Dave Gustafson knows firsthand how puzzling the regulations regarding the land application of biosolids can be. Gustafson, an educator with the University of Minnesota Extension onsite wastewater treatment education program, fields questions often from pumpers wanting to know just what they can and cannot do.Biosolids are the organic solid product produced by wastewater treatment processes that can be recycled by applying it to land to condition the soil or fertilize crops or other vegetation. Nearly half of all biosolids are used in this way, with the remainder incinerated or held in surface storage units, according to the Environmental Protection Agency.The
