HomeMy WebLinkAboutAgenda Bill 4.C-Memo 03/01/2004`+C
CITY OF PETALUMA, CALIFORNIA
MFIMORANDtJM
Water - Resources, and'Conservation Departm ent, .11 English St., Petaluma, CA 94952
(70.7) 778 -4304 Fax (709) "776 -3635 E -mail: dwrc@ci petalumaxa.us
DATE: February.24, '2004
TO: Mike Moore, Director of Community Development
George White, Assistant Director of Community Develo ment
FROM: Dean Eckerson, PE., Engineering Manager,
SUBJECT: Southgate Subdivision—Recycled Water Recommendations
Department of Water Resources staff reviewed the Southgate development proposed at Frates
Road and South Ely Road -for the potential to conserve the use of potable water, and to offset
potable water use with recycled water. Due to the large number of residential units proposed to
be constructed adjacent to our recycled water pipeline in South Ely Road, we recommend a
recycled water distribution system be constructed with this subdivision to provide recycled water
for park and open space. The use of recycled water for landscape irrigation is necessary to meet
the potable offset requirements adopted by the City in the Urban Water Management Plan 2000.
In addition, we recommend the use of water e fficient plantings and irrigation systems for the
front -yard landscaping.
The following summary and recommendation is offered for your use in completing the staff
report for the project and finalizing the development conditions.
Recycled Water Summary
The City of Petaluma currently operates a water recycling program providing disinfected
secondary effluent form the wastewater treatment plant for irrigation of agricultural lands. This
program allows the City to meet the San Francisco Bay Area Regional Water Quality Control
Board restriction from releasing. wastewater effluent to the Petaluma,River between May 1 St and
October 20
In early 2001, the City adopted the Urban Water Management Plan 2000 prepared by the
Sonoma County Water Agency mandating implementation by 2020 of a water recycling program
to offset 600 acre -feet per year of potable water use with recycled water. The current disinfected
secondary effluent recycling does not meet this potable offset requirement. The City's planned
Water Recycling Facility is currently under design and will produce tertiary recycled water
meeting the State of California's Title 22 requirements for unrestricted use by 2007. In 2001, the
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City completed a recycled water study to identify potential customers and demands in the
northeast portion of the City.
This study identified potential future tertiary water customers and determined the size and
configuration of the backbone distribution pipeline system to convey future tertiary water into
the City's jurisdiction from the existing. oxidation ponds on Lakeville Highway. "Phase, l of this
recycled water pipeline .is under construction and scheduled for completion by'the summer of
2004. Upon completion this pipeline will provide disinfected secondary effluent to the Rooster
Run Golf Course until tertiary water is available.
Recycled Water and. Landscape Recommendations
The proposed Southgate development is located adjacent, to the Phase 1 recycled water, pipeline
in South Ely Boulevard. Accordingly, it is recommended this' development construct" the
necessary off -site and on -site recycled water distribution, system improvements from
distribution main in South Ely Boulevard to provide recycled water for landscape irrigation on
all open space /park parcels.
In addition,, it is :recommended the landscape; irrigation, and grading plans comply with the
,City's Landscape Water Efficiency Standards to promote efficient water use and reduce water
waste. Turf grass should not be allowed for the front -yard landscaping due to, its relatively high
water need.
Attached are the proposed conditions of development and applicable.reference documents to
meet the recycled water <and landscape recommendations on this project. Please call me, at 778 -
4583 if you`have any questions.
DE /dr
Attachments
xc: Mike Ban
Development File
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Water Rec.doc
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SOUTHGATE SUBDIVISION
IZEC)'CLEID WATER,'LANDSCAPE, ANbIRRIGATION CONDITIONS
RECYCLED WAFER
The developer shall be,lrequired construct all on -site and off- -site recycled water facilities
to provide recycled water , Ito the park and open space for landscape irrigation.
Design, operation, and maintenance of the recycled water facilities shall comply with the
City's Recycled Water Rules (copy attached).
LANDSCAPING AND IRRIGATION
The landscape plan, :irrigation plan, and grading plan shall :comply with the City's
Landscape Water Efficiency Standards (copy attached). Prior to the issuance of a building
permit for the project, each of these plans and all supporting documents shall be submitted,
to the City for review and approval. The City shall decide the review and approval
procedure.
2. Planting materials shall be selected and assessed. using the California Department of Water
Resources' "Guide to Estimating Water Needs of Landscape Plantings in California," or
similar guide. Turf grass shall not be allowed it front yards.
The design wafer budget and landscape water requirements shall be established for all
proposed landscape areas and itemized on the Landscape Design Water Budget Statement
(copy attached).
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Water Rec CONDITIONS.doc 2/24/04
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..X CYC .E D WAT . RJRUL E S
SCOPE. These `rules and. rates pertain only to the - on- site.use and distribution of recycled
water.' These rules and rates shall remain in effect unless: superseded by City resolution or
ordinance pertaining to the rate, and use of recycled water. The City retains; full control and
responsibility for operating the Water Recycling Facility and. forpr'oducing recycled water
which meets the requirements of the Regional Water Qulity Control Board and State
Department of Health Services requirements.
2. DEFINITIONS. The meaning; of the terms used in these Rules shall be as follows:
Air -gap, Separation — Referto,Peialuma Municipal Code, Section 15.090.030.
Applicant - Any person, group, firm, partnership; corporation, association, or agency that
applies for recycled water service under the terms of these. Rules. An approved applicant
becomes a user.
Application Rate - The rate at which recycled. water is applie6 to a use area.
Approved Use Area -,A site with well - defined boundaries, designated in a user permit issued
by the City to receive, recycled water for an app_ roved use and acknowledged by any and all
applicable regulatory agencies.
® As -Built Drawings - ' Record drawings that depict the completed recycled water service
facilities as constructed or modified.
Automatic System - Automatic controllers, timers, valves, and associated equipment used to
program irrigation systems for the application of recycled water:.
Backflow - A flow condition caused by a differential in pressure that causes the flow of water
or other liquids, gases, mixtures, or substances into the distributing pipes of a water supply
from any source or sources otherthan an approved water supply source. Backsiphoning is
one cause of backflow., Backpressure is another cause.
City - The City of Petaluma, California.
Cross -Con ection - Refer to Petaluma Municipal Code,. Section 15090.030.
Hose Bib - An outdoor faucet or similar device to which a common garden hose can be
readily attached.
Irrigation. Use - An approved use of recycled water for landscape irrigation as defined for
reclaimed water, under Tittle 22, Division 4, Chapter 3, Article 4: of the California. Code of
Regulations
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Landscape Impoundment - A body of water containing (all orpart) "recycled water which is •
used for aesthetic or irrigation °purposes and which is not intended for public contact or
ingestion.
Non - Potable Water Recycled water and groundwater not meeting Federal, State and local
drinking - water standards.
NPDES Permit - ' National;Pollutant Discharge Elimination System permit granted to , the City
of Petaluma, California, by the CaliforniaRegional"Water Quality Control, Board, San
Francisco Bay Region.
Offsite Facilities - Facilities under the control of the, City_ ,, ,including recycled water pipelines,
reservoirs, valves, 'connections and other appurtenances beginning at the City's Wafer..
Recycling Facility and ending at the point. of connection with the Lessee's facilities.
- Onsite Facilities - Facilities under the control of the Lessee including but limited to
landscape irrigation systems, and beginning at the water service. meter or meters.
Potable Water - Water that conform to the latest Federal, State =and local drinkitigwater
standards.
Quick Coupler Connection - An outdoor piping outlet to which a special piping attachment
can be. added to ;allow a common garden hose attachment to be used.
Reclaimed Water - As defined in Title 22, Division 4, Chapter 3, Environmental Health •of
the California Code' of Regulations (Code) means water that, as a result of treatment. of
domestic /industrial wastewater is, suitable for direct beneficial use or a controlled use that
otherwise' would not.occur; such treatment of wastewater. having been accomplished in
accordance: with the criteria for assurance of reliability, as set forth in the C'od'e.
Recycled 'Water - Substitute term for reclaimed water as defined in Section 130Mof the
California Water Code.
Recycled Water User Permit - A permit issued•by the City,to a recycled water service=
applicant after the satisfactory completion of the service application procedures set forth in..
these Rules. This, permit constitutes a service agreement thatlegally binds the'user to all
conditions in these Rules, and to any and all Regulatory Agency requirements.
Regional'Board The, California Regional Water Quality Control Board S'an.Francisco Bay
Region.
Regulatory Agencies - Those public agencies legally constituted to protect the public health
and- water quality; such as the ,Federal EPA, California Department of Health Services
California Regional Water Quality Control.Board,'Sonoma County Health and
Department of Fish and.Game.
: Shall Means mandatory.
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• Supervisor The Onsite Recycled Water .Supervisor who shall be a qualified person
designated by a - -recycled water user, This person shall be knowledgeable in the construction
and operation of recycled water and,irrigation'Systems and in the appl'ication the Federal,
State and local guidelines, criteria, standards, rules and regulations governing,the use of
recycled water.
Title 17 and Title 22 'Title .l7 and Title 22 of the California Code of'Regulations.
User - Any person,,persons, or firm (includes any public utility, municipality, "or other public
body or institution) issued a recycled water user permit by the City. The user and owner may
be one and the same.
Violation - Noncompliance with any condition or conditions, of these regulations and/or a
user permit by any person, action or occurrence, whether wilfully or by accident..
3. GENERAL PROVISIONS
(a) Administration. Except as otherwise provided herein, the City shall administer,
implement, and enforce the provisions of these Rules. Any powers granted or duties
imposed upon the City may be delegated by the City to persons acting in the beneficial
interest of or in the employ of the City. '
(b) Confidentiality Information and data on a user obtained from,reports, questionnaires,
permit applications, permits, sample data, and monitoring programs and from inspections
shall be available to the public or other governmental agency without restriction unless
the user specifically requests and is able to demonstrate to the satisfaction of the City that
the release of such information would. divulge information processes, or method of
productions entitled to protection as trade secrets of the user.
(c) Protection of `Public health. ' The City reserves the 'right to take. any action with respect
to the operation ofAhe recycled water system and at such time as it deems proper to
safeguard public health. `
(d) ' Liability. The City'assumes no responsibility for the maintenance and operation of any
onsite recycled water system beyond that which it with respect to violations of the
regulatory. agency`regiuirements. `The user assumes all liability' and responsibility of every
other kind to the .end that the City shall be kept whole and blameless at all times. in any
claim resulting from matters involving quantities, quality, time or- occasion of delivery, or
any other phase of the maintenance, operation, and service of the Lessee's onsite
facilities.
(e) Damage to or Facilities. No person shall `enter, break, damage,
destroy, uncover;, deface, or tamper with any temporary or permanent structure,
equipment, or appurtenance which is part of the City's recycled:water, sewerage, or storm
drain - system.
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4. COMMENCEMENT` OF SERVICES
(a) General. Applicant shall connect to the City's recycled�water ,system only after
obtaining ' a permit" to do so `from the City.
(b;) A"p"plication: Applicant shall make an application for a recycled water user permit by
providing sucHnfonnation as the City appropriate to evaluate the request
,:including, but not limited -to:
O Name, address and contact phone .number for:.
1. Applicant
2. J Entity responsible for maintaining park and open space parcels.
3. Supervisor designated. to operate and maintain all on -site recycledwater
distribution facilities.
(ii) Scaled drawing delineating,the subject service area, identifying location and:size of
all service connecting and delineating areas in which recycled watdnservice is to be
specifically excluded.
(iii) Anticipated: use and applicat on.,rate.
5: CONDITIONS OF SERVICE. Applicant shall use or make a connection to the City
recycled water facilities without; first obtaining .a. Recycled Water User Permit.
(a). The City reserves the right to determine the;size of the service line(s), the_service location.
and conditions of backflow ; %assembly(s) for. potable water service:
in accordance herewith, and any and all other appurtenances to the;service -.
(b) The City reserves the right to limit the area of land to be supplied by one service
connection to one ownership. A service connection shall not be iised�to supply ;adj oining
property of a different owner unless approved by the City.
(c) All recycled water use shall be metered, and, all recycled water used- on any: premises
where a,recycled watenmeter s.'installed must, through said meter. User shall be held
responsible.and charged.for all recycled water passing through the meters, unless
otherwise specified.
(d) Limitations of Service
(i) The City shall not be liable for any damage by recycled water or otherwise resulting
from inadequate capacity, defective plumbing, broken or faulty services, .or recycled
water mains; or `an conditions beyond the control of the C>ty. User shall accept such .
conditions of pressure.,, as provided bythe distribution system at the lo.catibn of the
service connection and to .hold the City harmless from all .damage arising., from low
pressure or high pressure conditions, or from interruptions of service.
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(ii) The City .is not responsible for any condition of the recycled water itself or any
substance tha thay be mixed with or be in recycled water as delivered to any user,
except as required by Title 22.
(iii)All recycled water service will be on an interruptible' basis, depending on the quantity
and quality of the recycled water available.
(e) Scheduling.I2eeyeled Water. The City reserves the right to control and schedule the use
of recycled water if, in'the opinion of the City, scheduling is necessary for purposes
including, but not limited to the maintenance of an' ac, ceptable working pressure in the
recycled water system and providing for reasonable safeguards in relation to public
health.
6. SERVICE CONTINUATION. All offsite recycled water facilities and all onsite recycled
water facilities shall be'designed and constructed according to the requirements, conditions,
and standards as adopted and revised by the City, and by this reference are incorporated
herein.
(a) Offsite Recycled Water Services. Operation and surveillance of all of the City's offsite
recycled water system facilities, including, but not limited to recycled water pipelines,
reservoirs, valves connections, supply interties, and other.appurtenances beginning at the
City's water recycling facility and ending at the point of connection with the User's
facilities, shall be under the management and control of the City. No other persons except
® authorized employees of the City shall have any right to enter upon, inspect, operate,
adjust, change, alter, move, or relocate'any portion of the foregoing, or any of the City's
property. If :such should occur, - all charges and penalties shall be applicable and collected.
Such action mayilso be violation of any and all applicable Federal, State, and local
statutes, ordinances regulations, and other requirements and. subject to a service turn -off.
(b) Ofsite Recycled Water Services.
(i) The operation and maintenance of onsite recycled water distribution facilities are the
responsibility of the User.
(ii) The operation and maintenance of all onsite recycled.water system facilities,
including but not limited to landscape irrigation systems, shall be under the
managementof a Supervisor designated by the User. Designated duties of the
Supervisor includeAhe responsibility for the cross- connection control program on the
water user's premises. This Supervisor shall review the installation and revision of
pipelines and equipment to assure that there are no cross - connections.
(iii)The City shall occasionally monitor and inspect the onsite recycled water system, and
for these purposes shall have reasonable access. Where necessary, keys and /or
combinations shall be issued to the City to provide such access.
(iv) The LTs:er shall have the following responsibilities in relation to operation of onsite
facilities:
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(1) To make sure that all operations personnel are trained and familiarized with the
use of recycled water. •
(2) To furnish. their operations personnel with maintenance instructions, irrigation
schedules: as -built drawings to, ensure proper operationin accord_ ance with
the onsite facilities design and these Rules.
(3) To prepare and submit to the City one (1) set of as -built drawings on mylar.
(4) To notify.the City of any and.all updates or p roposed, changes modifications or
additions to the onsite facilities, which changes shall be approved by the City and
shall be designed and constructed according to the requirements,, conditions, and
standards set in these Rules. Changes, modifications or additions must be
submitted to the City.forplan check and approval prior to construction. The
construction shall be 'inspected by the City, and revised as =built draw.irigs and.
controller charts shall be approved by the City.
(5) To operate and control the system in order to prevent direct human consumption
of recycled water and to control _and limit runoff. Operation and control measures
shall prohibit the following:
(a) 'Runoff Conditions - Conditions that directly or indirectly cause a runoff
outside of the approved use area, whether by design, construction practice, or
system operation are strictly prohibited. Sprinkler head alignment shall not,
allow spray to be directed outside, the boundaries of the approved use area. •
(b) Windblown Spray Conditions Conditions that directly or indirectly permit
windblown spray to pass outside of,the. approved use area,, whether by design,
construction practice, or system operations, are strictly prohibited.
(c)Unapproved Uses Use of recycled water for any purposes other than those
explicitly approved in the currently ;effective user permit issued by the City
and without the prior knowledge and approval of the appropriate regulatory .
agencies :is strictly prohibited.
(d) Cross - Connections - Cross- connections as def ned herein: and by Title 17,
resulting from. the, use of recycled water or from the °physical presence of
recycled water service, whether by design, construction practice, or, system
operation, are strictly prohibited. A detected cross- connection will result in an
immediate termination .of both the potable water service and the.recycled
water service until the cross - connection is located and eliminated to the
satisfaction of the. City.
(e) Hose Bibs Use or installation .of hose bibs on any onsite :irrigation system
presently operating; or designated to operate with recycled water, regardless of
the hose bib construction or identification, is strictly prohibited.
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(f) Unprotected Public Facilities - Facilities that may be used by the General
Public including but not limited to, eating surfaces and playground
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equi p ment; and located within the approved use area designated by the user
permit, shall be protected by an .appropriate. separation from contact with
recycled water, whether bywindblown spray or by direct application through
irrigation or other approved use. Lack of such protection, whether by design,
construction' practice, or system operation, is. strictly prohibited.
(g) Unprotected Drinking Fountains - Any and all drinking water facilities located
onsite shall be protected from direct, or windblown recycled water spray.
(h) Fire Hydrants - Use or installation of fire hydrants on any onsite system that is
in current use or is designed to operate with recycled water, regardless of the
fire hydrant construction or identification, is , strictly prohibited.
(i) Ponding - Irrigation with recycled water should be controlled to prevent
ponding and runoff unless approved by the City, otherwise it is strictly
prohibited.
(j) Periods of Operation - The operation of the irrigation system shall be during
periods of minimal use of the approved use area by the general public. Such
periods of operation shall remain within any general period of recycled water
irrigation operation specified by the City. Irrigation should be restricted to
times I when the area has least human contact.
(6) To ensure: that °therecycled water facilities remain in compliance with these
Rules.
(7) To comply with any and all applicable Federal State, and local statutes,
ordinances, regulations, contracts, rules and regulations, and all requirements
prescribed by the City. In the event of violation, all charges and penalties shall be
applied and collected.
(c) , Meter Testing. If a recycled water meter fails to register during any period, or is known
to register inaccurately, the be charged with an average daily consumption at
the same rate shown by the reading of the meter when in use and registering`accurately.
(d) Records. The User shall maintain as -built drawings of the use area showing all
buildings;'domestic,and recycled water facilities, "the sewage collection system, etc.
Drawings shall be updated' as'modifications are made.'The User shall keep a copy of the
drawings on site and present them to the City as needed.
7. PROTECTIVE MEASURES.
(a) General. Recycled °water shall be used in accordance with the standards of treatment and
water quality requirements set forth in the California Code of Regulations, Titles 17 and
22, to protect the public health. Recycled water maybe used for any purpose permitted
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by Federal, State and local regulations provided that all such use is in accordance with .
these Rules and the City's NPDES Permit and provided further that:
(i) The design and construction of the recycled water system shall be'approved by
City.
(ii) Violation of permit conditions may.result in a notice of violation, fines and/or
termination of service.
(b) System;IDesiLn Requirements
(i) All:piping,`valve boxes, valves and outlets shall be marked to differentiate.recycled
water from domestic or other water using purple piping, Pantone #512, or purple
labeling.
(ii) All.recycled water controllers and valves shall be; appropriately tagged to warn the
public,and employees that the water is not safe -for drinking.
(iii)All recycled water valves, outlets, quick couplers, and sprinkler heads shall be of a
type or secured in a,manner that only permits operation by personnel authorized by
the, user.
(iv)Notification shall be provided to inform. the; public that recycled water is being used. •
The notification shall include the'posting of conspicuous signs with proper wording
of sufficient, size to be clearl'yread.
(v) An air -'gap separation device shall be provided at the domestic water service
connection.
(vi)There shall be no connection between the potable water supply and piping containing
recycled water:
(vii) There shall be at least -a 1 7foot horizontal and 1 =foot vertical separation (with the
domestic water above the recycled water pipeline) between. all pipelines_ transporting
recycled water and those - transporting water supplied from the domestic system:.
(c) System Layout. The irrigation system shall be designed to prevent, discharge onto areas
that:are not, approved for use.'The system design shall avoid spray patterns that include
obstructions that tend to concentrate recycled water.. and, produce pondng °and/or runoff,
such as spraying against bridge,abutments.and outlet structures.
(d) „ System Control Devices. The system shall include automatic system control devices
that can be programmed to prevent the ponding and/or runoff of recycled water. These
devices shall *include automatic: controllers, valves and associated equipment. The devices
shall be designed so that, if the current application program is producing any runoff, they
can , be readilyprogrammed on site to prevent such occurrences.
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(e) System Operation.
(i) The User- shall be responsible for the operation and surveillance of onsite recycled
water distribution facilities to avoid cross - connections. Cross- connection between the
potable water system and the recycled water system shall not take place under any
circumstances.
(ii) The User shall maintain the irrigation system properly so as to minimize failures and
to repair broken valves, pipes and sprinklers in-a timely fashion.
(iii)The User shall'prevent people from drinking and minimize the contacting of recycled
water.
(f) System Identification
(i) Each location of a recycled water outlet must be identified and marked with a
conspicuous, label. The label or sign shall be a size no less than 4 inches by 8 inches
and shall include the.follo*nig wording: "TO PROTECT THE ENVIRONMENT,
THIS LANDSCAPE IS IRRIGATED WITHIECYCLED WATER - DO NOT
DRINK." �Signage shall be in Spanish, as well as in English.
(ii) All pipes, valves, and other appurtenances installed above the ground, that are
designed to carry recycled water, shall be painted and maintained a purple color,
Pantone color #512.
(iii) All pipes, valves, and other appurtenances installed below ground, that are designed
to carry recycled water, shall'be colored purple.
ENFORCEMENT. Violation of any provision of these Rules, or the terms and conditions_
of the User's permit, or any applicable Federal, State, City or local statutes, regulations,
guidelines, ordinances,..or other: requirements may be served by the City with a written notice
of non - compliance stating the. nature of the violation and providing a reasonable time limit,
as determined by the City, for the satisfactory correction thereof. This provision is in addition
to, and not by way of 'derogation :of, any other remedies or procedures, available to the City
by law, .regulation, or pursuant to any of the provisions of these Rules. Failure to cease all
violations within the stated time limit may result in revocation of the permit by the City and
termination of recycled water service.
9. RECYCLED WATER RATE. The rate for recycled water service shall be at 80% of the
potable water rate, 'determined as follows:
Recycled Water Rate or Fee = (Potable Water Rate or Fee) x (0.80)
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LANDSCAPE DESIGN WATER BUDGET STATEMENT
Applicant
Address of Project
Project Name
Total Landscaped Area
Date
(# of square feet)
WATER BUDGET:
Maximum water use f6vproject in.Petaluma is based on the formula below. Annual ETo is 39 inches
per year. The ET adjustment factor is 0.80.
39 x 0.71 x x 0.00083 = Cef
(ETo) (Adj. Factor) (Landscape Area, sq.ft.) (Annual Water Budget)
LANDSCAPE WATER REQUIREMENTS:
The estimated applied water use may exceed the Water.Budget. Enter the square foot area for each plant
type. The minimum irrigation efficieney (I.E.) is 0.625.
H drozone Category
Plant Factor
. Landscape Area (sq. ft)
Adjusted Hydrozone
(Plant Factor x Landscape Area)
Turf, High water -using
0.8
Moderate water -using
0.5
Low' & Very Low water -using
0.3
Water Features
0.8
TOTAL ADJUSTED HYDROZONE:
39x x 0.00083 /0 .70 = Ccf
(ETo) (enter Total Adjusted Hydrozone) (I. E.) Calculated Landscape Water Requirement
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CERTIFICATION:
I certify that this landscape plan has been. developed according to the Landscape Water Efficiency
Ordinance of the City of Petaluma and' that this statement represents the landscape water budget and
estimated water requirements of this project..
Name of Landscape Architect or Irrigation Designer Telephone #
Signature (Landscape.Arch'itect,or Irrigation License.#
Name of Property Owner /Developer Telephone
Signature (Property Owner /Developer)
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LANDSCAPE WATER EFFICIENCY STANDARDS CHECK LIST
1. Landscape Design Water Budget.
❑ Landscape Water Use Statement form
2. Landscape Plan
❑ Statement of Design Intent
a. Brief statement of integrated management program
b. Summary of project's on -going water needs and maintenance
❑ Site Map
a. Property lines, str eet names
b. Existing and proposed buildings and structures
c. Landscaped areas
❑ Planting Plan
a. Plants grouped. in hydrozon
b. Total square feet areas of landscape and turf grass.
c. Minimum of inches, of mulch on non -turf and trees in turf
d. Locations' of areas for soil amendments
e. Water features: Calculated water needed to maintain and fill
f. Water features: re- circulating water use only
3. Irrigation Plan
❑ Statement of Design Intent
❑ Backflow Prevention Device(s)
• Irrigation Drawing
a. One microclimaie per irrigation zones
b. Matched precipitation per zone
c. Retracted pop -up operation on all turf sprinklers
d. Pressure, compensation on all bubblers and drip systems
e. Irrigation controllers can match station timing with microclimate needs
Gutter flooding prevention techniques
g. Rain sensing devices
h. Separate irrigation for trees in turf
• Irrigation schedules based on evapotranspiration (ET)
a. plant establishment Water needs
b. mature plant water needs
4. Grading Plan
❑ Grading Plan
a. Finished configurations and elevations of landscaped area
b. Contour lines are drawn when landscaped r areas are > 10 % slope
5. Site inspection
❑ When the irrigation and landscaping design s having been implemented, . please call the
Department of Water Resources and'Conservation at (707) 778 -4507 to arrange for site
inspection. .
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STATE OF r.
WATER CON-SERVATION
N LANDSCAPING ACT
AB
Developed by the City of Petaluma.
:Department of Water Resources
and
Conservation
February 16, 2001
r m r r Drawn By:;
`a o +PE� J so But Smith
�
Department of Water Resources o
1! EnFluh $trees - Petaluma Calitdrna94953 2LF9 C:SC�.�D �.° vN e`� e)" Stannnrus Corruruitae: Cnaimersmi Sienacm e:
707.775430 Paa707776.3635 E fficiency - -
Approved By. Late.
Standards Jule 19th200'? (Rev) i
- Re Number:. - Pace I
Std met. L1500QU 1.06:01 106.
Department of'Waier Res : o �_rees Eaiidscape VVater
1 1 FntEiijh Scree - Petaiuma,cnhfomis 9495:1
707.778.4304 - Fu 707:776.3635 Efficienev
Approved BV: �,
Standa.-ds
mersm Signature
19th2002(R,e-,7)
T A I BLE - OF CONTENTS
I. Purpose
IL Application
111. Definitions
TV. Water Efficient Specifications
1.0 Reqi2irementsforLaiadscapeDesipWaterBudget
1.01 CalculationforPlantWaterRequiremetts
1.02 Landscape Water Requirements
1.03 Irrigation Effici ency
2.0 Requirements fbrLAnd8cape Plan
2.01 Statement ofDesignIntent
1 .02 Site Map
2.03PIantin- Plan
a. ORequirementsforlm-
3.01 StatementoMesign Intent
3.02 Irrida and Schedules
3.03 Itri-ation'Specifications andDetails
3.04U- nif6imT-1um6in Code
3. 05 Waier S ervi'ce Requirements
3.06BackfiowPrevention
3.07Soils-WAt&ReIdtion,s
0.08h
3.09 Irrigation E quipment
4. Requirements for Grading Plan
5'. 0 Requirements for Horticultural S oiis Analvsis Report
V. Review And Approval Requirements
NT Alternative Equipment or Desigli
in
Department of'Waier Res : o �_rees Eaiidscape VVater
1 1 FntEiijh Scree - Petaiuma,cnhfomis 9495:1
707.778.4304 - Fu 707:776.3635 Efficienev
Approved BV: �,
Standa.-ds
mersm Signature
19th2002(R,e-,7)
MAP PENDICES
Appendix A: The Water Use Classification of Landscape Species (WUCOLS) ...................
Appendix B: Landscape Water Use Statement Form ...............................
LAN DSCAPE .= 1,
I. PURPOSE
The purpose, of these standards is to promote =e fficientv�iater use and reduce water waste through ;landscape
and irrigationplanninganddesign ,install "at op, and` long- termlandscapema - agementspecific :toPetaluina's
climate -zone.
All,plants require water. Landscape irrigation water serves the purpose ofinaintaiiiing a.healthy attractive
and functional landscape. A. design water budget will, match plant needs to water supply and maintain
landscape'health and Applicants will develop'a design water budget- per each site -plan submittedfor
review.
The purpose of developing design water budget isfto create,an estimate oflandscape water needs. Estimates
oflandscape water needs are - importantfor, atleast three reasons: watereffic ency,econoniics;and,landscape
quality- Waterefficieticy can be achieved by supplying only the amount ofwiter suffi C-1 'enttomeetplantneeds.
Applying only that amount of water needed by pants and landscapes, and avoiding excess use, can save the
custoinermoney. Lastly, identifying andmeetingplantuiatetneeds' c" anminimizethepotentialfor ,plantinjury
caused by water deficits or excess.
Turf grass can be -included. in a design water budget. Turf grass has relatively hi gh•rvater needs, therefore;
these standards -do not permit turf grass;on slopes and in median strips. Tree planting -in turf grass areas snot
permitted (water supplied to meet turf needs,is often not sufficient for newly planted trees in turf).
These Standards supercede the Model Water Efficient Landscape Ordinance as required by Califomia
Assembly Bill 325 1992' (The Water Conservation an- dIandscaping Act of 1990).
II. APPLICATION
A. The standards applyto new .industrial�,commercial ; and institutional landscaping, and all newmulti-
family common areas and, contractor installed sin gle-family. front yards in new :sub - divisions:.
B. Sinol&- familyresidencesand -multi- fatnilyphvate areas are exempt fromthese standards. However,
all residents are encouraged to follow these standards. ,
C. Seboolyards, parles,. playarouindt, sportsfields, and golf courses are: exernptfromestablishinga:design
water budget. Every other requirement of these standards is applicable, including estimation of
Denartment of Water. Resources
I and'scatie NAI: ter
'I1 Pneiish Street - Petaluma 9492
707.7,76A304 - , ,.Fa5N707.776363``
Approved by:.
Effic eaircy
Sta ciards
1
ith,
tee Chairperson 'Signature
:�
> 00? (Rev
06.03
TSfI(1(ln 1 Ah_0n I
I
4. h
•
irrigation waterrequirements. In addition, turf grass areas of these sites. shah have a landscape
irrigation audit. performed after the installation or renovation;of the- irrigation system.
D. The standards donot;applyto. cemeteries orreQi teredhistorical- sites. However,,landscapemanagers
at thesesites are encouraged to follow efficient irrigation system management practices.
E. The standards apply to any landscaping that is imgated olely by reclaimed (treated, recycled
wastewater) water. Reclaimed . water may contain injurious levels of salts or specific. elements.
When irrigating withreclaimed water, water quality will need to be-monitored and assessed,( Some
upward adjustments inwater estimates maybe needed to reduceplant injurypoiential with low quality
water) .
F. The standards do not:apply to areas devoted to agricultural cultivation.
M. IV. DEFINITIONS OF TERMS
Adiusted ET Factor -An adjustment of 0.75 is applied to evapotranspiration to decrease the amount
of water intensive landscape features such as turfgrass.
Area - Expressed in square feet. Area can be defined as:
i. site area -the total area of site, including build ing footprints, ,roadways, and parking areas
r
ii. hardscapes such as decks and patios, and other non- porous surfaces.
iii. irrigated area - planted areas requiring supplemental irrigation.
•
Bubbler Anirrigationheadthatdeliverswaterto the root zoneby "flooding" the planted area, usually
measured in gallons per minute. Bubblers exhibit a trickle, umbrella, or short stream pattern.
CCF — Hundred cubic feet. The City of Petaluma water customers are billed for water consumption
in units of CCF.
CDIIS Weather Station The California State Department of Water Resources operates
California Irrigation Management Information System (GENIIS) weather stations. CMS weather
station #144 has been installed at the Rooster Run Golf Course in Petaluma. CMS weather stations
collectweather data through sensors and calculate Evapotranspiration data. ET data is available on
the City of Petaluma's web site www.ci.petaluma:caals.
Common areas - Those areas in a residential development maintained by either the developer Ora
homeowner's association.
Conversion factor, (0:00083) = A number that converts the ma,ximum allowance (design
water budget) from inches (in.) pet square foot (sq. ft.) per year to units of one hundred cubic feet
(CCF) per square foot per year. Water is metered and sol6 m' Petaluma in CCF units. The conversion
is calculated as follows:
(43..6 CCF /43,560 sq ft )/12 inches = 0.00083
Department of Water ; Resourees
I I En_eiish Street ' Petaiuma,Califorma 94952
707:776.4304 - Fax 707.776`3635
'Landscape Water
Effacieeacy
Standards
Srni&
.oaimittee Chairperson Signature:
WK .
)tla 12002 (Rev)
Page
et.LIS0000'06.04 (
.1 106.0A
Where 435:6 CCF = 1 acre foot
43,560°sq.fL.= one acre
12 inches = one foot
Design Water Budget fdV*B) - For design purposes the upper irnit of annual water use ,for the
established landscaped area supphed.through City water meters.
Effective ` PreeWitation The portion of total precipitation used by plants in the landscape:
Precipitation is not a reliable.source of water and,has,not -been used in calculating'landscape water'
requirernents•mi Petaluma's landscape standards.
ET (Evapotranspiration) . - The quantity of water evaporated from adjacent soil, surfaces and
transpiredbyplarits during a specific. time, expressedininches.per day,ihanth, oryear. Forpurposes
of these standards, the annual ET for Petaluma -is 39 inches. ET can be converted to gallons or units
of 100 cubic feet (ccf).
,GPM - Gallons per minute
Hvdrozone A.portion of the landscaped area; thathas plants with similar water needs;and are in
asiinilarmicroclimate. A_hydrozonernaybenon- irrigated or, served by one ormore ,irrigati'onvalves.
For example, a naturalized area planted with native vegetation that will not need supplemental
irrigation once established as anon- irrigated hydrozone.
.1rrigation.Efficiency A measurement of-the amount of water beneficially used by plants divided
by the:amount'of water', applied. Irrigation efficiency is derived from estimates of irrigatiot system
design efficiency and - management practices..,
Irrigation Zone -,Same as irrigation circuit. An' rigation distribution line and associated application
devices controlled by one valve.
Landscape Coefficient Method — Describes a method of estimating irrigation needs of landscape.
plantings .in .California. It M intended as a guide: for landscape professionals. LClvl'is derived from
.analysis o f plant species, planting;:density, and:rn`icroclimate which, when comparedto ET, results in
an estimate df the amount of water required to maintain a planted;area.
Landscape 'Zone — (see Hydrozone) A portion of the.landscaped area havimg similar'microcli hate
and soil conditions and plants with similar water needs that are served by one or several valves with
a similar type of irrigation.
Local Annua'I.Mean PreciT i"tation The, average, amount of rain 4n:_inches per year is:based,on an
average of annual rainfall over a 30. -year period. The 30 -year average for Petaluma was obtained
from California Department of Water Resources and California Polytechnic San,Liiis Obispo. The
local annual mean precipitation for Petaluma. is;24.8 inches per year.
Plant Water.Reguirement -.An estimate of tl e.amount of water regiziredto maintain an acceptable
degree of health and vigor in the planting or group of plants irrigated by.one valve.
De artmeni of Water Resources, ,y 4
31 Enelisli ;Street .- Petaluma Califomia94952 Eandscame VN `aL--r
- 707:776.4304 Fax 707.776 :3635 �1C1e3mC�%
_ Approved By 9.1.
Standards
uruwn nv.
Butch Smith
Standards U=Tunee Charmersen. $ignaturc: -
Dam
June 19th20021(Rev)
-- Pape:..__..
0.106. 10&05
t ,
Precipitation Rate The depth of water applied to a
ven area, usually measured in inches per hour.
• Rain Shut= OffDevice -A device'wiredto the automaticcontrollerthat shuts offthe- irrigation system
When it rails.
Sa. Ft . Square foot.
Turf — A surface layer of eatth`containing tnowed grass with its roots.
WUCOLS Initiated and supported by the California Department of Water Resources, the Water
Use Classification of Landscape Species (V `UCOLS) is a guide to the water needs of landscape
plants. The Cityof Petaluma'falls into WUCOLS region; #1 described as north central and coastal.
Plants are listed by'botanical name and ranked in hydrozones as high, moderate or low (very low)
waterrequirements to the waterneeds of landscape plants and divides plants into water use categories
(see Appendix '1).
V. WATEREP'Y+'ICIENTSPECMCATIONS
1.0 Requirements for Preparing a Landscape Design Water Budget
1.01 Calculate Design Water Budaef
The design Water Budget (dWB) is the amount of water that a project is allotted based on the
size of the landscape area. A design Water Budget will be established for each site plan
submitted for review:
dWB ET'x Adjusted ET.Factor °x (LA) x.00083
dWB = 39"x 0.75 x (LA) x 0.00083
Where: dWB = Design Water Budget in CCF
ET Annual Reference Evapotranspiration = 39 inches
0.75 = ET adjustment factor
LA = Landscaped area in sq. ft.
0.00083 = Conversion factor into CCF
Example for a one -acre site:
dWB. = 39" x°0.75 x 43560'x 0.00053
dWB = 1,057 CCF annual water allowance
The dVVB will be itemized on a Landscape Water Use Statement Form provided by the
City. See Appendix 2 for a sample form (being developed).
Note: For the purposes of these standards the annual. ET for Petaluma is 39 per year, It
is: expected that`ET data will be used `for irrigation management after plant installation. e.g.
�' OF-PETAAF,UMI I Drawn h�
Department of Water Resou rces' + Butch Smith
:t andsc ape Water Stan`aaras Cormtvttee Chairperson Signature:
I I Bndhsh Street - Petaluma Califomia 9495?
_ 707.77814304 -- Fa,. 707.776.3635 _
Approved B} : IDate:
Standards !July 19th200. (Rev) I -
File,Numoer - Yaee. L, ,
IStd:Det LIS0000 106.00 1:00.06 LA
from CMS weather station' #14A located at,the :Rooster Run Golf Course in Petaluma, or
other site - specific, electronically monitored ET calculation system.
1.02 Calculate L andscane Water Requirements '(LVVR)
The landscape water requirements will be estimated based on a;review of the .landscape plans and the
following formula. The LWR will be itemized on a Landscape Water Use statement, form provided by
the City.
LWR-= ET x (landscnearea for each hvdi•ozone' ,: plant.factorYx 0.00083
ITrigationEfficiency
Water Use Classification: of Landscape Species (WLJCOLS)
The water requirements of.landscape plants are documented: m the: WUCOLS guide to the
water needs of landscape plants. The City, of Petaluma falls into WUCOLS region #1
described as north,central and coastal. Plan ts 'are listed by botanical name and ranked in
hydrozones as -high, moderate ovlow (very low) water requirements. The following plant
factors are used for each, plant water requirement.
Plant factor Type of plants
0.8 = Turf (cool season) and high water -using plants
0.5 = Moderate water-using plants
0.3 = Low and very low water -using plants
0.8 = Water features
1.03 Irritation- Efficieney
Irrigation efficiencyisthe .portionofthe.i rigationwater that isbeneficiall 'used tosati"sfy the waterneeds
of the plants compared to the total irrigation applied. Included in the calculation are fosses that occur due
to errors,, sprinkler. overthrow *poor sprinkler distribution uniformity, and brolcen
or lealang sprinkler systems. The'irrigation efficiency, s'set at the industry standard of an acceptable
level of 70, %.
2.0 Requirements for Preparing a Landscape. Plan
TheLandsc ap eArchitect, or qualified designerresponsible;for design ofthe landscape areas;. shouldseek
,.
to design, a,resource efficient -landscape that includes, at,minimum, observance. of desi�an.waterbudget,
soil analysis and waterwaste ordinance.
The Landscape Contractor orqualifiedbuiiderresRonsible for the construction and /ormaintenance ofthe
landscape areas, should seelc to provide a high standard of construction. This should,include an:efficient
water use to establish and maintain the landscape; observances of the City's water waste ordinance, the
California Landscape Contractor's Association landscape;standards -arid the UnifornPlurnbing `Code:
V Tt
Department of VVater Resources
1l Enehsh,Stree, Pemlurtu California 94952
E'ffictieaacy
Standards
z
'Coamnnee: Cnaimerson' S mmum
19th 2002 (Reu -j - -
)et T ISOQOQ 1 106:07
2.01 Statement of Design Intent
Eachiandscapeplan_ submittedforreview shall include aStatementofDe'signlitent. This statement shall
show-how sound water management will be'incorporated and consist of:
1. A brief statement of the designer's use of an: integrated management proIgram water, irrigation
system; fertilization andpestrnanag ement)thatoptimizesplanthealth, resource efficiency and, therefore,
cost - effectiveness for the site; ' and
2. A summary of the on -going water needs and long range maintenance of the, proj ect.
2.02 Sik Map
A site niap shall reflect the following:
1. Property lines and street names; and
2. Existing'andproposl dbuildings structures, retaining walls, fences, utilities, paved areas, and other site
improvements including elevation, if applicable; and
3. Landscaped areas; and
4. Location of soil test(s) and soil percolation test(s) areas on base'plan; and
5. Maximum slope ratios.(both cut andfill) shouldbe not more than, threefeethorizontalto one footvertical
unless erosion control meas'izes are specified.
2.03 Planting Plan
The planting plan shall.be drawn; on project base sheets at a scale that accurately and clearly identifies:
1. Location of allproposed plant materials (trees, shrubs, ground cover, turf,. and other vegetation) and a
legend labeled' by botanical name, common name, container size, spacing, and quantities of each group
of plants indicated and
2. Location, size and species of existing trees and plant materials to' be removed or retained; and
3. All hydrozones measured per sq. ft. and clearly labeled; and
4. Locate pools, ponds, water :features; fences and and
5. Locate existing natural features, but not limited to rock outcroppings, water bodies; and
6. A calculation of; the:
Total landscaped area in sq. ft.
Total turf grass area in sq. ft.; and
7. Prepare specifications fortree; stalang, soil preparation, and'other applicable planting workandinstallation
detail; and
8. Provide for a minimum of 3 inches of mulch to be added in.non -turf areas to soil surface after planting
except for very low'groundcove'r.type plants and around base of trees; and
9. Provide amimmum of l inch ofmulchtobe added to areas;planted.with anon -turf ground cover (such
as around base of trees and very low groundcover types plants);,
10. Visqueen, sheet plastic, andother, non - porous material shall notbe placed underthe mulch. Porousweed-
barrier fabrics are acceptable;, and
11. Locate proposed site areas for soil amendments; and
12. Plant selection and-grouping:
§ Any plants may be used in the landscape, provided the total metered water use does not
exceed the design water 'budget(DWB) -and that the plants,meetthe specifications set forth
intbeWUCOLSGuide. The design WaterBudgetwillnoi allow for 100 %o use ofh ghwater
plant materials or water features; and
Plants shallbe selectedbased upon their adaptabilityto the climatic, !(T'eolbgic ,andtopographic
conditions of the site. Protection and preservation of native species and natural areas is
encouraged; and
ATV dJFPFTAT,IJPr1P
Department of VW ater R ater Smith
I7 English Sneer - Petaluma Califomta 94952'
aindscape Water Standards:Commiaee Chairperson Sienature: n.
. �, • �
70 -Fag 707.776.363 _ E ffi ci ency Late: - - - - - -
Approved BS' - J
Stall arils July 19tiz?002(Rev)
N f File Number. - -. _. _ _ Page:......_
_. Std _ 106.08
g-simi arwateruse, shall be oupedt
Plants havinI. ' *1 th erindistinct
ooe liydrozones;arid
'gr
Tree's sho.uldnot , be,pIanted in rurf,:or, trees.planted inturf sho,uldbe surroundedby amulched
area of " a diamete equal to the diameter-of the'proj'ecte drip line; and
§ If new turf'(and associated irrigation) is installed around l.es.t-ab,ii,§hed, trees; . trees should be
surrounded'bya. mulchedarea of a diameter equal to lie of the projected median-
life,ctown drip line;
§ The plant establishment period is considered to be 12 months: for'thea of these
- standards. - Landscapes may require inbreirrigation than the DWE during the . -first,12 months
after planting; and
13.. Water Features:
Waterneededto fill and maintain leVelsm',water features shall be calculated in cubic feet per
second (CCF), and "included as'part of the. mLxinium.landscapewmiter alloWance;, and
§ Fountains or othertype& of decorative water, bodies where water , isz,sprayed , into the air are
discouraged. "Misting" will not be allowed; and
Any water featureTsubmitted for teview, shad , bedesigned to minimize evaporation; and
§ Re-qirculating water shall be used for any water feature; and
§ Use of reclaimed wafer for fountains and water features is encouraged and
Refilling of all fountains and/or other type of decorative waferbodies"Withp6table watermay
`be:prohibifed during a City - Council- declared water emergency
3.0 Reqifirements f6r Preparimg an. irrigation Plan.
The Irrigation:Desigter, responsible for design of the iM`grated.lands(:#e areas, should design an
to design
efficient irrigationplan based on the design water buderet, approach for each City water meter service. All
irrigation systems shall be,desigiiedfo avoi drai-nage,.over-spray, or othersi conditions
where water flows onto - adj acent - property, walks, roadways, or structures
3.61 Statement of Design intent.
E a htigationplan;submitted shall include, a Statement of Irrigation Design intent.'This statement shall
describe the im' t si
gation sys em andhow the, system conforms to the City's irri gation4e i gn requir6ments.
2
0
'D.epa
3.02, Irri-a Drawing. Schedules and Details
Drawings :shall'b6 thb.same scale as' the Iatidsca0e pla4fin:g plan and shall ncurately and clearlyidentify:
Locatibn.and size of the landscape water, meter; and
Min!irniiin static Dressure::at the point of connection. The nominal system static pressure for the City's
water service Area is available frbinthe. Department ,of Water Resources and-, Conservation at (707) 778-
4392-and
Location, type, and size of all components ofthe system; including electronic
Ationsyst ; point of connection, in cludi
controllers, main lateral lines, valves, application devides,raih shut off sensors, flow w I sen I sors, soil moisture
sensors; booster,pumps, and back-flow ptevention.6eyices; and
Station/zonenumber, valve size, , perm . inute (GPM) sprinkler p rate, and
ac r
Per atin-pressure for h i — nga ionzone; and
Spot elevations used in malting the gradincr• plan; and
TW6.1 M'Lyationschedules for eachirrigation schedule shallbebase6onPetal s; historic
ET for .simentpe second,sd hedule based on mature plant water, needs.
=OFTEXALUMIA Drawn By
mient -- 6 - T Watei�, Resources
t Butch Smith,
Eandscape Water Stadaras Conwriiftee cifairpqrs& Sieiiiiiur-
ffish,Street, - llct�jiima�'Caljfomia 94952
707:77& 4301 - F= 707.776:3635 F-ffxeienq37-.
A�Pprm d Dam
stalaoialrd& 3uly 19th20,O-2`(Re0
Fil- Nilmocr�'
106.09
J
3.03 Irr-iaation Specifications and Details
Specifications shall,prescrib'e quality of materials, standards of workmanship, expected results, and
guarantees and include details as required.
3.04 Uniform Plumbing Code
Specification p for irrigation systems shall ensure that allrequirements ofthe adopted unfied plumbing .code
are met.
3.05 Water Service Requirements
A separate water meter shall ,be installed to irrigate each approved landscape. This meter shall be
designated as an irrigation.account. .
3.06 Backflow Prevention
The irrigation system shall be separated from the City's water supply by a backnow prevention device
or devices approved bythe City Department of Water Resources and Conservation office. For a list of
approved devices coritact,the Department of Water Resources and Conservation (707) 778 -4436.
3.07 Soil -Water Relations
Soil types and infiltrationrates shall be considered when designing irrigation systems. Irrigation equipment
shall be used to closely match_ application rates to infiltration rates (Appendix - Soils Infiltration Rate
Chart).
3.08 Irrigation Zones
Irrigation zones -shall have thefollowing 'characteristics:
1. All plants shall have „similar water requirements (hydrozones); and
2. Irrigation zones shall encompass only one_rnicroclimate; and
3. All application devices shall have matched precipitation and even distribution uniformity.
3.09 Irrigation Equipment
Irrigation system componentsshall be selected on the basis that tneyare appropriate for the task. Criteria
shall include water efficiency,,-performance, ease of maintenance, and public safety.
1. Sprinklers -All sprinklers forturf(niicrosprays, sprayheads, rotors, etc Jshallhave spring retracted pop-
up operation with flexible connections to .piping. Sprinkers shall be selected and spaced for head -to -head
coverageandmaximum ; distributionuniformity. No overhead sprinkler irrigation systems shall be installed
in areas less than eight (8' -0 ") wide; and
2. -Bubblers - Allbubblers shall bepressure compensating. Bubblers exceeding 1/3 gallons perminute (gpm)
shall be used only in planting basins with permanent basin walls to prevent runoff (i.e., tree wells in
hardscape areas, planters, containers, etc,); and
3. Pressure =Compensated Drip Systems - All drip systems shall be pressure compensating and designed to
provide water. uniformly to the area of a mature rootzone;' and
4. IrrigatiomControllers - Electronic controllers shall be requiredfor all projects. They shall be capable of
mana ging ,all aspects ofthe.iirigation system design; and
5. Minimum controller requirements - Controllers shall have precise individual station timing; runtime
capabilities for extremes in precipitation rates; at least one pro gram for each hydrozone and micro climate;
sufficient multiple cycles to avoid runoff extended day calendar for deep- rootedplants; and, power failure
backup for all programs; and
..i i. �pi3 T ��
OI r. Butch Smith
Department of Water Resources �r
'LrndScave 1 7 N I a t er Standards Committee Chai Sigcatcre.
1! Eneiish Street - Petaluma Califomta'.9445 2
707.778.4304. Fa..707.7763635 ll✓ffa�iell �.,� y
e,ppmved. By 3 Late: -
Standards March 5th 2002 (Rev)
_ .Fim Ncmcer I Palm:
Std_Det;LIS0gOQ10o 10 106.10
6. Anti -Drain Valves -The irnaation: system shall be designed toprevent gravitydrainage.of water througn
application devices and
7. Ra.inSensingDevices - Irrigationsystemsshallbeequippedwithrainsensingdevicesto 'preventirriga -ion
during rainy, weather. Soil moisture sensors shall not °;be used as rain,sensing devices; and
8. Tree Irrigation - Trees in turf areas shall be,placed m' a separate hydrozone, segregated.. from all circuits
and served by separate valves.
oFImPTFALTjMA 1 Lrawn by: j
Butch Smitb
Department of Water Resources � - o
t�`[a�1dSC[a. 1 �� a.te&" - Standards Cottmtittee�Chaimerson,atgnatm:
't Hassett:Street Petatutna California 94952 '� ..
707,77g.4304 - Fim 707.778.4365
APProved' By' E+�gcae.$�e4% Daze:
t .
S$ a a S July 19th22002 (Re�v).
File Numoer:
- Std:Det.LIS00001U6_II "' "I' l0o.i1
4.0 Requirements for Preparing a Grading Plan
Grading designplans satisfvine th6 following conditions shall be submitted withthe documents for landscape
review:
1. A grading design plan shall be drawn on projectbase sheets on the same scale as the landscape
plantingplan. It should be separate from, but use the same format as, the landscapeplantingplan;
and
2. The grading,design plan shall_ indicate finished configurations and elevations of the landscaped
area, including theheight ofgradedslopes, drainage patterns, pad elevations, and finish grade; and
I Where landscaped areas exceed 10 percent slope, contour lines and spot elevations as necessary
for the proposed finished grade; and
4. Where applicable, provide specifications for stockpiling and reapplying site topsoil or' mported
topsoil; and
5. The grading design
plan shall indicate soils test and soil percolation tests location(s).
6. The, grading design plan agrees with soils report; and
7. Slopes,.-both cutand f shouldnotbe steeper thdttwo toL Slopes should not be constructed so
irrigation water endangers or disturbs adjomingproperty; and
8. Temporary mulching;; seeding, or other suitable erosion control stabilization measures shouldbe
used to protect exposed critical areas fromsurfacerunoff during construction. An erosion control
plan i s'requred for. allgrading performed between October 1 and the following April 15 (rainy
season). Said plan shall be designedin accordance with the City'ofPetaluma Grading and Erosion
Control, Ordinance 1576; and
9. Where drainageswales are used to divert surface waters, they should be vegetated or otherwise
protected from scour.
5.0 Requirements ;.for'')Horticultural Soils Analysis Report
Soil chemistry analysis orhorticultural suitability analysis:
1. For projects with a landscaped area greater than 44,000 square feet; and
2. Will be required from a laboratory, specializing in landscape soils (see Appendix 4 for laboratories -
forthcoming); and
3. Shall be made for approved projects after rough grading is completed; and
4. If soil is imported for use in the landscaped area, an analysis shall:be;submitted from each different source
of origin of that All material. Samples will be selected for analysis from each different soil type area of
the project; and
5. Final inspections of the project will not be completed without receipt of the soils test report; and
6. Soil will be amended according., to the soil test report recommendations.
V. REVIEW AND APPROVAL REQLURENYENTS
NOTE: The Cite of Petaluma shall decide the Review and Approval Procedure.
Prior to issuance of a building permit for aproj ect, or as otherwise specified in the planning approval
for the project, all - the above documents shall be submitted for review and approval by the (see above
Note) .
CrrYOFPETALUMA Lawn by �
Department of Water Resources g� �Butcii`Smifh I
I l English Street - Feralum m
a.Caliiota 9495? r `�9.ndsc^. ape VC tte Standards Committee Chairperson Signature: 41 1
707:778.4304 . Fax 707.776:3635 ev
approved by: 8 Date:
Sgandaa - ds July 19th2002 (Rev)
'rue rvumder„ .. ..
Std.Det I IS0000 106.12 0 6.1
VI. ALTF,RNAT VE EQriJIPNMNT ORIDESIGN
The City will consider alternative methodologies for calculating plant water needs as long as the
methodology has been endorsed andacceptedby appropriate:academic andprdfessional organizations.
.. - Drawn by:
=',O . F , PETALLTMA IButcn Smifn
Department of Water Resources` .I
11 EnelL6,Strea - Petaluma Ujifomin 9495? .�::.��.'��lS.ca D e �`, �' e ` I,Scandards Connnit[ee.:Ctiaimerson Signature: a.
- 707:7,78 ?4304 Fp,:707.776.363i 1
Efficaencv
Approved: by: - Late:
Starida r;ds July 19th2,002 (Rev..)
Fdc Number Paee - ..
S "td Dei.L1S000C.1�0b 1� 106:1 F.