2-Signed Addendum 01 16JULY2026.pdf

Revised July 16, 2026 Addendum No. 01

00 91 13. 01 - 0

NOTICE

TO: All plan holders

DATE: July 16, 2026

FROM: Jason Draper, P.E.

Chief Engineer Salt Lake City Public Utilities 1805 West 500 South, Salt Lake City, Utah 84104

(801) 483-6840 FAX (801) 483-6818

SUBJECT: Addendum No. 01 to the Contact Documents for Digester Complex Upgrades Blanket Purchase Order for Gas Purification Scrubbers, Project No. 524905449

Transmitted herewith is ADDENDUM No.01 to the contract documents for the above mentioned project.

All bids submitted without the signed acknowledgment of this Addendum will be rejected.

Jason Brown (Jul 16, 2026 15:22:11 MDT) https://secure.na1.documents.adobe.com/verifier?tx=CBJCHBCAABAA2bnBeTlHLr2YN-6RJawtVudZ2xYOL1yq

00 91 13. 01 - 1

DOCUMENT 00 91 13. 01

ADDENDUM No. 01

PART 1 GENERAL

1.1 DOCUMENT INCLUDES

A. Changes to the Bid Documents.

1.2 CONSTRUCTION CONTRACT

A. Digester Complex Upgrades Blanket Purchase Order for Gas Purification Scrubbers B. Project No. 524905449 C. Date: July 16, 2026

PART 2 CHANGES

2.1 CHANGES TO PRIOR ADDENDA

A. NONE

2.2 CHANGES TO BIDDING REQUIREMENTS

A. Add the following Documents to Attachment A: DCU Gas Purification Scrubbers Pre-

Purchase Specifications and Drawings:

• 40 99 90 Package Control Systems

• 43 32 59 Gas and Liquid Purification Scrubbers

2.3 CHANGES TO AGREEMENT AND OTHER CONTRACT FORMS

A. NONE

2.4 CHANGES TO CONDITIONS OF THE CONTRACT

A. NONE

2.5 CHANGES TO SPECIFICATIONS

A. NONE

2.6 CHANGE TO DRAWINGS

A. NONE

PART 3 ACKNOWLEDGEMENT

3.1 Acknowledgement of receipt of this addendum is made in paragraph 1.4 A. ADDENDA of

Section 00 41 00.

3.2 All bids submitted without the signed acknowledgment of this Addendum will be rejected.

00 91 13. 01 - 2

END OF ADDENDUM

Rev. 0 Package Control Systems DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 40 99 90-1 Salt Lake City New WRF – 524905398

SECTION 40 99 90

PACKAGE CONTROL SYSTEMS

PART 1 - GENERAL

1.01 DESCRIPTION:

A. Provide a complete operating control system including the design, documentation, supply, delivery, installation, tuning, testing, commissioning, and warranty.

B. Assemble panels and install panel instruments and wiring in equipment manufacturer’s factory.

C. Test panels and panel assemblies for proper operation prior to shipment from equipment manufacturer’s factory.

1.02 SPARE PARTS:

A. Comply with the requirements specified in Section 01 61 00.

B. Provide spare parts that are identical to and interchangeable with similar parts installed.

1. Selector Switch, Pushbutton, and Pilot Light: one of each type used.

2. Light Bulb: one of each type used.

3. Fuse: two of each type and rating used.

4. Surge Suppressors: one of each type used.

C. Provide a list of recommended spare parts for the first year of operation and for the first five years of operation, including a price list and location of the nearest facility from which all spare parts can be obtained.

1.03 QUALITY ASSURANCE:

A. Comply with the requirements specified in Section 01 43 00.

1.04 DELIVERY STORAGE AND HANDLING:

A. Comply with the requirements specified in Section 01 66 10.

1.05 WARRANTY:

A. Comply with the requirements specified in Section 01 78 36.

DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 40 99 90-2 Salt Lake City New WRF – 524905398

PART 2 - PRODUCTS

2.01 CONTROL PANELS:

A. Refer to Section 26 27 17.

2.02 CONTROL PANEL COMPONENTS:

A. Refer to Section 40 78 00.

B. Provide a Request for Equal notice to the Engineer with equivalent industrial-grade parts as listed in Section 26 27 17 if the manufacturer users a PLC or similar logic controller and does not offer a Schneider M580 PLC option.

C. Provide an internal on-line uninterruptable power supply (UPS) for panels not powered by a UPS source.

1. All UPS components shall be sourced from a single manufacturer.

2. Battery shall be sized to sustain the panel fully operational for 30 minutes without power.

3. The UPS shall be listed or labeled by UL.

4. The UPS shall not block or impede access to any component in the panel.

5. Environmental conditions:

a. Ambient Temperature: 32 degrees℉ to 104℉.

b. Relative Humidity: 0 to 95 percent, non-condensing.

c. Altitude: Sea level to 4221 feet.

6. UPS shall have displays, indications, and basic system controls accessible.

7. UPS shall alarm to the controller in the event of a fault.

D. The following pilot device colors shall be used:

1. Running Status Light: Green

2. Stopped Status Light: Blue

3. Position Open Status Light: Green

4. Position Closed Status Light: Blue

5. Alarm Status Light – Major or Safety: Red

DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 40 99 90-3 Salt Lake City New WRF – 524905398

6. Warning or Minor Alarm Status Light: Amber

7. Ready Status Light: Blue

8. Operating Mode – Normal Mode: Blue

9. Operating Mode – Alternate Mode: Amber

10. Start Pushbutton: Green or Black

11. Stop Pushbutton: Red or Black

12. Test Pushbutton: Black

13. Reset Pushbutton: Black

14. E-Stop Pushbutton: Red push-pull with mushroom

15. Overload Reset Pushbutton: Blue with White “R”

16. Selector Switch: Black with White Insert

E. Where a PLC or similar logic controller is used, provide a MODBUS/TCP communication module for connection to the plant SCADA.

F. As a minimum, data exchange shall include:

1. Equipment status (running, off, local/remote mode, PLC AUTO/PLC MANUAL mode).

2. Alarm/Fail condition of machine.

3. Operating modes.

4. Operating status values; discrete and analog.

5. All other data points required for the safe and reliable operation of the equipment.

G. Develop a data exchange table/map. Data table shall include:

1. For each data point, its name, register location, and tag number.

2. Group data by type; e.g., discrete inputs, discrete outputs, analog inputs, analog outputs.

DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 40 99 90-4 Salt Lake City New WRF – 524905398

H. Operator Interface Terminals:

1. Requirements:

a. Power: 24V dc.

b. Graphics: Color.

c. Minimum Size: 10 inches

d. Interface: Keypad and touchscreen.

e. Control strategies: Not permitted in Plant SCADA, OITs, or HMIs

f. Provide Run Time license, where applicable.

g. Communication: Ethernet.

h. Manufacturer and Product:

(1) As defined in the applicable packaged equipment specification

I. Network Cabling:

1. Provide interconnection cabling of all Ethernet devices internal to the panel.

Provide CAT6 shielded patch cables: factory made, ruggedized with a protective connector boot.

2. Interconnectivity cabling for the Ethernet network external to the panel will be provided by the installing Contractor.

2.03 INSTRUMENTATION:

A. Instrumentation supplied as part of a pre-manufactured system shall be the manufacturer’s standard equipment. Instruments shall be industrial grade and suitable for the conditions in which they will be installed.

B. Instrumentation shipped loose shall meet the requirements of the following sections:

1. Process gas analytical devices: Section 40 76 00

C. All instrumentation shipped loose shall be industrial grade and suitable for the conditions in which they will be installed.

2.04 EQUIPMENT IDENTIFICATION:

A. Identify electrical and automation equipment with nameplates.

1. Wording on nameplates to be approved by Engineer prior to manufacture.

DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 40 99 90-5 Salt Lake City New WRF – 524905398

2.05 PROGRAMMING TOOLS AND ACCESSORIES:

A. Provide the following as minimum:

1. Programming tools for each different type of programmable equipment:

a. Software program complete with interconnecting cable, signal converter, instruction manual and equipment documentation; or

b. Programming keypad and accessories.

2. Backup Copies of Application Software:

a. One copy for each unique version of software program or data.

b. Machine-readable backup software copy in the form of USB Memory Stick.

PART 3 - EXECUTION

3.01 SIGNAL CHARACTERISTICS:

A. Analog Signals:

1. 4 to 20 mA dc, in accordance with compatibility requirements of ISA S50.1.

2. Unless otherwise specified or shown, use Type 2, two-wire circuits.

3. Transmitters: Load resistance capability conforming to Class L.

4. Fully isolate input and output signals of transmitters and receivers.

B. Discrete Output Signals (from vendor panel perspective):

1. Two-state logic signals.

2. Provide voltage free contacts for 120VAC signals to the local plant PLC.

Minimum switching current to be lower than the PLC input current consumption.

3. Normal status signals shall be normally open, close to activate isolated contacts.

4. Fault signals shall be normally closed, open to activate isolated contacts.

C. Discrete Input Signals (from vendor panel perspective):

1. Two-state logic signals.

2. Provide interface for 120VAC wet signals from the plant SCADA.

DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 40 99 90-6 Salt Lake City New WRF – 524905398

3.02 ELECTRICAL POWER AND SIGNAL WIRING:

A. Restrain control and signal wiring in control panels by plastic ties or ducts. Secure hinge wiring at each end so bending or twisting will occur around the longitudinal axis of wire.

Protect bend area with a sleeve.

B. Arrange wiring neatly, cut to proper length, and remove surplus wire. Install abrasion protection for wire bundles passing through holes or across edges of sheet metal.

C. Use manufacturer’s recommended tool with sized anvil for crimp terminations. No more than one wire may be terminated in a single crimp lug. No more than two lugs may be installed on a single screw terminal.

D. Do not splice or tap wiring except at device terminals or terminal blocks.

E. All wires and cables inside the control panels shall be identified on both ends.

F. Route power cabling separate and spaced out (so that there is no derating factors applied to the cabling). Cable shall be routed to allow for maintenance of systems, and shall not impede access in the room or present obstructions.

3.03 STARTUP AND TESTING:

A. See system specification for startup and testing requirements.

3.04 FIELD TESTING:

A. Instruments and circuits shall be field tested and calibrated prior to commissioning.

3.05 TRAINING:

A. See system specification for startup and testing requirements.

END OF SECTION

Rev. 0 Gas and Liquid Purification Scrubbers DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 43 32 59-1 Salt Lake City New WRF - 524905449

SECTION 43 32 59

GAS AND LIQUID PURIFICATION SCRUBBERS

PART 1 - GENERAL

1.1 SCOPE

A. Furnish all labor, materials, equipment, and incidentals required for a fully functional Hydrogen Sulfide Removal System.

B. The Hydrogen Sulfide Removal System shall include the following Equipment/Sub-systems:

1. HYDROGEN SULFIDE REMOVAL SYSTEM

a. Hydrogen Sulfide Removal Media Vessels

b. Work platforms and ladders

c. Initial charge of pelletized media

d. Piping and valves

e. Instrumentation and controls (as necessary)

1.2 SYSTEM DESCRIPTION

A. The Hydrogen Sulfide Removal System will consist of a minimum Two (2) Hydrogen Sulfide Removal Vessels. System shall provide redundant vessel arrangement allowing continuous operation at rated capacity of the duty vessel during maintenance or media replacement of the out of service vessel.

B. The vessels contain a fixed bed media filter that remove hydrogen sulfide from the gas.

After the hydrogen sulfide removal process, the gas will be sent to the next stage of the conditioning process.

C. The vessels will be installed outside on a concrete pad (refer to Attachment A) and will be exposed to elements typical of a municipal wastewater treatment anaerobic digestion facility, direct sun, high heat and freezing conditions. The supplier shall include pertinent information regarding requirements and provisions typical of the high desert environment of Salt Lake City for installation of insulation and heat tracing (to be completed by others)

DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 43 32 59-2 Salt Lake City New WRF - 524905449

1.3 DESIGN REQUIREMENTS

A. The Hydrogen Sulfide Removal System shall be designed for continuous operation in an outdoor environment and shall conform to the following requirements:

1. SITE INFORMATION

a. Minimum Ambient Temperature 8°F

b. Maximum Ambient Temperature 100°F

c. Site Elevation 4,300’ AMSL

2. SYSTEM REQUIREMENTS

a. Minimum Gas Flow 300 scfm

b. Maximum Gas Flow 500 scfm

c. Average Gas Flow 400 scfm

3. INLET GAS CONDITIONS

a. Minimum Inlet Gas Pressure 8 in. WC

b. Maximum Inlet Gas Pressure 15 in. WC

c. Minimum Inlet Gas Temperature 65°F

d. Maximum Inlet Gas Temperature 100°F

e. Relative Humidity 100%

f. Average Hydrogen Sulfide (H2S) 200–400 ppmv

g. Peak Hydrogen Sulfide (H2S) 800 ppmv

4. DISCHARGE GAS REQUIREMENT

a. Maximum Hydrogen Sulfide ≤10 ppmv

1.4 SITE REQUIREMENTS

A. Electrical Classifications

1. NEC Class I, Division 1 Group D Areas

a. Hydrogen Sulfide Removal System

DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 43 32 59-3 Salt Lake City New WRF - 524905449

B. Equipment Mounting

1. Standalone

a. Hydrogen Sulfide Removal System

1.5 SUBMITTALS

A. General

1. Submit Shop Drawings and Product Data in sufficient detail to confirm compliance with requirements of this section and Section 01 33 00 SUBMITTALS. Submit Shop Drawings and Product Data in one complete submittal package. Partial submittals are unacceptable.

B. Product Drawings

1. Installation drawings and specifically prepared technical data, including design capacities. 3D model files suitable for design coordination (e.g., Revit, STEP, IFC, or approved equal) shall be provided.

2. Provide written principle of operation.

C. Product Data

1. Catalog cut sheets and product specifications for each product specified.

2. Anchorage design and product selection shall be provided with final submittals, including signed and sealed calculations by a Professional Engineer licensed in the State of Utah.

1.6 QUALITY ASSURANCE

A. Manufacturers Qualifications

1. Manufacturer is regularly engaged in the engineering, design and fabrication of Digester Gas Conditioning Systems of types and sizes required.

2. The Hydrogen Sulfide Removal System shall be produced and assembled under the direct supervision and quality control of the Manufacturer.

3. Products shall have been in similar digester gas service for a minimum of five (5) years with at least twenty (20) operational systems of comparable size and complexity.

4. Manufacturer shall provide a minimum of five (5) customer references for comparable systems installed within the previous five (5) years.

DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 43 32 59-4 Salt Lake City New WRF - 524905449

5. Vessels shall be designed and fabricated for the specified operating and maximum pressure conditions. Vessel design shall be supported by calculations signed by a Professional Engineer licensed in the United States. ASME Section VIII Division 1 construction is preferred, but not required.

6. Manufacturer must follow ASME B31.3 Process Piping Standards. Process welds shall be visually inspected and piping systems shall be pressure or leak tested prior to shipment. All stainless steel piping must be pickled and passivated.

Manufacturer must provide complete inspection reports for Engineer review upon request.

7. Manufacturer shall maintain a documented welding quality assurance program.

Welding inspection personnel shall be qualified for the work performed.

B. Factory Manufacturing/Assembly

1. Manufacturer shall maintain responsibility for quality control and system integration of all fabricated components.

C. Factory Testing

1. The assembled system shall undergo factory inspection and functional verification prior to shipment including leak testing of process piping.

1.7 REFERENCE STANDARDS

A. American National Standards Institute (ANSI)

1. ANSI B16.5 - Pipe Fittings and Flanged Fittings

B. American Society of Mechanical Engineers (ASME)

1. ASME B31.3 - Process Piping

2. ASME Section VIII, Division 1 - Pressure Vessels

C. Where reference is made to one of the above standards, the revision in effect at the time of bid opening shall apply.

D. Where a referenced document contains references to other standards, those documents are included as references under this Section as if referenced directly. In the case of conflict between the requirements of this Section and those listed in the documents, the requirements of this Section shall prevail.

DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 43 32 59-5 Salt Lake City New WRF - 524905449

1.8 SAFETY REQUIREMENTS

A. The Hydrogen Sulfide Removal System shall be furnished with adequate protective devices in reference to Occupational Safety and Health Act (OSHA) code requirements.

B. Use of mercury in gauges and thermometers is not permitted.

1.9 MAINTENANCE REQUIREMENTS

A. All replaceable parts shall be manufactured to definite standards for tolerance and finish in an order that any such part may be field installed without further machining or fitting.

All parts shall be permanently and legibly marked with original Manufacturer’s part number where practical. Parts or assemblies that require “fitting” for proper assembly shall be identified and separately listed in parts manual.

1.10 WARRANTY

A. The Hydrogen Sulfide Removal System shall be provided with a warranty that shall remain in effect until twenty-four (24) months after startup or thirty (30) months after delivery, whichever occurs first. The warranty shall cover defects in materials and workmanship. The warranty certificate shall be made available and signed by an officer of the Manufacturer’s company.

1.11 DELIVERY, STORAGE AND HANDLING

A. All pipe connections and openings shall be sealed prior to shipment.

B. Provide rigging and storage instructions.

C. Provide instructions for pieces of equipment that must be removed and/or unlocked before attempting to start the unit.

D. Supplier shall coordinate delivery with the Owner regarding timing, location and required storage location and conditions 14 days prior to anticipated delivery.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Acceptable Manufacturers

1. Martin Energy Group

2. MV Technologies

3. Unison Solutions, Inc

DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 43 32 59-6 Salt Lake City New WRF - 524905449

4. Varec Biogas

5. Or Equal

B. Bid Form requires the Vendor name to be listed.

2.2 GENERAL

A. All equipment shall not have been in service, except for shop tests, at any time prior to delivery.

B. All parts of equipment shall be amply proportioned for all regular stresses which occur during operation, fabrication, transportation, handling, and erection.

C. The equipment shall be factory assembled to the maximum extent possible. Field assembly is permissible if disassembly is required for safe transport.

2.3 HYDROGEN SULFIDE REMOVAL SYSTEM

A. Hydrogen Sulfide Removal Media Vessels

1. Quantity:

a. Minimum two (2) Vessels:

1) System shall provide a fully redundant vessel arrangement such that each vessel is independently capable of processing 100% of the specified design gas flow range, up to and including peak H2S loading conditions, while meeting the guaranteed maximum outlet H2S concentration, at all times when the other vessel is out of service for maintenance or media replacement.

2) The facility’s hydrogen sulfide removal function shall not be interrupted, degraded, or reduced in capacity by the out-of-service condition of either vessel.

2. Media vessel sizing shall be designed by Manufacturer to meet specified performance criteria.

3. Vessels shall be rated for not less than 2 psig internal pressure and 1 psig vacuum, regardless of normal operating pressure.

4. Materials of construction shall be corrosion-resistant stainless steel suitable for digester gas service (316 SS preferred). Other materials of construction, such as FRP, may be utilized for the media vessels provided all other design requirements are satisfied.

DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 43 32 59-7 Salt Lake City New WRF - 524905449

5. Suitable stainless steel structural supports with baseplate mounting designed for field installation.

6. 150# ANSI B16.5 side inlet and outlet connections.

7. Vessels shall include two adequately sized (30” min diameter) access manways for inspection and media replacement.

8. Internal supports and grating for media.

9. Pressure/vacuum relief protection shall be provided.

10. Two (2) top vent connections with stainless steel ball valves shall be provided for safe operation and maintenance.

11. Condensate drainage provisions shall be included with stainless steel ball valves

12. Piping and valves shall be provided by the Manufacturer in accordance with the technical specifications.

13. Instrumentation: Supplier shall provide all instrumentation necessary for safe operation, process control, and monitoring of the H2S removal system, including, at minimum:

a. Differential pressure indication across each vessel, with local readout and a 4-20 mA (or equivalent) output signal suitable for connection to the facility SCADA system.

b. Gas flow metering, supplied, installed, and calibrated by Supplier, to verify actual flow against the guaranteed design gas flow range.

c. All instrumentation shall be provided with signal outputs compatible with the facility SCADA system to support continuous operational monitoring and regulatory/permit reporting requirements. Supplier shall coordinate signal types, ranges, and communication protocol with the Owner prior to fabrication.

14. Inlet and outlet gas sampling ports on each vessel, sized and located to support field verification of guaranteed performance per Section 3.4.

B. Work Platform and Ladder

1. Platform shall be carbon steel, stainless steel, aluminum, FRP, or approved equal suitable for the application in accordance with the specifications.

DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 43 32 59-8 Salt Lake City New WRF - 524905449

2. Work platform shall be mounted to the top of the media vessels around the top manway. Work platform shall be in accordance with the technical specifications and shall include railing and self-closing safety gate.

3. Ladder shall be aluminum, stainless steel, FRP, or approved equal suitable for outdoor digester gas service and in accordance with the technical specifications.

C. Initial Charge of Pelletized Media

1. Manufacturer shall furnish an initial charge of pelletized media sized to meet the specified performance requirements.

2. Media to be loaded into Hydrogen Sulfide Removal Vessels by Installation Contractor.

D. Ancillary Systems

1. Manufacturer shall furnish all ancillary components necessary for a complete and operable system, including valves, instrumentation, supports, sampling ports, and controls required for normal operation and in accordance with the technical specifications.

2.4 PIPING

A. Pipe shall be SA-312 TP316/316 Weld Pipe, minimum Schedule 10S. Threaded pipe shall be minimum Schedule 40S.

B. Flange connections shall be ANSI B16.5, SA-182 F316/316 Class 150.

C. Pipe welding shall follow ASME B31.3 Process Piping. Welded pipe shall be visually inspected and pressure tested.

D. All stainless steel vessels and piping shall be pickled and passivated after welding, prior to assembly. Manufacturer shall supply all applicable piping gaskets, suitable for the service and field-assembly at the site.

E. Reference Division 40 technical specifications for piping requirements.

2.5 VALVES

A. Ball Valves

1. Acceptable Manufacturers

a. Apollo

b. Sharpe

DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 43 32 59-9 Salt Lake City New WRF - 524905449

c. Or Equal

2. Shall be stainless steel with PTFE or RTFE seat.

3. Valves shall be full port.

4. Reference Section 40 23 13.01 PROCESS VALVES AND APPURTENANCES for complete specifications.

B. Butterfly Valves

1. Acceptable Manufacturers

a. Dezurik

b. Bray

c. Keystone

d. Or Equal

2. All butterfly valves used for the system shall be double offset, high-performance valves. Valve bodies shall be constructed of 316 Stainless Steel ASTM A351 Grade CF8M. The valve body shall be cast lugged or wafer configurations with a minimum of four guide holes. Body and trim shall include extended neck to allow for 2” piping insulation.

3. Reference Section 40 05 64 BUTTERFLY VALVES for complete specifications.

2.6 FASTENERS

A. Fasteners shall be 316 stainless steel.

PART 3 - EXECUTION

3.1 FACTORY EQUIPMENT TESTING

A. Media vessels and associated process piping shall be leak tested at the Manufacturer’s facility using hydrostatic, pneumatic, or equivalent approved methods.

B. The assembled Hydrogen Sulfide Removal System shall undergo factory inspection prior to shipment to verify:

1. Proper fabrication and assembly.

2. Completion of required piping and valve installation.

DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 43 32 59-10 Salt Lake City New WRF - 524905449

3. Functional operation of provided instrumentation.

4. Completion of required quality assurance inspections.

C. Factory test and inspection records shall be made available to the Engineer upon request.

3.2 INSTALLATION

A. The Hydrogen Sulfide Removal System shall be installed in accordance with the Manufacturer’s written instructions and approved submittals.

B. Installation Contractor responsibilities shall include, but not be limited to:

1. Furnishing all foundations, housekeeping pads, and supports as required.

2. Rigging, unloading, and setting of equipment.

3. Furnishing anchor bolts and installation hardware not provided by the Manufacturer.

4. Installation of field piping between Equipment/Sub-systems.

5. Installation of shipped-loose components and accessories.

6. Loading of initial media into the vessels in accordance with Manufacturer’s recommendations.

7. Provision of heat tracing, insulation, or freeze protection measures where required by Manufacturer or Engineer.

8. Proper storage and protection of equipment and media prior to installation.

C. As-built drawings and equipment interconnection requirements shall be provided with the equipment shipment.

3.3 FIELD START-UP SERVICES

A. Manufacturer shall provide the services of one (1) qualified technician for a minimum of two (2) consecutive 8-hour workdays for onsite startup, performance testing, and operator training.

B. Field startup services shall include:

1. Inspection of installation for conformance with Manufacturer’s recommendations.

2. Assistance with system startup and operational checks.

3. Verification of instrumentation functionality.

DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 43 32 59-11 Salt Lake City New WRF - 524905449

4. Confirmation of proper valve arrangement and gas flow path.

5. Operator instruction for:

a. Normal operation

b. Media replacement procedures

c. Routine inspection and maintenance

d. Troubleshooting recommendations

C. Manufacturer shall provide written startup documentation and operational recommendations.

3.4 FUNCTIONAL VERIFICATION

A. Following startup, the Hydrogen Sulfide Removal System shall be placed into operation and verified for proper functionality.

B. Functional verification shall include the confirmation of:

1. Proper vessel operation.

2. Proper valve functionality and switching capability.

3. Leak-free piping and vessel connections.

4. Instrumentation operation.

5. Availability of inlet and outlet gas sampling provisions.

C. Hydrogen sulfide removal performance shall be demonstrated through field gas sampling confirming compliance with the specified outlet hydrogen sulfide concentration requirement of ≤10 ppmv, under actual operating conditions.

D. Sampling methodology and test duration shall be coordinated between Manufacturer, Owner and Engineer.

3.5 ACCEPTANCE

A. Final acceptance shall occur upon:

1. Completion of startup services.

2. Correction of identified deficiencies.

3. Submission of required documentation.

DCU Gas Purification Scrubbers Equipment Pre-Purchase Section 43 32 59-12 Salt Lake City New WRF - 524905449

4. Demonstration of compliance with specified performance requirements.

B. If the Hydrogen Sulfide Removal System fails to meet the specified performance requirements, the Manufacturer shall make necessary corrections or modifications at no additional cost to the Owner.

C. Final acceptance shall be determined by the Engineer.

END OF SECTION

Addendum_01_16JULY2026_Digester Complex Upgrades (524905449) Final Audit Report 2026-07-16

Created: 2026-07-16

By: Valeri Kenyon (Valeri.Kenyon@slc.gov)

Status: Signed

Transaction ID: CBJCHBCAABAA2bnBeTlHLr2YN-6RJawtVudZ2xYOL1yq

"Addendum_01_16JULY2026_Digester Complex Upgrades (524 905449)" History

Document created by Valeri Kenyon (Valeri.Kenyon@slc.gov)

2026-07-16 - 8:29:25 PM GMT

Document emailed to Jason Brown (jason.brown@slc.gov) for signature

2026-07-16 - 8:30:42 PM GMT

Email viewed by Jason Brown (jason.brown@slc.gov)

2026-07-16 - 9:20:27 PM GMT

Document e-signed by Jason Brown (jason.brown@slc.gov) Signature Date: 2026-07-16 - 9:22:11 PM GMT - Time Source: server- Signature captured from device with phone number XXXXXXX0735 - Signature Appearance Selected: MOBILE_DRAW

Agreement completed.

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