POLK COUNTY COMPREHENSIVE WATER SUPPLY PLAN FINAL PCU-SWRUSA. Prepared For: Polk County, FL

Transcription

1 POLK COUNTY COMPREHENSIVE WATER SUPPLY PLAN FINAL PCU-SWRUSA Prepared For: Polk County, FL Prepared By: Reiss Engineering 21 3 rd st NW Winter Haven, Florida REI Project No July 2009

2 TABLE OF CONTENTS 1.0 PCU-SWRUSA Introduction Background Inventory of Public Water Supply Facilities Potable Water Infrastructure Reclaimed Water Infrastructure Population and Water Demand Projections Future Water Supply Plans Options for Additional Water Supply Local Sources Conservation Reclaimed Water Surface Water Groundwater Regional Sources Tampa Bay Water Peace River Implementation Considerations Sample Implementation Plan i

3 TABLES Table 1-1: PCU-SWRUSA Potable Water Supply Facilities... 5 Table 1-2: PCU-SWRUSA Wastewater Treatment Facilities and Reuse... 6 Table 1-3 SWFWMD: PCU-SWRUSA Population and Water Demand Projections... 7 Table 1-4: PCU-SWRUSA Wastewater and Reclaimed Flow Projections... 8 Table 1-5: Local Water Supply Options Table 1-6: Conservation Analysis Options Table 1-7: Conservation Analysis Sample Programs Table 1-8: Agricultural Well Permitted and Pumped Quantities Table 1-9: Regional Water Supply Options ii

4 FIGURES Figure 1-1: Water Management Districts in Polk County... 2 Figure 1-2: SWRUSA Service Area... 4 Figure 1-3: Supply and Demand Curve... 7 Figure 1-4: SWRUSA Land Use Transition Map Figure 1-5: Conceptual Implementation Plan iii

5 1.0 PCU-SWRUSA 1.1 Introduction One of Polk County s, and its local governments primary goals is to provide safe, reliable, and sustainable water, wastewater, and reclaimed water service to their existing and future customers. Historically, Polk County and the 17 local governments have provided potable water for both domestic use and irrigation, by drawing their water supply from Upper Floridan aquifer (UFA) groundwater wells. However, it is anticipated that public water demands in Polk County will increase significantly in the next 20 to 30 years. Furthermore, the Florida Legislature requires water supply planning where traditional sources of water are not adequate for the planning period to supply water for all reasonable-beneficial uses and to sustain the water resources and related natural systems ( (1), Florida Statutes (F.S.)). This Statute is reinforced by the regional water supply plans published by the South Florida Water Management District (SFWMD) and Southwest Florida Water Management District (SWFWMD). In general, the WMDs have jointly concluded that the traditional groundwater sources in Central Florida are not sustainable at projected demand levels and, as such, will not be able to provide sufficient quantities to meet future demands. Therefore, there is an immediate need to investigate, develop and implement alternative and supplemental water supplies; as well as continue aggressive conservation measures and the use of reclaimed water. Alternative water supply sources are applicable within the SWUCA, and are defined as saltwater; brackish surface and ground water; surface water captured predominantly during wet-weather flows; sources made available through the addition of new storage capacity for surface or ground water; water that has been reclaimed after one or more public supply, municipal, industrial, commercial, or agricultural uses; the downstream augmentation of water bodies with reclaimed water; stormwater; and any other water supply source that is designated as non-traditional for a water supply planning region in the applicable regional water supply plan. (SWFWMD Form, 2007) CFCA definitions allocate supplemental water supplies as surface water, stormwater, saltwater, and brackish groundwater if it can be developed without causing harmful impacts from cumulative groundwater withdrawals. (SFWMD, et. al. 2007) The WMDs are limiting groundwater allocation in the CFCA to a level equivalent to meet the projected 2013 demands, and thus are setting the time frame necessary to implement supplemental water supply projects to meet future demands. It is important to note for those portions of Polk County that fall within the SWUCA, previously established permitting rules supersede those developed for the current CFCA rules. A figure illustrating the SWUCA and CFCA within Polk County is shown in Figure

6 Figure 1-1: Water Management Districts in Polk County Based on the growing potable water demand, and the current surface water recovery strategies being implemented to recover MFLs within Polk County, the development of a plan for identifying and developing future water sources must address many constraints and overcome both technical and political challenges. Given these numerous and conflicting controls, the water supply planning effort will be complex, involving multiple elements ranging from water quality, water treatability, cost-effectiveness, and protection of the environment to inter-district coordination, cooperative regional water supply alternatives, and permitting challenges. To meet these needs, Polk County, in a cooperative effort with both the Southwest Florida Water Management District and the South Florida Water Management District has been developing a comprehensive Water Supply Plan to identify and quantify viable additional public water supply sources, particularly alternative water supply sources, as needed to meet the future potable water and non-potable water needs of various public utility systems within Polk County. This process has included investigation of multiple water resources including ground water, surface water, reclaimed water, storm water and other means of providing adequate water services to future residents within Polk County. The process of exploring alternative water supplies was developed to recognize and to develop strategies to overcome the various technical, economic, environmental, jurisdictional and regulatory factors that may impact development of these new sources. This water supply planning effort first included the identification, quantification and confirmation of the types and quantities of new water supply that can be developed, and then addresses aligning the sources with prospective water supply partners. The final product is a list of water supply alternatives, and a comprehensive plan for the adequate and sustainable provision of water supply over the course of the planning period. The PCU-SWRUSA, as one of the 17 local governments, was specifically analyzed as part of the overall water supply planning 2

7 efforts. This section addresses general as well as specific options for which the PCU-SWRUSA could potentially implement as needed to meet their future water supply needs. 1.2 Background Polk County Utilities Southwest Regional Utilities Service Area (PCU-SWRUSA) is located in the southwest-central portion of Polk County about 9 miles south of Lakeland and 38 miles east of Tampa with a total population of 33,994 residents (SWFWMD 2007 Public Supply Per Capita Water Use Survey). The SWRUSA is located within the Southwest Florida Water Management District (SWFWMD) and the Southern Water Use Caution Area (SWUCA). SWRUSA is bordered by Mulberry, Lakeland and Bartow (refer to Figure 1-2) Inventory of Public Water Supply Facilities PCU-SWRUSA (County) currently operates potable water, wastewater and reclaimed water systems, which consist of six water treatment facilities, one wastewater treatment facilities and associated collection, transmission and distribution infrastructure Potable Water Infrastructure The utility area s current potable water supply is traditional groundwater withdrawn from the Floridan aquifer through seven wells, and treated at the six water treatment facilities (Table 1-1). Independent storage and high-service pumping facilities are utilized at the City s water treatment plants. Withdrawal from the Floridan aquifer is limited by the Southwest Regional Utility Serve Area s water use permit (WUP) issued by SWFWMD. The current water use permit, which allows the utility area to pump MGD on an annual average daily demand (AADD) basis, and MGD for the maximum month, will expire on May 26, PCU is currently in the process of renewing their WUP. According to Polk County Utilities, water use in the Southwest Regional Utility Service Area can be characterized as 93.8% residential, 4.2% industrial/commercial, 0.2% fire flow and other accounted for uses, with 2% of unaccounted for water use. 3

8 ² LEGEND PCU-SWRUSA Service Areas Polk County Line! 1, Haskell Homes WTP! 2, Valley View WTP! 3, Imperial Lakes WTP! 4, Pine Lake WTP! 5, Turner Road WTP! 6, Gus Stewart WTP! 7, Southwest Regional WWTP! «6!! «1! «4! «3! «5! «7 Polk County Comprehensive Water Supply Plan PCU-SWRUSA Service Area FIGURE

9 Table 1-1: PCU-SWRUSA Potable Water Supply Facilities Treatment Plant Design Capacity (MGD) Maximum Month Demand (MGD) Average Daily Demand (AADD-MGD) Facility Name Gus Stewart WTP Imperial Lakes WTP Turner Road WTP Valley View WTP Pine Lake WTP Haskell Homes WTP *2006 Water Treatment Facilities Data. The Polk County Utilities Southwest Regional Utilities Service Area has a potable and reclaimed water interconnection with Lakeland. The County also plans to interconnect the reclaimed water system in several other locations to better serve residents (SWFWMD 2007 Public Supply Per Capita Water Use Survey). The direction of flow of the reclaimed water is from Polk County Utilities to Lakeland and the potable water flow is both ways for redundancy in the event of emergency conditions Reclaimed Water Infrastructure The Southwest Regional Utilities Service Area wastewater system consists of a collection system, lift stations and transmission mains, as well as one wastewater treatment facility (WWTF), of which provides treated wastewater effluent for reuse. The County area wastewater treatment effluent disposal capacities include: 0.97 MGD Public Access Irrigation 0.63 MGD Golf Course Irrigation 1.13 MGD Restoration treatment and disposal wetlands 0.40 MGD Other Public Access Areas The Southwest Regional WWTF utilizes 1.00 MGD of treated wastewater effluent for public access reuse for irrigation purposes, residential irrigation and other public access irrigation. A summary of the Southwest Area s wastewater treatment facilities and reuse applications is shown in Table

10 Table 1-2: PCU-SWRUSA Wastewater Treatment Facilities and Reuse WWTF Name Southwest Regional WWTF Permitted WWTF Capacity (MGD) Actual WWTF Flow (MGD) Disposal (MGD) Reclaimed Water Utilization (MGD) 0.33 Public Supply Irrigation; 0.08 Golf Course Irrigation; 0.59 Other Public Access Areas Note: Information based on the SWFWMD Revisions to "FDEP Reuse Inventory" 2006 Public Supply Offset (MGD) Private Supply Offset (MGD) Population and Water Demand Projections The Southwest Regional Utilities Service Area currently has a population of approximately 33,994 residents and despite the recent slowing of the housing market; the County anticipates an increase in population growth for the service area over the 2030 planning period. The projected population and water estimates are provided in Table 1-3. The projected quantities were identified by Polk County Utilities in cooperation with the SWFWMD GIS population model and are shown in Attachment 1. 6

11 Table 1-3 SWFWMD: PCU-SWRUSA Population and Water Demand Projections Year Service Area Population Permitted AADD Withdrawal (MGD) Water Demand AADD Projections (MGD) Water Supply Deficit (-) or Surplus (MGD) , , , , , , *Actual 2007 Service Area Population and actual Water Demand / Withdrawals as provided by Polk County Utilities to the SWFWMD in the 2007 Public Supply Per Capita Water Use Survey. **SWFWMD Permitted AADD Withdrawal from 2010 to ***From SWFWMD Population & Water Demand Projections (2009 PCCWSP, Appendix C) PCU-SWRUSA Annual Average Demand Water Supply Needs Exceed 2.0 Current Permitted Supply Time (yr) Water Demand/Need Current Permitted Water Supply Figure 1-3: Supply and Demand Curve Polk County Utilities Southwest Regional Utilities Service Area s average daily flow of raw water pumpage, which excludes imports, exports, and treatment losses, was MGD in 2007 which leaves MGD of additional flow. SWRUSA s current permitted capacity of

12 MGD and the projected 2030 water demands show the utility service area is in a deficit of potable water supply of MGD. Based on the population increase projections, the wastewater flow projections were calculated to predict future reclaimed water supplies available for potential public supply offsets (Table 1-4). The available wastewater flow for reuse per year is found by subtracting the reclaimed water utilization from the projected wastewater flows. The projected available reuse flows can be used to offset a utility s future water supply needs, unless the flows have already been reserved. Polk County currently utilizes 1.00 MGD of reclaimed water and plans on utilizing an additional 0.70 MGD of reclaimed water for public access irrigation. Polk County also plans to send any additional reclaimed water to the City of Lakeland Wetland to be sent to the TECO power generation facility for cooling water, leaving no available reclaimed water for reuse through the 2030 planning period. Planned water supply projects have been addressed for further capacity for the service area within this plan. Table 1-4: PCU-SWRUSA Wastewater and Reclaimed Flow Projections Year Service Area Population Projected Wastewater Flow (MGD) Available Wastewater Flow for Reuse (MGD) , , , , , , Note: The projected wastewater flow is found by multiplying the population by 84 gpd; 84 gpd estimates includes a variety of data including the following. A. The national average residential wastewater flow per person is 69.3 gpd (Handbook of Water Use and Conservation by Amy Vickers, 2001). B. Business and industry (ICI) wastewater inputs vary by locale. Note: The Available Wastewater Flow for Reuse is found by subtracting a utilities 2006 reclaimed water utilization (MGD) and planned reclaimed water projects (MGD) from the Projected Wastewater Flow (MGD) (SWFWMD, "2006 Northern SWUCA Reclaimed Information") Note: This assumes only future developments to be on served by centralized sewer (no sewer retrofits for septic) Note: Available Wastewater Flow quantities were provided by PCU and will be affirmed by the SWFWMD prior to the renewal or modification of the water use permit Future Water Supply Plans Historically, Polk County Utilities has provided potable water for both domestic as well as for consumed use and irrigation, drawing its water supply from groundwater wells located in and around the six regional utility service areas. PCU has been committed in development of alternative water sources and non-traditional groundwater supplies for their long term needs. After review of growth data and the demands in each service area, Polk County projected water supply needs in four of the six utility service areas. The areas that do not have sufficient supply to meet the 2030 water supply demands include the NERUSA, NWRUSA, SERUSA, and SWRUSA. The deficits in the NERUSA and SWRUSA may require additional attention since 8

13 these two service areas represent 60% of the total water customers for PCU and these two areas are the fastest growing service areas. In the Southwest Regional Utility Service Area, the County plans to make upgrades to the Imperial Lakes, Gus Stewart and Turner Road water treatment plants in The Haskell Homes water plant is planned to be decommission in A new water treatment plant with treatment capacity of 5.5 MGD is scheduled for planning and design in In addition to the water plant improvements and new water treatment plant design, construction upgrades to the transmission and distribution system will be made concurrently. The County is actively pursuing water conservation programs including providing water conservation retrofit kits with low flow showerheads, faucet aerators, leak detection tablets and other water conserving devices. The County also is enforcing building codes and water restrictions; requiring low water use fixtures and specific times for residents to irrigate. Other conservation programs include; rain and soil moisture sensor rebates, water conserving toilet rebates, pre-rinse spray valve replacements, education and public awareness, residential and commercial audit program, reduction of unaccounted for water through installation of automatic meter readers and an aggressive 6 tiered water rate structure. The County currently abides by the watering restrictions set forth by the SWFWMD and enforces these restrictions through the code enforcement/police department as well as a full time irrigation officer. The County has also focused on reclaimed water expansion and the construction of additional reclaimed water storage tanks to increase the use of reclaimed water for conservation and restoration purposes. Polk County Utilities requires all new developments to install reclaimed water distribution lines within the development, in which existing or planned County reclaimed water lines exist. Polk County is also actively pursuing a joint reclaimed water project with the City of Lakeland in which treated wastewater effluent from the Southwest Regional Utilities and Lakeland service areas will be transferred to the TECO Energy facility in southeast Polk County 1.3 Options for Additional Water Supply Local Sources As noted above, the PCU-SWRUSA has a predicted water supply short-fall of approximately MGD in the year 2030 (SWFWMD, March 2009). For the PCU-SWRUSA to meet their water supply needs, implementation of new water supply options must begin prior to the year in which a deficit occurs. The following paragraphs discuss the various water supply options available to the PCU-SWRUSA (Table 1-5). These options have been identified as part of the 2009 PCCWSP and therefore do not include new permitted use for the UFA. The following water supply options will be discussed by category (conservation, reclaimed water, surface water, groundwater, regional water supply). 9

14 Table 1-5: Local Water Supply Options Polk County Southwest Regional Utility Service Area Current WUP Capacity mgd Projected 2030 Demand mgd Deficit (in 2030) mgd Optional Categories Estimated Quantity (mgd) Estimated Range (mgd) Estimated Costs $/ 1000 gal Conservation mgd $0.56 Reclaimed mgd $2.00 Land Use Transition mgd $1.07 Lower Floridan mgd $3.58 Regional Sources 6 Estimated Optional Categories Subtotal mgd Surplus/Deficit with Optional Categories (2030) mgd (1) Projections provided by SWFWMD (March 2009) (2) The range of water demand reduction quantities for conservation were estimated as part of the 2009 Polk County Comprehensive Water Supply Plan by utilizing a variety of programs with participation rates varying from 5% to 50%. The estimated water supply quantity, as shown in the table above, is based on an assumed overall participation rate of 23% (3) The range of water demand reduction quantities for reclaimed water were calculated using the SWFWMD Population Projections multiplied by 84 gpcd, estimated low range is 50% utilization of the estimated available wastewater for reclaimed water use, times, 50% efficiency. The upper range is 75% utilization of the available wastewater for reclaimed water use, times, 75% efficiency. The estimated water supply quantity, as shown in the table above, is based on the assumption that the projected increase in wastewater will be used to offset future potable water demands. The estimated quantity is the average between the estimated high and low range of utilization of available wastewater for reclaimed water use. The estimated quantity is based on 75% efficiency due to the SWFWMD's requirements for a 20 year permit. (4) The range of water supply quantities which may be available as a result of land use transitions was calculated using a range of 5% to 30% of the 10-year historical usage of agricultural, mining, industrial/commercial wells in the service area. The estimated quantity as shown in the table above is an assumed acreage conversion value of 15% which is based on historical trends. This land use transition process is only applicable for utilization of water from the Upper Floridan aquifer if mitigation is needed due to predicted adverse impacts. The estimated quantity and range include the unincorporated areas within the Polk County region. (5) The range of water supply quantities for Lower Floridan Blending was calculated using a range of 5% to 20% of the current permitted capacity and assumed Lower Floridan Aquifer quality. The estimated water supply quantity, as shown in the table above, was assumed to be 10% of the current permitted supply quantity for the service area. (6) Specific water supply quantities for regional sources have not been determined at this time. Refer to the text in subsection 5.4 related to regional water supply sources for overall project quantity estimates. 10

15 Conservation Projected growth and associated increased potable water demands have led to growing concerns about the sustainable use of treated groundwater resources in Florida, and have driven communities to focus on the potential and importance of conservation for water savings. Current efforts by a number of local governments pertaining to water conservation have generally centered on educating potable water customers on the efficient water use through various conservation methods or measures. While education based water conservation initiatives are an extremely important element of any conservation plan, quantifying the potable water savings directly due to public outreach efforts can be challenging. As such, communities must move well beyond education programs to implement measures which will cost-effectively improve reductions in water demands. The ability to quantify conserved water is critical when developing a comprehensive regional water supply plan. The objective of this portion of the Polk County Comprehensive Water Supply Plan was to identify potential, quantifiable impacts on potable water consumption for various water conservation methods if applied to the specific local governments located within Polk County. Prior to the detailed evaluation of potential conservation measures, several relevant studies were examined in detail, including: Southwest Florida Water Management District s Regional Water Supply Plan Tampa Bay Water - Compilation of Members Five Year Conservation Plans 2005 Heartland Water Alliance Phase I; II & III Water Supply Plan 2007 Polk County Local Governments Utilities Phase I & II County Wide Water Supply Plan. These studies aided the Polk County Comprehensive Water Supply Plan Team in developing a long list of conservation methods for further evaluation and consideration (2009 PCCWSP Appendix A). The long list consisted of many conservation approaches utilized by a wide range of utilities. From the long list of conservation items, several projects were selected to undergo more detailed analyses based on permittability, additional benefit, implementation time, cost effectiveness, water savings and the ability to quantify future savings. Potential conservation measures were evaluated for individual water savings potential and cost effectiveness, with the majority of projects implemented on a voluntary basis. The voluntary nature of these measures was addressed through the inclusion of individual participation factors, which were customized to the communities and the specific conservation program. From this evaluation, specific conservation measures for each local government s utility service area were selected for the detailed analysis. Through the efforts of this study, the estimated quantity of water savings for the PCU-SWRUSA could potentially be as much as MGD, based on an assumed average participation rate of 23 percent (SWFWMD, 2009). Apparently, if higher participation rates are achieved, additional water savings can be realized. 11

16 Polk County Comprehensive Water Supply Plan PCU-SWRUSA-Options Rebate/ Purchase cost per Water savings per year per No. of years Life of implemented No. accounts targeted 4 Potable Flow Savings (mgd) 5 Capital Cost ($) 6 Cost at Rated Capacity ($/Kgal) Conservation Program account 1 account 2 Measure % 50% 23% 5% 100% 50% 23% 5% 100% 50% 23% 5% 100% 50% 23% 5% Plumbing Retrofit Program A $30 4, ,010 4,005 1, $258,300 $132,150 $66,669 $23,015 $0.27 $0.27 $0.33 $0.37 ULV Toilets-SF A $100 9, ,837 3,419 1, $701,700 $353,850 $168,651 $45,185 $0.40 $0.40 $0.44 $0.46 ULV Toilets-MF A $100 9, , $129,300 $69,650 $34,979 $11,865 $0.41 $0.42 $0.52 $0.58 ULV Toilets-Non Res A $100 13, $49,100 $30,050 $16,763 $7,905 $0.33 $0.37 $0.58 $0.73 Dual-Flush Toilets-SF A $175 13, ,837 3,419 1, $1,214,475 $610,238 $286,589 $70,824 $0.48 $0.49 $0.51 $0.52 Dual-Flush Toilets-MF A $175 25, , $217,275 $113,638 $55,213 $16,264 $0.26 $0.27 $0.31 $0.33 Dual-Flush Toilets-Non Res A $175 21, $77,675 $44,338 $23,335 $9,334 $0.33 $0.35 $0.48 $0.57 Ultra Low Volume Urinals B $100 25, $26,639 $13,820 $9,597 $6,782 $0.54 $0.55 $1.36 $1.90 Waterless Urinals B $200 42, $42,278 $21,639 $13,194 $7,564 $0.56 $0.57 $1.05 $1.38 High Efficiency Clothes Washer-SF C $125 5, ,752 6,376 2, $1,612,031 $815,015 $380,427 $90,702 $2.15 $2.16 $2.24 $2.28 High EfficiencyClothes Washer-MF C $125 3, ,188 1, $285,541 $148,771 $74,314 $24,677 $3.30 $3.37 $4.05 $4.50 High EfficiencyClothes Washer-Non Res C $ , $8,509 $7,254 $6,577 $6,125 $0.36 $0.55 $2.62 $4.00 ICI Spray Valve Replacement D $75 98, $7,875 $6,938 $6,431 $6,094 $0.20 $0.32 $1.64 $2.51 ICI Assessments E $4, , $2,246,720 $1,128,860 $522,216 $117,786 $0.48 $0.49 $0.49 $0.50 Rain Sensor Shut-off Devices F $75 10, ,700 5,850 2, $895,517 $456,759 $215,629 $54,876 $0.72 $0.73 $0.77 $0.80 Soil Moisture Shut-off Devices F $125 10, ,700 5,850 2, $1,480,529 $749,264 $350,182 $84,126 $1.20 $1.20 $1.25 $1.28 Outdoor Water Conservation-Res G $300 77, ,343 5,671 2, $3,420,755 $1,719,377 $796,434 $181,138 $0.40 $0.40 $0.40 $0.41 Outdoor Water Conservation-Non Res G $ , $41,182 $21,091 $12,942 $7,509 $0.23 $0.23 $0.44 $0.58 Large Landscape Assessment H $ , $0 $0 $0 $0 $0.00 $0.00 $0.00 $ Rebate/Purchase cost per account may vary on the aggressivness of the program, costs per account are based on research and typical rebate amounts 2 Water savings per year per account from SWFWMD 2006 Regional Water Supply Plan, The Potable Water Conservation BMP's for Tampa Bay - Sept '04 (TBW), The Handbook of Water Conservation by Amy Vickers - Waterplow Press 3 No of years based on a typical water supply planning period of 20 years and the life of measure from manufacturer's recommendations 4 No. accounts targeted based on variable participation rates of 100% 50% & 5%; Estimations based on GIS parcel and housing information from the Polk County Property Appraiser; US Census Bureau; SWFWMD Public Water Supply Per Capita Water Use Survey ( A ) # of Accounts for Toilet Rebates and plumbing retrofit kits is based upon pre-1995 homes found using the Polk County Property Appraisers information and the 2007 SWFWMD Public Supply Per Capita Water Use Survey ( B ) # of Accounts for Waterless and ULV Urinals is based on the total number of commercial facilities based on the 2007 SWFWMD Public Supply Per Capita Water Use Survey ( C ) # of Accounts for High Efficiency Clothes Washers found using US Census bureau information;2007 SWFWMD Public Water Supply Per Capita Water Use Survey; Increase in population based on 2009 SWFWMD Population Estimations ( D ) # of Accounts for ICI spray valve replacements found from Polk County Property Appraisers parcel information and 2007 SWFWMD Public Water Supply Per Capita Water Use Survey; ( E ) # of Accounts for ICI Assessment based on total number of Industrial Commercial and Institutional facilities in a service area from the 2007 SWFWMD Public Water Supply Per Capita Water Use Survey; Increase in population based on 2009 SWFWMD Population Estimations ( F ) # of Accounts for Rain Sensor and Soil Moisture Sensor based on the total number of accounts for SF, MF, and Non-Res from the 2007 SWFWMD Public Water Supply Per Capita Water Use Survey; Increase in population based on 2009 SWFWMD Population Estimations; Percentage irrigating found using Polk County Property Appraiser Information and the Florida Water ( G ) # of Accounts for Outdoor Water Conservation SF, MF, and Non-Res from the 2007 SWFWMD Public Water Supply Per Capita Water Use Survey; Increase in population based on 2009 SWFWMD Population Estimations;Percentage irrigating found using Polk County Property Appraiser Information and the Florida Water Rates Evaluation of Single-Family Homes - July 13, ( H ) # of Accounts for Large Landscape Customers from the Agricultural Section of the 2007 SWFWMD Public Water Supply Per Capita Water Use Survey 5 Potable Flow Savings is calculated by multiplying # of participating accounts by the water savings rate per year 6 Equipment Fee, Research and Development, and training is based on " Development of Water Conservation Options for Non-Agricultural Water Users ", Southwest Florida Water Management District & Ayres Associates, August 2000;Each project was calculated seperatley by amoritizing at 8% interest for the life of the program (the total cost at a rated capacity used the total capital costs and savings amoritized over the average years implemented for all projects) R:\Projects\8501-Polk County Water Supply\Study-Report\Final_Report\Conservation\Appendices\Appendix B\PCU-SWRUSA Conservation Rebate Calculator

17 Polk County Comprehensive Water Supply Plan PCU-SWRUSA-Programs Rebate/ Purchase cost per Water savings per year per Life of No. of years implemented No. accounts targeted 4 Potable Flow Savings (mgd) 5 Capital Cost ($) 6 Cost at Rated Capacity ($/Kgal) Conservation Program account 1 account 2 Measure % 50% 23% 5% 100% 50% 23% 5% 100% 50% 23% 5% 100% 50% 23% 5% Plumbing Retrofit Program A $30 4, ,010 4,005 1, $258,300 $132,150 $66,669 $23,015 $0.27 $0.27 $0.33 $0.37 ULV Toilets-SF A $100 9, ,837 3,419 1, $701,700 $353,850 $168,651 $45,185 $0.40 $0.40 $0.44 $0.46 ULV Toilets-MF A $100 9, , $129,300 $69,650 $34,979 $11,865 $0.41 $0.42 $0.52 $0.58 ULV Toilets-Non Res A $100 13, $49,100 $30,050 $16,763 $7,905 $0.33 $0.37 $0.58 $0.73 Ultra Low Volume Urinals B $100 25, $26,639 $13,820 $9,597 $6,782 $0.54 $0.55 $1.36 $1.90 High Efficiency Clothes Washer-SF C $125 5, ,752 6,376 2, $1,612,031 $815,015 $380,427 $90,702 $2.15 $2.16 $2.24 $2.28 High EfficiencyClothes Washer-MF C $125 3, ,188 1, $285,541 $148,771 $74,314 $24,677 $3.30 $3.37 $4.05 $4.50 High EfficiencyClothes Washer-Non Res C $ , $8,509 $7,254 $6,577 $6,125 $0.36 $0.55 $2.62 $4.00 ICI Spray Valve Replacement D $75 98, $7,875 $6,938 $6,431 $6,094 $0.20 $0.32 $1.64 $2.51 Rain Sensor Shut-off Devices F $75 10, ,700 5,850 2, $895,517 $456,759 $215,629 $54,876 $0.72 $0.73 $0.77 $0.80 Outdoor Water Conservation-Res G $300 77, ,343 5,671 2, $3,420,755 $1,719,377 $796,434 $181,138 $0.40 $0.40 $0.40 $0.41 Outdoor Water Conservation-Non Res G $ , $41,182 $21,091 $12,942 $7,509 $0.23 $0.23 $0.44 $0.58 TOTAL= $7,179,000 $3,643,000 $1,723,000 $443,000 $0.56 $0.57 $0.61 $ Rebate/Purchase cost per account may vary on the aggressivness of the program, costs per account are based on research and typical rebate amounts 2 Water savings per year per account from SWFWMD 2006 Regional Water Supply Plan, The Potable Water Conservation BMP's for Tampa Bay - Sept '04 (TBW), The Handbook of Water Conservation by Amy Vickers - Waterplow Press 3 No of years based on a typical water supply planning period of 20 years and the life of measure from manufacturer's recommendations 4 No. accounts targeted based on variable participation rates of 100% 50% & 5%; Estimations based on GIS parcel and housing information from the Polk County Property Appraiser; US Census Bureau; SWFWMD Public Water Supply Per Capita Water Use Survey ( A ) # of Accounts for Toilet Rebates and plumbing retrofit kits is based upon pre-1995 homes found using the Polk County Property Appraisers information and the 2007 SWFWMD Public Supply Per Capita Water Use Survey ( B ) # of Accounts for Waterless and ULV Urinals is based on the total number of commercial facilities based on the 2007 SWFWMD Public Supply Per Capita Water Use Survey ( C ) # of Accounts for High Efficiency Clothes Washers found using US Census bureau information;2007 SWFWMD Public Water Supply Per Capita Water Use Survey; Increase in population based on 2009 SWFWMD Population Estimations ( D ) # of Accounts for ICI spray valve replacements found from Polk County Property Appraisers parcel information and 2007 SWFWMD Public Water Supply Per Capita Water Use Survey; ( F ) # of Accounts for Rain Sensor and Soil Moisture Sensor based on the total number of accounts for SF, MF, and Non-Res from the 2007 SWFWMD Public Water Supply Per Capita Water Use Survey; Increase in population based on 2009 SWFWMD Population Estimations; Percentage irrigating found using Polk County Property Appraiser Information and the Florida Water ( G ) # of Accounts for Outdoor Water Conservation SF, MF, and Non-Res from the 2007 SWFWMD Public Water Supply Per Capita Water Use Survey; Increase in population based on 2009 SWFWMD Population Estimations;Percentage irrigating found using Polk County Property Appraiser Information and the Florida Water Rates Evaluation of Single-Family Homes - July 13, 5 Potable Flow Savings is calculated by multiplying # of participating accounts by the water savings rate per year 6 Equipment Fee, Research and Development, and training is based on " Development of Water Conservation Options for Non-Agricultural Water Users ", Southwest Florida Water Management District & Ayres Associates, August 2000;Each project was calculated seperatley by amoritizing at 8% interest for the life of the program (the total cost at a rated capacity used the total capital costs and savings amoritized over the average years implemented for all projects) R:\Projects\8501-Polk County Water Supply\Study-Report\Final_Report\Conservation\Appendices\Appendix B\PCU-SWRUSA Conservation Rebate Calculator

18 Reclaimed Water Reclaimed water produced at the wastewater treatment plant(s) within the PCU-SWRUSA could be used as an alternative source of water supply to offset existing or future demands, which would otherwise utilize potable water. These uses could include, but are not limited to: Public Access Areas & Landscape Irrigation Agricultural Irrigation Ground Water Recharge & Indirect Potable Reuse Industrial Toilet Flushing Fire Protection Wetlands The SWFWMD is currently investigating the benefits of setting a standard policy and procedure for issuing incentives to Utilities using reclaimed water in an environmentally beneficial way. Incentives could include: increased water use permit quantities, extended permit length, credits towards per capita demand offsets, or other potential incentives. The calculated increase in wastewater effluent flow rate from 2010 to 2030 was based on; (1) the 2009 SWFWMD Population and Demand estimates and; (2) the local government s current wastewater flow rate. For planning purposes, the estimated increase in future wastewater flow for the PCU-SWRUSA is estimated to be approximately MGD. This quantity will be used to estimate the amount to offset future potable water demands, but only in a case of use as reclaimed water for irrigation Surface Water Located within Polk County are a vast number of water bodies, including 554 lakes, 3 rivers (the Peace, the Alafia and the Kissimmee Rivers), and numerous other creeks and streams. For the purposes of this plan, stormwater was also categorized as surface water due to the nature in which stormwater could be captured and stored for potential use as an alternative water supply. Stormwater captured for use as a drinking water supply has not typically been practiced in Florida, or even elsewhere in the United States. However, stormwater capture has been widely used as a water supply source for localized irrigation or other non-potable water uses. The use of stormwater as an alternative supply for the purposes of this PCCWSP was limited to offsetting potable-quality water uses by supplementation with available stormwater for irrigation. Additionally, due to the limited water quantity available, creeks and streams were not investigated individually, but their contributions with the larger rivers that they supply were taken into consideration. The Peace River and Alafia River were investigated in detail in the 2009 PCCWSP for potential quantities of water available for public water supply within the regional supply category. The 14

19 Kissimmee Basin Modeling and Operations Study team is currently conducting similar investigations for potential supplies available from the Kissimmee River. Due to the high costs and location of these projects it is likely these surface water supplies will be implemented on a regional basis. When considering the use of surface water as an alternative source of supply, a variety of rules and regulations must be taken into strong consideration during the evaluation process. One of the most important regulatory constraints on surface water withdrawals in Florida is the concept of minimum flows and levels (MFL), which were evaluated thoroughly in the 2009 PCCWSP. As a result of MFL regulatory requirements, water withdrawal from these rivers and lakes will only be permitted if sufficient evidence is provided that MFLs are maintained Groundwater Two types of groundwater projects that the PCU-SWRUSA could potentially utilize for water supply include (1) the use of retired wells to mitigate impacts of proposed increased ground water withdrawals (commonly referred to as Land Use Transition) and (2) withdrawing water from the Lower Floridan Aquifer. Land Use Transitions SWFWMD has set a precedent to allow the use of offset quantities available resulting from the reduction of impacts through the mitigation process, the SFWMD has historically not approved such permitting attempts. Furthermore, the use of agricultural wells to supply water to meet potable water demands has limitations based on historical water usage, location, and documentation supporting reasonable demands. The SWFWMD has released draft documents regarding the issues surrounding land use transitions. The first draft Guidance Memorandum for Water Use Changes Associated with Land Use Changes was released in August This document serves as a guideline for the mitigation of adverse impacts on water resources, existing legal users, and off-site land uses. This document was reviewed by staff from Polk County, the local governments, and the PCCWSP Project Team. The SWFWMD reviewed their comments and released a revised version of the Memo titled Mitigation of Water Withdrawal Impacts Through Permanent Retirement of Used Permitted Quantities in early 2009 (PCCWSP Appendix C). There is still a considerable amount of land in the County s and local governments service areas that are currently zoned as agricultural or industrial, which also contain wells used for irrigation or other purposes. In the future, many of these areas could be rezoned and redeveloped from agricultural/industrial/mining to commercial and/or residential. Once the existing land use is discontinued, the wells could potentially be available to provide offset quantities through the mitigation/net benefit process. However, this is only applicable if the well permits are being retired. These non-public supply 15

20 wells are drawing source water from the UFA which provides relatively high quality source water for public supply. If the historical usage, location of the public water supply well, and documentation supporting a reasonable demand meet the requirements, it is possible that new wells of similar permitted quantity could be constructed or a portion of the withdrawal permitted quantity could be transferred to other existing Floridan wells. As a second option, if all permitting, utilization, and efficiency criteria are met, the SWFWMD will consider on a case by case basis the opportunity, to use these agricultural/industrial/mining wells to supplement the non-potable water demand. This is only applicable in situations where the reclaimed water supplies from the wastewater/reuse augmentation plants are not sufficient to meet the irrigation demands during dry periods on a temporary or intermittent basis (PCCWSP Appendix C) The PCCWSP Project team has compiled the agricultural/industrial/recreational water use permits for the PCU-SWRUSA. All of the wells, permitted quantities, and yearly withdrawals within the PCU-SWRUSA boundaries have been identified (Figure 1-4). Utilizing this information, scenarios were developed to estimate potential quantities for transition to public use. The total permitted quantities and the 10-Year average pumping in this area are MGD and MGD respectively (Table 1-8). It is important to note that land use transition projects involve using retired wells to mitigate impacts of proposed increased ground water withdrawals for public supply and not to seek out agricultural or mining areas for procurement with the agenda of capturing wells. The purpose of this task was to identify the maximum offset quantities available in each area based on historical trends. It is important to note that there are no guarantees that any of these parcels with existing wells will be available for mitigation purposes within the planning period. This exercise was performed to give the PCU-SWRUSA data estimates to use in their planning efforts to capture opportunities when they become available. 16

21 A IC R Agricultural Industrial and Commercial Recreation/Aesthetic PASCO SUMTER LAKE 540 ORANGE Gallons Per Day Lakeland OSCEOLA Less Than 100,000 HILLSBOROUGH 100,000 to 499, ,000 to 999,999 1,000,000 to 2,999,999 Greater Than 3,000,000 HILLSBOROUGH MANATEE HARDEE POLK HIGHLANDS Source Projection: Stateplane Florida Datum: NAD 1983 Zone: West Units: Feet Aerial Photographs: Aerials Express, A 60 35A 15A 22IC HILLSBOROUGH 25A Willow Oak 23A 05R 18IC Medulla 11R 11R 11R 17R 12R 37 28R Mulberry 16A Lakeland Highlands 08R 26A 20R 01A 10A 07A 06A 32A 33A 27A 27A 29A 37A 38A 37A 36A 13A Number, Permit Number, Permit Owner 01A, , CHARLES W DEWITT 02A, , OSCAR W ROGERS TRUSTEE OF THE O 03R, , RIVERLAKE PROPERTIES INC 04A, , W/W CITRUS CO 05R, , CARLTON ARMS OF LAKELAND 06A, , HIGHLANDS ENHANCEMENT INC 07A, , GARY J COTTERILL 08R, , MCDONALD PARTNERSHIP 700 C/O 09A, , R3 PROPERTY 10A, , OSCAR W ROGERS JR 11R, , IMPERIAL LAKES LAND CORP 12R, , RESERVATION GOLF COURSE 13A, , WALTER WILLIAMS INVESTMENT 14A, , S & M SADDLE CREEK CORP 15A, , WHS LAND LLC 16A, , REGAL DEVELOPMENT OF POLK CO INC 17R, , CHC VI LTD 18IC, , KAISER ALUMINUM & CHEMICAL CORP 19A, , OSCAR W ROGERS JR 09A 31A Highland City 04A 02A 21A 21A 24A 34A 30A 03R 14A 98 20R, , MERIDIAN POINTE INC 21A, , HIGHLAND CASSIDY LLC 22IC, , CHARLES RUTLAND 23A, , CHARLES E BAILEY 24A, , OSCAR W & CD ROGERS 25A, , RICHLAND LLC 26A, , BETTY JEAN THORNHILL 27A, , TIMOTHY S FROST 28R, , R WARNOCK J TEDDER S WATSON & 29A, , OSCAR W ROGERS TRUSTEE OF THE O 30A, , CORP 31A, , OSCAR W & C DANE ROGERS 32A, , OSCAR W ROGERS JR Bartow 33A, , AMIR AHMAD 34A, , CONSOLIDATED HOLDING COMPANY OF 35A, , BATISTA & EVELYN MADONIA 36A, , OSCAR W ROGERS JR 37A, , OSCAR W ROGERS TRUSTEE OF OSCAR 38A, , OSCAR W ROGERS TRUSTEE OF OSCAR Southwest Regional Utility Service Area Polk County Utilities / Permitted Annual Average Polk County Supplemental Water Supply Plan Polk County, Florida Southwest Regional Utility Service Area Miles P:\PROJECTS\WUP Maps - Polk County\PCU - SWRSA\MXD\Polk County Utilities_SWRSA_Permits_A_I_R.mxd

22 A IC R Agricultural Industrial and Commercial Recreation/Aesthetic PASCO SUMTER LAKE 540 ORANGE Gallons Per Day Lakeland OSCEOLA Less Than 100,000 HILLSBOROUGH 100,000 to 499, ,000 to 999,999 1,000,000 to 2,999,999 Greater Than 3,000,000 No Data Available HILLSBOROUGH MANATEE HARDEE POLK HIGHLANDS Source Projection: Stateplane Florida Datum: NAD 1983 Zone: West Units: Feet Aerial Photographs: Aerials Express, A 60 35A 15A 22IC HILLSBOROUGH 25A Willow Oak 23A 05R 18IC Medulla 11R 11R 11R 17R 12R 37 28R Mulberry 16A Lakeland Highlands 08R 26A 20R 01A 10A 07A 06A 32A 33A 27A 27A 29A 37A 38A 37A 36A 13A Number, Permit Number, Permit Owner 01A, , CHARLES W DEWITT 02A, , OSCAR W ROGERS TRUSTEE OF THE O 03R, , RIVERLAKE PROPERTIES INC 04A, , W/W CITRUS CO 05R, , CARLTON ARMS OF LAKELAND 06A, , HIGHLANDS ENHANCEMENT INC 07A, , GARY J COTTERILL 08R, , MCDONALD PARTNERSHIP 700 C/O 09A, , R3 PROPERTY 10A, , OSCAR W ROGERS JR 11R, , IMPERIAL LAKES LAND CORP 12R, , RESERVATION GOLF COURSE 13A, , WALTER WILLIAMS INVESTMENT 14A, , S & M SADDLE CREEK CORP 15A, , WHS LAND LLC 16A, , REGAL DEVELOPMENT OF POLK CO INC 17R, , CHC VI LTD 18IC, , KAISER ALUMINUM & CHEMICAL CORP 19A, , OSCAR W ROGERS JR 09A 31A Highland City 04A 02A 21A 21A 24A 34A 30A 03R 14A 98 20R, , MERIDIAN POINTE INC 21A, , HIGHLAND CASSIDY LLC 22IC, , CHARLES RUTLAND 23A, , CHARLES E BAILEY 24A, , OSCAR W & CD ROGERS 25A, , RICHLAND LLC 26A, , BETTY JEAN THORNHILL 27A, , TIMOTHY S FROST 28R, , R WARNOCK J TEDDER S WATSON & 29A, , OSCAR W ROGERS TRUSTEE OF THE O 30A, , CORP 31A, , OSCAR W & C DANE ROGERS 32A, , OSCAR W ROGERS JR Bartow 33A, , AMIR AHMAD 34A, , CONSOLIDATED HOLDING COMPANY OF 35A, , BATISTA & EVELYN MADONIA 36A, , OSCAR W ROGERS JR 37A, , OSCAR W ROGERS TRUSTEE OF OSCAR 38A, , OSCAR W ROGERS TRUSTEE OF OSCAR Southwest Regional Utility Service Area Polk County Utilities / 10 Year Average ( ) Polk County Supplemental Water Supply Plan Polk County, Florida Southwest Regional Utility Service Area Miles P:\PROJECTS\WUP Maps - Polk County\PCU - SWRSA\MXD\Polk County Utilities_SWRSA_Permits_10_Year.mxd

23 A IC R Agricultural Industrial and Commercial Recreation/Aesthetic PASCO SUMTER LAKE 540 ORANGE Gallons Per Day Lakeland OSCEOLA Less Than 100,000 HILLSBOROUGH 100,000 to 499, ,000 to 999,999 1,000,000 to 2,999,999 Greater Than 3,000,000 No Data Available HILLSBOROUGH MANATEE HARDEE POLK HIGHLANDS Source Projection: Stateplane Florida Datum: NAD 1983 Zone: West Units: Feet Aerial Photographs: Aerials Express, A 60 35A 15A 22IC HILLSBOROUGH 25A Willow Oak 23A 05R 18IC Medulla 11R 11R 11R 17R 12R 37 28R Mulberry 16A Lakeland Highlands 08R 26A 20R 01A 10A 07A 06A 32A 33A 27A 27A 29A 37A 38A 37A 36A 13A Number, Permit Number, Permit Owner 01A, , CHARLES W DEWITT 02A, , OSCAR W ROGERS TRUSTEE OF THE O 03R, , RIVERLAKE PROPERTIES INC 04A, , W/W CITRUS CO 05R, , CARLTON ARMS OF LAKELAND 06A, , HIGHLANDS ENHANCEMENT INC 07A, , GARY J COTTERILL 08R, , MCDONALD PARTNERSHIP 700 C/O 09A, , R3 PROPERTY 10A, , OSCAR W ROGERS JR 11R, , IMPERIAL LAKES LAND CORP 12R, , RESERVATION GOLF COURSE 13A, , WALTER WILLIAMS INVESTMENT 14A, , S & M SADDLE CREEK CORP 15A, , WHS LAND LLC 16A, , REGAL DEVELOPMENT OF POLK CO INC 17R, , CHC VI LTD 18IC, , KAISER ALUMINUM & CHEMICAL CORP 19A, , OSCAR W ROGERS JR 09A 31A Highland City 04A 02A 21A 21A 24A 34A 30A 03R 14A 98 20R, , MERIDIAN POINTE INC 21A, , HIGHLAND CASSIDY LLC 22IC, , CHARLES RUTLAND 23A, , CHARLES E BAILEY 24A, , OSCAR W & CD ROGERS 25A, , RICHLAND LLC 26A, , BETTY JEAN THORNHILL 27A, , TIMOTHY S FROST 28R, , R WARNOCK J TEDDER S WATSON & 29A, , OSCAR W ROGERS TRUSTEE OF THE O 30A, , CORP 31A, , OSCAR W & C DANE ROGERS 32A, , OSCAR W ROGERS JR Bartow 33A, , AMIR AHMAD 34A, , CONSOLIDATED HOLDING COMPANY OF 35A, , BATISTA & EVELYN MADONIA 36A, , OSCAR W ROGERS JR 37A, , OSCAR W ROGERS TRUSTEE OF OSCAR 38A, , OSCAR W ROGERS TRUSTEE OF OSCAR Southwest Regional Utility Service Area Polk County Utilities / 6 Year Average ( ) Polk County Supplemental Water Supply Plan Polk County, Florida Southwest Regional Utility Service Area Miles P:\PROJECTS\WUP Maps - Polk County\PCU - SWRSA\MXD\Polk County Utilities_SWRSA_Permits_6_Year.mxd