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1 clean filter pack material to approximately 2 feet above the slotted casing Filter pack material will <br /> be chosen based on field conditions Approximately 2 feet of bentonite pellets will be placed above <br /> the sand pack Prior to grout placement, the hentonite seal will be hydrated for at least 30 to 45 <br /> minutes The grout will consist of a mixture of 95 percent neat cement and 5 percent bentonite The <br /> ' minimum setting time for grout prior to well development activities will be 24 hours <br /> ' Concrete will be placed in the annulus above the cement bentonite grout for added strength <br /> and to construct a flush mounted Christie box Each well will be marked to establish a top of casing <br /> ' (TOC) reference point for measuring ground-water depths The wells will be completed with a traffic <br /> rated protective well head box with a moisture and tamper-resistant lid Well head boxes will be set <br /> ' 1 to 2 inches above grade, with a finished, raised, concrete apron surrounding it to minimize the <br /> entry of surface runoff into the well Each well will be capped with a locking water-tight cap upon <br /> ' completion of well construction activities <br /> ' 3.34 Ground-Water Monitoring Well Development <br /> Well development will begin no sooner than 24 hours after the monitoring well is installed <br /> and cement bentonite grout seal is placed in the well annulus Each well will be developed by <br /> ' surging and pumping, or surging and bailing Surging will consist of forcing water in and out of the <br /> screened interval with a close fitting bailer or surge block A bailer will be used to remove debris <br /> accumulated in the well Once debris is no longer accumulating from surging activities, the well will <br /> be developed by continued bailing or pumping Well development water will be periodically <br /> monitored for turbidity, conductivity, pH, and temperature as development proceeds Well <br /> development will continue until turbidity, conductivity, pH, and temperature have stabilized and a <br /> minimum of 5 well volumes of ground water have been removed from each well Well development <br /> ' will not extend beyond a period of 4 hours Development water will be contained in DOT 17H 55- <br /> gallon drums <br /> 1 <br /> 3.3.5 Surveying of Well Locations <br /> 1 <br /> Each well will have its unique identification code marked on the well cover A survey will be <br /> ' performed by a licensed surveyor upon completion of the ground-water monitoring wells to locate <br /> SAMPLAN 162 <br /> 044 2 0162UCATRI-05M 17 <br /> I 1 <br />