ARSENIC TRIOXIDE SITE
Superfund Site Profile
The Arsenic Trioxide site is located in Richland and Sargent counties in southeastern North Dakota. It covers 26 townships (about 568 square miles) of sparsely populated farmland with a few small towns, including Lidgerwood, Wyndmere, Milnor and Hankinson.
During the 1930s and early 1940s, arsenic-laced bait was used extensively throughout North Dakota to combat grasshopper infestations. The bait, which included arsenic trioxide, sodium arsenate, Paris Green and other arsenic compounds, was commonly applied on farm fields.
EPA conducted a remedial investigation (RI) in 1985 to determine the nature and extent of arsenic contamination in groundwater. The RI identified several groundwater wells that ...
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