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t . <br /> EOSYNTEC CONSULTANTS <br /> Mr. Tanhum Goldshmid <br /> Indian River County, Solid Waste Disposal District <br /> 3 May 2005 <br /> Page 5 <br /> • GR-MW30CC screened form 75 to 85 ft BLS and intended to monitor CVOC <br /> concentrations immediately above the confining layer in an area where hi torical DPT <br /> sampling revealed elevated cDCE concentrations (immediately down adient from <br /> excavated source area) ; and <br /> • GR-MW30VE a double-cased monitoring well screened from 105 to 11 C ft BLS and <br /> intended to monitor the vertical extent of the CVOC plume in the formersource area. <br /> The proposed monitoring wells identified above are intended to complete the <br /> monitoring network in the vicinity of the site and, as requested by FDEP , monitor CVOCs <br /> near the source area above and below the confining layer previously identified at the site . <br /> The well installation and development will be conducted in accordance with FDEP <br /> Standard Operating Procedures (SOPS) . Under this task, GeoSyntec will coordinate with <br /> FDEP for approval of the proposed well locations and screened intervals and to establish <br /> appropriate well construction details . This effort may include submission of applicable <br /> supporting data (grain size distribution analyses , in- situ hydraulic conductivity testing, <br /> depth to water, etc . ) to FDEP . <br /> This task will involve the installation of five (5 ) monitoring wells with a drill rig <br /> equipped with hollow stem auger (HSA) capabilities . The two deeper proposed monitoring <br /> wells, GR-MW30CC and GR-MW30VE, will be installed with mud rotary techniques, <br /> with GR-MW30VE completed as a double-cased monitoring well . The monitoring wells <br /> will be developed by surging and over-pumping. Protective barriers (i . e . , bollards) will be <br /> installed around each proposed monitoring well or well cluster that may be subject to <br /> damage by heavy equipment or traffic . After installation, each proposed monitoring well <br /> will be surveyed by a Florida Registered Professional Land Surveyor. Additionally, <br /> recently installed former source area monitoring wells GR-MW30A and GR-NIW30B will <br /> be surveyed. <br /> The budget estimate for this task also includes labor for waste characterization ; <br /> however, actual disposal of the waste will be handled by IRC as discussed below. With <br /> respect to investigation-derived waste (IDW) generated during GeoSyntec ' s fieldwork at <br /> the site, GeoSyntec will drum the drill cuttings and development/purge water, stage the <br /> drums on- site, and mark each drum to indicate the source of the waste ( . g. , boring <br /> XR05010 IRC MPIS-PM Sampling\R050001J-rev.doc <br /> RECYCLED AND RECYCLABLE r <br />