(A) All significant industrial users with IDEM discharge permits must sample in accordance with that permit.
(B) For other users of the wastewater system that are required or requested by the Utility Director to provide samples the user must collect wastewater samples using flow proportional composite collection techniques, except as indicated in (C) of this section. In the event flow proportional sampling is infeasible, the Utility Director may authorize the use of time proportional sampling or a minimum of four grab samples where the user demonstrates that this will provide a representative sample of the effluent being discharged. In addition, grab samples may be required to show compliance with instantaneous discharge limits.
(C) Samples for oil and grease, temperature, pH, cyanide, phenols, sulfides, and volatile organic compounds must be obtained using grab collection techniques.
(Ord. 22-08-20, passed 8-11-20)