Lake County Clean Water Program Water Quality Activities TMDL L - - PowerPoint PPT Presentation

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Lake County Clean Water Program Water Quality Activities TMDL L - - PowerPoint PPT Presentation

Jun 03, 2023 393 likes •705 views

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

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SLIDE 1

Lake County Clean Water Program Water Quality Activities TMDL

LAKE COUNTY WATER RESOURCES DEPARTMENT LAKE COUNTY WATERSHED PROTECTION DISTRICT

BLUE RIBBON TECHNICAL SUBCOMMITTEE APRIL 19, 2019 RUNNING CREEK CASINO, UPPER LAKE, CA

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SLIDE 2

Acknowledgments and Thanks

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SLIDE 3

Outline

  • Introduction to Clean Water Program
  • Water Quality Activities in Lake County
  • Current & Future
  • Data
  • TMDL Activities– Lake County Perspective
  • Data
  • Current & Future
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SLIDE 4

Clean Water Program Storm Water Management

April 2019

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SLIDE 5

Clean Water Program

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SLIDE 6

Clean Water Program

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SLIDE 7

Clean Water Program – Agreement & Map

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SLIDE 8

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
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SLIDE 9

Table #: Clean Water Program Proposed Time Schedule with special consideration for TMDL-Related Activities PROPOSED CHANGES IN RED TASK # & DESCRIPTION

2019 2020 2021 2022 2023 2024 2025

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 Request Letter x CWP Joint Power Agreement Approval x CWP JPA Agreement Submission RWQCB x 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- SWMP) x x x x TMDL Tasks (This section needs to be updated based on feedback from TSO and July 1st 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

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SLIDE 10
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SLIDE 11

Water Quality Activities

April 2019

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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
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y = -0.0087x + 650.58 R² = 0.0002 0.00 100.00 200.00 300.00 400.00 500.00 600.00 700.00 800.00 900.00 1000.00 Jun-14 Dec-14 Jul-15 Jan-16 Aug-16 Mar-17 Sep-17 Apr-18 Oct-18 May-19

TSS (mg/L)

Reference - Kelsey Creek TSS (Lake County WRD 2014-2019)

y = 0.1397x - 5441.4 R² = 0.0135 0.00 500.00 1000.00 1500.00 2000.00 2500.00 Jun-14 Dec-14 Jul-15 Jan-16 Aug-16 Mar-17 Sep-17 Apr-18 Oct-18 May-19

TSS (mg/L)

Middle Creek TSS (Lake County WRD 2014-2019)

y = 0.028x - 785.11 R² = 0.0011 0.00 200.00 400.00 600.00 800.00 1000.00 1200.00 1400.00 Jun-14 Dec-14 Jul-15 Jan-16 Aug-16 Mar-17 Sep-17 Apr-18 Oct-18 May-19

TSS (mg/L) Sample Date

Scotts Creek TSS (Lake County WRD 2014-2019)

Pre/ Post-Fire – Stream TSS Trends

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SLIDE 14

Pre-Fire Lake TSS Trends

y = 0.0013x - 48.317 R² = 0.1647 5 10 15 20 25 30

TSS (mg/L)

Lake- Upper Arm Total Suspended Solids (CDWR 2005 - 2018)

y = 0.0118x - 299.79 R² = 0.4253 100 120 140 160 180 200 220 240 260

TSS (mg/L)

Lake- Oaks Arm TSS (CDWR 2000-2018)

y = 0.0109x - 259.68 R² = 0.4113 100 120 140 160 180 200 220 240 260 Jan-04 Oct-06 Jul-09 Apr-12 Dec-14 Sep-17 Jun-20

TSS (mg/L) Sample Date

Lake- Lower Arm TSS (CDWR 2000-2018)

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Sediment Cores – Total P (DWR & UCD)

July 2018

AVERAGE y = -0.0531x + 3385

200 400 600 800 1000 1200 1400 1600 1800 2000 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

Total P ug/g, dry wt.

Total P (ug/g dry wt.) Average top 10 cm Upper Arm 2008-2016

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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
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TMDL!

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  • 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

TMDL – What & How?

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0.0 50.0 100.0 150.0 200.0 250.0 300.0 350.0 400.0

Chl A Concentration (ug/L or ppb)

Surface Chl A (ug/L) for Clear Lake (2005 - 2019) ug/L 0.5 m & 3 m

Upper Arm Lower Arm Oaks Arm TMDL Target (73 ug/L)

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  • 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

Lake County’s Role in TMDL

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SLIDE 23
  • 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

Clearlake TMDL

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SLIDE 24
  • Reduce P / sediments inputs from
  • Urban areas
  • New Construction
  • Roads
  • Direct Lake input, outflows
  • Street sweeping / cleaning
  • Impervious surface $$

Lakeport TMDL

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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
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SLIDE 26

July 2018

Example:

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SLIDE 27

July 2018

Example:

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SLIDE 28

July 2018

Example:

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See, Learn, Like

April 2019

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Questions? Angela.Depalma-Dow@lakecountyca.gov

July 2018