35 Ill. Adm. Code 380.115
Facility Groups
Section 380.115 Facility Groups
a) Domestic
and industrial wastewater treatment works and pretreatment works shall be
grouped as follows:
1) All
publicly owned treatment works and domestic wastewater treatment works not
owned by an industry shall be grouped as follows:
A) Group
1 shall consist of all wastewater treatment works having a 1.0 MGD DAF or
greater, excluding lagoon systems and primary treatment systems.
B) Group
2 shall consist of activated sludge systems having a DAF of less than 1.0 MGD.
C) Group
3 shall consist of fixed film processes, recirculating sand filter systems and
Imhoff tank systems having a DAF of less than 1.0 MGD, and all primary
treatment systems.
D) Group
4 shall consist of lagoon treatment systems and septic tank systems permitted
by the Agency.
2) Industrial
wastewater treatment works and pretreatment works
A) Group
K shall consist of industrial wastewater treatment works, pretreatment works,
and domestic wastewater treatment works owned and operated by industries that
are not included in Group R.
B) Group
R shall consist of industrial wastewater treatment works, pretreatment works,
and domestic wastewater treatment works owned and operated by industries that
treat surface or groundwater for contamination resulting from gasoline, diesel
fuel, kerosene, jet fuel or heating oil.
b) When
a facility consists of more than one wastewater treatment process, the
classification of the facility will be based upon the more complex process.
c) Facilities
which cannot be clearly grouped according to subsection (a) will be considered
individually and designated within one of the above groups by the Agency. This
determination shall be based on the nature of the wastewater treatment works
and on the education and experience necessary to operate it.
d) The
owner of a facility designated within one of the groups pursuant to subsection
(c) may appeal the designation to the Illinois Pollution Control Board in
accordance with 35 Ill. Adm. Code 105.