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.
Pure arsenic is a metal and is rare in the environment; arsenic is usually found combined with one or more other elements, such as oxygen or chlorine. Arsenic is also produced as a by-product from the operation of copper, cobalt, and lead smelters. Abandoned uranium mines may contain arsenic in the soil and water.