St. Helens Chronicle. The St. Helens woman has been missing for two weeks. Her boyfriend, currently in the Lane County jail for other offenses, is now considered a person of interest. Police are currently searching for St. Helens woman, Cheryl Hart, who has been missing for nearly two weeks.
First, there are typically two varieties, or species, of arsenic in water: arsenic 3 and arsenic 5.. This is significant because arsenic 3 is very difficult to remove from water and must be changed or oxidized to arsenic 5 before it can be removed.
Arsenic contamination of ground water is found in many countries throughout the world, including the USA. Approximately 20 major incidents of groundwater arsenic contamination have been reported.Of these, four major incidents occurred in Asia, in Thailand, Taiwan, and Mainland China.Note that arsenic oxide, As 2 O 3, is a common form of arsenic in groundwater that is soluble, but has no net charge.) Some utilities presently use one of these methods to reduce total dissolved solids and therefore improve taste.