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HomeMy WebLinkAbout04.b. Review draft Position Paper to authorize the General Manager to execute a professional engineering services agreement with Carollo Engineers, Inc. in an amount not to exceed $900,000 for planning and pre-design services for the Ultraviolet (UV) Dis Page 1 of 11 Item 4.b. CENTRAL SAN BOARD OF DIRECTORS POSITION PAPER DRAFT MEETING DATE: MARCH 30, 2021 SUBJECT: REVIEW DRAFT POSITION PAPER TO AUTHORIZE THE GENERAL MANAGER TO EXECUTE A PROFESSIONAL ENGINEERING SERVICES AGREEMENT WITH CAROLLO ENGINEERS, INC. IN AN AMOUNT NOT TO EXCEED $900,000 FOR PLANNING AND PRE-DESIGN SERVICES FOR THE ULTRAVIOLET (UV) DISINFECTION REPLACEMENT, DISTRICT PROJECT (DP) 100012 AND UV HYDRAULIC IMPROVEMENTS, DP 100013 SUBMITTED BY: INITIATING DEPARTMENT: NITIN GOEL, SENIOR ENGINEER ENGINEERING AND TECHNICAL SERVICES- PDS-ASSET MANAGEMENT REVIEWED BY: DANEA GEMMELL, PLANNING AND DEVELOPMENT SERVICES DIVISION MANAGER EDGAR J. LOPEZ, CAPITAL PROJECTS DIVISION MANAGER JEAN-MARC PETIT, DIRECTOR OF ENGINEERING AND TECHNICAL SERVICES ISSUE Board of Directors' (Board) authorization is required for the General Manager to execute professional engineering services agreements in an amount greater than $200,000. BACKGROUND The Engineering and Technical Services Department introduced the UV Disinfection Replacement, DP 100012 and UV Hydraulic Improvements, DP 100013 (Project)to the Engineering and Operations (E&O) Committee on December 1, 2020 and to the Board on December 15, 2020, before issuing a formal Request for Proposal (RFP) solicitation to the engineering community. I n those meetings, staff presented a detailed explanation of the drivers and elements associated with the Project as summarized below. Most of the current UV system has been in service for 26 years and requires substantial maintenance, lamp replacement, and frequent chemical cleaning of the UV banks. The UV disinfection system is mainly an electrical and electronic based equipment, most of which has outdated components and technologies. The power of the existing UV lamps cannot be modulated and leads to frequent lamps replacement. The current system equipment has nearly 10,000 lamps and 5,000 ballasts. For wet weather operation, the UV system has an approximate capacity between 90 to 100 million gallons per day(MGD) instead of the March 30, 2021 Special EOPS Committee Meeting Agenda Packet- Page 13 of 23 Page 2 of 11 recommended 127 MGD. This creates a hydraulic bottleneck in the secondary treatment process, limiting the discharge of disinfected final effluent. The Project will evaluate these systems by performing a condition assessment and determining the optimal future disinfection system for Central San.A hydraulic evaluation of the UV disinfection system and final effluent channels will provide potential recommendations to increase disinfection capacity and confirm UV system dosage requirements.A new UV system will improve energy efficiency with state-of-the-art equipment, better and "smarter" controls (i.e., dosage based on UV transmittance and flow) and reduce maintenance time with built-in self-cleaning systems. In addition to the UV technology evaluation, the Project will also evaluate alternative disinfection technologies such as light-emitting diode (LED) UV, ozone, peracetic acid, sodium hypochlorite disinfection, etc. Since both projects are interrelated, staff recommended combining the evaluation, planning, future design, and potential engineering services during construction with one engineering consultant firm to determine the best alternative for Central San. Consultant Selection: On January 11, 2021, a RFP was publicly advertised and seven consulting firms responded with proposals.After evaluating the proposals based on qualifications, statement of approach, staff availability, and understanding of the Project, staff invited four consulting firms to participate in an oral interview. The four consulting firms were Aecom, CDM Smith, Carollo Engineers (Carollo), and Stantec. After the conclusion of a second interview between Carollo and Stantec, Carollo was selected and scored as the top proposer and is, therefore, recommended for the Project. The Project scope of work includes the following tasks: Project Tasks: 1. Condition Assessments: Evaluate and provide a detailed condition assessment of the UV equipment, electrical components, chemical systems and structures for the Project. 2. Disinfection Technologies Evaluation: Evaluate alternative disinfection technologies (i.e., peracetic acid, sodium hypochlorite disinfection, etc.) and determine the optimal future disinfection system for Central San. 3. Hydraulic and Process Evaluations: Complete a hydraulic evaluation of the UV disinfection system and Final Effluent channels to increase disinfection capacity, recommend improvements, and confirm UV system dosage requirements. 4. UV Transmittance and Dosage Testing: Perform the UV transmittance and dosage testing to size a UV disinfection system, if Central San determines that UV disinfection is the best alternative. 5. Business Case Evaluation (BCE)for Future UV System and Hydraulic Improvements: Evaluate installing new UV equipment in the same location or a new disinfection system at a new location. The location selection will consider future potential large projects such as the Nutrient Removal and Water Exchange to avoid stranded assets. 6. Pre-design Report: Prepare 10-percent design of selected alternative, cost estimate, pre- procurement, and pre-selection. California Environmental Quality Act(CEQA) Staff has concluded that this Project is exempt from CEQA under Section 15262 of Central San's CEQA Guidelines, since it allows for further planning and feasibility studies for possible future actions which Central San has not approved, adopted, or funded, and the outcome of these tasks will not have a legally March 30, 2021 Special EOPS Committee Meeting Agenda Packet- Page 14 of 23 Page 3 of 11 binding effect on later activities. Central San will conduct an environmental evaluation of any capital project that is proposed in the future as a result of the tasks authorized herein to determine the need for any additional CEQA documentation. ALTERNATIVES/CONSIDERATIONS 1. The Board may elect to postpone the Project to a future fiscal year. However, this is not recommended as this Project deals with a critical step in the treatment process (disinfection), which is needed to achieve permit compliance and needs to be reliable. This alternative would impact planning and future replacement of the UV system and would likely increase the overall cost to Central San with more maintenance and potential risk with deteriorated equipment. Therefore, this alternative is not recommended. 2. The Board may elect to only perform the condition assessments and not with the design criteria development and other tasks identified in the Carollo scope of work. This alternative would be less cost-effective as the design criteria, BCEs, and other Project tasks are needed to select the appropriate Project(s) approach. Therefore, this alternative is not recommended. FINANCIAL IMPACTS Carollo's total agreement fee for the proposed scope of work is $900,000, which is about three percent of the estimated overall total project costs identified in the Ten-Year Capital Improvement Plan. Final design services and engineering services during construction are not currently budgeted under this agreement at this time. Central San will negotiate those services with Carollo and request approval from the Board as the Project progresses. It is anticipated that the fees for this agreement may reach up to $3.5-4.0 million for the life of the agreement. COMMITTEE RECOMMENDATION The Engineering and Operations Committee reviewed this Project at its meeting on March 30, 2021 and recommended RECOMMENDED BOARD ACTION Staff recommends the following: 1. Authorize the General Manager to execute a professional engineering services agreement with Carollo Engineering, Inc. in an amount not to exceed $900,000 to provide planning and pre-design services for the UV Disinfection Replacement, DP 100012 and UV Hydraulic Improvements, DP 100013. Strategic Plan Tie-In GOAL TWO: Environmental Stewardship Strategy 1—Achieve 100% compliance in all regulations, Strategy 2—Anticipate and prepare for potential regulatory changes GOAL FIVE:Infrastructure Reliability Strategy 1—Manage assets optimally to prolong their useful life, Strategy 2—Execute long-term capital renewal and replacement program GOAL SIX: Innovation and Optimization March 30, 2021 Special EOPS Committee Meeting Agenda Packet- Page 15 of 23 Page 4 of 11 Strategy 2—Improve and modernize operations through technology and efficiency measures ATTACHMENTS: 1. Presentation March 30, 2021 Special EOPS Committee Meeting Agenda Packet- Page 16 of 23 Page 5 of 11 1 ULTRAVIOLET DISINFECTION (UV) REPLACEMENT & UV HYDRAULIC IMPROVEMENTS PROJECTS JEAN-MARC PETIT, DIRECTOR OF ENGINEERING & TECHNICAL SERVICES EDGAR J. LOPEZ, CAPITAL PROJECTS DIVISION MANAGER NITIN GOEL, SENIOR ENGINEER, SPECIAL PROJECTS &ASSET MANAGEMENT GROUP ENGINEERING & OPERATIONS COMMITTEE MEETING MARCH 30, 2021 UV DISINFECTION SYSTEM Secondary Effluent 77:�EEffluenTt,—Disinfected Final Effluent 'annel O UV Inlet Gate (2 total) a © UV Equipment (8 channels) l7ii © Channel Outlet Gates (8 total) Launderers � j " ��:e� a►rM� © Final Effluent Channel Q Q Electrical ��`■�!'" � O Existing Acid Cleaning Tank in UV Building Substt�tion _ UV building OElectrical Substation 17 CFNTPAL SAN March 30, 2021 Special EOPS Committee Meeting Agenda Packet- Page 17 of 23 1 Page 6 of 11 UV SYSTEM BACKGROUND • In 1994, Central San installed 18 banks of UV lamps under the UV Facilities, District Project (DP) 7100, in 6 channels with additional 2 channels and banks added in 2006 under DP 7240. • Fischer-Porter (later Elsag Bailey, then ABB) was the original manufacturer and patent holder. Rights sold several times and now belong to Ironbrook UV. • In 2018, Central San entered a 3-year service agreement ($1 .1 million) with Ironbrook UV to rebuild its equipment. The goal was to enhance the redundancy and reliability of the system until it is replaced. CENTPAL SAN ' 3 EXISTING UV SYSTEM & HYDRAULIC LIMITS • Majority of the UV system, including electrical gear, has been in service for 26 years. • System requires high maintenance due to lack of an automated wiping mechanism. For example, after every 300 hours of operation of a UV bank (i.e., 1 month of operation), 2 maintenance staff crew members dip the UV bank in the UV cleaning tank for chemical cleaning. The total process takes approximately 4 hours per bank (24 banks total). • After lamps reach maximum operating hours (approximately 8,000 hours), many UV lamps are replaced every year. • The hydraulic capacity of the UV system is limited to 90-100 million gallons per day (mgd). • The power for the existing UV system lamps cannot be modulated. UV system has higher energy consumption and shorter lamp life compared to the more efficient and higher wattage per lamp UV systems available today. • Long-term viability is unknown for the current UV parts supplier. 4 CFNTPAI SAN March 30, 2021 Special EOPS Committee Meeting Agenda Packet- Page 18 of 23 2 Page 7 of 11 HYDRAULICS CAPACITY NEEDS TO BE ADDRESSED 260 Maximum Hydraulic Capacity Based cn Current WV TP Operational Practices 190 mgd and 123 mgd 20(f - --190-- - 41 t60 a E 27 0 150 150 u 149 a 23 38 — 113 c' 97 S LEGEND so .Hydraulic capacity by definition JjjjAdditional hydraulic capacity by current WWTP operational practices 0 No.1 Nv.2 No.3 No.4No.5 Nv.6 No.7 Nv.B No.9 N'.10 Na.11 Influent IrPE Channel PE Pumps AIN Park Secondary UV Launders Broad- FE Channel FE Pumps Suisun to Screening Pump. Effluent Weirs Clarifier crested Weir WSE Effluent Weirs aver T7 CENTPALSAW SIGNIFICANT MODIFICATIONS ARE NEEDED IF EXISTING BASINS ARE USED Cenral SAN W E><ahng Canfitggoration 8 Channels 11 mal--- VONpTy[tNa) �— Existing flow split: 1.9 -25% to +50% 08 0.7 0.6 0.5 0.4 0.3 l 0.2 0.1 r 0.0 8.3 mgd(-24%) 120 mgd(+9%) 12.2 mgd(+11%) ..�t 8.3 mgd(-25%) "Iv. =a 16.1 mgd(+46%) 12.2 mgd(+11%) 9.3 mgd(-15%) J�x 9.5 mgd(-14% CFNTPAISAN) 1 6 March 30, 2021 Special EOPS Committee Meeting Agenda Packet- Page 19 of 23 3 Page 8 of 11 DRIVERS FOR UV DISINFECTION REPLACEMENT (DP 100012) & UV HYDRAULIC IMPROVEMENTS (DP 100013) PROJECTS Aging Infrastructure Capacity • Majority of the UV system has Improve current hydraulics been in service for more than 26 years l Sustainability/Optimization O O Regulationp • Energy-efficient improvements I Comply with regulations • Smarter controls (i.e., dosage related to disinfection based on UV transmittance and requirements and continue to flows) adhere to them as they • Easier maintenance-built-in evolve or become stricter in cleaning systems the future • Improve Safety for employees CENTRAL SAN UV DISINFECTION REPLACEMENT (DP 100012) & UV HYDRAULIC IMPROVEMENTS (DP 100013) PROJECTS UV system condition assessment and future disinfectant evaluation will define the best : . .401" disinfection strategy. ,.A, `.''i�► 4W Hydraulic modeling and careful will address hydraulic • , ' f � UV system layout CFNTPAISAN March 30, 2021 Special EOPS Committee Meeting Agenda Packet- Page 20 of 23 4 1.Evaluation of Alter 6.Identify UV System Technologies such as ozone,peracetic 5. Develop UV System Alternatives&Possible acid,&sodium hypochlorite & Hydraulic Locations(Current/Future 2.Perform Hydraulic Evaluation Improvements Design Needs) 3.UV System Condition Assessment Criteria 7.Develop Lifecycle Costs of the Existing UV System 4. UV Transmittance&Dose Testing &Proposed Alternatives 8. Prepare 10% Pre- 9. Develop Pre- 10. Projects Transition Design for the Selected Procurement/Pre- Alternative(s) Selection Package to Final Design sD . CENTRAL SAN ����es�°�cuonl �o�s4 o�2i Q �o s Business Case Evaluation (BCE) . MAE apo L i yv CFNTRAI SAN Page 10 of 11 SCHEDULE 2020--lo-2021 Internal Kick-Off Meeting Nov 17 Project Introduction to E&O Committee Dec 1 Request for Proposal(RFP)Advertisement 1St week of Jan S 1 sc week of Feb RFP Submittal Deadline Interview&Consultant Selection Feb-March Presentation to E&O Committee March 30th Presentation to Board April 15th Notice to Proceed for Consultant * May Planning and Pre-Design May 2021 —April 2022 Final Design(Subject to change) May 2022—May 2023 Construction&Commissioning (TBD) " 'Ek CENTIRAL SAN CONSULTANT SELECTION PROCESS •Received seven •Short listed-Selected and •RFP •Pre-Proposal proposals •Interviewed advertised p with four teams: conducted second Meetings and site interviews: on tours for interested •AECOM PI •Carollo and Stantec parties:nine firms •Carollo Selected M. Consultants Firms that i •CDM Smith Submitted a RFP •Stantec I►ECOM it Carollo Engineers Inc. (Carollo) CDM Smith Greeley and Hansen Hazen and Sawyer HDR Stantec 1 March 30, 2021 Special EOPS Committee Meeting Agenda Packet- Page 22 of 23 6 Page 11 of 11 RECOMMENDED BOARD ACTION Staff recommends the following: Authorize the General Manager to execute a professional engineering services agreement with Carollo Engineers, Inc. for $900,000 to provide planning and pre-design services of the UV Disinfection Replacement, District Project 100012, and UV Hydraulic Improvements, District Project 100013 QUESTIONS? March 30, 2021 Special EOPS Committee Meeting Agenda Packet- Page 23 of 23