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.
If the arsenic level in your well water is above 10 ppb there are a number of treatment methods available. However, before selecting a treatment method, there are a number of factors that need to be considered. First, there are typically two varieties, or species, of arsenic in water: arsenic 3 and arsenic 5..