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Home My WebLink About05.a. Receive project update and equipment selection process for UV Disinfection Replacement, DP 100012 Page 1 of 9 Item 5.a. CENTRAL SAN June 22, 2022 TO: ENGINEERING AND OPERATIONS COMMITTEE FROM: AMANDA CAUBLE, ASSOCIATE ENGINEER REVIEWED BY: NITIN GOEL, SENIOR ENGINEER EDGAR J. LOPEZ, CAPITAL PROJECTS DIVISION MANAGER JEAN-MARC PETIT, DIRECTOR OF ENGINEERING & TECHNICAL SERVICES ROGER S. BAILEY, GENERAL MANAGER SUBJECT: RECEIVE PROJECT UPDATE AND ULTRAVIOLET (UV) EQUIPMENT SELECTION PROCESS FOR THE UV DISINFECTION REPLACEMENT, DISTRICT PROJECT 100012 In 1994, Central San installed 18 banks of UV lamps under the UV Facilities, District Project (DP) 7100 in six channels to replace gaseous chlorination disinfection system for the plant effluent. Fischer-Porter was the original manufacturer and patent holder. Rights were sold several times, first to Elsag Bailey, then ABB, and now belongs to Ironbrook UV, with a patent held by Trojan Technologies of Canada. 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. For wet weather operation, the UV system has a capacity of approximately 90 to 100 million gallons per day. To date, the UV Disinfection Replacement, DP 100012 (UV Project) performed a condition assessment of the existing UV disinfection system and evaluated alternative state-of-the-art disinfection technologies such as LED UV, ozone, peracetic acid, sodium hypochlorite disinfection to determine the optimal disinfection system for Central San. Based on a comprehensive evaluation, continuing with UV disinfection technology was determined as the best path forward. Siting the new UV disinfection system adjacent to the south clarifiers provides multiple benefits. First, it frees the existing UV areas for future secondary capacity needs that may arise due to future regulations such as nutrient removal. Second, it alleviates the existing hydraulic bottleneck in the secondary treatment plant, limiting the discharge of disinfected final effluent during the peak wet weather events. After confirming with the Operations and Maintenance staff that UV disinfection technology is the optimal disinfection technology, Carollo Engineers, Inc. (Carollo), the design engineer, was tasked to prepare a business case evaluation summarizing the basis of design criteria and comparing the leading UV equipment manufacturers based on non-economic and economic criteria (capital, operation and maintenance and lifecycle costs). Central San staff and Carollo also visited two treatment plants in California: Olivenhain Municipal Water District (Wedeco Duron) and City of Paso Robles (Trojan Signa)to gather useful information about the state-of-art UV disinfection systems. As a next step of the UV Project, Carollo is developing the equipment selection package that consists of June 22, 2022 EOPS Regular Committee Meeting Agenda Packet- Page 17 of 27 Page 2 of 9 technical drawings and specifications for the shortlisted UV equipment manufactures. The shortlisted UV equipment manufactures were determined by performing the business case evaluation, including the inputs of Operations and Maintenance staff, and using the best fit for Central San's treatment plant. Carollo's recommendation to pre-select the UV equipment is needed and brings advantages to the UV Project, as follows: • Construction drawings and specifications will be based on the actual equipment • There are some differences in the electrical requirements between the two UV manufacturers, designing around one UV manufacturer reduces complexity of the design and potentially design fees • Utilizing 3D model will detect conflicts, confirm access, and maintain operation during construction • Improve cost estimates • Reduce change orders Staff will meet and continue consultation with Legal Counsel to review the selection process and ensure that selection complies with public procurement code. The UV equipment will be selected by soliciting bids from UV suppliers based on a pre-selection and procurement solicitation. The request for bids will be posted on Central San' s website, the submittals will be reviewed against pre-established pass/fail status criteria and those manufacturers that meet these criteria will move on to the low bid selection. Final selection of this equipment will be based on a present worth analysis of capital and select operational costs (i.e. electrical costs). The first purchase order will be issued to the manufacturer for the cost of up- front engineering and shop drawings preparation. Subsequent purchase orders will be issued to the manufacturer after completing various milestones defined in the selection documents. Selection documents are anticipated to be advertised in July 2022, and submittals received in August 2022. Stratedc Plan Tie-In GOAL TWO:Environmental Stewardship Strategy 2—Anticipate and prepare for potential regulatory changes GOAL FIVE:Infrastructure Reliability Strategy 2—Execute long-term capital renewal and replacement program ATTACHMENTS: 1. Presentation June 22, 2022 EOPS Regular Committee Meeting Agenda Packet- Page 18 of 27 Page 3 of 9 =moi_ ULTRAVIOLET DISINFECTION (UV) REPLACEMENT PROJECT UPDATE — MAJOR EQUIPMENT SELECTION 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 JUNE 22, 2022 UV SYSTEM BACKGROUND • In 1994, Central San installed 18 banks of UV lamps under the UV Facilities, District Project (DP) 7100 in 6 channels. • In 2006, another 6 banks were added under the UV Expansion, DP 7240 in 2 additional channels. • Fischer-Porter (later Elsag Bailey, then ABB) was the original manufacturer and patent holder. The rights sold several times and now belong to Ironbrook UV in Canada. June 22, 2022 EOPS Regular Committee Meeting Agenda Packet- Page 19 of 27 1 Page 4 of 9 EXISTING UV SYSTEM - OPERATE UP TO 10,000 (60 WATT) LAMPS t ' 3 DRIVERS FOR UV DISINFECTION REPLACEMENT (DP 100012) Aging Infrastructure Capacity • UV system has been in service ;/ O f, • Review process improvements for more than 26 years • or optimizations to gain capacity • Staff has excelled at keeping • Addressing hydraulic bottleneck system updated and to increase capacity to 127 operational million gallons per day Sustainability/Optimization O O Regulations • Energy-efficient improvements 0 Comply with regulations • Smarter controls(i.e.dosage related to disinfection based on UV transmittance and rte_ requirements and continue to flows) adhere to them as they • Easier maintenance- built-in -.00001. evolve or change in the cleaning systems future CFNTPAISAN ' a June 22, 2022 EOPS Regular Committee Meeting Agenda Packet- Page 20 of 27 2 1.Evaluation of Alternative Disinfection 6.Identify UV System Technologies such as ozone,peracetic 5. Develop UV System Alternatives &Possible acid,&sodium hypochlorite &Hydraulic Locations 2.Perform Hydraulic Evaluation Improvements Design 7.Develop Lifecycle Costs 3.UV System Condition Assessment Criteria of the Existing UV System 4. UV Transmittance&Dose Testing &Proposed Alternatives 8. Prepare 10% 9. Develop Predesign for the Procurement/Pre- 10. Project Transition Selected Alternative(s) Selection Package to Final Design DISINFECTIONEVALUATED MULTIPLE • • Criteria UV Disinfiction Soc,;:m O Bacterial.Compliance Reliable Reliable Soli, Pathogen Disinfection Robust Good Good Formation potential of None High ModeraTe regulated Hypochlorite DBPs DechlorinationChemical Destruction None Good Robust Potential forincreasing None High Low Low effluent toxicity a' Post-Treatment None RequiredProven Accepted Monil Methods Proven Proven Proven Reliable Supply of Yes Yes Yes Limited ChemicaliParts Applications in Proven Proven LimitedSecondary Effluent Broad Regulatory Yes Yes, VMS, No, 1Limited Acceptance Relative Overall Cost Low CFNTRAI SAN 1 •' -• • • �•- •. '.•- • Page 6 of 9 INCLINED UV LAMP ORIENTATION IS STATE-OF-THE-ART TECHNOLOGY f� TIf Trojan Wedeco � 7 PROPOSED UV SYSTEM LOCATION AND FLOW PATH REMOVES HYDRAULIC BOTTLENECKS i05ataSuv esYPE N•fll MgaE llY SIxUCEVYE esms.•-- auxcnax �!§ e . _ wwow FECMMMFL SIPUC,YPF% E ��nlEEasEYErrr �X000-001& EP � lelT.Nel eY Fr•• 1 eseweln Fre F E�CONPE Y is 9ECQg .CLARFAw Cf¢ 7N8� 1ti E Jq - �w E%IETING >x�unOx SF i PUYPSI4TGNnupw weI L WFT WELL YYe NEW ' • • OUT OO our of sEmrCe 8 CFNTPAISAN June 22, 2022 EOPS Regular Committee Meeting Agenda Packet- Page 22 of 27 4 Page 7 of 9 CONCEPTUAL LAYOUT v ' 9 BUSINESS CASE EVALUATION LOOKED AT MULTIPLE FACTORS • Capital Cost ,l__. • Reliability / Successful Track Record �;;;,��,° • Local Support / Spare Parts Availability • O&M Parts Replacement and Energy Costs • Features and Benefits • O&M Ease (Labor) • Headloss through UV CFNTPAISAN June 22, 2022 EOPS Regular Committee Meeting Agenda Packet- Page 23 of 27 5 Page 8 of 9 EQUIPMENT SELECTION PROCESS • UV equipment will be selected by soliciting submittals from suppliers based on a formal request for bids ' • Qualifications will be reviewed against pre-established - pass/fail status criteria and those manufacturers that meet these criteria will continue on to the low bid =��C0STA selection 4N0EE 1Md5MEtTpN EMX MEM °LTItaNF%ETpSNFECSgN RER0.E8AEt1I PRQIELT D18TldCFPRWEC11p.10°01l • Final selection will be based on a present worth101 analysis of capital and operational costs (i.e. electrical REO➢ESTF°R PR°P05 E5 costs) using a low-present worth selection • A purchase order for the engineering and shop drawings will be issued to the vendor JunnldZ],G1'rfomo PE No.38YA.liorolbbe�wd iq EN0u5.0emflq dpnWKzu. • The selection contract and procurement contract will have options to assign contract to the general contractor or pre-purchase by Central San CIFINTPAISAN SCHEDULE Year 2021-22 Year 2023 July June my-Au opt-Oc ov-De Jan Sept 2021 2022 2022 2022 2022 2023 2023 Today Planning 10%Design Equipment Board Execute Final Complete Start Submittal Request for Approval of Equipment Design Final Bids Equipment & NTP Design & Contract Final Selection & Design Final Design Agreements June 22, 2022 EOPS Regular Committee Meeting Agenda Packet- Page 24 of 27 6 Page 9 of 9 SCHEDULE • July 2021-June 2022: Planning level efforts — disinfection technology evaluation, data collection, operations and maintenance plant tours, hydraulic modeling and business case evaluation • July 2021-August 2022: UV equipment selection and finalize final design contract with Carollo Engineers, Inc. • September 2022-June 2023: Final design • Beyond 2023: Construction and Commissioning ' 13 QUESTIONS? ' 14 CFNTPAISAN June 22, 2022 EOPS Regular Committee Meeting Agenda Packet- Page 25 of 27