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40 <br />• <br />r <br />Indian River Counly Uia`iitles <br />Concentrate Disposal Options <br />The plant currently has a recovery rate of 80 percent. If the recovery is increased to 90 <br />percent through the addition of a third stage, the amount of concentrate decreases <br />from 0.6 million gallons per day (MGD) to 0.3 MGD. The blend water could be <br />increased and allow the plant to be increased. The resultant concentrate would be <br />twice as concentrated. <br />UAB Response: <br />The UAB advised that this option should be investigated in the future but should not <br />be included as the immediate solution. CDM recommends conducting a pilot study <br />to identify the possible impacts of the concentrated effluent. <br />3.13 Injection Well Disposal <br />Injection well disposal would require one or two injection wells to be installed to <br />approximately 3000 feet for the injection of the concentrate. The wells are costly to <br />install, require injection pumps (energy costs), and must be maintained. The wells <br />also require FDEP permitting and would have to be located in an area that would not <br />adversely affect the aquifer from which the water treatment plant draws. <br />UAB Response: <br />The UAB recommended not pursuing this option further at the May 4 meeting. <br />3.14 Industrial Use Disposal <br />Concentrate may be used as industrial process water in citrus packing plants as wash <br />water. Agreements and arrangements would have to be made between the users of <br />the concentrate and the County. Reliability of the discharge would be uncertain <br />because of the seasonal nature of the business. County roads department have also <br />expressed an interest to utilize concentrate for dust control on area dirt roads. <br />Another industrial user may be the proposed Calpine power plant to be constructed <br />on 741+ Avenue. The concentrate may be mixed with other water for their cooling <br />water needs. <br />UAB Response: <br />The UAB, while not eliminating these options, voiced concerns at the'May 4 meeting <br />regarding the viability based on a limited industrial demand for the concentrate. <br />CIM C mry Chr r&JWK"Inc. <br />soma n�,y� <br />10 <br />