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Mr. Himanshu H. Mehta, P.E. 25 September 2020 Page 8 application of engineered phytoremediation techniques as a potential remedial approach. The temporary piezometers will be constructed of 2 -inch (in.) schedule (SCH) 40 poly -vinyl chloride (PVC) well materials including a 10 -slot (0.001 -in.) screen including a 20/30 graded silica sand filter pack, 30/65 graded silica sand seal and cement grout slurry to surface. The completion: interval of the temporary piezometers`: will be based upon the groundwater screening results. Each temporary piezometer will be completed with an above ground protective casing and three. steel bollards. Each temporary piezometer will be developed for a period of one hour either prior` to grouting or at least 24 hours after grouting. Slug testing will be completed at each of the three: (3) new temporary piezometers to estimate the aquifer permeability which is needed to evaluate. the groundwater velocity to assess remedial alternatives including groundwater extraction via Tree Well phytoremediation technology._ A single round of groundwater samples will be collected from each of the three (3) new, temporary piezometers for the parameters as required by paragraphs 62-701.510(5)(a) and (c), F.A.C., and will also include TN and TP. Additionally, a groundwater sample from each temporary piezometer will be submitted to ServiTech for analysis of select groundwater. agronomic test parameters to evaluate the feasibility of the application of engineered phytoremediation techniques as a potential remedial approach. The intention is to collect the temporary piezometer groundwater samples during the October 2020 quarterly C&D debris disposal facility assessment monitoring event. Any subsequent sampling at the three (3): temporary piezometers will be included in a subsequent proposal for the 2021 water -quality:; compliance monitoring program. The result of the supplement groundwater assessment will be summarized in a technical memorandum which will include: 1. Summary of field methods; 2. Summary of field and analytical laboratory results; 3. Evaluation of remedial options including feasibility of groundwater extraction via Tree Well phytoremediation technology; and 4. Recommendation for path forward for remediation. Geosyntec will oversee the DPT groundwater screening and HSA soil sampling and temporary piezometer installation. The subcontracted driller will be JAEE of Davie, Florida. Geosyntec 2 Groundwater agronomic parameters to be analyzed by ServiTech will include: nitrate -nitrogen, chloride, sulfate - sulfur, carbonate, bicarbonate, calcium, magnesium, sodium, potassium, boron, total hardness, total dissolved solids, alkalinity, electrical conductivity, sodium adsorption ratio (SAR), adjusted SAR (SARa), sodium, % of cations, water pH, pHc, nutrients in Ib/acre-foot, potassium as K20, ammonia, phosphorus as P205, total nitrogen (Calc), total phosphorus, total Kjeldahl nitrogen. NCP2020 3158/JL200925 2020 Compliance Monitoring Proposal