13.08.270 Analysis requirements (subregional system).
A. Wastewater Survey. The Director of Utilities may periodically require users to submit information or update information on the nature and characteristics of its wastewater. Failure to submit this survey information within 30 days of the request shall be considered a violation of this title.
B. Sampling. The Director of Utilities may periodically require any user to sample their wastewater discharge or submit to the wastewater sampling by the Director of Utilities in establishing the appropriate class of the user and/or to evaluate compliance with the standards and requirements of this title.
1. Sample Collection. Except as indicated in subsection (B)(2) of this section, the user shall collect wastewater samples using flow proportional composite collection techniques. In the event flow proportional sampling is infeasible, the Director of Utilities may authorize the use of time proportional sampling or grab sampling over the production day 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 daily maximum discharge limits.
2. Samples should be taken for Federal 40 CFR limits, for categorical industries immediately downstream from pretreatment facilities if such exist, or immediately downstream from the regulated process if no pretreatment exists. If other wastewaters are mixed with the regulated wastewater prior to pretreatment, the user shall measure the flows and concentrations necessary to allow use of the combined wastestream formula in order to evaluate compliance with the pretreatment standards.
C. Contents of Reports on Sampling and Analysis.
1. Reports shall contain results of sampling and analysis, identifying the nature and concentration (or mass, where required by the City) of regulated pollutants in the discharge from each regulated process. Both daily maximum and average concentration (or mass, where required) shall be reported.
2. Reports, signed and certified by a duly authorized representative of the industrial user, as set forth in 40 CFR Part 403.6(a)(2)(ii) and 40 CFR Part 403.12(l) or as amended, shall certify that such sampling and analysis are representative of normal work cycles and expected pollutant discharges to the POTW and shall contain the following information:
a. The date, exact place, method, and time of sampling and the names of the person or persons taking the samples;
b. Sample preservation used;
c. The dates analyses were performed;
d. Chain of custody of the sample;
e. Who performed the analyses;
f. The analytical techniques/methods used; and
g. The results of such analyses.
D. Analytical Requirements. All pollutant analyses, including sampling techniques, to be submitted as part of a wastewater discharge permit application or required report will be performed in accordance with the techniques prescribed in 40 CFR Part 136, 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, sampling and analyses must be performed in accordance with procedures approved by EPA. All analyses shall be performed by a laboratory(ies) certified by the State for the specified pollutants and matrix to be analyzed. (Ord. 1078, 2015)