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6.2 PUMP TEST PROCEDURES _ A 1.20 hour, 5 day, pump test will be conducted as Follows: RECOVERY WELL MW-3 BORING DIAMETER 0.83 FEET BORING DEPTH 65 FEET BELOW THE SURFACE CASING DIAMETER 4 INCH SLOT INTERVAL 35 FEET TO 65 FEET BFLOW THE SURFACE SLOT SIZE 0.020 INCH SAND PACK TYPE #3 MONTEREY SAND AVERAGE WATER DEPTH 53FEET BET JMWTHEMWURFACE, l4W7, NWB, OBSERVATION WELLS MW9 & MW10 Prior to pumping, depth to ground water measurements will be ! obtained from all monitor wells. Then, pressure transducers will be placed in monitor wells HW 4, MW8, and NW10 near the 65 s foot depth and hooked to a recorder that registers differences in head, hydraulic to a 0.01 foot accuracy, over time on a data logger. A pump rate of 2000 gallons/day (1.4 gallons/minute) will be maintained during the pump test on monitor well MW-3. The pump, a pneumatic type, will be powered by the RSI S.A.V.E. unit. It will pump the ground water into a 4000 gallon polytank. The RSI S.A.V.E. unit will then pump and treat the ground water from the polytank and deliver it to a 21 >000 gallon fracan for ; storage. Depth to ground water measurem.nts will be taken on ; (" all the wells without the transduces every hour during the first five hours of the pump test and tilts daily for the duration of the test. Once pumping has cessfd; the recovery rates for f all the monitor wells will be recorded using the transducers and or depth to water -cbes as mentioned above. From this data, time drawdown curves will to plotted £ hSe observation forunconfined Using time and distance drawdown type curves aquifer, WEGE will calculate transmissivity and storage ? coefficient values. A ground water modeling program will use i these values to determine the recovery rate and wells needed to capture the contaminant plume. 7.0 HEALTH AND SAFETY This site is being treated as a class D site, and normal common sense is to be used (see Appendix. E, Health and Safety Plan). 3 i i 30