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Lake County Clean Water Program

Water Quality Activities TMDL

LAKE COUNTY WATER RESOURCES DEPARTMENTLAKE COUNTY WATERSHED PROTECTION DISTRICT

BLUE RIBBON TECHNICAL SUBCOMMITTEEAPRIL 19, 2019

RUNNING CREEK CASINO, UPPER LAKE, 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 ProgramStorm 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

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 xDesign and Form Workgroups x

Meeting Schedule for Workgroups PEOP & PP x

IDDE & Trash Provision xCon /Pcon/LID

MUNITMDL & EAIP x

Fundraising / Financial xReporting SMARTS x x x x

Update Website - LC x x x xUpdate Website – Lakeport xUpdate Website – Clearlake

BOS / City / Public Presentations x x x x xUpdate 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 xConduct Storm WQ Monitoring x x x x x x x

Analyze Storm WQ Results x x x x xIdentify priority locations for BMP x x x xDevelop plan for BMP placement x x x

Coordinate w/ Dept. for BMPsDevelop 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

y = -0.0087x + 650.58R² = 0.0002

0.00

100.00

200.00300.00

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 - 5441.4R² = 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 - 785.11R² = 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

Pre-Fire Lake TSS Trends

y = 0.0013x - 48.317R² = 0.1647

0

5

10

15

20

25

30

TSS

(mg/

L)

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

y = 0.0118x - 299.79R² = 0.4253

100

120

140

160

180

200

220

240

260

TSS

(mg/

L)

Lake- Oaks Arm TSS (CDWR 2000-2018)

y = 0.0109x - 259.68R² = 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)

Sediment Cores – Total P (DWR & UCD)

July 2018

AVERAGE y = -0.0531x + 3385

0

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

Tota

l P

ug/g

, dry

wt.

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

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!

• 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?

0.0

50.0

100.0

150.0

200.0

250.0

300.0

350.0

400.0

Chl A

Con

cent

ratio

n (u

g/L

or p

pb)

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)

• 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

• 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

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

Lakeport TMDL

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

July 2018

Example:

July 2018

Example:

July 2018

Example:

See, Learn, Like

April 2019

Questions? Angela.Depalma-Dow@lakecountyca.gov

July 2018