WES_Tri-City_AB_Improvements_Final_Specifications.pdf

PDF 6 MB Posted Oct 7, 2026

Attached to: BID 2026-78 Tri-City Water Resource Recovery Facility (WRRF) Aeration Basin Improvements
Solicitation number: S-C01010-00018145
Issued by: Oregon

About this file

Written by GovTribe AI · Oct 8, 2026

This document is a Final Specifications file for Clackamas Water Environment Services (WES) in Oregon City, Oregon, detailing contract documents for the construction of Tri-City Water Resource Recovery Facility (WRRF) Aeration Basin Improvements, Project No. 700224304. The project involves comprehensive modifications and improvements to existing aeration basin facilities conducted over two summer shut-down seasons, with Phase 1 (Aeration Basins 1 and 2) scheduled for substantial completion by September 30, 2027, and Phase 2 (Aeration Basins 3 and 4) by September 30, 2028. The scope of work includes cleaning aeration basins and channels; reconfiguring and replacing air lift piping (ALP) and high-pressure air piping (AHP) systems; replacing flow control valves, pneumatic actuators, and manual isolation butterfly valves across all four basins; refurbishing basin influent slide gates and effluent channel gates; installing new dissolved oxygen probes and thermal mass flow transmitters; demolishing two polymer tanks; installing new control panels and remote I/O panels; and performing comprehensive concrete repairs including crack sealing, joint resealing, and structural rehabilitation. The contractor must maintain continuous operation of the existing wastewater treatment facilities throughout construction, with maximum outage periods strictly limited: all aeration basins must remain in service from October 1 to May 31 annually, work requiring basin outages must occur between June 1 and September 30, a maximum of two basins may be offline simultaneously, air flow interruptions cannot exceed 30 minutes, and manual blower operation cannot exceed 8 hours per day during Owner operations personnel presence.

The specifications establish stringent sequencing constraints and coordination requirements to minimize disruption to plant operations and ensure compliance with NPDES permit requirements, including detailed facility operations procedures, removal from service protocols requiring minimum two-week advance written notice with documented plans, and phased commissioning aligned with Functional Testing requirements divided into two parts per phase. Contractor responsibilities include providing temporary pumps and services to transfer mixed liquor within 8-hour periods, erosion control measures, site staging and security, temporary power plans, and pre-construction videotape surveys and documentation of existing conditions. The contract requires electronic submittal of all documents through an Owner-provided electronic document management system (EDMS) similar to Procore, with submittals subject to 30-day review periods and formatted as PDF files with electronic bookmarking for documents exceeding 10 pages. Engineer programming of Process Instrumentation and Control Subsystem (PICS) software is anticipated with a minimum 60-day allowance prior to PLC installation, and the contract includes provisions for phased facility integration and performance testing, with participation in multiple scheduled meetings including preconstruction conferences, weekly progress meetings, quality control meetings, PICS coordination meetings, and facility startup meetings beginning two months prior to equipment startup.

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WES_Tri-City_AB_Improvements_Final_Drawings.pdf	PDF	Oct 7, 2026
BID 2026-78 Tri City WRRF Aeration Basin Improvements Final 10.7.pdf	PDF	Oct 7, 2026

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CLACKAMAS WATER ENVIRONMENT SERVICES

OREGON CITY, OREGON

CONTRACT DOCUMENTS

for the construction of the

TRI-CITY WRRF AERATION BASIN IMPROVEMENTS

WES Project No. 700224304

JACOBS

Corvallis, Oregon

September 2026

This document and the ideas and designs incorporated herein, as an instrument of professional service, is the property of Jacobs and is not to be used in whole or part, for any other project without the written authorization of Jacobs. Any reuse, modification, or alteration of this document and the ideas and designs incorporated herein is at the sole risk of the party(ies) reusing, modifying, or altering it. All references to Jacobs and its employees and all professional seals shall be removed prior to any reuse, modification, or alteration of this document.

Project No. D3900000 Copy No.

TRI-CITY WRRF AERATION BASIN IMPROVEMENTS

PW\JAWATER-001\D3900000\30 SEALS PAGE

SEPTEMBER 2026 00 01 07 - 1

SECTION 00 01 07

SEALS PAGES

See Table of Contents for author of each specification section, identified by author’s initials as follows:

AUTHOR’S NAME = INITIALS

ALEX LANE FIRTH = ALF ERIK JON THOMPSON = EJT

JACOB HELLEN = JH DONALD PAUL WATSON = DPW

BARRY R. REICHELDERFER = BRR

SPECIFICATIONS

Digitally Signed on

September 9, 2026

Alex L. Firth

SEALS PAGE PW\JAWATER-001\D3900000\30

00 01 07 - 2 SEPTEMBER 2026

SPECIFICATIONS

Digitally Signed on

Jacob Hellen

SEPTEMBER 2026 00 01 07 - 3

SPECIFICATIONS

Digitally Signed on

Barry R. Reichelderfer

SEALS PAGE PW\JAWATER-001\D3900000\30

00 01 07 - 4 SEPTEMBER 2026

SPECIFICATIONS

Digitally Signed on

Erik Jon Thompson

SEPTEMBER 2026 00 01 07 - 5

SPECIFICATIONS

Digitally Signed on

September 9, 2026

Donald Paul Watson

END OF SECTION

PW\JAWATER-001\D3900000\30 TABLE OF CONTENTS

SEPTEMBER 2026 00 01 10 - 1

TABLE OF CONTENTS

Person Section Responsible Title Pages

PART 1—SPECIFICATIONS

DIVISION 01—GENERAL REQUIREMENTS

01 11 00 BRR Summary of Work.................................................................... 1- 5 01 31 13 BRR Project Coordination ................................................................ 1- 20 01 31 19 BRR Project Meetings ...................................................................... 1- 4 01 32 00 BRR Construction Progress Documentation .................................... 1- 8 01 33 00 BRR Submittal Procedures ............................................................... 1- 9 01 42 13 BRR Abbreviations and Acronyms .................................................. 1- 5 01 43 33 BRR Manufacturers’ Field Services ................................................. 1- 4

Supplement:

BRR Manufacturer’s Certificate of Proper Installation .................... 1- 1

01 45 16.13 BRR Contractor Quality Control ...................................................... 1- 9 01 50 00 BRR Temporary Facilities and Controls ........................................... 1- 14 01 61 00 BRR Common Product Requirements .............................................. 1- 8

Supplement:

BRR Manufacturer’s Certificate of Compliance .............................. 1- 1

01 77 00 BRR Closeout Procedures ................................................................. 1- 4 01 78 23 BRR Operation and Maintenance Data ............................................. 1- 9

Supplements:

BRR Maintenance Summary Form ................................................... 1- 2 BRR Equipment Inventory Template ............................................... 1- 1

01 88 15 BRR Anchorage and Bracing ............................................................ 1- 6 01 91 14 BRR Equipment Testing and Facility Startup .................................. 1- 13

Supplements:

BRR Unit Process Startup Form ....................................................... 1- 1 BRR Facility Performance Demonstration/Certification Form ........ 1- 1

DIVISION 02—EXISTING CONDITIONS

02 41 00 EJT Demolition ............................................................................... 1- 8

DIVISION 03—CONCRETE

03 01 32 ALF Repair of Vertical and Overhead Concrete Surfaces ............... 1- 11 03 64 24 ALF Polyurethane Injection Grouting .............................................. 1- 8

Person Section Responsible Title Pages

TABLE OF CONTENTS PW\JAWATER-001\D3900000\30

00 01 10 - 2 SEPTEMBER 2026

DIVISION 04 THROUGH DIVISION 08—NOT USED

DIVISION 09—FINISHES

09 90 00 EJT Painting and Coating ................................................................ 1- 21 Supplements:

EJT Paint System Data Sheet (PSDS) ............................................. 1- 1 EJT Paint Product Data Sheet (PPDS) ............................................ 1- 1

DIVISION 10—SPECIALTIES

10 14 00 EJT Signage ..................................................................................... 1- 5

DIVISION 11 THROUGH DIVISION 25—NOT USED

DIVISION 26—ELECTRICAL

26 05 01 JH Electrical .................................................................................. 1- 24

DIVISION 27 THROUGH DIVISION 34—NOT USED

DIVISION 35—WATERWAY AND MARINE CONSTRUCTION

35 20 16.26 EJT Fabricated Slide Gates ............................................................. 1- 4

DIVISIONS 36 THROUGH DIVISION 39—NOT USED

DIVISION 40—PROCESS INTERCONNECTIONS

40 05 15 EJT Piping Support Systems ........................................................... 1- 11 40 27 00 EJT Process Piping—General ......................................................... 1- 20 40 27 00.01 EJT Cement-Mortar-Lined Ductile Iron Pipe and Fittings

Data Sheet ............................................................................. 1- 3 40 27 00.03 EJT Carbon Steel Pipe and Fittings—General Service

Data Sheet ............................................................................. 1- 5 40 27 00.08 EJT Stainless Steel Pipe and Fittings—General Service

Data Sheet ............................................................................. 1- 3 40 27 00.13 EJT Copper and Copper Alloy Pipe, Tubing, and Fittings

Data Sheet ............................................................................. 1- 1 40 27 00.20 EJT Stainless Steel Pipe and Fittings—Thin Wall Data Sheet ....... 1- 2 40 27 02 EJT Process Valves and Operators .................................................. 1- 18

Person Section Responsible Title Pages

PW\JAWATER-001\D3900000\30 TABLE OF CONTENTS

SEPTEMBER 2026 00 01 10 - 3

40 42 13 EJT Process Piping Insulation ......................................................... 1- 6 Supplement:

EJT Service and Insulation Thickness Table .................................. 1- 1 40 80 01 EJT Process Piping Leakage Testing .............................................. 1- 7 40 90 00 DPW Instrumentation and Control for Process Systems ................... 1- 40

Supplements:

DPW Control Loop Descriptions ....................................................... 1- 15 DPW Control Panel Schedule ............................................................ 1- 1 DPW Instrument List ......................................................................... 1- 4 DPW PLC Input/Output List ............................................................. 1- 5 DPW PLC Equipment List ................................................................ 1- 1 DPW Preparation for Testing and Functional Test Forms ................ 1- 3 DPW Performance Test Sheet ........................................................... 1- 1

40 91 00 DPW Instrumentation and Control Components ............................... 1- 22 40 95 80 DPW Fiber Optic Communication System ........................................ 1- 18

DIVISION 41 THROUGH DIVISION 49—NOT USED

PART 2—DRAWINGS (BOUND SEPARATELY)

PART 1

SPECIFICATIONS

PW\JAWATER-001\D3900000\30 SUMMARY OF WORK

SEPTEMBER 2026 01 11 00 - 1

SECTION 01 11 00

SUMMARY OF WORK

PART 1 GENERAL

1.01 WORK COVERED BY CONTRACT DOCUMENTS

A. The completed Work will provide Owner with modifications and improvements to existing facilities as follows:

1. Prior to each Phase of this Project requiring access to or work within an Aeration Basin or associated channel the Owner will take offline a pair of interlock Basins, Influent and Effluent channels and drain these areas, at which point the offline areas will be turned over to the Contractor for the season’s work activities directly related to these areas There are two main Phases for this Project to take place over two summer shut-down seasons.

2. Cleaning: Once the Owner has taken offline, drained and turned over to the Contractor an area of work for the season, the Contractor shall completely clean all aeration basins, influent channels, side and end effluent channels which have been drained. Cleaning activities to include pressure wash clean, removal of all moss, vegetation, debris, sludge, etc.

3. Aeration Basins:

a. ALP Piping:

1) In Aeration Basin 1 (AB1), AB2, AB3, and AB4, reconfigure and replace ALP piping sections containing the flow transmitters and control valves in Aeration Zones 2-5.

Add piping to incorporate control valve and flow transmitter to Aeration Zone 2. This piping is to be elevated from its current position so that control valves and flow transmitters are over the deck and be easily accessed. The final configuration will result with each of the four basins having four fully automated aeration zones.

2) Replace diffuser membranes in AB1, AB3, and AB4 to match the previously replaced diffuser membranes in AB2.

(Contractor to replace damaged diffusers with Owner provided replacements).

b. AHP Piping:

1) Extend the AHP piping for Aeration Basins AB1, AB2, AB3, and AB4 to supply high pressure air to the new Zone 2 pneumatic flow control valves.

SUMMARY OF WORK PW\JAWATER-001\D3900000\30

01 11 00 - 2 SEPTEMBER 2026

2) Tie into and extend the existing AHP line(s) to provide high-pressure air supply to the ACP panel(s), for instrument cleaning, on basins AB1, AB2, AB3, and AB4.

3) Install new stainless steel tubing between each basin’s ACP and its four associated dissolved oxygen (DO) probes to provide dedicated air lines for cleaning service.

c. Valves:

1) Replace AB1, AB2, AB3, and AB4 Aeration Zone 3, Zone 4, and Zone 5, flow control valves and pneumatic actuators. Add new flow control valve and actuator to Zone 2 in all four basins. And replace manual isolation butterfly valves on each ALP control valve manifold for Zone 2, Zone 3, Zone 4 and Zone 5 for all (four) basins.

2) Replace Isolation Valves to the inlets of conventional activated sludge (CAS) AB1-2 and (CAS) AB3-4 Dewatering Pumps. 10-inch manual valves accessed through floor grating in Gallery. Four valves in total.

3) Inspect and recondition AB1 butterfly valve in weir wall to restore smooth linear function. (36-inch valve tag 560-32-001).

4) W5 - Flush Water System: Replace all valves, and lubricate remote manual actuator, confirm smooth linear operation, if remote operator does not functional in a smooth linear manor, and requires additional replacement or repair report actions require to correct to Owner, 10 per basin in all four basins.

5) Replace ALP butterfly isolation valves for effluent channel ALP bubbles (not currently used) at the west end of the aeration basins, along with the effluent channel ALP header isolation valve. One 8-imch butterfly and four 6-inch butterfly valves.

6) Replace the mud valve located at the effluent channel feeding the two metering flumes going to the clarifiers.

(Located west of end of Basin 3 near Parshall flumes.)

7) Replace four 16 inches RAS discharge control valve actuators (pneumatic actuators only not the valves), in gallery.

8) Replace four 16-inch leaking manual RAS isolation valves in gallery with new full bonnet knife gate valves.

9) Replace two RAS pump header inlet control valve actuators (actuators only not valves), RAS Pump Building basement.

(20-inch butterfly valves with pneumatic actuators).

SEPTEMBER 2026 01 11 00 - 3

10) Remove four abandoned (locked open) 16-inch ALP flow control butterfly valves located in east end of gallery, and fill the gap left in the ALP piping with a spacer spool, repair or replace insulation damaged from the valve removal.

d. Gates:

1) Repair and reseal ML Flume No. 1 and No. 2 Effluent

Gates. (These gates are downstream of the Parshall flumes to isolate flow to secondary clarifiers 1 and 2. Gate 1 is currently leaking at the bottom).

2) Refurbish basin influent slide gates, replace seals and resurface slide gates on all four aeration basins. (Each basin has four 24-inch by 24-inch gates and eleven 12-inch by 12-inch gates. Gates at the ends of the basins are reverse acting).

e. Aeration Basin Structures:

1) Repair AB1, AB2, AB3, and AB4 basin structures including the following:

a) Repair of cracks.

b) Cleaning and resealing of expansion joints (including addressing leakage into RAS building and pipe galleries).

c) Removal of organic debris from surfaces of the effluent channel.

d) Securing end supports of the walkway bridges.

e) Filling gaps in the walkways to ensure a safe walking surface.

f) Pressure washing of the entire basins.

2) This item does not include full refurbishment of the concrete surfaces within the basins to address concrete carbonation.

3) Install access hatches in all four aeration basins from the RAS pump station. Construction of hatches shall be a separate bid item in the Project bid package.

4) Remove all weir/cover plates between the aeration basins and the effluent channels, ten slots (5 feet long by 1 foot tall) per basin with cover plates located on both sides of the slots in some cases. Replace weir/cover plates with full stainless steel cover plates on the effluent channel side.

5) Provide and install Davit Crane base plates one per basin and modify handrail at Davit Crane location.

SUMMARY OF WORK PW\JAWATER-001\D3900000\30

01 11 00 - 4 SEPTEMBER 2026

f. Instrumentation and Controls:

1) Demolish AB1, AB2, AB3, and AB4 Aeration Zone 3, Zone 4, and Zone 5, existing flow indicating transmitters and sensors. Furnish and install new thermal mass flow transmitters with flow conditioner in the AB1, AB2, AB3, and AB4 Aeration Zone 2, Zone 3, Zone 4, and Zone 5 ALP piping.

2) Demolish AB1, AB2, AB3, and AB4 Aeration Zone 3, Zone 4, and Zone 5, Dissolved Oxygen (DO)Transmitters.

Furnish and install new DO Probes and mounting hardware at AB1, AB2, AB3, and AB4 Aeration Zone 2, Zone 3, Zone 4, and Zone 5.

3) Furnish and install level type flow meters at the two existing Parshall flumes.

4) Furnish and install new PLC panel CP-3B in MCC6 Room above the RAS pump station sized to handle future cutover of existing PLC-3A Remote I/O drops.

5) Furnish and install two remote I/O panels on the Aeration Basin deck, one located between Aeration Basins AB1 and AB2, and one located between Aeration Basins AB3 and AB4. Panels shall serve to reduce instrument cable lengths and provide local I/O termination points for basin instrumentation.

6) Furnish and install remote I/O panel in the RAS Gallery.

Panel serves to reduce instrument cable lengths and provide local I/O termination points for RAS flow control valves.

7) Demolish existing basin panel LCP-3214 after panel is no longer in use.

8) Furnish and install four new Analyzer Control Panels, one each for Aeration Basins AB1, AB2, AB3, and AB4. Panels shall house the dissolved oxygen (DO) transmitters, air cleaning assemblies.

9) Assist with startup activities as defined in Section 40 90 00, Instrumentation and Control for Process Systems.

g. Other Work:

1) Clean four side effluent channels, each adjacent to an aeration basin.

2) Demolish the two polymer tanks located west of AB3 and

AB4. Mixers to be salvaged and returned to the Owner.

3) Relocate hose station in gallery at west end of Basin 4 to make room to add the submarine hatch to the basin wall.

4) Specify demolition work to remove out of service control boxes and other equipment no longer in use.

5) Install new 480V-120V/208V transformer, new 120V/208V electrical panel, wiring, and conduit.

SEPTEMBER 2026 01 11 00 - 5

h. SCADA: Furnish and install fiber optic and copper network cabling between CP-3A, CP-3B, CP-3B-RIO-1, CP-3B-RIO-2, CP-3B-RIO-3, and existing basin mixers, as noted in the network design.

1.02 WORK NOT COVERED BY CONTRACT DOCUMENTS

A. As shown on the Drawings.

1.03 PROVISIONS FOR FUTURE WORK

A. Provisions for future construction are as shown on the Drawings.

PART 2 PRODUCTS (NOT USED)

PART 3 EXECUTION (NOT USED)

PW\JAWATER-001\D3900000\30 PROJECT COORDINATION

SEPTEMBER 2026 01 31 13 - 1

SECTION 01 31 13

PROJECT COORDINATION

PART 1 GENERAL

1.01 SUMMARY

A. The intent of this section is to provide a sequence to perform the Work in such a manner that continuous, uninterrupted plant treatment processes and all essential plant services and facilities are maintained operational throughout the construction period.

1.02 SUBMITTALS

A. Informational:

1. A complete set of all photographs and survey data of the post-construction conditions shall be completed and submitted prior to final inspection by the Owner and Engineer.

2. Removal from Service Requests.

3. Schedule and hold Work Sequence Plan coordination meeting with the

Owner and Engineer within 10 business days of the submittal of the Work Sequence Plan, before any work activity starts.

4. Temporary Power Plans.

5. Work Sequence Plan: Submit within 30 days of Notice to Proceed.

6. Videotape survey, photographs, and other data of the preconstruction conditions shall be submitted to the Engineer for record purposes prior to, but not more than 3 weeks before, commencement of any construction activities.

1.03 RELATED WORK AT SITE

A. General:

1. Other work that is either directly or indirectly related to scheduled performance of the Work under these Contract Documents, listed henceforth, is anticipated to be performed at Site by others.

2. Coordinate the Work of these Contract Documents with work of others as specified in General Conditions.

3. Include sequencing constraints specified herein as a part of Progress Schedule.

PROJECT COORDINATION PW\JAWATER-001\D3900000\30

01 31 13 - 2 SEPTEMBER 2026

B. Applications Software Development:

1. Engineer will perform programming of applications software for certain portions of Process Instrumentation and Control Subsystem (PICS).

Refer to Section 40 90 00, Instrumentation and Control for Process Systems, for detailed information pertaining to Engineer programming.

a. Sequencing: Include sequencing constraints specified herein as part of Progress Schedule.

b. Key activity for scheduling and coordination is the installation of the PLC panel CP-3-B in the Electrical Room above the RAS pump station. Allow a minimum of 60 days prior to scheduled PLC installation for Engineer software development using the PLC CPU. Include this activity in the Project Schedule.

2. Following Contractor completion of Functional Test Part 1, specified in Section 40 90 00, Instrumentation and Control for Process Systems, allow 10 working days for Functional Test Part 2 for each PLC area.

a. When applications software testing is delayed because of altered equipment interfaces, receipt of incorrect Shop Drawing information, failed equipment, or incomplete Functional Test Part 1 testing, duration of delay will be excluded from interruption allowance, unless notified otherwise by Engineer and Owner.

1.04 UTILITY NOTIFICATION AND COORDINATION

A. Coordinate the Work with various utilities within Project limits. Notify applicable utilities prior to commencing Work, if damage occurs, or if conflicts or emergencies arise during the Work.

1. Clackamas County Sheriff: (503) 655-8218.

2. Water Environment Services: (503) 742-4567.

3. Portland General Electric: (503) 228-6322.

4. Comcast: (800) 266-2278.

5. NW Natural: (503) 226-4211.

6. Oregon Utility Notification Center: (800) 332-2344.

SEPTEMBER 2026 01 31 13 - 3

1.05 PROJECT MILESTONES

A. Project Milestones:

1. Generally described in the Agreement Form. Following is a detailed description of each:

No. Milestone

Substantial Completion (Date or Calendar Days from Notice to Proceed)

Substantial Completion and Return to Service Aeration Basin 1 and 2 Improvements.

September 30, 2027

Substantial Completion and Return to Service Aeration Basin 3 and 4 Improvements, and Clarifier Interface scope.

September 30, 2028

Substantial Completion of Entire Contract

As specified in the Agreement

Final Completion of Entire Contract

As specified in the Agreement

1.06 EXISTING TREATMENT PLANT

A. The Work shall be executed while the existing wastewater treatment facilities are in operation. Operation of the existing facility shall not be jeopardized nor shall the efficiency or volume of wastewater conveyance be reduced as a result of the execution of the Work. Impairing the operational capabilities of the treatment plant will result in serious environmental damage and monetary fines. Conduct work in a manner that will not impair the operational capabilities of essential elements of the treatment process or reduce the capacity of the entire treatment plant below levels sufficient to treat the quality of raw wastewater to the water quality limitations specified in the discharge permit. Contractor shall be responsible for fines or other monetary damages that are a direct result of Contractor’s failure to complete work in a timely fashion or other deficiencies that result in permit violations or measures to mitigate operational impacts to existing treatment plant operations. The status of the treatment plant shall be defined as “operational” when it is capable of treating the entire quantity of wastewater received to the water quality limits specified in the discharge permit.

01 31 13 - 4 SEPTEMBER 2026

B. The construction sequence and constraints in this section do not include all items affecting the completion of the Work but are intended to describe the sequence of critical events and associated constraints necessary to minimize disruption of the ongoing treatment plant processes and to ensure compliance with NPDES Permit requirements. It shall be understood and agreed by the Contractor that the critical events described are not all inclusive and that additional items of work not included may be required to minimize disruption and ensure compliance. Deviation from or modification of the suggested sequence is permitted if techniques and methods known to the Contractor will result in reducing disruption to the facility operation and maintaining treatment efficiency, avoiding violation of scheduling constraints, and if deviation is approved in advance by the Engineer.

C. Maintain traffic on existing roads as specified in Section 01 50 00, Temporary Facilities and Controls.

1.07 GENERAL WORK SEQUENCING CONSTRAINTS

A. For the purposes of this Article General Work Sequencing Constraints, and the following Article Facility Operations and Work Sequence, terms, such as “…work…must be completed” and “…completed and in operation”, and “…in successful operation” are defined as meeting the terms of “Substantial Completion” and “Partial Substantial Completion” as defined in the General Conditions and Supplementary Conditions.

B. Include the following work sequencing constraints in the Progress Schedule:

1. All aeration basins must remain in service from the period October 1 to May 31 annually.

2. Work requiring aeration basins to be out of service shall occur between June 1 and September 30 annually.

3. A maximum of two aeration basins and associated channels (Aeration Basin 1 and Basin 2 (set) or Aeration Basin 3 and Basin 4 (set)) may be out of service at a time during the period between June 1 and September 30 annually. In the case of the effluent channels some additional coordination may be required with the owner to keep the Aeration process operational while also allowing the contractor dry access to channel gates needing refurbishment and the install of new flow measurement instruments.

4. ALP and AHP Air flow to in-service aeration basins shall not be interrupted for a period longer than 30 minutes.

SEPTEMBER 2026 01 31 13 - 5

5. Manual operation of blowers providing air flow to in-service aeration basins shall not exceed a period of 8 hours. Periods of manual operation shall be scheduled for times when Owner’s Operations Personnel are present during their day shift (typically 6:00 a.m. to 3:00 p.m., coordinate with operations).

6. Provide temporary pumps and size pump(s) to transfer mixed liquor to or from an Aeration Basin to remove or return it to service within an 8-hour period. Wash down and clean the aeration basins and associated equipment as necessary to complete Work. Coordinate with Owner personnel on removal of aeration basins from service and return to service.

7. More detailed constraints are given in Article Facility Operations and Work Sequence below.

8. Software Functional Testing and Phased Facility Integration:

a. Software Functional Testing (FT) of the Programmable Logic

Controller (PLC) software shall be conducted in accordance with Section 40 90 00, Instrumentation and Control for Process Systems, and Section 01 91 14, Equipment Testing and Facility Startup. Functional Testing is divided into two parts (FT Part 1 and FT Part 2) and shall be completed in alignment with the phased construction and commissioning of the Aeration Basin improvements.

b. The Project shall be commissioned in two major phases that align with Project Milestones. Each phase shall be treated as a standalone functional area for the purposes of PLC integration, functional testing, and return to service:

1) Phase 1: Aeration Basin 1 and Basin 2 Improvements.

2) Phase 2: Aeration Basins 3 and Basin 4 Improvements, and

Clarifier Interface.

c. FT Part 1 is performed by Contractor or PIC System Integrator without the PLC software. FT1 shall be completed per phase, covering all new equipment, instrumentation, wiring, and PLC I/O associated with the Aeration Basins included in that phase.

Confirm readiness of field devices, panels, terminations, communications, and PLC hardware.

d. FT Part 2 can only commence after FT Part 1 is complete (per phase). FT Part 2 is performed by the Contractor or PIC System Integrator, as well as the Engineer with the PLC software.

01 31 13 - 6 SEPTEMBER 2026

1.08 FACILITY OPERATIONS AND WORK SEQUENCE

A. Continuous operation of Owner’s facilities is of critical importance. Schedule and conduct activities to enable existing facilities to operate continuously, unless otherwise specified.

B. Perform Work continuously during critical connections and changeovers, and as required to prevent interruption of Owner’s operations.

C. Provide safe access to Owner’s existing facilities, including access for:

1. Biosolids trucks.

2. Chemical deliveries (including lime, polymer, hypochlorite, and bisulfite).

3. Fuel deliveries for generator re-fueling.

4. Garbage pickup.

5. Other construction activities.

D. When necessary, plan, design, and provide various temporary services, utilities, connections, temporary piping and heating, access, and similar items to maintain continuous operations of Owner’s facility.

E. Do not close pipes, OPEN or CLOSE valves, or take other action which would affect the operation of existing systems, except as specifically required by the Contract Documents and after authorization by Owner and Engineer.

Such authorization will be considered within 48 hours after receipt of Contractor’s written request.

F. Work Sequence:

1. To meet the overall objectives of the Project, certain tasks and task elements should be generally performed, completed, or substantially completed in the herein-specified sequences. However, two or more of the tasks or task elements may be pursued simultaneously when consistent with the requirements specified herein; the requirements of Article Project Milestones, Article General Work Sequencing Constraints, Removal from Service (RFS) and Facility Shutdown, and the Project Schedule.

2. The specified sequences and tasks are not all-inclusive. They are intended to convey overall constraints and suggested construction sequences. The Contractor shall plan the Work, relocate facilities, reroute utilities, and provide for temporary connections and terminations as necessary in an appropriate sequence of operation to perform the Work, while minimizing interferences with and providing for continuous operation of the Owner’s existing wastewater facilities.

SEPTEMBER 2026 01 31 13 - 7

3. Task headings and descriptions set forth below are descriptive only and are not intended to define the scope of Work included therein.

4. Major tasks and sequences have been identified for the Owner’s purposes. Although all Work is not listed herein, the tasks listed shall be understood to include all accompanying tasks such as, but not limited to, sitework, interconnecting utilities associated infrastructure, and applicable temporary provisions necessary to sequence the Work.

Temporary provisions shall include pipeline endcaps, other utility terminations, and temporary utilities as necessary to allow operation of portions of the Work prior to completion of other portions of the Work, consistent with the Contractor’s sequence of operations, although such provisions are not shown.

5. All existing Owner facilities shall remain in continuous operation except as specified herein.

6. Required Constraints and Suggested Task Sequencing:

a. Initial Sitework:

1) Install erosion control measures.

2) Install staging areas, separate Contractor entrance gates, and other site security measures.

3) Relocate existing utilities as shown and specified.

b. Phase 1 - Aeration Basin 1 and Basin 2 Improvements:

1) Preparation:

a) Coordinate with Owner for removal from service and disable Aeration Basin 1 and Basin 2 alarming from the control system during this outage.

b) Electrical and I&C Considerations for Aeration Basins and Related Facilities: Modifications of existing circuits require close coordination with Owner, documentation of removal from service request, and may require temporary power.

c) Install temporary, and quickly removable bulkheads in aeration basin influent channel to isolate and allow Contractor dewatering of channel.

d) Transfer mixed liquor, dewater and wash down aeration basin.

e) Clean and prepare concrete surfaces for rehabilitation.

01 31 13 - 8 SEPTEMBER 2026

2) Work:

a) Perform crack repair, controlled concrete surface rehabilitation, concrete joint cleaning and resealing and weir opening plate cleaning and resealing. This structural repair Work may be performed as a separate aeration basin removal from service, or concurrently with mechanical, electrical, and I&C Work associated with the aeration basins, provided the aeration basins are returned to service within the timeframe provided herein.

b) Install new gallery Access Hatches for Aeration Basin 1 and Basin 2.

c) Refurbish Aeration Basin 1 Valve: 560-32-001.

d) Replacement of pneumatic actuators with hand wheel operators for manual actuation of flow control valves 560-3251 and 560-3252.

e) Demo ALP header actuated valves, pneumatic actuators, thermal mass air flow meters, dissolved oxygen (DO) analyzers.

f) Replace flush water valves for Aeration Basin 1 and Basin 2.

g) Recondition the Influent side wall slide gates serving Aeration Basin 1 and Basin 2.

h) Demolish existing Effluent weir plates and install ten new full cover plates per basin.

i) Replace Effluent Channel ALP isolation valve 560-3221, valve 560-3222 and valve 560-3223.

j) Replace RAS flow control pneumatic actuator 560-3471, and actuator 560-3472.

k) Replace manual Knife Gate valve 530-3411 and valve 530-3412.

l) Replace MLR manual plug valve 540-3211 and valve 540-3212.

m) Install piping and pipe supports.

n) Install AHP piping for Zone 2 valves and supply air for ACPs in Basin 1 and Basin 2.

o) Install air header valves with pneumatic actuators, and thermal mass air flow meters on Aeration Basin 1 and Basin 2 for Zone 2, Zone 3, Zone 4, and Zone 5.

p) Installation of Control Panels: CP-3B, CP-3B-RIO-1, CP-3B-RIO-3, ACP-3261, and ACP-3262 including completion of electrical, communications, sensor cabling, and pneumatic tubing work.

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q) Install DO probe mounting hardware in preparation for sensor installation and testing at Zone 2, Zone 3, Zone 4, and Zone 5 of Aeration Basin 1 and Basin 2.

r) Modify handrail systems and install davit crane baseplates on Aeration Basin 1 and Basin 2.

s) Replace diffuser membranes for Aeration Basin 1.

(AB-2 is already complete.).

3) Testing:

a) Perform leak testing of modified piping and take corrective actions as needed. Most leak testing can be done as in-service testing with bubble testing of all flanges and mechanical joints.

(1) ALP piping at each basin flow control manifolds.

(2) ALP valves replace in Effluent Channels.

(3) AHP piping alongside Basins for control valves and oxygen sensors.

(4) Flush Valves in Basins.

(5) Slide Gates along Influent side walls in Basins.

(6) AHP Tubing associated with new RAS valve actuators in Gallery.

(7) RAS Knife Gate Valves in Gallery.

(8) MLR plug valve in Gallery.

b) Perform Functional Testing Part 1 for all new equipment (see Section 40 90 00, Instrumentation and Control for Process Systems).

c) Provide support for the Engineer’s Software Testing and perform Functional Testing Part 2 (see Section 40 90 00, Instrumentation and Control for Process Systems).

d) The Phase 1 startup, Functional Testing Part 2, and Performance testing of Aeration Basins 1 and 2 can begin after the following work is complete:

e) Installation and Commissioning of:

(1) Panels: CP-3B, CP-3B-RIO-1, CP-3B-RIO-3, ACP-3261, and ACP-3262.

(2) ALP pneumatic actuators, thermal mass air flow meters, and DO probes.

(3) RAS flow control valves 560-3421, 560-3471, and 560-3472.

4) Once each aeration basin Performance Test is complete and the basin meets Substantial Completion requirements, the Owner will operate those facilities.

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c. Phase 2 - Aeration Basins 3 and 4 Improvements:

1) Preparation:

a) Coordinate with Owner for removal from service and disable Aeration Basins 3 and 4 alarming from the control system during this outage.

c) Install temporary, and quickly removable bulkheads in aeration basin influent channel to isolate and allow Contractor dewatering of channel.

d) Transfer mixed liquor, dewater and wash down aeration basin.

e) Clean and prepare concrete surfaces for rehabilitation.

2) Work:

b) Relocate hose station at west end of Basin 4 in Gallery to make space for new Access Hatch.

c) Install new gallery Access Hatches for Aeration Basins 3 and 4.

d) Demolish the two polymer storage tanks by RAS Pump Building.

e) Replacement of pneumatic actuators with hand wheel operators for manual actuation of flow control valves 560-3253 and 560-3254.

f) Demo Air header actuated valves, pneumatic actuators, thermal mass air flow meters, dissolved oxygen (DO) analyzers.

g) Replace W5 flush water valves for Aeration Basins 3 and 4.

h) Recondition the Influent side wall slide gates serving Aeration Basins 3 and 4.

i) Demolish existing Effluent weir plates and install ten new full cover plates per basin.

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j) Replace Effluent Channel ALP isolation valves 560-3224 and 560-3225.

k) Replace RAS flow control pneumatic actuators 560-3473 and 560-3474.

l) Replace manual Knife Gate valves 530-3413 and 530-3414.

m) Replace MLR plug valves manual 540-3213 and 540-3214.

n) Set channel gates to divert Basins 1 and 2 effluents to Clarifier 1, this should allow for drying out Effluent channels and flumes in front of RAS Pump Building.

o) With the Effluent channels in front of RAS Pump building dried out; Mud Valve 590-3215 can be replaced. Additionally, flume gate 510-3275 can be refurbished and the operator can be replaced. And finally, both Effluent Flow Elements FE-3274 and FE -3275 can be installed.

p) While Clarifier 2 is offline the RAS pump inlet flow control valve actuator for valve 560-3422 can be replaced.

q) Also replace Effluent Channel ALP isolation valves 560-3224 and 560-3225 before reconfiguring the channel gates.

r) Once the above work is addressed, the channel gates can be set to divert the Basins 1 and 2 effluent flows to Clarifier 2, allowing for Flume Gate 510-3274 to be dried out.

s) Then Flume Gate 510-3274 can be refurbished and the operator replaced.

t) And with Clarifier 1 offline the RAS pump inlet flow control valve actuator for valve 560-3421 can be replaced.

u) Install piping and pipe supports.

v) Install AHP piping for Zone 2 valves and supply air for ACPs in Basins 3 and 4.

w) Install air header valves with pneumatic actuators, and thermal mass air flow meters on Aeration Basins 3 and 4 for Zones 2, 3, 4, and 5.

x) Installation of control panels: CP-3B-RIO-2, ACP-3263 and ACP-3264 including completion of electrical, communications, sensor cabling, and pneumatic tubing work.

y) Install DO probe mounting hardware in preparation for sensor installation and testing at Zones 2, 3, 4, and 5 of Aeration Basins 3 and 4.

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z) Modify handrail systems and install davit crane baseplates on Aeration Basins 3 and 4.

aa) Replace diffuser membranes for Aeration Basins 3 and 4.

bb) Coordinate with Owner the demolition of existing control panel LCP-3214 and salvage of internal hardware to the Owner.

3) Testing:

a) Perform leak testing of modified piping and take corrective actions as needed. Most leak testing can be done as in-service testing with bubble testing of all flanges and mechanical joints.

(1) ALP piping at each basin flow control manifolds.

(2) ALP valves replace in Effluent Channels.

(3) AHP piping alongside Basins for control valves and oxygen sensors.

(4) Flush Valves in Basins.

(5) Slide Gates along Influent side walls in Basins.

(6) AHP Tubing associated with new RAS valve actuators in Gallery.

(7) RAS Knife Gate Valves in Gallery.

(8) MLR plug valve in Gallery.

b) Perform Functional Testing Part 1 for all new equipment (see Section 40 90 00, Instrumentation and Control for Process Systems).

c) Provide support for the Engineer’s Software Testing and perform Functional Testing Part 2 (see Section 40 90 00, Instrumentation and Control for Process Systems).

d) The Phase 1 startup, Functional Testing Part 2, and Performance Testing of Aeration Basins 3 and 4 can begin after the following work is complete.

e) Installation and Commissioning of:

(1) Panels: CP-3B-RIO-2, ACP-3263 and

ACP-3264.

(2) ALP pneumatic actuators, thermal mass air flow meters, and DO probes.

(3) RAS flow control valves 560-3422, 560-3473, and 560-3474.

4) Once each aeration basin Performance Test is complete and the basin meets Substantial Completion requirements, the Owner will operate those facilities.

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d. Non Phase Specific Tasks:

1) Testing: Upon completion of leak testing for all of the disturbed ALP piping, the owner requests a complete system leak test be performed on the complete ALP piping system from the blowers in the Blower Building to the ALP flow control manifolds in the basins. Being some of this piping is buried and some is insulated this will be a simple leak down test rather than a bubble test. Report test results to Owner.

2) Once Phases 1 and 2 are complete along with the non phase specific tasks provide support for the Engineer’s Facility Performance Demonstration test of the automated logic.

G. Site Electrical System: No work required outside of aeration basin and RAS pump station facilities.

H. Removal from Service (RFS) and Facility Shutdown:

1. Unless indicated otherwise herein, removal from service (RFS) of existing treatment processes, facilities, or services (including connection of existing pipelines, electrical systems, or structures) shall be coordinated with the Owner and Engineer through a written RFS plan.

RFS plans shall be submitted sufficiently in advance of the RFS period (minimum of 2 weeks) and in appropriate detail to be reviewed and approved in a dedicated meeting a minimum of 2 days prior to the requested RFS date. The RFS plan shall include the purpose, procedures, and schedules for shutdown and startup of the subject process, facilities, or service; and emergency procedures and appropriate staffing levels for prevention of an extended shutdown period.

2. Contractor shall include the discussion of all current and expected RFS plans as part of the weekly construction meeting.

3. All diversions and shutdowns to plant flows and processes shall be subject to actual process, flow, and weather conditions existing at the time of the requested RFS. Owner’s determination regarding the acceptability of proceeding with a planned RFS shall be final.

4. In addition to the RFS plan, incorporate the following constraints regarding plant flow manipulation, duration, and/or time of year:

a. Potable (City) Water (W1, W2), and Plant (Treated Effluent)

Water (W3, W4, W5, W6): The maximum shutdown period is 2 hours. Plant staff will determine the time of day, and day of the week (Monday through Friday) that shutdown is acceptable. To maintain acceptable plant operation and fire protection, only one of these services may be shut down at a time.

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b. Raw Wastewater (Headworks Flows), Primary Influent and Primary Effluent (PI and PE): No shutdowns permitted.

c. Primary Sludge and Scum (PS and SC): The maximum shutdown period is 4 hours.

5. High Pressure Air (AHP): The Maximum Shutdown Period is 2 hours.

Plant staff will determine the time of day that shutdown is acceptable.

6. Power outages will be through the RFS process, with a minimum 2-week notice. Describe the reason, anticipated length of time, and areas affected by the outage. Provide temporary provisions for continuous power supply to critical facility components.

a. Anticipated power outages and durations for major electrical modifications are as specified in this section.

I. Do not proceed with Work affecting a facility’s operation without obtaining Owner’s and Engineer’s advance approval of the need for and duration of such Work.

J. Relocation of Existing Facilities:

1. During construction, it is expected that minor relocations of Work will be necessary.

2. Provide complete relocation of existing structures and Underground Facilities, including piping, utilities, equipment, structures, electrical conduit wiring, electrical duct bank, and other necessary items.

3. Use only new materials for relocated facility. Match materials of existing facility, unless otherwise shown or specified.

4. Perform relocations to minimize downtime of existing facilities.

5. Install new portions of existing facilities in their relocated position prior to removal of existing facilities, unless otherwise accepted by Engineer.

1.09 ADJACENT FACILITIES AND PROPERTIES

A. Examination:

1. After Effective Date of the Agreement and before Work at Site is started, Contractor, Engineer, and affected property owners and utility owners shall make a thorough examination of pre-existing conditions including existing buildings, structures, and other improvements in vicinity of Work, as applicable, which could be damaged by construction operations.

2. Periodic reexamination shall be jointly performed to include, but not limited to, cracks in structures, settlement, leakage, and similar conditions.

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B. Documentation:

1. Record and submit documentation of observations made on examination inspections in accordance with Article Construction Photographs and Article Audio-Video Recordings.

2. Such documentation shall be used as indisputable evidence in ascertaining whether and to what extent damage occurred as a result of Contractor’s operations, and is for the protection of adjacent property owners, Contractor, and Owner.

1.10 CONSTRUCTION PHOTOGRAPHS

A. General:

1. Photographically document all phases of the Project including preconstruction, construction progress, and post-construction.

2. Engineer shall have right to select subject matter and vantage point from which photographs are to be taken.

3. Digital Images: No post-session electronic editing of images is allowed.

Stored image shall be actual image as captured without cropping or other edits.

B. Preconstruction and Post-Construction:

1. After Effective Date of the Agreement and before Work at Site is started, and again upon issuance of Substantial Completion, take photographs of Site and property adjacent to perimeter of Site.

2. Format: Digital, minimum resolution of 1680 pixels by 2240 pixels and 24-bit, millions of color.

C. Construction Progress Photos:

1. Photographically demonstrate progress of construction, showing every aspect of Site and adjacent properties as well as interior and exterior of new or impacted structures.

2. Weekly: Take a minimum of 20 digital photographs.

3. Monthly: Take a minimum of 20 digital photographs.

D. Documentation:

1. Digital Images:

a. Electronic image shall have date taken embedded into image.

b. Archive using a commercially available photo management system that provides listing of photographs including date, keyword description, and direction of photograph.

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c. Label file folders or database records with Project and Owner’s name, and month and year images were produced.

1.11 AUDIO-VIDEO RECORDINGS

A. Prior to beginning the Work on Site or of a particular area of the Work, and again within 10 days following date of Substantial Completion, videograph Site and property adjacent to Site.

B. In the case of preconstruction recording, no work shall begin in the area prior to Engineer’s review and approval of content and quality of video for that area.

C. Particular emphasis shall be directed to physical condition of existing vegetation, structures, and pavements within project area and areas adjacent to and within the right-of-way or easement, and on Contractor storage and staging areas.

D. Engineer shall have right to select subject matter and vantage point from which videos are to be taken.

E. Video Format and Quality:

1. DVD format, with sound.

2. Video:

a. Produce bright, sharp, and clear images with accurate colors, free of distortion and other forms of picture imperfections.

b. Electronically, and accurately display the month, day, year, and time of day of the recording.

3. Audio:

a. Audio documentation shall be done clearly, precisely, and at a moderate pace.

b. Indicate date, project name, and a brief description of the location of recording, including:

1) Facility name.

2) Street names or easements.

3) Addresses of private property.

4) Direction of coverage, including engineering stationing, if applicable.

F. Documentation:

1. DVD Label:

a. DVD number (numbered sequentially, beginning with 001).

b. Project name.

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2. Date and time of coverage.

3. Project Video Log: Maintain an ongoing log that incorporates above noted label information for DVDs on Project.

1.12 REFERENCE POINTS AND SURVEYS

A. Location and elevation of benchmarks are shown on the Drawings.

B. Contractor’s Responsibilities: Provide survey and layout required to layout the Work.

1.13 ELECTRONIC DOCUMENT MANAGEMENT SYSTEM

A. The Owner and Contractor shall utilize an Owner provided electronic document management system (EDMS) similar to Procore, “or-equal,” for electronic submittal of all data and documents throughout the duration of the Contract. The Owner furnished EDMS will be made available to all Contractors’ Project personnel, subcontractor personnel, suppliers, consultants, and the Designer of Record. The joint use of this system is to facilitate, electronic exchange of information, automation of key processes, and overall management of the Contract. The EDMS shall be the primary means of Project information submission and management. When required by the Owners representative, paper documents will also be provided. In the event of discrepancy between the electronic version and paper documents the paper documents will govern.

B. User Access Limitations:

1. The Owner’s Representative will control the Contractor’s access to the EDMS by allowing access and assigning user profiles to accepted Contractor personnel. User profiles will define levels of access into the system, determine assigned function-based authorizations (determines what can be seen), and user privileges (determines what they can do).

Subcontractors and suppliers will be given access to the EDMS through the Contractor. Entry of information exchanged and transferred between the Contractor and its subcontractors and suppliers on the EDMS shall be the responsibility of the Contractor.

2. Joint Ownership of Data: Data entered in a collaborative mode (entered with the intent to share as determined by permissions and workflows within the EDMS) by the Owner’s Representative and the Contractor will be jointly owned.

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C. Automated System Notification and Audit Log Tracking: Review comments made (or lack thereof) by the Owner on Contractor submitted documentation shall not relieve the Contractor from…

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