HomeMy WebLinkAboutAddendum No. 3
West Hill Booster Pump Station Improvements Project ADDENDUM NO. 3
West Hill BPS-Addendum No. 3\ Page 1 of 8 March 1, 2023
West Hill Booster Pump Station Improvements Project
WTR-27-04184 – CAG-23-005
Addendum No. 3
Date of Addendum Issue: March 1, 2023
Due Date for Bids: Marcch 7, 2023
Notice to All Plan Holders and/or Prospective Bidders:
The following changes, additions, deletions and/or clarifications are hereby made a part of the project bid
documents for the above-named project and shall have the same effect as if set forth therein.
Bidders shall acknowledge the receipt of this Addendum No. 3 in the place provided in the Acknowledgement
of Receipt of Addenda. Failure to do so may result in your bid proposal being disqualified.
PLANS
1. DELETE Drawings M01, E02, E05, E06, E07, E08, E09 (Sheets 11, 16, 19, 20, 21, 22, 23) and REPLACE with
attached Revised Drawings M01, E02, E05, E06, E08, E09 (Sheets 11, 16, 19, 20, 21, 22, 23). Revisions
include: Modifications to the temporary pump system power supply and its operations and updating
motor control center to include an active harmonic filter instead of passive harmonic filters. The updated
filter reduced the physical dimensions of the motor control center.
TECHNICAL SPECIFICATIONS
2. REPLACE Section 1.11.00 Summary of Work of the technical specifications with the following:
1.11.00 Summary of Work
[CSI 01 11 00]
The West Hill Booster Pump Station Improvements consists of various mechanical, structural,
electrical, and site improvements at the existing Booster Pump Station:
• The mechanical improvements include the following but are not limited to, replacing the fire
flow diesel pump and existing domestic pumps, reuse of an existing domestic pump as an
additional pump, improving heating, ventilation, and air conditioning (HVAC), and installation
of related appurtenances.
• The structural improvements include the following but are not limited to, the installation of a
generator structure, retaining wall, visual and security fencing, and foundation pad.
West Hill Booster Pump Station Improvements Project ADDENDUM NO. 3
West Hill BPS-Addendum No. 3\ Page 2 of 8 March 1, 2023
• The electrical improvements include the following but not are limited to emergency generator
installation and its ancillary equipment, modifying and replacing the existing motor control
center, telemetry panel and other components as shown on the Plans. Additionally, a
temporary pump control panel electrical service and pump control panel will be required to
maintain pump station operation throughout construction.
• The site improvements include the following but not are limited to installation of a temporary
construction entrance, excavation, grading, backfill, restoration, construction of an asphalt
driveway, and landscaping.
3. REPLACE Section 1.51 Temporary Utilities of the technical specifications with the following:
1.51 Temporary Utilities
[CSI 01 51 00]
The Contractor shall provide and install all necessary water for construction-related fire protection and
utilities required by this contract, or by laws and regulations. Sanitary facilities adequate for all workers
shall comply with all codes and regulations.
At the close of this contract, the Contractor shall pay all utility bills that are outstanding, remove all
temporary electrical, sanitary, gas, telephone and water facilities, and any other temporary service
equipment that may remain. In addition, the Contractor shall arrange for the transfer of electrical and
water accounts to the Owner’s name.
The Contractor shall be responsible for an adequate temporary electrical system service, including
revenue metering, service disconnect, distribution equipment, pump control panel, interconnection
raceway and conductors and all grounding. This system shall be arranged by, and all costs paid by the
Contractor. The temporary electrical system service and control panel shall be sized as necessary to
provide continuous electrical service for uninterrupted operation of the City’s existing 60HP electrically
operated pump (480V three-phase), telemetry panel (120V single-phase), and existing aqua-mag
controller (120V single-phase). The City shall provide the telemetry panel to operate the Contractor-
provided Pump Control Panel. The Contractor shall provide and install all necessary interconnection
raceway and conductors. The Contractor shall design, provide, install and operate a temporary pump
control panel to operate the 60HP pump. The control panel shall include all required overcurrent
protection, grounding, labeling and motor control. The panel shall be Contractor-designed and utilize
a solid-state soft starter to operate the pump motor. Upon project startup the Contractor shall
uninstall and remove the temporary pump control panel electrical service, pump control panel and all
related equipment from the facility.
The Contractor shall make arrangements for and provide all necessary facilities for the necessary water
supply for construction at their own expense unless otherwise provided.
The cost related to temporary utilities described in this section shall be considered incidental and
included in the various bid items of this project. No additional compensation shall be made.
West Hill Booster Pump Station Improvements Project ADDENDUM NO. 3
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4. REPLACE Section 1.32.13 of the technical specifications with the following:
1.32.13 Scheduling of Work
[CSI 01 32 13]
Refer also to the Completion Time section under the Instructions (or Information) to Bidders.
The Proposal describes the times for Substantial Completion and Physical Completion.
This booster pump station is critical to the City’s operation of this portion of their water system. As
such, the proposed pumping improvements must be installed in phases and supported by a Contractor
provided temporary power supply. All costs related to the temporary power service shall be paid for
by the Contractor. Specifically, the Contractor is required to provide a temporary power service and
temporary pump control panel for the City’s existing 60HP pump (Bay No. 3 pump) and a 120VAC
power service for the City-provided telemetry panel and existing aqua-mag controller up to 24 hours
per day, 7 days per week for the duration of time the electrical and control system is being replaced.
The relocated and proposed pumps associated with Pump Bays No. 1 and 2 must be started up, tested,
and ready for commissioning before the pumps in Bays No. 3 and 4 (existing diesel driven pump and
60HP electric pump) are replaced. The existing diesel driven pump will be manually operated by the
City, as needed, to back up the 60HP existing pump (running on Contractor’s provided temporary
power system) which will run for the duration of the project while the proposed pumping
improvements in Bays No. 1 and 2 (including the supporting electrical and controls related work) are
constructed. One 8-hour shutdown of the booster pump station is permissible to facilitate the
installation of the isolation valves (and blind flanges if adjacent piping is not in place) for Pump Bay No.
1. The Contractor shall arrange the shutdown with the City’s Project Manager who will perform all
additional coordination with the City’s Operations and Maintenance shops. The City will allow for the
station to be isolated from the system on other occasions to support safe working conditions when
installing pumps or making piped connections. The City will be responsible for supplying fuel to the
existing diesel driven pump in the event that it needs to be operated due to a failure of the temporary
pumping and power supply system.
The Contractor provided temporary power supply shall include the following:
• All temporary cabling and conduits necessary for connecting the temporary electrical service
to the existing Pump no. 3 and telemetry panel and associated control equipment...
Contractor shall provide temporary service equipment, distribution equipment, metering
equipment and grounding to provide 480 VAC three-phase power to the motor starter and
120 VAC single-phase power to the telemetry panel and aqua-mag controller. Equipment
shall be inspected by electrical inspector prior to energization.
• Temporary Contractor designed electrical distribution equipment and pump control panel
capable of operating the existing Pump No. 3. Motor starter shall be a soft starter.
The City shall provide a temporary control panel in the pump station. The control panel will operate
the pump. The Contractor shall provide interconnection raceway and conductor between the control
panel and the Contractor-provided Pump Control Panel to facilitate operation. The Contractor shall
provide 120 VAC temporary power to operate the City-provided Control Panel and existing aqua mag
controller. Where the plans or specifications mention notification periods in hours or days, these time
periods are assumed to be working days unless specifically stated otherwise. For example, a
requirement of 48-hours notification for work desired to be performed at 1:00 pm Monday requires
notification be provided no later than 1:00 pm the preceding Thursday.
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5. REPLACE Section 9.99.34.01 of the technical specifications with the following:
9.99.34.01 – System 6: Booster Pump Station Structure (Internal/External)
[CSI 09 97 41]
Part 1 - General
This section applies to coating the existing booster pump station structure internal walls and ceiling
and external walls. No floors or roofs shall be coated as part of this project.
Part 2 - Products
Materials
Sherwin Williams
Internal:
1. First Coat: Pro Industrial Pre-Cat Epoxy K45-1150 Series (1.4 Mils DFT)
2. Second Coat: Pro Industrial Pre-Cat Epoxy K45-1150 Series (1.4 Mils DFT)
External:
1. First Coat: Loxon XP LX11-50 Series (6.5 – 8.4 Mils DFT)
2. Second Coat: Loxon XP LX11-50 Series (6.5 – 8.4 Mils DFT)
Owner and/or Engineer will provide Contractor with color selection concurrently with approved
coating system submittal.
Part 3 - Execution
Preparation
Internal – Clean the surface of all foreign material and dull the existing coating by hand abrading the
surface in accordance with the manufacturer recommendations.
External – Low pressure water cleaning at minimum 3,000 psi with a diluted solution of No Rinse
Prepaint Cleaner.
Dust, oil, water, and other contaminants shall be removed prior to applying coatings.
Installation
Coatings shall be installed in strict accordance with manufacturer requirements.
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6. REPLACE Section 11.11.13 of the technical specifications with the following:
11.11.13 Temporary Pumping System
Part 1 - General
Summary
The Contractor shall provide all labor, materials, and equipment necessary to provide temporary
electrical service to the site such that the City can operate their existing 60HP electric pump (Pump
Bay No. 3), City-provided telemetry panel, and existing aqua-mag controller while the facilities’ existing
electrical and control systems are being removed and replaced. See Div. 1 for additional information
regarding temporary electrical service requirements in support of the proposed improvements.
7. REPLACE Section 16.21 Electrical Service of the technical specifications with the following:
16.21 Electrical Service
[CSI 26 21 00]
Part 1 – General
Description of Work
Work consists of upgrading the existing electrical service to a 600-amp, 480-volt, 3-phase underground
service, pad-mounted transformer and service entrance equipment.
Scheduling Work with the Utility Company
The Contractor shall be fully and completely responsible for all scheduling and coordination with the
utility company. The Contractor shall coordinate and schedule power outages, power service for
operation and construction, and power service as may be required prior to Certification of Occupancy.
The Contractor shall make all necessary applications for service with the utility and shall notify the
Owner in writing of any obligations that the Owner must fulfill for service to be started, installed, or
modified.
Contractor/Utility Interface Responsibilities
The electrical utility providing service to these facilities is Puget Sound Energy.
During design, contact was made with Customer Service Representative, Dan Fogel, who can be
contacted by telephoning 253-234-6398. The division of responsibilities stated below has been
determined by coordination with the serving utility. The Contractor shall comply with all utility
company standards and requirements.
All utility charges for and related to the final permanent service to the facility will be paid by the
Contractor City of Renton, directly to the utility company and shall not be included in the Contractor’s
bid price.
Contractor shall notify the Owner of any changes to the responsibilities between the electrical utility
and the Contractor as outlined in these specifications prior to submitting a bid. Any change(s) in
responsibilities not brought to the attention of the Owner prior to bidding will not be cause for
additional payment.
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The Contractor shall notify the Owner (in writing) of any obligations or forms that the Owner is
responsible to provide for service.
8. REPLACE Section 16.41.1 Motor Control Center, Part 1 – General, Description of Work of the technical
specifications with the following:
16.41.1 Motor Control Center
[CSI 26 24 19]
Part 1 - General
Description of Work
The electrical contractor Control System Integrator shall furnish and install the motor control center
for installation by the electrical contractor including all related equipment as shown on the Plans and
specified herein. Refer to Division 17 for Control System Integrator responsibilities related to the
motor control center equipment.
9. REPLACE Section 16.45 Variable Frequency Drive, Part 2 – Products, Manufactured Units, Harmonic
Mitigation of the technical specifications with the following:
Harmonic Mitigation Techniques
1. The drive system shall be compliant with IEEE 519-2014 standards at the input VFD terminals based
upon the input power phase imbalance within 0.5 percent of nominal line voltage and under full
VFD output current ratings
2. Passive Harmonic Filter Requirements
a) VFDs shown with passive harmonic line filters shall be supplied with an input AC line harmonic
filter compensated reactor with minimum 5 percent impedance unless noted otherwise on the
one-line diagram. Line reactor shall be designed to address performance issues of NEMA MG1-
20.55 and to provide proper transient protection of the VFD input power devices. Harmonic
line filters shall be MTE Matrix Series AP Harmonic Filters or equal, with Capacitor Contactor
for disconnecting the filter capacitor bank when the drive is not running. Harmonic filtering
shall be provided by means of an active harmonic filter installed in the Motor Control Center.
Active harmonic filter shall be sized by Motor Control Center manufacturer to meet all IEEE
519 (current version) requirements. Harmonic Filter shall be TCI ALC200A00, 200A
(minimum), or equal.
10. REPLACE Section 16.63 Signal Cable, Part 2 – Products, Materials, Fiber Optic Cable of the technical
specifications with the following:
Fiber Optic Cable
1. Fiber optic cable shall be OS2 single-mode fiber optic cable with a minimum of 24 12 fibers. Cable
jacketing shall be black and OFNR riser rated for vertical-run and general use. Provide cable with
high grade PVC molded strain relief. Cables shall be listed and marked in accordance with the
requirements of the NEC. Cables shall be Corning FREEDM Loose Tube, Indoor/Outdoor, Gel-Free
West Hill Booster Pump Station Improvements Project ADDENDUM NO. 3
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cables, No Substitutions. Coordinate with City of Renton IT department on the types of connectors
required for terminating at existing and proposed fiber optic patch panels.
2. Fiber optic patch cable shall be a duplex single-mode fiber optic patch cable. Cable jacketing shall
be yellow. Provide cable with high grade PVC molded strain relief. Connectors shall match existing
connectors used by the City and shall be verified by the Contractor prior to submitting and ordering
cables.
11. REPLACE Section 16.71 Raceways, Part 3 – Installation, Raceway Applications of the technical
specifications with the following:
Part 3 - Installation
Raceway Applications
Galvanized Rigid Steel (GRS) conduit shall be used in all locations unless noted otherwise below or on
the Plans. All exposed and surface mounted conduit both on the interior and exterior of structures
shall be painted to match the color of the structure.
ABOVE GRADE CONDUITS (non-corrosive areas) shall be:
1. GRS for power and control wiring.
2. GRS for instrumentation and telecommunications wiring.
3. GRS for motor leads from VFDs.
4. EMT for above-grade lighting circuits.
5. GRS for above grade lighting circuits.
QUESTIONS/CLARIFICATIONS
12. The valves on the discharge side are coming out to be AWWA 250#, I need to know what existing flange
class is for connecting to the discharge 6” 90-degree elbow is as well as the discharge pump flange?
Answer: Based upon the pump as-builts included in Appendix D, the side of the pumps have 250#
flanges. The 6” 90-degree bend of the Proposed Mechanical Profile – Pump Bay No. 1 on Drawing M03 is
250# flanges.
13. What type (single-mode, multi-mode) and strand count of fiber would be needed between the existing
booster pump station and the City of Renton Municipal Airport Building?
Answer: Fiber optic cable shall be OS2 single-mode fiber optic cable with a minimum of 12 fibers.
14. Please confirm that conduit homeruns to the MCC from the pumps on sheet E05 will be run along ceiling
and come down in front of the window above the MMC and will need stabilization racks coming up from
the pumps?
Answer: Yes, the conduit homeruns to the MCC from the pumps on sheet E05 will be surface mounted
along the ceiling and come down in front of the window above the MCC. Stabilization will ne necessary as
required in the NEC to support the conduits from the pump to the ceiling.
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15. I’m seeking a clarification on a few items. System 6 in Division 9 of the project technical specifications
does not list what products to use to coat the interior and exterior of the Booster Pump Station
Structure. Also, I don’t see in the plans any indication of the height of the Booster Pump Station Building
or what the structure’s interior and exterior are made of?
Answer: The System 6 in Division 9 of the project technical specifications is updated and included in this
addendum for the clarification of the products to be used to coat the interior and exterior of the Booster
Pump Station Structure. The height of the Booster Pump Station Building is approx. 15 feet. The Booster
Pump Station structure’s interior and exterior are made of concrete.
ALL OTHER REQUIREMENTS OF THE CONTRACT PROVISIONS REMAIN IN EFFECT.
Ken Srilofung,
P.E., Project Manager, City of Renton