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Mr. Himanshu Mehta, P.E. Managing Director 7 November 2019 Page 2 (i.e., dewatering liquids) from the RDF are transmitted via force main to the West Regional Wastewater Treatment Facility (WRWWTF) for treatment and disposal. On February 19, 2019, SWDD authorized Geosyntec, under CCNA 2018 Work Order No. 4, to evaluate landfill liquids management alternatives for the IRC Landfill. The purpose of the study was to evaluate options for reducing the nutrient loading from the Landfill leachate and RDF centrate that are potentially impacting the stringent permit conditions at the WRWWTF. The study focused on: (i) review of the liquid chemistry and flow data; (ii) an evaluation of liquids management options; (iii) discussion of conceptual costs; (iv) summary of findings; and (v) recommendations. The results of the study were presented in a technical memorandum that was submitted to SWDD on 3 July 2019. Based on an evaluation of leachate characteristics from the April 2019 sampling compared to historical analytical data, arsenic (As), total nitrogen (TN) and total dissolved solids (TDS) were found to exceed the local limits and would therefore require pretreatment prior to continued discharge to the WRWWTF. Also, based on a review of historical Landfill leachate flow data from June 2016 to February 2019, a peak daily flow rate of 20,000 gallons per day (gpd) was used for the evaluation of leachate management options. Two primary leachate treatment/management strategies (i.e., onsite treatment and leachate evaporation) were evaluated in the study. The evaluated onsite treatment approach involved the use of a biological system (Membrane Bioreactor [MBR]) combined with Reverse Osmosis (RO) for the removal of the constituents to below the local limits required by the WRWWTF. One vendor of biological and/or physical treatment systems (i.e., Dynatec Systems, Inc. of Burlington, NJ) was contacted to provide the conceptual design and cost estimate to manage 20,000 gpd of leachate. The second alternative evaluated is liquids volume reduction via onsite evaporation. Two vendors of thermal leachate evaporator systems (APTIM of Acworth, GA and Heartland Water Technology, Inc. of Hudson, MA) were contacted to provide conceptual designs and cost estimates for systems to manage 20,000 gpd of leachate. Geosyntec utilized the data provided by these vendors to prepare capital and O&M comparison cost estimates for the management of leachate from the Landfill. Based on the technical and economic evaluations presented in the study, there is a potential that leachate evaporation using the Heartland system could be a cost -competitive alternative to onsite treatment and continued discharge of pretreated effluent to the WRWWTF. To better evaluate the feasibility of leachate evaporation, a pilot study in cooperation with Heartland was recommended. Geosyntec understands that Heartland, in collaboration with Indian River Eco District, LLC (IRED) of Lufkin, Texas, are interested in installing a leachate evaporator system at the adjacent property currently owned by the IRED. Therefore, SWDD has solicited a proposal from IRED