Ill. Admin. Code tit. 35, § 845.620 – Hydrogeologic Site Characterization | Midpage
§ 845.620
Ill. Admin. Code tit. 35, § 845.620
Hydrogeologic Site Characterization
AUTHORITY: Implementing Sections 12, 22, and 22.59 of the Environmental Protection Act [415 ILCS 5/12, 22, and 22.59] and authorized by Sections 22.59, 27, and 28 of the Environmental Protection Act [415 ILCS 5/22.59, 27, and 28].POLLUTION CONTROL BOARD
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.