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S anta Cruz M id- Count y Groundwater Bas in G R O U N D WAT E R S U S TA I N A B I L I T Y P L A N
Novemb er 2019
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Santa Cruz Mid-County Groundwater BasinSanta Cruz Mid-County Groundwater Basin·|}þ9 ·|}þ17
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Santa CruzSanta CruzCapitolaCapitola
SoquelSoquel
AptosAptos
La SelvaLa SelvaBeachBeach
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Santa Cruz Mid-County Groundwater Sustainability Plan
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Santa Cruz Mid-County Groundwater Sustainability Plan
ACKNOWLEDGEMENTS
SANTA CRUZ MID-COUNTY GROUNDWATER AGENCY BOARD MEMBERS
Curt Abramson, Private Well Owner Rep. Dr. Tom LaHue, SqCWD Director David G. Baskin, Water Commissioner
City of Santa Cruz John Leopold, Supervisor
County of Santa Cruz Dr. Bruce Daniels, SqCWD Board President Robert Marani, CWD Director
Zach Friend, Supervisor County of Santa Cruz
Cynthia Mathews, Council Member City of Santa Cruz
Jon Kennedy, Private Well Owner Rep. Marco Romanini, CWD Director James Kerr, Private Well Owner Rep.
GROUNDWATER SUSTAINABILITY PLAN ADVISORY COMMITTEE MEMBERS
Kate Anderton, Environmental Jon Kennedy, Private Well John Bargetto, Agriculture Jonathan Lear, At Large
David Baskin, City of Santa Cruz Marco Romanini, CWD Director Rich Casale, Small Water System Management Allyson Violante, County of Santa Cruz
Keith Gudger, At Large Thomas Wyner for Cabrillo College, Dr. Bruce Jaffe, SqCWD Director Institutional
Dana Katofsky McCarthy, Rate Payer
MEMBER AGENCY STAFF
Soquel Creek Water District General Manager Ron Duncan and staff City of Santa Cruz Water Department Director Rosemary Menard and staff County of Santa Cruz Water Resources Director John Ricker, Sierra Ryan and staff Central Water District District Manager Ralph Bracamonte
PLANNING, TECHNICAL, & FACILITATION SUPPORT
Regional Water Management Foundation: Tim Carson, Laura Partch, Darcelle Pruitt Montgomery & Associates: Georgina King, Cameron Tana, Derrik Williams Kearns & West: Eric Poncelet, Cici Vu
The Santa Cruz Mid-County Groundwater Agency gratefully
acknowledges the funding contribution from the California
Department of Water Resources. Funding for this project
has been provided in part from the Water Quality, Supply,
and Infrastructure Improvement Act of 2014 and through an
agreement with the Department of Water Resources.
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Santa Cruz Mid-County Groundwater Sustainability Plan
ACKNOWLEDGEMENTS
TECHNICAL ADVISORY COMMITTEE (TAC) MEMBERS AND OTHER PARTICIPANTS
TAC MEMBERSHIP
Bruce Daniels, Ph.D. President, Soquel Creek Water District Board - Hydroclimatology, Climate
Change
Andrew Fisher, Ph.D. University of California, Santa Cruz - Professor, Hydrogeology. UC Water
Security and Sustainability Research Initiative (UC Water)
Barry Hecht Balance Hydrologics – Principal Geomorphologist, Hydrogeologist, Surface Water-
Groundwater Interactions
Brian Lockwood, PV Water – General Manager, Hydrologist Robert Marks, Pueblo Water Resources, Inc. - Principal Hydrogeologist, Consultant to City of Santa Cruz
MODELING TEAM
Pascual Benito, Montgomery and Associates - Senior Hydrogeologist
Sean Culkin, formerly Montgomery and Associates - Senior Hydrogeologist
Hanieh Haeri, Montgomery & Associates - Engineering Hydrologist
Justin Huntington, Huntington Hydrologic, Desert Research Institute - PRMS and GSFLOW
setup
John Mejia, Montgomery & Associates – Hydrologist, Desert Research Institute, climate
downscaling
Georgina King, Montgomery and Associates - Senior Hydrogeologist Cameron Tana ,Montgomery and Associates - Principal Hydrologist Linda Woolfenden, US Geological Survey - GSFLOW experience
TAC MEETING PARTICIPANTS:
Shawn Chartrand, Balance Hydrologics - Principal Geomorphologist, Hydrologist, consultant to
City of Santa Cruz
Nick de Sieyes, private well owner at invitation of Central Water District
Jon Kennedy, MGA Board member, private well representative Eric Poncelet, MGA GSP facilitation team
Joel Smith, subconsultant to City of Santa Cruz on climate futures
MGA PARTICIPANTS:
Ralph Bracamonte, Central Water District – General Manager
Tim Carson, Regional Water Management Foundation, Program Director
Brice Dahlmeier, Soquel Creek Water District – Associate Engineer
Taj Dufour, Soquel Creek Water District - Engineering Manager
Ron Duncan, Soquel Creek Water District - General Manager
Heidi Luckenbach, City of Santa Cruz Water Department - Deputy Water Director/Engineering
Manager
Rosemary Menard, City of Santa Cruz Water Department - Water Director
mailto:bhecht@balancehydro.commailto:lockwood@pvwater.orgmailto:rmarks@pueblo-water.com
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Santa Cruz Mid-County Groundwater Sustainability Plan
Melanie Mow Schumacher, Soquel Creek Water District - Special Projects, Communication
Manager
Darcelle Pruitt, Regional Water Management Foundation - Senior Planner
John Ricker, Santa Cruz County Health Services Agency, Environmental Health – Water
Resources Division Director
Sierra Ryan, Santa Cruz County Health Services Agency, Environmental Health – Water
Resources Planner
Isidro Rivera, City of Santa Cruz Water Department - Associate Civil Engineer
SURFACE WATER WORKING GROUP PARTICIPATING ORGANIZATIONS
California Department of Fish and Wildlife – Randi Adair, Stephanie Holstege, John Jankowitz,
Michelle Leicester, and Monica Oey
California Department of Water Resources (DWR) – Amanda Peisch Derby
City of Santa Cruz – Ezekiel Bean, Chris Berry, and Chris Coburn
Environmental Defense Fund (EDF) – Christina Babbitt, Sarah Fakhreddine, Maurice Hall, and
Anthony Saracino.
Friends of Soquel Creek – Carla Christensen
GSP Advisory Committee – Kate Anderton, Keith Gudger, Dr. Bruce Jaffe, Jon Lear, Marco
Romanini, and Allyson Violante
Montgomery & Assoc. (MGA Technical Consultants) – Georgina King and Cameron Tana
The Nature Conservancy (TNC) – Melissa Rohde
National Marine Fisheries Service (NMFS, formerly NOAA Fisheries) – Darren Howe, Rick
Rogers, William Stevens, and Andres Ticlavilca
Pajaro Valley Water Management Agency (PV Water) – Brian Lockwood and Casey Meusel
Resource Conservation District SCC (RCD) – Lizzy Eichorn and Lisa Lurie
Santa Cruz County – Kristen Kittleson, John Ricker, and Sierra Ryan
Regional Water Management Foundation – Darcelle Pruitt
US Fish and Wildlife Service – Chad Mitcham
Thank you to all of the community members who participated in public meetings,
information sessions, and various MGA events. Your input helped to shape this Plan.
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Santa Cruz Mid-County Groundwater Sustainability Plan
SIGNATURE PAGE
The Santa Cruz Mid-County Groundwater Sustainability Plan was prepared under the direction
of a professional geologist licensed in the state of California as required per California Code of
Regulations, Title 23 Section 354.12 consistent with professional standards of practice.
Georgina M. King
P.G. No. 8023, C. HG. No. 874
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Santa Cruz Mid-County Groundwater Sustainability Plan
ACRONYMS
AFY .................acre-feet per year
AMBAG ...........Association of Monterey Bay Area Governments
AMR ................Automated Meter Reading
amsl .................above mean sea level
ASR .................aquifer storage and recovery
Basin ...............Santa Cruz Mid-County Groundwater Basin
bgs ...................below ground surface
BIG ..................Basin Implementation Group
BMP .................Best Management Practices
CASGEM .........California Statewide Groundwater Elevation Monitoring
CCA .................California Coastal Act
CDP .................Coastal Development Permit
CEC .................Constituent of Emerging Concern
CEQA ..............California Environmental Quality Act
CESA ...............California Endangered Species Act
cfs ....................cubic feet per second
CGMA ..............Cooperative Monitoring/Adaptive Groundwater Management Agreement
CGPS ..............Continuous Global Positioning System
CGS .................California Geological Survey
CNDDB ............California Natural Diversity Database
County .............Santa Cruz County
CUPA ..............Certified Unified Program Agency
CWD ................Central Water District
DAC .................disadvantaged community
DDW ................State Water Resources Control Board, Division of Drinking Water
DoD .................Department of Defense
DTW ...............Depth to water
DWR ...............California Department of Water Resources
DWSAP ...........Drinking Water Source Assessment and Protection
EDF .................Environmental Defense Fund
EH ...................Environmental Health
EIR ..................Environmental Impact Report (under CEQA)
EIS ...................Environmental Impact Study (under NEPA)
EPA .................U.S. Environmental Protection Agency
ESA .................Endangered Species Act
ET ....................evapotranspiration
ft/d ...................feet per day
ft/yr ..................feet per year
ft2/d ..................square feet per day
ft msl ................feet above mean sea level
GCM ................global circulation model
GDE .................Groundwater Dependent Ecosystems
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Santa Cruz Mid-County Groundwater Sustainability Plan
GIS ..................geographic information system
GMP ................Groundwater Management Plan
gpd/ft ...............gallons per day per foot
gpm .................gallons per minute
GPS .................global positioning system
GSA ................Groundwater Sustainability Agency
GSFLOW .........Groundwater and Surface-water Flow model
GSP ................Groundwater Sustainability Plan
GWE ...............Groundwater Elevation
HCM ................hydrogeologic conceptual model
IRWM ..............Integrated Regional Water Management
JPA ..................Joint Powers Agreement
LUFT ...............leaking underground fuel tank
MAMP ..............Monitoring and Adaptive Management Plan
MAR ................managed aquifer recharge
µg/L .................microgram per liter
mg/L ................milligrams per liter
MGA ...............Santa Cruz Mid-County Groundwater Agency
MGA Model .....MGA integrated groundwater and surface water model
MMP ................Monitoring and Mitigation Program
MODFLOW .....Modular Finite-difference Flow model
MRMP .............Mitigation Monitoring and Reporting Program
MTBE ..............methyl tertiary-butyl ether
NEPA ...............National Environmental Policy Act
NGVD 29 .........National Geodetic Vertical Datum of 1929
NMFS ..............National Marine Fisheries Service
NRCS ..............Natural Resources Conservation Service
ºC .....................degrees Celsius
ºF .....................degrees Fahrenheit
PET .................potential evapotranspiration
PFAS ...............per- and polyfluoroalkyl substances
ppm .................parts per million
ppt ...................parts per trillion
PRMS ..............Precipitation-Runoff Modeling System
PUC .................Public Utilities Commission
PV Water .........Pajaro Valley Water Management Agency
QA/QC ............quality assurance / quality control
RCD .................Resource Conservation District of Santa Cruz County
RMP ................representative monitoring point
RP ...................reference point potential evapotranspiration
RPE .................reference point elevation
SCADA ...........Supervisory Control aAnd Data Acquisition
SCWD .............City of Santa Cruz Water Department
SFR .................Streamflow-Routing
SGMA .............Sustainable Groundwater Management Act
SLIC ............... Spills-Leaks-Investigations-Cleanup
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Santa Cruz Mid-County Groundwater Sustainability Plan
SMC ................Sustainable Management Criteria
SMGWA ..........Santa Margarita Groundwater Agency
SqCWD ...........Soquel Creek Water District
SSURGO .........Soil Survey Geographic Database
SWRCB ...........State Water Resources Control Board
TAC .................Technical Advisory Committee
TCP .................1,2,3-trichloropropane
TDS .................total dissolved solids
TNC .................The Nature Conservancy
UCMR ..............Unregulated Contaminant Monitoring Rule
USEPA ............U.S. Environmental Protection Agency
USGS ..............U.S. Geological Survey
USDA ..............U.S. Department of Agriculture
UST .................underground storage tank
UWMP .............Urban Water Management Plan
UZF ................ unsaturated-zone flow
VOC .................volatile organic chemical
WAAP ..............Wasteload Allocation Attainment Program
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Santa Cruz Mid-County Groundwater Sustainability Plan
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