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EXHIBIT A INDIAN RIVER COUNTY LANDFILL SURFACE WATER AND GROUNDWATER MONITORING AND EVALUATION PHASE BACKGROUND On February 4, 2010 Indian River County (IRC) Solid Waste Disposal District (SWDD) staff noticed a discoloration in the C-5 drainage canal (C-5 Canal) which appeared to originate just north of the closed unlined landfill cell. The C-5 Canal is part of the Indian River Farms Water Control District (IRFWCD) canal system and ultimately drains into the Indian River Lagoon. After observing the discolored water SWDD immediately notified the IRC stormwater inspector and the IRFWCD. At the request of the IRFWCD a ditch block was placed in the C-5 Canal to stop flow until further testing could be performed. Surface water samples were taken on February 26, 2010. After review of the data and comparison of the results to the allowable values for Surface Water Quality Standards as defined in Chapter 62-302, of the Florida Administrative Code (F.A.C)., it was determined that releasing the water would have no significant adverse impact on the quality of water in the C-5 Canal or downstream receiving water bodies. Therefore, the ditch blocks were removed on March 11, 2010. Camp Dresser & McKee Inc. (CDM) and SWDD met with IRFWCD and IRC stormwater representatives to discuss the potential contamination of the C-5 Canal and possible long and short term solutions to address the problem. In accordance with discussions in the meeting and as requested by SWDD, CDM notified the Florida Department of Environmental Protection (FDEP) on March 11, 2010 of the potential contamination. CDM, SWDD, and IRFWCD representatives met with FDEP on March 30, 2010 to discuss the situation and the appropriate steps for moving forward. In the meeting, FDEP requested that IRC initiate evaluation monitoring pursuant to Chapter 62- 701.510 (7), F.A.C. and further evaluate the nature of contamination in the C-5 Canal to determine if short-term interim actions are necessary to mitigate the contamination in surface water. As discussed with the FDEP and SWDD,'CDM will proceed in two separate Phases. Phase I includes the development of evaluation plans as required by FDEP, installation of shallow groundwater monitoring wells, collection and analyses of groundwater and surface water samples, and reporting. Phase II, if necessary, includes the feasibility analysis, design, permitting and implementation of the optimum corrective action strategy. Phase II will be performed under a separate work order. cm A-1 2767,aoc: