(A) Except as indicated in division (B) below, the industrial user must collect wastewater samples using 24 hour timed composite collection techniques. In the event timed sampling is infeasible, the Director may authorize the use of 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. Grab sample collection procedures must conform to 40 C.F.R. Part 403.12(g)(4). All wastewater samples must be representative of the IU's discharge per 40 C.F.R. Part 403.12(g)(3).
(B) Samples for oil and grease, temperature, pH, cyanide, phenols, toxicity, sulfides and volatile organic chemicals must be obtained using grab collection techniques.
(1960 Code, § 38-14-53) (Ord. 5677, passed 12-16-1996; Am. Ord. 8173-2018, passed 2-21-2018)