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c , t r r 20 September 2001 AGE-NC Project No 96-0235 ' Page 7 of 8 hydrated using five gallons of potable water The casing, filter pack and well-sealing materials will ' be placed into the borehole through the intenor of the hollow-stem augers The remaining annular space will be filled within one foot of surface grade with a cement grout The out mixture will consist of Type 911 portland neat cement and not more than 6-gallons of water per- ' - 94-pound sack of cement The grout will be placed by pumping through the hollow stem augers The ' PHS-EHD will be notified at least 48 hours before initiation of field work to schedule the grout inspection A traffic-rated well box will be installed over the well, in. accordance with county regulations A proposed well construction diagram is depicted in Figure 3 3 3 24-HOUR AQUIFER PUMPING TESTS , A submersible water pump will be utilized to induce a decline in static water level in extraction wells EW-1 and EW-2 during seperate 24-hour aquifer pumping tests Sohnst Levelogger transducers will ' be deployed in wells EW-1, MW_10, MW-11A and MW-6A during the EW-1 pumping test and in " wells EW-2, MW-2, MW-1 and MW-8B during the EW-2 pumping test Information recorded on R the transducers will be used to obtain drawdown measurements at 1-minute intervals to measure differences in ground water levels before and during well pumping Additionally, depth to water measurements from the mentioned wells will be recorded every 30 minutes using a Solmst water level meter Depth to water will also be monitored from outboard wells with the Sohnst to detect natural water level movements - AGE plans to utilize 4 Levelogger Model 3001 instruments to collect the water level data The _ Levelogger's utilize ceramic pressure transducers to measure water levels The devises record the information during the test and can be downloaded to a computer via an RS232 Optical infra-red data reader/port connected to the computer On 19 July 2001 an 8-hour aquifer pumping test was conducted utilizing EW-2 as the extraction well Based on the results of the 8-hour pumping test, a constant ground water pumping rate of - ' 4 gallons per mini to(GPM)willbe utilized for the 24-hour aquifer pump test proposed for the UST No 3 location A constant ground water pumping rate will be determined for the former UST cluster ' location from the results of the 8-hour pump test proposed in Feasibility Pilot Test Work Plan,dated 31 January 2000 The ,ground water will be extracted utilizing a submersible, 4-mch diameter Grundfos Rediflow self priming submersible pump If the decline of the ground water level is not satisfactory within the first eight hours of the;pilot test, additional testing will be performed to achieve sufficient ground water drawdown Advanced GeoEnviranmental,Inc j ` l