Main Wastewater Treatment Plant Odor Control Program Update. Planning Committee October 9, 2018

Transcription

1 Main Wastewater Treatment Plant Odor Control Program Update Planning Committee October 9, 2018

2 Agenda Key Performance Indicator (KPI) Capital Investments Improvements to Operational Practices Odor Management Team Accomplishments Next Steps 2

3 Achieved KPI in FY18 30 odor complaints near the MWWTP 3

4 FY18 Odor Sources 4

5 FY18 FY22 Wastewater CIP $23 million budgeted for Odor Control 5

6 Influent Pump Station (IPS) Odor Control Improvement Project Replaces 16-year-old single stage carbon scrubbers $9.7 M project New two-stage system in start up phase Biotrickling filters followed by carbon polishing 6

7 Additional Projects R2 Facility Odor Control Upgrade $2.8 M project Upgrades existing dual-stage biofilter/carbon system with larger biofilter Primary Sedimentation Tanks $9.0 M project Re-evaluating project based on odor investigation findings 7

8 Operational Enhancement Secondary Clarifiers Updated procedure to take clarifier out of service to reduce duration of outage In-Service Clarifier Flushing solids from a Clarifier being taken out of service. 8

9 Great Results This Summer! Took 14 out of 16 clarifiers out of service for inspections Improved procedure resulted in NO odor complaints attributed to clarifier outages! Spraying down odorous materials from rings of clarifiers. 9

10 Additional Improvements Timely change out of media in odor control systems better monitoring Focused attention on primary weirs Replacing failed pipe to provide chemical dosing in South Interceptor Water spray on weirs (as shown on right) helps reduce odors. 10

11 Odor Management Program Team One of three District-wide Values Teams Focus on public outreach, Department culture change, O&M practices, and capital upgrades Improved process in FY18 for taking clarifiers out of service Participated in April 25, 2018 West Oakland Liaison Group Meeting 11

12 Next Steps Continue vigilance to minimize odor generation in all activities (O&M, Construction, etc.) Continue open dialogue with our neighbors in West Oakland Implement Capital Improvement Program Identify opportunities to optimize current practices to reduce odor potential, including focus on impacts from interceptor rehab projects 12

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14 Wet Weather Program Management Update Planning Committee October 9, 2018

15 Agenda Review of Wastewater System Operation during Wet Weather Summary of Improved Approach to Ensuring Wet Weather Readiness Recap of 2017/2018 Season Performance Next Steps 2

16 Wastewater Interceptor System EBMUD: 29 miles of gravity interceptors 8 miles of force mains 15 pump stations Main Wastewater Treatment Plant (MWWTP) 3 Wet Weather Facilities (WWFs) 5 overflow structures Satellites: ~1,600 miles of regional collection system Property Owners: ~1,600 miles of private sewer laterals 3

17 Wet Weather Facilities (WWFs) Point Isabel (N. Interceptor) Provides ~ 1 million Oakport gallons of storage (S. Interceptor) San Antonio Creek (S. Interceptor) No storage; least utilized Provides ~ 3 million gallons of storage 4

18 Key Elements of Improved Wet Weather Program Management Enhanced WWF training program Documented best practices and updates to Standard Operating Procedures (SOPs) Implemented options for proactive flow management Implemented organizational improvements and enhanced coordination 5

19 2017/2018 Season Rainfall Total Rainfall (inches) Month 2016/2017 Season 2017/2018 Season October November December January February March April TOTAL

20 Success! All regulatory requirements were met at all wastewater facilities throughout the 2017/2018 wet weather season 7

21 Key Areas of Success WWF training program Use of Incident Commander during the more intense storms Multiple Table Top Exercises Wet Tests at WWFs during dry periods Pre-storm coordination meetings 8

22 Areas for Improvement Balance staffing resources for plant operational needs with WWF refresher training Ensure completeness and clarity of WWF preoperational checklists Maintain go-to boxes at WWFs 9

23 Areas for Improvement (cont.) Increase pool of Supervisors for operation of San Antonio Creek WWF Document each storm s key lessons learned within 48 hours of the storm Ensure Operators know how to get to and operate Pump Station (PS) Q 10

24 Additional Accomplishments Completed study to explore alternatives to existing disinfection/dechlorination systems at the WWFs Completed first Wet Weather Program Annual Readiness Report for Regional Water Quality Control Board 11

25 Next Steps Maintain readiness mindset Provide WWF refresher training through the season Conduct wet tests during extended dry periods Conduct table top exercises Maintain continuous improvement mindset 12

26 Wastewater Energy Generation Update Planning Committee October 9, 2018

27 Agenda Background Power Generation Station (PGS) Electricity Generation Update Turbine History Turbine Extended Service Agreement Next Steps Power Generation Station (PGS) 2

28 Background PGS consists of: Three engines at 2.1 MW each (installed in 1985) One turbine at 4.5 MW (installed in 2011) Total capacity = 11 MW Engine Installation (1984) Excess electricity is sold to Port of Oakland Turbine 3

29 PGS Electricity Generation PGS Expansion (new 4.5-MW turbine) Current Production ~130% of Demand Start of Resource Recovery Program Pre-Turbine Production ~80% of Demand Fiscal Year 4

30 Turbine Benefits Increased electricity generation capacity Lower air emissions than engines Improved efficiency vs. engines Energy independence Improved plant reliability 5

31 Turbine History Operations began in November 2011 Increased down time in Approximately 132 days, 20 percent of the time Multiple episodes of fuel injector failures, leading to turbine blade damage Damaged Fuel Injector Damaged Turbine Blade 6

32 Turbine History, cont d Manufacturer replaced fuel injectors with a different design and overhauled the turbine District opted to enter into an Extended Service Agreement (ESA) with the manufacturer to forestall future turbine damage and downtime ESA coverage began in November

33 Turbine ESA The ESA provides: Semi-annual inspections and maintenance On-call trouble-shooting by manufacturer Replacement of covered parts at no charge Overhaul (approximately 50 percent of the cost of the ESA) Performed in December 2013 and December

34 Benefits of the ESA Improved performance: 20 percent increase in total electricity generation post-esa Increased Reliability: Operating over 95 percent of the time post-esa Prompt service: Manufacturer alerts District to problems, on-site the next day Proactive resolution of problems: Fuel injector fouling detected and resolved Insurance: Fouled Fuel Lines Diagnostic and repair services for unanticipated problems at a lower cost 9

35 ESA Alternatives No third party alternative Alternatives from Solar Turbines: Limited coverage, similar overall price Overhaul not included More downtime, even in best case Greater risk District staff unable to perform equivalent service 10

36 Power Generation Costs and Outlook Costs to operate PGS have grown over time, due in part to the cost of the ESA Rate for electricity sales has decreased, and is anticipated to drop further in the future Power purchase agreement with Port of Oakland ends in October 2022 If we extend the ESA, the term would end in November 2023 District has the option to cancel the ESA with 90 days notice Exploring additional biogas utilization options, including vehicle fuel 11

37 Next Steps Finalize the proposed ESA terms with Solar Turbines Present the ESA to the Board for consideration on November 13, 2018 Continuous coverage is critical to turbine performance and electricity generation 12

38 Thank you! 13

39 The Los Vaqueros Expansion Project Planning Committee! October 9, 2018

40 Agenda Background Project Funding Project Governance Evaluating EBMUD Participation in LVE; Objectives & Goals Next Steps Questions & Comments 2

41 LVE Project Background LV is expanded to 160 TAF - EBMUD WSMP 2040 considers future participation CCWD approaches partners about potential expansion to 275 TAF - Board approves Principles of Agreement with CCWD for Potential Use of Freeport and Los Vaqueros Facilities - $100,000 cost share agreement Draft Supplement to EIS/EIR released 3

42 Options for EBMUD Participation 1. EBMUD stores water in in the reservoir during wet years for use during dry years - Could be from Mokelumne River or other sources - Deliveries to EBMUD from raw or potable interties or Freeport exchange and/or 2. EBMUD uses Freeport Facilities and Mokelumne Aqueducts to convey water to Los Vaqueros for project partners 4

43 LVE Environmental Documents Final Supplement to the EIS-EIR complete by November 2018 Draft Federal Feasibility Report in February 2018 CCWD CEQA action anticipated May 2019 Federal Record of Decision expected December

44 Project Funding In July, the California Water Commission awarded LVE $459 million in State funding - Half of estimated total project cost of $918 million - Includes $13.65 million in early funding CWC funding supports public benefits of project - About half of water deliveries will go to south of Delta wildlife refuges 6

45 EBMUD Cost Share EBMUD is currently allocated 30 TAF of storage, but only uses water during droughts or emergencies CCWD is evaluating costs for 15 project partners EBMUD share will depend on: - EBMUD s share of project benefits - The facilities that EBMUD uses - Number of project partners Cost calculation will recognize EBMUD s shared assets, including Freeport, Mokelumne Aqueducts, and related facilities 7

46 Project Governance Evaluating a Joint Powers Authority (JPA) JPA formation scheduled for mid-2019 with project responsibilities transferring from CCWD to the JPA Currently negotiating Multi-Party Agreement to cover costs through December

47 EBMUD Participation Objectives Consistent with existing Principles - February 2016 Principles of Agreement with CCWD - January 2017 Principles for Use of Unassigned Capacity in Freeport A strong guarantee of availability of water EBMUD maintains full ownership, control over its facilities Cost share based on Beneficiary Pays approach - EBMUD doesn t pay for assets it doesn t use - EBMUD compensated for its shared assets 9

48 EBMUD Participation Objectives Project governance structured to preserve EBMUD s guaranteed supply Participation in the project must not adversely impact EBMUD s water rights (including dry year CVP contract) EBMUD is not interested in selling Mokelumne River water to partners Project must be cost effective relative to other water supply projects 10

49 Next Steps Agreement with Reclamation clarifying that participation does not affect CVP contract trigger Environmental Documentation - Final SEIS-SEIR - November 2018 Multi-Party Agreement this fall JPA negotiation - decision point in Spring

50 Questions & Comments 12

51 Project Governance Agencies that signed Cost Share Agreement: 1. East Bay Municipal Utility District 2. Contra Costa Water District 3. Alameda County Water District 4. Zone 7 Water Agency 5. Bay Area Water Supply and Conservation Agency 6. Byron-Bethany Irrigation District 7. City of Brentwood 8. Grassland Water District 9. East Contra Costa Irrigation District 10. San Francisco Public Utility Commission 11. San Luis & Delta Mendota Water Authority 12. Santa Clara Valley Water District 13. Del Puerto Water District 14. San Luis Water District 15. Westlands Water District 13

52 Photovoltaic Update October 9, 2018 Planning Committee

53 Overview Photovoltaic (PV) projects are integral to District s overall renewable energy strategy Ten net-metering PV projects with up to 2 MW of capacity on-line by late 2018 Up to 10 MW could be implemented under PG&E s RES-BCT Tariff 2

54 Camanche 380 kw PV Project Executed Power Purchase Agreement (PPA) with SolarCity (Tesla) 15-year fixed price Purchase options at 5 year increments Net Energy Metering Aggregate Energy credited to Mokelumne Fish Hatchery, Camanche Reservoir oxygenation system, and local water/wastewater treatment plants supporting recreation 3

55 Camanche Construction Schedule Ground breaking: September 24, 2018 On line: Early

56 Large PV Project Three watershed property sites explored Duffel (City of Orinda, Bear Creek Road) Navy Flat (Alameda County, north of Redwood Canyon Golf Club) Shuteman (Contra Costa County) 5

57 Large PV Project (RES-BCT Tariff) Local governments and special districts Renewable projects: PV, wind or hydro Maximum project size: 5 MW Program cap: 105 MW Apply generation credit to remote locations 6

58 Project Update District s projects beginning CEQA and local land use agency review. Effort focusing on Duffel (Orinda) and Navy Flat (Alameda Co.) Cost to date: $350,000 Net present value if remaining two sites implemented: $9 17 million 7

59 Duffel Site 8

60 Next Steps - Duffel Site District completes City of Orinda General Plan consistency analysis District analyses potential viewshed impacts and mitigation City of Orinda makes consistency determination and vets with City Council Continue public outreach and CEQA 9

61 Navy Flat Site 10

62 Next Steps Navy Flat District submits Pre-Application for Land Use Permit Review/Analysis by County Staff for consistency with Measure D and General Plan Present to Castro Valley MAC MAC recommendation to the Board of Zoning Adjustments Continue public outreach and CEQA 11

63 QUESTIONS? 12