Central Reservoir Replacement. Project Update. Planning Committee March 14, 2017

Transcription

1 Central Reservoir Replacement Project Update Planning Committee March 14, 2017

2 Agenda Project Location and Setting Project Objectives Central Pressure Zone Preferred Project Construction Overview Site Plan Haul Route Schedule and Cost Next Steps 2

3 Project Location 3

4 Project Setting Central RCS

5 Project Scale Central RCS

6 Replacement Project Objectives Remove PCBs from liner materials. Downsize aging open-cut reservoir. Size to meet future demands. Address maintenance issues and concerns. Improve system hydraulics and maintain water quality. Remove from DSOD jurisdiction. Increase operational flexibility and reliability. Minimize environmental impacts and disruption to the community. Minimize costs to customers.

7 Central Pressure Zone 239-ft 215-ft 219-ft 222-ft 222-ft 181-ft 184-ft 201-ft 177-ft 150-ft North Reservoir San Pablo Clearwell Central Reservoir Dunsmuir Reservoirs South Reservoir

8 Central Pressure Zone 239-ft 215-ft 219-ft 222-ft 222-ft 181-ft 184-ft 201-ft 177-ft 150-ft North Reservoir San Pablo Clearwell Central Reservoir Dunsmuir Reservoirs South Reservoir

9 Central Pressure Zone 239-ft 222-ft 222-ft 222-ft 184-ft 181-ft 184-ft 215-ft 219-ft 177-ft North Reservoir San Pablo Clearwell Central Reservoir Dunsmuir Reservoirs South Reservoir

10 Central Pressure Zone 239-ft 222-ft 222-ft 222-ft 181-ft 184-ft 215-ft 219-ft 177-ft North Reservoir Multiple reservoirs and wider 184-ft Central Reservoir operating level will improve: San Pablo Central Clearwell System Reliability Reservoir Outage Planning Water Quality Dunsmuir Reservoirs South Reservoir

11 Project Alternatives One, Two and Three Tank Configuration Eleven construction methods to strengthen soil beneath existing reservoir and new fill pad Three different tank construction methods/materials Four different roof types

12 Recommended Project Demolish existing 154 MG reservoir. Properly dispose of hazardous materials. Improve the existing foundation with Cement Deep Soil Mixing. Build a 30-foot-thick fill pad consisting of cement or lime treated soil. Construct three new 17 MG concrete tanks within the existing basin, totaling approximately 50 MG. Replace Central Rate Control Station.

13 Construction Overview 13

14 Conceptual Site Plan 14

15 Construction Overview CDSM at Chabot Dam Summit Reservoir Replacement Berryman Grading Reservoir at Summit Demolition Reservoir 15

16 Truck Route Will Use I

17 Project Schedule and Cost Phase Date Site planning/outreach 2017 CEQA Design Construction Total Project Cost = $121 Million

18 Next Steps Consultant Agreement March 2017 Community Meetings Summer/Fall 2017 Notice of Preparation Winter 2018 Draft EIR Spring 2019 Public Comment Period Spring 2019 Final EIR - Board Certification Fall 2019

19 Questions?

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21 Semi Annual Water Quality Report Planning Committee March 14, 2017

22 Drinking Water Standards The District met all Federal and State drinking water standards in 2016

23 Water Quality Goals The District strives to meet all water quality goals Calendar Year 2016 exceeded 8 of 119 water quality goals Disinfection Byproducts TTHMs HAA5 NDMA NDEA Bromate Other Total coliform Customer complaints Filter startup turbidity

24 Disinfection Byproducts Increase in raw water precursors Warmer temperatures Need higher chlorine dose at treatment plants to maintain residuals in distribution system Must balance disinfection and residual maintenance with DBP formation

25 THMs from Inline Plants 80 TTHMs in Effluent of Inline Plants, Jun Dec TTHMs, ug/l Jun-11 Nov-11 May-12 Nov-12 May-13 Nov-13 May-14 Nov-14 Jun-15 Nov-15 May-16 Nov-16 Laf Eff Or Eff WC Eff

26 Chlorine in Distribution System Chlorine Residuals from TCR Taps, Percent of Samples Partnership for Safe Water Goal = 95% >=0.5 mg/l 100% Mok source Average Cl2 residual, mg/l and % Mok source SWTR requirement = no more than 5% ND Jan-12 Apr-12 Jul-12 Sep-12 Dec-12 Apr-13 Jul-13 Oct-13 Dec-13 Apr-14 Jul-14 Oct-14 Dec-14 Apr-15 Jul-15 Oct-15 Jan-16 Apr-16 Jul-16 Sep-16 Dec-16 Apr-17 Jul-17 % of samples with Cl2 >=0.5 mg/l % of samples with Cl2<0.05 mg/l (ND) Monthly Average Cl2 residual, mg/l percent Mok source (OR, Laf, WC)

27 Filter Backwash Recovery Turbidity goal: <0.1 NTU within 15 minutes 12 of 5,147 filter runs did not meet goal 6 occurrences at Orinda WTP Mar Briones draft, aqueduct treatability issues Remaining 6 at other plants Equipment failures, manganese, sediment

28 Distribution System Water Quality Large, complicated distribution system with hundreds of sites and components Too much storage, very high water age in many areas Chlorine residual decays over time, particularly in water from conventional plants Increase number of reservoirs manually treated from an average of 14 per year to over 70 in 2016

29 Reservoir Treatments 18 Number of Reservoirs Treated each Month, Jan-10 Apr-10 Jul-10 Oct-10 Jan-11 Apr-11 Jul-11 Oct-11 Jan-12 Apr-12 Jul-12 Oct-12 Jan-13 Apr-13 Jul-13 Oct-13 Jan-14 Apr-14 Jul-14 Oct-14 Jan-15 Apr-15 Jul-15 Oct-15 Jan-16 Apr-16 Jul-16 Oct-16 Jan-17

30 Distribution System Water Quality Initiatives FY17-19 Plan Chloramine booster stations; one installed, two more planned Remove reservoirs from service whenever possible, approximately 40 currently out Filled 3 Water System Inspector positions Proposed a new Supervisor for FY18 Install online analyzers for better data collection and faster response times Install additional mixers in key reservoirs Test innovative UV treatment system

31 Lead Water Quality Initiatives Regulatory monitoring (LCR) in 2017 Voucher program for customers, lead tap sampling Inventory and replacement of lead service lines Sampling in schools for lead

32 DBP Reduction Initiatives Minimize disinfectant doses whenever possible Additional monitoring equipment TOC and THM analyzers at treatment plants ph adjustment at inline plants Granular activated carbon investigations Improve precursor removal with pretreatment Reduce water age

33 Upcoming Regulatory Issues Revised California Total Coliform Rule EPA six-year review will cover Surface Water Treatment Rule Potential to change detectable residual Focus on pathogens in distribution systems EPA is revising the Lead and Copper Rule, California is updating state rule in 2018 New California MCL for 1,2,3-TCP UCMR-4 monitoring

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35 Semi-Annual Regulatory Compliance Update Planning Committee March 14, 2017

36 Agenda Reporting Period: September 1, 2016 through February 28, 2017 Enforcement actions Wet weather operations Leak detection near creeks Workplace health and safety Upcoming activities 2

37 Enforcement Review Strategic Plan KPI = Zero NPDES and Waste Discharge Requirement (WDR) permit Notices of Violation (NOVs) received This reporting period 1 NOVs for NPDES or WDRs 5 NOVs for air permits 3

38 Notices of Violation Camanche South Shore WWTP Insufficient reporting Future reports will include tabular and graphical data Inadequate discussion of groundwater compliance Completing a detailed technical review of groundwater impacts from the WWTP ponds 4

39 Notices of Violation (continued) Orinda WTP Exceeded DCBM limits on 4 occasions in 2015 DCBM is a disinfection byproduct Resulted from chlorination of supplemental supply Paid $6,000 mandatory minimum penalty 5

40 Notices of Violation (continued) Main WWTP Air Permit Exceeded hydrogen sulfide limit 4 times in digester gas Future settlement with BAAQMD is expected New limit changed from 340 ppm instantaneous to 200 ppm annual average 6

41 Notices of Violation (continued) Mokelumne River Fish Hatchery Fuel Dispensers Air Permit Vapor recovery system test July 31 deadline Completed and passed on September 9 Paid $450 civil penalty Added to compliance calendar 7

42 Wet Weather Operations Three Sanitary Sewer Overflows (SSOs) Oakport WWF chlorinated discharge Point Isabel WWF total coliform violation San Antonio Creek WWF unauthorized discharge 8

43 Wet Weather Operations Response Review all WWF SOPs by 6/30/17 Evaluate alternative disinfection methods Inspect outfall diffusers for obstruction Audit WWF training program Annual review of WWF operation Conduct training and exercises twice/year Utilize incident command system Evaluate physical and operational changes to overflow structures 9

44 Detecting Leaks Near Creeks Goal: Protect creeks by detecting leaks before they become main breaks Ranked each creek by known or likely fish species 938 pipes 12 inch and crossing or near a creek Developing strategy balancing risk, technology limits, and resources 10

45 Lost Time Injury Rate

46 Upcoming Activities SWRCB Water Quality Enforcement Policy revisions Submit technical report for CASS and CANS WWTP on groundwater impacts Procure replacement portable diesel engine generators/pumps Participatory team ergonomics guide

47 Promoting Tap Water with CAP Outreach Plan March 14, 2017

48 2016 Opinion Research EBMUD maintains a favorable brand rating and has strong ratings in their core competency: safe, reliable, and good tasting water. The vast majority of customers have positive perceptions of local water quality, and use of bottled water for drinking is decreasing. However, one demographic segment had a increased likelihood of drinking bottled water. 2

49 Drinking Water Behaviors Customers without a college degree, particularly renters, are more likely to drink bottled water. Question: For drinking water in your home, do you mostly use: 3

50 Drink Tap Outreach While Emphasizing Our Core Competency: Safe, Reliable, Good Tasting Tap Water Fill in knowledge gaps and increase tap water consumption: Water Quality + DrinkTap + Customer Assistance Program The Plan Annual Water Quality Report: Received May/June ClearChannel Bus Shelters: Displayed May-June Promotional Items: Water bottles District Communications: Customer Pipeline, Social Media, Presentations 4

51 Annual WQ Report Postcard or bill insert mails to all addresses in the service area Ebmud.com/wqr 5

52 Bus Shelter Campaign Displayed May-June. Utilizes credits from District/ClearChannel lease agreement. CAP enrollment heat map Featured on bus shelters along major transit routes from Ward 1, 4, 5, 6, 7. Follows CAP enrollment heat map. Promotes bill payment assistance programs. 6

53 Bus Shelters 7

54 Additional Outreach Promotional Items: Stainless steel water bottles Pens (dependent on funds) In District Communications: Customer Pipeline May/June Social Media: Twitter, Nextdoor Website REPLACE WITH PHOTO Of BOTTLE MOCKUP 8

55 Questions? More information at: Construction at We also post on: Working Every Minute 9

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