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.
Exposure to arsenic in drinking water has been identified as a health concern in regions of the United States where bedrock contains unusuÂ­ally high levels of arsenic, such as areas of New Hampshire, Maine, Michigan, and regions in the Southwest and the Rockies.