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Honorable Chairman and <br />Board of County Commissioners <br />9/16/91 <br />Page 11 <br />The waste activated sludge generated at the wastewater treatment plants is <br />removed by a contract hauler for disposal. The contract haulers transport <br />the sludge in trucks to currently approved sites for liquid land disposal. <br />Liquid land disposal is the disposal of waste activated sludge having a <br />concentration of less than 12 percent solids onto pasture lands and fields. <br />For treatment and disposal of septage in the County, residential and <br />commercial customers contract with private haulers for the removal of <br />septage. The haulers transport the septage to the old Gifford Wastewater <br />Treatment Plant where it is received in "slug" loads and then aerated. The <br />aerated septage is then pumped to the headworks of the Central Sub -Regional <br />Treatment Plant where it becomes part of the wastewater stream. The <br />resulting waste activated sludge is removed by a contract hauler for liquid <br />land disposal as previously described. <br />Within Indian River County. one septage hauler presently owns and operates a <br />small lime stabilization facility. permitted by FDER. A spokesperson for <br />this company estimates that they transport 2,000 gallons per day of septage <br />collected from residential and commercial customers to the facility for <br />processing. The septage is removed from the pumper -truck and discharged into <br />a holding tank where the septage undergoes lime stabilization. The treated <br />septage is removed for liquid land disposal through the same processes as <br />mentioned above. <br />The existing process for treatment and disposal of grease begins with a <br />private hauler removing the material from residential and commercial grease <br />traps. The hauler collects the material into a vehicle holding tank and <br />transports the material to the Indian River County Landfill. The material is <br />disposed of as Grade I11 food sludge by direct discharge onto the active <br />M. VRB2/5 <br />