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Mr. Terry Southard <br /> 16 December 2008 <br /> Page 3 <br /> Task 2 — Site Assessment Field Drilling/Sampling Activities <br /> 1st Mobilization <br /> • Mobilize to the site and provide oversight of the installation up to five , '/4- inch temporary <br /> monitoring wells to a depth of 8 to 10 ft below land surface (BLS - depth to groundwater <br /> estimated at approximately 5 ft BLS) north , south, and/or west of the area with pH and <br /> sodium impacted groundwater using hand auger equipment to supplement the previously <br /> installed wells in an effort to provide lateral delineation of the previously identified area <br /> of sodium impacted groundwater . Note : For clarification the goal of the proposed field <br /> activities is for the delineation of sodium impacted groundwater and not for the <br /> delineation of pH impacts . <br /> • Provide oversight of the installation of the FDEP-approved background monitoring well <br /> (as proposed in Geosyntec ' s in 7 August 2008 letter report) by a licensed water well <br /> subcontractor . The monitoring well will have a '/4 - or 1 - inch diameter PVC casing and <br /> pre-packed screen and will be finished within a protective flush-mounted manhole cover . <br /> Note that macro-core soil sampling will be conducted prior to installation of the well and <br /> soil samples will be visually characterized by the Geosyntec field representative <br /> (enabling the preparation of a lithologic cross section , which is a Chapter 62 -780 , FAC , <br /> SAR requirement) . <br /> • Collect a complete set of groundwater level measurements and collect groundwater <br /> samples from existing monitoring wells MWO1 and MW02 , the five proposed temporary <br /> monitoring wells, and up to 11 existing piezometers for the FDEP-required analytical <br /> suite (dissolved solids , chloride, sodium and sulfate) . As required by the FDEP, all <br /> groundwater samples proposed herein will be laboratory analyzed for dissolved solids by <br /> EPA Method 160 . 3 , chloride and sulfate by EPA Method 300, sodium by EPA Method <br /> 6010 , sulfate, and field screened for pH, temperature, specific conductance, turbidity and <br /> dissolved oxygen . <br /> 2 "d Mobilization <br /> After reviewing the information obtained from the I " mobilization described above , Geosyntec <br /> will conduct the following on -site activities during a 2nd mobilization to the site . <br /> • Provide oversight of the installation of three permanent shallow- screened monitoring <br /> wells (approximate depth of 13 -ft BLS) , in an effort to provide horizontal delineation of <br /> sodium (and dissolved solids, chloride, and/or sulfate , if detected) impacted groundwater <br /> to the north , south, and west of the sodium- impacted area currently identified above the <br /> associated screening limit . Macro-core soil sampling will be conducted prior to <br /> installation of the wells and soil samples will be visually characterized by the Geosyntec <br /> field representative . Note that well installation(s) may be located within approximately <br /> FR 1329/XR08264 .DOC <br />