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ij <br /> 05 February 2015 <br /> AGE Project No . 07-1529 <br /> Page 4 of 5 <br /> A three-foot bentonite seal will be placed above the filter pack to minimize the potential <br /> for grout penetration into the screened section of the wells . The bentonite seal will be <br /> formed by pouring bentonite pellets into the annulus and allowing them to settle on the <br /> filter pack. The bentonite pellets will be allowed to hydrate for the duration of time <br /> specified by the manufacture , prior to grouting . The remaining annular space will be <br /> filled to within one foot of the ground surface with a cement grout. The grout mixture will <br /> consist of Type 1/II Portland neat cement and not more than 6 gallons of water per 94- <br /> pound sack of cement. The grout will be placed by pumping through a tremie pipe or <br /> auger. A grouting inspection will be scheduled with EHD personnel prior to any <br /> application of grout. <br /> WELL DEVELOPMENT <br /> Development of the proposed wells will consist of a combination of bailing with a <br /> stainless steel bailer to remove the major portion of fine-grained sediment from inside <br /> the well , surging to flush out or draw in sediment from the filter pack, and additional <br /> groundwater evacuation with a Waterra inertia pump to finish the removal of fine- <br /> grained sediment . Developmental purging activities will be continued until field <br /> parameters (pH , electrical conductivity, and temperature) have stabilized and purged <br /> water is visually sediment-free. <br /> EQUIPMENT DECONTAMINATIONIWASTE MANAGEMENT <br /> All sampling tools will be thoroughly rinsed with clean water after being washed with a <br /> solution of Alconox . All down -hole drilling equipment will be pressure washed prior to <br /> starting each boring . Rinseate and soil cuttings generated during drilling and future <br /> groundwater sampling activities will be containerized in properly labeled , Department of <br /> Transportation ( DOT)-approved 55-gallon drums and stored on-site in an area lacking <br /> public access . Disposal alternatives will be evaluated based on the results of analysis . <br /> Advanced GeoEnviron mental, Inc. <br />