ADDENDUM 1 RFP FOR GOLF COURSE PUMP STATION R.pdf

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ADDENDUM 1:

REQUEST FOR PROPOSALS (RFP) FOR GOLF COURSE IRRIGATION PUMP

STATION

RFP is hereby amended as follows:

1. MODIFICATION TO PROPOSAL

a. REVISED: DEADLINE IS NOW WEDNESDAY, AUGUST 14, 2024 AT 2

PM

b. REVISED: RFP EXHIBIT “A” SCOPE OF WORK

2. It is the responsibility of each proposer to be aware of addenda under this RFP. Please sign and return this addendum with submitted proposal. You may call Audrey Gatliff, Purchasing Agent, at 478-445-4791 before proposals are due to confirm the number of addenda issued.

The above Addendum is hereby acknowledged:

(NAME OF PROPOSER)

(SIGNATURE) (TITLE)

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ADDENDEUM 1 (continued):

RFP EXHIBIT “A” SCOPE OF WORK

The pump station configuration that includes a 25 hp jockey and 2 x 50 hp main pumps Station Performance: 1200 GPM at 120 PSI Incoming Power: 480v 3ph 60hz Main Disconnect Size: 400 amp Wet Well Diameter: 60” ID Wet Well Depth: 11’0”

SCOPE:

Contractor shall provide the following services, equipment and new materials needed to complete the installation of the proposed new pump system:

• Provide factory trained technicians for the duration of the project

• Removal and replacement of the existing roof that will allow for the removal of the existing pump system and the installation of the new pump system

• Complete removal of the existing pump station and transport to a customer provided on site location for disposal.

• Provide main electrical work and new materials needed to connect the existing main disconnect to the new pump station control panel.

• Reuse existing pump building.

• Provide all equipment needed for removal of the existing pump system and new pump station installation

• Complete installation of the new pump station and associated equipment.

• Provide labor and materials if needed to make the new pump station discharge piping connection to the existing main line inside building.

• Complete start up, test and tune to ensure proper operation and performance

• Customer training on the pump station operation and required periodic maintenance

• A variable speed Vertical Turbine pump station including variable frequency drive speed control, vertical turbine pumps, piping, valves, electrical panel, base and all other features (where applicable as detailed below. A formed and reinforced base platform will support all manifolding, pumps, motors, and control panels to provide an integral unit ready to quickly install at the job site. Configuration of station inlet, discharge, power connections and layout/orientation of basic system components will be indicated on the sales drawing.

ELECTRICAL:

● The station ELECTRICAL CONTROL PANEL will be UL listed and meet or exceed UL508A specifications for safety of industrial control panels. Panel will be assembled and tested in a UL508A certified panel shop.

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● The station electrical control panel will meet or exceed Federal Communications Commission, (FCC) Part #15 Subpart B performance requirements for conducted and radiated emissions.

● A 3-pole 400 amp maximum FUSED UL Listed main disconnect switch with operating handle mounted in the main electrical panel door. The disconnect switch, mechanically interlocked to prevent access while the operating handle is in the ON position.

● A premium quality closed loop water to air HEAT EXCHANGER NEMA 4 cooling system will control temperature levels within the electrical enclosure protecting sensitive electronic components from overheating conditions.

● A lighted switch actuator will be provided for each pump and will illuminate GREEN whenever a pump is active.

CONTROLS:

Pump system will include an Industrial grade PLC custom program written specifically for this project. Control logic based on redundant design and interlocking of control devices for maximum safety and proper sequence of operation. In addition to diagnostic functionality available through the touchscreen display, the PLC controller shall also have diagnostic LEDs for monitoring status of discrete inputs and outputs. The PLC contains RS232 and RS485 communication ports, and/or ethernet ports for monitoring and programming purposes and an EEPROM, battery backed RAM and non-volatile memory for storage of critical configuration data. The PLC will have a highspeed counter, clock and calendar function with year, month, day, hour, minute, and day of week.

• Alarm conditions w/safety shut down, condition time stamp & automatic diagnostic system:

• Automatic re-pressurization after fault condition

• Low discharge pressure shutdown

• High discharge pressure shutdown

• Individual motor overload/phase loss

• VFD fault shutdown

• Low water level shutdown

● A solid-state pressure transducer provides a noise free, linear output proportional to discharge pressure. Transducer is solid-state, strain gauge type with integral voltage regulation and output accuracy not less than 0.25%. Transducer constructed of stainless steel and is rated for the pump station discharge pressure.

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● A 120-volt control transformer provides power to the pump station controls. The control transformer protected on primary and secondary sides with appropriately sized fuses. No load other than the pump controls will be supplied by the control transformer.

● Emergency Stop button on door front.

• An industrial grade LCD touchscreen user interface display provides access to:

Digital flow (GPM) and pressure (PSI) display, Both cumulative and resettable gallons pumped indicators, Pump ready/running status with elapsed run time display per pump, Flow-based pressure regulation to match discharge pressure with irrigation demand, Individual motor overload reporting, Minute by minute data logging saved to a removable flash RAM card, 32MB card to store approximately 12 months of data, Historic and real time X-Y plotting of pump station operation, Alarm log file, Ability to change system parameters such as setpoint pressure, time delay, Digital flow (GPM) and pressure (PSI) display

• Both cumulative and resettable gallons pumped indicators

• Pump ready/running status with elapsed run time display per pump

• Flow-based pressure regulation to match discharge pressure with irrigation demand

• Individual motor overload reporting

• Minute by minute data logging saved to a removable flash RAM card

• 32MB card to store approximately 12 months of data

• Historic & real time X-Y plotting of pump station operation

• Alarm log file

• Ability to change system parameters such as setpoint pressure, time delays

● An advanced microprocessor-based Power Phase Monitoring system installed to protect the pump system from equipment failure due to power faults occurring on the incoming electrical service to the pump station. The monitor actively monitors for phase loss, phase reversal, phase unbalance, under voltage and overvoltage conditions. If one or more of these conditions occur, the Phase Monitor signals the PLC logic controller to shut down the pump system preventing damage to pump system components.

● WETWELL level control system consist of a level transducer and a low-level safety shutdown float located in the WETWELL for accurate and reliable level control. The controls shall be fully integrated with the control system with programmable set points accessible through the station touchscreen display. An additional isolated 5A relay contact shall be provided for control of ONE external pond fill or other external fill source.

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● A 25HP variable frequency drive specifically designed for water pumping applications and include a graphical control interface keypad for jockey pump.

● A 50HP variable frequency drive specifically designed for water pumping applications and include a graphical control interface keypad for main pump.

● Quantity 2 x 50HP across line (XL) industrial grade dual interlocking contactor set for each main pump. The contactor allows the assigned pump to be run manually across the line or from the VFD output. It will also facilitate sequencing of pumps when more than one main pump is present.

PUMPS:

● Quantity (1) 25HP premium efficient (VHS) vertical hollow shaft motor, inverter duty rated, class F windings and internal 120V winding heaters for Jockey Pump.

● Quantity (1) 25HP 1800RPM Vertical Turbine pump assembly shall be provided. The pump assembly shall consist of one or more stages for each application in order to achieve maximum performance and efficiency. Impellers shall be investment cast 201SS, for higher tensile strength and hardness to prevent wear. The bowls shall be ductile iron to handle abrasive and corrosive water. The pumps shall have polymer bearings and are more abrasive resistant. All bolts and hardware shall be stainless steel

● Quantity 1 – 4” pump discharge head assembly.

● Quantity 1 – 4” diameter vertical turbine pump column fabricated from A53, Grade B schedule 40 CARBON STEEL, in inter-changeable sections not more than 10 feet in length.

Pump line shaft shall be AISI 416 SST.

● Quantity (2) 50HP premium efficient (VHS) vertical hollow shaft motor, inverter duty rated, class F windings and internal 120V winding heaters for Jockey Pump.

● Quantity (2) 50HP 1800RPM Vertical Turbine pump assembly shall be provided. The pump assembly shall consist of one or more stages designed for each application in order to achieve maximum performance and efficiency. Impellers shall be investment cast 201SS, for higher tensile strength and hardness to prevent wear. The bowls shall be ductile iron to handle abrasive and corrosive water. The pumps shall have polymer bearings and are more abrasive resistant. All bolts and hardware shall be stainless steel

● Quantity 2 – 6” pump discharge head assembly.

● Quantity 2 – 6” diameter vertical turbine pump column fabricated from A53, Grade B schedule 40 CARBON STEEL, in inter-changeable sections not more than 10 feet in length.

Pump line shaft shall be AISI 416 SST.

● All pumps shall be equipped with a silent wafer style non-slam check valve.

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● All pumps shall be equipped with a butterfly style isolation valve to allow for pump isolation during maintenance.

● Each turbine pump discharge head contains a mechanical seal assembly located where the line shaft protrudes through the discharge head. The mechanical seal assembly consists of a main housing, shaft sleeve assembly, locking and drive collars.

SKID, PIPING AND VALVES:

● The pump station skid and all components mounted on formed steel base. Formed steel base to be 3/8” thick ASTM A-26 hot rolled carbon steel plate. Structural steel shall be welded on the underside of the base to maximize structural rigidity. Base includes a hinged wet well hatch whenever possible.

● Custom fabricated pump discharge manifold designed and fabricated to maximize flow and efficiency. All fabricated piping conforms to ASTM specifications A53 for Grade B welded or seamless pipe. All welded flanges shall be forged steel slip‑on or weld neck type.

● Piping includes a discharge isolation valve, discharge pressure gauge, three 3/4" fertigation ports and a winterization drain port with 3/4" ball valve.

● A 3” pressure relief valve installed on the manifold piping sized to bypass sufficient water back to the water source to avoid the discharge pressure from exceeding the maximum programmed pressure set point.

● A 6 inch diameter electromagnetic flow meter shall be provided to measure water flow rate with an accuracy of +/- 2%. The flowmeter shall include an integrated LCD display and be constructed of epoxy coated ASTM carbon steel suitable for indoor or outdoor installation.

● A skid shim kit shall be provided to take up small gaps between skid and floor and to insure level installation of skid. Each kit shall include the following stainless-steel shims.

● The paint system consists of a multi‑step system including media blasting, application of a rust prohibitive epoxy prime coat followed by a two-part industrial grade ultraviolet resistant polyurethane finish

A detailed OPERATION and MAINTENANCE manual shall be provided detailing basic system operation, alarms, general maintenance procedures and use of the operator interface. The manual shall be in English and provided in electronic format on a thumb drive.

Full electrical schematics shall be supplied in a door pocket inside the control panel.

· Premium 200kA max impulse current rated surge protective device provided on the incoming power connections to the station Utilizing high-energy solid-state suppression circuitry to effectively protect electrical equipment from extreme electrical disturbances. An additional

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70kA max impulse current rated surge protective device installed on the secondary of the control transformer.

· A temperature sensor shall monitor the internal enclosure temperature. The temperature sensor system shall be fully integrated with the station PLC system. Temperature may be viewed through system touch screen display.

· An additional Input CHOICE card and TEMPERATURE SENSOR shall be provided for monitoring of ambient air temperature.

· CELLULAR remote pump system monitoring package shall be provided.

· A fertigation run relay shall be provided to activate a customer provided chemical injection pump. The relay output shall turn on when the station reaches a minimum flow set point and turn off when station flow drops below set point. The minimum flow set point shall be adjustable through the touchscreen display where provided.

· An arm mounted 5KW - 480V industrial forced air heater shall be provided. The unit shall include an integrated 40 - 120F temperature control thermostat. A separate disconnect and branch circuit protection shall be provided that will allow the heater power to be controlled independently of the station main electrical panel.

A 5 KVA power supply shall be provided for auxiliary customer loads. The power supply shall consist of a minimum 8 place NEMA 3R load center, resin filled power transformer, fused disconnect and convenience outlet mounted on a heavy-duty steel stand or station enclosure where applicable. The power supply shall produce a minimum of 40A/20A @120/240VAC with 460- 480VAC input voltage.

· Quantity (4) –(20) AMP - 1 Pole circuit breaker shall be provided. The breaker shall be of correct type for use with the unregulated supply load center.

· Pump Station Fasteners including Nuts, Bolts and Washers shall be made of STAINLESS STEEL. Fasteners for the following items shall be included where applicable: Submersible Pump Manifold, Discharge Heads, Pump Seals, Discharge Manifold, Discharge Flange and Butterfly Valves, Pressure Relief Valve, Electronic Butterfly Valves, Discharge Filter Connections, Discharge Filter Flush Manifold, WYE Strainer connections, Magnetic Flow Meter connections, Level Transducer to Base, Hatch plate hinges and hardware, Electrical panel to skid or floor, arm mounted electrical heaters and skid anchor bolts. This option DOES NOT include Grove Lock clamp hardware. Grove Lock hardware must be ordered separately.

· A FUSED (400) AMP service entrance rated UL98 Listed Heavy Duty Safety Disconnect shall be provided on the outside of the station enclosure for connection of the customer electrical service wiring to the station. The disconnect shall be rated NEMA 3R for outdoor installation.

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WET WELL SPECIFICATIONS

Pump station wet well restoration to be performed during the new pump station installation.

The following is the specifications and details for the proposed installation of one new 11’ deep x 63” Diameter SDR 32.5 HDPE pipe sleeve with fabricated bottom into the existing 72” corrugated wet well and also install a new 80’ long x 14” diameter SDR 17 HDPE intake flume pipe that will be mechanically joined to the new HDPE wet well using a fabricated stainless steel, flange adapter. Once the new wet well and intake are in place, the wet well will be encased in concrete to complete the installation. This entire wet well restoration project will be accomplished “wet” using an underwater construction diver to avoid dewatering the irrigation lake. This process is to ensure the entire wet well structure is brought to a “like new” condition to ensure overall integrity and eliminate the corroded metal contamination that could possibly affect the new pump system as well as the irrigation system. Contractor shall provide a 3 year warranty on materials, construction methods and installation labor for the well portion of the project.

Materials and procedures should include:

Provide and install 1ea. 63” x SDR 32.5 HDPE Wet well with fabricated bottom

Provide and install 1ea. 80’ of 18” SDR 17 HDPE intake pipe

Provide and install 1ea. Stainless steel intake pipe to wet well flange adapter

Provide and install 1ea. 36” Stainless steel intake box screen

Concrete and concrete pump to permanently set new wet well within the existing corroded wet well.

Provide all equipment and underwater construction divers needed to complete the job (Three person dive team minimum with underwater communication required to satisfy OSHA safety requirements)

Test pump station operation and document wet well water level draw down at pump station full load once the pump station is installed