35 Ill. Adm. Code 845.620
Hydrogeologic Site Characterization
Section 845.620 Hydrogeologic
Site Characterization
a) The
owner or operator of the CCR surface impoundment must design and implement a
hydrogeologic site characterization.
b) The
hydrogeologic site characterization must include, but is not limited to, the
following:
1) Geologic well
logs/boring logs;
2) Climatic
aspects of the site, including seasonal and temporal fluctuations in
groundwater flow;
3) Identification of
nearby surface water bodies and drinking water intakes;
4) Identification
of nearby pumping wells and associated uses of the groundwater;
5) Identification
of nearby dedicated nature preserves;
6) Geologic setting;
7) Structural
characteristics;
8) Geologic
cross-sections;
9) Soil characteristics;
10) Identification
of confining layers;
11) Identification
of potential migration pathways;
12) Groundwater
quality data;
13) Vertical
and horizontal extent of the geologic layers to a minimum depth of 100 feet
below land surface, including lithology and stratigraphy;
14) A
map displaying any known underground mines beneath a CCR surface impoundment;
15) Chemical
and physical properties of the geologic layers to a minimum depth of 100 feet
below land surface;
16) Hydraulic
characteristics of the geologic layers identified as migration pathways and
geologic layers that limit migration, including:
A) Water table depth;
B) Hydraulic
conductivities;
C) Effective and total
porosities;
D) Direction and velocity
of groundwater flow; and
E) Map of the potentiometric
surface;
17) Groundwater
classification under 35 Ill. Adm. Code 620; and
18) Any
other information requested by the Agency that is relevant to the hydrogeologic
site characterization.