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HomeMy WebLinkAboutResolution 2021-09 Potable & Reclaimed Water Improvements, Investigation into CUP & Lake Jesup Reclaimed Augmentation Plant, & Temporary Advisory Regarding Water Concurrency and Supply for New Development RESOLUTION NUMBER 2021-09 A RESOLUTION OF THE CITY COMMISSION OF THE CITY OF WINTER SPRINGS, FLORIDA, DIRECTING THE CITY TO CONTINUE TAKING A PROACTIVE AND COMPREHENSIVE APPROACH TO FINDING SOLUTIONS TO IMPROVE THE AVAILABILITY AND RELIABILITY OF THE CITY'S POTABLE AND RECLAIMED WATER SERVICES FOR CURRENT AND FUTURE NEEDS; INITIATING AN INVESTIGATION PURSUANT TO SECTION 4.11 OF THE CITY CHARTER GENERALLY RELATED TO THE CITY'S EXISTING CONSUMPTIVE USE PERMITS ISSUED BY ST. JOHNS RIVER WATER MANAGEMENT DISTRICT AND THE MULTI-PHASE EXPANSION OF THE CITY'S RECLAIMED AUGMENTATION PLANT AT LAKE JESUP AND RELATED DISTRIBUTION SYSTEM WHICH WERE IDENTIFIED AND PROPOSED IN THE WINTER SPRINGS RECLAIMED WATER AUGMENTATION STUDY DATED SEPTEMBER 20, 2005; PROVIDING A TEMPORARY ADVISORY TO THE PUBLIC AND PROSPECTIVE DEVELOPERS RELATED TO COMPLIANCE WITH WATER CONCURRENCY REQUIREMENTS AND DEMONSTRATING THE AVAILABILITY OF ADEQUATE CITY WATER SUPPLIES AND POTABLE WATER FACILITIES FOR PROPOSED NEW DEVELOPMENT; PROVIDING SEVERABILITY, REPEAL OF PRIOR INCONSISTENT RESOLUTIONS, AND AN EFFECTIVE DATE. WHEREAS, the City of Winter Springs owns and operates a potable water and reclaimed water utility within the jurisdictional limits of the City of Winter Springs; and WHEREAS, maintaining adequate and reliable potable and reclaimed water services is vital to the Winter Springs community and an utmost priority for the City Commission; and WHEREAS, in furtherance of operating these utilities for the Winter Springs community, the City of Winter Springs has obtained two consumptive use permits ("CUP") issued by the St. Johns River Water Management District; and WHEREAS, CUP # 8238 was issued on January 25, 2010, related to ground water for potable use and reclaimed/surface water for irrigation use and will expire on January 25, 2029; and WHEREAS, CUP #105763 was issued on April 10, 2007, related to surface water from Lake Jesup and artesian well water for irrigation use and will expire on April 10,2027; and WHEREAS, pursuant to CUP # 8238, the maximum annual groundwater withdrawals from the City's ground wells have been required to annually decrease to a lower stabilized maximum annual ground water withdrawal limit starting in 2013 (1,715.50 million gallons) and ending in 2023 (1,511.10 million gallons), while the maximum annual quantities of reclaimed/surface water for landscape irrigation was required to correspondingly increase to make up for the reduction in allocation of ground water; and WHEREAS, in support of the CUPs, the City constructed the Lake Jesup Surface Water Plant for purposes of supplementing the City's supply of reclaimed water by approximately 2.25 million gallons a day, but the plant has not produced irrigation water as intended since the time construction was completed; and WHEREAS, the City's 2010 Comprehensive Plan also contemplated that the City's potable water consumption would decrease from historical patterns given, in part, the City's future expansion of the reclaimed water system and conservation programs. See Infrastructure Element,Potable Water Sub-Element, IV-(E), Water Supply Concurrency; and WHEREAS, the City's 2010 Comprehensive Plan, Potable Water Sub-Element IV, also stated that the future expansion of reclaimed and alternative water sources was supposed to reduce the demands on potable water so the City could meet its level of service standards, and the City projected that by 2025, the expansion of reclaimed water would likely be available to every single family detached home connected to the City's sewer system; and WHEREAS,based on information provided by the City Manager and Utilities Director, it appears that the City did not increase its production and distribution of reclaimed/surface water for landscape irrigation as intended by the 2010 Comprehensive Plan and CUPs #8238 and #105763, and that new development projects have continued to rely on potable water for landscape irrigation even though some projects are plumbed with reclaimed water systems; and WHEREAS, reliance on potable water for irrigation purposes, especially by several new large development projects recently, has placed a significant burden on the City to maintain adequate potable water supplies, especially at Water Treatment Plant #1 during periods of low rainfall; and WHEREAS, the City Commission recognizes that the City has historically experienced large variations of potable and reclaimed water usage between wet and dry seasons; and WHEREAS, recently in May/June of 2021, the City experienced a temporary water shortage condition at Water Treatment Plant#1 due to inadequate rainfall and increased potable water demand for household and irrigation usage and, as a result of the water shortage condition, the City Commission adopted Resolution No. 2021-08, confirming a Declaration of Emergency executed by Deputy Mayor Ted Johnson authorizing temporary restrictions related to irrigation with potable water; and WHEREAS, the City determined in January 2021, based on an evaluation of the City's finished water meter records, that the amount of ground water withdrawn from existing wells appears to have exceeded the maximum annual groundwater withdrawals authorized by St. Johns River Water Management District under CUP#8238 for the year 2020; and City of Winter Spring,Florida Resolution Number 2021-09 Page 2 of 7 WHEREAS, notwithstanding the City's ability to pump more water from the ground, the ability of the City's water system to meet consumptive demand is limited by law and the terms and conditions of the City's CUP issued by the St. John's River Water Management District; and WHEREAS, the City Commission further recognizes that several additional large scale projects have been permitted by the City and are currently under construction; and WHEREAS, when these additional new projects obtain their respective certificates of occupancy in the future, the projects will place an additional usage demand on the City's water and reclaimed services; and WHEREAS, based on the aforesaid, the City Commission is directing that the City continue to take a proactive and comprehensive approach to finding solutions to improve the supply and reliability of the City's potable and reclaimed water services for purposes of satisfying current and future demands including, but not limited to, increasing the City's reclaimed infrastructure to distribute more reclaimed irrigation water to customers and reducing the amount of potable water irrigation, completing improvements to the City's water treatment facilities,requiring new developments to use xeriscape or other alternative sources of water, such as stormwater ponds for irrigation, modifying the City's conservation plan to include full or partial funding for water saving devices, evaluating the availability of alternative water sources, increasing enforcement actions on property owners that purposefully do not comply with the City's irrigation restrictions, and making the Lake Jesup Surface Water Plant operational and productive to the extent feasible; and WHEREAS, the City has also proactively approached St. Johns River Water Management District regarding the City's current situation and future water needs, and is taking appropriate actions to improve the City's potable and reclaimed water facilities when feasible and pursuing a modification of the City's existing CUPS so the City's future withdrawals are in compliance with the City's permitted maximum annual quantities of ground and reclaimed/surface water; and WHEREAS, the City Commission also recognizes that Florida law requires adequate water supplies, and potable water facilities shall be in place and available to serve new development no later than the issuance by the local government of a certificate of occupancy or its functional equivalent. See 163.3180(2), Florida Statutes; See also, 2010 Winter Springs Comprehensive Plan, Infrastructure Element, Potable Water Sub-Element IV(E) ("In order to ensure that water is available at time of development, a concurrency management procedure has been implemented....[e]nsuring that the approval of development orders are coordinated with the availability of a water supply."); and WHEREAS, the City Commission desires to provide transparency to prospective developers seeking permits for proposed new development within the jurisdictional limits of the City and advises that pending the City's implementation of the aforesaid comprehensive approach to addressing the City's current and future potable and reclaimed water needs, and obtaining a modification to its existing CUPS, adequate City water supplies and potable water City of Winter Spring, Florida Resolution Number 2021-09 Page 3 of 7 facilities may not, for a temporary period of time, be in place or available to serve proposed new development by the time the developer intends or plans on requesting approval of a development permit including a certificate of occupancy or its functional equivalent; and WHEREAS, the City Commission further advises prospective applicants seeking development permits for new development that the City has the right to deny, approve, or approve with conditions any proposed development permit application under consideration based on whether the developer can demonstrate compliance with all required concurrency requirements including, but not limited to, the provision that adequate water supplies and potable water facilities shall be in place and available to serve the proposed new development; and WHEREAS, the City Commission has further been apprised that a Reclaimed Water Augmentation Study was previously prepared for the City by CPH Engineers, Inc., dated September 20, 2005 ("2005 Reclaimed Study"), and the 2005 Reclaimed Study was apparently used to support the issuance of CUP # 105763 by St. Johns River Water Management District; and WHEREAS, the 2005 Reclaimed Study identified a two-phased augmentation plant utilizing Lake Jesup (and possibly an artesian well located within Parkstone Subdivision) as an alternative source of water for irrigation purposes and a seven(7) phase expansion of the City's reclaimed water distribution system to be completed during a 15 year time period; and WHEREAS, the 2005 Reclaimed Study projected an average reclaimed need of 5.0 MGD by year 2020 which would consist of 2.77 MGD provided by the effluent generated by the City's sewer system and 2.23 MGD to be provided by the planned augmentation plant at Lake Jesup; and WHEREAS,the reclaimed augmentation and expansion plans contemplated by the 2005 Reclaimed Study were only partially implemented when the City constructed the Lake Jesup Surface Water Plant, and the seven phase expansion of the distribution system did not occur; and WHEREAS, in furtherance of finding long term solutions to improve the reliability of City's potable and reclaimed water supplies consistent with the maximum allowable withdrawals permitted under the existing or to be modified CUPs, the City Commission desires to understand why the aforementioned plan was not fully implemented and whether the plan is viable today, however,the technical personnel and consultants utilized by the City in 2005 to prepare the plan and obtain CUP# 105763 are no longer employed by the City; and WHEREAS, therefore, with respect to taking a comprehensive approach to planning to satisfy the City's current and future potable and reclaimed water needs for the betterment of the Winter Springs community, the City Commission fmds it is also necessary to investigate the manner in which the City's reclaimed water utility was previously evaluated, permitted, expanded and operated, particularly with respect to discontinuing the implementation of the expansion plans set forth in the 2005 Reclaimed Study; and City of Winter Spring, Florida Resolution Number 2021-09 Page 4 of 7 WHEREAS, this Resolution is hereby deemed by the City Commission to be in the best interest of the public health, safety and welfare of the citizens and businesses of the City of Winter Springs. NOW, THEREFORE,BE IT RESOLVED BY THE CITY COMMISSION OF THE CITY OF WINTER SPRINGS,FLORIDA,AS FOLLOWS: SECTION 1. Recital. The foregoing recitals are hereby incorporated herein by this reference and are a material part of this Resolution. SECTION 2. Improvement of Water and Reclaimed Services. The City Commission hereby directs that the City continue to take a proactive and comprehensive approach to finding solutions to improve the availability and reliability of the City's potable and reclaimed water services for purposes of satisfying current and future demands including, but not limited to, increasing the City's reclaimed infrastructure to distribute more reclaimed irrigation water to customers and reducing the amount of potable water irrigation, completing improvements to the City's water treatment facilities, requiring new developments to use xeriscape or other alternative sources of water, such as stormwater ponds for irrigation, modifying the City's conservation plan to include full or partial funding for water saving devices, evaluating the availability of alternative water sources, increasing enforcement actions on property owners that purposefully do not comply with the City's irrigation restrictions, and making the Lake Jesup Surface Water Plant operational and productive to the extent feasible. SECTION 3. Authorized Investigation. Pursuant to Section 4.11 of the City Charter, the City Commission hereby desires to officially initiate an investigation into the affairs of the City and such affected City departments and offices for purposes of producing relevant evidence to the City Commission related to the provision of potable and reclaimed water services, as follows: 1. Identify and explain the factual projections and supporting data and analysis that were prepared and produced by the City related to obtaining the following two consumptive use permits ("CUP") issued to the City by St. Johns River Water Management District: (1) CUP 48238 (Ground water for potable use and reclaimed/surface water for irrigation); and (2) CUP # 105763 (Surface water from Lake Jesup and artesian well water for irrigation use). 2. Identify and explain the factual history behind the design, permitting, construction, operation and maintenance of the Lake Jesup Reclaimed Augmentation Plant, as well as the current condition and feasibility of utilizing the Lake Jesup Reclaimed Augmentation Plant in the future. , 3. Identify and explain the factual history behind the reasons why the City did not complete the multi-phased expansion of the City's reclaimed distribution facilities as identified in the City of Winter Springs Reclaimed Water Augmentation Study prepared by CPH City of Winter Spring,Florida Resolution Number 2021-09 Page 5 of 7 Engineers, Inc., dated September 20, 2005. A copy of said study is attached hereto as EXHIBIT «A." Such investigation shall be conducted under the oversight and direction of the City Commission with the administrative assistance by the City Manager and such other persons directed by the City Commission. SECTION 4. Advisory Related to Water Concurrency.The City Commission hereby adopts the following advisory to be publicly published by the City related to new development inquiries and development permit applications: TEMPORARY ADVISORY-WATER CONCURRENCY The City of Winter Springs is currently working on several significant water and reclaimed improvement projects and seeking a modification of the City's Consumptive Use Permit (CUP) with the St. John's River Water Management District in order to increase the City's available water supply to meet anticipated future water demands. Pending the completion of these projects and modification of the CUP, the City Commission hereby advises the public and all applicants seeking a development permit for proposed new development that adequate City water supplies and potable water facilities may temporarily not be in place or available to serve the proposed new development by the time the developer intends or plans on requesting a development permit including a certificate of occupancy or its functional equivalent for purposes of complying with the concurrency requirements set forth in Section 163.3180(2), Florida Statutes. In addition, the City has the right to deny, approve or approve with conditions any proposed development permit application under consideration based on whether the developer can demonstrate compliance with all required concurrency requirements, including the provision that adequate water supplies and potable water facilities shall be in place and available to serve the proposed new development. Please refer to City Commission Resolution No. 2021-09 for additional information. SECTION 5. Severability. If any section, subsection, sentence, clause or phrase of this resolution is, for any reason, declared by the courts to be unconstitutional or invalid, such decision shall not affect the validity of the ordinance as a whole, or any part thereof, other than the part so declared. SECTION 6. Repeal of Prior Inconsistent Resolutions. All prior inconsistent ordinances and resolutions adopted by the City Commission, or parts or ordinances and resolutions in conflict herewith, are hereby repealed to the extent of the conflict. SECTION 7. Effective Date. This Resolution shall take effect immediately upon its adoption. City of Winter Spring, Florida Resolution Number 2021-09 Page 6 of 7 ADOPTED by the City Commission of the City of Winter Springs, Florida, in a Regular Meeting duly assembled on the 12a'day of July 2021. KEVIN McCAANN,Mayor ATTE�/T CHRISTIAN GOWAN, City Clerk •-' ��jR1N6S •'• 1►t o Approved as to legal form and sufficiency for the f inter Springs,Florida only: . : 4 �- :Q A u. ANTHOW A. GARGANESE,City Attorney �•• ed . � • 4A# City of Winter Spring, Florida Resolution Number 2021-09 Page 7 of 7 Exhibit "A" CITY OF WINTER SPRINGS RECLAIMED WATER AUGMENTATION STUDY Prepared By: CPH Engineers Inc. 1117 East Robinson Street Orlando, Florida 32801 CPH Project No W04111 September 20, 2005 City of Winter Springs—Reclaimed Water Augmentation Study Page No. ES-1 Executive Summary Finding alternate sources of water has become a priority for the region because of increased demand for potable water created by continued growth of the area. We are also seeing growth occur from redevelopment at higher densities in the Winter Springs area. In the past Winter Springs was known as a bedroom community. Now it is a vibrant City of its own with a developing Town Center and higher density multistory structures being constructed in and around the Town Center. The City of Winter Springs has many attributes which makes the community a pleasant place to live. To maintain continuous growth, we need to develop alternate sources of water supply. We believe that a natural resource exists in Lake Jesup and that this source can be used for irrigation and free up the groundwater source for potable uses only. Such a plan requires the expansion of the secondary water delivery system and also requires a water source. Irrigation water does not have to be potable and therefore the level of treatment can be reduced. The City already has an extensive reclaimed distribution system and this system can be expanded to meet the future needs of the City of Winter Springs. The project is divided into two phases for the treatment works and seven phases for the distribution system. The project spans the next fifteen years with equally sized distribution projects every two years. Table ES-1. Augmentation Phases Year Ending Irrigation Lake Jesup Treatment Probable Opinion of September 30 Phase Phase Construction Cost 2007 A $2,646,420 2008 1 $2,047,500 2009 2010 2 $2,000,000 2011 2012 3 $2,057,500 2013 B $1,610,400 2014 4 $2,042,500 2015 2016 5 $2,057,500 2017 2018 6 $1,892,500 2019 2020 7 $1,245,000 Total Project $17,599,320 This report reveals that the project is feasible. There are many more steps required to make the project a reality. The following items need to be pursued: 1) Discussion with SJRWMD on the project and coordination with "The Friends of Lake Jesup". Preliminary discussions have been made with SJRWMD. City of Winter Springs—Reclaimed Water Augmentation Study Page No. ES-2 2) Proceed with an application of a Consumptive Use Permit (CUP). This process has been started. 3) Upon approval of the CUP, proceed with pilot testing of the recommended treatment options. 4) Proceed with a design with known data from pilot testing. 5) Proceed with design(s) to expand the reclaimed distribution system. City of Winter Springs—Reclaimed Water Augmentation Study Page No. 1-1 SECTION 1 INTRODUCTION 1.0 Introduction The City of Winter Springs owns and operates two water reclamation facilities, the East WRF and the West WRF. The facilities currently supply reclaimed water meeting public access criteria to two local golf courses, residential irrigation and public areas (such as parks and roadway medians) for irrigation. The City has expanded its reclaimed water system over the years to maximize the operation of the system due to seasonal variation in usage. Seasonally, the City has too much or too little reclaimed water for its customers because of the large variation in usage between the wet and dry seasons. The City is proposing to supplement, or augment, the reclaimed water system to be able to supply irrigation quality water to all of its residents as an alternate to potable water with the capability to serve all users, even during the dry season. Therefore, during the reduced demands of the wet season, all of the reclaimed water from the wastewater plants will be beneficially used for irrigation instead of having to use the percolation ponds or dedicated spray sites. This would further benefit the City and the environment by reducing the potable water demands by reducing groundwater withdrawals. City of Winter Springs—Reclaimed Water Augmentation Study Page No. 2-1 SECTION 2 EXISTING CONDITIONS 2.0 Existing Conditions 2.1 Wastewater Treatment The City currently owns and operates two water reclamation facilities, (WRF). Each facility can treat its effluent to public access reclaimed water standards as defined by Florida Department of Environmental Protection. The WRF's have a combined treatment capacity of approximately 4.08 MGD. 2.1.1. East WRF The East WRF has a distribution pump station that is fed by a three million gallon reclaimed water ground storage tank. The pumping system consists of four (4) pumps; one jockey pump at 500-gpm, two (2) pumps at 1 ,200-gpm each, and one pump at 1 ,800-gpm. The total pumping capacity is 2,400-gpm (3.456 MGD)with the largest pump and the jockey pump out of service. The treatment plant has a permitted capacity of 2.012 MGD and the reclaimed water distribution pump station exceeds the 150% pumping criteria of FDEP regulations. 2.1.2. West WRF The West WRF has a distribution pump station that is fed by a two million gallon reclaimed water ground storage tank. The pumping system consists of five (5) pumps; one jockey pump at 180 gpm, two (2) pumps at 950-gpm each, and two (2) pumps at 600 gpm. The total pumping capacity is 2650 gpm (3.816 MGD)with one of the 600 gpm pumps and thejockey pump out of service. The treatment plant has a permitted capacity of 2.07 MGD and the reclaimed water distribution pump station exceeds the 150% pumping criteria of FDEP regulations. 2.2 Distribution System The existing distribution system is basically split into two areas: the East System and the West System. The two systems are each served by their respective reclaimed water facilities and are interconnected at the northwest end of Oak Forest. While the system is interconnected and water freely flows between the systems, in order to simplify the description of the two systems, they will be referred to as the East and West systems. Please note that the permitted capacity of the disposal sites exceeds the permitted treatment capacity of each of the Water Reclamation Facilities. The East System currently delivers reclaimed waterfrom the East WRF to the areas described in Table 2-1 and shown on Figure 2-1 . City of Winter Springs—Reclaimed Water Augmentation Study Page No. 2-2 Insert Table 2-1 here. City of Winter Springs—Reclaimed Water Augmentation Study Page No. 2-3 Table 2-1. Eastern Reclaimed Water System SITE Permitted Capacity Average Demand (MGD) MGD Tuscawilla Golf Course *Not specified 0.157 Oak Forest Spray Site 0.201 0.20 Percolation Ponds 0.610 0.246 Trotwood Park *Not specified 0.000 Residential Irrigation *Not specified 0.587 *All public access areas permitted for 1.720. The Tuscawilla Golf Course is connected by a 16-inch pipe directly from the WRF. This pipe reduces to a 10-inch and runs west through the golf course to Winter Springs Blvd. At this point, the pipe feeds Tusca Oaks and Arrowhead, as well as the Winter Springs Blvd. median irrigation system. The 10-inch trunk line crosses Winter Springs Blvd and enters the Power Easement. The pipeline follows the Power Easement to the Oak Forest spray site and the point of interconnection with the West System. The East WRF also sends flow through an 8-inch main that runs along Winter Springs Blvd east to Northern Way. This pipe runs a short way up Northern Way to where it crosses over to Seneca Blvd. At this location the main feeds the percolation ponds and the residential irrigation along Seneca. The 8-inch main travels along Seneca to Vistawilla Drive where it feeds the Howell Creek Reserve, Creeks Run, and Eagle's Watch subdivisions. The West System currently delivers reclaimed water from the West WRF to the areas described in Table 2-2 and shown on Figure 2-1 . Table 2-2. Western Reclaimed Water System SITE Permitted Capacity Average Demand (MGD) (MGD) Winter Springs Golf Club 0.350 0.086 Central Winds Park 0.136 0.044 Site 16 Spray Site 0.200 0.043 Dayron Ponds 0.530 0.292 Mt Greenwood Ponds 0.110 0.014 Power Easement Not Re-permitted 0.000 Site 17 Ponds 0.100 0.001 Residential Irrigation 0.795 0.591 City of Winter Springs—Reclaimed Water Augmentation Study Page No. 2-4 The reuse distribution system is shown in Figure 2-2. There are three main branches of the distribution system starting at the WRF. An 8-inch line runs south along the power easement. It follows the power easement (a portion of which is irrigated) east to where it crosses Bahama Road. It then follows Bahama east to Shore Road. The line then splits into 12-inch and 6-inch pipes. The pipes converge at Site 16, then a pipe runs south to interconnect with the East reuse system and a 12-inch pipe runs north to the northeast corner of the Winding Hollow development. At this point the 12-inch runs east to connect Winding Hollow and Stone Gable, and west to connect Central Winds Park. The second main is an 8-inch pipe which runs east out of the plant across the Winter Springs Golf Course to Sheoah Blvd. At Sheoah, the 8-inch runs northeast across the golf course to the Dayron site and a 12-inch line runs down Sheoah to 3rd Street. The 12-inch line runs east along 3rd to Moss Road, south on Moss to Bahama Road, and east on Bahama to interconnect with the previously described first main. The third main is a 12-inch pipe which runs north along the power easement connecting Greenspoint and ending at Wildwood for a future connection. 2.3 Existing Reclaimed Demand. The combined system currently has a demand of approximately 2.34 MGD. Table 2-3 lists the current permitted reclaimed water sites with their permitted capacities and their average usage (December 2003 thru November 2004). Table 2-3. Reclaimed Water Sites (Combined) Permitted Average SITE Capacity Demand MGD MGD Tuscawilla Golf Course Not Specified 0.157 East Side Public Access (Including 1.720 0.587 Residential) Winter Springs Golf Course 0.350 0.086 Residential Irrigation (West Side) 0.795 0.591 Percolation Ponds 1.350 0.553 Spray Sites (Oak Forest & Site 16) 0.401 0.243 Public Area Irrigation (CWP) 0.136 0.044 Total 4.75 2.26 As shown in Table 2-3, the permitted residential irrigation accounts for approximately 2.51 MGD or 62% of the total permitted capacity and for City of Winter Springs—Reclaimed Water Augmentation Study Page No. 2-5 approximately 1.18 MGD or 52 % of the average demand. Table 2-3 also shows that the City has additional disposal capacity to allow for fluctuations in demand as well as supply of secondary water at this time. This allows the City to fully utilize the available reclaimed water for beneficial residential reuse. Very little of the of the effluent goes to non-beneficial reuse and this currently helps to conserve water and reduces demand on the City water system. As of September 2005, there are approximately 1,581 residential reclaimed customers. This equates to approximately 770 gallons per day per lot (customer). More detailed data provided by the City indicates a wide range of customer usage. Therefore, 600 gpd/customer was utilized for planning purposes. The percolation ponds and spray sites can be considered alternate or backup sites. On the surface, it appears that there is approximately 0.70 MGD available for residential irrigation by offsetting the Ponds and spray sites. However, the system often doesn't have enough water for it's customers during the dry season and overloads the ponds and spray sites during the wet season. We assumed that current reclaimed irrigation demand consists of the residential connections, parks and the golf courses. The demand is approximately 1 .62 MGD. For planning purposes, we will consider the existing reclaimed demand to be 1 .8 MGD. The augmentation program will help this situation by providing more reclaimed sites, e.g., residential and commercial irrigation for the entire year. During the wet season (low reclaimed flow demand period), these sites will be provided with effluent rather than being sent to the percolation ponds and dedicated spray sites. This will take the burden off of the percolation ponds and non-public access dedicated spray sites and allow them to be used during more extreme conditions such as abnormally high rainfall years. During the dry season, the augmentation facility will add the water necessary to maintain these additional residential irrigation customers and will in turn reduce the demand on potable water sources (groundwater). City of Winter Springs—Reclaimed Water Augmentation Study Page No. 2-6 Insert Figure 2-2 here. City of Winter Springs—Reclaimed Water Augmentation Study Page No. 3-1 CHAPTER 3 AVAILABLE RECLAIMED POPULATION, WATER FLOWS AND SERVICE AREA 3.1 Population and Future Land Use Population data and projections were obtained from the Seminole County website and is the Socioeconomic Planning Data from Planning and Development, and are the adopted numbers for the County's Comprehensive Plan. This data is consistent with the regional water quality and supply goals (a.k.a. Seminole County region) and the Water Facilities Work Plan of the City of Winter Springs. For additional information on population data, see the Water Facilities Work Plan. These two plans have been fully coordinated. The total growth projected for the service area is 7,210 people for the 15-year period through 2020 based on Table 3-2, Winter Springs Data. This equals a growth of approximately 20 percent for the planning period. If a significant change in population projections occurs due to changes in development, the proposed reclaimed water supply must be reevaluated. Since the reclaimed system is interconnected between the two facilities, we have shown the combined available reuse without regard to where it might be used in the system. TABLE 3-1 EXISTING SERVICE AREA POPULATION PROJECTIONS Traffic Population by Traffic Zone Zone 2000 2002 2008 2020 71 610 990 1590 1613 72 2231 2207 2170 2129 74 50% 254 256 248 247 82 3098 3106 3117 3151 83 4454 4680 5177 5087 84 2205 2279 2391 2345 85 43 93 853 853 86 73 86 702 1079 87 3746 4437 5473 5370 88 3217 2449 2796 2743 89 806 859 939 921 90 3491 3626 3861 3800 91 3362 3341 3337 3320 92 2463 2444 2424 2378 93 20 24 31 35 94 2050 2056 2065 2026 95 2096 2096 2669 2618 Total 33,269 35,029 39,843 39,715 Source: Created for this report based on Seminole County data. Note: Traffic Zone 85 adjusted for actual and projected development in the zone City of Winter Springs—Reclaimed Water Augmentation Study Page No. 3-2 3.2 Reclaimed Water Supply The reclaimed water supply is summarized in Table 3-2. From review of the historical data presented in Table 3-2, an average daily supply of effluent of approximately 63 gallons per capita per day (GPCD) will be available as the basis for the total supply projections. The projected average day supply of reclaimed water for the City of Winter Springs through the year 2020 is provided in Table 3-2. It can be seen from the table that average daily supply for the existing service area will reach 2.77 million gallons per day by the year 2020, corresponding to an increase of approximately 20 percent. This is an annual growth rate of only one (1) percent over the 15-year period from 2005 to 2020. It represents an additional 0.5 MGD for use by residential connections and is equivalent to about 833 connections (lots)at 600 gpd/lot average or 2225 people at 2.67 persons per household. Approximately 0.6 MGD of reclaimed water is available from current supplies that are not beneficially used. This yields a total of 1.1 MGD or 1833 connections or an additional 4895 people. TABLE 3-2 HISTORICAL AND PROJECTED POPULATION AND WASTEWATER FLOW Population Population East West Total Per Per W.S. Data Sem Co WRF WRF Capita Capita Data MGD MGD Actual Average 2000 34,570 33,269 1.020 0.940 1.96 57 2001 34,824 1.098 1.102 2.20 63 2002 35,505 35,029 1.072 1.142 2.214 62 2003 35,931 1.171 1.115 2.286 64 2004 36,362 1.160 1.156 2.316 64 63 2005 36,798 2.32 2006 37,240 2.35 2007 37,687 2.37 2008 38,139 39,843 2.40 2009 38,597 2.43 2010 39,060 2.46 2011 39,529 2.49 2012 40,003 2.52 2013 40,483 2.55 2014 40,969 2.58 2015 41,461 2.61 2016 41,958 2.64 2017 42,462 2.68 2018 42,971 2.71 2019 43,487 2.74 2020 44,008 39,715 2.77 Notes: Winter Springs Based on 1.2% Projected Annual Growth. Projections of flow based on 63 gpcd. City of Winter Springs—Reclaimed Water Augmentation Study Page No. 3-3 For projection purposes, the Winter Springs data was used as this would be the more conservative approach. Use of higher population data will cause the improvements to be in place prior to the need. The St. Johns River Water Management District (SJRWMD) is increasingly requiring public water suppliers to implement methods of wastewater reuse to reduce groundwater withdrawals from the aquifer and the existing system along with expansion will benefit the City when re-applying for a new Consumptive Use Permit. 3.4 Service Area Growth The City of Winter Springs is highly developed and is surrounded by other highly developed areas. To the West of U.S. 17-92 is the Longwood service area; to the South is the Casselberry and Seminole County service areas, to the Southwest is the Oviedo service area; and to the North is Lake Jesup. The area available for future service area is the Northwest quadrant of the S.R. 417 and S.R. 434 intersection. Some of this area has already been incorporated into the Winter Springs City Limits and has become part of the Winter Springs service area. We have included this area up to Canal Street and North of S.R. 434/Florida Avenue to Lake Jesup. This area is currently zoned suburban-residential. County zoning designations are A-3; A-5 and A-10 for the area. City of Winter Springs—Reclaimed Water Augmentation Study Page No. 4-1 SECTION 4 ANALYSIS 4.0 Analysis The expansion of the reclaimed water system with the supplementation or augmentation of surface water from Lake Jesup was analyzed based on the treatability of the Lake Jesup water and the feasibility of the implementation and construction of the distribution system. Based on the City map and other available data and planning sessions with the city staff, there are potentially 11,318 residential units/customers in the service area, of which 1,581 are connected, leaving 9737 potential connections. This number includes all townhomes and condominiums available for service. Current development trends in the City are for higher density town home/condom inium units which have a much lower demand for reclaimed water. We do not believe that all water customers will utilize secondary water for irrigation. Not every lot owner will invest in an in-ground irrigation system and pay the monthly fees associated with irrigation. Also, some customers are in townhomes, apartments and condominiums which will not use reclaimed water to the same extent as single family homes. Therefore, for planning purposes we identified 6,672 future connections (total available units are 8253 minus 1581 existing connections) based on the number of single family detached units within the service area. Using the 80% factor described herein, the planning number for new connections is 5338 future connections. The current reclaimed water usage of the existing customer base averages less than 600 gpd/customer on an annual basis. The usage ranges between 250 and 700 gpd per customer. This was based on a random sampling of existing customer accounts. For planning purposes, we used the higher average to assure that the system has the ability to serve the potential demand. Historically, we have seen a 35-50% participation in retrofit reclaimed water irrigation programs. We have projected an overall average herein of 80% because the trend is for more people to use reclaimed water as a secondary source as acceptance of this grade of water grows. The golf courses, residential irrigation and the public area irrigation, such as the parks, are also beneficial irrigation sites. The percolation ponds and the spray sites are secondary, or backup, disposal sites. The total beneficial irrigation demands yields a projected total demand of approximately 5.0 MGD AADF, including existing reclaimed demand. This figure is based on 600 gpd per customer annual average daily flow; 300 gpd per customer for the wet season flow; and 900 gpd per customer for the dry season flow. It consists of 3.20 MGD AADF future flow (0.8*6672 customers*600 gpd/customer) and 1 .8 MGD existing demands. Currently, the two WRF's can only supply 2.32 MGD based on their average daily flow. The projected supply by 2020 is 2.77 MGD based on projected population growth. The remaining 2.23 MGD AADF, say 2.25 MGD AADF for planning purposes, could be withdrawn from Lake Jesup to supplement the demand. This number should be increased to 4.73 MGD (5.0 MGD AADF * 1 .5 dry season peaking factor minus 2.77 MGD effluent available) to account for a higher demand during the dry season. The dry City of Winter Springs—Reclaimed Water Augmentation Study Page No. 4-2 season will be the time of year where the demand will be the highest and the time of year where supplementation will also be required. This data was cross-checked with the water plant usage. The three water treatment plants combined average approximately 3.784 MGD. Irrigation water can be as much as 30-40% of the potable water usage in a system. By assuming that the water plant irrigation production is 30%, the supplementation from Lake Jesup would need to be approximately 1 .135 MGD. However, customers typically use reclaimed water at higher volumes than potable water due to the lower cost. Therefore, the range of supplementation would be a low of 1.135 during the wet season to a high of 4.73 MGD during the dry season (assuming 80% participation and a dry season demand of 900 gpd/customer). We believe the facility should be designed for a 2.25 MGD AADF rate in two phases. In discussions with City staff, it was determined that many older established areas within the western part of the City do not have automatic irrigation systems. This accounts for some of the difference between the projected reclaimed flows versus the actual water plant flows. We expect that the demand for reclaimed water will change the current situation as it will provide a cheaper source of water for irrigation purposes. The different areas were analyzed and discussed with the City to determine the most effective and beneficial sites to add to the system over time. This prioritization is based on expansion of the system from the existing infrastructure outward equally distributed between the two wastewater effluent sources and one augmentation source. It is not based on projected demand or potential for disposal. This maximizes the use of the existing infrastructure. The expansion of the reclaimed water distribution system has been prioritized and is further detailed in Section 5.0. 4.1 Available Artesian Well An artesian well exists within the Parkstone subdivision directly west of the proposed augmentation treatment site. It is located at the east end of Sandringham Court. Attempts have been made by the St. Johns River Water Management District to plug/cap this well, but these efforts have unfortunately failed. However, we believe we can turn this into an advantage for the augmentation system. The water quality of this well is very good. It does not contain solids and the turbidity is low. It can easily be used for irrigational purposes or to supplement the reclaimed water system. We propose a routing of this flow to a new submersible pump station. When demand is high for reclaimed water, this well water can be pumped to the supplementation site and stored in the storage facility for distribution into the reclaimed water system. It is estimated that this well flows at a rate of one (1)million gallons per day. If the flow is not required, it will flow through the off-line submersible pump station and into Lake Jesup as it presently does. The transfer line will be approximately six (6) inches in diameter and will be routed along rights- of-way and easements to the augmentation facility. The line is approximately 3420 lineal feet. At a cost of $50.00/LF, the estimated construction cost is $171,000. City of Winter Springs—Reclaimed Water Augmentation Study Page No. 4-3 4.2 Distribution System Analysis The demand was incorporated as part of a distribution pipe model known as WaterCAD, a computer hydraulic modeling software. The City's current reclaimed water piping model was expanded to encompass the entire City. The demand was based on 100% participation over an 8-hour irrigation period. The model was run several times to estimate the necessary pipe sizing, using a maximum pipe velocity of 5 feet per second (fps) as a guideline, and to estimate the required withdrawal from Lake Jesup. The distribution system demand is based on a peak condition to allow the system to operate properly during the dry season. The modeled demands will necessarily be higher than the annual average demands discussed in other Sections of this report. The model was run using a "worst-case" scenario, which assumes all future residential connections use 900 gpd (dry season demand). This scenario, while also assuming a 100% connection rate, produces a reclaimed water demand of approximately 8 MGD. The peak demand would occur during the driest months of the year, when the demands are higher. The system must be capable of supplying water during these seasonal variations. Therefore, the model was run using the peak usage rate of 900 gpd/lot. The model was evaluated using a peak condition of 12 MGD, which assumes 50% of the connections are running over an 8-hour irrigation period. This is equivalent to a peaking factor of 1 .5 times the dry season demand. The dry season demand is 1 .5 times to AADF, so the combined peaking factor is 2.25. A 50% connection rule was used because of the current SJRWMD water conservation regulations. By spreading the demand equally and designing to conservative criteria, the system can be fully designed and be capable of handling higher flows, velocities, and pressures in localized areas. The model was initially analyzed in a `built-out' scenario. This initial model run served to determine the necessary pipe sizes throughout the system. The next step was to break the system into logical, constructable `Phases'. Seven total Phases were developed, as shown on Figure 4-1 . The model was then run for each Phase, in sequence, to determine if the pipe sizes required for the ultimate scenario will be adequate for each intermediate scenario. The Phases and modeling results are further detailed in Section 5. City of Winter Springs—Reclaimed Water Augmentation Study Page No. 4-4 Insert Figure 4-1 here. City of Winter Springs—Reclaimed Water Augmentation Study Page No. 4-5 4.3 Treatment System Analysis 4.3.1 Reclaimed Water Supply The Water Reclamation Facilities have a combined treatment capacity of 4.082 MGD. They are currently running at approximately 2.32 MGD.As the City grows, the wastewater supply to the WRF's will grow as well. However, if reclaimed water irrigation systems are required on all new developments, more reclaimed water will be required than is generated by each new development, e.g., sewerage flows generated by new households are about one-third of the irrigation demand. Therefore, the needs of the system were determined based on the current supply and potential demand for reclaimed water. Based on the needs previously discussed in Section 3.0 and this section, the total annual average daily demand is estimated to be a approximately 5.0 MGD. This yields a shortage of approximately 2.25 MGD AADF (4.73 MGD dry season as described above) if we are to provide all projected secondary uses (non-potable)with a separate water supply source, a.k.a., reclaimed and augmentation water. The main sources for irrigation water augmentation are: surface water, ground water, or stormwater. One of the purposes of this expansion of the reclaimed water system is to take demand off of the aquifer, which is the primary potable water source for the area. Therefore, using ground water (including shallow wells) as an augmentation source serves no beneficial purpose except in the case of the artesian well described in Section 4.1 . Stormwater systems are a viable source of low volume irrigation needs. Most stormwater systems are not designed to hold excess water, which can be used for irrigation. They are not large reservoirs available for use when needed by the demand. They are scattered throughout the City and multiple pump stations and treatment facilities would be required. Further, many stormwater system have no available water or are completely dry during the dry season when the augmentation water would be needed most. The surface water option is the most feasible and beneficial. Central Winds Park, which is owned by the City, borders on Lake Jesup. Property adjacent to the park has been purchased by the City Utility Department. This adjacent property can easily accommodate a Facility to withdraw and treat the surface water to reclaimed water standards to be blended into the existing reclaimed water distribution system. 4.3.2. Treatment of Surface Water The treatment process required on Lake Jesup water would not be a difficult one. The water quality is within normal surface water ranges, and the proposed use is non-potable. Therefore, many chemical parameters can remain unchanged. Nutrient removal would not be required to utilize the surface water for public access irrigation purposes. It is required that the water be safe from a bacteriological standpoint and as such, the suspended solids would have to be reduced so that the City of Winter Springs—Reclaimed Water Augmentation Study Page No. 4-6 chlorination processes can properly remove ("kill')the bacteria that may exist in the surface water. The current standards do not require a chlorine residual in the distribution system and even if they did, this would not be difficult to accomplish. Water must meet high-level disinfection criteria prior to leaving the treatment facility or the "Point of Entry" into the distribution system. The treatment process must meet the following criteria to be viable as an augmentation system: 1 . Must be flexible in terms of capacity of flow treated and on-off conditions. 2. Must be easily started and usable water must be immediately available to the distribution system. 3. Must be able to withstand extended downtime without adverse affects on treatment. The treatment provided will be low service supply pumps, filtration, transfer pumps, storage, disinfection via the storage tanks and high service distribution pumps. Lake Jesup also acts as a storage reservoir and the treatment facility needs to be designed as an "on-demand" system. We recommend that the facility be operated as a supplemental facility in all aspects. The facility should be connected into the SCADA System and when needed, it will be activated and the pumps will supply flow to the filters. If demand drops off, the system will be automatically shut down. Monitoring of turbidity will be required and if either fails to meet the requirement, the system will be shut down. To accomplish our goals, it will be necessary to have a filter system that can sit idle and then be called into use and also provide a variable rate flow without degradation of filtration ability. We believe the only filters that can achieve this is the fabric disk type filter or the coarse filter membranes suspended in a tank. Further research would be required during the preliminary engineering design phase of this project. We evaluated the pressure disk type filters for another project and found that they could not remove the algae from pond water to a low enough concentration to meet public access criteria. This pond was a "controlled" environment and did not have the TSS contaminants like Lake Jesup. The Turbidity and TSS parameters were much too high to be removed without chemical addition. Further research is required to find the best treatment option. The filter backwash would be sent to the West WRF via the lift station / forcemain system. The backwash generated will depend on the treatment process and will also need to be evaluated during preliminary design. 4.3.2.1 Filtration Evaluation City of Winter Springs—Reclaimed Water Augmentation Study Page No. 4-7 Plastic Disk Screens—Two years ago we tested a product in Eustis on a reclaimed water holding pond. This was a hypalon lined pond at their hayfield disposal site. The disc filter was an in-line pressure filter system. The discs are plastic and separation occurs by serrations in the discs. During filtration, the discs are compressed together and they expand during backwashing. This system cannot produce turbidity levels below 5 TSS. Much of the algae in the pond was forced through the openings and not separated. TSS levels "in" were 30-35 mg/I and "out" were 10-15 mg/I. This product would not be acceptable forour needs on this project. Stainless Steel Filter Screens — Two years ago we tested a stainless steel filter screen at the East WRF. This product was used on the effluent from the holding pond. It did not produce satisfactory results. Pressure Stainless Steel Screens — This is a similar product to the plastic disk screen and has the same problem of pushing solids through the screen under pressure. Fabric Covered Disk Filters — The City of Eustis main wastewater treatment plant has fabric disk filters by Aqua Aerobics. These have been in place for several years and are operating with no problems. We believe this type of filter meets the criteria above and we also know they can meet a 5 TSS criteria. The filters can sit inactive for long periods of time with no adverse affects. When placed out-of-service, they must be backwashed/cleaned and placed on standby. Dyna-Sand —These filters were eliminated from further consideration because they need to be constantly operated to prevent them from "binding". They work on the principle of a fluidized bed and if they are left alone, the media has a tendency to "solidify". We do not recommend this filtration system for this project. Gravity Sand Filters—These filters were also eliminated from further consideration because they need to be constantly operated to prevent them from "binding". We do not recommend this filtration system for this project. Membranes— Membranes are used on a variety of project and we believe they can be used for this application as well. They are a viable candidate and can be left in the "wet" condition and operated when needed. Further consideration should be given to this product. 4.3.3 Lake Jesup Augmentation The Lake Jesup water quality was evaluated to determinate what kind of treatment is necessary before it can be pumped into the network. To complete this objective the last 6 years physical-chemical data reports for this water was analyzed. The data was supplied by the St. Johns Rivers Water Management District (SJRWMD) and it corresponds to the daily data of the samples taken in seven different points around the lake from 1997-2002. The data includes the values for the pH, TSS, City of Winter Springs—Reclaimed Water Augmentation Study Page No. 4-8 TDS, Chloride, and Sulfate. This data is attached in Appendix A. Monthly and annual averages as well as seasonal variations were analyzed for each parameter. These parameters were then compared against the minimum requirements set forth by the Florida Department of Environmental Protection. FDEP requires that all waters entering reclaimed water systems must meet the same standards as the wastewater facility permit. The FDEP requires high-level disinfection and Total Suspended Solids reduction to meet the public access reuse criteria (62- 610.472(3)a1). Another criteria is to compare these values with the Secondary Drinking Water Standards and is shown in Table 4-1. It compares the quality of the surface water to secondary drinking water standards. Also shown in Table 4-1 is each parameters average, dry, and wet season value as accumulated by the SJRWMD. The total dissolved solids (TDS) value averages between 550 to 750 mg/L throughout the year. The TDS typically peaks at around 750 mg/L during the June and July summer season. This timeframe also presents the highest peaks of the year, with the highest recorded value being almost 1200 mg/L. The annual average TDS concentration is approximately 630 mg/L. The secondary drinking water standard value for this parameter is a maximum of 500 mg/L. Sulfates average between 40 and 80 mg/L per month with an annual average of approximately 61 mg/L. The secondary drinking water standard value is 250mg/L. There were no samples in the seven year period that exceeded the secondary drinking water standard. Chlorides average between 170 and 340 mg/L per month with an annual average of approximately 250 mg/L. The secondary drinking water standard value for chlorides is 250 mg/L. This standard is typically exceeded from March to August. The maximum recorded value was close to 500 mg/L. Chlorides could be a problem because high chlorides have an adverse effect on vegetation. The TSS value averages between 20 to 65 mg/L per month with an annual average of approximately 35 mg/L. The FDEP standard value for TSS is 5 mg/L. The TSS typically peaks in June with a recorded high of 97 mg/L. The treatment system needs to be capable of reducing the TSS by 31 mg/L on average and by 61 mg/L during peak conditions. The pH of the water is typically between 8.0 and 9.5 throughout of the year. During the summer season the pH increases to a maximum of 9.5. The secondary drinking water standard for pH is between 6.5 and 8.5. All of the parameters show a tendency to peak around June-July and reach a low point around November-December. Overall, the treatability of the water from Lake Jesup to non-potable public access irrigation standards is good. Options to treat this water to FDEP standards is further discussed herein. Irrigation demand is generally City of Winter Springs—Reclaimed Water Augmentation Study Page No. 4-9 lower in June/July due to rainfall and therefore, the augmentation system would not be fully utilized during this timeframe. City of Winter Springs—Reclaimed Water Augmentation Study Page No. 4- 10 Table 4-1. Lake Jesup Water Quality Data Secondary Drinking Average Dry Wet Parameter Units Water Levels Season Season Field PH 6.5-8.5 8.69 9.43 7.89 Total Suspended Solids mg/I 5 35.43 65.49 20.63 Chloride mg/I 250 250.11 338.38 176.06 Sulfate mg/I 250 61.12 81 .04 40.78 Total Dissolved Solids m /I 500 631.46 753.09 543.80 This water quality data represents key water quality indicators and by no means represents all the possible contaminants that could be in the surface water. This available data, however, does provide us with the ability to decide if surface water augmentation from Lake Jesup is feasible. We believe that these parameters indicate that Lake Jesup water can be used as an augmentation source and that they may supply the needs of the City without adverse affects on the reclaimed water system. None of these known parameters are at consistent high level concentrations that would cause any known effects on landscape plants or grasses. Many people utilize lake and storm waters for landscape irrigation without any treatment. This water should substitute directly for reclaimed water. Lake Jesup is not a typical source of surface water. Water quality parameters tend to be on the higher side of concentrations and are bumping up against the concentrations that cause agricultural concerns. Generally, chloride buildup in the soil may have an adverse effect on plants. The literature indicates that chlorides less than 500 mg/I and TDS less than 1000 mg/I will not have an adverse effect on plants. In addition, this water will be blended with effluent from the Water Reclamation Facilities. The annual average values are within normal tolerant ranges. 4.4 Reclaimed Storage The recommended storage capacity is four (4) million gallons and is equivalent to one day's flow rate. The storage will be matched to the flow rate by two phases. Each phase will include a two (2) million gallon storage tank. Storage allows the treatment facilities to operate over a 24-hour period and the distribution system to operate over a demand period of shorter duration. Current water conservation regulations do not allow irrigation between the hours of 10 A.M. to 4 P.M. and only twice per week. This is the even/odd cycle. This leaves too many days unused and an inefficient way of sizing equipment because there are three days left over in every week. Irrigation is allowed over 10 hours, but many households like to water in the morning hours; typically before 9 A.M. and after 1 A.M. (an eight-hour City of Winter Springs—Reclaimed Water Augmentation Study Page No. 4- 11 window). New rules are proposed that may revise current regulations especially concerning the days of allowable irrigation. The goal of the City would be to have the demand spread evenly over the longest cycle. Irrigation of reclaimed water (including supplementation) is allowed 24 hours per day provided there is a sign on the property indicating that reclaimed water is being used. 4.5 Site Plan Figure 4.2 shows a preliminary site plan for an equipment building, filtration, transfer pump station, access driveway, two (2)two-million gallon storage tanks and five (5) distribution pumps (can turbines). Chlorination, if required, will be fed directly into the ground storage tanks. As described elsewhere in this report, the improvements will be constructed in two phases. City of Winter Springs—Reclaimed Water Augmentation Study Page No. 5-1 SECTION 5 SYSTEM EXPANSION 5.0 System Expansion As discussed in Section 4, the expansion of the system to supply reclaimed or alternate source water throughout the City was divided into ten Phases. This Section will discuss the necessary facility improvements and the necessary infrastructure (piping) improvements. These improvements will be correlated to each other to provide a cohesive picture of how the system will develop through the Phases. 5.1 Treatment System Expansion The withdrawal and treatment of surface water from Lake Jesup can be implemented in Phases according to the amount of augmentation water required. Based on data obtained from the City, the system currently would benefit from augmentation water. After completion of the seven distribution system expansion Phases, the ultimate projected augmentation quantity is 2.25 MGD AADF. Two 1.125 MGD Treatment Phases are proposed to meet the needs of the City as further described below. To withdraw augmentation water from Lake Jesup and put it in the reclaimed water distribution system requires treatment as described in Section 4.2.2. Most of the augmentation will occur during the dry season, therefore the augmentation facility must be designed based on the treatment levels in Table 5-1. Table 5-1. Lake Jesup Water Quality Data / Removal Criteria Required Pre- Treatment % Removal Parameter Units Levels Levels Field PH N/A 9.4 Total Suspended Solids mg/I 5 65 92.4 Chloride mg/I N/A 338 Sulfate mg/I N/A 81 Total Dissolved Solids m /I N/A 753 The Lake Jesup water will have to be treated to public access and high-level disinfection standards, requiring filtration and disinfection. The augmentation facility will need the following components: surface water withdrawal pumping station; coagulation; filtration system; disinfection system; and distribution pumping station. City of Winter Springs—Reclaimed Water Augmentation Study Page No. 5-2 Phase A The first Phase of the augmentation system will have a capacity of 1.125 MGD AADF. The augmentation site will be located in Central Winds Park as shown in Figure 2-1 and will consist of the following components: 1 . Surface water withdrawal pumping station. The pumping station will be designed to withdraw 1.125 MGD AADF from Lake Jesup. The suction piping can be laid horizontally into the Lake. Measures should be provided to prevent clogging by fish, algae growth, etc. of the suction/inlet pipe. 2. The surface water shall be filtered to meet reuse requirements as specified by the Florida Department of Environmental Protection. 3. The disinfection system must meet high-level disinfection criteria as required by FDEP. We believe this can be met by the wet wells and storage system. Phase A would have a capacity of 1.125 MGD AADF and is estimated to cost approximately $2,646,420, as detailed in Table 5-2. Table 5-2. Treatment Facility Costs ITEM Total Cost Mobilization/Site work (5%) $100,000 Low Service Supply Pump (3 $75,000 pumps) Coagulation Chemical Feed $50,000 Filtration $250,000 Wetwells /Tanks $200,000 Disinfection System $50,000 Artesian Well Pump Station $75,000 Artesian Supply Line $171,000 Electrical/Control Building $30,000 SCADA $25,000 Electrical $105,000 Storage — 2.0 MG $750,000 Distribution Pump Station (3 $150,000 can pumps) Residual Backwash Pump $75,000 Station Contingency (10%) $200,000 Design/Survey (7%) $140,420 Legal/Administrative/etc.(5%) $100,000 Construction Administration $100,000 (5%) TOTAL $2,646,420 City of Winter Springs—Reclaimed Water Augmentation Study Page No. 5-3 Phase B Phase B should be constructed as a duplicate parallel facility to Phase A, as shown in Figure 4-2. Several items do not require duplication. The costs are estimated to be $1,610,400 and are shown in Table 5-3 with no increase due to inflation. Table 5-3. Treatment Facility Costs ITEM Total Cost Mobilization/Site work (5%) $61,000 Low Service Supply Pump (2 $50,000 pumps) Filtration $250,000 SCADA $15,000 Electrical $55,000 Storage — 2.0 MG $750,000 Distribution Pump Station (2 $100,000 can pumps) Contingency (10%) $122,000 Design/Survey (7%) $85,400 Legal/Administrative/etc.(5%) $61,000 Construction Administration $61,000 (5%) TOTAL $1,610,400 5.2 Distribution System Expansion Table 5-4 lists the proposed expansion Phases and the projected demand of each Phase. The following analysis assumes that connection will not be mandatory and 80% of the connections will be made and reclaimed water will actually be used at the projected rate. The cost of constructing additional distribution systems is based on an average of $2500 per connection and includes piping, restoration and services and meters. Table 5-4. Distribution System Expansion Phases Year Phase Potential Percent Connections Peak Average Cumulative Connec- Connected Demand Demand Demand tions (MGD) (MGD) (MGD) Existing 2.400 1.800 1.800 2008 1 1024 80 819 0.737 0.491 2.291 2010 2 1001 80 800 0.720 0.480 2.771 2012 3 1029 80 823 0.741 0.494 3.265 2014 4 1021 80 817 0.735 0.490 3.755 2016 5 1029 80 823 0.741 0.494 4.249 2018 6 946 80 757 0.681 0.454 4.703 2020 7 622 80 498 0.448 0.299 5.000 TOTAL 6672 5338 5.660 4.530 5.000 City of Winter Springs-Reclaimed Water Augmentation Study Page No. 5-4 Phase A of the augmentation treatment plant will last through the end Phase 3 (WRF flow 2.3 MGD and augmentation flow of 1.125 MGD equals 3.425 MGD) of the distribution system expansion. In 2012, Phase B of the augmentation facilities would be constructed. Phase 1 This Phase will be constructed to meet the demand created by 1024 residential lots. The total demand is estimated to be an average of 491 ,520 gallons per day. Table 5-5 lists the developments included in this Phase and the seasonal demands. In coordination of the construction of Phase 1 of the distribution system, Phase A of the Lake Jesup Augmentation Facility should be constructed. Table 5-5. Phase 1 -Capacity Data (80% Connected) SUBDIVISION Total Average Dry Wet Average Dry Wet NAME Lots Flow/ Season Season Flow Season Season Unit Flow/ Flow/ (gpd) Flow Flow (gpd) Unit Unit (gpd) (gpd) (gpd) (gpd) Arbor Glen (Tusc. 38 600 900 300 22,800 34,200 11,400 Parcel 90) Carrington 76 600 900 300 45,600 68,400 22,800 Woods Chestnut Estates 49 600 900 300 29,400 44,100 14,700 Davenport Glen 70 600 900 300 42,000 63,000 21,000 Glen Eagle 257 600 900 300 154,200 231,300 77,100 Highlands Sec. 3 26 600 900 300 15,600 23,400 7,800 Highlands Section 58 600 900 300 34,800 52,200 17,400 7-8 North Orlando 155 600 900 300 93,000 139,500 46,500 Terrace Sec 3-5 Oak Forest Unit 4 75 600 900 300 45,000 67,500 22,500 Oak Forest Unit 5 94 600 900 300 56,400 84,600 28,200 Tuskawilla Unit 87 600 900 300 52,200 78,300 26,100 12/12A Tuskawilla Unit 39 600 900 300 23,400 35,100 11,700 13 Total 1024 614,400 921,600 307,200 80% factor 819 491,520 737,280 245,760 The cost of this Phase is estimated to be $2,047,500. City of Winter Springs-Reclaimed Water Augmentation Study Page No. 5-5 Phase 2 This Phase will be constructed to meet the demand created by 800 residential lots. The total demand is estimated to be an average of 480,000 gallons per day. Table 5-6 lists the developments included in this Phase and the seasonal demands. Table 5-6 Phase 2-Capacity Data (80% Connected) SUBDIVISION Total Average Dry Wet Average Dry Wet NAME Units Flow/ Season Season Flow Season Season Unit Flow/ Flow/ (gpd) Flow Flow (gpd) Unit Unit (gpd) (gpd) (gpd) (gpd) Chelsea Woods- 135 600 900 300 81,000 121,500 40,500 South Highlands 131 600 900 300 78,600 117,900 39,300 Sections 4-5 North Orlando 1st 95 600 900 300 57,000 85,500 28,500 Addition North Orlando 123 600 900 300 73,800 110,700 36,900 Terrace Sec 8-9 Unit 2 Oak Forest Unit 3 114 600 900 300 68,400 102,600 34,200 Oak Forest Unit 8 131 600 900 300 78,600 117,900 39,300 Tuscawilla Unit 72 600 900 300 43,200 64,800 21,600 11A/11B Tuscawilla Unit 8 78 600 900 300 46,800 70,200 23,400 Wildwood- East 122 600 900 300 73,200 109,800 36,600 Total 1001 600,600 900,900 300,300 80% factor 800 1 480,000 720,000 240,000 The infrastructure cost of this Phase is estimated to be $2,000,000. City of Winter Springs-Reclaimed Water Augmentation Study Page No. 5-6 Phase 3 This Phase will be constructed to meet the demand created by 823 residential lots. The total demand is estimated to be an average of 617,400 gallons per day. Table 5-7 lists the developments included in this Phase and the seasonal demands. Table 5-7 Phase 3-Capacity Data (80% Connected) SUBDIVISIONS Total Average Dry Wet Average Dry Wet Units Flow/ Season Season Flow Season Season Unit Flow/ Flow/ (gpd) Flow Flow (gpd) Unit Unit (gpd) (gpd) (gpd) (gpd) Bear Creek Estates 67 600 900 300 40,200 60,300 20,100 Foxmoor Unit 1 81 600 900 300 48,600 72,900 24,300 Highlands Section 1 117 600 900 300 70,200 105,300 35,100 North Orlando 113 600 900 300 67,800 101,700 33,900 North Orlando 74 44,400 66,600 22,200 Terraces Unit 3 North Orlando 48 600 900 300 28,800 43,200 14,400 Terraces Unit 6 Oak Forest Unit 6 154 600 900 300 92,400 138,600 46,200 Oak Forest Unit 7 93 600 900 300 55,800 83,700 27,900 Tuscawilla Unit 11 28 600 900 300 16,800 25,200 8,400 Tuscawilla Unit 6 90 600 900 300 54,000 81,000 27,00 Tuscawilla Unit 88 600 900 300 52,800 79,200 26,400 MA Tuscawilla Unit 9B 76 600 900 300 45,600 68,400 22,800 Total 1029 617,400 926,100 308,700 80% factor 1 823 1 1 1 1 493,920 1 740,880 1 2461960 The infrastructure cost of this Phase is estimated to be $2,057,500. City of Winter Springs-Reclaimed Water Augmentation Study Page No. 5-7 Phase 4 This Phase will be constructed to meet the demand created by 817 residential lots. The total demand is estimated to be an average of 490,080 gallons per day. Table 5-8 lists the developments included in this Phase and the seasonal demands. In coordination of the construction of Phase 4, construction of Phase B of the Lake Jesup Augmentation Facility is necessary and construction will start during the prior year. Table 5-8 Phase 4-Capacity Data (80% Connected) SUBDIVISIONS Total Average Dry Wet Average Dry Wet Units Flow/ Season Season Flow Season Season Unit Flow/ Flow/ (gpd) Flow Flow (gpd) Unit Unit (gpd) (gpd) (gpd) (gpd) Arrowhead Unit 1 6 600 900 300 3,600 5,400 900 (Northern Way Bentley Green/Club 66 600 900 300 39,600 59,400 19,800 Chestnut Ridge 52 600 900 300 31,200 46,800 15,600 Fairway Oaks 72 600 900 300 43,200 64,800 21,600 Foxmoor East 35 600 900 300 21,000 31,500 10,500 Foxmoor Units 2-3 190 600 900 300 114,000 171,000 57,000 Jackson Circle 10 600 900 300 6,000 9,000 3,000 Oak Forest Units 163 600 900 300 97,800 146,700 48,900 2/2A2B St Johns Landing 31 600 900 300 18,600 27,900 9,300 The Reserve at 92 600 900 300 55,200 82,900 27,600 Tuscawilla Ph 1-2 Tuscawilla Trace 24 600 900 300 14,400 21,600 7,200 Tuscawilla Unit 7 79 600 900 300 47,400 71,100 23,700 Walden Terrace 63 600 900 300 37,800 56,700 18,900 Winter Springs 138 600 900 300 82,800 124,200 41,400 Unit 4- East Total 1021 612,600 918,900 305,400 80% factor 817 490,080 735,120 244,320 The infrastructure cost of this Phase is estimated to be $2,042,500. City of Winter Springs—Reclaimed Water Augmentation Study Page No. 5-8 Phase 5 This Phase will be constructed to meet the demand created by 823 residential lots. The total demand is estimated to be an average of 479,520 gallons per day. Table 5-9 lists the developments included in this Phase and the seasonal demands. Table 5-9 Phase 5—Capacity Data (80% Connected) SUBDIVISIONS Total Average Dry Wet Average Dry Wet Units Flow/ Season Season Flow Season Season Unit Flow/ Flow/ (gpd) Flow Flow (gpd) Unit Unit (gpd) (gpd) (gpd) (gpd) North Orlando 2nd 165 600 900 300 81,000 148,500 49,500 Addition North Orlando 291 600 900 300 174,600 261,900 87,300 Ranches 8-10 Oak Forest Unit 1 114 600 900 300 68,400 102,600 34,200 Wicklow Greens 48 600 900 300 28,800 43,200 14,400 Winter Springs 383 600 900 300 229,800 344,700 114,900 Unit 4—West Woodstream 28 600 900 300 16,800 25,200 8,400 Total 1029 599,400 926,100 308,700 80% factor 1 823 1 1 1 479,520 1 740,880 1 246,960 The infrastructure cost of this Phase is estimated to be $2,057,500. City of Winter Springs—Reclaimed Water Augmentation Study Page No. 5-9 Phase 6 This Phase will be constructed to meet the demand created by an estimated 80% of the 757 residential lots. The total demand is estimated to be an average of 195,200 gallons per day. Table 5-10 lists the developments included in this Phase and the seasonal demands. Table 5-10 Phase 6—Capacity Data (80% Connected) SUBDIVISIONS Total Average Dry Wet Average Dry Wet Units Flow/ Season Season Flow Season Season Unit Flow/ Flow/ (gpd) Flow Flow (gpd) Unit Unit (gpd) (gpd) (gpd) (gpd) Mt Greenwood 73 600 900 300 43,800 65,700 21,900 Unit 1 Mt Greenwood 150 600 900 300 93,600 140,400 46,800 Unit 5 North Orlando 218 600 900 300 130,800 196,200 65,400 41"Addition North Orlando 22 600 900 300 13,200 19,800 6,600 Ranches Sec 1 Bahama North Orlando 221 600 900 300 132,600 198,900 66,300 Ranches Sec 2/2A North Orlando 60 600 900 300 36,000 54,000 18,000 Ranches Sec 3- 5 Winter Springs 202 600 900 300 121,200 181,800 60,600 Units 2-3 Total 946 571,200 856,800 285,600 80% factor 757 456,960 685,440 228,480 The infrastructure cost of this Phase is estimated to be $1,892,500. City of Winter Springs—Reclaimed Water Augmentation Study Page No. 5-10 Phase 7 This Phase will be constructed to meet the demand created by 498 residential lots. The total demand is estimated to be an average of 298,560 gallons per day. Table 5-11 lists the developments included in this Phase and the seasonal demands. Table 5-11. Phase 7—Capacity Data (80% Connected) SUBDIVISIONS Total Average Dry Wet Average Dry Wet Units Flow/ Season Season Flow Season Season Unit Flow/ Flow/ (gpd) Flow Flow (gpd) Unit Unit (gpd) (gpd) (gpd) (gpd) Dunmar 20 600 900 300 12,000 18,000 6,000 North Orlando 115 600 900 300 69,000 103,500 34,500 Ranches Sec 1/1AMB North Orlando 84 600 900 300 50,400 75,600 25,200 Ranches Sec 6-7 Parkstone 396 600 900 300 237,600 356,400 118,800 Tuscawilla Unit 5 7 600 900 300 4,200 6,300 2,100 Total 622 373,200 559800 186,600 80% factor 498 298,560 447:840 149,280 The infrastructure cost of this Phase is estimated to be $1,245,000. City of Winter Springs-Reclaimed Water Augmentation Study Page No. 5-11 Table 5-12 is a compilation of the data of Sections 3, 4 and 5, showing the available effluent, projected demand (ADF and Peak)and the augmentation required to meet the demands. The projected demands for irrigation water includes an existing value of 1 .8 MGD AADF and 2.4 MGD dry season demand for existing residential customers, the two golf courses and the Central Winds Park demands. Table 5-12. Augmentation Needs Year Irrigation Lake Effluent Average Augmentation Peak Augmentation Ending Phase Jesup Available Reclaim Needed Reclaim Needed September Phase Needed (Average) Needed (Dry Season) 30 2005 2.32 1.8 N/A 2.4 N/A 2006 2.35 1.8 N/A 2.4 N/A 2007 A 2.37 1.8 N/A 2.4 N/A 2008 1 2.40 2.29 0 3.14 0.74 2009 2.43 2.29 0 3.14 0.71 2010 2 2.46 2.77 0.31 3.86 1.40 2011 2.49 2.77 0.28 3.86 1.37 2012 3 2.52 3.27 0.75 4.60 2.08 2013 B 2.55 3.27 0.72 4.60 2.05 2014 4 2.58 3.76 1.18 5.33 2.75 2015 2.61 3.76 1.15 5.33 2.72 2016 5 2.64 4.25 1.61 6.07 3.43 2017 2.68 4.25 1.57 6.07 3.39 2018 6 2.71 4.70 1.99 6.75 4.04 2019 2.74 4.70 1.96 6.75 4.01 2020 7 2.77 5.00 2.23 7.20 4.43 City of Winter Springs—Reclaimed Water Augmentation Study Page No. 6-1 SECTION 6 PERMITTING 6.0 FDEP The FDEP is responsible for permitting the use of the treated lake water as a supplemental source for use within the reclaimed water system. FDEP will review the process equipment and design and check for compliance with the provisions of the Reclaim Water Rules. We must go through this process because we are blending the lake water with reclaim water from two treatment facilities. FDEP will be concerned with the water quality and that the supplemental water use will not cause a violation of the wastewater permits. 6.1 SJRWMD A Consumptive Use Permit is required from SJRWMD. They will evaluate the proposed volume of water being withdrawn from the lake and determine the acceptable amount by permit. They will also look at the secondary effects of reducing the water flow in Lake Jesup and the effects of withdrawal during low seasonal flows. We recommend a preliminary meeting with SJRWMD to discuss this report and the future plans of the City. We need to develop a dialogue with the District and have both parties work toward a positive goal of reducing groundwater demand and increasing lower quality water for irrigation. We also recommend involvement of the public at a very early stage in this process. City of Winter Springs—Reclaimed Water Augmentation Study Page No. 7-1 SECTION 7 CONCLUSIONS AND RECOMMENDATIONS 7.0 Conclusions and Recommendations The project is feasible and would provide the City with a secondary source of water. The project would reduce groundwater withdrawals, thereby providing good potable groundwater in the future. We recommend that the City pursue the following: 1) Discussion with SJRWMD on the project and coordination with "The Friends of Lake Jesup". 2) Proceed with an application of a Consumptive Use Permit. 3) Upon approval, proceed with pilot testing of the recommended treatment options. 4) Proceed with a design with known data from pilot testing. 5) Proceed with design(s) to expand the reclaimed distribution system.