The first inequality means that the distance between x and c is greater than 0 and that x â  c, while the second indicates that x is within distance Î´ of c. Note that the above definition of a limit is true even if f(c) â  L. Indeed, the function f need not even be defined at c.
Once inside a hot water heater, however, Legionella bacteria multiplies and is conveyed through the household plumbing, where it may be inhaled in the aerosol mist that accompanies showering, bathing or even washing dishes in a sink. Very young children and elderly people are particularly at risk.
Section II:C-1. Domestic Hot-Water Systems. Legionnaires' disease has been associated with domestic hot-water systems in a number of outbreaks. Large water heaters like those used in hospital or industrial settings frequently contain cool zones near the base where cold water enters and scale and sediment accumulate. Control Strategy: How to maintain a hot-water system