On the afternoon of April 11 th , 2012, local residents living near Oak Creek in Corvallis, Oregon noticed a strange and unpleasant smell coming from the creek and called the city’s Public Works Department. The source of the contamination was traced back to the dairy farm at the local university, where an irrigation pipe carrying a manure and water mixture to pasture land had ruptured. The problem was eventually fixed, but not until the

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