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Mr. Himanshu Mehta, P.E. Managing Director 11 February 2019 Page 2 The regional lift station, force main, and WRWWTF are operated and maintained by the IRC Utilities Department (IRCUD). The WRWWTF is permitted by the Florida Department of Environmental Protection (FDEP) with Permit No. FL0041637 to operate and discharge treated effluent into the: (i) Lateral D Canal (Part I.A of Permit); and (ii) created wetland as land application and to the countywide reuse system (Part LB of Permit). Geosyntec understands that the WRWWTF is currently designed and permitted to treat 6 million gallons per day (mgd). However, the treatment capacity is limited by restrictions on the amount of treated effluent, due to severe Total Maximum Daily Load (TMDL) and wasteload allocations (WLA), that can be discharged to the Lateral D Canal via created wetlands (4 mgd). The treated effluent that can go to the created wetlands can also be reclaimed for use by golf courses and other services; however, the demand for this reclaimed wastewater declines during the rainy seasons resulting in more flow to the wetlands. The component of the treated effluent that cannot be used as reclaimed wastewater is hereafter referred to as wet weather liquid. It is also anticipated that the capacity that can be discharged into the Lateral D Canal may be further restricted by nutrient WLA for the facility established as part of the TMDL for the Indian River Lagoon. The SWDD in conjunction with the IRCUD would like to explore other liquids management options for the combined leachate and centrate liquids from the IRCL facility. Besides discharging the liquids to an off-site publicly -owned treatment works (POTW), such as the WRWWTF, the other commonly used leachate management approaches at MSW (i.e., Class I) landfills are: (i) on-site leachate recirculation back into the landfill; (ii) volume reduction using evaporation technology; (iii) discharge into an on-site underground injection control (UIC) well; (iv) off-site trucking to an UIC well; and (v) on-site treatment using a variety of physical, chemical, and/or biological approaches ranging from reverse osmosis (RO) to sequencing batch reactors (SBRs), aerated lagoons, and constructed wetlands. On-site treatment may be performed to meet industrial pretreatment standards for eventual discharge to a POTW, or it may be utilized as a stand-alone treatment system for subsequent discharge via a National Pollutant Discharge Elimination System (NPDES) permit or an UIC permit, on-site reuse, or land application. The SWDD Board has previously provided IRC staff direction of not pursuing the use of an UIC well (either onsite or off-site) but rather pursue other viable options for the treatment and disposal of the liquids from the IRCL facility. Therefore, this proposal is focused on some of the other leachate management options described above. PROPOSED SCOPE OF WORK This proposal presents the scope of work for conducting a focused feasibility evaluation of liquids management options for the IRCL facility. The project objectives are to evaluate existing conditions and to provide recommendations towards a more sustainable liquids (leachate- centrate) management strategy, including the identification of a potentially more cost-effective engineers I scientists 1 innovators