HomeMy WebLinkAboutItem 6.3 WtrEfficientLndscpOrd
CITY OF DUBLIN
AGENDA STATEMENT
City Council Meeting Date:
December 14, 1992
SUBJECT:
EXHIBITS ATTACHED:
RECOMMENDATION:
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FINANCIAL STATEMENT:
Public Hearing: Water Efficient Landscape Ordinance
Report by: Public Works Director Lee Thompson
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4)
Draft Ordinance
Sample Water Conservation Concept Statement Form
Sample Certificate of Substantial Completion
Copy of Article 10.8 "Water Conservation In
Landscaping" of the State Government Code.
State model ordinance annotated to indicate
items changed in Dublin's draft ordinance.
5)
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5)
Open public hearing
Receive Staff report and public comment
Question Staff and the public
Close public hearing and deliberate
Waive reading and adopt ordinance on an urgency
basis, based on the finding that the State
Ordinance will take effect on January 1, 1993 if
the City's Ordinance is not adopted prior to
that date.
This Ordinance will require the City to design all new
park and median projects to its standards, which will
mean additional design costs. The landscaping design
cost for developers will also increase; however, the
long term savings in reduced water usage should more
than offset the additional cost.
There will be some additional staff time required to
plan check development permits and building permits,
the cost of which mayor may not be recoverable
depending on the City's fee for the particular type of
permit. Staff will be reviewing the City's fee
resolution for needed revisions so that these costs
are recovered.
DESCRIPTION: Because of the recognition that water is a limited
resource and that growth cannot continue without water, the State Legislature passed
Assembly Bill 325, which dictated that local jurisdictions either pass their own
Water Efficient Landscape Ordinance by January 1, 1993, or be subject to a State
model ordinance. An advisory task force was formed consisting of members from the
League of California Cities, water agencies, builders, landscape architects, and
other related industries, to help establish a model ordinance which everyone could
live with. After about a year and a half of draft ordinances and revisions, the
State adopted a model ordinance on July 31, 1992.
Using the State ordinance as a basis, Staff has dr~fted an r.rdinance for the City of
Dublin's use. In doing so, Staff has modified the State ordinance so as not to
overlap or conflict with the Dublin San Ramon Services District's codes and
policies. Dublin will require the developers' initial design to comply with the
ordinance, and it will be up to DSRSD to monitor the long-term auditing, as the
CITY CLERK
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District has access to water use records and the ability to penalize through such
policies as stepped water use fees, restrictors, and/or the closing of water meters.
The ordinance will apply to projects needing Building or Development permits for
developer or public agency projects with landscaped areas greater than 5,000 square
feet. It will not apply to homeowner-installed landscaping.
The ordinance will set a maximum applied water allowance based on the type of soil
and the ability of the soil to hold the water. The plant palette will then be
designed so as not to exceed this water allowance and will, in turn, require the use
of water conserving plants. The ordinance will require plants having similar water
needs to be grouped by irrigation controller and will set guidelines for the design
of irrigation systems to eliminate or minimize runoff and overspray.
The ordinance also requires allowance for future hookup of recycled water where
practicable. Irrigation and maintenance schedules will be predesigned and delivered
to the property owner.
A landscape audit will be required after the initial landscaping and irrigation
installation and, subsequently, every five years. The five year audit will be
enforced by DSRSD.
This ordinance covers a new concept for the City, and it is anticipated that there
will be changes as these requirements are put into effect. Staff will review the
practical working aspects of the ordinance and may return to the City Council with
.updated requirements.
As this ordinance must be adopted prior to January 1, 1993, or the State's model
ordinance will automatically take effect, Staff recommends that the City Council
conduct a public hearing, deliberate, and adopt the ordinance on an urgency basis to
become effective as of January 1st.
a: (9293)\december\agsth20
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ORDINANCE NO. -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: APPLICABILITY
The requirements of this ordinance shall apply to all Building or Development
permits issued after December 31, 1992, for:
(a) 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
(b) Developer-installed landscaping in single-family and multi-family
projects; and
The requirements of this ordinance do not apply to:
(a) Homeowner-provided landscaping at existing and new single-family and
multi-family projects;
(b) Cemeteries;
(c) 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
325,851 gallons = one acre foot
43,560 square feet = one acre
12 inches = one foot
(0.62)
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) "Development Permit" means approval for any type of development or
development project as defined in Government Code Section 65927 and
65928.
(j) "District" means the Dublin San Ramon Services District.
(k) "ecological restoration project" means a project where the site is
intentionally altered to establish a defined, indigenous, historic
ecosystem.
(1) "emitter" means drip irrigation fittings that deliver water slowly from
the system to the soil.
(m) "established landscape" means the point at which plants in the landscape
have developed roots into the soil adjacent to the root ball.
(n) "establishment period" means the first year after installing the plant
in the landscape.
(0) "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) .
(p) "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).
(q) "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).
(r) "evapotranspiration" means the quantity of water evaporated from
adjacent soil surfaces and transpired by plants during a specific time.
(s) "flow rate" means the rate at which water flows through pipes and valves
(gallons per minute or cubic feet per second).
(t) "hydrozone" means a portion of the landscaped area having plants with
similar water needs that are served by a valve or set of valves T,,;'ith tl'.2
same schedule. A hydrozone may be irrigated or non-irrigated. For
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example, a naturalized area planted with native vegetation that will not
need supplemental irrigation once established is a non-irrigated
hydrozone.
(u) "infiltration rate" means the rate of water entry into the soil
expressed as a depth of water per unit of time (inches per hour).
(v) "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
gtv~rr~inches per day, month, or year as represented in Section
8-,.2..0.0.70-; 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.
(00) "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
fescue, 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.
(vv) "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. LANDSCAPE 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) 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.
(c) 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) Water Conservation Concept Statement
(2) Calculation of the Maximum Applied Water Allowance
(3) Calculation of the Estimated Applied Water Use
(4) Calculation of the Estimated Total Water Use
(5) Landscape Design Plan
(6) Irrigation Design Plan
(7) Irrigation Schedules
(8) Maintenance Schedule
(9) Landscape Irrigation Audit Schedule
(10) Grading Design Plan
(11) Soil Analysis (if applicable)
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(12) Certificate of Substantial Completion. (To be submitted after
installation of the project).
II. 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.
B. 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
ETo
0.8
LA
0.62
Maximum Applied Water Allowance (gallons per year)
Reference Evapotranspiration (inches per year)
ET Adjustment Factor
Landscaped Area (square feet)
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.
C. 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.
D. Estimated Total Water Use
(1)
A calculation of the Estimated Total Water
with the Landscape Documentation Package.
Water Use may be calculated by sUlluning the
Use shall be submitted
The Estimated Total
amount of wat'?r
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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
(.62)
IE
Estimated Water Use (gallons per year)
Reference Evapotranspiration (inches per year)
plant factor
hydrozone area (square feet)
conversion factor
irrigation efficiency
E. 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), Cd), 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.
F. 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. All
irrigation systems shall be designed to avoid runoff, low
head drainage, overspray, or other similar conditions \vhe~e
water flows onto adjacent property, non-irrigated areas,
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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.
(2) 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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(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 Dot
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.
(3) 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).
G. 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.)
(5) 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.
H. Maintenance Schedules
A regular maintenance schedule satisfying the following conditions shall
be submitted as part of the Landscape Documentation Package:
(1) 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 de thatching 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.
I. 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, wnjrn
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.
J. 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.
K. 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.
L. Certification
(1) 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 88
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 relaced
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.
(3) 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.
1. 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.
2. Information shall be provided by the project developer about
designing, installing, and maintaining water efficient landscapes.
Section 8.20.050: PROVISIONS FOR EXISTING LANDSCAPES
I. WATER MANAGEMENT
All 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.
- 14 -
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: REFERENCE EVAPOTRANSPIRATION in inches (Historical Data,
extrapolated from l2-Month Normal Year ETo Maps and U.C. publication 21426):
County City
Alameda Livermore
Oakland
Jan. Feb. Mar. Apr. May
1.2 1.5 2.9 4.4 5.9
1.5 1.5 2.8 3.9 5.1
Ann.
Jun. Jul. Au~. Sep. Oct. Nov. Dec. ETo
6.6 7.4 6.4 5.3 3.2 1.5 0.9 47.2
5.3 6.0 5.5 4.8 3.1 1.4 0.9 41.8u
SECTION 2: Urgency Ordinance: This prov~s~ons 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:
NOES:
ABSENT:
Mayor
ATTEST:
City Clerk
a:\december\ldscpord
- 15 -
SAMPLE WATER CONSERVATION CONCEPT STATEMENT
Project Site:
Project Number:
Project Location:
Landscape Architect:
Irrigation Designer:
Contractor:
Included in this project submittal package are:
(Check to indicate completion)
3. Estimated Total Water Use:
gallons or cubic feet/year
gallons or cubic feet/year
gallons or cubic feet/year
1. Maximum Applied Water Allowance:
2. Estimated Applied Water Use:
4. Landscape Design Plan
5. Irrigation Design Plan
6. Irrigation Schedules
7. Maintenance Schedule
8. Landscape Irrigation Audit Schedule
9. Grading Design Plan
10.
Soil Analysis
-
(Check One)
New Construction
Rehabilitation
Description of Project:
(Briefly describe the planning and design actions that
are intended to achieve conservation and efficiency in
water use)
Date:
Prepared By:
?;, '~/¡~ 2J
-.;~ ; i
~ ~ ~"-,~~-~--
6Artl ()L£ ~g£ C.{j.'F:::êi~:J. S-tM\.
SAMPLE CERTIFICATE OF SUBSTANTIAL COMPLETION
Project Site:
Project Number:
Project Location:
Preliminary Project Documentation Submitted: (Check indicating submittal)
3. Estimated Total Water Use:
gallons or cubic feet/year
gallons or cubic feet/year
gallons or cubic feet/year
1. Maximum Applied Water Allowance:
2. Estimated Applied Water Use:
4. Landscape Design Plan
5. Irrigation Design Plan
6. Irrigation Schedules
7. Maintenance Schedule
8. Landscape Irrigation Audit Schedule
9. Grading Design Plan
10. Soil Analysis
Post-Installation Inspection: (Check indicating substantial completion)
A. Plants installed as specified
B. Irrigation system installed as designed
_____ dual distribution system for recycled water
minimal runoff or overspray
C. Landscape Irrigation Audit performed
Project submittal package and a copy of this certification have been provided
to owner/manager and to Dublin San Ramon Services District.
COMMENTS:
F;r: ~.~ '1 i;Þ rr
"of. : .-. .~-_ _~ ~ ."; ;j.~' ili¥ ~
sÄ;()1P~4' ~.
3
....~""."'""~..........
¿ç'SG\ e,S1 Cl> mPL.
Certificate of Substantial Completion (Cont.)
Page 2
I/we certify that work has been installed in accordance with the contract documents.
Contractor
Signature
Date
State License #
I/we certify that based upon periodic site observations, the work has been
substantially completed in accordance with the Water Efficient Landscape Ordinance
and that the landscape planting and irrigation installation conform with the
approved plans and specifications.
Landscape Architect Signature
or Irrigation Designer/Consultant
or Licensed or Certified Professional in a Related Field
Date
State License ~
I/we certify that I/we have received all of the contract documents and that it is
our responsibility to see that the project is maintained in accordance with the
contract documents.
Owner
Signature
Date
N
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6/15/92
MODEL
WATER EFFICIENT
LANDSCAPE
ORDINANCE
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2
TEXT OF PROPOSED REGULATIONS
In Division 2, Title 23, California Code of Regulations, add Chapter 2.7,
Sections 490 through 495, inclusive to read as follows:
Chapter 2.7. Model Water Efficient Landscape Ordinance.
INDEX
Page
4
490. Purpose
491. Definitions
5
492. Provisions for New or Rehabilitated Landscapes 11
a. Applicability 11
b. Landscape Documentation Package 1 2
c. Elements of the Landscape Documentation Package 13
1. Sample Water Conservation Concept Statement 1 4
2. Maximum Applied Water Allowance 1 6
3. Estimated Applied Water Use 1 7
4. Estimated Total Water Use 1 7
5. Landscape Design Plan 1 8
(A) Plant Selection and Grouping 1 8
(8) Water Features 18
(C) Landscape Design Plan Specifications 1 9
6. Irrigation Design Plan 1 9
(A) Irrigation Design Criteria 20
(8) Recycled Water 21
(C) Irrigation Design Plan Specifications 22
7. Irrigation Schedules 23
8. Maintenance Schedules 24
9. Landscape Irrigation Audit Schedules 24
10. Grading Design Plan 24
11. Soils 25
12. Certification 26
Sample Cert. of Substanlial Completion 27
d. Public Education 29
493. Provisions for Existing Landscapes
a. Water Management
b. Water Waste Prevention
30
30
30
494: Effective Precipitation 31
Sample Effective Precipitation Disclosure Statement 32
495. Reference Evapotranspiration Rates
33
3
4
490. Purpose.
(a) The State Legislature has found:
(1) that the limited supply of state waters are subject to ever
increasing demands;
(2) that California's economic prosperity depends on adequate
supplies of water;
1
1
(3) that state policy promotes conservation and efficient use
of water;
(4) that landscapes provide recreation areas, clean the air and
water, prevent erosion, offer fire protection, and replace
ecosystems displaced by development; and
(5) that landscape design, installation, and maintenance can
and should be water efficient.
(b) Consistent with the legislative findings, the purpose of this
model ordinance is to:
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t"Ò
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(1) promote the values and benefits of landscapes while
recognizing the need to invest water and other resources as
efficiently as possible;
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01.
(2) establish a structure for designing, installing, and
maintaining water efficient landscapes in new projects; and
(3) establish provisions for water management practices and
water waste prevention for established landscapes.
Note: Authority cited: Sections 65591.5, 65594, Gov. Code. Reference:
Sections 65591, 65591.5, 65597, Gov. Code.
"
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5
491. Definitions.
The words used in this ordinance have the meaning set forth below:
(a) 1Ianti-drain valve" or IIcheck valvell 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) 1Iapplication rate" means the depth of water applied to a
given area, usually measured in inches per hour.
(c) "applied waterll means the portion of water supplied by the
irrigation system to the landscape.
(d) "automatic controllerll means a mechanical or solid state
timer, capable of operating valve stations to set the days and length
of time of a water application.
þ-DT):
(e) "backflow prevention device" means a safety device used to C"v+î.(\":oj
prevent pollution or contamination of the water supply due to the/ \ ;l~JScaf>-E..
reverse flow of water from the irrigation system. Ivv·l9"'%..-.....-
, ~~J
(f) "conversion factor (0.62)" means a number that converts ~ Q:+,
maximum applied water ailowance from acre-inches per acre per L J
year to gallons per square foot per year. The conversion factor is
calculated as follows:
(325,851 gallonsl 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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6
(9) "ecological restoration project" means a project where the
site is intentionally altered to establish a defined, indigenous,
historic ecosystem.
(h) "effective precipitation" or "usable rainfall" means the
portion of total precipitation that is used by the plants.
Precipitation is not a reliable source of water, but can contribute to
some degree toward the water needs of the landscape.
(i) "emitter" means drip irrigation fittings that deliver water
slowly from the system to the soil.
(j) "established landscape" means the point at which plants in
the landscape have developed roots into the soil adjacent to the root
ball.
(k) "establishment period" means the first year after installing
the plant in the landscape.
(I) "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 492 (c) (3).
(m) "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 492 (c) (4).
(0) nET 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.
7
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).
(0) "evapotranspiration1t means the quantity of water evaporated
from adjacent soil surfaces and transpired by plants during a
specific time.
(p) IIflow rate" means the rate at which water flows through
pipes and valves (gallons per minute or cubic feet per second).
(q) IIhydrozoneJ1 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 hydrazone may be irrigated or non-
irrigated. For example, a naturalized area planted with native
vegetation that will not need supplemental irrigation once
established is a non-irrigated hydrazone.
(r) "infiltration rate" means the rate of water entry into the soil
expressed as a depth of water per unit of time (inches per hour).
(s) "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.
(t) "landscape irrigation audit" means a process to perform
site inspections, evaluate irrigation systems, and develop efficient
irrigation schedules.
'.,
8
(u) "landscaped area11 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.
(v) 11lateral line" means the water delivery pipeline that supplies
water ta the emitters ar sprinklers from the valve.
(w) "main line" means the pressurized pipeline that delivers
water from the water source ta the valve or outlet.
(x) "Maximum Applied Water Allowance" means, for design
purposes, the upper limit of annual applied water far the established
landscaped area as specified in Section 492 (c) (2). It is based upon
the area's reference evapotranspi.ration, the ET Adjustment Factor,
and the size of the landscaped area. The Estimated Applied Water
Use shall not exceed the Maximum Applied Water AHowance.
'=~. [ (y) "mined-land reclamation projects" means any surface
~ ... mining operation with a reclamation plan approved in accordance
with the Surface Mining and Reclamation Act of 1975.
(z) 11mulc~" 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 .
{aa} "operating pressure" means the pressure at which a system
of sprinklers is designed to operate, usually indicated at the base of
a sprinkler.
(bb) "overhead sprinkler irrigation systems" means those
with high flow rates (pop-ups, impulse sprinklers, rotors, etc.)
(cc) "overs pray" means the water which is delivered beyond the
landscaped area, wetting pavements, walks, structures, or other non-
landscaped areas.
9
(dd) IIplant factorl1 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.
(ee) "rain sensing device" means a system which automatically
shuts off the irrigation system when it rams.
(1f) "record drawing" or "as-builts" means a set of
reproducible drawings which show significant changes in the work
I
made during construction and which are usually based on drawings
marked up in the field and other data furnished by the contractor.
(gg) "recreational area" means areas of active play or
recreation such as sports fields, school yards, picnic grounds, or
other areas with intense foot traffic.
(h h) "recycled water /' "reclaimed water,11 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.
(ii) I1reference evapotranspiration" or !lET 0" 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 495, 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.
(jj) "rehabilitated landscape" means any relandscaping
that requires a permit.
nr"iøt't
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(kk) "run off" means water which is not absorbed by the sailor
landscape to which it is applied and flows from the area. For
example, run off may result from water that is applied at too great a
rate (application rate exceeds infiltration rate) or when there is a
severe slope.
(II) "soil moisture sensing devicell means a device that
measures the amount of water in the soil.
(mm) "soil texture" means the classification of soil based on the
percentage of sand, silt. and clay in the soil.
(nn) "sprinkler head" means a device which sprays' water through
a nozzle.
(00) "static water pressurell means the pipeline or municipal
water supply pressure when water is not flowing.
(pp) "stationll means an area served by one valve or by a set of
valves that operate simultaneously.
(qq) "tu rf" means a surface layer of earth containing mowed grass
with its roots. Annual bluegrass, Kentucky bluegrass, Perennial
ryegrass, Red fesc':Je. and Tall fescue are cool-season grasses.
Bermudagrass, Kikuyugrass, Seashore paspalum, S1. Augustinegrass,
Zoysiagrass, and Buffalo grass are warm-season grasses.
(rr) "valve" means a device used to control the flow of water In
the irrigation system.
(ss) "water conservation concept statement" means a one-
page checklist and a narrative summary of the project as shown in
Section 492 (c) (1).
Note: Section 65594, Gov. Code. Reference: Section 65597, Gov. Code.
1 1
492. Provisions for New or Rehabilitated Landscapes
(a) Applicability
(1 )
apply to:
Except as provided in Section 492 (a) (3), this section shall
f~~~J [
(A) all new and rehabilitated landscaping for public agency
projects and private development projects that require a
permit; and
(8) developer-installed
family projects.
~:.¡. ~S*¡,~'\ ,~ V\ew
landscaping in ~ingle-familY and
multi-
(2) Projects subject to this section shall conform to the provisions
In Section 492.
(3) This section shall not apply to:
(A) homeowner-provided landscaping at single-family and
multi-family projects;
(8) cemeteries; ,
(C) registered historical sites;
(0) ecological restoration projects that do not require a
permanent irrigation system;
() lÅ- 1"
[(E) mined-land reclamation projects that do not require a
permanent irrigation system; or ~ 5co'O
(F) any project with a landscaped area less than ~ square
feet.
12
(b) Landscape Documentation Package "\\ 'I --.L r
4--'--'2 v.Lt 0 ~ ~ 0\A..... T a
( ß~ lcl(V\J\
(1) A copy of the landscape documentation paCkag~~c~onfOrming to
this chapter shall be submitted to the city or county. No permit shall be
issued until the city or county reviews and approves the landscape
documentation package.
(2) 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 for.varded to the property
owner or site manager.
(3) A copy of the Water Conservation Concept Statement and the
Certificate of Substantial Completion shall be sent by the project -
manager to the local retail waher purveyor;! 1)LLlo\ \ ~ Sd. v\. t:-:a.,^,,-ú\A.... ÇR..YVLU-::-
1) lS*Lc.-T ) pYlOr- -k ~ ~V\.à;\ 5~d \I\. o{.C of~ \?.R.v-W\.Î. T Þl ~ ~~
(4) Each landscape documentation package shall include the l
following elements, which are described in Section 492 (c):
(A) Water Conservation .Concept Statement
(B) Calculation of the Maximum Applied Water Allowance
(C) Calculation of the Estimated Applied Water Use
(D) Calculation of the Estimated Total Water Use
(E) Landscape Design Plan
(F) Irrigation Design Plan
(G) Irrigation Schedules
(H) Maintenance Schedule
(I) Landscape Irrigation Audit Schedule
(J) Grading Design Plan
(K) Soil Analysis
(L) Certificate of Substantial Completion. (To be submitted
after installation of the project.)
[' (5) If effective precipitation is included in the calculation of the
;t Estimated Total Water Use, then an Effective Precipitation Disclosure
o Statement from the landscape professional and the property owner shall
be submitted with the Landscape Documentation Package.
(c) Elements of Landscape Documentation Package
(1) Water Conservation Concept Statement
13
Each landscape documentation package shall include a cover sheet, :-rle..- e:tu
referred to as the w~rJ~onservation Concept Statement.~iffiilaf to lIle...... w t l\ ~v JLp
follO't't'iAg example: I~str\}ef as a check list to verify that the elements of a <)a.~ tz
the landscape documentation package have been completed and has a ~+~LM-~
narrative summary of the project.
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1 4
Sample Water Conservation Concept Statement
Project Site: Praiect Number:
Project Location:
Landscape Architect! Irrigation Designer/ Contractor:
Included in this project submittal package are:
(Check to indicate completion)
1. Maximum Applied Water Allowance:
_____9allons or cubic feet/year
2. Estimated Applied Water Use:
___"':'_9allons or cubic feet/year
.. 2.(a) Estimated Amount of Water Expected from
Effective Precipitation: ___~gallons or cubic feet/year
3. Estimated Total Water Use:
_____9allon5 or cubic feet/year
Note: .. If the design assumes that a part of the Estimated Total
Water Use will be provided by precipitation, the Effective
Precipitation Disclosure Statement in Section 494 shall be
completed and submitted.
4. Landscape Design Plan
5. Irrigation Design Plan
6. Irrigation Schedules
7. Maintenance Schedule
8. Landscape Irrigation Audit Schedule
9. Grading Design Plan
10. Soil Analysis
(Sample Water Conservation Concept Statement, continued)
Description of Project
(Briefly describe the planning and design actions that are intended to
achieve conservation and efficiency in water use.)
Date:
Prepared By:
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(2) The Maximum Applied Water Allowance
(A) A project's Maximum Applied Water Allowance shall be
calculated using the following formula:
MAWA
= (ETo) (0.8) (LA) (0.62) where:
MAWA
ETo
0.8
LA
0.62
= Maximum Applied Water Allowance (gallons per year)
= Reference Evapotranspiration (inches per year)
= ET Adjustment Factor
= Landscaped Area (square feet)
= conversion factor (to gallons per square foot)
(8) Two example calculations of the Maximum Applied Water
lIowance are:
(i) PROJECT SITE ONE: Landscaped area of 50,000 sq. ft. in Fresno
MAW A
= (ETo) (.8) (LA) (.62)
= (51 inches) (.8) (50,000 square feet) (.62)
Applied Water Allowance = 1,264,800 gallons per year
1,691 hundred-cubic-feet per year: 1,264,800/748=1,691)
Maximum
(or
(ii) PROJECT SITE TWO: Landscaped area of 50,000 sq. ft. in San
Francisco
MAWA = (ETo) (.8) (LA) (.62)
= (35 inches) (.8) (50,000 square feet) (.62)
Maximum Applied Water Allowance = 868,000 gallons per year
(or 1,160 hundred-cubic-feet per year)
(C) 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.
1 7
(3) Estimated Applied Water Use
(A) The Estimated Applied Water Use shall not exceed the Maximum
Applied Water Allowance.
(8) 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 recommendßd in the
irrigation schedule.
(4) Estimated Total Water Use
(A) 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 recommended in the irrigation schedule and adding
any amount of water expected fram effective precipitation (not to
exceed 25 percent of the local annual mean precipitation) or may be
calculated from a formula such as the following:
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 (hydrazone) = Estimated Water Use (gallons per year)
ETo = Reference Evapotranspiration (inches per year)
PF = plant factor
HA = hydrozone area (square feet)
(.62) = conversion factor
IE = irrigation efficiency
Î 8
(8) If the Estimated Total Water Use is greater than the
Estimated Applied Water Use due to precipitation being
included as a source of water, an Effective Precipitation
Disclosure Statement such as the one in Section 494 shall be
included in the Landscape Documentation Package.
(S) Landscape Design Plan
A landscape design plan meeting the following requirements shall be
submitted as part of the landscape documentation package.
(A) Plant Selection and Grouping
(i) 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
AJJ the specifications set forth in (ii), (iii) and (iv).
'(~ .t-...e y'\Q-V'-UL -\-'ö >
J.öc.~'.N\.~ /(ii) Plants having similar water use shall be grouped together
CrY'\. to~ in distinct hydrozones.
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(iii) 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.
(iv) 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 local fire
departments or the California Department of Forestry.
(B) Water Features
(i) Recirculating water shall be used for decorative water
features.
(ii) Pool and spa covers are encouraged.
19
(C) Landscape Design Plan' Specifications
The landscape design plan shall be drawn on project base sheets at a
scale that accurately and clearly identifies:
(i) Designation of hydrozones.
.'
(ii) 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.
(iii) Property lines and street names.
(iv) Streets, driveways, walkways, and other paved areas.
(v) Pools. ponds, water features, fences. and retaining walls.
(vi) Existing and proposed buildings and structures including
elevation if applicable.
(vii) Natural features including but not limited to rock
outcroppings, existing trees, shrubs that will remain.
(viii) Tree staking, plant installation, soil preparation details, and
any other applicable planting and installation details.
(ix) A calculation of the total landscaped area.
(x) Designation of recreational areas.
(6) Irrigation Design Plan
An irrigation design plan meeting the following conditions shall be
submitted as part of the Landscape Documentation Package.
20
(A) Irrigation Design Criteria
(i) Runoff and Overspray. Soil types and infiltration rate shall
be considered when designing irrigation systems. All 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, 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.
(ii) 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.
(i i i) Equipment.
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Water meters. Separate landscape water meters shall be
installed for all projects except for single family homes or
any project with a landscaped area of less than 5,000 square
fe et.
Controllers. Automatic control systems shall be required for
all irrigation systems and must be able to accommodate all
aspects of the design.
21
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 3hall be I t;l. uil eå on all irrigation systems.
a('{¿ ~~~
Soil Moisture Sensing Devices. It is recommended that
soil moisture sensing devic~s be considered where appropriate.
(B) Recycled Water
(i) 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 (B) (ii).
(ii) Irrigation systems shall make use of recycled water unless a. ,
written exemption has been granted by the local water agellcy, \)\S..h--LG-+
stating that recycled water meeting all health standards is not
available and will not be available in the foreseeable futurex "pov- +-kt ~ '.J...
p ô,,*,,-c.v---'¥c V ~ \. L(¡
(iii) The recycled water irrigation systems shall be designed and
operated in accordance with all local and state codes.
22
(C) 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 492 (c) (5) (C).
The irrigation design plan shall accurately and clearly identify:
(i) Location and size of separate water mete rs for the I~ndscape)l ï \ "- r ~\~l<
(ii) 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.
(iii) Static water pressure at the point of connection to the public
water supply.
~iv) Flow rate (gallons per minute), application rate (inches per
hour), and design operating pressure (psi) for each station.
(v) Recycled water irrigation systems as specified in the Section
492 (c) (4) (B).
23
(7) Irrigation Schedules
Irrigation schedules satisfying the following conditions shall be
submitted as part of the Landscape Documentation Package.
(A) An annual irrigation program with n:onthly irrigation schedules
shall be required for the plant· establishment period, for the established
landscape, and for any temporarily irrigated areas.
(B) The irrigation schedule shall:
(i) include run time (in minutes per cycle), suggested number
of cycles per day, and frequency of irrigation for each station;
and
(ii) provide the amount of applied water (in hundred cubic l "
feet. gallons, or in whatever billing units the -Iecal waler \', ...-t.-'0>-t
supplier: uses) recommended on a monthly and annual basis.
(C) 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 hydrazone.
(D) 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.)
(E) 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.
(F) Whenever possible, landscape irrigation shall be scheduled
between£,OOr ~_n,. and W.O<r a_m- to avoid irrigating during times of high
wind or high(emperature. \.-. . -
'1'.DO~ . 7'<= Þt'\ -.' '.
24
(8) Maintenance Schedules
A regular maintenance schedule satisfying the following conditions
shall be submitted as part of the Landscape Documentation Package:
(A) 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;
1ertilizing; pruning, and weeding in all landscaped areas.
(B) Whenever possible, repair of irrigation equipment shall be done
with the originally specified materials or their equivalents.
(9) 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 or county as part of the Landscape Documentation Package.
(A) 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 Auditor
Handbook (J une 1990) version 5.5 [formerly Master Auditor Training].) 10'" as M-è-~
, / b.Æ- LLpck..-~..ræ1
(B) The schedule shall provide for landscape irrigation audits to be
conducted by certified landscape irrigation auditors at least once every
five years)W SM,~-k,~ t",~ I LlJ<>--hv ru.v~",y--) -tL..
<D~ S~~ÓŸ\. Sa..yVL-ú> D'~~lc....i-.
(10) Grading Design Plan
Grading design plans satisfying the following conditions shall be
submitted as part of the Landscape Documentation Package.
(A) 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.
25
(8) 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. .
(11) Soils / ~pYo.\«---r..)Nì~ \~;:!O'"V\S~~::::-,-,,*(~r)
(A) A soil analysis.' satisfying the following conditions shall be f~ y s-J ,>lï') "-
submitted as part of the Landscape Documentation Package. \~ cYY ~") sf-
d-~ ~ ~l \a-t.,
(i) Determination of soil texture, indicating the percentage of
organic matter.
(ii) 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.
(iii) Measure of pH, and total soluble salts.
areas
(B) A mulch of at least three inches shall be applied to all planting
except turf. . I b \ I' \ - ,/", 'ZDOð'O S .¡::(a.vJ.. V'-t) ~C~ \5
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(12) Certification
(A) 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
:492 (c)(9)(A)).
(8) 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 shall provide a certificate
of substantial completion to the city or county. 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.
(C) Certification shall be accomplished by completing a Certificate
of Substantial Completion and delivering it to the city or county, to the
retail water supplier, and to the Owner of Record. ^ sample of such Q
'Qr~h¿~: ~\ov~~~~~t :!~:.:e;1-~ ~~~ ~~¿.h.-", ~vM. .
~\~~ ~v-öycl\~
Lø~ .M:'~ a~ h~- Ö'\.L-""f
27
SAMPLE CERTIFICATE OF SUBSTANTIAL COMPLETION
Project Site:
Project Location:
Project Number:
Preliminary Project Documentation Submitted: (check indicating
submittal)
1.
2.
Maximum Applied Water Allowance:
(gallons or cubic feet per year)
Estimated Applied Water Use:
(gallons or cubic feet/year)
Estimated Amount of Water Expected from
P reci pitatio n :_____ (gallons 0 r cu bic feet/year)
2a.
Effective
3. Estimated Total Water Use:
__ (gallons or cubic feet/year)
Note: . If the design assumes that a. part of the Estimated Total Water
Use will be provided by precipitation, the Effective Precipitation
Disclosure Statement in Section 495 shall be completed and submitted.
The Estimated Amount of Water Expected from Effective Precipitation
shall not exceed 25 percent of the local annual mean precipitation
(average rainfall.)
4. Landscape Design Plan
___ 5. Irrigation Design Plan
6. Irrigation Schedules
7. Maintenance Schedule
8. Landscape Irrigation Audit Schedule
9. Grading Design Plan
10. Soil Analysis
post-Installation Ins pection: (Check indicating substantial
completion)
A. Plants installed as specified
8. Irrigation system installed as designed
dual distribution system for recycled water
minimal fun off or overspray
C. Landscape Irrigation AudÜ-performed
28
(Certificate of Sub'stantial Completion, continued)
_Project submittal package and a copy of this certification has been
provided to owner/manager and local water agency
Comments:
I/we certify that work has been installed in accordance with the contract
documents.
I
-------------------------------------
Contractor
Signature
Date State License Number
IIwe certify that based upon periodic site observations, the work has been
substantially completed in accordance with the Water Efficient Landscape
Ordinance and that the landscape planting and irrigation installation
conform with the approved plans and specifications.
-------------------------------------
Landscape Architect Signature Date State license Number
or Irrigation Designer/Consultant
or Licensed or Certified Professional in a Related Field
I/we certify that I/we have received all of the contract documents and
that it is our responsibility to see that the project is maintained In
accordance with the contract documents.
Owner
Signature
Date
Note: Authority cited: Section 65594, Gov. Code. Reference: Section
65597, Gov. Code.
29
(d) Public Education
(1) publications.
(A) Local agencies shall provide information to owners of all newl 0 lÅ" T
single family residential homes regarding the design, installation, and ...J
maintenance of water efficient landscapes.
. i ~ d.\J~\ e-~__~
" (B) Information about the efficient use of landscape water sh::lll be- ....L
1Jr~vít e& to water users throughout the community" ~rð~ ~~ '\); ~~C)\.
(2) 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.
(A) 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.
(B) Information shall
maintaining water efficient
by ---t-hR.. f YD' J 0. d- d Q v~ 0- ¡?.Q..Y-
be provided~bout designing, installing, and
landscapes.
Note: Authority cited: Section 65594, Gov. Code. Reference: Section
65597.
';
30
493. PROVISIONS FOR EXISTING LANDSCAPES.
(a) Water Management \.N't
All existing landscaped areas -tEr-whic", the city er CGUflty provid~
wa.ter that are one acre or more, including golf courses, green belts,
common areas, multi-family housing, 5chool5, businesses, parks,
c~meteries, and publicly owned landscapes shall have a landscape
irrigation audit 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, Wate~ I 0 l +-S
Conservation Office (JuÇ1e 1990) version ~.5.) (.9'(" as VVVd>\ \o..tz... LL~d6faO.. ",c..$.~
s,^e1A. ~ r¥'t.St2V'\ ~Gt tc ~1)l ~~lc..t ~1('~Vl..e.uJ ..
(1) If the project's water bills indicate that they are using less ]
than or equal to the Maximum Applied Water Allowance for that project ð J
site, an audit shall not be required.
(2) Recognition of projects that stay within the Maximum Applied
Water Allowance is encouraged.
(b) Water Waste Prevention
Cities and counties shall prevent, water waste resulting
inefficient landscape irrigation by prohibiting runoff, low head
overspray, or other similar conditions where water flows onto
property, non-irrigated areas, walks, roadways, or structures.
for violation of these prohibitions shall be established locally.
from
drainage,
adjacent
Penalties
ð \Å/t
(Authority cited: Section 65594, Gov. Code. Reference: Section 65597,
Gov. Code.)
~hsr.<- \J.J-'.eY?"..\U..:h~ sbt\ ~~\~£V~ ~~~Î
tS> ~ ~ U l stv-t.c./"
31
Section 494.
Effective Precipitation
If effective precipitation is included in the calculation of the
Estimated Total Water Use, an Effective Precipitation Disclosure
Statement (similar to the following Sample Effective Precipitation
Disclosure Statement) shall be completed, signed, and submitted with the
Landscape Documentation Package. No more than 25 percent of the local
annual mean precipitation shall be considered effective precipitation in
the calculation of the Estimated Total Water Use.
ðLèt
o LL-'t'
32
SAMPLE EFFECTIVE PRECIPIT ATtON DISCLOSURE STATEMENT
I certify that I have informed the project owner and developer that this
project depends on (gallons or cubic feet) of effective
precipitation per year. This represents percent of the local mean
precipitation of inches per year.
I have based my assumptions about the amount of precipitation that IS
effective u po n:
--------------------------------------------
---------------------------------
----------------.----------------------
I certify that I have informed the project owner and developer that in
times of droug ht, there may not be enough water available to keep the
entire landscape alive.
----------------"------
Licensed or Certified Landscape Professional
1 certify that I have been informed by the licensed or certified landscape
professional that this project depends upon (gallons or cubic feet)
of effective precipitation per year. This represents percent of
the local mean precipitation of inches per year.
I certify that I have been informed that in times of drought, there may not
be enough water available to keep the entire landscape alive.
Owner
Developer
33
495.
REFERENCE EVAPOTRANSPIRATION
in inches (Historical Data, extrapolated from
ETo Maps and U.C. publication 21426)
12-Month Normal Year
Ann.
County City Jan Feb Ma' AfJr May Jun Jut AUQ See Oct Nov Dee 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
Oaldand 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
Aloine Mar1<!eeville 0.7 0.9 2.0 3.5 5.0 6.1 7.3 6.4 4.4 2.6 1.2 0.5 40.5
Amador Jackson 1.2 1.5 2.8 4.4 6.0 7.2 7.9 7.2 5.3 3.2 1.4 0.9 48.9
Bu tte Chico 1.2 1.8 2.9 4.7 6.1 7.4 8.5 7.3 5.4 3.7 1.7 1.0 51.7
GrXjley 1.2 1.8 3.0 4.7 6.1 7.7 8.5 7.1 5.4 3.7 1.7 1.0 51.9
Oroville 1.2 1.7 2.8 4.7 6.1 7.6 8.5 7.3 5.3 3.7 1.7 1.0 51.5
Calaveras San Andreas 1.2 ' 1.5 2.8 4.4 6.0 7.3 7.9 7.0 5.3 3.2 1.4 0.7 48.8
Colusa Colusa 1.1 1.7 2.8 4.8 6.6 7.4 8.2 7.0 5.7 3.5 1.7 1.0 51.4
Wi!1i<imS 1.2 1.7 2.9 4.5 6.1 7.2 8.5 7.3 5.3 3.4 1.6 1,0 50.8
Contra CoS1a Benicia 1.3 1.4 2.7 3.8 4.9 5.0 6.4 5.5 4.A. 2.9 1.2 0.7 40.3
Brentwood 1.0 1.5 2.9 4.5 6.1 7.1 7.9 6.7 5.2 3.2 1.4 0.7 48.3
Courtland 0.9 1.5 2.9 4.4 6.1 6.9 7.9 6.7 5.3 3.2 1.4 0.7 48.0
Concord 1.1 1.4 2.4 4.0 5.5 5.9 7.0 6.0 4.8 3.2 1.3 0.7 43.4
Martinez 1.2 1.4 2.4 3.9 5.3 5.6 6.7 5.6 4.7 3.1 1.2 0.7 41.8
Pittsburg 1.0 1.5 2.8 4,1 5.6 6.4 7.4 6.4 5.0 3.2 1.3 0.7 45.4
Del Norte Crescent City 0.5 0.9 2.0 3.01 3.7 3.5 4.31 3.7 3.0 2.0 0.9 0.5 27.7
EI Dorado Camino 0.9 1.7 2.5 3.9 5.9 7.2 7.8 6.8 5.1 3.1 1.5 0.9 47.3
Fresno Clovis 1.0 1.5 3.2 4.8 6.4 7.7 8.5 7.3 5.3 3.4 1.4 0.7 51.4
Coalinga 1.2 1.7 3.1 4.6 6.2 7.2 8.5 7.3 5.3 3.4 1.6 0.7 50.9
Five POInts 0.9 1.7 3.3 5.0 6.6 7.7 8.5 7.3 5.4 3.4 1.5 0.9 52.1
Fresno 0.9 1.7 3.3 4.8 6.7 7.8 8.4 7.1 5.2 3.2 1.4 O.Õ 51.1
Friant 1.2 1.5 3.1 4.7 6.4 7.7 8.5 7.3 5.3 3.4 1.4 0.7 51.3
Kerman 0.9 1.5 3.2 4.8 6.6 7.7 8.4 7.2 5.3 3.4 1.4 0.7 51.2
Kingsburg 1.0 1.5 3.4 4.8 6.6 7.7 8.4 7.2 5.3 3.4 1.4 0.7 51.6
Reedlev 1.1 1.5 3.2 4.7 6.4 7.7 8.5 7.3 5.3 3.4 1.4 0,7 51.3
Gienn Oriana 1.2 1.7 3.1 4.8 6.7 7.4 8.8 7.3 5.8 3.8 1.7 1.1 53.3
Willows 1.2 1.7 2,9 4.7 ô.l 7.2 8.5 7.3 '5.3 3.ô 1.7 1.0 51.3
HumOoldt EureKa 0.5 1.1 2.0 3.0 3.7 3.7 3.7 3.7 3.0 2.0 0.9 0.5 27.5
Ferndale 0.5 1 .1 2,0 3.0 3.7 3.7 3.7 3.7 3.0 2.0 0.9 0.5 27.5
Garbe(\lllle 0.6 1.2 2.2 3.1 4.5 5.0 5.5 4.9 3.8 2.4 1.0 0.7 34.9
Hoooa 0.5 1.1 2.1 3.0 4.4 5.4 6.1 5.1 3.8 2.4 0.9 0.7 35.6
Imperial Brawley 2.8 3.8 5.9 8.0 10.4 11.5 11.7 10.0 8.4 6.2 3.5 2.1 84.2
CaJipatna 2.9 3.9 6.1 8.3 10.5 11.8 12.0 10.4 8.6 6.5 3.8 2.3 86,9
EICentro 2.7 3.5 5.6 7.9 10.1 11.1 11.6 9.5 8.3 6.1 3.3 2.0 81.7
Hottville 2.8 3.8 5.9 7.9 10.4 11.6 12.0 10.0 8.6 6.2 3.5 2.1 84.7
Yuma 3.1 4.1 6.6 8.7 11.0 12.4 12.7 11.0 8.9 6.6 4.0 2.6 91.5
Inyo BishOp 1.7 2.7 4.8 6.7 8.2 10.9 7.4 9.6 7.4 4.8 2.5 1.6 68.3
Death Valley 2.2 3.3 5.4 7.7 9.8 11.1 11.4 10.1 8.3 5.4 2.9 1.7 79.1
Independence 1.7 2.7 3.4 6.6 8.5 9.5 9.8 8.5 7.1 3.9 2.0 1.5 65.2
Lower Haiwee 1.8 2.7 4.4 7.1 8.5 9.5 9.8 8.5 7.1 4.2 2.6 1.5 67.6
Oasis 2.7 2.8 5.9 8.0 10.4 11.7 11.6 10.0 8.4 6.2 3.4 2.1 83.1
Kern Arvin 1.2 1.8 3.5 4.7 6.6 7.4 8.1 7.3 5.3 3.4 1.7 1.0 51.9
Bakersfield 1.0 1.8 3.5 4.7 6.6 7.7 8.5 7.3 5.3 3.5 1.6 0.9 52.4
8uttonwil1ow 1.0 1.8 3.2 4.7 6.6 7.7 8.5 7.3 5.4 3.4 1.5 0.9 52.0
Delano 0.9 1.8 3.4 4.7 6.6 7.7 8.5 7.3 5.4 3.4 1.4 0.7 52.0
Grapevine 1.3 1.8 3.1 4.4 5.6 6.8 7.6 6.ô 5.9 3.4 . " . " ," c:
I..;) I.V ....;;.....J
China Lake 2.1 3.2 5.3 7.7 9.2 10.0 11.0 9.8 7.3 4.9 2.7 1.7 74.8
Inyokem 2.0 3.1 4.9 7.3 8.5 9.7 11.0 9.4 7.1 5.1 2.6 1.7 72.4
tS3be1.a Dam 1.2 1.4 2.8 4.4 5.8 7:-3 7.9 7.0 5.0 3.2 1.7 0.9 48.4
Lost Hills 0.6 1.1 2.6 4.4 7.0 7.7 8.5 7.1 5.0 3.9 0.8 0.4 49.0
Shatter 1.0 1.7 3.4 5.0 6.6 7.7 8.3 7.3 SA 3.4 1.5 0.9 52.1
Tatt 1.3 1.8 3.1 4.3 6.2 7.3 8.5 7.3 SA 3.4 '. 1.7 1.0 51.2
Tehachaoi 1.4 , .8 3.2 5.0 6.1 7.7 7.9 7.3 5.9 3.4 '2.1 1.2 52.9
u.s~
f'\:2- ~
J~
34
Section 495 Continued
I Ann.
County City Jan Fat> Mal AOf Ma'Y Jun Ju AUQ Sec Oc1 Nov Dee Eto
Kings Corcoran 0.9 1.5 3.3 5.2 7.2 7.9 8.4 7.3 5.8 3.4 1.4 0.7 53.1
Hanford 0.9 1.5 3.4 5.0 6.6 7.7 8.3 7.2 5.4 3.4 1.4 0.7 51.5
Kettleman City 1.0 1.8 3.4 5.3 7.2 7.9 8.4 7.4 5.9 3.7 1.7 1.0 54.6
lemoofe 0.9 1.5 3.4 5.0 6.6 7.7 8.3 7.3 5.4 3.4 1.4 0.7 51.7
Lake Lakeport 1.1 1.3 2.6 3.5 5.1 6.0 7.3 6.1 4.7 2.9 1.21 0.9 42.8
lower lake 1.2 1.4 2.7 . 4.5 5.3 6.3 7,4 6.4 5.0 3.1 1.3 0.9 45.4
Lassen Ravendale 0.6 1.1 2.3 4.1 5.6 6.7\ 7.9 7.3\ 4.7 2.8 1.2 0.5144,9
SusanviIle 0.7 1.0 2.2 4.1 5.6 6.5 7.8 7.0 4.6 2.8 1.2 0.5 44.0
Los Angeles Burbank 2.1 2.8 3.7 4.7 5.1 6.0 6.6 6.7 5.4 4.0 2.6 2.0 51.7
G!endora 2.0 2.5 3.6 4.9 5.4 6.1 7.3 6.8 5.7 4.2 2.6 2.0 53.1
Gorman 1.6 2.2 3.4 4.6 5.5 7.4 7.7 7.1 5.9 3.6 2.4 1.1 52.4
Lancaster 2.1 3.0 4.6 5.9 8.5 9.7 11.0 9.8 7.3 4.6 2.8 1.7 71.1
Los Angeles 2.2 2.7 3.7 4.7 5.5 5.8 6.2 5.9 5.0 3.9 2.6 2.0 50.1
Long Beach 2.2 2.5 3.4 3.8 4.8 5.0 5.3 4.9 . - 3.4 2.4 2.0 44.0
".:J
Palmdale 2.0 2.7 4.2 5.1 7.6 8.5 9.9 9.8 6.7 4.2 2.6 1.7 64.8
Pasadena 2.1 2.7 3.7 4.7 5,1 6.0 7.1 6.7 5.6 4.2 2.6 2.0 52.3
Pearblossom 1.7 2.4 3.7 d.7 7.3 7.7 9.9 7.9 6.4 d.O 2.6 1.â -Q Q
:J_._
Redondo Beach 2.2 2.d 3.3 3.8 d.5 A..7 SA 4.8 4.4 2.8 2.4 2.0 42.6
San Fernando 2.0 2.7 3.5 4.6 5.5 5,9 7.3 6.7 5.3 3.9 2.6 2.0 52.0
Madera Chowchiila 1.0 1.4 3.2 d.7 6.6 7.8 8.5 7.31 5.31 - ~I 1..1 0.7 51 41
.j.
Madera 0.9 1.4 3.2 d.8 6.6 7.8 8.5 7.3 5.3 3.d 1..1 0.7 51.5
Raymor.d 1.2 1.5 3.0 4.6 6.1 7.6 8..1 7.3 5.2 3.0<1 1.d 0.7 50.5
Mann Novato 1.3 1.5 2.4 3.5 4.4 6.0\ 5.9 5.41 4.4 2.B 1.4 0.ìI39.S
San Rafael 1.2 1.3 2.4 3.3 4.0 4.B 4.8 0<1.9 .1,3 2.7 1.3 0.7 35.3
Mariposa Coulter-lIile 1.1 1.51 2.8\ 4.4\ 5.9 7.3 B.l 7'°1 5'31 3.4 1.4 0.7\48.8
Mariposa 1.1 1.5 2.B 4.4 5.9 74 8.2 7.1 5,0 3.4 1.4 0.7 49,0
Yosemite Villace 0,7 1.0 2.3 3,7 5.1 6.5 7.1 6.1 4,4 2.9 1.1 0.6 41.4
Mencoc:nO Fort Bragg 0.9 1.3 2.2 3.0 3.7 3,5 3.7 3.1 ],0 2.3 1.2 OJ 29.0
Point Arena 1.0 1.3 2.3 3.0 3.7 3.9 3.ï 3.7 3.0 2.3 1.2 0.7 29.6
Hopland 1.1 1.3 2.6 3.4 5.0 5.9 6.5 5J 4.5 2.8 1.3 0.7 40.9
Ukiah 1.0 1.3 2.6 3.3 5.0 5.8 6.7 5.9 4.5 2.8 1.3 0.7 40.9
Merced Merced 1.0 1.5 3.2\ 4.7 6.6 7.9 8.5 7.21 5.3 3.4 1.4 0.7 51.5
Los Banos 1.0 1.5 3.2 4.7 6.1 7.4 8.2 7.0 5.3 3.4 1.4 0.7 50.0
Mono Bridoeoort 0.7 0.9 2.2 3.8 5.5 6.61 7.d 6.71 4.7 2.7 1.21 0.5 43.0
Monterey Castroviile 1.6 1.8 2.7 3.5 4.4 4.4 4,5 d.2 3.8 2.8 1.8 1.3 36.7
King City 1.7 2.0 3.4 4.4 4.4 5.6 6.1 6.7 6.5 5.2 2.2 1.3 49.6
Long Valley 1.5 1.9 3.2 4.1 5.8 6.5 7.3 6.ï 5.3 3.6 2.0 1.2 49.1
Monterey 1.7 1.8 2.7 3.5 4.0 4.1 d.3 4.2 3.5 2.8 1.9 1.5 36.0
Salinas 1.6 1.9 2.7 3.8 4.8 4.7 5.0 4.5 4.0 2.9 1.9 1.3 39.1
Soledad 1.7 2.0 3.4 4.4 5.5 5.4 6.5 6.2 5.2 3.7 2.2 1.5 47.7
Napa Sl Helena 1.2 1.5 2.8 3.9 5.1 6.11 7.0 6.2 4.8 3.1 1.4 0.9 44.1
Yountville 1.3 1.7 2.8 3.9 5.1 6.0 7.1 6.1 4.8 3.1 1.5 0.9 44.3
Nevada Grass Valley 1.1 1.5 2.6 4.0 5.7 7 ~ 1 7.9 7.1 5.3 3.21 1.51 C.9 48.Q
Nevada City 1.1 1.5 2.6 3.9 5.8 6.9 7.9 7.0 5.3 3.2 1.4 0.9 d7.4
Orange Santa Ana 2.2 2.7 3.7 4.5 4.6 5.4 6- 6.1 4.7 3.7 2.5 2.0 482
.¿
Laquna Beach 2.2 2.7 3.4 3.8 4.6 4.6 4 Q 4.9 4A 3.4 2.4 2.0 43.2
,.~
Placer Auburn 1.2 1.7 2.8 4.4 -6.1 7.4 8.3 7.3 5.4 3.4 1.6 1.0 50.6
Blue Canyon 0.7 1.1 2.1 3A 4.8 5.0 7.2 6.1 4.6 2.9 0.9 0.6 40.5
Colfax 1.1 1.5 2.6 4.0 5.8 7.1 7.9 7.0 5.3 3.2 1.4 0.9 47.9
Soda Springs 0.7 0.7 1.8 3.0 4.3 5.3 6.2 5.5 4." 2.5 0.7 0.7 35.4
Tahoe City 0.7 0.7 1.7 3.0 4.3 5.4 6.1 5.6 4.1 2.4 0.8 0.6 ·35.5
-r'"__ ._1, __ ,,-, 1"\, 1 , ~ ? 44 " .1 6.4 5.7 4.1 2.d. 0.8 0,6 362
35
Section 495 Continued
Ann.
County City Jar Feb Mar AfJr May Jun Ju AUQ Sec Oc Nov Dec E!o
Plumas Quincy 0.7 0.9 2.2 3.5 4.9 5.9 7.3 5.9 4.4 2.8 1.2 0.5 40.2
Portola 0.7 0.9 2.0 3.5 4.9 5.9 7.3 5.9 4.3 2.7 0.9 0.5 39.4
Riverside Beaumont 2.0 2.3 3.4 4.4 6.1 7.1 7.6 7.9 6.0 3.9 2.6 1.7 55.0
Blythe 3.2 4.2 6.7 8.9 11.1 12.4 12.8 11.1 9.1 6.7 4.0 2.7 92.9
Co ache lIa 2.9 4.4 6.2 8.4 10.5 11.9 12.3 10.1 8.9 6.2 3.8 2.4 88.1
Desert Center 2.9 4.1 6,4 8.5 11.0 12.1 12.2 11.1 9.0 6.4 3.9 2.6 90.0
\ Elsinore 2.1 2.8 3.9 4.4 5.9 7.1 7.6 7.0 5.8 3.9 2.6 2.0 55.0
India 2.9 4.0 6.2 8.3 10.5 11.9 12.3 10.0 8.9 6.4 3.8 2A 87.6
Palm Desert 2.0 3.5 4.9 7.7 8.5 10.6 9.8 9.2 8.4 6.1 2.7 1.8 75.1
Palm Springs 2.0 2.9 4.9 7.2 8.3 8.5 11.6 8.3 7.2 5.9 2.7 1.7 71.1
Riverside 2.1 2.9 4.0 4.1 6.1 7.1 7.9 7.6 6.1 4.2 2.6 2.0 c;- -
~O.O
Sacramento Roseville 1.1 1.71 3.11 4.7 6.21 7.7 8.5 7.3 5.61 3.7 1. ì 1.0 52,2
Sacramento 1.0 1.8 3.2 4.7 6.4 7.7 8.4 7.2 5.4 3.7 1.7 0.9 51.9
San Benito Hollister I 1.51 1.8\ 3,1\ A '1 5.51 5.ìl 6.41 5.9 5,01 3.51 1. ìl 1.11 .:s. ~
-.....
San Bernardino Bakar 2.7 3.9 6.1 8.3 lOA 11.3 12.2 11.0 8.9 6.1 3.3 2.1 86.5
Barstow 2.6 3.6 5.7 7.9 10.1 11.6 12.0 10.4 8.6 5.7 3.3 2.1 83.6
Chino 2.1 2.9 3.9 4.5 ~.7 6.5 7.3 7.1 5.9 4.2 2.6 2.0 5 A -
",0
Crestline 1.5 1.9 3.3 4.4 5.5 6.6 7.8 7.1 5.4 3.5 2.2 1.5 50.8
Needles 3.2 4,2 6.6 8.9 11.0 12.4 12.8 11.0 8.9 6.6 4.C 2.7 92.1
Lucerna Yalley 2,2 2.9 5.1 6.5 9.2 11.0 11.4 9.9 7.t. 5.e 3.0 1.8 75.3
San Bernardino 2.0 2.7 3.5 4.6 5.7 6.9 7.9 7.4 5.9 4.2 2.6 2.0 55.ô
Twenrynine Palms 2.ô 3.6 5.9 7.9 10.1 11.2 11.2 10.3 8.6 5.9 3.4 2.2 82.9
Vic!orville 2.3 3.1 4,9 6.7 9,3 10.0 11.2 9.8 7.4 5,1 2.5 1.8 74.6
San Diego Chula Vista 2.2 2.7 3.4 3.8 4.9 4.7 5.5 .1.9 4.5 3.4 2.d 2.0 ~.2
Escondido 2.1 2.8 3.8 4.7 5.ô ô.7 6.8 6.5 5.4 3.8 2.5 2.0 52.6
Ocaansid a 2.2 2.ì 3 ' 3.7 4,9 4.6 4 - 5. i 4.1 3.3 2.4 2.0 42.9
." .0
Pine Valley , .5 2.4 3.8 5.1 6.0 7.0 7.8 7.3 6.0 4.0 2.2 1.7 54.8
Ramona 2.1 2.5 4.0 4.7 c; - 6.5 7.3 7.0 5.6 3.9 2.5 1.Ï 53.4
~.O
San Diego 2.2\ 2.5 ~.~ 3.4 4,4 4.0 4..6 4.6 3.9 3,3 2.2 2.8 40.6
Santee 2. Î 2.7 3.ï 4.5 - c: 6.1 6.6 6.2 5.4 3.8 2.6 2.0 51.1
::>,~
Warnar Sennes 1.6 2.7 3.7 4.7 5.7 7.6 8.3 7.7 6.3 4,0 2.5 1.3 5ô.0
San Francisco San Francisco 1.5 1.3 2.41 3.0 3.7 4.6 4.9 4.8 4.1 2.8 1.3 0.7 35.1
San Joaquin Farmington 1.5 1.5 2.9 4.ì 6.2 7.6 8.1 6.8 5.3 3.3 1.4 0.7 50.0
Lodi 0.9 1.5 2.9 5.1 6.5 7.0 7.7 7.7 5.2 3.1 1.3 0.7 49.5
Mantoca 1.5 l.S 3.0 4.7 6.4 7.6 8.1 6.8 5.3 3.3 1.4 0.6 50.1
Stockton 0.8 1.5 2.9 4.7 6.2 7.4 8.1 6.8 5.3 3.2 1.4 0.6 49.1
Tracy 1.0 1.51 2.9 4.5 6.1 7.3 7.9 6.7 5.3 3.2 1.3 0.7 48.5
San Luis Obispo Arroyo Grande 2.0 2.2 3.2 3.8 4.3 4.7 4.3 4.6 3.8 3.2 2.4 1.7 40.0
Atascadero 1.2 1.5 2.8 3.9 4.5 6.0 6.7 6.2 5.0 3.2 1.7 1.0 <1.3.7
Morro Bay 2.0 2.2 3.1 3.5 4.3 4.5 4.6 4.6 3.8 3.5 2.1 1.7 39.9
Paso Robles 1.6 2.0 3.2 4.3 5.5 6.3 7.3 6.7 5.1 3.7 2.1 1.4 49.0
San Luis Obispo 2.0 2.2 3.2 4.1 4.9 5.3 4.6 5.5 4.4 3.5 2.4 1.7 <1.3.8
San Miguel 1.6 2.0 3.2 4.3 5.0 6.4 7.4 6.8 5.1 3.7 2.1 1.4 49.0
San Simeon 2.0 2.0 2.9 3.5 .:1..2 4.4 4.6 4.3 3.5 3.1 2.0 1.7 38.1
San Mateo Halt Moon Bay 1.5 1.71 2.41 3.0 3.9 4.3 4.3 4.2 3.5 2.8 1.3 1'°133.7
Redwood City 1.5 1.8 2.9 3.8 5.2 5.3 6.2 5.6 4.8 3.1 1.7 1.0 42.8
Santa Barbara Carpentaria 2.0 2.4 3.2 3.9 4.8 5.2 5.5 5.7 4.5 3.4 2.4 2.0 44.9
Guadalupe 2.0 2.2 3.2 3.7 4.9 4.5 4.5 4.6 4.1 3.3 2.4 1.7 41.1
Los Alamos 1.8 2.0 3.2 4.1 4.9 5.3 5.7 5.5 4.4 3.7 2.4 1.6 44.6
Lompoc 2.0 2.2 3.2 3.7 4.8 4.6 4.9 4.8 3,.9 3.2 ,2.4 1.7 41.1
Santa Barbara 2.0 2.5 3.2 3.8 4.6 5.1 5.5 4.5 3.4 2.4 1,.8 1.8 40.6
Santa Maria 1.8 2.2 3.2 4.0 5.0 5.1 5.1 5.1 4.5 3.5 2.4 1.7 43.7
Solvano 2.0 2.0 3.3 4,3 5.0 5.6 6.1 5.6 4.4 3.7 2.2 1.6 45.6
·'
36
Section 495 Conti nued
Ann.
County City Jan Feb Mar Ä!:Jr May Jun Ju Auq Sea 00 Nav Dee Eta
Santa Clara Gilroy 1.3 1.8 3.1 4.1 5.3 5.6 6.1 5.5 4.7 3.4 1.7 1.1 43.6
Los Gatos 1.5 1.8 2.8 3.9 5.0 5.6 6.2 5.5 4J 3.2 1.7 1.1 42.9
Palo Mo 1.5 1.8 2.8 3.8 5.2 5.3 6.2 5.6 5.0 3.2 1.7 1.0 43.0
San Jose 1.5 1.8 3.1 4.1 5.5 5.8 6.5 5.9 5.2 3.3 1.8 1.0 45.3
Santa Cruz Santa Cruz 1.5 1.8 2.6 3.5 4.3 4.4 4.8 4.4 3.8 2.8 1.7 1.2 36.6
Watsonville 1.5 1.8 2.7 3J 4.6 4.5 4.9 4.2 4.0 2.9 1.8 1.2 37.7
Shasta Burney 0.7 1.0 2.1 3.5 4.9 5.9 7.4 6.4 4.4 2.9 0.9 0.6 40.9
Fall River Milts 0.6 1.0 2.1 3.7 5.0 6.1 7.8 6.7 4.6 2.8 0.9 0.5 41.3
Glenbum 0.6 1.0 2.1 3.7 5.0 6.3 7.8 6.7 4.7 2.8 0.9 0.6 42.1
Reddino 1.2 1.4 2.6 4.1 5.6 7.1 8.5 7,3 5.3 3.2 1 4 0.9 48.8
Sierra Downievtlle 0.7 1.01 2.3 3.5 5.0 6.0\ 7.4\ 6.2 ' ~I 2.8\ 0.9\ 0.5\41.3
-./
Sierraville 0.7 1.1 2.2 3.2 4.5 5,9 7.3 6,4 4- 2.6 0.9 0.5 39.6
...J
Siskiyou Happy Camp 0.5 0.9 2.0 3.0 4.3 5.2 6.1 5.3 4.1 2.4 0.9 0.5 35.1
MI. Shasta 0.5 0.9 2.0 3.0 4.5 5.3 6.7 5.7 4.0 2.2 0.7 0.5 36.0
Tulelake 0.5 0.9 2.1 3.4 5.3 - a 7.9 ô.7 4 ' 2.7 0.9 0.5 41.2
:J._ .~
Weed 0.5 0.9 2.0 2.5 4.5 5.3 6.7 5.5 '1 -. 2.0 0.9 0.5 34.9
~.(
Yreka 0.6 0.9 2.1 3.0 4.9 5.8 7.3 6.5 ' - 2.5 0.9 0.5 39.2
-,..)
Solano F airiield 1.1\ 1.7\ 2.8\ 4.0\ 5.5\ ~'~I 7.8 ô.o 4.8\ ~'~j 1.41 0.9145.2
Rio Vista 0.9 1.7 2.8 4.4 5.9 7.9 ~ c; 5,1 1.3 0.7 470
0./ o,~ ..J,¿
Sonoma C!overdaje 1.1 1.4 2.6 3.4 5.0 5.9 6,2 5.6 ¿ - 2.8 1.4 0.7 40.7
.:J
For: Ross i .2 1.4 2.2 3.0 3.7 4,5 4.2 4.3 3.4 2.4 1.2 0.5 3 i.9
Hearldsburg 1.2 1.5 2.4 3.5 5.0 5.9 6.1 5.6 4.5 2.8 1 4 0,7 40.8
Linc:Jln 1.2 1.7 2.8 '4.7 6.1 7.4 8.4 7.3 5.4 3.7 1.9 1.2 51.9
PetaJuma 1.2 1.5 2.8 3.7 4.6 5.6 4.6 5.7 ' - 2.9 1.4 0.9 -q 6
_.:J oJ ~. I
Santa Rosa 1.2 1.7 2.8 3.7 5.0 6.0 6. i 5.9 4,5 2,9 1.5 0.7 42.0
Stanislaus La Grange \ 1.2 1.5 3.1 4.7 6.2 7.7 8.5 7.3 5.3 3.4 1.4 0.7 51.2
Mod esto 0.9 1.4 3.2 4.7 6.4 7.7 8.1 6.8 5.0 3,4 1.4 0.7 49.7
Newman 1.0 1.5 3,2 4,6 6.2 7,1. 8.1 6.7 5.0 ~ , 1.4 0.7 ¿9.3
\ "';.-
Oakdale 1.2 1.5 3.2 4.7 6,2 7.7 8.1 7.1 5.1 3.4 L4 0.7 ::0,,;
Turlcck 0.9 1.5 3.2 4- 6.5 7.7 8.2 7.0 5.1 3.!. 1.4 0.7 502
,/
Sutler Yuba C.ty I 1.3 2.11 2.81 4.41 5.71 7.21 7.1 6,11 4.71 3.21 1.21 0.9146.;- \
Tehama Red BluH 1.2 1.a\ 2.9 4.4 5.9 7.41 8.5\ 7_31 5.4 3.5 1.7 1.0 51.1
Carnine 1.2 1.8 2.9 4.5 6.1 7.3 8.1 7.2 5.3 3.7 1.7 1.1 50.7
Trinity Hay FOI1< 0.5 1.1\ 2.3 3.5\ 4.91 5.91 7.0 6.01 4.5 2.8 0.91 0.7 40.1
Weaverviile 0.6 1.1 2.2 3.3 4.9 5.9 7.3 6.0 4,4 2.7 0.9 0.7 40.0
Tcu(¡mme Groveland 1.1 1.5\ 2.8 4.1 5.7 7.21 7.9 6.6 5.1 3.31 1.4 0.7 47.5
Sonora 1.1 1.5 2.8 4.1 5.8 7.2 7.9 6.7 5.1 3.2 1.4 0.7 47.6
Tulare Alpaugh 0.9 1.7 3.4 4.8 6.6 7.7 8.2 7.3 5.4 3.4 1,4 0.7 51.6
Badger 1.0 1.3 2.7 4.1 6.0 7.3 7.7 7.0 4.8 3.3 1.4 0.7 47.3
Dinuba 1.1 1.5 3.2 4.7 6.2 7.7 8.5 7.3 5.3 3.4 1.4 0.7 51.2
Porterville 1.2 1.8 3.4 4.7 6.6 7.7 8.5 7.3 5.3 3.4 1.4 0.7 52.1
Visalia 1.0 1.8 3.4 5.4 7.0 8.2 8.4 7.2 5.7 3.8 1.7 0.9 54.3
Ventura Oxnard ., 3.7 4.4 4.6
I 2.2 2.5 3.2 5.4 4.8 4.0 3.3 2.4 2.0 42.3
Thousand Oaks 2.2 2.7 3.4 4.5 5,4 5.9 6.7 6.4 5.4 3.9 2.6 2.0 51.0
Ventura 2.2 2.7 3.2 3.8 4.6 4.7 5.5 4.9 4.1 3.4 2.5 2.0 43.5
,,-f--.-
Yolo ¡OaViS 1.0 1.9\ 3.3 5.0 6.4 7.6 8.2 7.1\ 5.4 . ~. 1.8 (:"..... c
...û I." ...;~...)
VVinters . 1.7 1.7 2.9 4.4 5.8 7.1 7.9 6.7 5.3 3.3 1.6 1.0 49.4
Woodland 1.0 1.8 3.2 4.7 6.1 7.7 8.2 7.2 5.4 3.7 1.7 1.0 51.6
Yuba Brownsvdle 1.1 1.41 2.6 4.0 5.7 6.8 7.9 6.8 5.3 3.4 1.5 0.9 47.4
Average 1.4 1.9 3.2 4.6 6.0 6.9 7.6 6.8 5.3 3.6 1.8 1.1 50.2
Max 3.2 4.4 6.7 8.9 11.1 12.4 12.8 11.1 9.1 6.7 4.0 2.7 92.9
Min 0.5 0.7 1.7 2.5 3.7 3.5 3.7 3.7 3.b 2.0 0.7 0.4 27.5