Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 392 - GUIDELINES FOR NOTIFICATION OF RESTRICTED STATUS OR CRITICAL REVIEW PURSUANT TO 35 ILL. ADM. CODE 306.105
Subpart B - DETERMINATION OF RESTRICTED STATUS
Section 392.203 - Criteria for Placing Sewers and Lift Stations on Restricted Status
Universal Citation: 35 IL Admin Code ยง 392.203
Current through Register Vol. 48, No. 38, September 20, 2024
a) The Agency may place sanitary sewers and lift stations on Restricted Status in order to prevent overflows as expressly prohibited 35 Ill. Adm. Code 306.103(b). Restricted Status may be imposed upon the confirmation of overflows in the form of basement backups, overflows of sanitary sewer manholes, or sanitary sewer overflow devices.
b) All combined and sanitary sewers and lift stations are subject to Restricted Status when they become hydraulically overloaded, meaning unable to accommodate the following flows:
1) Combined sewers and lift
stations serving combined sewers must be able to handle 350 percent of the
average daily flow (based on best available information) before
overflowing.
2) Interceptors
serving both combined sewers and sanitary sewers must be able to accommodate
250 percent of the average daily dry weather flow (based on best available
information) from the sanitary sewers tributary thereto and 350 percent of the
average daily dry weather flow from the combined sewers tributary thereto
before overflowing.
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