35 Ill. Adm. Code 620.230
Class III: Special Resource Groundwater
Section 620
Section 620.230Â Class III: Â Special
Resource Groundwater
Except as provided in Section
620.250, Special Resource Groundwater is as described in subsection (a) or (b):
a)Â Â Â Â Â Â Â Â Groundwater that is determined by the Board, under the
procedures specified in Section 620.260, to be:
1)Â Â Â Â Â Â Â Â Demonstrably unique (e.g., irreplaceable sources of
groundwater) and suitable for application of a groundwater quality standard
more stringent than the otherwise applicable groundwater quality standard
specified in Subpart D; or
2)Â Â Â Â Â Â Â Â Vital for a particularly sensitive ecological system.
b)Â Â Â Â Â Â Â Â Groundwater that contributes to a dedicated nature preserve
that is listed by the Agency as specified below:
1)Â Â Â Â Â Â Â Â A written request to list a dedicated nature preserve under
this subsection must contain the following information:
A)Â Â Â Â Â Â Â A general description of the site and the surrounding land use;
B)Â Â Â Â Â Â Â A topographic map or other map of suitable scale denoting the location
of the dedicated nature preserve;
C)Â Â Â Â Â Â Â A general description of the existing groundwater quality at
and surrounding the dedicated nature preserve;
D)Â Â Â Â Â Â Â A general geologic profile of the dedicated nature preserve
based upon the most reasonably available information, including geologic maps
and subsurface groundwater flow directions; and
E)Â Â Â Â Â Â Â A description of the interrelationship between groundwater and
the nature of the site.
2)Â Â Â Â Â Â Â Â Upon confirmation by the Agency of the technical adequacy of a
written request, the Agency must publish the proposed listing of the dedicated
nature preserve in the Environmental Register for a 45-day public comment
period. Within 60 days after the close of the public comment period, the Agency
must either publish a final listing of the dedicated nature preserve in the
Environmental Register or provide a written response to the requestor
specifying the reasons for not listing the dedicated nature preserve.
3)Â Â Â Â Â Â Â Â At least once annually, the Agency must publish in the
Environmental Register a complete listing of all dedicated nature preserves
listed under this subsection.
4)Â Â Â Â Â Â Â Â For this subsection "dedicated nature preserve"
means a nature preserve that is dedicated under the Illinois Natural Areas
Preservation Act [525 ILCS 30].