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Home My WebLink About04.a. Receive WateReuse California 2019 Conference presentation by Woodard & Curran on urban stormwater runoff Page 1 of 14 Item 4.a. ,orVIOIN SAN June 10, 2019 TO: REAL ESTATE, ENVIRONMENTAL AND PLANNING COMMITTEE FROM: MELODY LABELLA, RESOURCE RECOVERY PROGRAM MANAGER REVIEWED BY: JEAN-MARC PETIT, DIRECTOR OF ENGINEERING AND TECHNICAL SERVICES ROGER S. BAILEY, GENERAL MANAGER SUBJECT: RECEIVE WATEREUSE CALIFORNIA 2019 CONFERENCE PRESENTATION BY WOODARD & CURRAN ON URBAN STORMWATER RUNOFF At the March 2019 WateReuse California Conference, a presentation was given by Woodard & Curran on the wastewater acceptance of urban stormwater runoff in Southern California. At the April 15, 2019 Real Estate, Environmental & Planning (REEP) Committee meeting, Member McGill requested that staff review this presentation. Subsequent to that meeting, staff reached out to Woodard & Curran to request that they attend a future REEP Committee meeting to recap the presentation. As the original presenter Rob Morrow is no longer with Woodard & Curran, Senior Client Manager Kathleen Higgins will be attending the Committee meeting to review the attached presentation. ATTACHMENTS: 1. Presentation June 10, 2019 REEP Committee Meeting Agenda Packet- Page 9 of 30 Page 2 of 14 Central Contra Costa Sanitary District REEP Committee Meeting June 10, 2019 How Urban Runoff Can Mitigate Conservation Impacts to your Wastewater/Reuse Systems Kathleen Higgins,P.E. Senior Client Manager khiggins@woodardcurran.com _. 949.420.5313 W00 DA R D &CURRAN Presentation Outline ■ Background 5O 20W IRP Projettl4ns ■ Examples �`�° ,� 1=4r O 131 m•d ■ Drivers & Benefits `=°'S' 12020' 350 ■ Impacts & Considerations , ApwlMurlAvnge ouwmoru=� ^t Wistewasta Flow Prokctfo�t ■ Questions/Discussion 3 250 200 2000 2005 2010 2015 2020 2025 2030 2035 2070 2045 —Actual Annual Wastewater Flow - 2006 IRP Projections OneWater LA 2040 Projections 1 June 10, 2019 REEP Committee Meeting Agenda Packet- Page 10 of 30 WOODRRD &CURRAEJ Urban • Runoff ' ry • I i i Los Angeles River Source:Wikimedia Commons WOODARD &CURRAN , • , ry weather flows to the sewer system household�•wa;• t reatrrTREATS drains into iaaa•aa storm 4raln storm dnln channel UNTREATED Source:h2oc.org A Low Flow Diversion Systems &CURRCURRANEJ Pumpstation in stormwater well I IM OCSD wastewater * treatment plant ,t Berms in stormwater channels Credit:Tom Meregillano,OCSDI poh a,Ak WOODARD &CURRAN O 5-0k r S— DIVERSION VALVE PLAN VIEW i _ Source:SOCWA MA FARMMM'FRI 4 1 • - • �•- •. ' '.•- • 1 Page 5 of 14 Presentation Outline ■ Background ■ Examples ■ Drivers & Benefits Thank youto: ■ Impacts & Considerations Amber • CWAMerrill Seiler, OCSD • Questions/Discussion OCSD and Partners urban runoff program w.TE.�,Eo � � wa.ERS�Eo ur* RVIIDII�IY[�SIOIIS g8T0.L —. Psu vcU Vne� me .. wnTSAsuso 7 IVIe COPeT0.L w0.TEuae+Eo 4 June 10, 2019 REEP Committee Meeting Agenda Packet- Page 13 of 30 Page 6 of 14 South O.C. Wastewater Authority (SOCWA) 1 South O.C. Watershed Management Area Orange County r� ti e 1. r { AM Cn•k I p \ EjDuw AanlCanlid Slrcw•u i ' ... 1 LdyVd Ca�ld slre� ,.+��.. I I I ©Sm CNmenl�Cvwld Shwml _ � �'•^'�`^ • r I Srn luR•Creak �� `-�` 1 _ _ 1 V L Sdd Qmge Cmeft Wal—hedlA—Q—t Men A P SOCWA Diversions SPEP Y\ O � o�G�e ` i rte•._ • ��_ �—�.��`� •t�•l�Q-G� � •- I��sai�t..`'��'".. . • `. • \ a 5� 10 S June 10, 2019 REEP Committee Meeting Agenda Packet- Page 14 of 30 Page 7 of 14 Example OCSD Projects Santa Ana River Channel a= oil 1 Presentation Outline ■ Background ■ Examples ■ Drivers & Benefits ■ Impacts & Considerations ■ Questions/Discussion 6 June 10, 2019 REEP Committee Meeting Agenda Packet- Page 15 of 30 Page 8 of 14 Drivers - Water Quality ■ Beach Closures - bacteria • Surface water quality—TMDLs ❑Cs� 7 3 Diversions have lead to improved beaches 140 300 273 3 0 Vera 20 ■ ntuCounty 250 C ■Los Angeles County G 00 0 Orange County 200 r0 80 ❑San Oiego C—ty E � •o1BMD 150 Z Q 60 b� 40 100 20 5 LJ 13.1 0 0 yam~ip y�ryC�y 1��ryC�� y� ��rya�� 2000 20012002 2048 2004 2005 2006 2007 2006 2009 2010 20112012 2013 Year Completed Year Source: • Retrospective • 1 • • ' 0. • • • •• • • ••k at the Southern California •. Ocean 7 June 10, 2019 REEP Committee Meeting Agenda Packet- Page 16 of 30 Page 9 of 14 Drivers - Reduced WW Flows + Collection System ■ Conservation Impacts Odor—public complaints Corrosion— reduced infrastructure life ■ Diversion Benefits Diluting high strength sewage Reducing detention time s Drivers - Reduced WW Flows + WWTP ■ Conservation Impacts Upsets from sulfite toxicity Reduced organic treatment capacity Higher energy and chemical needs Lower energy production ■ Diversion Benefits Dilution 8 June 10, 2019 REEP Committee Meeting Agenda Packet- Page 17 of 30 Page 10 of 14 Drivers - Reduced WW Flows + Reuse ■ Conservation Impacts Reduced supply Higher TDS ■ Diversion Benefits Increased supply during the peak irrigation season Reducing TDS Presentation Outline ■ Background ■ Examples ■ Drivers & Benefits ■ Impacts & Considerations ■ Questions/Discussion 9 June 10, 2019 REEP Committee Meeting Agenda Packet- Page 18 of 30 Page 11 of 14 Considerations - Sewers stem capacity ■ System: Hydraulic constraints Flow monitoring ■ Daily: Diversion timing ■ Seasonal: Wet weather shutoff Considerations - WWTP ■ Operations: Changes to WW quality Quality within local limits Improved organic capacity - r SW quality monitoring ■ WWTP Components Hydraulic constraints • Discharge Permit ' NPDES local limits NPDES Effluent limit compliance - •-•• • • ••• Potable reuse source control 10 June 10, 2019 REEP Committee Meeting Agenda Packet- Page 19 of 30 Page 12 of 14 Considerations - Decreasing Runoff Flows AV REPORT WATER POLLUTION I FAQ I ABOUT US I BLOG I CL G SeIWL.mun. HpOC CITIES i EVENTS SHOW ME MY WATERSHED STORMWATER PROGRAM Home ,Resources : feke Action :011:1—e;1:.F,uuL JOIN THE OVERWATERING IS OUT CHALLENGE TO REDUCE YOUR IMPACT,SAVE MONEY, AND HELP CREATE A CLEANER, HEALTHIER FUTURE! 1 FEConsiderations - Funding sources & Environmental Concerns In addition common recycled water funding sources... ■ Stormwater benefits (e.g., TMDQ ■ Avoided beach closures ■ Increased reuse (sales) Environmental Issues ■ CEQA ■ Downstream flows for habitat 11 June 10, 2019 REEP Committee Meeting Agenda Packet- Page 20 of 30 Page 13 of 14 Presentation Outline ■ Background ■ Examples ■ Drivers ■ Considerations ■ Questions/Discussion 3 Nar°nY -. v Nap vxa.rtla� r:•" Stormwater Projects F"'tela° both urban and _ a,uoen r r r..r concw a° ° °Stockton �� w� nonurban stormwater �� eplvarmora �lodeslo Ear Franl♦t° °Prem art solJfCE' Table ES1 Annual Stormwater Targets for Groundwater Recharge and Direct Use In Urban r"° non-urban California(taf'lyear) stormwater source Urban Sources Non-Urban Sources— urban stormwater source Targetyear Groundwater Direct Groundwater Recharge Use Recharge Grouped S[ormwater 2020 Target 100 5 100 P 2055 Target 200 50 200 N°tes: 'Thousand acre-leet. E 6 E "St°mtwalerfrom non-urban sources NaE henefd uNan rater suppy Nmugh groundwater recharge. r°n�,�, .rni.r I:tma Lompoc lesp4,,, °Lancaster LaFu " Fad 5°nla ePalm dale °vitt—n. Giy3. . ary ° lFs sera •• a <I�rV�e�C''AY Fvk Los � C°IhedrY ""'T�•' 5°nt�411a Mvr11.r I �, 1urce:Stormwater Targets / ° a— Groundwater Recharge and Direct -Sea WW. Yum.Ramp san o GaM 1 1 __ J°Y Esrl,HERE.Garmin,FAO NOAA.USGS,EPA.NPS 24 12 June 10, 2019 REEP Committee Meeting Agenda Packet- Page 21 of 30 Page 14 of 14 Central Contra Costa Sanitary District REEP Committee Meeting June 10, 2019 How Urban Runoff Can Mitigate Conservation Impacts to your Wastewater/Reuse Systems Kathleen Higgins,P.E. Senior Client Manager khiggins@woodardcurran.com _. 949.420.5313 W00 DA R D &CURRAN 13 June 10, 2019 REEP Committee Meeting Agenda Packet- Page 22 of 30