RFP_Wastewater_Effluent_Sourced_District_Energy_Study_final.pdf

REQUEST FOR PROPOSALS

FOR

PROFESSIONAL ENGINEERING STUDY SERVICES

PAR 1469

WASTEWATER EFFLUENT THERMAL ENERGY RECOVERY

AND DISTRIBUTION STUDY

April 2025

Introduction

Metro Water Recovery (Metro) intends to engage a consulting engineer (Consultant or Firm) to provide professional study services for a wastewater effluent thermal energy recovery and distribution study (Project) at Metro’s Robert W. Hite Treatment Facility (RWHTF) located at 6450 York Street in Denver, Colorado.

Project Objective

The objective of this RFP is to select a Firm qualified to provide engineering services for a study of a wastewater effluent thermal energy recovery and distribution project to support regional campus and district energy systems. Thermal energy transfer equipment will be evaluated at the RWHTF where thermal energy from the effluent will be transferred to a thermal energy distribution piping network. Up to three alternatives will be explored for the thermal energy capture and associated distribution which may include onsite thermal upgrading. The Project will investigate transferring the thermal energy to Xcel Energy’s existing district energy system in Downtown Denver and two nearby developments, (i.e., the Ball Arena and River Mile). The Project will explore individual and system technologies, configurations, and solutions to maximize the benefit of a wastewater thermal energy sourced distribution system, while notably reducing the thermal energy load discharged into the South Platte River and minimizing the required resources.

Through the Project execution, the Project team will develop an understanding of all required Project components including planning, design, construction, administration, operation, and maintenance considerations for the system. The Project outcomes will include a development of planning-level design documents; life cycle cost estimates for construction and cost of ownership, operations, and maintenance requirements; and financial modeling to estimate and support future net present value and payback analyses.

Permitting and easement requirements will be assessed to understand and evaluate the anticipated supply and return piping network. A thermal model will be developed to understand anticipated reductions of temperature at the wastewater effluent and supply and return temperatures of the thermal distribution to potential district energy networks and/or customers in the region.

About Metro Water Recovery

Metro was formed under Colorado law in 1961. Metro is the largest water resource recovery agency in the Rocky Mountain West, serving approximately 2.2 million people in an 817-square mile area. In partnership with 65 local governments, comprising of cities, counties, sanitation districts, and water and sanitation

PAR 1469 – Wastewater Effluent Thermal Energy Recovery and Distribution Study Request for Proposal April 2025 - Page 2 districts, we clean millions of gallons of water every day to be suitable for agriculture, aquatic life, recreation, and water supply. Counties served by our water treatment facilities are Denver and parts of Adams, Arapahoe, Douglas, Jefferson and Weld.

The following provides an overview of Metro’s facilities. This RFP scope relates exclusively to the

RWHTF.

• Robert W. Hite Treatment Facility (RWHTF) - 6450 York Street Denver, CO o Treats an average of 130 million gallons per day (MGD) o Capacity to treat 220 MGD

• Northern Treatment Plant (NTP) - 51 Baseline Road, Brighton, CO o Treats an average of 7.8 MGD o Capacity to treat 28.8 MGD

• METROGRO Farm - Elbert and Arapahoe Counties, CO o 52,000 dryland farm and pasture acres o Approximately 85 dry tons of Class B biosolids are beneficially reused per day

• Transmission System (Metro owned) o 234 miles of interceptors o 3 lift stations o Odor control facilities, metering facilities, and other associated appurtenances.

Visit us at www.MetroWaterRecovery.com

Schedule of Events

The following Schedule of Events represents the best estimate of the schedule Metro will follow, which is subject to change at Metro’s discretion. Metro reserves the right to add or delete events as necessary.

Event Date/Time

Solicitation Posted on Bid Net April 24, 2025

Mandatory Virtual Pre-Proposal Conference May 5, 2025, 10:30-11:30 AM

Requests for Information/Clarification Deadline May 9, 2025, 5:00 PM

Response to Requests for Information/Clarification May 16, 2025

Proposal Due Date May 22, 2025, 3:00 PM

Notify Shortlisted Firms June 12, 2025

Presentation/Interview, if needed June 18, 2025

Notification of Award June 19, 2025

Execute Agreement September 2025

All listed times are mountain time zone.

Metro Representatives

The Metro Project Manager, Mark Hofmeister will administer the consultant agreement and manage the Project for Metro.

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Mark Hofmeister, Principal Civil Engineer 6450 York Street Denver, CO 80229 303-286-3229; Mhofmeister@MetroWaterRecovery.com

The Technical Manager, Dan Freedman, will provide Metro expertise to the consultant, collaborate with the Project team, and analyze the technical elements of the Project.

Dan Freedman, Director of Technology and Innovation

Denver, CO 80229 330-475-5631; Dfreedman@MetroWaterRecovery.com

Background

Metro has regulatory, financial, and environmental drivers for large-scale thermal energy recovery from its RWHTF effluent. Each is briefly explained in the following paragraphs.

Regulatory Drivers The Colorado Department of Public Health and the Environment (CDPHE) adopted in 2009 temperature standards for the South Platte River Basin. The effluent limits applying to RWHTF’s effluent are in winter months (December-February) 12 degrees Celsius (°C) and in summer months (July-October) 24 °C.

Historical effluent temperature monitoring data indicates that the RWHTF effluent does not meet the maximum weekly average temperature (MWAT) limits in winter months starting on December 1 through the end of February, necessitating significant capital investments in thermal energy discharge mitigation facilities to achieve compliance. At the beginning of December, the wastewater effluent temperature is commonly about 20 °C requiring a temperature reduction of about 8 °C to meet future required discharge permit limits in winter months (see Attachment 05). Note that historically, Metro has not exceeded temperature limits in its RWHTF effluent in summer months, however the temperature delta’s have been marginal in some summer weeks posing potential limits to Metro’s ability to use its effluent as a heat sink.

Metro currently discharges two separate effluents from the North and South secondary treatment complexes, respectively, into the South Platte River. Currently both effluents are separately disinfected prior to discharge. Future nutrient effluent limits are anticipated to require modification to Metro’s facilities to likely require combining both secondary effluent streams to treat a single effluent stream in future tertiary treatment facilities followed by discharge through a new, combined outfall structure. The timing of these facility upgrades is not yet determined and may impact the potential source water supply configuration for on-site effluent heat recovery facilities. (See Attachments 09 and 10 for additional background on the

RWHTF.)

Financial Drivers Metro is undertaking a multi-pronged portfolio approach to reduce thermal energy discharge into the South Platte River. Mechanical effluent cooling using once-through cooling towers has been evaluated through desktop analyses and demonstration testing. Metro estimates a total project capital expenditure of $82.4M for cooling towers at the Hite facility. The implementation of cooling towers will require additional energy input for operation and dissipate more than 200 megawatt (MW) of potentially recoverable thermal energy into the atmosphere.

Environmental Drivers Metro’s mission is to protect the region’s health and environment by cleaning water and recovering resources. For this reason, Metro has been investigating various opportunities for wastewater thermal energy use (WTEU) systems on Metro’s facility premises and in its service area. In recent years, several small and mid-sized WTEU systems have been implemented. For example, Metro provides 4 MW thermal

April 2025 - Page 4 heating and cooling energy to the National Western Center in Denver, CO from Metro’s Delgany Interceptor.

Metro continues to look for opportunities to develop smaller, localized heat recovery systems within the wastewater collection system, however, the ability to recover large amounts of thermal energy from the wastewater collection system for nearby end users has logistical and technical limitations. The 4 MW system at the National Western Center reduces the influent wastewater temperature at Metro by less than

0.5 °C. Also, the allowable wastewater influent temperature reduction is limited by the need to provide biological wastewater treatment at the current treatment capacity rating at the RWHTF.

For this reason, Metro is exploring engineering and financial options for recovering large-scale thermal energy from the treated effluent. In recent years, these types of systems are in planning, construction or already in operation in several central European cities, proving they are technically feasible. Specifically, Metro is seeking engineering planning and cost evaluations for the construction of centralized effluent heat recovery systems with capacity on the order of 50-200 MW for substantial temperature reductions in the discharged effluent and the infrastructure required to deliver this energy to commercial, industrial, and/or district energy end users.

One option to be evaluated as part of this study is to supply the thermal energy from Metro to customers in downtown Denver. Xcel Energy is currently providing downtown customers energy through district steam and chilled water systems that is considered for conversion into an ambient loop district energy system supplied by renewable thermal energy sources. Metro is further interested in support for identifying additional future customers and in understanding phasing options for large-scale WTEU system construction to demonstrate tangible progress toward heat load discharge reduction through the evaluation, planning, and implementation of large-scale energy recovery systems.

Scope of Work

Metro proposes the following scope elements and encourages firms to highlight proposed modifications or additions to the scope elements or their sequence as needed to accomplish the study goals efficiently.

The study scope will involve close collaboration with Metro staff and external partners to evaluate alternatives for the transfer and distribution of thermal energy from the RWHTF to Xcel Energy’s existing district energy system in Downtown Denver and two nearby developments, the Ball Arena and River Mile.

Two system alternatives will be developed for a 2-pipe and 4-pipe district energy distribution approach, delivering pre-feasibility study, planning-level design, construction cost and schedules. The study will include an implementation plan and recommended next steps. Specifically, the scope will consist of the following tasks:

1. Basis of Design – Thermal Energy Supply and Demand Analysis

1.1. Demand-Side Basis of Design Summary

1.1.1. Summarize the existing thermal energy loads and temperature needs of the Downtown Denver District Steam System, and future loads of the Ball Arena and River Mile developments. Summarize the average and peak heating and cooling loads as available, system thermal load projections over the next 20 years for the Ball Arena and River Mile developments, and seasonal and diurnal variations in thermal demand. Assume for Metro to provide this data to Consultant.

1.2. Supply-Side Basis of Design Analysis

1.2.1. Analyze historical RWHTF effluent flow and temperature data to determine monthly average and representative diurnal thermal energy availability for capture and beneficial use. Evaluate seasonal and diurnal variations in flow and temperature to quantify the

April 2025 - Page 5 available thermal capacity for heat recovery from the RWHTF north and south effluents while being technically feasible and efficient. Assess impacts on seasonal effluent discharge temperatures by week during the winter compliance period.

1.2.2. Using the demand forecasting established in Task 1.1, develop the system thermal design criteria for thermal energy recovery infrastructure. Conduct this analysis for the North and South effluent streams separately and calculate the temperature impact on the combined effluent.

1.2.3. Based on cooling demands identified in Task 1.1, assess the feasibility of using the RWHTF effluent as a heat sink for district cooling applications. Identify seasonal cooling loads and determine to what extent the effluent could be used for this purpose, considering current and potential future summer temperature discharge requirements.

Estimate impacts on seasonal effluent discharge temperatures by week during the summer compliance period. Incorporate the findings of this analysis into subsequent tasks and into the economic analysis in Task 4.

1.3. Establish System Design Criteria

1.3.1. Based on the results of the supply and demand analyses, establish design flows, thermal energy loads, and corresponding system capacity requirements.

1.3.2. Develop a simple phased implementation strategy that aligns with demand forecasts, end-user project timelines, and anticipated system expansion.

1.4. Deliverables

1.4.1. Prepare a draft and final technical memorandum (TM) 1 summarizing the findings of each subtask. The TM shall include relevant data evaluations and be accompanied by supporting calculations and analyses in a format acceptable to Metro.

1.4.2. Present the findings of Task 1 in a workshop scheduled after delivery of Draft TM 1.

2. Alternatives Analysis and Planning-Level Design of Thermal Energy Recovery Facility

2.1. Thermal Energy Recovery Equipment

2.1.1. Assess equipment requirements for capturing and transferring wastewater thermal energy from the plant effluent. Conduct this analysis for two energy recovery facility alternatives:

a. Supply temperature compatible with a 2-pipe system (ambient loop district energy system)

b. Supply temperature compatible with a 4-pipe system (hot and chilled water loops district energy system).

2.2. Thermal Energy Recovery Facility Design Development

2.2.1. The evaluation will assume the proposed siting of system components at the RWHTF. If beneficial, document options for decentralized locations offsite for subsequent evaluation outside of this study, to optimize system design, operational performance, and overall efficiency. Thermal recovery system designs shall be developed with consideration given to the use of secondary effluent as well as potential future transition to tertiary effluent as possible. Elements of the alternatives analysis shall include the following:

a. Heat Recovery Intake System. Evaluate a suitable intake location of North and/or South effluent for heat recovery within the existing RWHTF treatment train. Consider the fouling potential of the respective wastewater sources in the design development. Include pumping system and pretreatment requirements in the pre-planning design to protect the heat recovery system, redundancy, maintainability, and operability.

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b. Heat Exchangers. Evaluate the pros and cons of including heat exchangers in the two heat recovery facility alternatives. Consider the fouling potential of the wastewater source pre- and post-disinfection to develop feasible design concepts. Select appropriate approaches to the system designs, if selected, as a basis for the conceptual cost evaluation.

c. Heat Pump Integration. Evaluate typical technology alternatives, establish equipment selection criteria, system configurations, redundancy, energy consumption and costs for the two energy recovery facility alternatives.

d. Thermal and Electrical Storage. Document potential opportunities for incorporating thermal and electrical storage systems for subsequent evaluation outside the scope of this study, to support load shifting and peak shaving onsite or offsite.

e. Siting and Phasing Assessment. Assess space requirements and align with space availability at the RWHTF for siting of the heat recovery facilities considering future treatment process that are anticipated to be needed, current separate effluent conditions and future combined outfalls. For the proposed site location, estimate area requirements, building or enclosure footprints, coefficient of performance, equipment tonnage estimates, and projected system output in kBtu/hr and MWh/month of the year.

2.3. Deliverables

2.3.1. Prepare a draft and final TM 2 summarizing the findings of this task. The TM shall include planning-level design documents and be accompanied by supporting calculations and analyses in a format acceptable to Metro.

2.3.2. Present the findings of Task 2 in a workshop scheduled after delivery of Draft TM 2.

3. Alternatives Analysis and Planning-Level Design of Thermal Energy Distribution Network

3.1. Planning-Level System Design

3.1.1. Conduct an evaluation of thermal supply and return piping systems for the distribution of thermal energy from Metro’s RWHTF to the three Downtown Denver demand locations.

Consider feasible routing alternatives for the 2-pipe and 4-pipe alternatives off the plant site under consideration of future planned facilities and possibly required ditch / stream crossings.

The evaluation shall address technical and financial considerations. Elements of the alternatives analysis shall include the following.

a. Operating Temperature, Flow and Pumping Optimization. Evaluate an efficient feasible thermal piping distribution design to meet the target temperatures identified in Task 1 (i.e., the two different district energy heating systems). Estimate supply and return operating temperatures and flow rates to maximize thermal system and pumping efficiency. Document considerations for the integration of the distribution system with end-user systems that should be further evaluated beyond the scope of this study.

b. Pipe Network Design and Materials. Develop a conceptual pipe routing option. Identify affected land uses, property ownerships, access rights, right-of-way constraints, existing utility corridors, permitting and easement requirements, and potential community impacts. Include appropriate pipe material and insulation in the planning cost estimate to minimize thermal losses, ensure durability, and facilitate ease of maintenance.

c. Hydraulic and Pumping Requirements. Estimate hydraulic requirements for the proposed pipe network based on estimated pressure loss, energy consumption, and estimated thermal losses during transmission. Include distribution pumping station requirements, potential locations for siting, and integration with the thermal energy recovery facility in the planning level design and cost estimates.

April 2025 - Page 7

3.2. Deliverables

3.2.1. Prepare a draft and final TM 3 summarizing findings of this task. The TM shall include planning-level design documents and be accompanied by supporting calculations and analyses in a format acceptable to Metro.

3.2.2. Present the findings of Task 3 in a workshop scheduled after delivery of Draft TM 3.

4. Planning-Level Design and Cost Estimating

4.1. System Summary and Evaluation

4.1.1. Combine selected alternatives from the thermal energy distribution network and the thermal energy recovery facilities to summarize into integrated system configurations. The evaluation shall summarize key technical, operational, financial, and environmental aspects as outlined below:

a. Planning-Level Design Development. Develop system planning-level design documentation for both RWHTF infrastructure and thermal energy distribution components. These documents will support cost estimating and implementation planning efforts.

b. Implementation Plan. Provide a high-level construction schedule identifying critical path activities, major milestones, and required regulatory permits.

c. Cost Estimating. Develop an AACE Class 5 Opinion of Probable Construction Cost (OPCC) and Total Project Cost Estimate (TPCE). Provide cost projections, including average and peak electricity consumption, for the operation and maintenance of the thermal energy recovery and distribution facilities to determine total cost of ownership.

d. Environmental and Social Impact Assessment. Estimate system-wide electrical consumption and thermal performance, including seasonal coefficient of performance (COP) to assess overall system efficiency. Document environmental costs and benefits of the proposed district energy systems. Estimate avoided greenhouse gas (GHG) emissions and air quality improvements resulting from the displacement of fossil-fuel based heating and, if applicable, cooling systems.

e. Public Outreach and Communication Support. Reserve a total of 96 hours to support Metro in public outreach and communication efforts related to this study. This may include preparation of high-level accessible presentation materials to communicate the environmental and social benefits of the project to various audiences, content development for maintaining Project page of Metro’s website, content development to update the Thermal Energy webpage and support required community engagement reporting.

4.2. Deliverables

4.2.1. Prepare a draft and final TM 4 summarizing findings of this task. The TM shall include planning-level design documents, OPCC and TPCE breakdowns, and Excel-based tools for operating cost projections.

4.2.2. Present the findings of Task 4 in a workshop scheduled after delivery of Draft TM 4.

5. Recommendations, Documentation, and Roadmap

5.1. Recommendations

5.1.1. Provide recommendations to guide future project development. Include key project risks and knowledge gaps, along with identification of additional analyses or planning efforts needed to mitigate uncertainty and support successful implementation.

April 2025 - Page 8

5.2. Implementation Roadmap

5.2.1. Provide a roadmap for project advancement, recommended next steps, key outreach and stakeholder engagement efforts, permitting milestones, and decision points necessary for moving toward implementation.

5.3. Deliverables

5.3.1. Provide a comprehensive compilation of all TMs developed throughout the project including analyses and recommendations developed in Task 5. The final documentation shall include an executive summary and a conclusion chapter that synthesizes the findings of the study and provides complete, actionable recommendations for project advancement.

Conditions

The selected consulting Firm will be experienced in providing a range of services throughout the Project.

The Firm will have demonstrated expertise in the following areas:

• Civil/Environmental

• Mechanical

• Energy Systems / Thermal Systems

• Electrical, Instrumentation, and Controls

The selected Firm will be required to enter into an agreement using Metro's enclosed standard agreement form (attached for reference only) which is based on EJCDC documents.

Metro will only consider exceptions to sections 1.0 Services, 2.0 Payment and 3.0 Insurance. Any exceptions must be specifically stated in the Proposal. Metro may accept or reject such exceptions at its sole discretion. Other than these limited enumerated exceptions, non-acceptance of the standard Metro agreement will render a Firm non-responsive and ineligible for award, at Metro’s sole discretion. By submitting a proposal, Firms agree to these terms.

Construction contract documents will not be provided from this scope of work.

Those individuals who are to be in responsible charge of the Project will be required to hold the appropriate professional registration in the State of Colorado. The Firm will be required to submit status reports on the progress of the work with each billing to Metro.

The selected Firm will be required to comply with Metro's policies including, but not limited to safety, security, substance abuse, non-smoking, and equal opportunity.

Mandatory Pre-Proposal Conference

A one-hour mandatory virtual pre-proposal conference will be held for interested Firms on the date and time indicated in the Schedule of Events. To attend, please contact the Metro’s Project Manager at least one day prior to the event.

Requests for Information and Clarification

Proposing Firms may make written requests for information and clarification by contacting both, the Metro Project Manager, Mark Hofmeister and Technical Project Manager, Dan Freedman, via email. Please ensure “RFP – PAR 1469” is included in the subject line of all email communications. No inquiries will be

April 2025 - Page 9 accepted after the date and time indicated in the Schedule of Events. The Metro Project Manager will issue a final response through BidNet on or about the date indicated in the Schedule of Events.

Proposal Requirements

Submit an electronic proposal through BidNet by the date indicated in the Schedule of Events addressed to:

Mark Hofmeister and Dan Freedman Metro Water Recovery

Denver, CO 80229-7499

Proposals shall be brief. Limit the total length of the core proposal to ten (10) single-sided pages maximum, which does not include the cover letter, index and/or table of contents, front and back covers, title pages/separation tabs, individual résumés, and appendices. A maximum of four (4) pages can be in 11x17 tri-fold format. Proposer must use 11-point font or larger. Appendices may be provided, but information contained within the appendices should be minimal and the Selection Committee may or may not review this information. Proposals shall address the following:

• Any requested language changes to the Services, Payment and Insurance sections of the Standard Agreement.

• Reasons the Firm should be selected for the work.

• General discussion on the approach to the work. Include any unique approaches, specialized experience, and specific ideas to accomplish the work.

• Description of the Firm including size, local office capabilities, applicable experience, and financial condition.

• Description of any joint venture and sub-consultant arrangements including applicable experience.

• Names, background, applicable experience, office location and availability of specific personnel to be assigned to the work and the work element to which they will be assigned. Include the professional registration status of those in responsible charge.

• Brief description of recent similar projects performed by the Firm(s), key personnel, and sub-consultants. Include a list of similar project locations, contact names and phone numbers.

• Brief discussion of the current workload of the Firm(s) and the personnel to be assigned, and their ability to perform the work on time.

• Discussion on where the work will be performed and managed.

• Project schedule.

• Price Proposal for the project including rate schedule, total manhours, and upper-limit cost for performing the services. Present cost breakdown by Task (five total tasks).

Selection Process

Proposals will be evaluated by Metro staff members who withhold the right to select up to three Firms for subsequent presentation/interviews (P/I's), as needed to make a final selection. The P/I's will include a 30-minute presentation by the Firm and about 15-minute question and answer period.

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Miscellaneous Provisions

Metro is not liable for any cost incurred in developing or submitting a proposal, attending meetings, presentations, or other necessary requirements.

Proposals must be submitted via BidNet. All proposals must be clear, concise, accurate, and legible so that there is no doubt as to the intent and scope of the proposal.

Proposals may be withdrawn, in writing, at any time prior to the due date and time.

All proposals must be valid for a minimum of 120-calendar days from the date proposals are due. All responses and accompanying documentation will become the property of Metro at the due date and time.

Any person, Firm, corporation, or association submitting a proposal shall be deemed to have read and understood all the terms, conditions, and requirements in the solicitation and attached information.

No proposal shall be accepted from, nor any contract be awarded to, any Firm that is in arrears upon any obligations to Metro, or that otherwise may be deemed irresponsible or unreliable.

By submission of a proposal, the Firm certifies that the proposal has been arrived at independently and submitted without collusion with any other Firm, and that the contents of the proposal have not been communicated to any person not an employee or agent of the Firm or its surety on any bond furnished herewith and will not be communicated to any person prior to the due date and time for proposals.

News releases, including social media, pertaining to this solicitation and/or resultant award shall not be made without Metro’s written approval.

Metro reserves the right to cancel this solicitation in whole or in part, at any time, without penalty. This solicitation implies no obligation on the part of Metro and does not constitute an offer or a contract with any proposing Firm or other party.

Open Records

The vendor acknowledges that Metro is a public entity subject to the Colorado Open Records Act, §24-72- 201, et. seq., C.R.S. (“CORA”). Consequently, the proposal, including any accompanying information and/or documentation that the vendor submits in conjunction therewith is public records available for public review under CORA. Written requests for confidentiality shall be submitted by the Firm with the proposal.

The Firm must state, specifically, what elements of the proposal are to be considered confidential and/or proprietary and must state the statutory basis for the request under the Public (open) Records Act. (Section 24-72- 201 et seq., C.R.S.). Confidential and/or proprietary information must be readily identified/marked.

Neither a proposal in its entirety, nor price information will be considered confidential and/or proprietary.

Any information that will be included in any resulting contract cannot be considered confidential and/or proprietary.

Attachments

• 01 Standard Agreement between Metro Water Recovery and (Consultant) for Professional Services (including Exhibits)

• 02 Consultant Guidelines for Performing Professional Services for Metro Water Recovery

• 03 Security and Access Control Procedures

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• 04 Non-Construction Contractor, Vendor, Visitor Safety Awareness Manual Activities (RWHTF)

• 05 RHWTF Effluent Temperature and Flow Data

• 06 Colorado Public Utilities Commission Proceeding No. 22A-0832ST, Hearing Exhibit 108, Supplemental Direct Testimony of Joseph T. Schwark

• 07 Colorado Public Utilities Commission Processing No. 22A-0832ST, Hearing Exhibit 108, Attachment JTS-4, RMH Heat Pump Study

• 08 Colorado Public Utilities Commission Proceeding No. 22A-0832ST, Hearing Exhibit 108, Attachment JTS-5, Salas O’Brien Ambient Loop Study (Public Version)

• 09 2018 Facility Plan, Chapter 7, RWHTF Existing Conditions

• 10 2018 Facility Plan, Chapter 8, RWHTF Process Improvements