This is an updated version of the product training course introduced by SUPPLY HOUSE TIMES in 1979, authored by Don Arnold.
(Note: As a point of technical clarification, the term “contamination” refers to an impairment of the water quality that would cause a hazard to the public health through poisoning or disease {sometimes referred to as “high hazard”}. “Pollution,” on the other hand, is an impairment of the water quality which, though undesirable, would not create a health hazard {sometimes referred to as “low hazard”}.)