1. Except as specified in section 15.40.330(3), all users operating under a wastewater discharge permit must, at a frequency determined by the director, submit no less than twice per year (July and January) reports indicating the nature, concentration of pollutants in the discharge which are limited by pretreatment standards or requirements, and the measured or estimated average and maximum daily flows for the reporting period. In cases where the pretreatment standard requires compliance with a BMP or pollution prevention alternative, the user must submit documentation required by the director or the pretreatment standard necessary to demonstrate the compliance status of the user.
2. The city may authorize a user subject to a categorical pretreatment standard to forgo sampling of a pollutant regulated by a categorical pretreatment standard if the 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 only present at background levels from intake water and without any increase in the pollutant due to activities of the user. This authorization is subject to the following conditions:
a. 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 pretreatment standard and otherwise includes no process wastewater.
b. The monitoring waiver is valid only for the duration of the effective period of the wastewater discharge permit, but in no case longer than five (5) years. The user must submit a new request for the waiver before the waiver can be granted for each subsequent wastewater discharge permit.
c. In making a demonstration that a pollutant is not present, the 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.
d. The request for a monitoring waiver must be signed by an authorized representative, and include the certification statement in section 15.40.180.
e. Non-detectable sample results may only be used as a demonstration that a pollutant is not present if an approved method with the lowest minimum detection level for that pollutant was used in the analysis.
f. Any grant of the monitoring waiver by the director must be included as a condition in the user’s wastewater discharge permit. The reasons supporting the waiver and any information submitted by the user in its request for a waiver must be maintained by the director for three (3) years after expiration of the waiver.
g. Upon approval of the of the monitoring waiver and revision of the user’s permit by the director, the user must certify on each report with the statement in section 15.40.180 that there has been no increase in the pollutant in its wastestream due to activities of the user.
h. In the event the 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 15.40.430, or other more frequent monitoring requirements imposed by the director; and notify the director.
i. This provision does not supersede certification processes and requirements established in categorical pretreatment standards, except as otherwise specified in the categorical pretreatment standard.
3. The city may reduce the requirement for periodic compliance reports to a required to report no less frequently than once per year, unless required more frequently in the pretreatment standard or by USEPA, State Water Resources Control Board, or Central Valley Regional Water Quality Control Board, where the user’s total categorical wastewater flow does not exceed any of the following:
a. 0.01 percent of the design dry weather hydraulic capacity of the water pollution control plant or five thousand (5,000) gallons per day, whichever is smaller, as measured by a continuous effluent flow monitoring device unless the user discharges in batches;
b. 0.01 percent of the design dry weather organic treatment capacity of the water pollution control plant; and
c. 0.01 percent of the maximum allowable headworks loading for any pollutant regulated by the applicable categorical pretreatment standard for which approved local limits were developed by the city in accordance with section 15.40.024.
Reduced reporting is not available to users that have in the last two (2) years been in significant noncompliance. In addition, reduced reporting is not available to a user with daily flow rates, production levels, or pollutant levels that vary so significantly that, in the opinion of the director, decreasing the reporting requirement for this user would result in data that are not representative of conditions occurring during the reporting period.
4. All periodic/self-monitoring compliance reports must be signed by an authorized representative and certified in accordance with section 15.40.180 of this chapter.
5. All wastewater samples must be representative of the user’s discharge. Wastewater monitoring and flow measurement facilities shall be properly operated, kept clean, and maintained in good working order at all times. The failure of a user to keep its monitoring facility in good working order shall not be grounds for the user to claim that sample results are unrepresentative of its discharge.
6. If a user subject to the reporting requirements in this section monitors any pollutant more frequently than required by the director, using the procedures prescribed in section 15.40.430, the results of this monitoring shall be included in the report.
(Ord. 2481 §1 (part))