Ordinance 2018-06ORDINANCE NO. 2018-06
AN ORDINANCE OF THE CITY COUNCIL OF THE CITY OF
AMENDING THE GILROY CITY CODE BY REMOVING
ARTICLE 30.38 "LANDSCAPING" IN ITS ENTIRETY AND
REPLACING IT WITH A NEW ARTICLE 30.38 ENTITLED
"LANDSCAPING, WATER EFFICIENCY AND
STORMWATER RETENTION AND TREATMENT"
RELATING TO THE INSTALLATION AND MAINTENANCE
OF LANDSCAPING IN EXISTING AND NEW
DEVELOPMENT
WHEREAS, Gilroy City Code, Chapter 30, Section 30.38 pertains to requirements for
installation and maintenance of landscaping in existing and new development; and
WHEREAS, the City promotes the value and benefits of landscaping while recognizing
the need to use limited water resources as efficiently as possible; and.
WHEREAS, the Landscaping, Water Efficiency, and Stormwater Retention and
Treatment Ordinance establishes minimum landscape standards which will result in a variety of
environmental benefits, including controlling soil erosion, enhancing onsite stormwater
management, conserving water, establishing a buffer and/or screen between residential and non-
residential land uses, reducing heat and glare, and ensuring the ongoing maintenance of
landscaped areas; and
WHEREAS, the Planning Commission of the City of Gilroy held a public hearing on
January 4, 2018 to consider the request and reviewed written materials and oral comments
related to the proposed code amendments and recommended that the City Council approve Z17-
08; and
WHEREAS, the Planning Commission of the City of Gilroy has considered the zoning
code amendment request (Z 17 -08), in accordance with the Gilroy Zoning Ordinance, and other
applicable standards and regulations; and
WHEREAS, the subject ordinance amendment is covered under Section 15308 of the
California Environmental Quality Act (CEQA) Guidelines as an action by a regulatory agency
for protection of the environment;
WHEREAS, the Planning Commission hereby recommends the City Council find that
there are no unusual circumstances that would justify an exception to the use of Section 15308 of
the California Environmental Quality Act (CEQA) Guidelines. Such finding is based on
substantial evidence that the ordinance is similar in character and extent to other regulatory
ordinances adopted for the protection of the environment that will have the effect of limiting
damage to environmental resources.
NOW, THEREFORE, THE CITY COUNCIL OF THE CITY OF GILROY DOES
HEREBY ORDAIN AS FOLLOWS:
ORDINANCE NO. 2018-06
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SECTION I
The Gilroy City Code, Chapter 30, Article 38 Landscaping, is deleted in its entirety and replaced
with a new article 30.38 entitled "Landscaping, Water Efficiency and Stormwater Retention and
Treatment" relating to the installation and maintenance of landscaping in existing and new
development as follows:
Article 30.38 Landscaping, Water Efficiency, and Stormwater Retention and Treatment
Sections
30.38. 10 —Purpose
30.38. 20 — Applicability
30.38. 30 — Definitions
30.38.40 — General Landscape Standards
30.38. 50 — Residential Zone Landscape Standards
30.38.60 — Commercial and Mixed -Use Zone Landscape Standards
30.38. 70 — Industrial Zone Landscape Standards
30.38.80 — Landscape Documentation Review Process
30.38.90 — Elements of Landscape Documentation Package
30.38.100 — Water Efficient Landscape Worksheet
30.38.110 —Soil Management Report
30.38.120 — Landscape Design Plan
30.38.130 — Irrigation Design Plan
30.38.140 — Grading Design Plan
30.38.150 — Certificate of Completion
30.38.160 — Irrigation Scheduling
30.38.170 — Landscape and Irrigation Maintenance Schedule
30.38.180 — Irrigation Audit, Irrigation Survey, and Irrigation Water Use Analysis
30.38.190 — Irrigation Efficiency
30.38.200 — Recycled Water
30.38.210 — Graywater Systems
30.38.220 — Stormwater Management and Rainwater Retention
30.38.230 — Public Education
30.38.240 — Provisions for Existing Landscapes
30.38.250 — Water Waste Prevention
30.38.260 — Penalties
30.38.10 Purpose
The City promotes the value and benefits of landscapes while recognizing the need to use limited
water resources as efficiently as possible. In compliance with applicable State standards and
guidelines, and to promote the City's goals and standards regarding sustainable development this
Chapter establishes minimum landscape standards for all uses for enhancing the appearance of
developments, reducing heat and glare, controlling soil erosion, enhancing onsite stormwater
management, conserving water, establishing a buffer and/or screen between residential and non-
residential land uses, and ensuring the ongoing maintenance of landscaped areas. Water
conservation measures shall be addressed through landscape and irrigation design.
30.38.20 Applicability
ORDINANCE NO. 2018-06
A. The provisions of this Chapter shall apply to all of the following landscape projects
installed after December 1, 2015:
1. Projects requiring a Building Permit or Architectural and Site Permit that include
the addition of an aggregate landscape area of 500 square feet or more;
2. Projects requiring a Building Permit or Architectural and Site Permit that include
the rehabilitation of an aggregate landscape area of 2,500 square feet or more;
3. Existing landscaped areas shall comply with the provisions specified in Section
30.38.250 (Existing Landscaping Provisions);
4. Cemeteries.
New and rehabilitated cemeteries shall comply with the provisions
specified in Section 30.38.170 (Landscape and Irrigation Maintenance
Schedule) and Section 30.38.180 (Irrigation Audit, Irrigation Survey, and
Irrigation Water Use Analysis).
Existing cemeteries shall comply with the provisions specified in Section
30.38.240 (Provisions for Existing Landscapes).
B. Projects using treated or untreated graywater (See Section 30.38.210) or rainwater
captured on site, any parcel within the project that has less than 2,500 sq. ft. of landscape
area and meets the parcel's landscape water requirement (Estimated Total Water Use)
entirely with treated or untreated graywater or through stored rainwater captured on site
is subject only to Appendix D (Prescriptive Compliance Option) section (5) of State law.
C. This Chapter does not apply to:
1. Registered local, State or Federal historical sites;
2. Ecological restoration projects that do not require a permanent irrigation system;
3. Mined -land reclamation projects that do not require a permanent irrigation
system; or
4. Existing plant collections, as part of botanical gardens and arboretums open to the
public.
30.38.30 Definitions
Applied Water. Portion of water supplied by the irrigation system to the landscape.
Arborist Report. A report prepared by an arborist certified by the International Society of
Arboriculture (ISA) or equivalent organization acceptable to the Community Development
Director containing specific information on the location, condition, structure, potential impacts
of development, and recommended actions and mitigation measures regarding one or more trees
on an individual lot or project site.
Automatic Irrigation Controller. Timing device used to remotely control valves that operate
an irrigation system. Automatic irrigation controllers are able to self - adjust and schedule
irrigation events using either evapotranspiration (weather- based) or soil moisture data.
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Backflow Prevention Device. Safety device used to prevent pollution or contamination of the
water supply due to the reverse flow of water from the irrigation system.
Certificate of Completion. The document required under Section 30.38.150 (Certificate of
Completion).
Certified Irrigation Designer. Person certified to design irrigation systems by an accredited
academic institution, a professional trade organization or other program such as the US
Environmental Protection Agency's WaterSense irrigation designer certification program and
Irrigation Association's Certified Irrigation Designer program.
Certified Landscape Irrigation Auditor. Person certified to perform landscape irrigation audits
by an accredited academic institution, a professional trade organization or other program such as
the US Environmental Protection Agency's WaterSense irrigation auditor certification program
and Irrigation Association's Certified Landscape Irrigation Auditor program.
Check Valve or Anti-Drain Valve. Valve located under a sprinkler head, or other location in
the irrigation system, to hold water in the system to prevent drainage from sprinkler heads when
the sprinkler is off.
Common Interest Developments. Community apartment projects, condominium projects,
planned developments, and stock cooperatives per Civil Code Section 1351.
Community Development Director. City of Gilroy Community Development Director or
designee.
Compost. Safe and stable product of controlled biologic decomposition of organic materials that
is beneficial to plant growth.
Conversion Factor (0.62). The number that converts acre - inches per acre per year to gallons per
square foot per year.
Distribution Uniformity. Measure of the uniformity of irrigation water over a defined area.
Drip Irrigation. Any non -spray low volume irrigation system utilizing emission devices with a
flow rate measured in gallons per hour. Low volume irrigation systems are specifically designed
to apply small volumes of water slowly at or near the root zone of plants.
Dripline. The outermost edge of the tree's canopy. When depicted on a map or plan, the dripline
is the irregular shaped circle that follows the contour of the tree's branches as seen from
overhead.
Ecological Restoration Project. Project where the site is intentionally altered to establish a
defined, indigenous, historic ecosystem.
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Effective Precipitation or Useful Rainfall (Eppt). Portion of total precipitation which becomes
available for plant growth.
Emitter. A drip irrigation emission device that delivers water slowly from the system to the soil.
Established Landscape. Point at which plants in the landscape have developed significant root
growth into the soil. Typically, most plants are established after one or two years of growth.
Established Period of the Plants. The first year after installing the plant in the landscape or the
first two years if irrigation will be terminated after establishment. Typically, most plants are
established after one or two years of growth. Native habitat mitigation areas and trees may need
three to five years for establishment.
Estimated Total Water Use (ETWU). Total water used for the landscape as described in
Section 30.38.100 (Water Efficient Landscape Worksheet).
ET adjustment factor (ETAF). A factor of 0.55 for residential areas and 0.45 for non-
residential areas, that, when applied to reference evapotranspiration, adjusts for plant factors and
irrigation efficiency, two major influences upon the amount of water that needs to be applied to
the landscape. The ETAF for new and existing (non - rehabilitated) Special Landscape Areas shall
not exceed 1.0. The ETAF for existing non - rehabilitated landscapes is 0.8.
Evapotranspiration Rate. Quantity of water evaporated from adjacent soil and other surfaces
and transpired by plants during a specified time.
Flow Rate. Rate at which water flows through pipes, valves and emission devices, measured in
gallons per minute, gallons per hour, or cubic feet per second.
Flow Sensor. Inline device installed at the supply point of the irrigation system that produces a
repeatable signal proportional to flow rate. Flow sensors must be connected to an automatic
irrigation controller, or flow monitor capable of receiving flow signals and operating master
valves. This combination flow sensor /controller may also function as a landscape water meter or
submeter.
Friable. Soil condition that is easily crumbled or loosely compacted down to a minimum depth
per planting material requirements, whereby the root structure of newly planted material will be
allowed to spread unimpeded.
Fuel Modification Plan Guideline. Guidelines from a local fire authority to assist residents and
businesses that are developing land or building structures in a fire hazard severity zone.
Graywater. Untreated wastewater that has not been contaminated by any toilet discharge, has
not been affected by infectious, contaminated, or unhealthy bodily wastes, and does not present a
threat from contamination by unhealthful processing, manufacturing, or operating wastes.
"Graywater" includes, but is not limited to, wastewater from bathtubs, showers, bathroom
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washbasins, clothes washing machines, and laundry tubs, but does not include wastewater from
kitchen sinks or dishwashers. Health and Safety Code Section 17922.12.
Hardscaped. Any durable material (pervious and non - pervious).
Hydrozone. Portion of the landscaped area having plants with similar water needs and rooting
depth. A hydrozone may be irrigated or non - irrigated.
Infiltration Rate. Rate of water entry into the soil expressed as a depth of water per unit of time
(e.g., inches per hour).
Invasive Plant Species. Species of plants not historically found in California that spread outside
cultivated areas and can damage environmental or economic resources. Invasive species may be
regulated by county agricultural agencies as noxious species. Lists of invasive plants are
maintained at the California Invasive Plant Inventory and USDA invasive and noxious weeds
database.
Irrigation Audit. An in -depth evaluation of the performance of an irrigation system conducted
by a Certified Landscape Irrigation Auditor. An irrigation audit includes, but is not limited to:
inspection, system tune -up, system test with distribution uniformity or emission uniformity,
reporting overspray or runoff that causes overland flow, and preparation of an irrigation
schedule. The audit must be conducted in a manner consistent with the Irrigation Association's
Landscape Irrigation Auditor Certification program or other U.S. Environmental Protection
Agency "Watersense" labeled auditing program.
Irrigation Efficiency (IE). Measurement of the amount of water beneficially used divided by
the amount of water applied. Irrigation efficiency is derived from measurements and estimates of
irrigation system characteristics and management practices. The irrigation efficiency factors for
purposes of this ordinance are 0.75 for overhead spray devices and 0.81 for drip systems.
Irrigation Survey. Evaluation of an irrigation system that is less detailed than an irrigation
audit. An irrigation survey includes, but is not limited to: inspection, system test, and written
recommendations to Irrigation Water Use Analysis. Analysis of water use data based on meter
readings and billing data.
Landscape Architect. Person who holds a license to practice landscape architecture in the state
of California Business and Professions Code, Section 5615.
Landscape Area. All planting areas, turf areas, and water features in a landscape design plan
subject to the Maximum Applied Water Allowance calculation. The landscape area does not
include footprints of buildings or structures, sidewalks, driveways, parking lots, decks, patios,
gravel or stone walks, other pervious or non - pervious hardscapes, and other non - irrigated areas
designated for non - development (e.g., open spaces and existing native vegetation).
ORDINANCE NO. 2018-06
Landscape Contractor. Person licensed by the state of California to construct, maintain, repair,
install, or subcontract the development of landscape systems.
Landscape Documentation Package. Documents required under Section 30.38.090 (Elements
of the Landscape Documentation Package).
Landscape Project. Total area of landscape in a project as defined in "landscape area" for the
purposes of this ordinance, meeting requirements under Section 30.38.020 (Applicability).
Landscape Water Meter. Incline device installed at the irrigation supply point that measures
the flow of water into the irrigation system and is connected to a totalizer to record water use.
Lateral Line. Water delivery pipeline that supplies water to the emitters or sprinklers from the
valve.
Local Agency. A city or county, including a charter city or charter county, that is responsible
for adopting and implementing the ordinance. The local agency is also responsible for the
enforcement of this ordinance, including but not limited to, approval of a permit and plan check
or design review of a project.
Local LAN Purveyor. Any entity, including a public agency, city, county, or private water
company that provides retail water service.
Low Volume Irrigation. Application of irrigation water at low pressure through a system of
tubing or lateral lines and low- volume emitters such as drip, drip lines, and bubblers. Low
volume irrigation systems are specifically designed to apply small volumes of water slowly at or
near the root zone of plants.
Low Water Plant Use. Plant species whose demonstrated water needs are compatible with local
climate and soil conditions such that regular supplemental irrigation is not required to sustain the
plant after it has become established. Species classified as "very low water use" and "low water
use" by WUCOLS, having a regionally adjusted plant factor of 0.0 through 0.3, shall be
considered low water use plants.
Main Line. Pressurized pipeline that delivers water from the water source to the valve or outlet.
Master Shut Off Valve. Automatic valve installed at the irrigation supply point which controls
water flow into the irrigation system. When this valve is closed, water will not be supplied to the
irrigation system. A master valve will greatly reduce any water loss due to a leaky station valve.
Maximum Applied Water Allowance (MAWA). Upper limit of annual applied water for the
established landscaped area as specified in Section 30.38.100 (Water Efficient Landscape
Worksheet). It is based upon the area's reference evapotranspiration, the ET Adjustment Factor,
and the size of the landscape area.
ORDINANCE NO. 2018-06
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Estimated Total Water Use shall not exceed the Maximum Applied Water Allowance.
Special Landscape Areas, including recreation areas, areas permanently and solely dedicated to
edible plants such as orchards and vegetable gardens, and areas irrigated with recycled water are
subject to the MAWA with an ETAF not to exceed 1.0. MAWA = (ETo) (0.62) [(ETAF x LA) +
((1 -ETAF) x SLA)]
Median. Area between opposing lanes of traffic that may be unplanted or planted with trees,
shrubs, perennials, and ornamental grasses.
Microclimate. Climate of a small, specific area that may contrast with the climate of the overall
landscape area due to factors such as wind, sun exposure, plant density, or proximity to reflective
surfaces.
Mined -Land Reclamation Projects. Any surface mining operation with a reclamation plan
approved in accordance with the Surface Mining and Reclamation Act of 1975.
Mulch. Any organic material such as leaves, bark, straw, compost, or inorganic mineral
materials such as rocks, gravel, or decomposed granite left loose and applied to the soil surface
for the beneficial purposes of reducing evaporation, suppressing weeds, moderating soil
temperature, and preventing soil erosion.
New Construction. A new building with a landscape or other new landscape, such as a park,
playground, or greenbelt without an associated building.
Non - Residential Landscape. Landscapes in commercial, institutional, industrial and public
settings that may have areas designated for recreation or public assembly. It also includes
portions of common areas of common interest developments with designated recreational areas.
Operating Pressure. Pressure at which the parts of an irrigation system are designed by the
manufacturer to operate.
Overhead Sprinkler Irrigation Systems or Overhead Spray Irrigation Systems. Systems that
deliver water through the air (e.g., spray heads and rotors).
Overspray. Irrigation water which is delivered beyond the target area.
Parkway. Area between a sidewalk and the curb or traffic lane. It may be planted or unplanted,
and with or without pedestrian egress.
Permit. Authorizing document issued by local agencies for new construction or rehabilitated
landscapes.
Planting Hole. A hole in the ground that is dug for landscaping materials such as trees or shrubs.
Pervious. Any surface or material that allows the passage of water through the material and into
the underlying soil.
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Plant Factor or Plant Water Use Factor. A factor that, when multiplied by ETo, estimates the
amount of water needed by plants. For purposes of this ordinance, the plant factor range for very
low water use plants is 0 to 0. 1, the plant factor range for low water use plants is 0.1 to 0. 3, the
plant factor range for moderate water use plants is 0.4 to 0.6, and the plant factor range for high
water use plants is 0.7 to 1.0. Plant factors cited in this ordinance are derived from the
publication "Water Use Classification of Landscape Species ". Plant factors may also be obtained
from horticultural researchers from academic institutions or professional associations as
approved by the California Department of Water Resources (DWR).
Project Applicant. Individual or entity submitting a Landscape Documentation Package
required under Section 492.3 of Title 23 of the California Code of Regulations, to request a
permit, plan check, or design review from the local agency. A project applicant may be the
property owner or his or her designee.
Public Works Director. City of Gilroy Public Works Director or designee.
Rain Sensor or Rain Sensing Shutoff Device. A component which automatically suspends an
irrigation event when it rains.
Record Drawing or As- Builts. Set of reproducible drawings which show significant changes in
the work made during construction and which are usually based on drawings marked up in the
field and other data furnished by the contractor.
Recreational Area. Areas, excluding private single family residential areas, designated for
active play, recreation or public assembly in parks, sports fields, picnic grounds, amphitheaters
or golf course tees, fairways, roughs, surrounds and greens.
Recycled Water, Reclaimed Water, or Treated Sewage Effluent Water. Treated or recycled
waste water of a quality suitable for non - potable uses such as landscape irrigation and water
features. This water is not intended for human consumption.
Reference Evapotranspiration (ETo). Standard measurement of environmental parameters
which affect the water use of plants. ETo is expressed in inches per day, month, or year as
represented in Appendix A, and is an estimate of the evapotranspiration of a large field of four -
to seven -inch tall, cool - season grass that is well watered. Reference evapotranspiration is used as
the basis of determining the Maximum Applied Water Allowances so that regional differences in
climate can be accommodated.
Regional Water Efficient Landscape Ordinance. A Local Ordinance adopted by two or more
local agencies, water suppliers and other stakeholders for implementing a consistent set of
landscape provisions throughout a geographical region. Regional ordinances are strongly
encouraged to provide a consistent framework for the landscape industry and applicants to
adhere to.
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Rehabilitated Landscapes. Any re- landscaping project that requires a permit, plan check, or
design review, meets the requirements of Section 30.38.020 (Applicability), and the modified
landscape area is equal to or greater than 2,500 square feet.
Residential Landscape. Landscapes surrounding single or multifamily homes.
Root Zone. A specifically defined area commencing at the trunk and moving outward to form
an irregularly shaped circle that follows the contour of the tree canopy and extending beyond the
dripline of the tree by five feet or such greater distance determined by the Arborist Report.
Run -Off. Water which is not absorbed by the surface to which it is applied and flows from the
area to a drain, sewer, or stream. For example, run off may result from water that is applied to
landscaping at too great a rate (application rate exceeds infiltration rate) or when there is a slope.
Soil Moisture Sensing Device or Soil Moisture Sensor. Device that measures the amount of
water in the soil. The device may also suspend or initiate an irrigation event.
Soil Texture. Classification of soil based on its percentage of sand, silt, and clay.
Special Landscape Area (SLA). Area of the landscape dedicated solely to edible plants,
recreational areas, areas irrigated with recycled water, or water features using recycled water.
Sprinkler Head or Spray Head. Device which delivers water through a nozzle.
Static Water Pressure. Pipeline or municipal water supply pressure when water is not flowing.
Station. Area served by one valve or by a set of valves that operate simultaneously.
Swing Joint. Irrigation component that provides a flexible, leak -free connection between the
emission device and lateral pipeline to allow movement in any direction and to prevent
equipment damage.
Submeter. Metering device to measure water applied to the landscape that is installed after the
primary utility water meter.
Turf. Groundcover surface of mowed grass. Annual bluegrass, Kentucky bluegrass, Perennial
ryegrass,
Red fescue and Tall fescue are cool- season grasses. Bermuda grass, Kikuyu grass, Seashore
Paspalum, St. Augustine grass, Zoysia grass, and Buffalo grass are warm - season grasses.
Valve. Device used to control the flow of water in the irrigation system.
Water Conserving Plant Species. Plant species identified as having a very low or low plant
factor.
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Water Feature. Design element where open water performs an aesthetic or recreational
function. Water features include ponds, lakes, waterfalls, fountains, artificial streams, spas, and
swimming pools (where water is artificially supplied). The surface area of water features is
included in the high -water use hydrozone of the landscape area. Constructed wetlands used for
on -site wastewater treatment or stormwater best management practices that are not irrigated and
used solely for water treatment or stormwater retention are not water features and, therefore, are
not subject to the water budget calculation.
Watering Window. Time of day irrigation is allowed.
WUCOLS. Water Use Classification of Landscape Species published by the University of
California Cooperative Extension and the Department of Water Resources 2014.
30.38.030 General Landscape Standards
A. General Landscape Design Standards. Landscaping shall be a positive element of the
project design. The landscaping shall be designed to protect stormwater quality and
enhance the aesthetic quality of the development by using the following design standards:
1. Landscaping shall be used to manage and treat stormwater to the maximum extent
feasible.
2. All plant materials shall be installed in compliance with an approved Landscape
Design Plan (see Section 30.38.120);
3. Only healthy, well - formed, and vigorous plant materials may be used;
4. Landscaping shall be located in all yard areas that are not specifically used for
parking, driveways, patios, or similar purposes, unless otherwise specified in this
chapter. Sidewalks, pedestrian walks and pathways are permitted in landscaped
areas.
5. Landscape areas shall incorporate varieties of plant textures, colors, geometries,
and leaf densities. Year around visual interest shall be introduced through an
appropriate balance of evergreen/deciduous and flowering perennials.
Architectural depth and character shall be incorporated through a variety of plant
sizes, shapes, and heights;
6. Dense landscaping shall be incorporated to provide a visual screen from less
pleasing features of a development (i.e., around trash enclosures, carports, pool
equipment, electric transformers, cable boxes, etc.); however, landscaping shall
not be placed to interfere with the accessibility to and maintenance of the
structures and/or equipment;
Landscaping shall screen parking areas from adjacent streets;
8. Landscaping shall be incorporated to reduce monotony of long expanses of
building, fence or other structures.
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9. The density and placement of plants are to be determined by the plant size at
maturity. When initially installed, groundcover shall give enough coverage for a
pleasing appearance on all landscaped areas;
10. A minimum of 50% of the landscape area shall consist of plant materials
consistent with Section 30.38.120 B. Landscape Design Requirements of this
Chapter. Portions of the landscape area not planted shall be covered with
permeable ground coverings, e.g., rock, bark, decomposed granite or similar
materials.
11. Sturdy raised curbs shall protect all landscape areas from driveways and parking
areas. Cutouts in curbs may be incorporated when surrounding vegetative
drainage swales, stormwater retention features and/or other treatment features.
12. Wheel stops need not be provided in parking areas where the front two feet of the
landscape area is planted with low groundcover to accommodate car overhang;
13. Trees of varieties with broad canopies shall be provided to shade walkways and
parking areas to temper heat from paved areas, and to screen long structure
frontages;
14. Existing onsite vegetation shall be preserved, unless determined otherwise by the
Community Development Director, to maintain onsite water quality and sediment
control;
15. New plant materials requiring permanent irrigation shall not be placed under
existing oak trees;
16. All trees shall be a minimum size of 15 gallons when initially installed;
17. Protected trees shall be preserved and enhance by structure site design, in
compliance with Subsection D, below;
18. Deep root irrigation shall be provided to prevent pavement damage where trees
are planted within three feet of City pavement or sidewalks. Deep root irrigation
is strongly encouraged in similar situations in all private development. When
required, deep root irrigation shall be installed in compliance with City standards;
19. Roof -top runoff shall be directed to vegetated areas.
20. Landscaping is allowed within cul -de -sacs in conformance with all other City
Codes.
21. All plant materials within the City right -of -way (e.g., medians, sound walls, etc.)
shall be approved by the Director of Public Works for minimum size and species
type;
22. Green roofs are allowed in conformance to all requirements of City Code.
23. All plant materials shall be maintained in a live and healthy condition, and free of
weeds. Except for owners of properties in the RI zoning district, property owners
shall be required to remove weeds and maintain the landscaping in accordance
with the approved landscape plan for the life of the property.
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B. New Plant Material. New plant material shall be carefully selected to comply with the
following standards:
1. The overall compatibility of the ultimate form, size, density, and color of trees,
shrubs, and groundcover at maturity;
2. The tolerance of the plant materials to existing physical conditions, and resistance
to insect pests, and disease; and
3. The intended use (i.e., shade screening, windbreak, erosion control, stormwater
treatment and management, etc.) as well as the ease of maintenance.
4. indigenous trees and other plant materials is encouraged.
C. City Street Trees.
1. In all zones, the developer or applicant shall install street trees in the public right -
of -way, in compliance with City Street Tree Standards. A properly licensed
landscape contractor shall install the street tree. A Street Tree Permit shall be
obtained by the applicant and/or developer prior to issuance of the Building
Permit.
2. An inspection of the placement and tree type is required when a new tree is either
planted or replaced.
3. Street trees are not required in the RH (Residential Hillside) zone.
4. Street trees shall be selected and installed in compliance with the following
standards:
a. Street trees shall be planted in the public right -of -way in compliance with
a City Standard Detail Plan;
b. Street trees shall be a minimum of 15 gallons when initially installed.
Where an existing street tree must be removed to accommodate
development, a replacement tree of similar size as that removed shall be
planted;
C. All street trees shall be irrigated with an automatic irrigation system
d. The developer and/or applicant shall use the tree species as designated by
the City's Master Street Tree Planting Plan (as authorized under City Code
Section 26.51). The developer and/or applicant may request in writing a
substitution of the designated tree species, subject to approval by the
Director of Public Works;
e. Spacing of trees shall be 30 feet on center, unless otherwise approved by
the Director of Public Works.
f. Street trees shall be spaced at least 10 feet from sewer laterals and street
lights, and at least five feet from water laterals, gas laterals, fire hydrants,
driveway aprons, and telephone /cable /electrical junction boxes;
g. When required, the developer and/or applicant shall install street trees
adjacent to sound walls and in medians.
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Deep root irrigation shall be provided for street trees in sidewalk cutouts.
When required, deep root irrigation and tree well coverings shall be
installed in compliance with City Standard Detail plans;
No person shall construct or place any concrete, brick, asphalt, wood
product, plastic sheeting, or other material impervious to air and water
around the base of any street tree or within three feet. In addition, no
excess soil, mulch, or other organic /inorganic material shall be placed
above a tree's root crown within three feet; and
Street trees planted by the developer and/or applicant shall be guaranteed
to remain healthy and grow for a minimum of one (1) year. All
workmanship on irrigation systems shall be guaranteed for one year after
final acceptance by the City;
D. Protected Trees.
1. The Community Development Director shall determine if existing trees qualify as
Protected Trees, a Community of Protected Trees or Heritage Trees. Refer to Section
30.38.270 Protected Tree Removal for the definitions of Protected Trees, a
Community of Protected Trees or Heritage Trees.
2. An arborist report shall be required for any application for discretionary
development approval for which the project site includes existing Protected Trees, as
defined in Section 30.38.270 (b). The arborist report shall include all information
specified in Section 30.38.270 (d). The arborist report shall specify all necessary
measures to ensure that Protected Trees identified to remain are protected throughout
the construction process. The cost for preparation of the arborist report and city
review of it shall be at the sole expense of the applicant. All arborist
recommendations shall be listed on the final landscape plans.
3. The arborist shall sign the final landscape plans certifying that the plan is consistent
with the recommendations made in the arborist report.
4. At least three scheduled inspections shall be made by the City and/or the arborist, at
the direction of the City to ensure compliance with the recommendations of the
arborist report. The inspections shall, at a minimum include the following: (1) Initial
inspection prior to any construction or grading, (2) After completion of rough
grading and/or trenching, and (3) Completion of all work including planting and
irrigation system installation. Other inspections may be conducted as required by
the Community Development Director.
Unless otherwise permitted by the City, no structure, excavation, or impervious
surface areas of any kind shall be constructed or installed within the root zone of any
protected tree or Heritage Tree without mitigating special design, such as post and
beam footings that bridge roots. No parking, storing vehicles equipment or other
materials shall be permitted within the dripline of any protected tree without special
design considerations approved by the Community Development Director.
6. All protected trees, community of protected trees or heritage tree(s), shall be
maintained in good health by the property owner, applicant and/or developer until
approved for removal by an approved Protected Tree Removal Permit or other
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discretionary Planning Department application. 30.38.050Residential Zone
Landscape Standards
30.38.050 Residential Zone Landscape Standards
A. General Residential Zone Landscape Standards. Residential development located in
the RI, R2, R3, R4 zones, Planned Development zones and downtown specific plan
zones, (and excluding the RH zone), shall incorporate landscaping in all yard areas that
are not specifically used for driveways, walkways, patios, or similar purposes. In the R -2,
R -3, R -4 and Planned Development zones and Specific Plan areas, at least 35 percent of
the required landscaped area shall be designed to be usable as open recreational area.
Landscaping shall be used to manage and treat stormwater to the maximum extent
feasible.
B. RH Residential Hillside Zone. Areas within the Residential Hillside Zoning District are
designated as the "City of Gilroy Wildland -Urban Fire Interface Area" under the City
Code. Residential development in the RH zone shall provide landscaping consistent with
the following standards:
1. Development in forested areas shall be carefully designed to minimize removal or
damage to existing trees and to allow their continued healthy existence;
2. New landscaping placed within 15 feet from any structure shall consist of selected
vegetation with low - growing characteristics; and
3. A landscape design plan for projects in the RH Residential Hillside Zone shall
incorporate all requirements of City Code Article 10. Fire Code, as amended.
30.38.060 Commercial Zone Landscape Standards
Landscaping in Commercial zones shall be designed using the following standards and shall
enhance the aesthetic quality of the development by using the following requirements:
A. All development in commercial and mixed -use zones shall provide a minimum of 21 feet
of landscaping, measured from face of curb, adjacent to public streets (public sidewalks
may be permitted in the landscape area);
B. At least eight percent of the gross total land area of the site, outside of the public right -of-
way, shall be landscaped, except in the Downtown Specific Plan zones where there are
typically no front and side yard setbacks;
C. All portions of a site over 40 square feet in area not specifically used for buildings,
parking, driveways, walkways, or similar uses shall be landscaped;
D. In all landscaped areas, trees shall be planted on average every 20 feet on center or with a
greater spacing as appropriate to maintain proper tree health as determined by a licensed
landscape architect; Clustering of trees may be permitted with the approval of the
Director of Public Works;
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E. Parking lot landscape islands with a minimum of 50 square feet in area, and including a
tree, shall be located in parking lots every twelve stalls, and shall be evenly distributed
throughout the parking area;
F. All landscape areas shall be at least five feet wide, except as approved by the Community
Development Director due to specific site situations where the minimum width is
impractical;
G. Parking lot landscape areas containing trees shall be a minimum of eight feet wide,
except as approved by the Community Development Director due to specific site
situations where the minimum width is impractical;
H. Parking areas shall be screened from view from adjacent residential areas and streets,
except at driveways and street corners where visibility is needed;
I. Landscaping shall be used to manage and treat stormwater to the maximum extent
feasible.
J. Three (3) foot high screening shall be located where necessary in commercial parking
lots and drive- through uses to block headlights from shining into adjacent residential
areas.
30.38.070 Industrial Zone Landscape Standards
Landscaping in Industrial zones shall be designed to using the following standards and shall
enhance the aesthetic quality of the development by using the following requirements:
A. Landscape the front and side yard areas adjacent to streets, as required by this chapter,
which are not specifically used for parking, driveways, walkways, loading areas, or
similar paved access areas;
B. Landscaping areas located adjacent to the street right -of -way shall be a minimum of 21
feet wide (measured from the face of curb);
C. Paved areas shall not exceed 50 percent of the total area of setbacks;
D. All industrial zones shall provide landscape areas that are a minimum of five feet in
width along the entire perimeter of the site;
E. A minimum eight- foot -wide landscaped buffer is required adjacent to commercial or
residential uses;
F. Fences and walls shall complement the structure architecture and landscaping. Long
structure expanse shall be architecturally designed or landscaped to prevent monotony.
G. Outdoor use areas, and loading areas shall be screened by landscaping and/or materials
integral with the structure design;
H. Industrial development visible from US 101 shall be screened from view with dense
landscaping.
Three (3) foot high screening shall be located where necessary in industrial parking lots
and drive- through uses to block headlights from shining into adjacent residential areas.
30.38.080 Landscape Documentation Review Process
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A. Landscape Documentation Package Required. The project developer and /or applicant
shall submit a Landscape Documentation Package, in compliance with Section 30.38.90
(Elements of the Landscape Documentation Package), below to the Community
Development Director for approval.
B. Landscape Documentation Package Submittal. The Landscape Documentation
Package shall be submitted in conjunction with the building permit for the project and
shall be approved prior to issuance of the building permit.
C. Following Completion of Installation. Following final approval of the installation of
landscaping by the city, , the project developer and/or applicant shall:
1. Receive documentation of the approval in a form provided by the Community
Development Director and shall record the date of the permit in the Certificate of
Completion;
2. Submit a copy of the approved Landscape Documentation Package along with the
record drawings, and any other information to the property owner or his/her
designee; and
3. Submit a copy of the Water Efficient Landscape Worksheet to the local water
purveyor.
30.38.090 Elements of the Landscape Documentation Package
At a minimum, the Landscape Documentation Package shall be provided in a form required by
the Community Development Director and shall include the following components, as described
in this chapter: water efficient landscape worksheet, soil management report, landscape design
plan, irrigation design plan, and grading design plan.
30.38.100 Water Efficient Landscape Worksheet Completion of Worksheet.
Project applicants and/or developers shall complete the Water Efficient Landscape Worksheet
which contains information on the plant factor, irrigation method, irrigation efficiency, and area
associated with each hydrozone. The Estimated Total Adjustment Factor (ETAF) for a landscape
project is based on the plant factors and irrigation methods selected. In calculating the Maximum
Applied Water Allowance and Estimated Total Water Use, a project developer /applicant shall
use the ETo values for Gilroy.
A. Evapotranspiration (ETo). The Community Development Director shall provide and
annually update the evapotranspiration rate for the City using the rates provided by the
California Irrigation Management Information System (CIMIS).
B. Water Budget Calculations. Water budget calculations shall adhere to all of the
following requirements:
The plant factor used shall be from the Water Use Classification of Landscape
Species (WUCOLS) or from horticultural researchers with academic institutions
or professional associations as approved by the California Department of Water
Resources (DWR). The plant factor ranges from 0 to 0.1 for very low water using
plants, 0.1 to 0.3 for low water use plants, from 0.4 to 0.6 for moderate water use
plants, and from 0.7 to 1.0 for high water use plants.
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2. All water features shall be included in the high -water use hydrozone and
temporarily irrigated areas shall be included in the low water use hydrozone.
3. All Special Landscape Areas shall be identified and their water use calculated as
shown below.
ETAF for new and existing (non - rehabilitated) Special Landscape Areas shall not
exceed 1.0.
C. Maximum Applied Water Allowance Calculation
The Maximum Applied Water Allowance is calculated based on the maximum ETAF
allowed (0.55 for residential areas and 0.45 for non - residential areas) and expressed as
annual gallons required, exclusive of Special Landscape Areas.
MAWA (Annual Gallons Allowed) = (ETo) (0.62) [(ETAF x LA) + ((1 -ETAF) x SLA)]
Residential Areas:
MAWA (Annual Gallons Allowed) = (ETo) (0.62) [(0.55 x LA) + ((1 -0.55) x SLA)]
Non - Residential Areas
MAWA (Annual Gallons Allowed) = (ETo) (0.62) [(0.45 x LA) + ((1 -0.45) x SLA)]
Where:
MAWA = Maximum Applied Water Allowance (Annual Gallons Allowed)
ETo = Reference Evapotranspiration (inches per year)
0.62 = Conversion Factor (to gallons)
0.55 = ET Residential Adjustment Factor (ETAF)
0.45 = ET Non - Residential Adjustment Factor (ETAF)
SLA = Special Landscape Area (square feet)
D. Estimated Total Water Use Calculation
The Estimated Total Water Use (ETWU) is calculated based on the plants used and
irrigation method selected for the landscape design. The sum of the ETWU shall not
exceed the MAWA.
ETTT -U = (ETo)(0.62) PIE 4 SL4
Where:
ETWU = Estimated Total Water Use per year (gallons)
ETo = Reference Evapotranspiration (inches per year)
PF = Plant Factor from WUCOLS
HA = Hydrozone Area [high, medium, and low water use areas] (square feet)
SLA = Special Landscape Area (square feet)
0.62 = Conversion Factor (to gallons)
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IE = Irrigation Efficiency 0.75 for spray head, and 0.81 for drip
E. Effective Precipitation (EPPT). The Director may consider Effective Precipitation (25
percent of annual precipitation) in tracking water use and may use the following equation
to calculate MAWA:
Residential Areas:
MAWA (Annual Gallons Allowed) _ (ETo -EPPT) (0.62) [(0.55 x LA) + ((1 -0.55) x
SLA)]
Non - Residential Areas:
MAWA (Annual Gallons Allowed) _ (ETo -EPPT) (0.62) [(0.45 x LA) + ((1 -0.45) x
SLA)]
30.38.110 Soil Management Report
In order to reduce runoff and encourage healthy plant growth, a soil management report shall be
completed by the project developer /applicant, or his/her designee, as follows:
A. Soil samples shall be submitted to a laboratory for analysis and recommendations.
Soil sampling shall be conducted in compliance with laboratory protocol,
including protocols regarding adequate sampling depth for the intended plants.
The soil analysis shall include:
a. soil texture;
b. infiltration rate determined by laboratory test or soil texture infiltration
rate table;
C. pH;
d. total soluble salts;
e. sodium;
percent organic matter; and
recommendations.
In projects with multiple landscape installations (i.e. production home
developments) a soil sampling rate of one in seven lots or approximately 15
percent will satisfy this requirement. Large landscape projects shall sample at a
rate equivalent to one in seven parcels.
B. The project applicant and/or developer, or his/her designee, shall comply with one of the
following:
If significant mass grading is not planned, the soil analysis report shall be
submitted as part of the Landscape Documentation Package; or
2. If significant mass grading is planned, the soil analysis report shall be submitted
as part of the Certificate of Completion.
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C. The soil analysis report shall be made available, in a timely manner, to the professionals
preparing the water plans and irrigation design plans to make any necessary adjustments
to the design plans.
D. The project developer /applicant, or his/her designee, shall submit documentation
verifying implementation of soil analysis report recommendations with the Certificate of
Completion.
30.38.120 Landscape Design Plan
A. Landscape Design Plan Details Required.
A Landscape Design Plan at a minimum shall be required and shall specify the items
detailed below. Special design attributes may require detail drawing and /or the submittal
of manufacture's literature.
1. Locate and identify all landscaping planting material, including trees, shrubs,
groundcover, and turf. Planting symbols shall be clearly drawn. Tree staking,
installation, soil preparation details, and any other applicable planting and
installation details shall be provided;
2. Reference planting symbols, specifying botanical name, common name, container
size, spacing, and quantities;
3. Locate all existing mature trees, noting biological name, common name, and
approximate trunk size, measured at four feet above existing grade. Note trees to
be removed, relocated on -site, and/or maintained in place;
4. Delineate and label each hydrozone by number, letter, or other method;
5. Identify each hydrozone as low, moderate, high water, or mixed -use water.
Temporarily irrigated areas of the landscape shall be included in the low water
use hydrozone for the water budget calculation;
6. Identify recreational areas;
7. Identify areas permanently and solely dedicated to edible plants;
8. Identify areas irrigated with recycled water;
9. Identify type of mulch and application depth;
10. Identify soil amendments, type, and quantity;
11. Identify type and surface area of water features;
12. Identify all paving and hardscapes (pervious and non - pervious);
13. Locate and identify the height of all walls, fences, and gates;
14. Locate and identify all outdoor amenity features, including but not limited to
trellises, gazebos, play equipment, picnic tables, and benches;
15. Locate and identify property lines, streets, street names, driveways, walkways,
and other paved areas;
16. Identify existing and proposed structures, including pad elevations, if applicable;
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17. Identify natural features including but not limited to rock outcroppings, existing
trees and shrubs that will remain;
18. Identify location, installation details, and 24 -hour retention or infiltration capacity
of any applicable stormwater best management practices (BMP) that encourage
on -site retention and infiltration of stormwater. Applicants shall refer to the City
or Regional Water Quality Control Board for information on any applicable
stormwater technical requirements. Stormwater BMP's shall be incorporated into
the landscape design plan to the maximum extent practicable. Examples shall
include, but are not limited to:
a. Infiltration beds, swales, and basins that allow water to collect and soak
into the ground;
b. Constructed wetlands and retention ponds that retain water, handle excess
flow, and filter pollutants; or
C. Pervious or porous surfaces (e.g., permeable pavers or blocks, pervious or
porous concrete, etc.) that minimize runoff.
19. Identify any applicable rain harvesting or catchment technologies, and their 24-
hour retention or infiltration capacity;
20. Contain the following statement: "I have complied with the standards of the
Chapter and applied them for the efficient use of water in the landscape design
plan"; and
21. Bear the signature of a licensed landscape architect, licensed landscape contractor,
or any other person authorized to design a landscape.
B. Landscape Design Requirements
For the efficient use of water, a landscape shall be carefully designed and planned for the
intended function of the project. A landscape design plan, at a minimum, shall meet the
following design standards and shall be submitted as part of the Landscape
Documentation Package.
Plant Material.
a. Any plant may be selected for the landscape, providing the Estimated
Total Water Use in the landscape area does not exceed the Maximum
Applied Water Allowance. Methods to achieve water efficiency may
include one or more of the following:
(1) Protection and preservation of native species and natural
vegetation;
(2) Selection of water - conserving plant, tree and turf species,
especially local native plants;
(3) Selection of plants based on local climate suitability, disease, and
pest resistance;
(4) Selection of trees as specified in Section3 0.3 8.040 (General
Landscape Standards);
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(5) Selection of plants from the approved City plant list.
b. Each hydrozone shall have plant materials with similar water use, except
for hydro zones with plants of mixed water use.
C. Plants may be selected and planted appropriately based upon their
adaptability to the climatic, geologic, and topographical conditions of the
project site. Methods to achieve water efficiency shall include one or more
of the following:
(1) Plant selection shall be from the Sunset Western Climate Zone
System which considers temperature, humidity, elevation, terrain, latitude,
and varying degrees of continental and marine influence on local climate;
or
(2) Recognize the horticultural attributes of plants (i.e., mature plant
size, invasive surface roots) to minimize damage to property or
infrastructure [e.g., structures, sidewalks, power lines]; allow for adequate
soil volume for healthy root growth; or
(3) Consider the solar orientation for plant placement to maximize
summer shade and winter solar gain.
d. Turf is not allowed on slopes greater than 25 percent where the toe of the
slope is adjacent to an impermeable hardscape and where 25 percent
means one foot of vertical elevation change for every four feet of
horizontal length (rise divided by run x 100 = slope percent).
e. High water use plants, characterized by a plant factor of 0.7 to 1.0, are
prohibited in street medians.
f. The use of invasive plant species (i.e., those listed by the California
Invasive Plant Council), is strongly discouraged.
g. The architectural guidelines of a common interest development, which
include community apartment projects, condominiums, planned
developments, and stock cooperatives, shall not prohibit, or include
conditions that have the effect of prohibiting, the use of low -water use
plants.
2. Water Features.
Recirculating water systems shall be used for all water features.
b. Where available, recycled water shall be used as a source for decorative
water features.
C. Surface area of a water feature shall be included in the high -water use
hydrozone area of the water budget calculation.
Pool and spa covers are highly recommended.
Soil Preparation, Mulch and Amendments.
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a. Prior to the planting of any materials, compacted soils shall be
transformed to a friable condition. On engineered slopes, only amended
planting holes need meet this requirement.
b. Soil amendments shall be incorporated according to recommendations of
the soil report and what is appropriate for the plants selected.
C. For landscape installations, compost at a minimum rate of four cubic yards
per 1,000 square feet of permeable area shall be incorporated to a
minimum depth of six inches into the soil. Soils with greater than six
percent organic matter in the top six inches of soil are exempt from adding
compost and tilling.
d. A minimum three -inch layer of mulch shall be applied on all exposed soil
surfaces of planting areas except in turf areas, creeping or rooting
groundcovers, or direct seeding applications where mulch is
contraindicated. To provide habitat for beneficial insects and other
wildlife, up to five percent of the landscape area may be left without
mulch. Designated insect habitat must be included in the landscape design
plan.
e. Stabilizing mulching products shall be used on all slopes that meet current
engineering standards.
The mulching portion of the seed/mulch slurry in hydro- seeded
applications shall meet the mulching requirement.
Organic mulch materials made from recycled or post - consumer processes
shall take precedence over inorganic materials or virgin forest products
unless the recycled post - consumer organic products are not locally
available. Organic mulches are not required where prohibited by local
Fuel Modification Plan Guidelines or other applicable local ordinances.
30.38.130 Irrigation Design Plan
A. Irrigation Design Plan Details Required.
An Irrigation Design Plan is required and shall include all of the information detailed
below. It shall be separate from but use the same format and scale as the landscape design
plan.
1. Location and size of separate water meters for landscape;
2. Location, type, and size of all components of the irrigation system, including
controllers, main and lateral lines, valves, sprinkler heads, moisture sensing
devices, rain switches, quick couplers, pressure regulators, and backflow
prevention devices;
3. Static water pressure at the point of connection to the public water supply;
4. Flow rate (gallons per minute), application rate (inches per hour), and design
operating pressure (pressure per square inch) for each station;
5. Recycled water irrigation systems;
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6. The following statement: "I have complied with the standards of this Chapter and
applied them accordingly for the efficient use of water in the irrigation design
plan"; and
7. The signature of a licensed landscape architect, certified irrigation designer,
licensed landscape contractor, or any other person authorized to design an
irrigation system.
B. Irrigation Design Requirements
This Section applies to landscaped areas requiring permanent irrigation, not areas that
require temporary irrigation solely for the plant establishment period. For the efficient
use of water, an irrigation system shall meet the requirements listed in this Section and
the manufacturers' recommendations. The irrigation system and its related components
shall be planned and designed to allow for proper installation, management, and
maintenance. An irrigation design plan meeting the following design standards shall be
submitted as part of the Landscape Documentation Package.
1. System.
a. Landscape water meters shall be installed for all non - residential irrigated
landscapes of at least 1,000 sq. ft. but not more than 5,000 sq. ft. (the level
at which Water Code 535 applies) and residential irrigated landscapes of
5,000 sq. ft. or greater. A landscape water meter may be either:
(1) A customer service meter dedicated to landscape use provided by
the local water purveyor; or
(2) A privately -owned meter or submeter.
b. Automatic irrigation controllers using either evapotranspiration or soil
moisture sensor data utilizing non - volatile memory shall be required for
irrigation scheduling in all irrigation systems.
C. If the water pressure is below or exceeds the recommended pressure of the
specified irrigation devices, the installation of a pressure regulating device
is required to ensure that the dynamic pressure at each emission device is
within the manufacturer's recommended pressure range for optimal
performance.
(1) If the static pressure is above or below the required dynamic
pressure of the irrigation system, pressure - regulating devices (i.e., inline
pressure regulators, booster pumps), or other devices shall be installed to
meet the required dynamic pressure of the irrigation system.
(2) Static water pressure, dynamic or operating pressure, and flow
reading of the water supply shall be measured at the point of connection.
These pressure and flow measurements shall be conducted at the design
stage. If the measurements are not available at the design stage, the
measurements shall be conducted at installation.
d. Sensors (i.e., rain, freeze, wind, etc.), either integral or auxiliary, that
suspend or alter irrigation operation during unfavorable weather
conditions shall be required on all irrigation systems, as appropriate for
ORDINANCE NO. 2018-06
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local climatic conditions. Irrigation shall be prohibited during windy or
freezing weather or during rain.
e. Manual shut -off valves (i.e., a gate valve, ball valve, or butterfly valve)
shall be required, as close as possible to the point of connection of the
water supply, to minimize water loss in case of an emergency (i.e., a main
line break) or routine repair.
f. Backflow prevention devices shall be required to protect the water supply
from contamination by the irrigation system. Project applicants and/or
developers shall refer to the applicable City code (i.e., public health) for
additional backflow prevention requirements.
g. Flow sensors that detect high flow conditions created by system damage
or malfunction are required for all on non - residential landscapes and
residential landscapes of 5000 sq. ft. or larger.
h. Master shut -off valves are required on all projects except landscapes that
make use of technologies that allow for the individual control of sprinklers
that are individually pressurized in a system equipped with low pressure
shut down features.
i. The irrigation system shall be designed to prevent runoff, low head
drainage, overspray, or other similar conditions where irrigation water
flows onto non - targeted areas (i.e., adjacent property, non - irrigated areas,
hardscapes, roadways, or structures).
j. Relevant information from the soil management plan (i.e., soil type and
infiltration rate), shall be used when designing irrigation systems.
k. The design of the irrigation system shall conform to the hydrozones of the
landscape design plan.
I. The irrigation system shall be designed and installed to meet, at a
minimum, the irrigation efficiency criteria as described in Section
30.38.100 (Water Efficient Landscape Worksheet) regarding the
Maximum Applied Water Allowance.
M. All irrigation emission devices shall meet the requirements specified in the
American National Standards Institute (ANSI) standard, American Society
of Agricultural and Biological Engineers' /International Code Council's
(ASABE /ICC) 802 -2014 Landscape Irrigation Sprinkler and Emitter
Standard. All sprinkler heads installed in the landscape shall document a
distribution uniformity low quarter of 0.65 or higher using the protocol
defined in ASABE/ICC 802 -2014.
n. The project applicants and /or developers shall inquire with the local water
purveyor about peak water operating demands (on the water supply
system) or water restrictions that may impact the effectiveness of the
irrigation system.
o. In mulched planting areas, the use of low volume irrigation is required to
maximize water infiltration into the root zone.
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P_ Sprinkler heads and other emission devices shall have matched
precipitation rates, unless otherwise directed by the manufacturer's
recommendations.
q. Head to head coverage is recommended. However, sprinkler spacing shall
be designed to achieve the highest possible distribution uniformity using
the manufacturer's recommendations.
r. Swing joints or other riser- protection components are required on all risers
subject to damage that are adjacent to hardscapes or in high traffic areas of
turf -grass.
S. Check valves or anti -drain valves are required on all sprinkler heads where
low point drainage could occur.
t. Landscape areas less than 10 feet in width in any direction shall be
irrigated with subsurface irrigation or other means that produces no runoff
or overspray.
U. Overhead irrigation shall not be permitted within 24 inches of any non-
permeable surface. Allowable irrigation within the setback from non-
permeable surfaces may include drip, drip line, or other low flow non-
spray technology. The setback area may be planted or unplanted. The
surfacing of the setback may be mulch, gravel, or other porous material.
These restrictions may be modified by the Director if.
(1) The landscape area is adjacent to permeable surfacing and no
runoff occurs; or
(2) The adjacent non - permeable surfaces are designed and constructed
to drain entirely to landscaping; or
(3) The irrigation designer specifies an alternative design or
technology, as part of the Landscape Documentation Package and clearly
demonstrates strict adherence to irrigation system design. Prevention of
overspray and runoff shall be confirmed during the irrigation audit.
Slopes greater than 25 percent shall not be irrigated with an irrigation
system with an application rate exceeding 0.75 inches per hour. This
restriction may be modified by the Director if the landscape designer
specifies an alternative design or technology, as part of the Landscape
Documentation Package, and clearly demonstrates no runoff or erosion
will occur. Prevention of runoff and erosion shall be confirmed during the
irrigation audit.
Hydrozone.
Each valve shall irrigate a hydrozone with similar site, slope, sun
exposure, soil conditions, and plant materials with similar water use.
Sprinkler heads and other emission devices shall be selected based on
what is appropriate for the plant type within that hydrozone.
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C. Trees shall be placed on separate valves from shrubs, groundcovers, and
turf to facilitate the appropriate irrigation of trees. The mature size and
extent of the root zone shall be considered when designing irrigation for
the tree.
d. Individual hydrozones that mix plants of moderate and low water use, or
moderate and high water use, may be allowed if:
(1) Plant factor calculation is based on the proportions of the
respective plant water uses and their plant factor; or
(2) The plant factor of the higher water using plant is used for
calculations.
Individual hydrozones that mix high and low water use plants shall not be
permitted.
On the landscape design plan and irrigation design plan, hydrozone areas
shall be designated by number, letter, or other designation. On the
irrigation design plan, designate the areas irrigated by each valve, and
assign a number to each valve. Use this valve number in the Hydrozone
Information Table located on the Water Efficient Landscape Worksheet.
This table can also assist with the irrigation audit and programming the
controller.
30.38.140 Grading Design Plan
For the efficient use of water, grading of a project site shall be designed to minimize soil erosion,
runoff, and water waste. A comprehensive grading plan, prepared by a civil engineer, shall be
submitted as part of the Landscape Documentation Package.
A. Grading Design Plan Details Required.
The project applicants and/or developers shall submit a landscape grading plan that
indicates finished configurations and elevations of the landscape area including:
1. Height of graded slopes;
2. Drainage patterns;
3. Pad elevations;
4. Finish grade; and
5. Stormwater retention improvements, if applicable.
6. The grading design plan shall contain the following statement: "I have complied
with the requirements of this Chapter and applied them accordingly for the
efficient use of water in the grading design plan" and shall bear the signature of a
licensed professional as authorized by law.
B. Erosion and Runoff Best Management Practices. To prevent excessive erosion and
runoff, project developers /applicants shall:
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Grade so that all irrigation and normal rainfall remains within property lines and
does not drain on to non - permeable hardscapes;
2. Avoid disruption of natural drainage patterns and undisturbed soil; and
3. Avoid soil compaction in landscape areas.
30.38.150 Certificate of Completion
Upon receipt of the permit for the Landscape Documentation Package and completion of the
landscaping and irrigation system, the applicants and/or developers shall submit a Certificate of
Completion to the Director for review and shall ensure that copies of the approved Certificate of
Completion are submitted to the local water purveyor and property owner or his or her designee.
The following details shall apply to the Certificate of Completion:
A. The Certificate of Completion shall be on a standard form approved by the Director.
B. The Certificate of Completion shall be certified by either the signer of the landscape
design plan, the signer of the irrigation design plan, or the licensed landscape contractor
that the landscape project has been installed according to the approved Landscape
Documentation Package;
1. Where there are, significant changes made in the field during construction, these
"as- built" or record drawings shall be included with the certification; and
2. A diagram of the irrigation plan showing hydrozones shall be kept with the
irrigation controller for subsequent irrigation management purposes.
C. The Certificate of Completion shall include irrigation scheduling parameters used to set
the controller in compliance with Section 30.38.160 (Irrigation Scheduling), below;
D. The Certificate of Completion shall include landscape and irrigation maintenance
schedules in compliance with Section 30.38.170 (Landscape and Irrigation Maintenance
Schedule), below;
E. The Certificate of Completion shall include an irrigation audit report in compliance with
Section 30.38.180 (Irrigation Audit, Irrigation Survey, and Irrigation Water Use
Analysis), below; and
F. The Certificate of Completion shall include a soil analysis report, if not submitted with
the Landscape Documentation Package and documentation verifying implementation of
soil report recommendations in compliance with Section 30.3 8.110 (Soil Management
Report), below.
30.38.160 Irrigation Scheduling
For the efficient use of water, all irrigation schedules shall be developed, managed, and
evaluated to use the minimum amount of water required to maintain plant health. Irrigation
schedules shall meet the following standards:
A. Irrigation scheduling shall be regulated by automatic irrigation controllers.
B. Overhead irrigation shall only be scheduled between 8:00 p.m. and 10:00 a.m. unless
weather conditions prevent it. If allowable hours of irrigation differ from the local water
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purveyor, the stricter of the two shall apply. Operation of the irrigation system outside the
normal watering window is allowed for auditing and system maintenance only.
C. For implementation of the irrigation schedule, attention shall be paid to irrigation run
times, emission device, flow rate, and current reference evapotranspiration, so that
applied water meets the Estimated Total Water Use. Total annual applied water shall be
less than or equal to Maximum Applied Water Allowance (MAWA). Actual irrigation
schedules shall be regulated by automatic irrigation controllers using current reference
evapotranspiration data (e.g., CIMIS) or soil moisture sensor data.
D. Parameters used to set the automatic controller shall be developed and submitted for each
of the following:
1. The plant establishment period;
2. The established landscape; and
3. Temporarily irrigated areas.
E. Each irrigation schedule shall consider for each station all of the following that apply:
1. Irrigation interval (days between irrigation);
2. Irrigation run times (hours or minutes per irrigation event to avoid runoff);
3. Number of cycle starts required for each irrigation event to avoid runoff;
4. Amount of applied water scheduled to be applied on a monthly basis;
5. Application rate setting;
6. Root depth setting;
7. Plant type setting;
8. Soil type;
9. Slope factor setting;
10. Shade factor setting; and
11. Irrigation uniformity or efficiency setting.
30.38.170 Landscape and Irrigation Maintenance Schedule
A. Landscapes shall be maintained to ensure water use efficiency. A regular maintenance
schedule shall be submitted with the Certificate of Completion.
B. A regular maintenance schedule shall include, but not be limited to, routine inspection;
auditing, adjustment and repair of the irrigation system and its components; aerating and
dethatching turf areas; topdressing with compost, replenishing mulch; fertilizing;
pruning; weeding in all landscape areas, and removing obstructions to emission devices.
Operation of the irrigation system outside the normal watering window is allowed for
auditing and system maintenance only.
C. Repair of all irrigation equipment shall be done with the originally installed components
or their equivalents or with components with greater efficiency.
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D. Project applicants and/or developers are encouraged to implement established landscape
industry sustainable Best Practices for all landscape maintenance activities.
30.38.180 Irrigation Audit, Irrigation Survey, and Irrigation Water Use Analysis
A. All landscape irrigation audits shall be conducted by a certified landscape irrigation
auditor. Landscape audits shall not be conducted by the person who designed the
landscape or installed the landscape.
B. In large projects or projects with multiple landscape installations (i.e. production home
developments) an auditing rate of one in seven parcels or approximately 15 percent will
satisfy this requirement.
C. For new construction and rehabilitated landscape projects installed after December 1,
2015, the following shall apply:
The project applicants and/or developers shall submit an irrigation audit report
with the Certificate of Completion, including inspection, system tune -up, system
test with distribution uniformity, reporting overspray or run off that causes
overland flow, and preparation of an irrigation schedule, including configuring
irrigation controllers with application rate, soil types, plant factors, slope,
exposure and any other factors necessary for accurate programming;
2. The City may require an irrigation water use analysis, irrigation audits, and
irrigation surveys to ensure compliance with the Maximum Applied Water
Allowance.
30.38.190 Irrigation Efficiency
For the purpose of determining Estimated Total Water Use, average irrigation efficiency is
assumed to be 0.75 for overhead spray devices and 0.81 for drip system devices.
30.38.200 Recycled Water
A. The installation of water irrigation systems shall allow for the current and future use of
recycled water.
B. All recycled water irrigation systems shall be designed and operated in compliance with
all applicable local and State laws.
C. Landscapes using recycled water are considered Special Landscape Areas. The ETAF for
new and existing (non - rehabilitated) Special Landscape Areas shall not exceed 1.0.
30.38.210 Graywater Systems
Graywater systems promote the efficient use of water and are encouraged to assist in on -site
landscape irrigation. All graywater systems shall conform to the California Plumbing Code
(Title 24, Part 5, Chapter 16) and any applicable local standards.
30.38.220 Stormwater Management and Rainwater Retention
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A. Stormwater management practices minimize runoff and increase infiltration which
recharges groundwater and improves water quality. Implementing stormwater best
management practices in the landscape and grading design plans to minimize runoff and
to increase on -site rainwater retention and infiltration is required.
B. Project applicants and/or developers shall refer to the following references for
information on Low Impact Development (LID) standards, including stormwater
management, operations and maintenance:
1. Chapter 27D (Post Construction Stormwater Pollution and Prevention of the
Municipal Code, and
2. South Santa Clara County Regional Stormwater Management Guidance Manual for
Low Impact Development and Post - Construction Requirements Project applicants and/or
developers shall refer to the City or Regional Water Quality Control Board for
information on any applicable stormwater technical requirements.
C. All planted landscape areas shall have friable soil to maximize water retention and
infiltration in compliance with Section 30.38.120 (Landscape Design Plan), above.
D. Landscape areas shall be designed for capture and infiltration capacity that is sufficient to
prevent runoff from impervious surfaces (i.e. roof and paved areas) from either: (1) 24-
hour rain event or (2) the 85th percentile, 24 -hour rain event, and/or additional capacity
as required by any applicable local, regional, State and/or Federal regulations.
E. Stormwater projects shall incorporate any of the following elements to improve on -site
storm water and dry weather runoff capture and use:
1. Grade impervious surfaces (i.e., driveways), during construction to drain to
vegetated areas.
2. Minimize the area of impervious surfaces (i.e., paved areas, roof, and concrete
driveways).
3. Incorporate pervious or porous surfaces (e.g., gravel, permeable pavers or blocks,
pervious or porous concrete) that minimize runoff.
4. Direct runoff from paved surfaces and roof areas into planting beds or landscaped
areas to maximize site water capture and reuse.
5. Incorporate rain gardens, cisterns, and other rain harvesting or catchment systems.
6. Incorporate infiltration beds, swales, basins, and drywells to capture storm water
and dry weather runoff and increase percolation into the soil.
7. Consider constructed wetlands and ponds that retain water, equalize excess flow,
and filter pollutants.
30.38.230 Public Education
A. Publications. The City shall provide information to owners of permitted renovations and
new, single - family residential homes regarding the design, installation, management, and
maintenance of water efficient landscapes based on a water budget.
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B. Model Homes. All model homes that are landscaped shall use signs and written
information to demonstrate the principles of water efficient landscapes described in this
Chapter
Signs shall identify the following:
a. The model as an example of a water efficient landscape featuring elements
like hydrozones, irrigation equipment, and others that contribute to the
overall water efficient theme; and
b. Information about the site's water use as designed in compliance with the
local ordinances; specify who designed and installed the water efficient
landscape; and demonstrate low water use approaches to landscaping like
using native plants, graywater systems, and rainwater catchment systems.
2. Developers /applicants shall provide information about designing, installing,
managing, and maintaining water efficient landscapes to home buyers.
30.38.240 Provisions for Existing Landscapes
A. This Section shall apply to all existing landscape areas that were installed before
December 1, 2015 and are over one acre in size.
For all landscape areas that have a water meter, the City shall administer
programs that may include, but not be limited to, irrigation water use analyses,
irrigation surveys, and irrigation audits to evaluate water use and provide
recommendations as necessary to reduce landscape water use to a level that does
not exceed the Maximum Applied Water Allowance for existing landscapes. The
Maximum Applied Water Allowance for existing landscapes shall be calculated
as: MAWA = (0.8) (ETo) (LA) (0.62).
2. For all landscape areas that do not have a water meter, the City shall administer
programs that may include, but not be limited to, irrigation surveys and irrigation
audits to evaluate water use and provide recommendations as necessary in order
to prevent water waste.
B. All landscape irrigation audits shall be conducted by a certified landscape irrigation
auditor.
30.38.250 Water Waste Prevention
A. Project applicants and /or developers shall prevent water waste resulting from inefficient
landscape irrigation by prohibiting runoff from leaving the target landscape areas due to
low head drainage, overspray, or other similar conditions where water flows onto
adjacent property, non - irrigated areas, walks, roadways, parking lots, or structures.
Penalties for violating these prohibitions shall be enforced in compliance with Article 53
of Chapter 30 (Enforcement of the Zoning Ordinance).
B. Restrictions regarding overspray and runoff may be modified if:
1. The landscape area is adjacent to permeable surfacing and no runoff occurs; or
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2. The adjacent non - permeable surfaces are designed and constructed to drain
entirely to landscaping.
30.38.260 Penalties
Noncompliance with the applicable provision of this Chapter shall be subject to enforcement
action, as provided in Article 53 of Chapter 30 (Enforcement of the Zoning Ordinance).
SECTION II
If any section, subsection, subdivision, sentence, clause or phrase of this Ordinance is for any
reason held to be unconstitutional or otherwise void or invalid by any court of competent
jurisdiction, such decision shall not affect the validity of the remaining portions of this
Ordinance. The City Council hereby declares that it would have passed this Ordinance and each
section, subsection, subdivision, sentence, clause, or phrase thereof, irrespective of the fact that
any one or more sections, subsections, subdivisions, sentences, clauses, or phrases be declared
unconstitutional.
SECTION III
Pursuant to section 608 of the Charter of the City of Gilroy, this ordinance shall be in full force
and effect thirty (30) days from and after the date it is adopted.
PASSED AND ADOPTED this 19th day of March, 2018, by the following roll call vote:
AYES: COUNCILMEMBERS: HARNEY, LEROE- MUNOZ, TOVAR,
TUCKER and VELASCO
NOES: COUNCILMEMBERS: NONE
ABSENT: COUNCILMEMBERS: BLANKLEY, BRACCO
NAVY
ORDINANCE NO. 2018-06
I, SHAWNA FREELS, City Clerk of the City of Gilroy, do hereby certify that the
attached Ordinance No. 2018 -06 is an original ordinance, or true and correct copy of a City
ordinance, duly adopted by the Council of the City of Gilroy at a regular meeting of said Council
held on the 19th day of March, 2018, at which meeting a quorum was present.
IN WITNESS WHEREOF, I have hereunto set my hand and affixed the Official Seal of
the City of Gilroy this 21St day of March, 2018.
City Clerk of the City of Gilroy
(Seal)