Sample collection.
Oklahoma City Municipal Code § 47-341
in effect§ 47-341. - Sample collection.
(a) Except in Subsection (b) below, where flow is sufficient, wastewater compliance samples shall be a composite sample of at least four grab samples of equal proportion taken at equal time intervals during a users normal production day. The Director may use production records and flow data to establish a user's normal production day, and may require grab samples to be taken at greater intervals to prepare a composite sample. An instantaneous grab sample shall be used to determine compliance on batch or intermittent discharge. The 30-Day average limit shall apply to batch or intermittent discharge in determining user compliance.
(b) Samples for oil and grease, temperature, pH, cyanide, phenols, toxicity, sulfides and volatile organic chemicals must be obtained using grab collection techniques.
(Code 1980, § 41-6.11; Ord. No. 19830, § 1, 9-29-92; Ord. No. 20916, § 10, 10-21-97; Ord. No. 24155, § 4, 10-19-10)
Source: City of Oklahoma City, Municipal Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/ok/oklahoma_city/codes/code_of_ordinances?nodeId=OKMUCO2020_CH47SESEDI_ARTVIIINHADI_DIV5RERE_S47-341SACOFetched: 10/28/2026