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Mr. Himanshu H. Mehta, P.E. 25 September 2020 Page 5 Phase 2 — Database Preparation The historical groundwater and surface water analytical data collected at both the Class I landfill and the: C&D debris disposal facility is not currently in a database for long-term trend analysis which will be required to justify background demonstrations needed in the future and to address specific FDEP issues raised as summarized below. • The FDEP comment letter dated 6 May 2020 indicated evaluation monitoring was required at 25 of the Class I landfill monitoring wells, however, when presented with an evaluation of the long-term groundwater concentration trends generated from the WACS database the requirement was reduced to 4 wells. It should be noted that the WACS database is not complete and will need to be supplemented with additional data. • The FDEP letter dated 14 August 2020 indicated the enforcement of a groundwater standard for ammonia based upon regional surface water analytical results. In order to effectively address this FDEP comment in the future, a complete database will be needed which includes the Site and regional surface water analytical data. To supplement the existing WACS database, groundwater and surface water data from the following sources will be integrated into a new database: 1. Baseline analytical data from initial Hydrogeologic and Geotechnical reports from both the Class I landfill and C&D debris disposal facility; 2. ' Biennial reports from both the Class I landfill and C&D debris disposal facility (dating back to 1978); 3. Contamination Evaluation Reports or any other Assessment Monitoring Report from both the Class I landfill and C&D debris disposal facility; and 4. Information from the STORET database from surface water and groundwater monitoring locations within a one -mile radius of the Site and all surface water monitoring locations within the Lateral C Canal between the Site and the Indian River Lagoon. Geosyntec will have to retool most of this information from a table that was presented in a report to an electronic form (in Microsoft® Excel) that can be uploaded into this format. Geosyntec has assumed that 47 reports will need to be retooled. The deliverable for this task will be a Microsoft® Access format of the database and two (2) figures indicating the local and regional data collection locations. The Microsoft® Access will include various queries and reports that will allow Geosyntec to perform the trend analysis on the NCP2020_3158/JL200925 2020 Compliance Monitoring Prgposal