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Mr. Himanshu H Mehta, P.E. GeOSynteC"' 17 February 2016 consultants Page 2 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. A RAP Modification (RAPM) was submitted to the FDEP outlining the injection of an electron donor, Emulsified Oil Substrate (EOS®), in May 2007. Geosyntec implemented the RAPM activities in April through June 2008, as documented in the RAPM Implementation Report submitted to FDEP as Appendix A to the June 2008 Semi-Annual Groundwater Monitoring Report. RAPM Addendum implementation, which included bioremediation implementation in the former source area, was completed in June and July 2009 and documented in the July 2009 RAPM Addendum Implementation Report. The ongoing semi-annual groundwater monitoring activities have documented the success of this approach. EOS® is designed to provide a carbon source to the indigenous bacteria for up to approximately three years. In response to FDEP's request dated 3 May 2011 and supported by groundwater monitoring results, a RAPM Addendum No. 2 was prepared and presented an electron donor injection plan to address recalcitrant chlorinated volatile organic compound (CVOC) impacts in the former source area and to redone the two downgradient biobarriers, which are serving as a permeable reactive barrier (PRB) to treat a portion of the dissolved plume. Groundwater monitoring conducted at the Site suggests that it is appropriate to plan for an additional injection in 2016. PROPOSED SCOPE OF WORK The proposed scope of work consists of semi-annual groundwater monitoring and reporting and related activities to be performed on behalf of IRC SWDD at the Former South Gifford Road Landfill. For the purpose of budgeting, the scope of work has been divided into the following tasks: • Task 1 —Project Management; • Task 2—Meetings/Regulatory Interaction; • Task 3 —Prepare RAPM Addendum No. 3; • Task 4—Annual Pollution Remediation Liabilities Evaluation; • Task 5 —Semi-Annual Sampling Activities; and • Task 6—Data Evaluation and Semi-Annual Reporting. The remainder of this section presents a general description of the activities to be performed in each task. XR 16005\XR 16001.docx engineers I scientists I innovators