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Mr. Himanshu H. Mehta, F.E. <br />2 June 2022 <br />Page 4 <br />Geosyntecp <br />consultants <br />Geosyntec will conduct a complete round of groundwater level measurements concurrent with each <br />semi-annual groundwater sampling event (budgeted for one day with two -person field team for each <br />event). Depth to groundwater measurements will be recorded to the nearest 0.01 -ft in each monitoring <br />well, including existing monitoring wells and applicable City of Vero Beach wells (assumed up to 95 <br />wells per event). Due to wet site conditions and difficult access to certain well clusters, costs for rental <br />of a utility phase vehicle are included for one day of groundwater level measurements and one day of <br />sampling per event (4 total days). <br />It is anticipated that purge water (investigation -derived waste [IDW]) will be containerized in 55 -gallon <br />polyethylene drums and temporarily staged on Site for characterization prior to removal and disposal. <br />Costs are included herein for purchase of one 55 -gallon polyethylene drum and for one-half day of <br />drum disposal oversight for one person. <br />Overall, for field activities, budget has been included for six field days with two persons, mobilization <br />time for field personnel, and associated field expenses for sampling. <br />Geosyntec will provide oversight for a contractor to clear brush in an approximate 6 feet radius around <br />select well clusters in conjunction with the winter 2022 groundwater sampling event to maintain access <br />to well clusters. Costs are included for one day oversight (with one person) and for subcontractor costs. <br />Phase 5 — Data Evaluation and Semi -Annual Reporting: Under this phase, Geosyntec will perform <br />data evaluation activities and reporting. The reporting includes preparation of one summer 2022 report <br />(simplified format) and one winter 2022 report for submittal to FDEP. <br />The summer 2022 report will be a letter report with attachments, including a monitoring well location <br />map and tables of the field and laboratory results. Data evaluation activities for the summer 2022 report <br />will include database management, screening results against applicable regulatory criteria, and <br />summary data table preparation. This report is due to FDEP by 31 July 2022. <br />The winter 2022 report will be consistent with the groundwater monitoring reports historically <br />submitted to FDEP for this Site and the data evaluation activities will include database management, <br />screening results against applicable regulatory criteria, GIS figure preparation, time trend analyses, <br />and/or statistical data analyses. The winter 2022 annual report will be supported by attachments <br />containing Chain -of -Custody sheets, field notes and observations, water sampling logs, maps, graphs, <br />analytical results, quantitative statistical evaluation, and other applicable materials. As part of the <br />statistical analysis, trend analysis graphs showing temporal concentrations of constituents and a <br />summary of the Mann -Kendall statistics will be included to identify increasing, decreasing, or no trends <br />in groundwater constituent concentrations. Historical data summaries will be included for monitoring <br />wells recommended for removal from the monitoring plan. <br />FR0766\XR22024.docx <br />engineers I scientists I innovators <br />