Ill. Admin. Code tit. 35 § 401.103
The purpose of Subtitle D is to prevent pollution of waters of Illinois caused by failure to plan proper environmental safeguards for the location, preparation, operation and abandonment of mining activities, mining and mine refuse operations. Subtitle D establishes a permit system to control contaminating point and non-point source discharges, visible and hidden, continuous and fluctuating, that are potentially present in mining activities, mining and mine refuse operations. To ensure that these activities meet environmental standards, Subtitle D establishes water quality and effluent standards to limit discharges from point sources and to protect waters for beneficial uses. Subtitle D establishes procedural safeguards to ensure the protection of waters. It is the purpose of Subtitle D to meet the requirements of Section 402 of the Federal Water Pollution Control Act of 1972 (FWPCA).
Ill. Admin. Code tit. 35, § 401.103