Zoning restrictions are rare in the state , and Carman said there have been thousands of complaints from neighborhoods in areas like Houston , Beaumont and Corpus Christi , home to numerous oil refineries . West ##field reported having 270 tons of potassium nitrate on site in 2008 . The declaration reported to state and local agencies but not federal agencies . The company did n't mention the volatile fertilizer in its marketing plans .
West ##field reported having 270 tons of potassium nitrate on site in 2008 . The declaration reported to state and local agencies but not federal agencies . The company did n't mention the volatile fertilizer in its marketing plans .