Section 309.146  Authority to Establish Recording, Reporting, Monitoring, and Sampling Requirements

a)         The Agency must require every holder of an NPDES Permit, as a condition of the NPDES Permit issued to the holder, to:

1)         Establish, maintain, and retain records;

2)         Make reports adequate to determine the compliance or lack of compliance with all effluent limits and special conditions in the permit;

3)         Install, calibrate, use, and maintain monitoring equipment or methods (including, when appropriate, biological monitoring methods);

4)         Take samples of effluents (according to the methods, at the locations, at the intervals, and in the manner as may be prescribed); and

5)         Provide other information as may reasonably be required.

b)         The Agency may require every holder of an NPDES Permit for a publicly owned and publicly regulated treatment works, as a condition of the NPDES Permit, to require industrial users of such a treatment works to:

1)         Establish, maintain, and retain records;

2)         Make reports;

3)         Install, calibrate, use, and maintain monitoring equipment or methods (including, when appropriate, biological monitoring methods);

4)         Take samples of effluents (according to the methods, at the locations, at the intervals, and in the manner as may be prescribed); and

5)         Provide other information as may reasonably be required.

c)         All these requirements must be included as conditions of the NPDES Permit issued to the discharger and must be at least as stringent as those required by applicable federal regulations when these become effective.

d)         All permits must specify requirements for properly using, maintaining, and installing, when appropriate, monitoring equipment or methods (including biological monitoring methods, when appropriate), and required monitoring including type, interval, and frequency sufficient to yield data that are representative of the monitored activity including, when appropriate, continuous monitoring.

(Source:  Amended at 47 Ill. Reg. 5017, effective March 23, 2023)