§616.445. Inspection Requirements

a)         During construction and installation, liners must be inspected for uniformity, damage, and imperfections (e.g., holes, cracks, thin spots, or foreign materials).  Immediately after construction or installation:

 

1)         Synthetic liners and covers must be inspected to ensure tight seams and joints and the absence of tears, punctures, and blisters; and

 

2)         Soil-based and admixed liners and covers must be inspected for imperfections including lenses, cracks, channels, root holes, or other structural non-uniformities that may cause an increase in the permeability of that liner or cover.

 

b)         During operation, a surface impoundment must be inspected weekly and after storms to detect evidence of any of the following:

 

1)         Deterioration, malfunctions, or improper operation of overtopping control systems;

 

2)         Sudden drops in the level of the impoundment's contents;

 

3)         Severe erosion or other signs of deterioration in dikes or other containment devices; or

 

4)         A leaking dike.

 

(Source:  Amended at 47 Ill. Reg. 7631, effective May 16, 2023)