Hitting the payload

My work centers around advising people where to drill wells, testing the wells for adequacy of supply and quality and explaining how it works in public forums. There are numerous misconceptions regarding the behaviour of groundwater in the Piedmont and Valley ridge provinces. But we're not going to get into that here-

Three weeks ago I was hired to find high yielding well in a particularly tough (geologically speaking) area of Virginia. Success  requires (1) experience, (2) a methodical approach and (3) commitment of time and resources. In this particular situation the work resulted in a well that possessed an "airlift yield" of approximately 250 gallons per minute -