HomeMy WebLinkAboutResolution 2008-021 N.C.S. 01/28/2008Resolution No. 2008-021 N.C.S.
of the City of Petaluma, California
ADOPTING THE WATER CONSERVATION PLAN
WHEREAS, the City of Petaluma recognizes that water is an essential and limited
resource; and,
WHEREAS, the City of Petaluma's water conservation program has historically been
designed to improve the water use efficiency of its customers; and,
WHEREAS, as a signatory to the Memorandum of Understanding (MOU) Regarding
Urban Water Conservation in California as coordinated by the California Urban Water
Conservation Council (CUWCC), the City has been incorporating Best Management Practices
(BMPs); and,
WHEREAS, the City of Petaluma began the water conservation program by contracting
the Sonoma County Water Agency for coordination and implementation; and,
WHEREAS, the City of Petaluma hired a Water Conservation Coordinator in 2006 and
began to expand the program beyond the required BMPs; and,
WHEREAS, the Water Demand and Supply Analysis developed in support of the 2025
General Plan recommended a water conservation program that met the requirements of water
offset and was cost effective, the water conservation measures were basically a continuation of
the CUWCC BMPs. The City Council directed a study considering the entire breadth of water
conservation measures, not strictly those recognized by the CUWCC, with the caveat that any
measure selected must be feasible, cost effective, and attainable; and,
WHEREAS, the Water Conservation Plan attached to and made a part of this resolution
as Attachment A (Executive Summary and full copy in the City Manager's office) has been
developed to supply 495 MG/Year and is comprised of 19 water conservation measures that are
feasible and attainable by the City; and,
WHEREAS, the City Council finds that adoption of this resolution is exempt from the
California Environmental Quality Act ("CEQA"), pursuant to Section 15061(b)(3) of the CEQA
guidelines (Title 14, Chapter 3 of the California Code of Regulations) because there is no
possibility that the activity may have a significant effect on the environment.
NOW, THEREFORE, BE IT RESOLVED, by the City Council of the City of
Petaluma as follows:
1. The above recitals are true and correct and hereby declared to be findings of the City
Council of the City of Petaluma.
The Water Conservation Plan attached to and made a part of this resolution as
Attachment A (Executive Summary attached and full copy in the City Manager's
office) is hereby approved and adopted.
Resolution No. 2008-021 N.C.S. Page 1
The Director of the Department of Water Resources and Conservation ("Director") is
authorized and directed to implement the City's Water Conservation Plan and the
Director of Water Resources and Conservation is directed to monitor water saved and
return to the City Council from time to time with recommendations for updates to the
Water Conservation Plan to ensure that water supply needs are met. This Resolution
shall become effective immediately and the Director is authorized and directed to
commence implementation of the Water Conservation Plan by developing the Water
Conservation Plan Ordinance and bring it back for City Council action as soon as
feasible.
4. All portions of this Resolution are severable. Should any individual component of
this Resolution be adjudged to be invalid and unenforceable by a body of competent
jurisdiction, then the remaining Resolution portions shall be and continue in full force
and effect, except as to those Resolution portions that have been adjudged invalid.
The City Council of the City of Petaluma hereby declares that it would have adopted
this Resolution and each section, subsection, clause, sentence, phrase and other
portion hereof, irrespective of the fact that one or more section subsection, clause
sentence, phrase or other portion may be held invalid or unconstitutional.
Under the power and authority conferred upon this Council by the Charter of said City.
REFERENCE: I hereby certify the foregoing Resolution was introduced and adopted by the E proved as to
Council of the City of Petaluma at a Regular meeting on the 28`h day of January, fog
2008, by the following vote: n y
City
AYES: Barrett, Freitas, Harris, Nau, O'Brien, Vice Mayor Rabbitt, Mayor Torliatt
NOES:
None
ABSENT:
None
ABSTAIN:
None
ATTEST:
City Clerk
Resolution No. 2008-021 N.C.S. Page 2
ATTACHMENT A
SECTION ONE
EXECUTIVE SUMMARY
Introduction
The City of Petaluma's City Council approved funding to develop a Water Conservation Plan. The
intent of the study was to evaluate and recommend the most cost effective water conservation
plan based on an 80 year present worth, comprised of water conservation measures that are
feasible, cost effective, and implementable by the City. The goal of the plan was to further
implement water conservation beyond that recommended under the City's Water Demand and
Supply Analysis conducted in June 2006.
The City of Petaluma's current water conservation program provides a steady amount of water
savings, but future additional savings provided by the program will start to diminish as the
program reaches saturation. The Petaluma City Council wishes to continue the efforts of water
conservation within the City of Petaluma to achieve further water conservation savings by
implementing the next level of water conservation measures. All water conservation efforts to
date have been factored into the work.
Water conservation is a key element for the City of Petaluma to meet future potable water
demands. During the potable water supply analysis conducted under the City's Water Demand
and Supply Analysis, additional water supply needs for the City of Petaluma to meet the potable
water demand projections were quantified and a least -cost, phased program to meet those needs
was developed. Water supply sources included both potable water supply and offset sources.
These sources included SCWA water, recycled water, water conservation, and groundwater.
To develop the Water Conservation Plan, the project team was hand selected based on their
unique skills and expertise in the area of water conservation. The project team consisted of City
staff from the Department of Water Resources and Conservation, Department of Community
Development, and Department of Parks and Recreation; landscape and irrigation experts, water
conservation experts, the Department of Water Resources and Conservations funding consultant,
and consultants with extensive knowledge of the City's water system and demand and supply
needs. The project team is shown in Figure 1-1.
Water Conservation Plan Development
Review of Pertinent Information
Upon commencement of the Water Conservation Plan study, pertinent background materials
were gathered and reviewed by the project team. These items included materials directly related
to the City of Petaluma and independent materials related to water conservation.
In addition to reviewing pertinent background materials on water conservation, ten water
providers were surveyed about their water conservation programs and efforts. The project team
developed the list of agencies to be surveyed based on similar climate, water supply challenges,
and their innovative water conservation programs.
1/17/2008
1-1
#5320
Resolution No. 2008-021 N.C.S. Page 3
FIGURE 1-1
WATER CONSERVATION TEAM
ORGANIZATIONAL CHART
MARGARET ORR
Engineering Manager
DANA HUNT
Project Manager
GARY DODSON
MICHAEL MOORE
Principal -in -Charge
GEORGE WHITE
MAY ZHAO
IRENE BORBA
Project Engineer
MICHAEL BAN
Director
DAVID IRIBARNE
Water Conservation
Coordinator
DEAN ECKERSON
Engineering Manager
STEVE SIMMONS
Utility Manager
GABE LANUSSE
City of Petaluma- Parks &
Recreation
RALPH ALEXANDER
MICHAEL COOK
Ralph Alexander & Assoc.
BILL MADDAUS TOM GAFFNEY
Maddaus Water Management Bartle Wells Associates
EDWIN (NED) ORRETT
Resource Performance Partners
City of Petaluma Water Use Characteristics
Prior to development of potential water conservation measures for inclusion into the City of
Petaluma's Water Conservation Plan, it was essential that the project team members have an
understanding of the City's existing and future potable water demands and water use characteristics.
The distribution of potable water demands to existing and future customer sectors and the final
buildout water distribution among customer sectors were developed. In addition, existing and future
potable water demands were categorized into indoor and outdoor uses.
Water Conservation Plan Goal
The establishment of a water savings goal for the Water Conservation Plan was based on the amount
of additional potable water required to meet Buildout (Year 2025) demands, the confidence that the
Resolution No. 2008-021 N.C.S.
1 /17/2008
1-2
#5320
Page 4
recommended supply sources outlined in the Water Supply and Demand Analysis can meet the
projected buildout demand, and the ability of a water conservation program to achieve the goal
established.
The offset goal established for the Water Conservation Plan was 495 MG/Year by 2025 (Buildout).
Although the annual amount of potable water that was established for offset via water conservation
at Buildout (2025) under the Water Demand and Supply Analysis Project was 254.5 MG/Year, the
goal established under the Water Conservation Plan by the project team exceeded this value. The
goal was established to eliminate the need to use City -owned groundwater wells for potable water
supply (the Water Demand and Supply Analysis Report determined groundwater would be needed
during the 4 summer months starting in 2024 at a rate of 60.75 million gallons per year and to satisfy
0.5 mgd of average day maximum day demand) and maintain groundwater as a reserve for
emergency/backup use, and to allow for a 25 percent safety factor on the water conservation and
recycled water offset requirements established under the Water Demand and Supply Analysis
Report. Although the recommended water conservation program outlined iri the Water Demand and
Supply Analysis Report met the requirements of water offset and was cost effective, the water
conservation measures were basically a continuation of the California Urban Water Conservation
Council's (CUWCC) Best Management Practices (BMPs). For the Water Conservation Plan, the City
considered the entire breadth of water conservation measures, not strictly those recognized by the
CUWCC, with the caveat that any measure selected must be feasible, cost effective, and attainable.
Development of Potential Water Conservation Measures
The project team developed 202 potential water conservation measures for inclusion into the City's
final Water Conservation Plan. The potential water conservation measures developed were divided
into two distinct categories; namely, measures that could be implemented "on -site" at future new
development sites and measures that could be implemented "off -site" at existing sites. The measures
were then organized by indoor versus outdoor water savings and placed into applicable customer
sectors. The potential measures included programs, ordinances and controls, public outreach and
billing items.
Development of Evaluation Criteria
Once the preliminary list of potential on -site and off -site water conservation measures was
developed, the project team chose evaluation criteria which would be used to screen the potential
conservation measures, determined the importance of each criterion, and identified any potential
fatal flaws that would eliminate potential water conservation measures from further consideration to
ensure a feasible and manageable program. Upon discussion and analysis of the proposed criteria by
the project team, the team grouped related evaluation criteria and determined weights for the criteria
and corresponding fatal flaws that would be used to select the most feasible and suitable measures.
Evaluation of Potential Water Conservation Measures
Once evaluation criteria were identified, potential water conservation measures were evaluated and
a shortlist of 112 measures was compiled for further evaluation. The initial screening process used
the fatal flaws to eliminate potential measures.
The next step of the Water Conservation Plan process was to further reduce the number of potential
water conservation measures and place the remaining measures into a water conservation program
for further evaluation. Since many water conservation measures reduce the same water use (i.e. turf
Resolution No. 2008-021 N.C.S.
1 /17/2008
1-3
#5320
Page 5
Emits, proper landscape materials, and ET controllers all reduce irrigation use), each group of
potential measures must be evaluated together in order to determine the net water reduction and the
program's overall cost-effectiveness. A highly sophisticated computer model known as the Least
Cost Planning Decision Support System (DSS) was used to complete this task. The model coordinates
water savings between measures and does not "double count" water savings thus allowing the user
to accurately calculate water savings for the overall program. The model is licensed through
Maddaus Water Management and the California Urban Water Conservation Council (CUWCC) and
has been used by more than one hundred and fifty (150) communities throughout the world,
including the City of Petaluma and SCWA, to analyze the cost effectiveness and water savings of
water conservation programs. One hundred and twelve (112) water conservation measures, after the
fatal flaw analysis, were compiled into comprehensive tables for future evaluation by the project
team to determine which measures would be included in a water conservation program for further
analysis using the DSS Model.
The selected measures were then prioritized based on the evaluation criteria for inclusion into three
water conservation programs each with a varying number of water conservation measures for
further evaluation. For each of the water conservation measures remaining, the project team
determined the customer sectors and implementation rate to be evaluated within the program. When
the screening process was complete, twenty-eight water conservation measures remained for
inclusion into one or more of the three water conservation programs to be modeled utilizing the DSS
Model. In addition, twenty-four other measures were identified as measures that would not be
modeled, but rather included into the City of Petaluma's Water Conservation Plan.. Such items
reduce water use with little cost to implement, such as increasing publicity for water efficient
products and requiring training of water conserving practices for landscape maintenance workers.
Table 1-1 shows the twenty-eight water conservation measures selected for inclusion into one or
more of the three water conservation programs for further evaluation utilizing the DSS Model. (D)
denotes a requirement for developers for implementing "on -site" measures. All measures were
included in Program 3 with fewer measures included in Programs 1 and 2.
TABLE 1-1
WATER CONSERVATION MEASURES INCLUDED IN WATER CONSERVATION PROGRAMS 1, 2, AND 3
Resolution No. 2008-021 N.C.S.
1 /17/2008
1-4
#5320
Page 6
(D) denotes a requirement for developers for implementing "on -site" measures.
Evaluation of Potential Water Conservation Program
The three programs outlined in Table 1-1 were analyzed for cost effectiveness and water savings
using the Least Cost Planning Decision Support System (DSS) Model. The model developed a water
demand baseline profile for the City of Petaluma. Wastewater savings and energy savings costs are
also estimated and included in the cost benefit analysis. Projected water demands developed under
the Water Demand and Supply Analysis Project were used to calibrate the model forecasts.
Output data for the DSS Model for each program included the following information:
e Program water savings for each year of the program.
e Program cost for each year of the program.
e Benefit -cost ratios for each measure included in the program. Utility benefit -cost ratios include
only the impact on the utility or City. Utility -developer benefit -cost ratios include the impact on
the utility as well as the developer who may have to pay increased connection fees or pay for
more water conserving devices as a baseline cost to the development. Community benefit -cost
ratios include the impact to the utility (City), developer, and customer.
o Amount of water saved for each measure included in the program.
The DSS Model output data for the three water conservation programs evaluated indicated total
program water savings at Buildout (2025). The good news was that each program's water savings
exceeded the established goal of 495 MG/Year. The water savings are shown in Table 1-2.
Resolution No. 2008-021 N.C.S.
1 /17/2008
1-5
#5320
Page 7
TABLE 12
PROGRAM 1, 2, AND 3 YEAR 2025 WATER SAVINGS
Program"oAs
�Water'Sa�ed in�yyyiADMMRetluction
1�
Water conservation measures are implemented over many years and it takes time for water savings
to develop. Program costs were calculated within the DSS Model. Costs were developed based on
cost to the utility (City) only and cost to the utility (City) plus development community. Table 1-3
summarizes these costs.
TABLE 1.3
PROGRAMS 1, 2, AND 3 COST INFORMATION
'ib.{.��kT4
�Conservar
tyTj hr�tr�:"'fi
$'�'`e�j
:1 -_ Present
Worth•
�.•
• ::
•:: 1�
1� .:
1
' -• :1
- Present
Worth.
•: •
11 ••
. •
:•
/EWE
0
• - •• I
•1
•
1• •
'.•
Note: All costs are in 2006 dollars
On an 80 year present worth cost basis all three programs evaluated are more cost effective than
creating more potable water supply. The annualized 80 year present worth cost per unit of water
saved for Programs 1, 2, and 3 is less than the current cost to purchase and distribute SCWA water to
the City of Petaluma's potable water customers. The current cost of purchasing potable water from
SCWA and distributing the water to the City of Petaluma customers is $2,661/MG or $870/acre-foot.
Since the three water conservation programs' water savings in Year 2025 exceed the City's needs and
the Water Conservation Program goal of 495 MG/Year, the three programs were further evaluated
by the project team. Water conservation measures that were more costly than others, saved only
small quantities of water, or could be difficult to implement were removed. Feedback gathered from
the community and City Council on September 10, 2007 was incorporated into the final program.
Through this process, the water conservation project team was able to develop a recommended
program that met the water conservation plan goal for water savings of approximately 495 MG/Year
at buildout, but also reduced the cost of the overall program and achieved a lower cost per unit of
water saved. The recommended water conservation program includes nineteen of the original
twenty-eight water conservation measures modeled. A list of the reconunended water conservation
program's measures is shown in Table 1-4.
Resolution No. 2008-021 N.C.S.
1 / 17/2008
1-6
#5320
Page 8
TABLE 1-4
SUMMARY OF MEASURES INCLUDED IN THE RECOMMENDED WATER CONSERVATION PROGRAM
(D) denotes a requirement for developers for implementing "on -site" measures.
Recommended Water Conservation Program
Since the development of the water conservation programs 1, 2, and 3 and measures described in
Section 5, three changes were made to the recommended program. First, California passed AB 715
which requires that on or after January 1, 2014, all toilets and urinals sold and installed u1 Califonua
be high efficiency models; therefore, measures P-9 and P-10 were revised to start implementation in
2008 and stop implementation at the end of 2013. Second, measure P-10 was modified from a
mandated retrofit at resale program with City rebate to a program where the City will purchase and
install high efficiency toilets for customers with high flow toilets. Third, highly efficient washing
machines will be offered as part of the purchase package to buyers of new homes and not required to
be installed by developers. This change was implemented following discussions with the
community and City Council on September 10, 2007, November 20, 2007, and January 15, 2008. The
model for the recommended water conservation program was updated and rerun to reflect the
restructuring of measure P-10 and P-7 and for incorporation of AB 715 into measures P-9, P-10, and
future water demand projections. Modifications to the program are anticipated as laws change,
technology advances, and participation levels fluctuate. Thus, the City has obtained the DSS Model
and can track and enhance the program as necessary in the coming years to meet the annual water
savings.
The recommended water conservation program contains nineteen (19) measures. These measures are
outlined in Table 1-5. Table 1-5 provides the measure number, name of measure, customer sector(s)
affected, and a description of the measure.
Resolution No. 2008-021 N.C.S.
1 /17/2008
1-7
#.5320
Page 9
TABLE 1-5
RECOMMENDED WATER CONSERVATION PROGRAM MEASURES
This is the indoor component of water surveys for
Existing existing single-family and multi -family residential
P1 Residential Water Customers: SF, customers. Normally those with high water use are
Surveys - Indoor MF targeted. Water use evaluations that are marketed by
realtors during the time of resale and customer call -ins
are also included in this program.
Provide owners of pre-1992 homes with retrofit kits that
Plumbing Retrofit Existing contain easy -to -install low flow showerheads, faucet
P3 Kits (Giveaways) Customers: SF, aerators, hose end nozzles, and toilet tank leak
MF detection devices. These are also provided during
surveys.
a r Bt:dgets EN�Ging and Newer � -
f ® a e : Customers
P�,r®.prde-all,i ng tor- ® any c pes t e>ar �e
P � - r ga�ti®n cca is i h ®�fih i r :a ®n fer 'se
1 gato s ` �ar�e Irnga�tor m • ,��
Commercial Existing Offer high water use accounts a free water audit that Y
P5 Water Audits Customers: CIO would evaluate ways for the business to save water and
monev.
HE Washing I Require developers to offer to install an efficient washer
P7 Machine Offer New Customers: before new home, commercial, or public building
(D) SF, MF, CIO occupancy.
High Efficiency New Customers: Require developers to install high efficiency toilets
P9 Toilet (HET) SF, MF, CIO, (HETs) for new development from 2008 to 2013. The
Requirement (D) INST plumbing code requirement begins in 2013.
Resolution No. 2008-021 N.C.S.
1 /17/2008
1-8
#5320
Page 10
Public
P 11 Information
Program
Smart Controller
P13 with Rain -sensor
Shutoff Device
Requirement (D)
Application
Process for
P15 Landscape
Renovations
>1000 sf and <
5000 sf
Raise awareness for water conservation with public
Existing and New education programs such as seminars, video, speakers
Customers: SF to community groups, radio and television time, and
printed educational material such as bill inserts.
New Customers: Require installation of smart controllers with rain sensor
SF, MF, CIO, shut off for all new irrigation systems.
INST
Existing
Customers Developer or contractor to submit application to the City
(>1000 sf and < for approval of renovations greater than 1000 sf and
5000 sf): MF, less than 5000 sf.
CIO, INST
Residential Combination of three types of training classes: (1) Low
P17 Landscape Existing and Water Use Landscaping (2) Homeowner Irrigation, and
Training Classes New: SF (3) Promotion of Water Efficient Plants.
City to require submetering of each commercial unit,
Submetering, New Customers: such as strip malls, and all multi -family accounts. Sub-
P19 meter each unit MF, CIO, INST meters may be provided by the City or the owner
depending upon congestion issues for efficient
installation.
(D) denotes a requirement for developers for implementing "on -site" measures.
Model output data for the recommended water supply program is included in Table 1-6.
1 /17/2008
1-9
#5320
Resolution No. 2008-021 N.C.S. Page 11
z
i7
TABLE 1-6
WATER CONSERVATION MEASURES INCLUDED IN THE PETALUMA RECOMMENDED WATER CONSERVATION PROGRAM
P1
Residential Water Surveys - Indoor
E
SF, MF
1.60
N/A
3.33
26.7
100%
30
�P
r,.
E
S, NtF
1 45
2x
1 mp°fl
3
esdentate,_rS;ra _e,uteA
y6�1A
P3
Residential Retrofit Kit (Giveaways)
E
SF, MF
6.59
N/A
11.33
6.4
75%
6
`W
e u` ets fob Lea ge <Ir�iga or (Separate
r�1
A 'NW,
P4
„Mete s1,°�R
56
N/ '�
56
°0°0
,
P5
Commercial Water Audits
E
CIO
1.73
N/A
1.29
35.3
10%
3
. .P6Gfotties;��yash
r e e I ce>�true e
E
� 5' 1=;CC0 .
_ 2,. 2 V,
. N%%� �
High Efficiency (HE) Washing Machine,
P7
Offer D
N
SF,MF,CIO
36.41
0.89
0.97
34.2
100%
Indefinite
1= ucetsan Shower ead -{ir`e t
�R
KM
1:NS%I
2__0 `�
4-
4
High Efficiency Toilet (HET) Requirement
P9
D
N
SF,MF,CIO, INST
17.09
0.68
0.75
15.7
100%
Indefinite
M.
P10
CiU' '�rc.jase e0d' n ifi "DES
,. I'N
P11
Public Information Program
E,N
SF
1.96
N/A
3.67
22.4
Varies
30
rn " �°i• tt•n a=a11er :e "'motes �.�.
� ..
`•P'12.�
2Q�p+ u
����®�.'t`)b
�02 •
fA
0,;�,��
1
y®..�4
Smart Irrigation Controller w/ Rain Sensor
P13
Requirement D
N
SF,MF,CIO, INST
47.32
1.15
1.27
46.9
100%
Indefinite
Application Process for Landscape
CDD Permit
P15
Renovations >1000 sf and < 5000 sf D
E,N
SF,MF,CIO,INST
3.56
0.33
0.41
55.8
application/1 00%
10
. .,G �I
c a e En; orcetxten Hof Land <E
u
-e� it rrient for��ren�ated 1a capng a +
• �;
�
,'; ��.
Audrt Apo o
�
..
P17
Landscape Education Training Program
E,N
SF
8.33
N/A
0.53
15.6
180 eo le/ r
Indefinite
P �8.:
•=�ottel,.�et�af� t�!.{in�nci'a �,s�a_rn�,e,
-
� �CI�,�
2�;3®
/A
0,89
2�,-
�2�°0° "�
{ 5
P19
Submeterin , Meter Each Unit
N
MF, CIO, INST
11.15
3.72
4.29
22.1
100%
Indefinite
ku) UCIIUMC Q ICI.'U II1-,I11MI IUI UCV1_IUPU1Z. IUI II11PICIIII-.IIL111V UII-blM II ICC7JUICJ.
2 Benefit -cost ratio is a ratio of benefits, estimated from cost savings due to purchasing less water from SCWA, and the costs, estimated from the indicated party's cost to
fund rebate programs, check that requirements have been made, install devices, etc. The higher the benefit -cost ratio, the more cost effective the water conservation
measure is to the party indicated compared to the other measures considered.
ti Benefit -cost ratios and water savings for individual measures do not add up to total benefit -cost ratio and water savings for the program.
Results include passage of AB715 in October 2007 which requires that all toilets and urinals sold and installed be high efficient models by January 1, 2014.
CD
N
1 it 7/2008
1-10
#5320
The DSS model output data for the recommended program indicates a total annual water savings of
448 MG/Year in Year 2025 and an Average Day Maximum Month (ADMM) reduction of 2.39 mgd in
Year 2025. The information is presented in Table 1-7 and can be seen graphically in Figure 1-2.
TABLE 1-7
RECOMMENDED PROGRAM WATER SAVINGS
As a result of incorporating AB 715, the amount of indoor water savings within the recommended
water conservation program has decreased. The overall combined water savings from the effect of
the updated plumbing code which incorporates AB715 and the recommended water conservation
program results in a potable water offset that exceeds the established goal for this project of 495
MG/Year. The recommended water conservation program results in a water savings of 448
MG/Year. The increase un water savings from the building code is estimated to be 55.6 MG/Year.
Therefore the total net water savings is 503.6 MG/Year.
Resolution No. 2008-021 N.C.S.
1 /17/2008
1-11
#5320
Page 13
FIGURE 1-2
WATER SAVINGS EACH YEAR FOR THE RECOMMENDED WATER CONSERVATION PROGRAM
500
450
400
350
300
N
E 250
�v
a�
200
r
R
�: 150
100
50
v
--*—Current City Program
through 2008
•— Recommended
Program (2008-2025)
2004 2009 2014 2019 2024
Year
The recommended programs costs were calculated using the DSS Model. Annual program costs as
well as annualized 80 year present worth cost and annualized 80 year present worth cost per unit of
water saved are included in Tables 1-8 and 1-9. These costs were calculated based on the cost to tine
City of Petaluma (Utility) only and cost to the utility plus development community. Recommended
Water Conservation Program 80 Year Present Worth values are summarized in Table 1-8. Table 1-9
describes annual capital and operations costs for implementation of the nineteen water conservation
measures under the recommended program for Years 2008 through Year 2025. All measures start in
Year 2008 except measure P12 which starts in Year 2010. On an 80 year annualized present worth
basis, the recommended water conservation program is more cost. effective than any of the three
preliminary programs evaluated (Table 1-3), more cost-effective than obtaining additional water for
the City through City -owned groundwater wells ($3,416/MG or $1,113/acre-foot), and even more
cost-effective than the current cost to purchase potable water from SCWA and distribute it to the
City's potable water customers ($2,662/ MG or $870/ acre-foot). Hence, water conservation is the
most economical new water supply/offset source currently available to the City of Petaluma and the
Development Community.
TABLE 1-8
RECOMMENDED WATER CONSERVATION PROGRAM 80 YEAR PRESENT WORTH COSTS
00
. g
Ut�Isty Cosha x�
Utility + _. n, em � �.�;1
Year Present Worth
Annualized 80 Year ?'resent Worth
Water80
Annualized 80 Year Present
Worth/Unit of -.
$2,137 MG
•• ..
, _- .•
Resolution No. 2008-021 N.C.S.
1/17/2008
1-12
#5320
Page 14
TABLE 1-9
RECOMMENDED WATER CONSERVATION PROGRAM ANNUAL COST
z
Ln
u
1 /17/2008
1-13
#5320
Funding Mechanism
The recommended water conservation plan modifies the overall recommended water supply project
outlined in the Water Demand and Supply Analysis Report dated June 2006. The modifications
include increased water conservation, elimination of City -owned groundwater well supply, and
incorporation of a contingency factor to ensure that potable water demands will be met. To meet the
annual buildout shortfall amount of 772.72 MG/Year and the ADMM shortfall amount of 5.0 mgd as
outlined in the Water Demand and Supply Analysis Report, both the recommended water
conservation plan detailed herein, and the recycled water system developed within the Water
Demand and Supply Analysis report, will need to be implemented. Combined, they are referred to as
the recommended water supply project.
An update to the City's water utility capacity charge for new development was prepared based on
the recommended water supply project. The charge incorporates the cost for additional potable
water supply through recycled water and water conservation offset. The Water Capacity Charge
Update was prepared by Bartle Wells Associates. The capacity charge defrays the capital costs of
facilities to serve growth. The capacity charge includes a buy -in for the value of the City's existing
facilities, a proportion of planned water capital improvements cost, and the cost for new water
supply as described herein.
Bartle Wells Associates is currently developing an updated water capacity fee study that will address
the improvements and projects outlined in this report as well as review current water, storm water,
and wastewater charges. This report is scheduled to be submitted in February of 2008. This section.
will be updated after approval of the revised study.
Implementation
The water conservation program developed is projected to save 448 MG/Year by Year 2025. This
program is very aggressive and will require considerable effort by City staff to implement. Since the
program must start in Year 2008 to achieve the water savings goal in Year 2025, the City should begin
work immediately to get the required ordinances, development standards, and programs in place. Of
the nineteen measures identified for implementation, five of the measures are directly related to new
development and will require developers to utilize water efficient practices and install certain water
efficient devices. A detailed implementation plan for each of the water conservation measures
between Year 2008 and Year 2025 (Buildout) has been developed to aid the City to implement the
program.
The City has obtained a copy of the DSS Model for in-house use. This model is a powerful tool and
will serve as a great asset to the City throughout implementation of the program. The model should
be updated annually with the actual implementation data for each measure to determine if the City is
on track to meet the water savings goal. In addition, the model can be modified to determine how
implementation rate adjustments and changes such as additions or deletions of measures will affect
the filial water savings outcome. The program developed under this study is meant to be an evolving
program allowing the City to adjust implementation rates and/or measures over the life of the
program to meet changing conditions and teclunology over the life of the 18-year plan to achieve the
overall water savings goal.
Ili addition to the standard and proven implementation practices developed for the Water
Conservation Plan, the City will work with Ned Orrett during the initial startup of the water
Resolution No. 2008-021 N.C.S.
1 /17/2008
1-14
#5320
Page 16
conservation program to develop a pilot test for one or more of the recommended off -site water
conservation measures to explore an alternative implementation program. The program will seek to
remove common barriers found in traditional water conservation programs associated with
purchasing and installing proven, cost effective equipment. Under such a program, the City would
incur setup costs for the program, but the overall program may be more cost effective and yield
higher water savings than traditional implementation.
Resolution No. 2008-021 N.C.S.
1 /17/2008
1-15
#5320
Page 17