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Mr. Himanshu H. Mehta, P.E. 2 June 2023 Page 2 PROJECT BACKGROUND GeospteO' consultants As part of the long-term monitoring activities for the identified CVOC plume associated with the South Gifford Road Landfill, a network of monitoring wells require sampling on an annual or semi-annual basis to: (i) confirm that the CVOC plume is not migrating by monitoring the lateral and vertical extent; (ii) evaluate the impact of source and dissolved plume bioremediation to assess CVOC plume centerline concentrations over time; and (iii) assess the impact of biological and physical natural attenuation processes on CVOC plume degradation. In consideration of the ongoing natural attenuation processes occurring at the site, the enhancement of these biological processes via the injection of an electron donor was proposed and agreed to in concept by the FDEP in correspondence dated 2 August 2006. In response to FDEP's request and supported by groundwater monitoring results, Geosyntec conducted previous bioremediation injection events in 2008, 2009, 2012, and 2017 to remediate recalcitrant CVOC groundwater impacts in the former source area and downgradient biobarriers. Groundwater monitoring results in 2022 suggest that reductive dechlorination has slowed significantly in groundwater at the Site and it is appropriate to plan for an injection event in 2024. In addition to bioremediation activities, semi-annual groundwater monitoring and reporting for CVOCs at 42 monitoring well locations will be conducted in 2023. PROPOSED SCOPE OF WORK For the purpose of budgeting, the scope of work has been divided into the following phases: • Phase 1— Project Management; • Phase 2 — Meetings/Regulatory Interaction; • Phase 3 — Annual Pollution Remediation Liabilities Evaluation; • Phase 4 — Semi -Annual Sampling Activities; • Phase 5 — Data Evaluation and Semi -Annual Reporting; • Phase 6 — Pre-RAPM Addendum No. 4 Injection Activities; and • Phase 7 — Prepare RAPM Addendum No. 4. The remainder of this section presents a general description of the activities to be performed in each phase. FR0766\XR23010.docx engineers I scientists I innovators