DISINFECTION SYSTEM MPROVEMENTS CITY OF ABERDEEN, …

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DISINFECTION SYSTEM MPROVEMENTS CITY OF ABERDEEN, SOUTH DAKOTA

2021

CONTRACTOR’S BID DATE: Tuesday, June 15, 2021, 2:00 P.M.

PLACE TO FILE FOR CONTRACTOR’S BIDS: Office of City Engineer

123 S. Lincoln Street Aberdeen, SD 57401

ADDENDUM NO. 1 June 4, 2021

TO ALL PLANHOLDERS:

The following changes, clarifications, additions, and/or deletions are hereby made a part of the contract documents for the above-referenced project, as fully and completely as if the same were fully set forth therein. This addendum takes precedence over any items that may conflict. SPECIFICATIONS

1. Refer to Specification 22 3000 – Plumbing Equipment:

Add the following to paragraph 2.01.A: “6. Goulds Water Technology / Xylem.”

2. Refer to Specification 23 3700 – Air Outlets and Inlets:

Add the attached specification in its entirety.

3. Refer to Specification 46 0076 – On-Site Sodium Hypochlorite Generation System:

Replace the specification in its entirety with the attached specification.

4. Refer to Specification 46 3383 – Liquid Chemical Equipment:

Replace the specification in its entirety with the attached specification.

PLANS 5. Refer to Sheet P101 – 1st Level Process Plan:

Add Note 2 to Pump Schedule:

“2. Pump power listed is a maximum design horsepower. It is acceptable if the design condition can be met with a lower horsepower.“

6. Refer to Sheet M102 – 2nd Level Mechanical Plan:

Fan Schedule: Delete “2 STAGE” from note #2 below the schedule.

7. Refer to Sheet E102 – 2nd Level Electrical Plan:

Change the two duplex GFCI receptacles for sodium hypochlorite pumps PMP-2038 and PMP-2039 to NEMA 6-20R receptacles.

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8. Refer to Sheet E500 – Electrical Details:

Revise Detail 2 per the attached updated drawing.

9. Refer to Sheet E601 – Electrical Schedules:

Change the two 20/1 breakers for sodium hypochlorite pumps PMP-2038 and PMP-2039 to 20/2 GFCI breakers.

All bidders shall acknowledge receipt and acceptance of ADDENDUM NO. 1 by signing the space provided on the Bid Form.

I hereby certify that this engineering document was prepared by me or under my direct personal supervision and that I am a duly registered Professional Engineer under the laws of the State of South Dakota.

Date: 06-04-2021

MARK A. HARDIE, P.E.

License No. 6819

My renewal date is June 30, 2021

Pages or sheets covered by this seal:

Entire Document

HR Green, Inc. Project No. 200203

Disinfection System Improvements

Aberdeen, South Dakota

AIR OUTLETS AND INLETS 23 3700 - 1

SECTION 23 3700 AIR OUTLETS AND INLETS

PART 1 GENERAL

1.01 SECTION INCLUDES

A. Louvers:

1.02 SUBMITTALS

A. See Section 01 3000 - ADMINISTRATIVE REQUIREMENTS for submittal procedures.

B. Product Data: Provide data for equipment required for this project. Review outlets and inlets as to size, finish, and type of mounting prior to submission. Submit schedule of outlets and inlets showing type, size, location, application, and noise level.

1.03 QUALITY ASSURANCE

A. Test and rate louver performance in accordance with AMCA 500-L.

B. Manufacturer Qualifications: Company specializing in manufacturing the type of products specified in this section, with minimum three years of documented experience.

PART 2 PRODUCTS

2.01 MANUFACTURERS

A. Arrow United

B. Carnes

C. Greenheck

D. Metalaire, a brand of Metal Industries Inc

E. Louvers and Dampers

F. Pottorff

G. Ruskin

H. United Enertech

I. Substitutions: See Section 01 6000 - Product Requirements.

2.02 LOUVERS

A. Type: 4 inch deep frame with blades on 45 degree slope with center baffle and return bend, heavy channel frame, 1/2 inch square mesh screen over intake or exhaust end.

B. Fabrication: 16 gauge, 0.0598 inch (1.52 mm) thick galvanized steel thick galvanized steel welded assembly, with factory prime coat finish.

C. Color: To be selected by Architect from manufacturer's standard range.

PART 3 EXECUTION

3.01 INSTALLATION

A. Install in accordance with manufacturer's instructions.

B. Check location of outlets and inlets and make necessary adjustments in position to comply with architectural features, symmetry, and lighting arrangement.

END OF SECTION

Addendum #1




ON-SITE SODIUM HYPOCHLORITE GENERATION SYSTEM 46 0076 - 1

SECTION 46 0076 ON-SITE SODIUM HYPOCHLORITE GENERATION SYSTEM

PART 1 GENERAL

1.01 DESCRIPTION

A. Scope

1. This Section covers the work necessary by the Contractor, On-site Sodium Hypochlorite Generation System (OSHGS) Supplier to furnish, install, test, and make ready for operation an On-site Sodium Hypochlorite Generation System.

2. The Generation System includes, but is not limited to the Sodium Hypochlorite Generator Skids with integral piping, valves, main system control cabinet with PLC, Water Softener, bulk salt/brine tank, hypochlorite solution storage tanks, piping, valves, ancillary equipment as specified herein, related testing, start-up and training services.

3. The OSHGS Supplier shall furnish an entire OSHGS consisting of the following major components:

a. Sodium Hypochlorite Generation cells.

b. Control cabinet, PLC, VFD’s, networking communication components, and associated equipment.

c. Hydrogen Dilution System.

d. Water Softeners & Cartridge Filters.

e. In-line Water Heater.

f. Brine Tank and accessories.

g. Sodium hypochlorite storage tanks and accessories.

h. Sodium hypochlorite dilution panel

i. Acid cleaning Cart/System.

j. Spare parts.

B. System Description

1. Each On-site Sodium Hypochlorite Generation System (OSHG) shall consist of skid-mounted sodium hypochlorite generation cells, solenoid control valves, a transformer rectifier, brine tank, sodium hypochlorite storage tank, feed pump, and hydrogen dilution system. The OSHGS shall generate an aqueous solution of a minimum concentration of 0.8 percent (±0.05%) by weight sodium hypochlorite expressed as chlorine from inputs of salt, water, and electricity. The minimum capacity shall be demonstrated to be equal to the capacity specified for each installation while not exceeding the maximum aggregate raw material quantities specified below.

2. Scope of supply shall also include water softener, water heater, and acid cleaning system.

3. The system shall be designed for the following operating conditions:

a. Unit ID: GEN-2021.

1) Generation Capacity: 300 pounds per day free available chlorine.

b. Unit ID: GEN-2022.

1) Generation Capacity: 300 pounds per day free available chlorine.

4. The electrolytic cell shall consume 2.5-3.5 pounds of salt per pound of chlorine equivalent output, using solar salt containing no additives (organic binders, flow control agents, resin cleaning material, etc.), and meeting the following specifications:

a. Sodium Chloride (dry basis) – 96% minimum.

b. Insolubles – 0.15% maximum.

c. Surface Moisture – 0.20% maximum.

5. The electrolytic cell shall consume 1.8-2.4 AC kilowatt-hours of electricity per pound of chlorine equivalent output.

6. Expected water consumption shall be in the range of 14.0-17.0 gallons per pound of chlorine equivalent output.





a. Supplier shall provide water heater to adjust water temperature. Water temperature must measure between 55 °F and 78 °F at a minimum of 50 psi water pressure at the water softener inlet.

7. Generator performance is to be measured as a function of total consumption for salt and power. Expected ranges of consumption for salt shall be 2.5-3.5 pounds of salt and 1.8-2.4 KWH per pound of equivalent chlorine (PE). Product concentrations shall be in the range of 0.80% ± 0.05%.

a. Performance shall be measured as the sum of the unit measurements for salt (per pound equivalent) and power (KWH per pound equivalent) and shall not exceed 6.0 consumable units. Example: salt consumption at 3.0 pounds per pound equivalent and 2.0 KWH per pound equivalent will measure 5.0 consumable units and will be considered proper performance.

b. Water softener salt consumption and or chiller or heater power consumption shall be excluded from performance calculations.

8. The only liquid waste product allowed from the OSHGS shall be the periodic backwash discharge from the water softener.

1.02 RELATED SECTIONS

A. All electrical, mechanical, metal, painting and instrumentation work included herein shall conform to the applicable Sections or Divisions of this project except as otherwise shown or specified.

1.03 QUALITY ASSURANCE

A. OSHG System Supplier Requirements:

1. All equipment provided under this section shall be obtained from a single manufacturer, who shall:

a. Assume full responsibility for the completeness and proper operation of the OSHG.

b. Have experience, be reputable, and be qualified in designing and manufacturing on-site hypochlorite generation equipment.

c. Have current NSF Standard 61 Certification for the generation skid being offered.

d. Have at least 15 years' experience with on-site sodium hypochlorite generation equipment ranging in capacity from 50 to 2000 pounds per day of 100% chlorine equivalent.

e. Supply units containing all necessary appurtenances and components for a complete and operating system conforming to this specification. The OSHG System shall be pre-assembled, piped, and factory-tested to assure compliance with all operational requirements. The OSHG System shall be shipped as a single unit. Loose hypochlorite generation components shall not be acceptable. No field assembly or wiring shall be permitted with the exception of external conduits. Equipment footprint as shown on the drawings shall not be exceeded.

f. Have at least ten similar OSHG Systems in operation for at least five years.

g. Supplier shall have manufacturer's representative within 300 miles of project site.

2. To ensure quality and complete unit responsibility, the OSHG must be assembled and inspected by the OSHGS Supplier at its facility. The complete OSHG must be a standard and regularly-marketed product of that manufacturer. The OSHG Supplier must have a physical plant, technical and design staff, and fabricating personnel to complete the work specified.

3. The Owner reserves the right to be present at the fabricator’s facility for visual inspection of equipment to be supplied.

B. Specified Manufacturer

1. Microclor as manufactured and supplied by PSI Water Technologies, Inc.

2. ChlorTec as manufacturered and supplied by DeNora Water Technologies, Inc.

3. Engineer approved equal.

C. Warranty





1. OSHGS supplier shall inspect the installation after completion and confirm that the OSHGS’s supplied equipment and installation is free from faults and defects and is in conformance with the OSHGS Supplier’s approved submittal drawings and documents.

2. Prior to acceptance of the Sodium hypochlorite generator system, provide written warranty from the OSHGS Supplier to confirm the following:

a. OSHGS Supplier has inspected the installation and confirms it is in conformance with supplier's drawings and documents.

b. The warranty period shall start from the date of substantial completion of the system.

c. All equipment supplied shall be warrantied to remain free of defects for a period of two(2) years from the date of substantial completion.

d. The electrolytic cells including cell body shall have a two (2) year full replacement warranty and a prorated straight-line replacement warranty for years 3-7 from the date of substantial completion.

D. Pre-Approval Submittals

1. Each supplier submitting an alternate to the equipment defined herein shall provide the following submittals 10 days prior to the established bid date. The following information is required:

a. A complete set of drawings.

b. A reference list of no less than then ten installations of the type and size of system proposed, with installations in service for a minimum of five years. The list shall include location, owner contact information, installation date, and design conditions. Failure to submit references for similar systems may deem the pre-approval request “non-responsive” and will be rejected without further review.

c. All exceptions and/or deviations shall be fully described in the appropriate section. Each deviation must reference the listed specification and explain in full detail how the proposed system is different.

E. Product Submittals

1. The following product data shall be submitted by the OSHGS Supplier for review and approval by the Engineer that the product provided conforms to the site-specific requirements prior to the fabrication of the systems:

a. Process and instrumentation diagram for the systems.

b. Shop drawings and catalog literature showing dimensional information and details of piping, fabrication, and erection of all materials and equipment furnished under this section, including:

1) Detailed drawings of tank nozzle orientations provided.

2) Detailed drawings of equipment installations provided.

c. Scaled drawing of general layout, general arrangements, and major system components, including:

1) Dimensions, including those for system connections

d. Drawings showing fabrication, assembly, installation, and wiring diagram. Wiring diagrams for the electrical control panel and rectifier transformer shall consist of, at a minimum, control schematics, including coordination with other electrical devices operating in conjunction with the OSHGS.

e. Manufacturer’s literature, illustrations including weight and dimensions, specifications, materials of construction, and bill of materials for each component of the system. Data shall include a complete description in sufficient detail to permit comparison with the technical Specifications. Major system components include:

1) Water softener.

2) Brine pump.

3) Hydrogen dilution blower.

4) Miscellaneous instrumentation, valves, and accessories.

f. Performance data: for each pump and blower furnish a performance certification indicating:





1) Pressure.

2) Capacity.

3) Efficiency.

4) Horsepower.

g. Motor data: for each motor furnish a certified motor data sheet for the actual motor or for a previously manufactured electrically duplicate motor which was tested.

h. Control philosophy including I/O list and loop descriptions.

i. The acceptable range of water pressure for proper system operation. If a pressure or flow regulator is required, it shall be provided.

j. A list of all parameters, ratings or other characteristics where the proposed Sodium hypochlorite generator system deviates from the requirements set forth in these Specifications.

k. Installation instructions.

l. Performance testing protocol including a recommended test plan, measurement methods, and sample data sheet showing all pertinent process data to be recorded and the frequency and data readings.

m. Current NSF Standard 61 Certification for the generation skid being offered.

n. References for at least ten similar units that have been installed and have been operational for at least five years of continuous service.

o. Affidavits of compliance with referenced standards and codes.

F. Operation and Maintenance Manuals

1. Detailed operation and maintenance (O&M) manuals shall be provided by the Supplier to the Engineer for review and approval. At a minimum, the following shall be included:

a. Required Operation Data.

1) Complete, detailed operating instructions for each piece of equipment.

2) Explanations for all safety considerations relating to operations.

3) Recommended spare parts lists.

b. Required Maintenance Data.

1) All information and instructions required by plant personnel to keep equipment properly cleaned, lubricated, and adjusted so that it functions economically throughout its full design life.

2) Maintenance summary forms.

3) Explanation with illustrations as necessary for each maintenance task

4) Recommended schedule of maintenance tasks.

5) Lubrication charts and table of alternate lubricants.

6) Troubleshooting instructions.

7) List of maintenance tools and equipment.

8) Name, address, and phone number of manufacturer and manufacturer's local service representative for major system components.

G. Manufacturer Services

1. Prior to scheduling services by the OSHGS Supplier, the Contractor shall verify the equipment installation and provide the completed installation checklist with photo documentation. Upon receipt of the completed installation checklist with photo documentation, the OSHGS Supplier shall schedule start-up and training to take place no sooner than two (2) weeks. The Contractor shall coordinate testing requirements and scheduling with the Engineer.

2. The OSHGS Supplier shall be present at each jobsite for the following time period after the system is installed, travel time excluded:

a. Certification of proper installation, system startup, and functional testing.

1) Installation inspection shall include supervising the correction of any defective or faulty work before acceptance by Owner.





2) System startup shall include testing, calibrating, and adjustment of all components for optimum performance.

3) Functional testing shall include inspection of integration of the provided equipment’s controls to the Owner’s SCADA system, etc. and verify all data are being sent and received.

b. Training Owner’s personnel and providing detailed instructions in the operation, maintenance, and troubleshooting for the system.

1) Upon request, a training manual shall be provided with an outline of the training procedures.

3. Services shall be provided by a technician that is factory-trained by the OSHGS Supplier and has demonstrated ability and experience in the installation and operation of the equipment.

PART 2 PRODUCTS

2.01 ON-SITE SODIUM HYPOCHLORITE GENERATION SYSTEM

A. Hypochlorite generation system includes the following to form a complete on-site sodium hypochlorite generation system:

1. Transformer rectifier & cabinet

2. Electrolytic cells

3. Piping, including water solenoid valve, brine solenoid valve, brine pump,

4. Hydrogen dilution system, including blowers and blower control panel.

5. Solution storage tanks, transfer tank, and transfer pump

6. Single PLC-based control panel containing system controls,

7. Water softener and water heater

8. All necessary interconnecting wiring and hardware shall form a complete on-site sodium hypochlorite generation system. The installation contractor shall provide all interconnecting piping and conduit, which shall be Sch 80 PVC. The OSHGS shall be factory-tested prior to shipping as one self-contained unit.

2.02 HYDROGEN SAFETY MANAGEMENT

A. The generators shall have no waste products associated with its use other than hydrogen gas, which is to be vented to the atmosphere. Hydrogen Dilution blowers shall be used to purge all residual hydrogen out of the system and storage tanks and dilute the hydrogen concentration 100 to 1 or below 25% of the LEL.

B. Any proposed system must meet every operational aspect of this specification. Hydrogen management shall be accomplished by the passive venting of each electrolytic cell without potential restrictions. This flow path should not have baffle plates, orifice plates or backpressure valves between the last point of product generation and atmospheric evacuation.

C. The presence of over-pressure rupture disks is not acceptable as the initiation of disk rupture would render the system inoperable. No hydrogen shall be vented directly to the hypochlorite storage tank where an accumulation could occur.

D. All hydrogen must immediately be released from each cell pack.

E. Minimum passive venting capability from each electrolytic cell pack shall be 4.0 square inches for every 100 pounds of chlorine production.

F. The hydrogen dilution system shall dilute the hydrogen concentration to below 25% of the LEL or 1% by volume.

G. Generator skid hydrogen dilution shall include passive vents connected to each cell and blower connected to the vent header. Sodium hypochlorite storage tanks shall be evacuated by blower.

H. Under no circumstance will the Hydrogen Safety Management requirements (Part 2.02) be relaxed or modified as they are critical operator safety features and core to the generator design.





2.03 ELECTROLYTIC CELL ASSEMBLY

A. All components of the electrolytic cell skid shall be pre-assembled, piped, wired to input and output, flanged, threaded, etc. connections located at easily accessible points on the skid.

B. Electrolytic cell skid assemblies shall be provided with the following overall dimensions:

1. Maximum equipment footprint: 76 inches long x 26 inches wide x 81 inches high.

C. Each electrolytic cell assembly shall have the following components and features:

1. Brine proportioning pump

2. Water solenoid valve.

3. Water and brine flow metering devices.

4. Electrolytic cells

5. Transformer rectifier.

6. Magnetic flow meter.

7. Level switches.

8. Temperature switches.

9. Temperature sensor.

10. Teflon and Kynar interconnecting tubing.

11. 304 stainless steel frame, electrolytically polished for passivation, corrosion resistance, and chemical compatibility.

a. The completed frame with all mounted components shall comply with the UBC structural requirements for seismic zone four.

D. The generator shall be factory wired, plumbed, and mounted on a self-contained skid assembly.

E. Each electrolytic cell shall be arranged so that it can be completely drained in place.

F. The skid mounted flow control panel shall consist of a water flow metering device, water sensor, brine flow metering device, and a brine pump.

G. The process shall operate in a batch environment allowing for consistent hypochlorite concentrations and greatest efficiencies.

H. The generator skid shall be supplied with a 4-20 mA electrolyte temperature sensor that shall function to return a linear signal proportional to 0-100°C, which shall allow continuous operation up to 130°F without interruption.

I. The generator package shall have the following redundant interlocked safety features:

1. Cell high temperature switch.

2. Low level switch for each cell.

3. Water flow sensor.

4. Transformer high temperature switch.

5. Automatic current regulation.

J. All electrical equipment and enclosures shall be built and certified to UL 508 standards and shall possess the appropriate label.

K. The generation system shall be pre-piped and skid-mounted.

1. The OSHGS skid frame shall be constructed of 304 stainless steel tube for structural strength. The entire skid shall undergo electrolytic polishing for ultimate passivation, chemical compatibility, and corrosion resistance. The completed frame with all mounted components shall comply with the UBC structural requirements for seismic zone four.

2. The skid frame shall be configured to allow easy access to all components, including the electrolytic cells. All vertical and horizontal frame connections shall be welded. The skid frame shall support, as a minimum, the following mounted equipment:

a. Generator electrolytic cells.

b. Power supply/rectifier.

c. Water and brine rotameters.

d. Control panel.





e. Interconnect pipes valves and fittings.

f. Interconnect conduit and wiring.

g. Water flow sensor.

h. Variable-speed, positive-displacement brine pump.

2.04 ELECTROLYTIC CELLS

A. Multiple electrolytic cells shall be provided as follows:

1. Cell Quantity: Minimum 3 cells each generator

2. Any system using fewer electrolytic cells than that specified above must demonstrate its ability to achieve 80% production capacity with one of the cells removed from service.

B. The electrolytic cell bodies shall be constructed of and clear acrylic materials, allowing for front and rear visual inspection of the electrodes from all angles.

C. Each electrolytic cell shall be constructed utilizing DSA coated titanium anodes and titanium cathodes.

D. The wetted cell components shall consist only of the electrodes and acrylic cell body.

E. Cells shall utilize titanium bolting hardware.

2.05 TRANSFORMER RECTIFIER

A. The D.C. Rectifier shall consist of a fully isolated three phase step down transformer and bridge rectifier. D.C. voltage output shall be fixed with multiple primary taps for + 5-10% voltage correction. D.C. ripple shall be less than 4% with a power factor of 99% or better.

B. The manufacturer’s standard SCR or diode rectifiers are acceptable, however this does not relieve the manufacturer from meeting the performance requirements specified.

C. Rectifier efficiency shall be 97% or greater.

D. The transformer/rectifier shall house a 4-20 mA D.C. current transducer and NEMA 3RX digital display of amperage.

E. The rectifier cabinet and base frame shall be constructed of 304 Stainless Steel and shall be of a modular design. All internal wiring connections and components will be easily accessible by removing the front access panel.

F. The transformer enclosure shall be removable from the skid assembly as one piece, allowing for unobstructed access to the transformer.

G. The transformer rectifiers shall be designed for the following operating conditions:

1. Transformer capacity: 41 KVA maximum, 480VAC/3PH/70A maximum, one transformer rectifier per generator skid.

H. The stepdown transformer rectifier shall be provided with the following accessories:

1. DC bridge rectifier utilizing three diode assemblies and an aluminum heat sink with 120 VAC cooling fan.

2. Panel-mounted electrical disconnect switch.

2.06 ELECTRICAL CONTROL PANEL

A. A single control panel MCP-2021 shall be provided to control both generators GEN-2021 & GEN-2022. At their option, the supplier may accomplish this with multiple control panels controlled by one central panel. Supplier is responsible for any wiring modifications and additional wiring and conduit changes required with multiple control panels.

B. The OSHGS Supplier shall provide a NEMA 4X, 304 stainless steel, electrical control panel, which shall include controls for the entire sodium hypochlorite generation and feed system. The panel shall be mounted onto the generator skid and pre-wired at the factory to system components. The control panel shall house the operator interface terminal (OIT), PLC, and terminal strips to fully support the functions of generator operation, tank level, and metering pump proportional control.





C. All controls and operations logic specified herein and as shown on the instrumentation loop diagrams required for the system shall be programmed in a Programmable Logic Controller (PLC). The control cabinet logic shall function at the PLC level where operating parameters shall be measured, corrected, scaled, reported, and controlled. Contractor shall coordinate with OSHGS Supplier and instrumentation supplier for proper integration of the system.

D. The control panel shall display all relevant operating parameters and/or alarm conditions. The OIT will serve as the operator interface, data input screen, and alarm log.

E. At a minimum, the panel shall have the following features, components, and functionality:

1. The generator shall automatically start and stop based on the high and low levels in the sodium hypochlorite storage tank.

2. The generator shall shut down and alarm for the following conditions:

a. Low electrolyte level in cell.

b. Hypochlorite temperature exceeds 115°F (55°C).

c. Inlet flow falls below a preset value.

d. Rectifier high or low amperage.

e. Rectifier high temperature.

f. Hydrogen dilution blower failure.

3. Low-low level alarm for hypochlorite storage tank.

4. High-high level alarm for hypochlorite storage tank.

5. Enclosure cabinet, 24" x 24" x 8", with ample interior volume so as to be easily wired and serviced.

6. 6" color touchscreen human-machine interface (HMI) with dedicated screens, including help dialogs covering all basic operations and detailed alarm explanations, for each portion of the process and Ethernet communications for PLC connection.

7. Allen Bradley MicroLogix 1400 programmable logic controller (PLC) with Ethernet communication protocol.

8. Rectifier controls.

9. Blower controls.

10. Analog inputs from the flow meter and residual analyzer to drive each VFD based on the appropriate flow, residual, or compound loop algorithm.

11. Logging and storing alarm history.

12. Security protection.

13. Dedicated 24 VDC power supply for PLC and HMI.

14. Emergency stop pushbutton.

15. Cabinet-mounted electrical disconnect switch.

16. Start-up shall be accomplished without the need for a laptop computer or proprietary software.

F. The OSHGS Supplier shall be responsible for programming the Generation System package control software. The OSHGS Supplier shall deliver to the Owner all PLC and HMI code for future reference prior to final acceptance.

2.07 HYDROGEN DILUTION BLOWER

A. Hydrogen dilution blowers shall be provided to dilute the hydrogen gas byproduct and vent to the exterior. All air from the blower and any fumes from the sodium hypochlorite generation system or storage tanks shall be vented outside the building.

B. Hydrogen dilution blowers shall be designed for the operating conditions as follows.

1. BLO-2041:

a. Capacity: 200 CFM.

b. Static Pressure: 2.0 in WC.

c. Motor power: 1/2 HP.

d. Motor RPM: 3450

e. Electrical service: 480V/3PH/60Hz.





2. BLO-2042:




d. Motor RPM: 3450


3. BLO-3041:




d. Motor RPM: 3450


C. The blower shall be AMCA type B spark resistant of cast aluminum construction. The blower shall be cast with commercial grade 319 cast aluminum, having a 3/16” minimum wall thickness. Housing halves should be attached with tapered lugs having a minimum 45 degree taper from centerline for additional strength. Inlets and outlets shall be round.

D. The blower wheel hub shall be an integral part of the wheel casting. The wheel shall be a radial-type wheel. The blower shall be statically balanced by removal of material only – no additional weights are to be used in the balancing process.

E. The blower shall be arrangement 4 with a base of 12 gauge steel (minimum).

F. Hydrogen dilution blower shall be PB Series by Cincinnati Fan or approved equal.

G. The hydrogen dilution blower shall be provided with the following accessories:

1. Inlet guard.

2. Teflon shaft seal.

3. Current sensor.

4. Differential pressure switch positioned in the dilution ductwork vent stack.

5. Software controlled safety interlocks to detect control system sequence failure.

2.08 AIR DILUTION BLOWER CONTROL PANEL MCP-2040

A. Panel Enclosure: NEMA 4X SS, Wall Mount (size as required-minimum 48"H x36"W x 12"D)

B. UL508A labeled industrial control panel.

C. The panel shall monitor and/or control the following:

1. (3) 1/2 HP, 480V, three phase Air Dilution Blowers

2. (3) Air Flow Switches

D. Element Location: Internal.

1. Panel Main Circuit Breaker Disconnect - 480V, 3Ph., sized as required, not to exceed 30A.

2. Power distribution circuit breakers, as required.

3. (3) each Blower Full-voltage Non-Reversing Starters

4. Current Threshold Relays for each of (3) Blowers

5. Phase failure relay.

6. Panel Surge Protection.

7. 120V Control Power Transformer, sized as required.

8. Control Relays, as required.

9. Breakers, Fuses, DIN Rail, Terminals, Distribution Blocks, and Misc. components as required.

E. Element Location: Front Cover.

1. Panel Nameplate

2. Panel Main Circuit Breaker Disconnect Operating Handle

3. Power OK Indicator Light – White (Push-to-Test)

4. (3) each Blower Off Indicator Light – Red (Push-to-Test)

5. (3) each Blower Running Indicator Light – Green (Push-to-Test)





6. (3) each Blower Fault Indicator Light – Amber (Push-to-Test)

7. (3) each Blower Hand-Off-Auto Selector Switch

8. (3) each Blower Overload Reset Pushbutton

F. Receive the following hardwired signals:

1. (3) each Air Flow Switch status

2. (3) each Blower Required

G. Provide dry contacts wired to terminal blocks for transmitting the following signals to the Chlorine Generator Control Panel:

1. (3) each Blower Running (as sensed by current threshold relays)

2. (3) each Blower Fault (motor overloads or breakers are tripped)

3. (3) each Blower H-O-A switch in Auto

4. (3) each Air Flow Switch status

H. Description of Operation:

1. When a Blower’s control switch is In Hand, the Blower shall run continuously. When a Blower’s control switch is in Off it shall be off. When a Blower’s control switch is in Auto, control and alarming shall be via the Chlorine Generator Control Panel.

2. Each Blower’s Running status shall be monitored by a current threshold relay around the Blower motor leads.

3. Blower and Air Flow switch status shall be transmitted to the Chlorine Generator Control Panel via hardwired dry contact closure outputs.

2.09 WATER FILTERS

A. Wall-mounted large-capacity cartridge type filter housing holding a filter cartridge for dirt, rust, and particulate matter shall be provided where shown on plans. The filter housing shall include NPT inlet and outlet connections and a mounting bracket that must be non-metallic construction. A polypropylene cap with Buna-N O-ring shall be supplied.

B. The filter cartridge shall be a 4-1/2” diameter, 50-micron, disposable cartridge. Cartridge shall be manufactured from a pleated non-woven and reusable polyester fabric with polypropylene core.

C. Two (2) pressure taps shall be provided to connect pressure gauges to measure the pressure drop across the filter.

2.10 WATER SOFTENER

A. A dual-tank automatic water softening system shall be provided to remove hardness in the feed stream to the OSHGS, plus provides brine water makeup. The softener shall be designed for the following operating conditions:

1. Water Softener:

a. Efficiency: 4000 grains exchanged per pound of salt.

b. Manufacturer: Kinetico Model CP-208S or approved equal.

c. Brine: From salt/brine tank TNK-3011

B. Softener shall remove hardness to less than ½ gpg. One tank shall be on-line during service. A water meter shall automatically initiate system regeneration. The water meter shall measure the processed volume and be adjustable. Water softeners that regenerate on a fixed time will not be acceptable. When the ion exchange capacity of one resin tank is nearly exhausted, the hydraulically-driven, flow-controlled switchover valve will automatically divert flow to the alternate tank while initiating brine backwashing of the first tank for regeneration of the ion exchange resin. During regeneration cycles, one tank shall provide water to service and to the regenerating tank. Regeneration shall use salt solution from the brine tank.

C. The regeneration control valve shall be top mounted (top of media tank), and manufactured from non-corrosive materials. Control valve shall not weigh more than four pounds. Control valve shall provide service and regeneration control for two media tanks. Inlet and outlet ports shall accept a quick connect, double O-ring sealed adapter. Interconnection between tanks shall be made through the regeneration valve with a quick connect adapter. Control valve shall operate using a





minimum inlet pressure of 25 psi. Pressure shall be used to drive all valve functions. No electric hook-up, electric timers, or gear motors shall be required. Control valve shall incorporate four operational cycles including; service, brine draw, slow rinse, and a combined fast rinse and brine refill. The brine cycle shall flow shall be opposite the service flow, providing a countercurrent regeneration. Control valve shall contain a fixed orifice eductor nozzle and self-adjusting backwash flow control. The control valve will prevent the bypass of hard water to service during the regeneration cycle.

D. The tanks shall be designed for a maximum working pressure of 125 psi and hydrostatically tested at 300 psi. Tanks shall be made of polyethylene and reinforced with fiberglass wrapping. Each tank shall include a 2.5 in. threaded top opening. Upper and lower distribution system shall be of a slot design. Distributors will provide even flow of regeneration water and the collection of processed water.

E. Each softener shall include a non-solvent, high capacity cation resin having a minimum exchange capacity of 30,000 grains/ft³ when regenerated with 15.0 lbs/ft³. The media shall be solid, of a proper particle size and shall contain no plates, shells, agglomerates or other shapes, which might interfere with the normal function of the water softener.

F. The water softener shall be provided with the following accessories:

1. 1-1/2-inch inlet and outlet pipe connections.

2. 1/2-inch HDPE tube with in-line check valve for feeding brine for regeneration.

3. 1/4-inch wastewater discharge to sewer for backwash waste.

2.11 BRINE TANK WITH PNEUMATIC FILL, FRP

A. A fiberglass-reinforced plastic (FRP) salt/brine storage tank shall be provided for the following operating conditions:

1. TNK-3011: Salt Silo

a. Diameter: 12’-0”.

b. Wal Height: 8’-0”.

c. Salt capacity: 30 tons.

B. Design Criteria

1. The brine tank vessel shall be designed for pressure service conditions as specified for Type I Grade 1 tanks in ASTM D 3299. Brine tank vessel shall conform to the following structural design criteria:

i. Working Pressure: Hydrostatic load of SG 1.2

i. Wind Load: 100 mph

i. Maximum Temperature: 140 °F

a. A 10:1 safety factor shall be used for internal pressure loadings and a 5:1 safety factor shall be used for external and vacuum loadings.

C. Quality Assurance

1. Tanks shall be manufactured in an RTP-1 Accredited manufacturing facility.

2. Visual defects shall be better than Level II on the inside of the vessel and better than Level III on the outside in accordance with ASTM D 2563 Table 1.

3. The manufacturer shall have been regularly engaged in the design and manufacture of brine make-up and storage systems tanks such as specified herein for at least five years. The manufacturer's experience shall include at least fifteen installations of equal or larger capacity than specified herein, that have been in operation for at least five years.

D. Materials and Construction

1. The brine tank shall be vertical and consist of FRP vessel, salt fill line, water distribution system, outlet plenum, salt and brine level controls, and all internals. The brine tank shall be cylindrical with a flat bottom and domed top. Vessel size and configuration shall be as shown on the drawings. Unit shall be complete with flanges, nozzles, manways, lifting lugs, anchor lugs, and other appurtenances.





2. The vessel shell shall be helically filament wound according to ASTM D-3299. Any shell fabrication by hand lay-up shall not be acceptable. Only the tank bottom and dome may be fabricated by hand lay-up. Any tank made of PVC, polypropylene, or any other material shall not be acceptable. Contact molded components and accessories, shall be fabricated in accordance with ASTM D 4097 and NBS PS 15-69. The resin used shall be a premium isophthalic polyester type such as AROPOL 7241 T-15 by Ashland Chemicals or approved equal. The resin will be exposed continuously to a saturated brine solution.

3. All non-molded surfaces shall be coated with resin incorporating paraffin to facilitate a full cure of the surface. All cut edges, bolt holes, secondary bonds shall be sealed with a resin coat prior to the final paraffinated resin coat. All voids to be filled with a resin paste.

4. The laminate shall consist of a single resin rich layer, with either c-veil or Nexus 111-00010 reinforcement followed by two 1-1/2-ounce layers of -1/2-ounce layers of random chopped strand glass, fully wetted out with resin. This interior surface shall yield a minimum 100-mil thick corrosion barrier. Filament wind over this to the required thickness. Exterior surface coat shall be paraffinated. Vessels shall be surface coated on the exterior with gel coat containing ultraviolet light such as UV-9. No thixotropic or other additives shall be used.

5. Other than those associated nozzles, couplings, manways, and top and bottom heads, the towers shall be filament wound in one piece with no more than one joint.

6. The minimum properties of filament wound laminate shall be as specified in ASTM D 3299.

7. 24” diameter manways shall be in accordance with ASTM D 3299. As a minimum, two manways (lower side, top) shall be provided for each tank. The top manway cover shall include over-pressurization relief protection.

8. Flanged nozzles, double flanged gusseted nozzles, bottom drain nozzle, and threaded full couplings shall be provided as required. Flanged nozzles with 1/8-inch thick EPDM full-face gaskets of 60 durometer shall be provided by the supplier. Press-molded flanges are not acceptable. Threaded full couplings shall be FRP.

9. The tank shall include salt fill connection, softener water connection, brine outlet connection, drain, overflow, salt level indicator, brine level indicator, and vent.

10. The minimum properties of contact molded laminate shall be as specified in ASTM D 4097.

11. Anchorage: Each tank shall be furnished with concrete anchors and hold down lugs, complete with 304 stainless steel plates, for proper anchoring of the tank as required by the design calculations. A minimum of four (4) hold down lugs shall be provided.

12. Unless otherwise specified, all fasteners, and metal attachments, such as anchors, brackets, etc. shall be ANSI 316SS.

13. If necessary based on installation location, vessels designed for outdoor use shall have the bottom 6’-0” of straight sheel insulated for protection against freezing. Insulation shall be 2” thick polyurethane foam and be covered with a 1/8” thick FRP protective covering and receive a white pigmented gel coat with UV inhibitors. The top of the insulation will be capped to seal out any moisture.

E. Accessories

1. The brine tank shall be provided with a full-radiused Sch 40 304 stainless steel salt fill line designed to receive salt pneumatically unloaded from a truck. Long-radius fittings shall be used. One aluminum quick connect adapter and cover shall be provided to connect the truck’s hose to the brine tank salt fill line as indicated on the drawings. One gooseneck vent shall be integrally molded into the brine tank dome. A vent dust collector bag shall be furnished and installed. The dust collector shall be properly sized for the salt fill rate and the brine tank capacity. The dust collector shall be polyester cloth material.

2. A water distribution system and a brine collection plenum shall be provided. Each assembly shall be securely installed in the brine/salt storage tank. Each assembly shall be designed to produce a saturated brine solution as required by the hypochlorite generators.

3. The brine tank shall be provided with a liquid level control assembly, including:

a. A pressure sensing-type electronic level transmitter.





b. Normally-closed, solenoid pilot-operated diaphragm valve shall have a brass body be ASCO 8210 Series. The solenoid valve shall open when brine solution level in the Brine Storage Tank is low. The solenoid valve shall close when the brine solution level in the Brine Storage Tank is high.

4. For tanks using granular or fine grade (less than 12 mesh) solar salt, a quartz rock filter bed shall be installed in the sump. The filter bed shall consist of a 5” layer of 0.125” x 0.125” on top of a 7” layer of 0.250” x 0.250”. The filter bed shall be evenly-distributed over the entire bottom of the vessel. All quartz rock shall be AWWA-washed and NSF-certified.

5. The salt level sensor shall be a cable measurement transmitter. Cable measurement transmitter shall continuously measure salt level in the brine tank with 0.25% accuracy. Measuring cable length shall extend the entire height of the brine tank to measure salt at all levels. The cable shall be constructed of material resistant to saturated brine. Transmitter shall be Bin Master “Smart Bob II A.O.” or equal.

6. For tanks with straight shell greater than 12’-0”, an OSHA-approved fiberglass ladder with safety cage shall be provided. The ladder shall be mounted to the vessel, but fully supported by concrete or other suitable support base. Attachment fasteners shall be stainless steel.

7. A fiberglass-encapsulated nameplate shall be provided. At a minimum, the nameplate shall include the following information:

a. Project name.

b. Installation location.

c. Service.

d. Specific gravity.

e. pH.

f. Pressure rating.

g. Temperature rating.

h. Resin.

i. Size.

j. Capacity.

k. Shipping Weight.

l. Date of manufacture.

8. Unless otherwise specified, all pipe and fittings shall be Sch 80 PVC and all fasteners stainless steel.

2.12 BRINE FILTERS

A. A wall-mounted cartridge type-filter housings holding a 10" cartridge for dirt, rust, and particulate matter from the brine stream shall be provided. The filter housing shall be feature NPT inlet and outlet connections and mounting bracket that must be non-metallic construction. A polypropylene cap with Buna-N O-ring shall be supplied.

B. The filter cartridge shall be a 50-micron, disposable cartridge.

2.13 SODIUM HYPOCHLORITE STORAGE TANK FRP OR HDLPE

A. A fiberglass-reinforced plastic (FRP) or high density linear polyethylene (HDLPE) sodium hypochlorite storage s shall be provided for the following operating conditions:

1. TNK-2023 – Transfer Tank (Sodium Hypochlorite Solution).

a. Diameter: 3'-0"

b. Max. Liquid Level: 8'-0"

c. Min. nominal capacity: 175 gallons.

d. Provide level sensor, connect level sensor to OGHS system PLC.

2. TNK-3031 – Sodium Hypochlorite Solution Tank.

a. Diameter: 9'-0"


c. Min. nominal capacity: 3500 gallons






3. TNK-3032 – Sodium Hypochlorite Solution Tank.

a. Diameter: 9'-0"


c. Min. nominal capacity: 3500 gallons


B. The sodium hypochlorite tank shall be upright, cylindrical, flat bottom, single wall tanks molded in a one-piece seamless construction by the rotational molding process (laminated or fabricated tanks will not be accepted. The material used shall be virgin polyethylene resin as compounded and certified by the manufacturer. All polyethylene resin material shall contain a minimum of a U.V. 15 stabilizer as compounded by the resin manufacturer.

C. The standard design specific gravity shall be 1.9. The minimum required wall thickness for the cylinder straight shell must be sufficient to support its own weight in an upright position without any external support. The top head must be integrally molded with the cylinder shell. The minimum thickness of the top head shall be equal to the top of the straight wall. The tank shall be designed to provide a minimum of 4 tie-down lugs integrally molded into the top head. The tie-down lugs shall be designed to allow tank retention in wind and seismic loading.

D. The sodium hypochlorite storage tank shall be properly vented and have a minimum of three inches clearance on all sides to allow for expansion and contraction.

E. The OSHGS Supplier shall provide a pressure sensing-type electronic level transmitter which shall provide a 4-20 mA level signal for proper for operation of the generation equipment and alarm initiation. Level controls for the tank shall be brought to the operator interface.

F. The sodium hypochlorite storage tank shall be supplied with the following accessories utilizing threaded bulkhead fittings:

1. Vent connection.

2. Fill connection.

3. Forced air blower connection.

4. Pump suction connection.

5. Drain and overflow connections.

6. 18-inch threaded access manway with cover.

1. Unless otherwise specified, all pipe and fittings shall be Sch 80 PVC and all fasteners stainless steel.

2.14 HYDROGEN DETECTOR

A. A hydrogen gas monitoring system shall be provided to continuously measure and display gas concentration and provide alarms when preset limits are exceeded. A transmitter shall send the signal to the control panel.

B. The gas monitoring system shall have a NEMA 4X enclosure and two-line, eight-alphanumeric character LCD display with linear 4-20 mA output signal.

C. Gas detector manufacturer:

1. Conspec Controls, model CN06

2. RKI Instruments, model 65-2451RK-04

3. Engineer approved equal.

2.15 COMMERCIAL STRENGTH HYPOCHLORITE DILUTION PANEL

A. Under emergency conditions commercially available sodium hypochlorite (10-12 percent solution) can be added if required via a commercial strength hypochlorite dilution panel provided by the OSHGS Supplier as part of the OSHGS.

B. The commercial strength sodium hypochlorite dilution panel shall include a wall-mounted PVC panel with the following instruments and accessories:

1. Inlet pressure regulating valve for potable water connection.

2. Inlet check valve for sodium hypochlorite feed.





3. Venturi eductor, polypropylene construction.

4. Polysulfone inline potable water rotameters for softened water supply and

5. Polysulfone inline commercial strength sodium hypochlorite rotameter.

6. Two (2) manually-operated flow control valves.

7. Outlet check valve.

8. Outlet isolation valve (ball valve).

9. Sch 80 PVC piping and fitting.

2.16 ACID CLEANING CART

A. A pre-assembled, mobile cart including acid cleaning tank and centrifugal pump shall be provided by the OSHGS Supplier for periodic washing of the electrolytic cells.

B. The cart shall be pre-piped and pre-wired prior to shipment. All piping, fittings, and valves shall be Sch 80 PVC. The 120VAC, single-phase plug shall be included for connection to a standard electrical receptacle.

C. A discharge hose, quick-connect couplings, and appurtenance shall be included to transfer acid to and from the electrolytic cells.

2.17 TOOLS, SPARE PARTS, AND MAINTENANCE MATERIALS

A. The OSHGS Supplier shall furnish one set of the following spare parts for each onsite sodium hypochlorite generator system:

1. One (1) electrolytic cell level sensor.

2. One (1) electrolytic cell temperature sensor.

3. One (1) brine pump spare parts kit.

4. One (1) spare parts kit for each backpressure and pressure relief valve.

5. One (1) complete electrolytic cell including cell housing (loose electrodes are not acceptable).

B. Spare parts shall be packed in sturdy containers with clear indelible identification markings and shall be stored in a dry, warm location until transferred to the Owner at the completion of the contract.

C. The OSHGS Supplier shall furnish an initial supply of all greases and lubricants required to start operations. Supply an amount of these materials necessary for one year of continuous operation.

2.18 HYPOCHLORITE TRANSFER PUMP

A. PMP-2024: Provide transfer pump to transfer sodium hypochlorite from transfer tank TNK-2023 to sodium hypochlorite solution tanks TNK-3031 and TNK-3032.

B. Pump basis of design:

1. Pump shall pump TNK-2023 in a batch process to empty the tank to a pump shutoff level.

2. Pump level shall be determined by LT2025.

3. Pump shall turn on at high level, and shut off at low level. High and low levels shall be adjustable in the generation system control panel.

C. Pump conditions:

1. Pump shall be sized to transfer sodium hypochlorite solution to storage tanks at a rate greater than the maximum production rate of the chlorine generation system. Recommended flow rate: 25 gpm.

2. Pump conditions: Static head: 18 feet. Dynamic head: < 5 feet, supplier shall confirm, based on final piping layout and pump flowrate.

D. Spare Parts: Provide second pump, identical to PMP-2024, as a redundant back-up pump to PMP-2024.

PART 3 EXECUTION

3.01 FACTORY ASSEMBLY AND TESTING

A. The OSHGS shall be pre-assembled at the manufacturing location.





B. System shall be tested for a minimum of eight hours at the location of assembly to assure it is in full compliance with the requirements of the specific design for the project and this specification.

C. Factory testing shall include visual inspection of all equipment, complete assembly, and functional testing of equipment including leak testing, piping and instrumentation check, verification of control panel wiring and operation, and confirmation of proper operating parameters.

D. Engineer and/or Owner reserve the right to be present at the OSHGS Supplier’s manufacturing facility to witness factory testing. Engineer and/or Owner shall provide intent to witness factory testing at the time of the design submittal review and approval, and OSHGS Supplier shall provide notice to Engineer and/or Owner regarding the scheduled time of the factory testing at least five business days in advance of the proposed factory test.

E. The OSHGS Supplier shall maintain Quality Control documentation that includes system test settings and measured performance.

3.02 DELIVERY, STORAGE, AND HANDLING

A. The OSHGS shall be packaged and shipped so as not to incur damage to any portion of the equipment through handling and installation of the system itself.

B. The Contractor shall be responsible for the delivery, storage, and handling of products in accordance with the OSHGS Supplier’s recommendations.

C. The Owner shall inspect all equipment and materials against approved Shop Drawings at time of delivery. Equipment and materials damaged or not meeting requirements of the approved Shop Drawings shall be immediately returned to the OSHGS Supplier for replacement or repair.

D. Equipment and materials shall be stored in a dry, chemical-free location and protected from the elements according to the OSHGS Supplier's instructions.

E. Equipment and materials shall be handled in an approved manner according to the OSHGS Supplier's instructions.

3.03 INSTALLATION

A. Installation of the generator, tanks, metering pumps, and appurtenances shall be performed by the Contractor and shall be in accordance with the Drawings and with the OSHGS Supplier’s instructions and recommendations. Conflicts of information shall be called to the attention of the Engineer. It is the Contractor’s responsibility to provide:

1. Water piping and valves from source to water softener, if applicable, and from softener to brine tank and electrolytic cell skid.

2. Brine piping and valve from brine tank to electrolytic cell skid.

3. Sodium hypochlorite piping and valves from electrolytic cell skid to sodium hypochlorite storage tank(s), from sodium hypochlorite storage tank(s) to metering pump(s), and from metering pump(s) to point of application.

4. Vent piping, valves, and stack from hydrogen dilution blower to electrolytic cell skid vent connection and onwards.

5. Vent piping, valves, and stack from hydrogen dilution blower to sodium hypochlorite storage tank(s) and onwards.

6. All overflow and drain piping and valves.

7. Electrical connections, wiring, and conduits to/from system control panel for power, control, and alarm interfaces with remote located instruments (tank level and pressure transmitters, etc.), plant SCADA, etc.

a. All wiring to be TTHN stranded wiring and shall conform to the most current version of the National Electric Code.

b. All 4-20 mA instrumentation wiring will be 2- or 4-conductor shielded cable.

c. Instrumentation and signal/control wiring will be run in conduits separated from all other AC wiring systems.





8. Gaskets, seals, and O-rings for hypochlorite service shall be constructed of Hypalon, PTFE, or FKM. Santoprene or neoprene shall be used for brine service. EPDM shall be used for water and ammonia.

9. Any necessary unistrut, hangers, supports, etc. for Contractor-supplied piping and conduits.

10. Anchor bolts, suitable concrete mounting pads and other incidentals as necessary to complete the installation.

11. Hydrostatic leak testing of brine and sodium hypochlorite storage tanks.

12. Pressure testing of all interconnecting piping as required by piping specifications.

13. Flushing of all piping with potable water prior to system start-up and commissioning to remove materials that may have entered as a result of the installation process.

B. All equipment units or assemblies shall be installed on concrete bases and secured with anchor bolts in accordance with the OSHGS Supplier's recommendations and as shown. Contractor shall be responsible for the design of the equipment pads. The contractor shall coordinate with OSHGS supplier for skid placement and anchoring.

C. Contractor shall inspect all concrete pads for proper elevation, dimensions, cutouts, evenness and anchor bolt locations and correct if necessary.

D. The Contractor shall inspect all equipment before installation, if damaged; notify the Engineer and OSHGS Supplier promptly. Do not install damaged equipment until the OSHGS Supplier makes repairs in accordance with OSHGS Supplier’s written instruction and approval.

E. The Contractor shall, after installation of storage tanks is complete but before piping connections are made, block all outlets and fill each tank with potable water and tested for leakage for a minimum of 24 hours prior to system start-up and commissioning. Any leaks that are observed will be repaired and the tank re-tested.

F. Contractor shall provide a drain for each piece of equipment, according to the OSHGS Supplier's instructions.

G. Power shall be provided by the Contractor to the system control panels as shown on the OSHGS skid drawings. The Contractor shall be responsible for providing all necessary conduit and wiring necessary for a complete electrical service to this location. All wiring shall comply with the National Electrical Code.

H. Installation shall include furnishing and applying an initial supply of lubricants, as provided by the OSHGS Supplier.

I. Contractor shall support piping independent of equipment. Equipment shall be free from all loads and stresses induced by the piping.

J. All equipment including motors, belts, and drives shall be aligned to the best industrial standards. Field check and adjust all equipment alignments in the presence of the Engineer.

K. The Contractor shall inspect all equipment before installation, if damaged; notify the Engineer and OSHGS Supplier promptly. Do not install damaged equipment until the OSHGS Supplier makes repairs in accordance with OSHGS Supplier’s written instruction and approval.

L. Tie-down lugs for tanks shall be grouted or shimmed to prevent excessive loads being transferred to the tank shell.

M. Make all electrical connections in conformance with the requirements of the electrical specifications.

3.04 START-UP SERVICES AND FUNCTIONAL TESTING

A. A factory technician from the OSHGS Supplier's field services personnel or factory trained representative shall be present at the jobsite for initial system start-up/commission of equipment as specified in section 1.03 above. Supplier's field services personnel or factory trained representative shall supervise correction of any defective or faulty work before and during start-up.





B. Factory technician shall insure that the systems are properly installed, start-up the systems, and train the Owner's personnel.

C. Contractor and OSHGS Supplier shall make equipment adjustments required to place system in proper operating condition.

3.05 PERFORMANCE TESTING

A. The Contractor shall be responsible for all incidental costs associated with OSHGS performance testing other than labor provided by the OSHGS manufacturer, including costs for salt, water, power, and disposal.

B. Prior to commencing the performance test, the entire OSHGS shall be operated for not less than eight continuous hours in order to demonstrate the mechanical and electrical integrity of the system. Any mechanical or electrical breakdowns, unusual vibrations, or control sequencing problems shall be considered sufficient cause to reject the test.

C. The performance test shall be conducted upon start-up or up to 300 hours after operation for cell acclimation if the unit does not pass the initial test. The Contractor shall make any additions or modifications to the OSHG as may be necessary, at no additional cost to the Owner, and the performance tests for the system shall be repeated in its entirety. The duration of the tests and detailed test procedure shall be submitted for approval prior to the testing period.

1. During testing, low-low and high-high levels, control valves, transformer voltage, and all other adjustable parameters shall be held constant. Clean, stable power and consistent water pressure at required temperatures must be maintained at all times. Changes in OSHGS operating conditions shall not be permitted. All fine tuning of operating conditions shall be performed prior to testing.

2. Design operating conditions shall be maintained for a minimum of eight hours. During this time, all pertinent operating parameters shall be monitored and recorded, sufficient sampling and analysis shall be conducted to demonstrate that sodium hypochlorite generation is at design conditions.

3. Source water hardness, softened product hardness, and blower airflow rate shall be measured once at the beginning of the test and once at the end of the test.

a. Hardness levels shall be determined by EDTA titration.

4. Brine flow rate, softened water flow rate, DC amperage, cell outlet temperature, and sodium hypochlorite concentration levels shall be measured once every 30 minutes. All operating pressure shall also be recorded at this time.

a. Sodium hypochlorite concentration shall be determined by redox titration.

b. All other data shall be direct instrument reading.

5. An analysis of the performance tests shall be submitted. The calculated consumable units shall be as specified in Section 1.01.B. Should the OSHGS performance not meet the performance requirement, that system shall have failed the performance test. The Contractor shall make any additions or modifications to that OSHGS as may be necessary, at no additional cost to the Owner, and the performance tests for that system shall be repeated in its entirety.

3.06 IDENTIFICATION AND MARKING

A. The OSHGS, along with all applicable components, shall be marked and identified for all health, flammability, and reactivity of hazardous materials as required by all applicable jurisdictional building codes, statues, standards, regulations, and laws.

END OF SECTION




LIQUID CHEMICAL EQUIPMENT 46 3383 - 1

SECTION 46 3383 LIQUID CHEMICAL EQUIPMENT

PART 1 GENERAL

1.01 SECTION INCLUDES

A. Metering Pumps.

B. Feed Accessories.

C. PVC Ball Valves.

D. Check Valves.

E. Strainers.

F. Rotameters.

G. PVC Chemical Feed Pipe and Fittings

H. Backpressure valve

I. See Instrumentation and Control Drawings for more information.

1.02 REFERENCES

A. ASTM D1785 - Standard Specification for Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedule 40, 80 and 120.

B. ASTM D1998 - Standard Specification for Polyethylene Upright Storage Tanks.

C. ASTM D3350 - Standard Specification for Polyethylene Plastics Pipe and Fittings Materials.

D. ASTM D4097 Standard Specification for Contact - Molded Glass - Fiber Reinforced Thermoset Resin Corrosion - Resistant Tanks.

1.03 SUBMITTALS

A. See Section 01 3000 - Administrative Requirements, for submittal procedures.

B. Fixed sum equipment submittal as described in Article 25 of Section 00200.

C. Shop Drawings Showing:

1. Arrangement, dimensions and materials.

2. Equipment performance data and operating characteristics

3. Manufacturer's catalog data, marked to indicate materials being furnished.

D. Operation and Maintenance manuals as described in Section 01 7800.

E. Manufacturer's Certificate: Certify that products meet or exceed specified Requirements.

1.04 DELIVERY, STORAGE, AND PROTECTION

A. Refer to Section 46 0500 - Equipment Installation.

1.05 WARRANTY

A. Full warranty against defects in materials and workmanship for two years after substantial completion, including all parts, labor, and expenses.

1.06 SERVICE REPRESENTATIVE

A. Provide qualified service representative to perform functions described in Section 01 4000 and to sign the Certification of Proper Inspection attached to Section 01 4000.

B. Include necessary trips by the Manufacturer's representative to provide two 8-hour work days on-site (travel time not included) for startup and training of operations personnel.

C. Any additional trips required by the Contractor before or after final startup and training not charged to the Owner.





PART 2 PRODUCTS

2.01 PERISTALTIC METERING HOSE PUMPS

A. Furnish all labor, materials, equipment and incidentals required and install, field test, complete and ready for operation hose pumps for chemical pumping systems and wastewater sample pumping, as indicated and as specified herein.

B. Approved Manufacturer:

1. Watson-Marlow, Inc / Bredel, Apex Model 28

2. Verder, Verderflex Series Dura 25

3. Engineer approved equivalent.

C. General

1. Pumps shall be positive displacement peristaltic type hose pump complete with lubricated pumphead containing two (2) integral pressing shoes, reinforced hose element, and self contained variable speed drive. Peristaltic pumping action is created by the compression of the flexible hose between the pumphead rollers and track, induced forward fluid displacement within the hose by the rotation of the pump rotor, and subsequent vacuum-creating restitution of the tube.

2. Pumps shall be dry self priming, capable of being run dry without damaging effects to pump or hose, and shall have a maximum suction lift capability of up to 25' vertical water column.

3. Max pressure rating: 45 psi.

4. Pump shall use no check valves or diaphragms and shall require no dynamic seals in contact with the pumpage. Process fluid shall be contained within pump tubing and shall not directly contact any rotary or metallic components.

5. Flow shall be in the direction of the rotor rotation, which can be reversed and shall be proportional to rotor speed.

D. Construction

1. Pumphead

a. Each pump shall consist of a sealed lubricant filled housing, bolted housing cover, pump hose, rotor assembly, and one-piece connectors. The lubricant shall normally be a compounded food grade glycerin/propylene glycol blend. Lubrication shall be filled to 40-50 percent of pump housing capacity.

b. The hose shall be constructed from an appropriate elastomer re-enforced by two or more braided nylon layers. All hoses regardless of size shall be rated for a minimum of 175 PSIG continuous operation and have a minimum burst pressure of 800-PSIG.

c. The rotor shall have two integral pressing shoes, located 180-degrees apart for compression of the hose against the track twice per rotor revolution. Manufacturer shall supply the rotor applicable for the conditions in the Pump Schedule.

d. Valveless/Glandless design. No seals shall be in contact with the pumped product.

e. Pump shall include high lubricant leak detection to detect leakage of pumped product into the pump housing for indication of hose failure. Device shall be a field selectable NO/NC two-wire switch, with output from the pump to monitor hose failure.

f. Pump head shall be driven by gear reducer.

1) Provide gearing with Fully Protected Drive direct-coupled mounting to the pump housing

2) Design gear reduction to match output speed requirement of the pump matching torque rating of pumping equipment. Gearing shall be classified for continuous duty.

2. Hose

a. Hose material shall be as recommended by pump manufacturer for compatibility with the process fluid.

b. The hose shall be replaceable without removing the pump.

c. Hose and flanges shall be compatible with the pumped fluid, for aggressive chemicals these flanges shall include a polypropylene wetted insert.





3. Drive

a. Rating: Continuous 24 hr operation, 40-degC ambient.

b. Supply: 240V, 60 Hz, 1-Phase and fused. Max drive power consumption: 2300VA. Provide NEMA 6-20P plug and cord of suitable length to connect to receptacle.

c. Enclosure: Vented IP31(dry location) ingress protection rating.

d. Housing:

1) Pump Housing: Coated cast iron

2) Cover shall contain threaded drain plug, clear window for viewing rotation, vent cap, and lubricant registration mark for proper indication of lubricant level when pump is stationary.

3) Provide pump assembly painted with manufacturer’s standard paint specification

4) Top housing: ABS

e. Operator keypad with manual control of:

1) Start/Stop

2) Forward/Reverse

3) Speed increase/decrease

4) Manual/Analog speed control reference source switching

5) “Auto restart” capability to resume last set running status after recovering from loss of mains power

6) “Operator lockout” capability to lock out all keys except start/stop to prevent operational error in the event of incidental contact with the keypad

f. Pump shall have LCD display for clear indication of rpm when in the manual mode, auto/manual status and indication of rotation direction.

g. Pump shall be capable of communicating with plant SCADA system via Modbus TCP/IP for remote operation of all the functions of the pump, including speed control.

h. Motor and drive circuitry shall be enclosed within the IP31 rated drive housing.

i. Provide premium efficient, TEFC or TENV, squirrel-cage induction motors, rated for use with variable frequency drive, conforming to the latest applicable requirements of NEMA, IEEE, ANSI, and NEC standards.

j. Motors shall suitable for use with PWM type variable frequency drives. NEMA 4X variable frequency drive to be mounted to pump motor. Input power to be 240VAC. Drive shall be pre-wired to pumps.

k. Max drive speed shall not exceed that specified under the Process Pump Schedule and shall be variable.

l. Mounting: Drive shall be self supporting and shall not require anchoring.

4. Connections

a. Supply pump with ANSI/ASA 150# flanged inlet and outlet connections with wetted inserts compatible with the process fluid in this specification.

5. Spares

a. Supply 1 spare hose per pump.

b. Supply sufficient lubricant for two (2) hose changes per pump.

c. Provide all special tools for normal maintenance.

2.02 FEED ACCESSORIES

A. Wall stand for mounting each pump.

1. Size: Minimum 12" wide by 15" deep.

B. One chemical handling safety equipment kit shall be provided. The kit shall include, but shall not be limited to: chemical splash goggles, dust and mist respirator, rubber gloves, and rubber apron, all packed in a suitable carrying case.

2.03 PAINTING

A. Equipment that requires finishing shall have manufacturer's shop coating compatible with water treatment plant environment.





2.04 PVC BALL VALVES

A. PVC body.

B. Integral body, permanently assembled handle, socket connections, and integral vented ball and stem that prevents stem blowout and backlash in ball position.

C. The handle to stem connection shall be achieved by interlocking, molded keyways locked in position by the cap.

D. Material meets or exceeds the requirements of 12454B according to ASTM D-1784.

E. Socket end connection dimensions conform to ASTM D-2467.

F. Pressure rating: 150 psi at 68°F.

G. Viton or Teflon seals.

H. Ball valve types and seals are as follows:

1. Full Union Body - Viton or EPDM seal.

2. Compact Body - EPDM or Teflon seal.

I. Service: Chemical feed lines of sodium hypochlorite.

J. Approved Manufacturers:

1. GF Plastics, Model: Compact Ball Valve Type 500, Type 550.

2. Spears, Model: 2122


2.05 CHECK VALVES

A. Ball Check Valves:

1. Solvent socket connections with dimensions conforming to ASTM D-2467.

2. Interior: Molded ribs to serve as a cage and ball guide assuring proper seating.

3. PVC body and ball meets or exceeds the requirements of Class 12454B of ASTM D-1784.

4. Pressure rating: 150 psi at 68°F.

5. Service: Chemical feed lines of sodium hypochlorite.

6. Approved Manufacturers:

a. GF Plastics. Model: Type 360 Ball Check Valve PVC.

b. Engineer approved equivalent.

B. Pinch Valves ("Duckbill" Elastomeric Check Valves)

1. Check valves are to be all rubber and the flow operated check type with a flanged end connection. The port area shall contour down to a duckbill, which shall allow passage of flow in one direction while preventing reverse flow. The flange and flexible duckbill sleeve shall be one piece rubber construction with nylon reinforcement.

2. The flange drilling shall conform to ANSI B16.1 Class 125/ANSI B16.5, Class 150 Standards. The valve shall be furnished with steel back-up rings for installation.

3. Manufacturer must have flow test data from an accredited hydraulics laboratory to confirm pressure drop data. Company name, plant location, valve size and serial number shall be bonded to the check valve. Valves shall be manufactured in the USA.

4. Approved Manufacturer:

a. Red Valve Co., Inc. - Model: Series 35.

b. Engineer Approved Equivalent.

C. Transparent Y-Check Valves

1. Spigot type pipe connections.

2. A weighted piston seat carrier assures tight sealing in either the horizontal or the vertical plane.

3. Valve end (bonnet): Configured with a removal eye to permit disassembly by using a metal pin.





4. Valve body: Translucent PVC which meets or exceeds the requirements of 12454B according to ASTM D-1785.

5. End connections: In accordance with ASTM D-1785.

6. Pressure rating: 150 psi at 68°F.

7. Service: Chemical feed lines.

8. Approved Manufacturers:

a. GF Plastics. Model: Type 304 Y-Check Valve PVC.

b. Engineer Approved Equivalent.

2.06 STRAINER

A. Bronze or PVC body.

B. PVC or stainless steel 20 mesh screen.

C. 150 psi at ambient temperature.

D. Ability to change worn or blocked filter screens with filter body on line.

E. Provide EPDM O-rings for tight bonnet seal.

F. Approved Manufacturers:

1. True Union "Y" Strainer.

2. Watts.

3. Engineer Approved Equivalent.

2.07 ROTAMETER

A. Furnish and supply rotameters to permit adjustment and control of proper water-to-chemical ratio. Coordinate size in schedule with feeder manufacturer.

B. Rotameters: Equipped with scales as scheduled in gpm, 100 psi minimum working pressure, vertical in-line NPT connections, ten to-one rangeability, stainless steel and glass wetted surfaces.

C. Rotameter shall have a turndown ratio of 10:1.

D. Approved Manufacturers:

1. Brooks Model: Full-View Model # 1114.


2.08 PVC CHEMICAL FEED PIPE AND FITTINGS

A. Chemcial feed piping shall be pre-piped and skid mounted to the back board per detail, sheet P901.

B. Pipe and fittings manufactured from a Class 12454-B virgin compound conforming to ASTM D1784 specifications.

C. Pipe: Conform to ASTM D1785 specifications.

D. Fittings: Conform to ASTM D2467 (Schedule 80) specifications

E. Joints: Solvent weld type, meeting ASTM D2564 and ASTM D2672 specifications.

F. Install pipe in 20-foot lengths wherever possible.

G. All pipe and fittings used for chemical solution lines, chemical feed lines, and sample lines shall be rigid PVC, Schedule 80, with solvent weld joints for 1/8" through 4". Threaded or flanged joints shall be used for piping 4" and larger.

H. Cement and primer used for solvent weld joints shall also be tested and approved by NSF.

2.09 BACK PRESSURE / ANTI-SIPHON VALVE

A. Back pressure / anti-siphon valve shall be provided with chemical feed system.

B. Spring loaded diaphragm shall provide positive discharge pressure to stabilize pump output.

C. Size back pressure / anti-siphon valve per manufacturer’s recommendations based on pressure rating of pump.





PART 3 EXECUTION

3.01 EXAMINATION

A. Verify areas are ready to accept.

3.02 INSTALLATION

A. Installed in accordance with manufacturer's recommendations and Section 46 0500, as shown on the plans, by qualified craftsmen.

B. Location, orientation and quantities are shown on the Plans.

C. Include all required related items for a complete installation.

3.03 TESTING

A. Water and chemical solution lines shall be pressure tested for at least one hour with no loss of pressure.

B. Test Pressure: 150 PSI.

C. Test Medium: Water.

D. Specified test shall be made at the expense of the Contractor, and to the satisfaction of the Engineer.

E. Services of a factory technician shall be provided for start-up. After all pumps have been completely installed, and after Contractor has completed inspection, operation, testing, and adjustment, chemical feed system supplier’s representative shall conduct a running test in the presence of the Engineer and Owner personnel or proxy, demonstrating the system ability to deliver the rated capacity and operating pressure. Contractor to provide labor, piping, and equipment for these tests.

3.04 SCHEDULES

A. Chemical: Sodium Hypochlorite.

1. Quantity: 2.

2. Tag Number: PMP-2038, PMP-2039.

3. Fluid Properties:

a. Type/Concentration: 0.8%.

4. Capacity range (GPM): 0.35 to 6.5, each pump.

5. Maximum pressure (psi): 45.

END OF SECTION

E500

E - ELECTRICAL

ELECTRICAL DETAILS

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200203

2021JV

MAH

ABERDEEN WATER TREATMENT PLANT

DISINFECTION SYSTEM IMPROVEMENTS

ABERDEEN, SOUTH DAKOTA

NO. DATE BY REVISION DESCRIPTION

DRAWN BY:

APPROVED:

CAD DATE:

CAD FILE:

JOB DATE:

JOB NUMBER:

SHEET NO.

BAR IS ONE HALF INCH ON

OFFICIAL DRAWINGS.

0 1/2"

IF NOT ONE HALF INCH,

ADJUST SCALE ACCORDINGLY.

SCALE:

VFD DETAIL

NONE

SCALE:

EF/MD

CONTROL ELEMENTARY

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14374

ANDREW R

VENZKE

1 6.3.2021 ARVADDENDUM NO. 1

Addendum #1

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ETHERNET-MODBUS TCP/IP AUTOMATIC CONTROL & STATUS PER P&ID

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(VFD) HOA

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VFD

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AUTO-CONTROL VIA COMM.

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HAND-RUN FWD, SPEED REF VIA HIM

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DIGITAL INPUT

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DRIVE ENABLE/DISABLE

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OVERTEMP

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VFD - PMP-1050

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VFD COMMON

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120V EF CIRCUIT P7-10

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MD-2047 END SWITCH

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T'STAT (BY MC)

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MD-2048

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CR1

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MD-2047

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MD-2048 END SWITCH

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CR1

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EF-2046

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NOTE:THE ELECTRICAL CONTRACTOR SHALL PROVIDE THE CONDUITS, CONDUCTORS, THE ELECTRICAL CONTRACTOR SHALL PROVIDE THE CONDUITS, CONDUCTORS, AND RELAY REQUIRED TO IMPLEMENT THE FAN AND DAMPER CONTROLS INDICATED. THE CONTROL RELAY SHALL BE 20A RATED, SUITABLE FOR OPERATING A 1/2 HP MOTOR, WITH A 120V OPERATING COIL IN A NEMA 1 ENCLOSURE. LOCATE RELAY ADJACENT TO PANEL L7.

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OUTLET NUMBER

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ROOM NUMBER

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BUILDING NUMBER

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3 PORT OUTLET FACE PLATE DETAIL

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EXISTING SWITCHBOARD MSB1 1600A 277/480V, 3PH, 4W

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PANEL L7

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70A 2P

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70A 3P

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70A 3P

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P1001

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P1002

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P1009C

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P1009B

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P1009A

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T7 480: 120/240VAC 25KVA,1

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DSC-L7

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200A W/125A FUSES

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TR-2021

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CHLORINE GENERATOR RECTIFIER NO. 1

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TR-2022

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CHLORINE GENERATOR RECTIFIER NO. 2

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30A 3P

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30A 3P

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AIR DILUTION BLOWER CONTROL PANEL

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MCP-2040

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P1009

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P1017

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ELECTRIC WATER HEATER

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EWH-2001

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AIR DILUTION BLOWER NO. 1

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BLO-2041

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BLO-2042

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BLO-3041

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P1010

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P1011

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P1015

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TELECOMMUNICATIONS

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6/4/21

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DISINFECTION SYSTEM MPROVEMENTS CITY OF ABERDEEN, …