All pollutant analyses, including sampling techniques, required under this chapter or by any industrial wastewater discharge permit, shall be performed in accordance with the techniques prescribed in 40 CFR Part 136 and amendments thereto unless otherwise specified in an applicable categorical pretreatment standard. If 40 CFR Part 136 does not contain sampling or analytical techniques for the pollutant in question, or where the EPA determines that the Part 136 sampling and analytical techniques are inappropriate for the pollutant in question, sampling and analyses shall be performed by using validated analytical methods of any other applicable sampling and analytical procedures, including procedures suggested by the City or other parties approved by EPA.
(A) Charges to users. When surveillance sampling is conducted by the City, a split shall be made available for analysis by user upon request. Analyses made by the City at the request of the user shall be charged to the user according to the sewage works' standard work order billing procedure.
(B) Charges to governmental agencies. Analyses performed by the Water Pollution Control Plant Laboratory for any governmental agency, or political subdivision of a city, county or state shall be billed to such agency or subdivision for direct labor and expenses according to the sewage works' standard work order billing procedure. Analyses performed for other agencies shall not have priority over the regular Water Pollution Control Plant analyses unless in the judgment of the Superintendent the urgency of the analyses warrants such priority.
(C) Charges of outside services. Analyses performed by the Water Pollution Control Plan Laboratory for any person shall be billed at the rate established by the Water Pollution Control Plant Laboratory for such analyses.
(D) Charges collected. All waste analysis charges collected under divisions (A) through (B) above shall be recorded as credits to the operating costs of the Water Pollution Control Plant and a quarterly accounting thereof shall be forwarded to the Superintendent. All such charges are to be used to defray the operation and maintenance expenses incurred by the Water Pollution Control Plant in performing said analyses.
(E) Compliance reports must be based upon sampling and analysis performed during the period covered by the report, which data are representative of conditions occurring during the reporting period. Grab samples must be used for pH, cyanide, total phenols, oil and grease, sulfide, and total volatile organic compounds. Frequency of monitoring will be required as necessary to assess and assure compliance with applicable pretreatment standards and requirements. For all other pollutants, 24-hour composite samples must be obtained through flow-proportionate composite sampling techniques, unless time-proportional composite sampling or grab sampling is authorized by the control authority. Where time proportional composite sampling or grab sampling is authorized by the control authority, the samples must be representative of the discharge and the decision to allow the alternative sampling must be documented in the industrial user file for the facility. Using protocols (including appropriate preservation) specified in 40 CFR Part 136 and appropriate United States Environmental Protection Agency guidance, multiple grab samples collected during a 24-hour period may be composited prior to the analysis as follows: for cyanide, total aphenols, and sulfides the samples may be composited in the laboratory or in the field; for volatile organics and oil and grease the samples may be composited in the laboratory. Composite samples for other parameters unaffected by the compositing procedures as documented in approved United States Environmental Protection Agency methodologies may be authorized by the control authority, as appropriate.
(F) For sampling required in support of baseline monitoring and 90-day compliance reports, a minimum of four (4) grab samples must be used for pH, cyanide, total phenols, oil and grease, sulfide, and volatile organic compounds for facilities for which historical sampling data do not exist; for facilities which historical sampling data are available, the control authority may authorize a lower minimum. For periodic reports for users subject to categorical standards and reporting requirements for users not subject to categorical pretreatment standards, the control authority shall require the number of grab samples necessary to assess and assure compliance by users with applicable pretreatment standards and requirements.
(Ord. G-5-18, passed 3-13-18)