2023-146 - Laserfiche WebLink

Home Browse Search

Mr. Himanshu H. Mehta, P.E. 2 June 2023 Page 4 Geosyntec" consultants scheduled for December 2023) will include sampling of 42 monitoring wells (31 using PDBs and 11 wells via traditional purging techniques) to collect field water quality parameters. The Winter 2023 field event is budgeted to include a total of 3 days (with 2 persons) for groundwater sampling activities and PDB deployment for the Summer 2024 field event. Consistent field documentation and field protocols will be utilized to develop reliable data to support the natural attenuation evaluation for the groundwater plume. The groundwater samples will be analyzed in accordance with the sampling plan summarized in the 2022 Annual Groundwater Monitoring Report. Quality control samples are proposed to be collected at a rate of 5% of total samples as required by the most recent FDEP SOPs. Geosyntec will conduct a complete round of groundwater level measurements concurrent with each semi-annual groundwater sampling event (budgeted for 1 day with 2 -person field team for each event). Depth to groundwater measurements will be recorded to the nearest 0.01 -ft in each monitoring well, including existing monitoring wells and applicable City of Vero Beach wells (assumed up to 95 wells per event). Overall, for field activities, budget has been included for 7 field days with 2 persons, mobilization time for field personnel, and associated field expenses for sampling. Due to wet site conditions and difficult access to certain well clusters, costs for rental of a utility phase vehicle are included for 1 day of groundwater level measurements and 1 day of sampling per event (4 total days). It is anticipated that purge water (investigation -derived waste [IDW]) will be containerized in a 55 - gallon polyethylene drum and temporarily staged on Site for characterization prior to removal and disposal. Costs are included herein for purchase of one 55 -gallon polyethylene drum, drum removal and disposal by a licensed subcontractor, and for 4 hours of drum removal oversight for 1 person. Phase 5 — Data Evaluation and Semi -Annual Reporting: Under this phase, Geosyntec will perform data evaluation activities and reporting. The reporting includes preparation of the Summer 2023 report (simplified format entitled Summer 2023 Semi -Annual Groundwater Sampling Results) and the Winter 2023 report (2023 Annual Groundwater Monitoring Report) for submittal to FDEP. The Summer 2023 report will be a letter report with attachments, including a monitoring well location map and tables of the field and laboratory results. Data evaluation activities for the Summer 2023 report will include database management, screening results against applicable regulatory criteria, and summary data table preparation. This report is due to FDEP by 31 July 2023. The Winter 2023 report will be consistent with the groundwater monitoring reports historically submitted to FDEP for this Site and the data evaluation activities will include database management, screening results against applicable regulatory criteria, GIS figure preparation, time trend analyses, and/or statistical data analyses. The Winter 2023 annual report will be supported by attachments containing Chain -of -Custody sheets, field notes and observations, water sampling logs, maps, graphs, analytical results, quantitative statistical evaluation, and other applicable materials. As part of the FR0766\XR23010.docx engineers I scientists I innovators