SECTION 2.0 EXISTING WASTEWATER SYSTEM 2.1 Background The County operates and maintains extensive wastewater collection, transmission and treatment/disposal facilities on the west side of Hernando County. As a result of the construction of the Suncoast Parkway, the quality of life offered, the high level of governmental services, and other factors, the West Hernando County area is experiencing rapid growth. This growth is projected to continue twenty or more years into the future. The County would like to accommodate the anticipated growth by increasing and/or maximizing the existing sewer facilities, while correcting deficient sewer facilities. This will ultimately develop efficient collection, transmission, and subregional wastewater treatment facilities to best serve the County and its customers. 2.2 System inventory At the beginning of the study, the existing sewer system included seven wastewater treatment plants, an estimated 150 pump stations and approximately 200 miles or more of force main and gravity sewers. The gross service area was on the order of 25 square miles. In January 2004, the County purchased the Spring Hill wastewater system from Florida Water Services. This system is comprised of 63 pump stations, approximately 150 miles of force mains and gravity sewers and one wastewater treatment plant. The combined infrastructure of the Spring Hill system and the West Hernando County system includes the following: 213 Pumping Stations 350 Miles of Force Mains and Gravity Sewer 8 Wastewater Treatment Plants 2.3 Subregional Wastewater Treatment Plants The County owns and operates eight wastewater treatment plants on the west side of the County. The capacity of each facility is listed in Table 2-1. J:\00313\00313006.01\DOC\Reports\Final.doc 7 August 2005
Table 2-1 Treatment Facility Capacities Design Capacity SWWTP or WWTP Gallons per Day (GPD) Airport SWWTP 1,000,000* Berkeley Manor SWWTP 750,000 Brookridge SWWTP 750,000 Glen SWWTP 1,000,000 Spring Hill SWWTP 2,700,000* Hernando Beach WWTP 250,000 Seville WWTP 15,000 Weeki Wachee WWTP 250,000 * Permitted capacity of the Airport WWTP is 750,000 GPD * Permitted capacity of the Spring Hill WWTP is 2,500,000 GPD 2.4 SWWTP Service Boundaries The service area boundaries for each SWWTP of West Hernando County are indicated below. Airport SWWTP The service area boundaries for the Airport SWWTP can generally be described as follows: Northern Boundary: SR 50/City of Brooksville First Right to Refusal Boundary Western Boundary: Mariner Boulevard Eastern Boundary: US 41 Southern Boundary: Hernando County Line Spring Hill SWWTP The service area boundaries for the Spring Hill SWWTP can generally be described as follows: Northern Boundary: North Boundary of Timber Pines Subdivision Western Boundary: Gulf of Mexico Eastern Boundary: Mariner Boulevard Southern Boundary: Hernando County Line J:\00313\00313006.01\DOC\Reports\Final.doc 8 August 2005
Brookridge SWWTP The service area boundaries for the Brookridge SWWTP can generally be described as follows: Northern Boundary: Hernando County Line Western Boundary: Sunshine Grove Road Eastern Boundary: City of Brooksville First Right to Refusal Boundary Southern Boundary: SR 50 The Glen SWWTP The service area boundary for The Glen SWWTP can generally be described as follows: Northern Boundary: Hernando County Line Western Boundary: Gulf of Mexico Eastern Boundary: Sunshine Grove Road Southern Boundary: SR 50 Berkeley Manor SWWTP The service area boundary for the Berkeley Manor SWWTP can generally be described as follows: Northern Boundary: SR 50 Western Boundary: US 19 Eastern Boundary: West Power Lines Southern Boundary: North boundary of the Timber Pines Subdivision Figure 2-1 illustrates the service area boundaries described above. 2.5 City of Brooksville First Right to Refusal District Hernando County and the City of Brooksville have entered into a sewer service area agreement that defines The City of Brooksville s First Right to Refusal for wastewater services. This agreement establishes boundaries that give the City of Brooksville the first right to provide wastewater service to new development. If the City of Brooksville declines to provide this service then the County has the right to provide the wastewater service. The boundaries of the First Right to Refusal area are also illustrated in Figure 2-1. J:\00313\00313006.01\DOC\Reports\Final.doc 9 August 2005
US 19 SUNSHINE GROVE RD COBB RD CITRUS WAY CEDAR LN WPA RD JASMINE DR MCINTYRE RD SNOW MEMORIAL HWY DALY RD US 98 THRASHER AVE KNUCKEY RD US 41 LAKE LINDSEY RD CENTRALIA RD OLD CRYSTAL RIVER RD CYRANO AV Gulf of Mexico PINE ISLAND DR HEXAM RD SUNCOAST PARKWAY YONTZ RD HOWELL AVE CROOM RD RIDGE RD FT DADE AVE W JEFFERSON ST MAIN ST MONDON HILL RD SR 50 WISCON RD This is not a Map of Survey. J:\00313\00313006.01\GIS\mxd\11X17\ServiceAreas_11X17.mxd / 0 SHOAL LINE BLVD OSOWAW BLVD 10,000 Feet GRAND CLUB DR PINEHURST DR DELTONA BLVD ELGIN BLVD NORTHCLIFFE BLVD COUNTY LINE RD Brookridge SWWTP Glen SWWTP LEMA DR MARINER BLVD LINDEN DR BARCLAY AVE CORONADO DR WWTP Service Boundaries Spring Hill SWWTP Airport SWWTP ANDERSON SNOW RD CALIFORNIA ST Berkeley Manor SWWTP SPRING HILL DR Brooksville First Right to Refusal POWELL RD AYERS RD SATURN RD MITCHELL RD CULBREATH RD EMERSON RD HAYMAN RD West Hernando County Sewer Master Plan SWWTP Service Area Boundaries Figure 2-1 SPRING LAKE HWY
2.6 Future of the WWTPs Future plans call for several WWTPs to be phased out and flows diverted to other treatment plants. The County has indicated that Weeki Wachee WWTP will be decommissioned by the year 2010, while Hernando Beach WWTP will be decommissioned by the year 2005. The County has projected that Seville WWTP will be decommissioned by the year 2010. The County has also discussed decommissioning Berkeley Manor SWWTP in at least 20 years. Decommissioning of these facilities is discussed in more detail throughout this report. 2.7 Septic Tanks The County s service area has been developing since the 1950 s, with periods of high growth beginning in the 1980 s through the present. A major portion of this development was constructed with on-site treatment systems, including septic tanks. For example, the Spring Hill area in the southwestern area of the County has approximately 28,000 water customers and only approximately 6,800 wastewater customers (accounts served by Florida Water Services prior to purchase by County). Properly functioning septic tank systems are effective at wastewater treatment and, if maintained properly, will provide adequate service for many years. It is important to inspect and monitor septic tanks, since steel tanks can rust and collapse, while concrete tanks can crack and allow leakage. Baffles in tanks can also break, rust or crack causing solids to flow out of the tank and into the absorption system. These types of failures can cause system malfunctions and potential health and environmental risks. Since the use of septic tanks has not caused any specific problems, the County plans to keep this type of treatment in operation. Therefore, for the planning period of this study, flows from septic tanks will not be diverted to a County treatment facility. New developments will be connected to the County s collection system, while septic tanks will remain in service with continued monitoring by County staff. J:\00313\00313006.01\DOC\Reports\Final.doc 11 August 2005