the observation well 25 m distance i have observed changes of 3m in the water level of the observation well sometimes air is bubbled from the water in the observation well thus i have concluded that there is a development not only in the immediate vicinity of the well being developed but there is a development in the washing and flushing of the aquifer for many meters in every direction from the well it may be analyzed that if there is 60 feet 18 meters of water over the ring 28 and the pressure is from at least 170 atmosphere absolute to 150 atmosphere absolute that there would be 15 cubic meters at atmospheric pressure released under pressure existing in the well this would be about 5 cubic meters of air released at this pressure the air is released within a 10 second period and as may be seen there is a tremendous velocity of fluid movement within the bottom of the well during all of the development period and during the time the blast of air being injected at the bottom of the well the airlift pump continues to lift it is not necessary that the airlift pump produced large volumes of.