Penalty. Legend Natural Gas IV, LP, Respondent owned or operated two oil and gas production facilities located on the Mitchell Ranch Unit in Grnadbury, Hood County, Texas, and was therefore an owner or operator . the facility was a point orce of dischargs of pollutants, specifically oil field brine and produced wastewater, to the receiving waters of tributary of Walnut Creek and Nolan Branch, which are considered waters of the United States . On February 27, 2013 and May 2, 2013 was inspected by an EPA Inspector that determined that the water located at the discharge point of entry into the tributary was contaminated from oil field brine and produced wastewaer.