Lake County Clean Water Program Water Quality Activities TMDL L AKE C OUNTY W ATER R ESOURCES D EPARTMENT L AKE C OUNTY W ATERSHED P ROTECTION DISTRICT B LUE R IBBON T ECHNICAL S UBCOMMITTEE A PRIL 19, 2019 R UNNING C REEK C ASINO , U PPER L AKE , CA
Acknowledgments and Thanks
Outline • Introduction to Clean Water Program • Water Quality Activities in Lake County • Current & Future • Data • TMDL Activities– Lake County Perspective • Data • Current & Future
Clean Water Program Storm Water Management April 2019
Clean Water Program
Clean Water Program
Clean Water Program – Agreement & Map
CWP - Next Steps • Agreement Approved & Sent to State – County, Lakeport, Clearlake • Introduce and establish Official Management Council - April 25th • Members, By-Laws, Work Groups, & Schedule • Legally move forward to complete storm water tasks • Coordinate with other departments and agencies • CDD • Environmental Health • Public Works • CASQA • Water Boards • Tribes • Farm Bureau
Table #: Clean Water Program Proposed Time Schedule with special consideration for TMDL-Related Activities PROPOSED CHANGES IN RED 2019 2020 2021 2022 2023 2024 2025 TASK # & DESCRIPTION J-F-M A-M-J J-A-S O-N-D J-F-M A-M-J J-A-S O-N-D J-F-M A-M-J J-A-S O-N-D J-F-M A-M-J J-A-S O-N-D CWP Joint Power Submission x Request Letter CWP Joint Power Agreement x Approval CWP JPA Agreement Submission x RWQCB CWP Bylaws Finalized x Design and Form Workgroups x Meeting Schedule for Workgroups PEOP & PP x IDDE & Trash Provision x Con /Pcon/LID MUNI TMDL & EAIP x Fundraising / Financial x Reporting SMARTS x x x x Update Website - LC x x x x Update Website – Lakeport x Update Website – Clearlake BOS / City / Public Presentations x x x x x Update Website x x x x x x x x x x x x x x x x Update Storm Water Man. Plan (LC- x x x x SWMP) TMDL Tasks (This section needs to be updated based on feedback from TSO and July 1 st due date for Monitoring plan and associated QAPPs) Submit Time Schedule Order x Develop BMP Monitoring Plan x Conduct Storm WQ Monitoring x x x x x x x Analyze Storm WQ Results x x x x x Identify priority locations for BMP x x x x Develop plan for BMP placement x x x Coordinate w/ Dept. for BMPs Develop TMDL section for LCSWMP x x x x
Water Quality Activities April 2019
Water Quality Activities – Current • Post-Fire Stream Storm Monitoring • Post-Fire Factsheet (hard copies) • QAPP / CEDEN in progress… • Lake Monitoring w/ DWR • Chl A – TMDL target • Sediment Cores from top 10cm • N & P, Al-P, Fe-P • Currently being analyzed by UC Davis – Dr. Steve Sadro’s Lab • Aquatic Plant Treatments & Data • Shoreline development & construction activity • Q/Z Mussel Monitoring – some WQ CDFW
1000.00 Reference - Kelsey Creek TSS (Lake County WRD 2014-2019) 900.00 800.00 700.00 TSS (mg/L) 600.00 500.00 y = -0.0087x + 650.58 R² = 0.0002 400.00 300.00 Pre/ Post-Fire 200.00 100.00 0.00 – Stream TSS Jun-14 Dec-14 Jul-15 Jan-16 Aug-16 Mar-17 Sep-17 Apr-18 Oct-18 May-19 2500.00 Middle Creek TSS (Lake County WRD 2014-2019) 2000.00 Trends TSS (mg/L) 1500.00 y = 0.1397x - 5441.4 1000.00 R² = 0.0135 500.00 0.00 Jun-14 Dec-14 Jul-15 Jan-16 Aug-16 Mar-17 Sep-17 Apr-18 Oct-18 May-19 Scotts Creek TSS (Lake County WRD 2014-2019) 1400.00 1200.00 1000.00 TSS (mg/L) 800.00 y = 0.028x - 785.11 R² = 0.0011 600.00 400.00 200.00 0.00 Jun-14 Dec-14 Jul-15 Jan-16 Aug-16 Mar-17 Sep-17 Apr-18 Oct-18 May-19 Sample Date
30 Lake- Upper Arm Total Suspended Solids (CDWR 2005 - 2018) y = 0.0013x - 48.317 25 R² = 0.1647 20 TSS (mg/L) 15 10 Pre-Fire Lake 5 0 260 TSS Trends Lake- Oaks Arm TSS (CDWR 2000-2018) 240 y = 0.0118x - 299.79 R² = 0.4253 220 200 TSS (mg/L) 180 160 140 120 100 260 Lake- Lower Arm TSS (CDWR 2000-2018) 240 y = 0.0109x - 259.68 220 R² = 0.4113 TSS (mg/L) 200 180 160 140 120 100 Jan-04 Oct-06 Jul-09 Apr-12 Dec-14 Sep-17 Jun-20 Sample Date
Sediment Cores – Total P (DWR & UCD) Total P (ug/g dry wt.) Average top 10 cm Upper Arm 2008-2016 2000 1800 AVERAGE y = -0.0531x + 3385 1600 Total P ug/g, dry wt. 1400 1200 1000 800 600 400 200 0 12/10/2008 12/10/2009 12/10/2010 12/10/2011 12/10/2012 12/10/2013 12/10/2014 12/10/2015 12/10/2016 July 2018
Water Quality Activities – Planned • MS4 Storm Water Monitoring • Lake County, Lakeport, Clearlake – Plan before 2020 Storm Season • Urban inputs – sediments, nutrients • Trash impacts – plan done in July • TMDL Monitoring • Part of MS4 Monitoring above • Expand surface stream monitoring – Quality & Quantity • Adobe Creek / Highland Springs • Upper Watershed – Alley, Clover, Tule Lake, Scotts Creek • Middle Creek Wetland Restoration Area Pre / Post • Data Management • Get all new & old data into CEDEN • Portal / Access from WRD webpage
TMDL!
TMDL – What & How? • Total Maximum Daily Load • Impaired waterbody 303d list by USEPA – bill of health • Allowable amount or “load” - health target • Way to gauge lake health – is what you are doing working? • Clear Lake Nutrient TMDL Chl A – 73ug/l
Surface Chl A (ug/L) for Clear Lake (2005 - 2019) ug/L 0.5 m & 3 m 400.0 Upper Arm Lower Arm Oaks Arm TMDL Target (73 ug/L) 350.0 300.0 Chl A Concentration (ug/L or ppb) 250.0 200.0 150.0 100.0 50.0 0.0
Lake County’s Role in TMDL • Reduce P / sediments inputs in from • County MS4 areas • Yellow (not tan) • Non-MS4 areas • Highland Springs • Middle Creek • Scott’s Valley • County Park area
Clearlake TMDL • Reduce P / sediments inputs in from • Purple Shaded areas – for TMDL • Urban areas • New Construction • Roads • Direct Lake input, outflows • Street sweeping / cleaning • Any other storm water infrastructure
Lakeport TMDL • Reduce P / sediments inputs from • Urban areas • New Construction • Roads • Direct Lake input, outflows • Street sweeping / cleaning • Impervious surface $$
CWP TMDL - Steps Forward • Quantify Structural Control Develop method to track bmps • Find them • Identify effectiveness Expand monitoring & Find literature • Quantifying source control Outreach effectiveness • Blue Ribbon Outreach Special Project Proposal • Program Expansion • Create a TMDL Monitoring Plan & QAPP (before 2020) • Budget for monitoring plan • Grants for planning projects are limited or absent • Increase Storm Water Outreach • Think about contribution of internal lake processes • Boating activity • Shoreline activities
Example: July 2018
Example: July 2018
Example: July 2018
See, Learn, Like April 2019
Questions? Angela.Depalma-Dow@lakecountyca.gov July 2018
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