Recycled Water Master Plan Update. Planning Committee September 13, 2016

Transcription

1 Recycled Water Master Plan Update Planning Committee September 13, 2016

2 Agenda Background Current water recycling goal Potential for potable reuse Outline of Master Plan Update Schedule 2

3 Background First Water Recycling Master Plan 1991 Water Supply Management Program 1993: 14 MGD by 2020 water recycling goal Urban Water Management Plan: Project implementation schedule update Water Supply Management Program 2040: 20 MGD by 2040 goal, master plan updated in

4 Current Goal: 20 MGD by 2040 (Non-potable) Project & location Current Projects (9 MGD of Capability) Average yield (MGD) San Leandro Recycled Water Project, Alameda County 0.3 Irrigation East Bayshore Recycled Water Project, Phase 1A, Alameda County Water use 0.5* Irrigation, office building toilet flushing Recycled Water Truck Program 0.02 Dust control, construction, irrigation San Ramon Valley Recycled Water Project, Phase 1, Contra Costa County North Richmond Water Reclamation Plant, Contra Costa County Richmond Advanced Recycled Expansion Water Project, Contra Costa County Project Under Construction (0.7 MGD) 0.7 Irrigation SRVRWP Phase Irrigation Proposed Future Projects (10.4 MGD) RARE Expansion, Contra Costa County 1.5 Industrial Phillips 66, Contra Costa County 3.7 Industrial North Richmond Expansion, Contra Costa 1 Industrial SRVRWP Phases 3 & 4, Contra Costa County 0.9 Irrigation SRVRWP Phases 5 & 6, Contra Costa County 0.4 Irrigation 4 Industrial cooling towers, Chevron Richmond Refinery 3.5 Industrial boilers, Chevron Richmond Refinery East Bayshore Phases 1B & 2, Alameda County 1.8 Irrigation, commercial San Leandro Recycled Water Project Expansion, Alameda County 0.5 Irrigation Satellite Recycled Water Projects, Contra Costa County 0.6 Irrigation Reliez Valley Recycled Water Project, Contra Costa County TBD Irrigation 4

5 Future Recycled Water Projects (Non-potable) 5

6 Consider Potable Reuse (District Strategic Plan) Direct Potable Reuse (DPR) Highly purified recycled water introduced into the raw water supply feeding a water treatment plant or into the distribution system Indirect Potable Reuse (IPR) Highly purified recycled water introduced into an environmental buffer (groundwater or surface water) before being further treated for potable use 6

7 Potential for Potable Reuse Recent droughts: - Importance of reliable, local supply - More public acceptance of water recycling Proven track record of indirect potable reuse/groundwater recharge WateReuse studying potable reuse (direct and indirect/surface water reservoir augmentation) Regulations to be developed (DPR & IPR/SWA) Could increase EBMUD s water recycling goal 7

8 Potable reuse projects in CA: - 8 permitted (IPR/GWR) - 17 planned (IPR/GWR) - 3 planned (IPR/SWA) 8

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10 Local Potable Reuse Studies Oro Loma Sanitary District - Reservoir augmentation - Groundwater injection - Direct reuse Central Contra Costa SD - Connection to EBMUD aqueducts/reservoir augmentation - Direct reuse Upper San Leandro Reservoir SD-1 - Evaluate options for treatment improvements, including potential for potable reuse 10

11 Master Plan Update Outline Evaluate potable reuse District-wide - Information in studies already prepared (Oro Loma, Central San) - Additional evaluations (IPR/DPR) in service area (SD-1, San Leandro, Richmond, Pinole/Rodeo, BARR, etc.) - WateReuse research results - New regulations for IPR/SWA and DPR - Project layouts (treatment, conveyance) and hydraulic models - Project operations - Technical challenges and potential solutions - Project costs and implementation timeline - Outreach needs and develop roadmap - Comparison to non-potable reuse options - Recommendations 11

12 Master Plan Update Outline Update evaluation of non-potable reuse - Future expansions of East Bayshore, San Ramon Valley, RARE, North Richmond, San Leandro, fill stations - New projects (Phillips66, satellites/decentralized, etc.) - Other potential projects (partnership with CCWD, etc.) - Customer base: demands, water quality needs - Hydraulic modeling - Project layouts (treatment, conveyance) - Project operations - Project costs and implementation timeline - Reduce nutrients to Bay - Comparison to potable reuse options - Recommendations 12

13 Master Plan Update Outline Recommendations - Alternatives and screening - Preferred alternative and new goal that includes non-potable and potable reuse - Implementation schedule - Cost for recommended program (CIP) - Funding options - Implementation factors and roadmap for outreach - Environmental documentation requirements 20 MGD? 14 MGD ? 13

14 Master Plan Update Schedule Proposed Schedule: - Scope of work: Sept - Oct Request for proposals: Nov Consultant selection/contract negotiation: Dec Jan Contract award: Feb Notice to proceed: Mar Master plan update completion: End of 2017/FY18 14

15 Questions & Comments 15

16 North Richmond Water Recycling Update Planning Committee September 13, 2016

17 Agenda West County Wastewater District (WCWD) Plant Construction Update Recycled Water Facility Status Chevron North Richmond Agreement Negotiations West County Agreement Negotiations 2

18 WCWD Plant Construction Update Improvement schedule: May June 2017 Recycled water optimization, future nutrient removal - Nitrification and denitrification - Adding 3rd aeration basin Operating only one aeration basin May-October Sedimentation basins Activated sludge aeration basins 3

19 WCWD Construction Water Quality Impacts Operating one aeration basin - Elevated ammonia in WCWD effluent (~20 mg/l) North Richmond not designed to remove ammonia - Breakpoint chlorination removes some ammonia (~5 mg/l) Chevron cooling tower specification for ammonia - < 1 mg/l as N (control biological growth) Second aeration basin in service November

20 Recycled Water Facility Status North Richmond Recycled Water Plant - Stopped producing recycled water May Restart North Richmond when influent ammonia drops (by June 2017) - Critical maintenance projects underway 5

21 Recycled Water Facility Status Potable Water being supplied to Chevron Cooling Towers - Issues with feeding adequate water from Castro St. potable meters, still under investigation by refinery - Pumping potable water from North Richmond to Chevron, charging potable water rates Richmond Advanced Recycled Expansion (RARE) Project - Not impacted by WCWD construction water quality changes - Full delivery of recycled water to Chevron 6

22 Chevron North Richmond Agreement Negotiations First major recycled water customer Original 1990 agreement - Expires January Recycled water rates 1995: potable minus extra Chevron costs 2005: about 50% of potable EBMUD s current recycled water rate about 80% of potable 7

23 Chevron North Richmond Agreement Negotiations EBMUD/Chevron Agreement 2016 negotiations - Met five times since March, more meetings scheduled - EBMUD intends standard recycled water rate, 80% of potable - Finalize new agreement before January 2017 New EBMUD/Chevron Agreement goals - Update recycled water price and terms - Review and update water quality specification for cooling towers 8

24 WCWD Supply Agreement Negotiations Current Supply Agreement amended in Effluent quality more stringent than required by discharge permit - WCWD effluent has not consistently met specifications New Supply Agreement - Specify water quality needed for North Richmond - EBMUD pay WCWD s differential costs - Off-Spec water? EBMUD would not pay 9

25 Equitable Cost Allocations Computer model for WCWD treatment plant Model allocates initial differential costs Calibrate model using actual data and costs WCWD s permit requirements change in future Revise cost allocations 10

26 WCWD Agreement Negotiations Supply Agreement Schedule September 19 Initial staff level meeting - November 8 EBMUD Board briefing - TBD EBMUD/WCWD Board-to-Board Meeting Final EBMUD & WCWD Board approvals by spring

27 Questions & Comments 12

28 Semi Annual Water Quality Report Planning Committee September 13, 2016

29 Drinking Water Standards The District met all Federal and State drinking water standards

30 Water Quality Goals The District strives to meet all water quality goals Jan Jun 2016 exceeded the water quality goals for TTHMs HAA5 NDMA NDEA Disinfection byproducts Filter Backwash recovery time

31 Disinfection Byproducts Recent increase in raw water precursors Warmer temperatures Need higher chlorine dose at treatment plants to maintain residuals in distribution system

32 Source Water Precursors 3.5 TOC, Pardee Tower, Dec-97 Dec-99 Dec-01 Dec-03 Dec-05 Dec-07 Dec-09 Dec-11 Dec-13 Dec-15 Dec-17 Total Organic Carbon, mg/l

33 THMs from Inline Plants 80 THMs in Effluent of Inline Plants, Jun July THM (ug/l) water temperature, C Or Eff WC Eff Laf Eff water temp, C 0-5

34 Chlorine in Plant Effluents 3.5 Plant Effluent Chlorine Residual (Entry Point to Distribution System) total chlorine, mg/l Orinda 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 Walnut Creek Lafayette Sobrante USL Data from WTRM, operator grab samples analyzed every four hours, graphed as monthly averages.

35 Filter Backwash Recovery Sobrante Water Treatment Plant Manganese Orinda Briones draft

36 Butte Fire Water Quality Impacts September 2015 Lower part of the Mokelumne River watershed Small part of watershed (approx. 4%) Followed by a normal rainfall year

37 Butte Fire Sept 2015 Sample sites Approximate burn area

38 Butte Fire Water Quality Impacts More than 60 parameters measured (metals, nutrients, carbon, physical parameters) Sample collection timed to capture impact of rainfall events Impact of burn area affected by Middle and South forks and PG&E operation

39 Butte Fire Water Quality Impacts Increased Concentrations aluminum, iron, calcium, sodium, total dissolved solids, turbidity, silicon, specific conductivity, and total suspended solids Consistent with Power Fire impacts to water quality

40 Butte Fire example data HWY 49 GRAB vs NORTH FORK GRAB FOR IRON NOV 2015 THRU MAR 2016 HWY 49 GRAB IRON NORTH FORK GRAB IRON 8000 IRON, ug/l DATE/TIME

41 Butte fire example data HWY 49 GRAB vs NORTH FORK GRAB FOR TOC NOV 2015 THRU MAR 2016 HWY 49 GRAB TOC NORTH FORK GRAB TOC 6 5 TOC, mg/l DATE/TIME

42 Other WQ Topics Lower PHG for antimony 20 µg/l to 1 µg/l MCL = 6 µg/l New MCL for 1,2,3-TCP 5 ng/l Not detected in UCMR3 sampling (DLR = 30 ng/l)

43 Questions?

44 Semi-Annual Regulatory Compliance Update Planning Committee September 13, 2016

45 Agenda Reporting Period: March 1, 2016 through August 31, 2016 Enforcement actions Workplace Health and Safety Upcoming activities 2

46 Enforcement Review Strategic Plan KPI = Zero NPDES and Waste Discharge Requirement (WDR) permit Notices of Violation (NOVs) received This reporting period 4 NOVs for NPDES or WDRs 1 NOV for air permit 3

47 Notices of Violation San Pablo WTP Originally 9 violations Reduced to 3 violations for chlorine residual limit exceedances Paid $9,000 mandatory minimum penalties 4

48 Notices of Violation (continued) Camanche North Shore WWTP Insufficient reporting Exceeded coliform and ph effluent limits Assess groundwater impacts District response: Refute NOVs for coliform and ph as no limits exist in the permit Plan to modify data format to address reporting deficiencies Plan to conduct a technical review to evaluate any groundwater impacts from the WWTP ponds 5

49 Notices of Violation (continued) Orinda WTP Exceeded DCBM limits on 4 occasions DCBM is a disinfection byproduct DCBM increase was related to drought operations and the need to chlorinate upcountry to protect threatened fish species in East Bay reservoirs Permit no longer in place $6,000 mandatory minimum penalty is anticipated 6

50 Notices of Violation (continued) Summit Reservoir Replacement Contractor demolition Discharged stormwater containing pentachlorophenol (PCP) Alameda County DA investigation continues 7

51 Notices of Violation (continued) Main WWTP Vented digester gas through relief valve Failed to assemble the valve properly following the outage Prepare better checklists to verify system configuration 8

52 Lost Time Injury Rate 9

53 Upcoming Activities Close out wells at Bixler US Army Corps investigating San Pablo Ridge site for historic underground tanks/piping associated with military operations Complete restoration at Glen Echo Creek Procure replacement diesel engine generators Complete safety perception survey