Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 391 - DESIGN CRITERIA FOR SLUDGE APPLICATION ON LAND › Subpart A - INTRODUCTION AND DEFINITIONS › Section 391.102 - Definitions

Current through Register Vol. 48, No. 28, July 12, 2024
"Agronomic Rates for Sludge Application": An application rate
				  of sludge sufficient to supply that quantity of plant nutrients that can
				  reasonably be expected to be utilized by agricultural crops as determined
				  pursuant to Section
				  391.410.
"Application": The placement of sludge on or under the land
				  surface.
"Cation Exchange Capacity": The sum of exchangeable cations a
				  soil can absorb expressed in milli-equivalents per 100 grams of soil as
				  determined by the summation method for distinctly acid soils or the sodium
				  acetate method for neutral, calcareous or saline soils.
"Digested Sludge": Sludge digested under either aerobic or
				  anaerobic conditions until the volatile content has been reduced to the point
				  at which the solids are relatively nonputrescible and inoffensive.
"Dried Sludge": Sludge that has been dewatered by a
				  mechanical device, drying beds or other means such that it can be transported
				  and handled as a solid material. Normally, this will be a minimum of 15% total
				  solids.
"Heavy Metals": Metals with a high specific gravity,
				  including but not limited to cadmium (Cd), copper (Cu), lead (Pb), zinc (Zn),
				  chromium (Cr), mercury (Hg), nickel (Ni).
"Incorporation": To mix sludge with the soil, concurrent with
				  application, in the upper horizon by such means as injection, discing, or
				  plowing.
"Liquid Sludge": Sludge that is readily pumpable and must be
				  transported by a closed vessel. Normally, this will be a maximum of 8% total
				  solids.
"Management Scheme or Management Plan": A program devised by
				  a sludge generator or user that specifies how they will properly transport,
				  store and dispose of sludge for which they are responsible. This would include
				  but not be limited to on-site or off-site storage, seasonal operation, with all
				  proposed disposal techniques and criteria to be followed.
"Natric Soils": Soils having 15% or more millequivalents of
				  exchangeable sodium within the solum.
"Off-Site Interim Storage": The storage of sludge off the
				  treatment plant site from where it was generated but does not include sludge in
				  the transporting vehicle.
"Plant Nutrients": Those forms of nitrogen, phosphorus,
				  potassium and micro-nutrients which are absorbed by agricultural crops and
				  provide the necessary food for the plant's maintenance and growth.
"Public Distribution": A program by a sludge generator that
				  allows the general public to obtain sludge for individual use but does not
				  include sludge users who may be under contract with the sludge generator or
				  persons receiving sludge for commercial agricultural use.
"Reclamation": The improvement of disturbed soils by addition
				  of sludge materials which would allow the establishment and maintenance of
				  vegetation.
"Sludge Distributor": A sludge user who is not a sludge
				  generator but who sells or gives away sludge regardless of its origin.
"Sludge Generator": A person who produces sludge by treating
				  water or wastewater by a treatment works or pretreatment works.
"Sludge User": A person who obtains sludge from a sludge
				  generator for application on his land or land under his control.
"Stabilized Sludge": The product of biological, chemical,
				  heat or other type of sludge treatment that results in a relatively
				  nonputrescible and inoffensive material.
"Utilization": The application of sludge on land for
				  agricultural, horticultural, silvicultural, or other beneficial purposes at
				  such rates that the nutrients can be expected to be utilized by plant
				  growth.