"Industrial sludge " means any sludge
produced by industrial activity.
"Land application " means a method through
which sludge is applied to the ground surface. Land application may include
subsurface injection.
"Sewage sludge" is defined in 567-Chapter
67.
"Sludge " means any solid, semisolid, or
liquid waste generated from a commercial or industrial wastewater treatment
plant, water supply treatment plant or air pollution control facility or any
other such waste having similar characteristics and effects.
"Solid waste" means garbage, refuse,
rubbish, and other similar discarded solid or semisolid materials, including
but not limited to such materials resulting from industrial, commercial,
agricultural, and domestic activities. Solid waste may include vehicles, as
defined by Iowa Code section
3211.,
subsection 1. Nothing herein shall be construed as prohibiting the use of dirt,
stone, brick, or similar inorganic material for fill, landscaping, excavation,
or grading at places other than a sanitary disposal.
"Stabilized sludge" means sludge that has
been processed to a point where it has the ability to resist further change,
produces minimal odor, and has achieved a substantial reduction in the
pathogenic organism content. (The department recognizes principles of
stabilization other than the conventional biological processes. Whether these
processes produce a stabilized sludge will be evaluated on an individual
basis.)
