With urban sprawl and suburban population growth, crop and farm land has undergone a transformation into industrial complexes and new communities. Former agricultural operations can pose pollution risks to the environment and human health. Pesticides, herbicides, and fertilizers used on crops as well as legacy on site farm waste disposal and sewage sludge application can leave residues in the soil or make their way into various waterways. Before development can begin, the property will be assessed, and areas of concern tested for potential contamination. Regulatory testing for agricultural land development can include pesticides, herbicides, dioxins, and heavy metals.