What are the key things to know about this site?
TCE was first detected in municipal water supplies
in 1997. In 2003 the City
of
Dyno Nobel, an industrial facility near BOPU’s municipal well field also began detecting TCE in its water supply in September of 1993. TCE is known to have been disposed of at Missile Sites throughout Laramie County, including Missile Site 4, in the 1960’s. WDEQ and the City of Cheyenne believe TCE-contaminated groundwater is due to disposal of TCE at Missile Site 4. No other source of TCE has been identified.
The lateral extent of TCE-contaminated groundwater extends approximately ten miles east, or down-gradient (down-stream) of Missile Site 4. The vertical extent of TCE-contaminated groundwater extends to depths of 300 feet below land surface.