41.  The ground is laced with limestone so there are subterranean conduits and caverns that allow underground water to flow freely.

42.  The southern portion of the Edwards Aquifer, a vast underground water sourcethat provides drinking water to San Antonio and surrounding cities, is finally starting to refill.

43.  The use of underground water in Bastrop and Lee counties would be regulated for the first time under legislation introduced Thursday.

44.  This might turn out to be the more stringent standard, because releases into underground water are expected to be the biggest pathway to exposure.

45.  To hedge against a series of bad years, the state has been using surplus water to create underground water banks that could be drawn on later.

46.  To make up the deficit, Beijing has resorted to overpumping of underground waters, Zhang said.

47.  To make up the deficit, Beijing has resorted to over-pumping of underground waters, Zhang said.

48.  Ultimately, Kendall said, the magnitude of the danger would depend on the flow rates of underground waters.

49.  Underground water flows downstream from that site to the Cockrell farm.