(A) Except as indicated in division (B) below, the user must collect wastewater samples using flow proportional composite collection techniques. In the event flow proportional sampling is infeasible, the Wastewater Utility Manager may authorize the use of time proportional sampling consisting of a minimum of four grab samples if the user demonstrates, to the satisfaction of the Wastewater Utility Manager, that time proportional sampling will provide a representative sample of the effluent being discharged. In addition, grab samples may be required to show compliance with instantaneous discharge limits.
(B) Samples for COD, oil and grease (O&G), temperature, pH, cyanide, phenols, sulfides, and volatile organic compounds must be obtained using grab sample collection techniques.
(Ord. 2008-38, passed 12-10-2008; Ord. 2019-25, passed on 5-13-2020)