Twin City Foods will be building pretreatment facilities to mitigate for the effects of hydraulic overloading in the sprayfield it operates in Ellensburg, WA.

The site photo below was taken in 1997 It depicts one of the last sprayfields to go into anaerobic failure in Washington State. Before this time, sprayfield designs tended to ignore application uniformity and soil moisture effects on BOD treatment capacity. In most sprayfields, loading of oxygen demanding constituents is not a design limiting parameter, and warrants abbreviated consideration. That is not the case with high strength wastewater, and professional judgement is required to distinguish when further consideration is warranted.  When in doubt, have a qualified soil scientist evaluate soil-based BOD treatment capacity.