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September 2015 3-20 14-14979 transmissivity of 20,000 ftz/day and a specific capacity of 100 gpm/ft. The SJRWMD ECFS Model uses a transmissivity of 84,400 f2/day in the UFA. Middle Confining Unit and the Avon Park Permeable Zone The Middle Confining Unit (MCU) underlies the UFA separating the UFA and LFA and is characterized by lower permeability (hydraulic conductivities) than the UFA and LFA. The lithologies are typically mictitic limestones, dolomitic limestones,and dolomite. The MCU is located within the Avon Park Formation at a depth of approximately 750 ft bls and the overall thickness is approximately 800 ft at the Site. The MCU is divided into two parts (MCI and MC2)by the APPZ. Based on the ECFS Model, the APPZ is approximately 417 feet thick at the Site. The ECFS Model uses a leakance value of 0.034 ft/day/ft for MCI and a value of 6.1 x 10-4 ft/day/ft for MC2. The transmissivity of the APPZ in the ECFS Model is 1.66 x 106 W/day in the vicinity of the Site. Lower Floridan Aquifer The LFA consists of the lower portion of the Avon Park Formation and the Oldsmar Formation. The LFA consists of several permeable zones separated by extensive confining intervals. The lower portion of the LFA contains a zone of cavernous permeability, called the Boulder Zone. The Boulder Zone is typically developed in fractured dolomite in southern Florida and at the Site. The top of the Boulder Zone is anticipated at a depth of approximately 2,600 ft bls at the Site. The base of the LFA is expected to be encountered at a depth of 3,200 ft bls at the Site. ,Two deep injection wells have been installed in Okeechobee County and are installed to a depth of approximately 3,200 and 3,500 ft bls. 3.3.2.2 Karst Hydrogeology Karst terrains develop in areas underlain by carbonate rocks such as limestone. They often have drainage systems that are reflected on the surface as sinkholes,springs, disappearing streams, or even caves. According to Map Series No. 10, Sinkhole Type, Development, and Distribution in Florida (William C. Sinclair and J.W. Stewart, 1985), the site is located in Area 11, where the cover is reported to be 30 to 200 ft thick. In these areas, sinkholes are reported to be few, shallow, of small diameter and develop gradually. Furthermore, within the prior boring drilled at the Area II site, indicators of karst geology such as voids or loss of circulation were not encountered. There are no karst topological features in the region(Ardaman,2015). Attachment 1 b Fps. 203