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22 May 2013 AGE Project No, 11 - 1847 Page 6 of 6 of the filter pack, the well will be surged to assist filter pack settling . Additional sand will be added if settling occurs . A nominal 4-foot bentonite seal (TR-30 coated pellets) will be placed above the filter pack to minimize the potential for grout penetration into the screened section of the well . The bentonite seal will be formed by pouring bentonite pellets into the annular space between the hollow-stem augers and well casing and allowing them to settle on the filter pack. Bentonite pellets will be hydrated a minimum of 30 minutes or as specified by the manufacturer prior to grouting using five gallons of water. Remaining annular space above the bentonite seal will be filled to within one foot of the ground surface with a cement grout . The grout mixture will consist of Type III I portland neat cement and not more than 6 gallons of water per 94-pound sack of cement. Grout will be placed by pumping through tremie pipe . A stove-pipe will be installed over the well casing to prevent the well from being buried due to natural or unforseen causes and will be locked to prevent accidental filling . The SJCEHD will be notified for grout inspection at least 48 hours prior to conducting grouting procedures. 3 .4 . WELL DEVELOPMENT AND SURVEY Development will consist of a combination of bailing to remove the major portion of fine- grained sediment from inside the well , surging to flush out or draw in sediment from the filter pack, and additional bailing to finish the removal of sediment. Development activities will be continued until field parameter (pH , electrical conductivity, and temperature) readings have stabilized . Additionally, each well head elevation and GPS location coordinate will be surveyed by a licensed surveyor. 3.5 . EQUIPMENT DECONTAMINATION/WASTE MANAGEMENT All sampling tools used for sample collection, except for disposable bailers , will be thoroughly rinsed with clean water after being washed with a solution of Alconox. All down- hole drilling equipment will be pressure washed prior to starting each boring . Cuttings generated during drilling and rinseate generated during drilling and groundwater sampling activities will be containerized in properly labeled DOT-approved 55-gallon drums , and stored on-site in an area lacking public access. Disposal alternatives will be evaluated based on results of soil and water analysis . Advanced GeoEnvironmental, Inc.