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HomeMy WebLinkAboutStaff Report 4.A 01/28/2008January 28, 2008 CITY OF PETALUMA, CALIFORNIA AGENDA BILL Agenda Title: Resolution Adopting the Water Conservation Plan Meeting Date: January 28, 2008 Meeting Time: ® 3:00 PM ❑ 7:00 PM Category : ❑ Presentation ❑ Consent Calendar ❑ Public Hearing © Unfinished Business ❑ New Business Department: Director: Contact Person: Phone Number: Water Resources and Michael J. Ban PE Margaret P. Orr, PE 778-4546 Conservation m M. P, v,,. Cost of Proposal: FY08-09 direct cost to City estimated at $591,256 Account Number: 8200-54130 8310-54130 Amount Budgeted: The FY 08-09 budget will include sufficient funds to support the City's direct portion of the plan. Name of Fund: Wastewater/Water Enterprise Attachments to Agenda Packet Item: Attachment A — Executive Summary, Water Conservation Plan Attaclmlent B — Resolution Adopting the Water Conservation Plan Summary Statement: Water conservation is one key to maintaining the economic sustainability of the City and continuing to meet future potable water demands, and can be achieved through implementation of the Water Conservation Plan. Water Conservation Plan that considers water conservation measures that go beyond the BMPs. The Water Conservation Plan presents a road map for serving over 500 million gallons per year (MG/Year) by the year 2025 (buildout of the General Plan). On September 10, 2007, November 20, 2007, and January 15, 2008 City staff gathered information from the public, realtors, and the development community concerning this plan. Trus feedback was incorporated in the project when feasible. The water conservation plan is comprised of 19 water conservation measures that are feasible and attainable by the City. Recommended City Council Action/Suggested Motion: City Management recommends the City Council consider, discuss, and approve the resolution adopting the Water Conservation Plan, and direct City Management to develop the Water Conservation Ordinance. Reviewed by Admin ServicesReview Director: Dat% d v Ci !Aft Aft me : A rove v City Manager: Date: Date: �ti S:\water resources & consen{ation\Conservation\City CouneiNanuary 28 2007\Agenda Bill Final.doc CITY OF PETALUMA, CALIFORNIA JANUARY 28, 2008 AGENDA REPORT FOR RESOLUTION ADOPTING THE WATER CONSERVATION PLAN 1. EXECUTIVE SUMMARY: Water conservation is one key to maintaining the economic sustainability of the City and continuing to meet future potable water demands, and can be achieved through implementation of the Water Conservation Plan. The Water Conservation Plan presents a road map for serving over 500 million gallons per year (MG/Year) by the year 2025 (buildout of the General Plan). On September 10, 2007, November 20, 2007, and January 15, 2008 City staff gathered information from the public, realtors, and the development community concerning this plan. This feedback was incorporated in the project when feasible. The water conservation plan is comprised of 19 water conservation measures that are feasible and attainable by the City. City Management recommends the City Council consider, discuss, and approve the resolution adopting the Water Conservation Plan, and direct City Management to develop the Water Conservation Ordinance. 2. BACKGROUND: Petaluma jump started its water conservation program in October 1999 by providing 1,000 ultra low flush residential toilets. The success of this pilot test lead to development of the City's current water conservation program which includes the California Urban Water Conservation Council's 14 best management practices (BMPs). Through its incentive programs, the City has replaced 3,635 water guzzling residential toilets and 1,200 commercial toilets, replaced 99 water guzzling commercial washers and 2,544 single family residential washers, and replaced 142 water flushing urinals with waterless urinals; conducted over 977 residential "Waterwise" housecalls; measured and developed landscape water budgets for 320 commercial customers; replaced 105 spray rinse valves at local restaurants; installed 73 single family residential smart irrigation controllers; and installed 19 smart irrigation controllers at City parks. These and other water conservation actions taken by the City save 77 million gallons of potable water each year (the amount of water used by over 700 single family households each year). Factoring in plumbing code conservation requirements boosts the conservation savings to 107 million gallons of potable water each year (the amount of water used by over 990 single family households each year). Water conservation is one key to maintaining the economic sustainability of the City and continuing to meet future potable water demands. The Water Supply and Demand Analysis (2006), conducted in support of the General Plan 2025, described in detail the City's long-term plan to meet potable water demands using a combination of potable water from the Sonoma County Water Agency, recycled water, water conservation, and ground water. The water conservation component included an expansion of the City's BMPs. The City Council directed preparation of a comprehensive Water Conservation Plan that considers water conservation measures that go beyond the BMPs. The potable water offset goal established for the Water Conservation Plan was 495 million gallons per year (MG/Year) by the year 2025 (buildout of the General Plan). The annual amount of potable water established for offset via water conservation at Buildout under the 2025 General Plan was 254.5 MG/Year. The goal of 495 MG/Year was established to eliminate the need to use City -owned groundwater wells (60.75 MG) for potable water supply, and to allow for a 25 percent safety factor on the water conservation (63.75 MG) and recycled water (116 MG) offset requirements established under the 2025 General Plan. The intent of the water conservation study was to evaluate and recommend the most cost effective water conservation plan to save 495 MG/Year based on an 80 year present worth, comprised of water conservation measures that are feasible, cost effective, and attainable by the City. City management presented the draft water conservation plan to City Council on September 10, 2007. As discussed then, a total of 202 water conservation measures were initially presented by the project team. After evaluation criteria were developed a shortlist of 112 measures were compiled for further evaluation. Of these, 28 measures were programmed into a highly sophisticated computer model to determine the net water reduction and cost effectiveness of the program. The reconmiended program contains 19 measures and meets the criteria for the project. The Executive Summary of the Water Conservation Plan is provided under Attachment A. Major highlights of the program are as follows: • New homes will be equipped with high water -efficient devices, including highly efficient lavatory faucets, kitchen faucets, showerheads, toilets, and smart irrigation controllers with rain sensor shut off. New home buyers will be given an option to purchase a high efficient washing machine with their home by the developer. Landscaping design must be efficient and approved by the City as part of the permitting process. The proposed requirements were discussed with members of the Home Builders Association. During the meeting it was pointed out that new model homes by Christopherson Homes in Santa Rosa have signage explaining these features to potential buyers. • The program consists of indoor and outdoor water use evaluations for existing single-family and multi -family residential customers. Normally those with high water use are targeted. Water use evaluations that are marketed by realtors during the time of resale and customer call -ins are also included in this program. • Plumbing retrofit devices will continue to be provided to home owners of pre - 1992 homes, water use assessments will continue to be offered to call-in customers concerned about their water use and water bill, rebates will continue for current customers for high efficient toilets and washing machines. New rebates will be started for landscaping controllers. The Department of Water Resources and Conservation is ready to begin implementation by providing a new Water Conservation Ordinance to City Council for approval once input and approval of the Water Conservation Plan is provided. 3. ALTERNATIVES: 1. Approve the resolution adopting the Water Conservation Plan to supply 495 MG/Year based on an 80 year present worth, comprised of water conservation measures that are feasible and attainable by the City. It reserved groundwater for emergency use and provides engineering safety factors for the recycled water and water conservation supply components. 2. Take other action as directed by the City Council. 4. FINANCIAL IMPACTS: The FY 08-09 cost of the program is estimated at $3 million. This includes direct costs to the City, plus costs borne by new development to meet the new water efficient development standards, which will be codified into an ordinance upon direction of the City Council. The City's direct costs in FY 08-09 are estimated at $591,256. The anticipated annual costs are on Table 1-9 in the Executive Summary. CONCLUSION: Diverse sources of water supply give communities the most flexibility in meeting customer demands for water. The City of Petaluma's water supply will continue to be comprised of potable water from the Sonoma County Water Agency, tertiary recycled water for irrigation, and water conservation. This water conservation plan will serve over 500 MG/Year and is comprised of water conservation measures that are feasible and attainable by the City. 6. OUTCOMES OR PERFORMANCE MEASUREMENTS THAT WILL IDENTIFY SUCCESS OR COMPLETION: Efficient use of potable water in a manner that protects the health and welfare of the citizens of Petaluma. RECOMMENDATION: City Management recommends the City Council consider, discuss, and approve the resolution adopting the Water Conservation Plan, and direct City Management to develop the Water Conservation Ordinance. 4 Attachment A — Executive Summary Water Conservation Plan 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. 111 712008 1-1 75320 GARY DODSON Principal -in -Charge MAY ZHAO Project Engineer FIGURE 1-1 WATER CONSERVATION TEAM DANA HUNT Project Manager MICHAEL MOORE GEORGE WHITE IRENE BORBA DAVID IRIBARNE Water Conservation Coordinator DEAN ECKERSON Engineering Manager STEVE SIMMONS Utility Manager GABELANUSSE 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. h1 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 vm200s 1-2 5320 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 thus 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 mnder the Water Demand and Supply Analysis Report. Although the reconmlended water conservation program outlined in 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 1/17/2008 1-3 #5320 limits, 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 programs 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 1/17/2008 9 1-4 :5320 Residential Water Surveys - Indoor X X X Re'stdentiai.`UVa`ter SuNe si. Oiltdbor-- Plumbin Retrofit Kits Giveawa s X X X Wete✓Bud etsfi, -L r e?Icn ator- ' S,e arate':Meters Commercial Water Audits X X X i'hEffcieEVaMbe;H, , Xo Hi h Efficient Washin Machine Requirement D) X X X NeV✓Efficieno'DishWashe'r,.Re High Efficiency Faucets and Showerheads Re uirement D X X X :"..:X High Efficient Toilet HET Requirement D X X X D1fec� I�stallat(oh of HETs,-{or tojlets_,>3 gallons:per `; X X X 1/17/2008 9 1-4 :5320 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 Plaruring 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: Program water savings for each year of the program. Program cost for each year of the program. 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. Amount of water saved for each measure included in the program. The DSS Model output data for the three neater conservation programs evaluated 'indicated total program water savings at Buildout (2025). The good news was that each programs water savings exceeded the established goal of 495 MG/Year. The water savings are shown in Table 1-2. 1/17/2006 1-5 10 � 5320 TABLE 1-2 PROGRAM 1, 2, AND 3 YEAR 2025 WATER SAVINGS Prog Water Saved m ADMM tetluctww ..! 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 13 PROGRAMS 1, 2, AND 3 COST INFORMATION 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 recommended water conservation programs measures is shown in Table 1-4. 1/17/2008 hl 16 5330 TABLE 1-4 SUMMARY OF MEASURES INCLUDED IN THE RECOMMENDED WATER CONSERVATION PROGRAM (D) 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, Califon -da passed AB 715 which requires that on or after January 1, 2014, all toilets and urinals sold and installed in California 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, techrnology 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, ander description of the measure. 1/1712008 12 1-7 5320 TABLE 15 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 targeted. Water use evaluations that are marketed by Surveys -Indoor MF realtors during the time of resale and customer call -ins are also included in this program. P7 HE Washing Machine Offer (D) New Customers: SF, MF, CIO Provide owners of pre -1992 homes with retrofit kits that HE Fauoets and Existing contain easy -to -install low flow showerheads, faucet PB � Plumbing Retrofit SF, MF GIO, at po )afore than 9 5 gpm Kltohen faucets at 2 2 gpm, P3 Req�lrement (Q) Customers: SF, aerators, hose end nozzles, and toilet tank leak Kits (Giveaways) High Efficiency MF detection devices. These are also provided during P9 Toilet (HET) SF, MF, CIO, surveys. Water Budgets Exlsfing anc( NeW plumbing code requirement begins in 2013. for Large Cystorpers Provide a(I Ifr(gators)o) landscapes wlEh separate P4 Irr)gators Large Irrigators In Irngatlbn aecQ is ,with a monthly Ifr(gat)on Water use budget on the`Water bill 3e ;3rate�iGlete} Ct0„ �"U,RF �W . � Offer high water use accounts a free water audit that Commercial Existing P5 would evaluate ways for the business to save water and Water Audits Customers: CIO P7 HE Washing Machine Offer (D) New Customers: SF, MF, CIO Require developers to offer to install an efficient washer before new home, commercial, or public building occupancy. HE Fauoets and New,Customera Requ(re developers to install Lavatory. faucets that flow PB � Showerheads � SF, MF GIO, at po )afore than 9 5 gpm Kltohen faucets at 2 2 gpm, Req�lrement (Q) INST- and showerheac)s at 2 0 gpm High Efficiency New Customers: Require developers to install high efficiency toilets P9 Toilet (HET) SF, MF, CIO, (HETs) for new development from 2006 to 2013. The Requirement (D) INST plumbing code requirement begins in 2013. 1/17/2008 J 1 X532020 Publicttaise awareness for water conservation with public P11 Information Existing and New education programs such as seminars, video, speakers Program Customers: SF to community groups, radio and television time, and printed educational material such as bill inserts. Smart Controller New Customers: P13 with Rain -sensor SFMF, CIO, Require installation of smart controllers with rain sensor , Shutoff Device SF, Ishut off for all new irrigation systems. Requirement (D) INST Enforoe a regujatJon that specifies fhat Jgndsoapes be Landscape and NeW Customers desJghed and 1ltstalled according to Watef effolent P 14' IrrlgaEJor SF, MF GIO, pfinolpals, Wlth approprlateYrrlgatlon systems RequlretPents {D) INST` (Combines WPth SmaftJControJler Ilsted abode) Goal is an overall 25 /a redUehoq of lrrlgatlon Waterruse , Includes_ lahreuley✓ as; art of: fo'ect app rovah rocess; Application Existing Process for Customers Developer or contractor to submit application to the City P15 Landscape (>1000 sf and < for approval of renovations greater than 1000 sf and Renovations 5000 so: MF, less than 5000 sf. 51000 sf and < 5000 sf CIO, INST Residential I Combination of three types of training classes: (1) Low P17 Landscape Existing andNew: SF Water Use Landscaping (2) Homeowner Irrigation, and Training Classes 1 (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 (D) denotes a requirement for measures. Model output data for the recommended water supply program is included in Table 1-6. 14 1117/2008 1-9 ;:5320 77 ko L J 01 U C y T .d E N U O 0I � O O o aE r � c m 0I � p1L C O1 N > L U y � N � d 3 m L N 01 � � O O y = U y UU c C C O V N — C N O 'O t6 O N N C O E � o mv9 L L y L > O O L s s E 3 N _ n N O JO N E m '> m `m 0 �aSo m m a p L N C N N p N OJ U' Ol W T j0 O m o m C 0 N O y ry d O O ❑ O1 J N y U d J O C N U - -O f0 � C 014-_ w E N J m m 0] 0� mOo Ln 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 in 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. 1/1712008 16 1-11 ,5320 FIGURE 1-2 WATER SAVINGS EACH YEAR FOR THE RECOMMENDED WATER CONSERVATION PROGRAM 500 450 400 350 300 250 200 150 100 50 -.—Current City Program through 2008 Recommended Program (2008 2004 2009 2014 2019 2024 Year The recommended programs costs were calculated using the DSS Model. Annual program costs as well as azulualized 80 year present worth cost and amlualized 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 the 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 colder 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 Commurdty. TABLE 1-8 WATER CONSERVATION PROGRAM 80 YEAR PRESENT WORTH COSTS 80 Year Present Worth $7,126,129 $24,895,880 Annualized 80 Year Present Worth $235,959 $824,346 Annualized 80 Year Present $612 / MG $2,137 / MG Worth/Unit of Water Saved $199 / acre-foot 1 $696 / acre-foot 1/1712008 17 1-12 #s32o 9 Cl) iD NC 10 't co CD� 0 l!'] tl- Lr) mr CD m 0) m LO co m 0) co m 0 Z C\i C4 C-4 613 ul 691" es tFi ta ER fff .UT M� 'MIq CD co in, 'o mffi Mem 0 -,,(D cw� -q cli Cd �,Oo' 00 'r -i m �'w 45 613 N ;N CN �N N U3. A(Ai— 6S Eq fH �61)1,1 R LO LO co ED q_ Co 1� 0 'D ,LL7 I "zr 0 0 �'A LO CD, i C'I 7 7� 70_ r 'to 'IT (D -t C\l N CD - '2 m olmi co C\F C\l C\l �C%jl C\j "S �t m "U� m "M NW co 0, A 2"R -0 u) ,I, �La m cc) �K ';r C\j Lo -E\l CN c) CY) cli C,\,I, n lq7 C4 M 0 0 1`0 c5tM' m iK o �b 06 .6 C'f N -C%j C\l KIII, c4l� CD U� m Z' e 4 fla U U� 'j; ui 6k 'C go m N m • m �M� an -co, (D U C\1 itL� C\j LA.'M; T-- N Is (Q "s N m 47 (C) - 'co T. V) co' '6j C6, 2 (3) C" -�r v, C\l 'o 01 Lo l �"Lo B C\l 'p; Ea , J). EH FT 51 q • ID m co r�- "tr$' �0) (D CO �o :F - 44 0 co 'GO)" m 'T N (D CD 00' m � -, t' co L'i n 0, Cli I cn (D ' 'C' 0, (D (a 0 Al-��' R mom '0' C� C\f cd cd, '04 6 cn, LO 01 'In It 61T N U4 N .4 1,64 C\l fR • 0C5 oo ..... CD, 0" C\1 m Go 0 a) n.,, Cn 'CA (01 C'4 (D C ) Ln m m Cd 5 '6 (D XD C) o ED m -14 M �m N'N EFT ER fff ff3 EFT V3 EFT Ef} EF} ca , ea 6 Tl� m m,. 0 N V LO (D co "T to 0 LN N C-4 ol os o o 0' .O' 0 NNNNNN ic) "4 Cj N N C\l C\1 A' 9 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 m 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 plarmed 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 begun 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 amlually 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 final 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 teclulology over the life of the 18 -year plan to achieve the overall water savings goal. In 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 1/17/2008 19 1-14 5320 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. 1/17/2008 20 1-15 5320 Attachment B - Resolution 21 2 4 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF PETALUMA 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 recormnended 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 Surmnary 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. 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 enviromnent. 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. 2. 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. 22 S:hvater resources & consmation\Conservation\City Councihlanuary 28 2008\Petaluma Resolution Adopting Water Conservation Plan Plnal.DOC 51 10 11 12 13 14 15 16 17 18 19 20 21 3. 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 recornrnendations 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 conunence 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. 23 S:\water resources & conservation\Conservation\City CounciNanuary 28 2008\Petaluma Resolution Adopting Water Consenution Plan Final.DOC