittal
Incorporate City comments into the drawings and specifications, and provide a final
camera-ready submittal.
Deliverables: Final Construction Drawings (Vellum full-size drawings, 1 copy).
Technical Specifications; camera-ready.
550.7 Supplement to Operations Plan
The City will be required to amend its existing operating permit with the Department of
Health Services (DHS). Consultant will assist the City by preparing a supplement to the
City's "operations plan" that the City will submit to DHS with its application for amended
permit. The plan will be submitted as a draft, and then finalized by incorporating City
comments.
Scope of Work Amendment 3 7 � ...
City of San Luis Obispo EXHIBIT A
WT?Improvement Project B&V Project 132365
Contract Amendment No. 3 October 5, 2004
Deliverables: Supplement to Operations Plan(Draft, 3 copies)
Supplement to Operations Plan(Final,3 copies)
550.8 Solids Handling System Design
Consultant shall provide the design and contract documents for the additional solids
handling system. Prepare layouts, sections and details, and technical specifications for
the selected solids handling system; five (5) new drawings are estimated. Integrate these
drawings with the remainder of the drawing set.
550.9 Monthly Status Report and Project Invoices
Consultant shall provide monthly status report and project invoices through advertisement
for bidding.
Scope of Work Amendment 3 g Lr" 3
City of San Luis Obispo EX Mrr A
WTP Improvement Project B&V Project 132365
Contract Amendment No. 3 October 5, 2004
Attachment 1
Conceptual Layout of Actiflo at WTP
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Scope of Work Amendment 3 9
City of San Luis Obispo EXHIBIT A
WT?Improvement Project B&V Project 132365
Contract Amendment No. 3 October 5,2004
Attachment 2
Proposed Drawing List=Task 550 Actiflo® System Addition
Action:
A-Add New Drawing,M—Modify WT?Design Drawing
Dwg# Title Action
Fxisling Drawings from 07F Improvements Project(6)
G-003 General Process Flow Diagram M
G-004 General Hydraulic Profile M
G-005 Overall Site Plan M
EG-001 Electrical Power Distribution One-Line M
EG-002 Electrical Site Plan M
I-006 Control System Block Diagram M
New Drawings for Ac i,/lo System Addition(21)
Flocculation Basin—Demolition Plan A
Flocculation Basin—Demolition Sections&Details A
Mechanical Lower Floor Piping Plan A
Mechanical Operating Floor Piping Plan A
Mechanical Sections A
Mechanical Details A
Structural Lower Floor Plan A
Structural Operating Floor Plan A
Structural Sections 1 A
Structural Sections 2 A
Structural Details 1 A
Electrical One-Line Diagram A
Electrical Schematics 1 A
Electrical Schematics 2 A
Electrical Layout Lower Floor Plan A
Electrical Layout Operating Floor A
Electrical Details 1 A
Instrumentation P&ID Sheet 1 A
Instrumentation P&ID Sheet 2 A
Instrumentation Details A
Sand Storage Enclosure A
Scope of Work An=dment 3 10 �
City of San Luis Obispo EXHIBIT A
WTP Improvement Project B&V Project 132365,
Contract Amendment No. 3 October 5,2004
New Drawings for Chemical Feed System Addition(3)
Flocculation Aid Polymer System Layout and Details A
Electrical Drawing A
Instrumentation-MID Flocculation Aid Polymer System A
New Drawings for Solids Handling System(5 Assumed)
Titles TBD/Integrate with remainder of drawing set A
Scope of Work Amendment 3 11 ��
City of San Luis Obispo EXHIBIT A
WTP Improvement Project B&V Project 132365
Contract Amendment No. 3 October 5,2004
Task 560 - WTP Detailed Design — Nacimiento Water Project
Interconnection Pipeline
Summary of Project Requirements
In the near future, the City's water treatment plant will receive an additional (third) water
supply from the County's Nacimiento Water Project (NWP). The NWP pipeline is
expected to be installed in Stenner Creek Road, immediately outside of the City's property
line.
This task is for the design and preparation of contract documents for a new pipeline located
on the City's property that will interconnect the NWP pipeline with the WTP influent box.
As a part of this, the three water supply pipelines (Whale Rock, Salinas and NWP)will be
interconnected in the vicinity of the influent box such that either supply can be used
individually or blended prior to entering the ozone contact basins.
This work will be integrated with the contract documents being prepared for the WTP
improvements so that there will be a single construction contract for all of the plant work.
Task 560- Scoue of Work
For the NWP Interconnection Pipeline,the following subtasks are envisioned:
• Perform Routing Study & Alternatives Evaluation. Identify and evaluate alternative
alignments for the interconnection pipeline. Identify and evaluate alternatives for the
piping and valving modifications at the influent box to accomplish separation or
blending of supplies. Prepare a TM to document the evaluations. Meet with the City
to discuss the TM and select the preferred alternative.
• Based on the preferred alternative, prepare the design, contract drawings and
specifications necessary to integrate this part of the project with the rest of the project.
Three (3) contract drawings are estimated (pipeline profile - 1 drawing; influent box
revisions - 2 drawings). Submit these drawings with the 50% Design Submittal
described for Task 550. Afterwards, prepare 90% and 100% Design Submittals as
described for the remainder of the project.
Scope of Work Amendment 3 12
City of San Luis Obispo EDIT A
WT?Improvement Project B&V Project 132365
Contract Amendment No. 3 October 5, 2004
Task 810 - WTP Detailed Design — Other Plant Improvements
Summary of Project Requirements
This task is for the design and preparation of contract documents for other plant
improvements. This work will be integrated with the contract documents being prepared
for the WTP improvements so that there will be a single construction contract for all of the
plant work.
Task 810-Scope of Work
For the other plant improvements, the following subtasks are included:
810.1 HVAC Improvements-Ozone Building
Evaluate options to reduce heat levels in the Ozone Power Supply Unit Cabinets. Design
cooling system and prepare drawings and specifications including power feed and
controls. Confirm capacity of existing ventilation system to meet increased heat loads. A
packaged cooling unit (e.g., by Hoffman) to cool the units' interior and discharge heat to
the room is envisioned.
810.2 HVAC Filter Building
Review options to provide HVAC for laboratory, offices and locker rooms in the Filter
Building. Design HVAC unit and ductwork. Prepare drawings and specifications
including roof plan, reflected ceiling plan, structural (for roof penetration), power feed
and controls.
A (f5 ton) rooftop HVAC unit mounted over the hallway between the lab and office is
planned,with ductwork penetrating the roof to below the ceiling area and then routed into
the lab and office over doorways/partitions. Return air cutouts can be cut above the
door/partitions to send return air via the ceiling plenum back to the rooftop unit. A new
heater is installed in the locker room.
810.3 HVAC Chemical Building
Review ventilation issues in the Chemical Building and design a system to improve
ventilation and reduce the impact of chemical fumes. Design ventilation system. Prepare
drawings and specifications including a roof plan, louver design, structural (for roof
penetration),power feed and controls.
It is planned to install a rooftop ventilation unit on one end of the building and draw fresh
air through a new louver to be installed in the existing window location. No hazardous
classifications are believed to apply.
Scope of Work Amendment 3 13
City of San Luis Obispo EXHIBIT A
WTP Improvement Project B&V Project 132365
Contract Amendment No. 3 October 5, 2004
810.4 Chlorine Sampling Evaluation
Relocate the existing chlorine analyzers to the Transfer Pump Station and Plant Water
Service Pump Station. New sample pumps will be installed.
The performance of the existing analyzers is unsatisfactory and they require high levels of
maintenance; in addition, there is not adequate flow to the analyzer and to the lab. The
sample pump will be upsized. The City desires a continuous lab sample as well.
8105 Emergency Power
Evaluate 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 the plant water service from the
Transfer Pump Station and Reservoir No. 2. Submit memorandum outlining the
approach including order of magnitude costs. Develop drawings and specifications,
including single line diagrams, evaluation of swapping existing transfer switches, and
interlocking diagrams between transfer switches and loads.
810.6 Fluoride Feed System
Evaluate approaches to improving existing the fluoride feed system such as a gravity
hopper system, replacement pumps, and siphon breakers. Review availability of space
and operational requirements. Prepare drawings and specifications for the installation of
system improvements, including floor plans, piping plans, power, controls, structural (for
floor penetrations) and phasing of work to minimize plant shutdown.
810.7 Ozone Diffusers
Evaluate options for replacing deteriorating gaskets in the ozone diffusers. Research
alternative gasket materials and pricing. Prepare drawings and specifications to allow the
construction contractor to purchase and install new gaskets.
810.8 Wash Water Reclaim Pumps
Design replacement of wash water reclamation pumps, motors and valves. Finalize
operational criteria and develop drawings and specifications, including mechanical,
electrical and controls. City may flush wash water return line prior to finalizing the pump
sizing to determine the hydraulic capacity of the system.
810.9 Control Network Upgrade
Evaluate options for upgrading the plant-wide control network such as installing fiber
optic or CAT-5 cable. Develop drawings and specifications for upgrade throughout the
WTP, including replacement of conduits where required.
Scope of Work Amendment 3 14
City of San Luis Obispo EXHIIBIT A
WTP Improvement Project B&V Project 132365
Contract Amendment No. 3 October 5, 2004
810.10 Filter Media Addition
Prepare a specification for installation of additional anthracite media based on filter beds
measurements taken by plant staff.
Scope of Work Amendment 3 15 t 1�
City of San Luis Obispo EXHIBIT A
WTP Improvement Project B&V Project 132365
Contract Amendment No. 3 October 5,2004
810.10 Filter Media Addition
Prepare a specification for installation of additional anthracite media based on filter beds
measurements taken by plant staff.
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$459,194 for the services outlined
in this Amendment.
Original Change in Revised
Contract Contract Contract
Task Description Amount Amount Amount
550 WTP Detailed Design— $0 $320,855 $320,855
Actifle System
560 WTP Detailed Design— $0 $21,222 $21,222
Nacimiento Water Project
Interconnection Pipeline
810 WTP Detailed Design—Other $0 $113,919 $1.13,919
Plant Improvements
TOTAL - - $4559996
Scope of Work Amendment 3 15 �^