Section 905.10  Definitions

In addition to the definitions contained in the Private Sewage Disposal Licensing Act [225 ILCS 225], the following definitions shall apply:

            "Aerobic Treatment Plant" means equipment or devices for the treatment of sewage by the forced addition of air or oxygen.

            "Ag. Experiment Station" means the University of Illinois Agricultural Experiment Station.

            "Approved" or "Approval" means accepted by or acceptable to the Department or local authority.

            "ASTM" means the American Society for Testing and Materials.

            "Building Sewer" means that part of the horizontal piping of a drainage system which extends from the end of the building drain, receives the discharge of the building drain and conveys it to a public sewer, private sewer, individual sewage disposal system, or other point of disposal.  The building sewer commences 5 feet outside the building foundation wall.

            "Common Collector" means an underground, enclosed conduit designed to carry treated sewage effluent exclusive of stormwater from 3 or fewer properties provided the combined treated sewage effluent is less than 1500 gallons per day and has a surface discharge.  An example of a common collector is a solid plastic pipe installed to carry treated sewage effluent from 2 or 3 discharging systems with a combined design flow of less than 1500 gallons per day.  Examples of what is not a common collector are road ditches, field ditches, curbs and gutters, grassed waterways, concrete or other lined drainage ways.

            "Component" means an integral part of a private sewage disposal system that is necessary for the satisfactory design, construction and operation of the system.

            "Effective Size" means the size of screen opening where 90 percent by weight of a sample of filter media is retained on the screen and 10 percent passes through the screen.

            "Gravelless Seepage System" means the use of approved perforated 8 inch or 10 inch diameter, filter wrapped, plastic pipe, in lieu of 4 inch pipe and gravel, in subsurface fields and serial distribution systems.

            "Hot Tub" means an artificial container of water with a liquid capacity greater than 100 gallons and designed with a mechanical air injection system and/or recirculating device.  These devices may filter and/or disinfect the water for reuse and are not intended to be drained between uses.

            "Limiting Layer" means a horizon or condition in the soil profile or underlying strata which includes:

            A seasonal high water table, whether perched or regional, determined by direct observation of the water table or indicated by soil mottling where common mottles comprise at least 2% to 20% of the soil, in a progressive downward direction in the soil.

            Masses of loose rock fragments, including gravel, with insufficient fine soil to fill the voids between the fragments.

            Rock formation, other stratum or soil condition which is so slowly permeable that it effectively limits downward passage of effluent.

            "Liquid Capacity" means the volume of a tank below the invert of the outlet line.

            "Local Authority" means a local unit of government which enforces a private sewage disposal ordinance which has been approved by the Department; or a local health department which has been designated an agent of the State for conduct of the Private Sewage Disposal Program.

            "Non-Residential Property" means any property that is not residential property.

            "NRCS" means the USDA Natural Resource Conservation Service.

            "NSF" means the National Sanitation Foundation, an independent testing laboratory.

            "Residential Property" means a single family home or multi-family unit intended for occupation as living quarters that is not used to conduct any business that generates wastewater or domestic sewage.

            "Septage" means the solid and liquid wastes removed from private sewage disposal systems.

            "Shall" means the stated provision is mandatory.

            "Soil Boring" means an observation pit, dug by hand or backhoe, or an undisturbed soil core taken intact and undisturbed by a probe.

            "Soil Classifier" means one of the following:

            A certified soil classifier of the Illinois Soil Classifiers Association (ISCA) or a certified soil classifier with the American Registry of Certified Professionals in Agronomy, Crops and Soils (ARCPACS).

            A person who is a full member or associate member of the Illinois Soil Classifiers Association (ISCA), provided that direct supervision is provided to this person by an ISCA or ARCPACS certified soil classifier who accompanies the person on at least 25% of the soil investigations and reviews and signs all of that person's soil investigation reports.

            "Subsurface Seepage System" means a subsurface seepage field, seepage bed, or an 8 inch  or 10 inch  gravelless seepage system.

            "Uniformity Coefficient" means a number obtained by dividing that size of sand in millimeters of which 60% by weight is smaller, by that size of sand in millimeters of which 10% by weight is smaller.

            "Wastewater Source" means any equipment, facility, or other source of any type whatsoever that discharges wastewater, directly or indirectly, to the waters of the State.

            "Water Table" means the upper limit of the portion of the soil which is completely saturated with water.  The seasonal high water table is the highest level to which the soil is saturated, as may be indicated by mottling (soil color patterns).

Soil science terms used throughout the text of this Code are defined in the Glossary of Soil Science Terms (July 1987) unless otherwise defined.

(Source:  Amended at 20 Ill. Reg. 2431, effective March 15, 1996)