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EXHIBIT A AUTHORIZATION FOR PROFESSIONAL SERVICES INDIAN RIVER COUNTY SOLID WASTE DISPOSAL DISTRICT ENGINEERING SERVICES FOR 2018 PERMIT COMPLIANCE MONITORING AND REPORTING CCNA-2014 WO NO. 13 This Authorization, when executed, shall be incorporated in, and become part of the Continuing Contract Agreement for Professional Services between the Indian River County Solid Waste Disposal District (COUNTY), and CDM Smith Inc. (CONSULTANT), dated December 6, 2011, and the Extensions and Amendments of Continuing Contract Agreement for Professional Services, dated November 4, 2014 and October 24, 2017, hereafter referred to as the Contract. BACKGROUND Solid Waste Operation Permit Water Quality Compliance Semi-annual reports of groundwater quality at the COUNTY Landfill must be submitted to the Florida Department of Environmental Protection (FDEP) in accordance with Chapter 62-701.510, Florida Administrative Code (F.A.C.) and the Water Quality Monitoring Plan (WQMP) included as Appendix 3 of Permit Nos. 0128769 -022 -SC and 0128769 -023 -SO for the Class I landfill and the WQMP included as Appendix 3 of Permit No. 0128769 -025 -SO -24 dated July 13, 2017 for the C&D debris disposal facility. Two semi-annual monitoring reports that document the sampling events will be required in calendar year 2018. Semi-annual sampling of the Class I and C&D debris disposal facility groundwater monitor wells shall be performed in January and July of 2018. The samples collected from the Class I monitoring wells during these events will be analyzed for the routine monitoring parameters listed in Paragraph 7 of the WQMP and Chapter 62-701.510(7)(a), F.A.C. The samples collected from the C&D debris disposal facility monitoring wells, except for MW -21, will be analyzed for the routine monitoring parameters listed in Paragraph 8 of the WQMP and Chapter 62-701.730(8)(c), F.A.C. In total, 39 wells (29 Class 1 and 10 C&D) will be sampled in January and 26 wells (16 Class I and 10 C&D) will be sampled in July. Samples from one surface water site shall be collected in January and July, if water is discharging from the stormwater pond. The samples, if collected, will be analyzed for the parameters listed in Paragraph 13 of the WQMP and Chapter 62-701.510(7)(b), F.A.C. All laboratory analyses will be performed by the COUNTY contract laboratory (ENCO). Evaluation Monitoring for the C&D Debris Disposal Facility Results of routine semi-annual monitoring of groundwater quality at the C&D debris disposal facility in January 2017 indicated that confirmed concentrations of benzene and sodium exceeded the Primary Drinking Water Standard Maximum Contaminant Levels (MCLS) in samples collected from monitor well MW -21S. MW -21S is one of the 10 detection monitor wells that comprise the monitoring network for the C&D debris disposal facility. In accordance with Florida Department of CDM Smith A-1 )12146 WO No.13.doa