HomeMy WebLinkAboutOrd 18-92 Water Effic Landscape ORDINANCE NO. 18-92
AN ORDINANCE OF THE CITy OF DUBLIN
ADDING CHAPTER 8.20
PERTAINING TO WATER EFFICIENT LANDSCAPING
TO THE MUNICIPAL CODE AND
DECLARING THE ORDINANCE AN URGENCY ORDINANCE
The City Council of the City of Dublin does ordain as follows:
SECTION 1: Chapter 8.20 shall be added to the City of Dublin Municipal Code and
read as follows:
"Section 8.20.010: PURPOSE
The purpose of this ordinance is to:
(a) Reduce irrigation water consumption with no decline in the physical and
visual quality of urban landscaping;
(b) Establish a sufficient but flexible structure for designing, installing,
and maintaining water efficient landscapes in local projects.
Section 8.20.020: APPLIGABILITY
The requirements of this ordinance shall apply to all Building or Development
permits issued after December 31, 1992, for:
(a)
(b)
All new and rehabilitated landscaping for public agency projects and
private development projects that require a Development and/or Building
permit with new or rehabilitated landscapes that meet the criteria of
Section 8.20.020, including but not limited to industrial, commercial,
and recreational projects; and
Developer-installed landscaping in single-family and multi-family
projects; and
The requirements of this ordinance do not apply to:
(a)
(b)
(c)
Homeowner-provided landscaping at existing and new single-family and
multi-family projects;
Cemeteries;
Registered historical sites;
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(d)
Ecological restoration projects that do not require a permanent
irrigation system;
(e)
Landscaping irrigated solely by reclaimed water and to which no potable
pipeline exists for irrigation purposes; or
(f) Any project with a landscaped area less than 5,000 square feet.
Section 8.20.030: DEFINITIONS
The words used in this ordinance have the meaning set forth as follows:
(a)
"anti-drain valve" or "check valve" means a valve located under a
sprinkler head to hold water in the system so it minimizes drainage from
the lower elevation sprinkler heads.
(b)
"application rate" means the depth of water applied to a given area,
usually measured in inches per hour.
(c)
"applied water" means the portion of water supplied by the irrigation
system to the landscape.
(d)
"automatic controller" means a mechanical or solid state timer, capable
of operating valve stations to set the days and length of time of a
water application.
(e)
"backflow prevention device" means a safety device used to prevent
pollution or contamination of the water supply due to the reverse flow
of water from the irrigation system.
(f)
"certified landscape irrigation auditor" means an individual certified
by the Irrigation Association (a nationwide organization). The State of
California provides training that is certified by the Irrigation
Association.
(g) "City" means the City of Dublin.
(h)
"conversion factor (0.62)" means a number that converts the maximum
applied water allowance from acre-inches per acre per year to gallons
per square foot per year. The conversion factor is calculated as
follows:
(325,851 gallons/ 43,560 square feet)/12 inches = (0.62)
325,851 gallons = one acre foot
43,560 square feet = one acre
12 inches = one foot
To convert gallons per year to 100-cubic-feet per year, another common
billing unit for water, divide gallons per year by 748.
(748 gallons = 100 cubic feet.)
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(i>
(j)
(k)
<l)
(m)
(n)
(o)
(P)
(q)
(r)
(s)
<t)
"Development Permit" means approval for any type of development or
development project as defined in Government Code Section 65927 and
65928.
"District" means the Dublin San Ramon Services District.
"ecological restoration project" means a project where the site is
intentionally altered to establish a defined, indigenous, historic
ecosystem.
"emitter" means drip irrigation fittings that deliver water slowly from
the system to the soil.
"established landscape" means the point at which plants in the landscape
have developed roots into the soil adjacent to the root ball.
"establishment period" means the first year after installing the plant
in the landscape.
"Estimated Applied Water Use" means the portion of the Estimated Total
Water Use that is derived from applied water. The Estimated Applied
Water Use shall not exceed the Maximum Applied Water Allowance. The
Estimated Applied Water Use may be the sum of the water recommended
through the irrigation schedule, as referenced in Section 8.20.040 (II)
(c).
"Estimated Total Water Use" means the annual total amount of water
estimated to be needed to keep the plants in the landscaped area
healthy. It is based upon such factors as the local evapotranspiration
rate, the size of the landscaped area, the types of plants, and the
efficiency of the irrigation system as described in Section 8.20.040
(II) (d).
"ET adjustment factor" means a factor of 0.8, 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.
A combined plant mix with a site-wide average of 0.5 is the basis of the
plant factor portion of this calculation. The irrigation efficiency for
purposes of the ET Adjustment Factor is 0.625.
Therefore, the ET Adjustment Factor (0.8) = (0.5/0.625).
"evapotranspiration" means the quantity of water evaporated from
adjacent soil surfaces and transpired by plants during a specific time.
"flow rate" means the rate at which water flows through pipes and valves
(gallons per minute or cubic feet per second).
"hydrozone" means a portion of the landsCaped area having plants with
similar water needs that are served by a valve or set of valves with the
same schedule. A hydrozone may be irrigated or non-irrigated. For
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(u)
(v)
example, a naturalized area planted with native vegetation that will not
need supplemental irrigation once established is a non-irrigated
hydrozone.
"infiltration rate" means the rate of water entry into the soil
expressed as a depth of water per unit of time (inches per hour).
"irrigation efficiency" means the 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 minimum irrigation
efficiency for purposes of this ordinance is 0.625. Greater irrigation
efficiency can be expected from well designed and maintained systems.
(w)
"landscape irrigation audit" means a process to perform site
inspections, evaluate irrigation systems, and develop efficient
irrigation schedules.
(x)
"landscaped area" means the entire parcel less the building footprint,
driveways, non-irrigated portions of parking lots, hardscapes - such as
decks and patios, and other non-porous areas. Water features are
included in the calculation of the landscaped area. Areas dedicated to
edible plants, such as orchards or vegetable gardens are not included.
(Y)
"lateral line" means the water delivery pipeline that supplies water to
the emitters or sprinklers from the valve.
(z)
"main line" means the pressurized pipeline that delivers water from the
water source to the valve or outlet.
(aa) "Maximum Applied Water Allowance" means, for design purposes, the upper
limit of annual applied water for the established landscaped area as
specified in Section 8.20.040 (II) (b). It is based upon the area's
reference evapotranspiration, the ET Adjustment Factor, and the size of
the landscaped area. The Estimated Applied Water Use shall not exceed
the Maximum Applied Water Allowance.
(bb) "mulch" means any material such as leaves, bark, straw or other
materials left loose and applied to the soil surface for the beneficial
purpose of reducing evaporation.
(cc) "operating pressure" means the pressure at which a system of sprinklers
is designed to operate, usually indicated at the base of a sprinkler.
(dd) "overhead sprinkler irrigation systems" means those with high flow rates
(pop-ups, impulse sprinklers, rotors, etc.)
(ee) "overspray" means the water which is delivered beyond the landscaped
area, wetting pavements, walks, structures, or other non-landscaped
areas.
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(ff) "permit" means a Building or Development permit for a project which, as
part of its scope, involves the installation of new landscaping or
rehabilitating an existing landscape.
(gg) "plant factor" means a factor that, when multiplied by reference
evapotranspiration, estimates the amount of water used by plants. For
purposes of this ordinance, the average plant factor of low water using
plants ranges from 0 to 0.3, for average water using plants the range is
0.4 to 0.6, and for high water using plants the range is 0.7 to 1.0.
(hh) "rain sensing device" means a system which automatically shuts off the
irrigation system when it rains.
(ii) "record drawing" or "as-builts" means a 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.
(jj) "recreational area" means areas of active play or recreation such as
sports fields, school yards, picnic grounds, or other areas with intense
foot traffic.
(kk) "recycled water," "reclaimed water," or "treated sewage effluent water"
means treated or recycled waste water of a quality suitable for
nonpotable uses such as landscape irrigation; not intended for human
consumption.
(11) "reference evapotranspiration" or "ETo" means a standard measurement of
environmental parameters which affect the water use of plants. ETo is
given in inches per day, month, or year as represented in Section
8.20.060, 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.
(mm) "rehabilitated landscape" means any relandscaping project that requires
a permit.
(nn) "runoff" means water which is not absorbed by the soil or landscape to
which it is applied and flows from the area. For example, runoff may
result from water that is applied at too great a rate (application rate
exceeds infiltration rate) or when there is a severe slope.
(oo) "soil moisture sensing device" means a device that measures the amount
of water in the soil.
(pp) "soil texture" means the classification of soil based on the percentage
of sand, silt, and clay in the soil.
(qq) "sprinkler head" means a device which sprays water through a nozzle.
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(rr) "static water pressure" means the pipeline or municipal water supply
pressure when water is not flowing.
(ss) "station" means an area served by one valve or by a set of valves that
operate simultaneously.
(tt) "turf" means a surface layer of earth containing mowed grass with its
roots. Annual bluegrass, Kentucky bluegrass, Perennial ryegrass, Red
rescue, and Tall fescue are cool-season grasses. Bermudagrass, Kikuyu-
grass, Seashore paspalum, St. Augustinegrass, Zoysiagrass, and Buffalo
grass are warm-season grasses.
(uu) "valve" means a device used to control the flow of water in the
irrigation system.
(w) "water conservation concept statement" means a one-page checklist and a
narrative summary of the project as shown in Section 8.20.040 (II).
Section 8.20.040: PROVISIONS FOR NEW OR REHABILITATED LANDSCAPES
I. LANDSGAPE DOCUMENTATION PACKAGE
(a)
A copy of the landscape documentation package conforming to this chapter
shall be submitted to the City. No Development or Building permit shall
be issued until the City reviews and approves the landscape
documentation package.
(b)
(c)
A copy of the approved landscape documentation package shall be provided
to the property owner or site manager along with the record drawings and
any other information normally forwarded to the property owner or site
manager.
A copy of the Water Conservation Concept'Statement and the Certificate
of Substantial Completion shall be sent by the project manager to the
City and to the local retail water purveyor, the Dublin San Ramon
Services District, prior to the final sign-off of the permit by the
City.
(d)
Each landscape documentation package shall include the following
elements, which are described in Section 8.20.040 (II):
(1)
(2)
(3)
(4)
(5)
(6)
(?)
(8)
(9)
Water Conservation Concept Statement
Calculation of the Maximum Applied Water Allowance
Calculation of the Estimated Applied Water Use
Calculation of the Estimated Total Water Use
Landscape Design Plan
Irrigation Design Plan
Irrigation Schedules
Maintenance Schedule
Landscape Irrigation Audit Schedule
(10) Grading Design Plan
(11) Soil Analysis (if applicable)
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II.
(12) Certificate of Substantial Completion. (To be submitted after
installation of the project).
ELEMENTS OF LANDSCAPE DOCUMENTATION PACKAGE
A. Water Conservation Concept Statement
Each landscape documentation package shall include a cover sheet,
referred to as the Water Conservation Concept Statement. The City will
provide a sample statement. It shall serve as a checklist to verify
that the elements of the landscape documentation package have been
completed and have a narrative summary of the project.
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The Maximum Applied Water Allowance
(1)
A project's Maximum Applied Water Allowance shall be calculated
using the following formula:
MAWA = (ETo) (0.8) (LA) (0.62) where:
MAWA = Maximum Applied Water Allowance (gallons per year)
ETo = Reference Evapotranspiration (inches per year)
0.8 = ET Adjustment Factor
LA = Landscaped Area (square feet)
0.62 = conversion factor (to gallons per square foot)
(2)
Portions of landscaped areas in public and private projects such
as parks, playgrounds, sports fields, golf courses, or school
yards where turf provides a playing surface or serves other
recreational purposes are considered recreational areas and may
require water in addition to the Maximum Applied Water Allowance.
A statement shall be included with the landscape design plan,
designating recreational areas to be used for such purposes and
specifying any needed amount of additional water above the Maximum
Applied Water Allowance.
Estimated Applied Water Use
(1)
The Estimated Applied Water Use shall not exceed the Maximum
Applied Water Allowance.
(2)
A calculation of the Estimated Applied Water Use shall be
submitted with the Landscape Documentation Package. It may be
calculated by summing the amount of water recommended in the
irrigation schedule.
Estimated Total Water Use
(1)
A calculation of the Estimated Total Water Use shall be submitted
with the Landscape Documentation Package. The Estimated Total
Water Use may be calculated by summing the amount of water
_
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recommended in the irrigation schedule or calculate from the
following formula'
The Estimated Total Water Use for the entire landscaped area
equals the sum of the Estimated Water Use of all hydrozones in
that landscaped area.
EWU (hydrozone)
= (ETo) (PF) (HA) (.62)
(IE)
EWU (hydrozone)
ETo
PF
HA
(.623
IE
= Estimated Water Use (gallons per year)
= Reference Evapotranspiration (inches per year)
= plant factor
= hydrozone area (square feet)
= conversion factor
= irrigation efficiency
Landscape Design Plan
A landscape design plan meeting the following requirements shall be
submitted as part of the landscape documentation package.
(1) Plant Selection and Grouping
(a)
Any plants may be used in the landscape, providing the
Estimated Applied Water Use recommended does not exceed the
Maximum Applied Water Allowance and that the plants meet the
specifications set forth in (b), (c), (d), and (e).
(b)
This Ordinance adopts by reference the plants listed in
Water Conserving Plants and Landscapes for the Bay Area
published by the East Bay Municipal Utility District, and
for determining water usage, the plants listed in the WUCOLS
PROJECT (Water Use Classification of Landscape Species)
developed by the University of California Cooperative
Extension.
(c)
Plants having similar water use shall be grouped together in
distinct hydrozones.
(d)
Plants shall be selected appropriately based upon their
adaptability to the climatic, geologic, and topographical
conditions of the site. Protection and preservation of
native species and natural areas is encouraged. The
planting of trees is encouraged wherever it is consistent
with the other provisions of this ordinance.
(e)
Fire prevention needs shall be addressed in areas that are
fire prone. Information about fire prone areas and
appropriate landscaping for fire safety is available from
the Dougherty Regional Fire Authority or the California
Department of Forestry.
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(2)
Water Features
(a) Recirculating water shall be used for decorative water
features.
(b) Pool and spa covers are encouraged.
(3)
Landscape Design Plan Specifications
The landscape design plan shall be drawn on project base sheets at
a scale that accurately and clearly identifies:
(a) Designation of hydrozones.
(b)
Landscape materials, trees, shrubs, groundcover, turf, and
other vegetation. Planting symbols shall be clearly drawn
and plants labeled by botanical name, common name, container
size, spacing, and quantities of each group of plants
indicated.
(c) Property lines and street names.
(d) Streets, driveways, walkways, and other paved areas.
(e) Pools, ponds, water features, fences, and retaining walls.
<f)
Existing and proposed buildings and structures including
elevation view if applicable.
(g)
Natural features including but not limited to rock
outcroppings, existing trees, shrubs that will remain.
(h)
Tree staking, plant installation, soil preparation details,
and any other applicable planting and installation details.
(i)
A calculation of the total landscaped area in relation to
the project site and a calcUlation of total turf area in
relation to the landscaped area.
(j) Designation of recreational areas.
Irrigation Design Plan
An irrigation design plan meeting the following conditions shall be
submitted as part of the Landscape Documentation Package.
(1) Irrigation Design Criteria
(a)
Runoff and Overspray. Soil types and infiltration rate
shall be considered when designing irrigation systems. Ail
irrigation systems shall be designed to avoid runoff, low
head drainage, overspray, or other similar conditions where
water flows onto adjacent property, non-irrigated areas,
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(2)
walks, roadways, or structures. Proper irrigation equipment
and schedules, including features such as repeat cycles,
shall be used to closely match application rates to
infiltration rates therefore minimizing runoff.
Special attention shall be given to avoid runoff on slopes
and to avoid overspray in planting areas with a width less
than ten feet, and in median strips.
No overhead sprinkler irrigation systems shall be installed
in median strips less than ten feet wide.
(b)
Irrigation Efficiency. For the purpose of determining the
maximum applied water allowance, irrigation efficiency is
assumed to be 0.625. Irrigation systems shall be designed,
maintained, and managed to meet or exceed 0.625 efficiency.
(c) Equipment.
Water Meters: Separate landscape water meters shall be
installed for all projects except for single family homes.
Controllers: Automatic control systems shall be required
for all irrigation systems and must be able to accommodate
all aspects of the design.
Valves: Plants which require different amounts of water
shall be irrigated by separate valves. If one valve is used
for a given area, only plants with similar water use shall
be used in that area. Anti-drain (check) valves shall be
installed in strategic points to minimize or prevent low-
head drainage.
Sprinkler Heads: Heads and emitters shall have consistent
application rates within each control valve circuit.
Sprinkler heads shall be selected for proper area coverage,
application rate, operating pressure, adjustment capability
and ease of maintenance.
Rain Sensing Override Devices: Rain sensing override
devices are recommended for all irrigation systems.
Soil Moisture Sensing Devices: It is recommended that soil
moisture sensing devices be considered where appropriate.
Recycled Water
(a)
The installation of recycled water irrigation systems (dual
distribution systems) shall be required to allow for the
current and future use of recycled water, unless a written
exemption has been granted as described in the following
section (2)(b).
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(3)
(b)
Irrigation systems shall make use of recycled water unless a
written exemption has been granted by the District, stating
that recycled water meeting all health standards is not
available and will not be available in the foreseeable
future for this particular site.
(c)
The recycled water irrigation systems shall be designed and
operated in accordance with all local and state codes.
Irrigation Design~Plan Specifications
Irrigation systems shall be designed to be consistent with
hydrozones.
The irrigation design plan shall be drawn on project base sheets.
It shall be separate from, but use the same format as, the
landscape design plan. The scale shall be the same as that used
for the landscape design plan described in Section 8.20.040 (II)
(e).
The irrigation design plan shall accurately and clearly identify:
(a)
Location and size of separate water meters for the
landscape, if applicable.
(b)
Location, type, and size of all components of the irrigation
system, including automatic controllers, main and lateral
lines, valves, sprinkler heads, moisture sensing devices,
rain switches, quick couplers, and backflow prevention
devices.
(c)
Static water pressure at the point of connection to the
public water supply.
(d)
Flow rate (gallons per minute), application rate (inches per
hour), and design operating pressure (psi) for each station.
(e)
Recycled water irrigation systems as specified in the
Section 8.20.040 (II) (f) (2).
Irrigation Schedules
Irrigation schedules satisfying the following conditions shall be
submitted as part of the Landscape Documentation Package.
(1)
An annual irrigation program with monthly irrigation schedules
shall be required for the plant establishment period, for the
established landscape, and for any temporarily irrigated areas.
(2) The irrigation schedule shall:
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(a)
include run time (in minutes per cycle), suggested number of
cycles per day, and frequency of irrigation for each
station; and
(b)
provide the amount of applied water (in hundred cubic feet,
gallons, or in whatever billing units the District uses)
recommended on a monthly and annual basis.
(3)
The total amount of water for the project shall include water
designated in the Estimated Total Water Use calculation plus water
needed for any water features, which shall be considered as a high
water using hydrozone.
(4)
Recreational areas designated in the landscape design plan shall
be highlighted and the irrigation schedule shall indicate if any
additional water is needed above the Maximum Applied Water
Allowance because of high plant factors (but not due to irrigation
inefficiency.)
Whenever possible, irrigation scheduling shall incorporate the use
of evapotranspiration data such as those from the California
Irrigation Management Information System (CIMIS) weather stations
to apply the appropriate levels of water for different climates.
(6)
Whenever possible, landscape irrigation shall be scheduled between
9:00 p.m. and 7:00 a.m. to avoid irrigating during times of high
wind or high temperature.
Maintenance Schedules
A regular maintenance schedule satisfying the following conditions shall
be submitted as part of the Landscape Documentation Package:
(i)
Landscapes shall be maintained to ensure water efficiency. A
regular maintenance schedule shall include but not be limited to
checking, adjusting, and repairing irrigation equipment; resetting
the automatic controller; aerating and dethatching turf areas;
replenishing mulch; fertilizing; pruning, and weeding in all
landscaped areas.
(2)
Whenever possible, repair of irrigation equipment shall be done
with the originally specified materials or their equivalents.
Landscape Irrigation Audit Schedules
A schedule of landscape irrigation audits, for all but single family
residences, satisfying the following conditions shall be sUbmitted to
the City as part of the Landscape Documentation Package.
(1)
At a minimum, audits shall be in accordance with the State of
California Landscape Water Management Program as described in the
Landscape Irrigation Auditor Handbook, the entire document, which
is hereby incorporated by reference. (See Landscape Irrigation
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Auditor Handbook (June 1990) version 5.5 [formerly Master Auditor
Training]), or as may be updated.
(2)
The schedule shall provide for landscape irrigation audits to be
conducted by State-certified landscape irrigation auditors at
least once every five years and submitted to the local water
purveyor, the Dublin San Ramon Services District.
Grading Design Plan
Grading design plans satisfying the following conditions shall be
submitted as part of the Landscape Documentation Package.
(1)
A grading design plan shall be drawn on project base sheets. It
shall be separate from but use the same format as the landscape
design plan.
(2)
The grading design plan shall indicate finished configurations and
elevations of the landscaped area, including the height of graded
slopes, drainage patterns, pad elevations, and finish grade.
Soils
(1)
A soil analysis for projects with landscaping over 20,000 square
feet (SF) satisfying conditions (a),(b), and (c) shall be prepared
by a licensed soils lab or analyst and shall be submitted as part
of the Landscape Documentation Package.
(a)
Determination of soil texture, indicating the percentage of
organic matter.
(b)
An approximate soil infiltration rate (either measured or
derived from soil texture/infiltration rate tables). A
range of infiltration rates shall be noted where
appropriate.
(c) Measure of pH, and total soluble salts.
(2)
For projects with landscaping under 20,000 SF (unless a soils
analysis has been undertaken), soil shall be amended using six (6)
cubic yards (CY) of nitrified soil conditioner per 1,000 SF
incorporated into the top six (6) inches of soil.
(3)
A mulch of at least three inches shall be applied to all planting
areas except turf.
Certification
(i)
Upon completing the installation of the landscaping and the
irrigation system, an irrigation audit shall be conducted by a
certified landscape irrigation auditor prior to the final field
observation. (See Landscape Irrigation Auditor Handbook as
referenced in Section 8.20.040 (II) (i).)
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(2)
A licensed landscape architect or contractor, certified irrigation
designer, or other licensed or certified professional in a related
field shall conduct a final field observation and, prior to
occupancy of the building or establishment of use of property,
shall provide a certificate of substantial completion to the City.
The certificate shall specifically indicate that plants were
installed as specified, that the irrigation system was installed
as designed, and that an irrigation audit has been performed,
along with a list of any observed deficiencies.
Certification shall be accomplished by completing a Certificate of
Substantial Completion and delivering it to the City, to the
retail water supplier, and to the Owner of Record. The City will
provide a sample certificate form.
III. PUBLIC EDUCATION
A. Publications.
Information about the efficient use of landscape water is available to
water users throughout the community from the District.
B. Model Homes.
At least one model home that is landscaped in each project consisting of
eight or more homes shall demonstrate via signs and information the
principles of water efficient landscapes described in this ordinance.
lo
Signs shall be used to identify the model as an example of a water
efficient landscape and featuring elements such as hydrozones,
irrigation equipment and others which contribute to the overall
water efficient theme.
°
Information shall be provided by the project developer about
designing, installing, and maintaining water efficient landscapes.
Section 8.20.050: PROVISIONS FOR EXISTING LANDSGAPES
I. WATER MANAGEMENT
Ail existing landscaped areas in the City that are one acre or more, including
golf courses, green belts, common areas, multi-family housing, businesses,
parks, cemeteries, and publicly owned landscapes shall perform a landscape
irrigation audit at the property owner's request at least every five years.
At a minimum, the audit shall be in accordance with the California Landscape
Water Management Program as described in the Landscape Irrigation Auditor
Handbook, the entire document which is hereby incorporated by reference. (See
Landscape Irrigation Auditor Handbook, Dept. of Water Resources, Water
Conservation Office (June 1990) version 5.5, or as may be updated.) Results
shall be presented to the District for review.
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Recognition of projects that stay within the Maximum Applied Water Allowance
is encouraged.
II. WATER WASTE PREVENTION
Water Waste Prevention shall fall under the authority of the District.
Section 8.20.060: REFERENGE EVAPOTRANSPIRATION in inches (Historical Data,
extrapolated from 12-Month Normal Year ETo Maps and U.C. publication 21426):
Ann.
County City Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. ETo
Alameda Livermore 1.2 1.5 2.9 4.4 5.9 6.6 7.4 6.4 5.3 3.2 1.5 0.9 47.2
Oakland 1.5 1.5 2.8 3.9 5.1 5.3 6.0 5.5 4.8 3.1 1.4 0.9 41.8"
SECTION 2: Urgency Ordinance: This provisions of this ordinance shall take effect
on January 1, 1993, pursuant to Government Code Section 36937 as an urgency
ordinance. The urgency is based on the fact that such an ordinance is required by
the State of California prior to January 1, 1993.
SECTION 3: Posting of Ordinance: The City Clerk of the City of Dublin shall cause
this Ordinance to be posted in at least three (3) public places in the City of
Dublin in accordance with Section 36933 of the Government Code of the State of
California.
PASSED, APPROVED, AND ADOPTED this 14th day of December, 1992.
AYES: Councilmembers Burton, Houston, Howard, Moffatt
and Mayor Snyder
NOES: None
ABSENT: None
Mayo~ f
ATTEST
City ~l~rk--
a:\december\ldscpord
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