Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 730 - UNDERGROUND INJECTION CONTROL OPERATING REQUIREMENTS
Subpart A - GENERAL
Section 730.104 - Criteria for Exempted Aquifers
Current through Register Vol. 48, No. 38, September 20, 2024
An aquifer or a portion of an aquifer that meets the criteria for an "underground source of drinking water" in Section 730.103 is an "exempted aquifer" for a Class I, Class III, or Class V injection well if the Board determines pursuant to 35 Ill. Adm. Code 704.123 that the aquifer meets the criteria of either subsections (a) and (b) or (a) and (c). For a Class VI injection well, the Board must determine that the well meets the criteria of subsection (d).
a) The aquifer does not currently serve as a source of drinking water.
b) The aquifer cannot now and will not in the future serve as a source of drinking water because one or more of the following is true of the aquifer:
c) The total dissolved solids content of the groundwater in the aquifer is more than 3,000 and less than 10,000 mg/l, and the aquifer is not reasonably expected to supply a public water system.
d) The areal extent of an aquifer exemption for a Class II enhanced oil recovery or enhanced gas recovery well is expanded for the exclusive purpose of Class VI injection for geologic sequestration pursuant to 35 Ill. Adm. Code 704.123(d) if the Agency determines that the aquifer meets the following criteria:
BOARD NOTE: Derived from 40 CFR 146.4 (2017).