Pima County Regional Optimization Master Plan

1. Pima County Regional Optimization Master Plan Michael Gritzuk, P.E., Director,Pima County Regional Wastewater Reclamation Department Arizona County Engineers Association Wickenburg, Arizona January 10, 2008

2. PCRWRDTreatmentFacilities 1 2 3 4 5 6 7 8 9 10 11 Roger Road WWTP Ina Road WPCF Green Valley WWTF Pima County Fairgrounds WWTF Avra Valley WWTF Corona de Tucson WWTF Arivaca Junction WWTF Marana WWTF Mt. Lemmon WWTF Rillito Vista WWTF Randolph Park WRF

3. TheMetropolitanSewerageSystem Ina Road WPCFSewer Basin = 198 square miles Ina Road WPCF Roger Road WWTP Roger Road WWTPSewer Basin = 275 square miles

4. 5-stage Bardenpho process(Source: EIMCO Water Technologies) Clarifier N2 N2 O2 O2 1 2 3 4 5 Ferment-ation FirstAnoxic Nitrification SecondAnoxic Re-aeration Recycle Sludge Waste Sludge Regional Optimization Master Plan Goals • Current and future regulatory compliance • Meet capacity needs to 2030 • Upgrade / rehabilitate aging infrastructure • State-of-the-art technology • Staff-friendly • Automation • Community acceptance

5. Regional Optimization Master Plan Scope of Work • Develop the optimal treatment process and plan to comply with regulatory requirements to reduce total nitrogen concentrations in discharged effluent • Master plan foreseeable future regulatory requirements • Determine the long-term capacity needs of the County metropolitan facilities, conveyance system and outlying growth areas Ina Road WPCF Headworks

6. Regional Optimization Master Plan Scope of Services • Develop long-term plan for the treatment, handling and reuse of system bio-solids and bio-gas • Develop a detailed implementation schedule to meet regulatory implementation deadlines and the optimization master plan • Develop a financial plan to support the system’s regulatory and other needs for the next fifteen years

7. Regulatory Implementation Requirements to Reduce Total Nitrogen Concentrations

8. ROMP Plan • Expand Ina Road WPCF to 50 mgd • Construct new 32 mgd Water Reclamation Campus (in vicinity of existing Roger Road WWTP) • Plant Interconnect – 28 mgd average, 72 mgd peak flow • Decommission existing 41 mgd Roger Road WWTP Ina Road WPCF Roger Road WWTP

9. ROMP Cost Estimate (2006 dollars) * * Cost estimate includes design costs, UV disinfection and 5% contingency.

10. Ina Road WPCF • Expand treatment capacity to 50 mgd • Convert existing process to Bardenpho process • Additional 12.5 mgd expansion • Most cost-effective utilization of existing headworks capacity of 50 mgd • Centralized biosolids processing and handling • Reduces overall cost • Provides for co-generation bio-gas utilization at one location • Provides one point of distribution of final product

11. EXISTING PROPOSED: Bardenpho Treatment Units Primary Clarifier Secondary Clarifiers Digesters Thickener Tanks Enhanced Chlorination 50 MGD Ina Road RWRFOverall Plant Aerial View with Screen Enclosure Existing and Expanded Ina Road RWRF Approximately 160 acres Proposed extent of screen enclosure SportsPark

12. 50 MGD Ina Road WPCF Screen Enclosure Concept, Interior View South facing solar panels w/perimeter lighting Natural stone gabion base Wire mesh screen Cor-ten steel frame

13. 32 MGD Water Reclamation CampusOverall Aerial View Preliminary Treatment NORTH Water Reclamation Campus Approximately 41 acres Aeration Basins Clarifiers Disinfection Central Lab Building Administration Building Existing Roger Road WWTP Approximately 48 acres Santa Cruz River

14. 32 MGD Water Reclamation Campus Admin. and Central Lab Building Concept Aerial View Parking Administration Building Central Lab Building • Recycled content aluminum • shell with natural finish • West façade perforated for sun • control with view maintained • Solar collection capacity over roof surface

15. 32 MGD Water Reclamation Campus Support Building and Aeration Tank Concepts Santa Cruz River Support Buildings Aeration Tanks Support Building Clarifiers

16. 32 MGDWater Reclamation CampusAdmin. and Central Lab Building Portico at east face of buildings facing athletic fields

17. Implementation Schedule

18. ROMP Implementation Costs Current Estimated Cost (2006 dollars): $536 million Cost Inflation (assuming an inflation rate of 5% over 15 years): $719 million Bonding / Debt Service $1+ billion

19. Possible Community Enhancements • Park enhancements • Regional / International Sports Complex • Economic development • Environmental enhancement • Water Reclamation Campus • Study underway SoftballDiamonds CommercialDevelopment SoccerFields BaseballDiamonds Existing WWTP Wetlands

20. ROMP Procurement Schedule

21. Plant Interconnect – Roger Road WWTP to Ina Road WPCF Design Consultant – Brown & Caldwell Contract : June 2007 Contruction Manager at Risk: Contractor selected, under negotiations Project Management: PCRWRD staff Full-time Inspection: To be determined

22. Ina Road Upgrade/Expansion Design Design Consultant RFQ advertised: October 2007 Selection process: Underway Consultant selected: February 2008 Complete negotiations & NTP: April 2008 Construction Manager at Risk RFQ advertised: December 2007 Anticipate contract: March 2008 Project Management: To be determined Full-time Inspection:To be determined

23. Water Reclamation Campus Procurement Method Decided: Summer 2008 Examples of methods to be evaluated: Design Build (DB) Design Build Operate (DBO) Design Build Finance Operate (DBFO) Others? RFQ Advertisement: Fall 2008 Project Management: To be determined Full-time Inspection: To be determined