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.
inorganic arsenic or organic arsenic. 1  Inorganic forms of arsenic are found in soil, rock, and water. 2  Organic forms of arsenic are generally much less harmful to people than inorganic forms, and some are considered relatively risk free.se of drinking water containing more than 200 micrograms of inorganic arsenic per liter over many years has been linked to problems with the skin, blood circulation, lungs, and the nervous, immune and endocrine systems.