Any users may be required to submit periodic compliance reports by permit or at the request of the superintendent.
A. All significant industrial users shall comply with all applicable requirements under 40 CFR 403.12 and submit to the city during the months of June and December, unless required on other dates or more frequency by the city, a report indicating the nature of the effluent over the previous reporting period. The frequency of monitoring shall be as prescribed within the industrial waste discharge permit. At a minimum, users shall sample their discharge at least twice per year. In cases where best management practice (BMP) or pollution prevention alternatives are required, the user must submit documentation required by the superintendent or the applicable pretreatment standard necessary to determine the compliance status of the user.
B. The report shall include a record of the concentration (and mass if specified in the wastewater discharge permit) of the pollutants listed in the wastewater discharge permit that were measured and record of all flow measurements (average and maximum) taken at the designated sampling locations and shall also include any additional information required by this chapter or wastewater discharge permit. Production data shall be reported if required by the wastewater discharge permit. Both daily maximum and average concentration (or mass, where required) shall be reported. If a user sampled and analyzed more frequently than what was required by the city or by this chapter, using methodologies in 40 CFR 136, it must submit all results of sampling and analysis of the discharge during the reporting period.
C. Any user subject to equivalent mass or concentration limits established by the city or by unit production limits specified in the applicable categorical pretreatment standards shall report production data as outlined in section 13.20.175 of this chapter.
D. If the city calculated limits to factor out dilution flows or nonregulated flows, the user will be responsible for providing flows from the regulated process flows, dilution flows, and nonregulated flows.
E. Flows shall be reported on the basis of actual measurement, provided, however, that the city may accept reports of average and maximum flows estimated by verifiable techniques if the city determines that an actual measurement is not feasible.
G. The city may require reporting by users that are not required to have an industrial wastewater discharge permit if information or data is needed to establish a sewer charge, determine the treatability of the effluent, or determine any other factor which is related to the operation and maintenance of the sewer system.
H. The city may require self-monitoring by the user or, if requested by the user, the city may agree to perform periodic compliance monitoring needed to prepare the periodic compliance report required under this section. If the city agrees to perform such periodic compliance monitoring, it may charge the user for such monitoring, based upon the costs incurred by the city for the sampling and analyses. Any such charges shall be added to the normal sewer charge and shall be payable as part of the sewer bills. The city is under no obligation to perform periodic compliance monitoring for a user.
I. The city may authorize an Industrial User subject to a categorical Pretreatment Standard to forego sampling of a pollutant regulated by a categorical Pretreatment Standard if the Industrial User has demonstrated through sampling and other technical factors that the pollutant is neither present nor expected to be present in the Discharge, or is present only at background levels from intake water and without any increase in the pollutant due to activities of the Industrial User. [See 40 CFR 403.12(e) (2)] This authorization is subject to the following conditions:
1. The waiver may be authorized where a pollutant is determined to be present solely due to sanitary wastewater discharged from the facility provided that the sanitary wastewater is not regulated by an applicable categorical Standard and otherwise includes no process wastewater.
2. The monitoring waiver is valid only for the duration of the effective period of the individual wastewater discharge permit, but in no case longer than 5 years. The User must submit a new request for the waiver before the waiver can be granted for each subsequent individual wastewater discharge permit.
3. In making a demonstration that a pollutant is not present, the Industrial User must provide data from at least one sampling of the facility's process wastewater prior to any treatment present at the facility that is representative of all wastewater from all processes.
4. The request for a monitoring waiver must be signed and include the certification statement in accordance with Section 13.20.125 of this chapter. (40 CFR 403.6(a) (2) (ii)).
5. Non-detectable sample results may be used only as a demonstration that a pollutant is not present if the EPA approved method from 40 CFR Part 136 with the lowest minimum detection level for that pollutant was used in the analysis.
6. Any grant of the monitoring waiver by the superintendent must be included as a condition in the User's permit. The reasons supporting the waiver and any information submitted by the User in its request for the waiver must be maintained by the superintendent for 5 years after expiration of the waiver.
7. Upon approval of the monitoring waiver and revision of the User's permit by the superintendent], the Industrial User must certify on each report with the statement in Section 13.20.125, that there has been no increase in the pollutant in its wastestream due to activities of the Industrial User.
8. In the event that a waived pollutant is found to be present or is expected to be present because of changes that occur in the User's operations, the User must immediately: Comply with the monitoring requirements of Section 13.20.180.A, or other more frequent monitoring requirements imposed by the superintendent, and notify the superintendent.
9. This provision does not supersede certification processes and requirements established in categorical Pretreatment Standards, except as otherwise specified in the categorical Pretreatment Standards. (Ord. 3125 § 5, 2023: Ord. 2837 § 1, 2008)