03/22/2016 - Laserfiche WebLink

Home Browse Search

September 2015 3-16 14-14979 Floridan Aquifer System The FAS is characterized geophysically by high gamma ray activity and low resistivity. The high gamma ray activity of the formation is a result of the high phosphate content of the sediments. The low resistivity is indicative of the highly mineralized clay Ocala Limestone The Ocala Limestone of the Late Eocene Age and is anticipated to occur from a depth of approximately 400 to 500 ft bls at the Site. This formation generally consists of white to tan, highly fossiliferous limestone and generally has high porosity and permeability(Reese,R.S. and Richardson, Ermly, 2008). it is characterized geophysically by low gamma ray activity and moderate resistivity. Water produced from the Ocala Formation is typically brackish(TDS between 1,000 and 3,000 mg/L) and is frequently used for raw water supply for reverse osmosis water treatment plants in Florida. Avon Park Formation The Avon Park Formation of the Mid-Eocene Age is anticipated to occur from a depth of approximately 500 to 2,100 ft bls. The Avon Park Formation consists primarily of interbedded, micritic to fossiliferous limestone, dolomitic limestone and dolomite. The permeability in portions of the formation is typically high due to fracturing which is common within the dolomite units (Reese, R.S. and Richardson, Emily, 2008). The upper portion of the formation is more permeable than the lower portion and contains water-producing intervals. The lower portion of the Avon Park Formation consists of relatively low-permeability limestone, dolomitic limestone and dolomite and prevents fluids of differing quality from migrating between more permeable zones above and below this confining interval. Water produced from the upper portion of the Avon Park is typically brackish, while water from the lower portion of the formation is saline to highly saline (TDS between 3,000 and 35,000 mg/L). Oldsmar Formation The top of the Oldsmar Formation of the Early Eocene Age is anticipated to occur from a depth of approximately 2,100 ft bls. The lithology of the Oldsmar Formation at the Site is anticipated to consist of dolomite, dolomitic limestone, and limestone. Glauconitic limestone marks the top of Oldsmar Formation in east-central Florida (Reese, R.S. and Richardson, Emily, 2008). The upper portion of the formation is confining in nature. The lower portion of the formation is anticipated to include a highly transmissive, fractured, and cavernous interval known as the "Boulder Zone". The Boulder Zone is used as the injection zone for most Class I deep injection wells in south Florida. The top of Boulder Zone is anticipated to be located at a depth of approximately 2,600 ft bls at the Site. 0 Attachment 1 b 't- 199