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 Fertilizer reported having 270 tons of ammonium nitrate on hand in February . The declaration went to state and local officials but not federal agencies . The company did n't mention the volatile fertilizer in EPA risk plans .