35 Ill. Adm. Code 306.102
Systems Reliability
Section 306
Section 306.102 Systems
Reliability
a) Malfunctions. All treatment works and associated facilities must
be constructed and operated to minimize violations of applicable standards
during contingencies including flooding, adverse weather, power failure,
equipment failure, or maintenance, through measures including multiple units,
holding tanks, duplicate power sources, or other appropriate measures.
b) Spills. All reasonable measures, including where appropriate
catchment areas, relief vessels, or entrapment dikes, must be taken to prevent
any spillage of contaminants from causing water pollution.