A. 
When the Director determines it is necessary to modify or eliminate wastes or portions of wastes in order to comply with this Chapter, the user shall provide, operate, and maintain continuously in satisfactory and effective operation at user's expense such pretreatment or processing facilities as may be necessary to ensure compliance with this Chapter.
B. 
Detailed plans, specifications, and operating procedures, and any other pertinent information relating to the proposed facilities shall be submitted to the Director for approval. No premises and no new facilities may be connected to the public sewer until such approval is obtained in writing. The review and approval by the Director of such plans, specifications, and procedures does not constitute an opinion or evaluation of the adequacy of such plans, specifications, and procedures to perform in a manner that guarantees compliance with applicable regulations, standards, and limitations, nor does such approval relieve the user from the responsibility of modifying the facility in the future, as necessary to ensure compliance with this Chapter.
C. 
When pretreatment facilities are provided, whether or not required, they shall be maintained continuously in satisfactory and effective operation by the user.
D. 
Wastes recovered from pretreatment devices and not permitted to be discharged into a City sewer shall be transported to a State-approved disposal site in accordance with applicable regulations, standards, and limitations.
(Prior code § 3366; Ord. 1740(25), 12/16/2025)
The Director may require any user to provide, operate, and maintain a flow equalization facility, in accordance with Section 13.16.350, in order to ensure equalization of discharge if, in the opinion of the Director, such action is necessary to protect the wastewater system.
(Prior code § 3367; Ord. 1740(25), 12/16/2025)
A. 
Traps/interceptors to capture grease, oil, lint, hair, and/or sand shall be required when, as determined by the Director, they are necessary for the proper handling of wastewater containing such pollutants and for protection of the wastewater system from liquid wastes containing excessive amounts of grease, flammable wastes, sand, or other harmful pollutants. Such traps/interceptors may be required for discharges from service stations, food service establishments, bakeries, automobile repair garages, wash racks, laundries, barbershops, beauty shops/salons, and dry-cleaning establishments and other facilities as deemed necessary by the Director.
B. 
The Director shall notify any user upon determination that a trap/interceptor is necessary, and the user shall provide, operate, and maintain the trap/interceptor in accordance with Section 13.16.350. All traps/interceptors shall be of a type and capacity approved by the City. Users installing a new grease interceptor shall abide by any additional conditions required by the Director and obtain any permits required by the Building Code.
C. 
Installation of new traps/interceptors shall be conducted in accordance with manufacturer's specifications and in accordance with the Uniform Plumbing Code, as specified in Sections 15.03.010 and 15.04.050 of this Code. Trap/interceptor sizing is based on fixture capacity or drainage fixture units in the facility and needs to be determined by a certified plumber or licensed engineer according to the Uniform Plumbing Code. Grease and oil or sand traps/interceptors shall be constructed of impervious materials capable of withstanding abrupt and extreme changes of temperature. Traps/interceptors shall be of substantial construction, water-tight, and equipped with easily removable covers which, when in place, shall be gastight and water-tight. All traps/interceptors shall be located as to be readily and easily accessible for cleaning and inspection, and shall be maintained continuously in satisfactory and effective operation (as determined by the Director) by the user at the user's expense. Trap/interceptor cleaning and maintenance records are pretreatment program records and must be maintained per recordkeeping requirements in this Chapter.
D. 
Users with the potential to discharge flammable substances may be required to install and maintain an approved combustible gas detection meter.
(Prior code § 3368; Ord. 1619(15) § 2; Ord. 1740(25), 12/16/2025)
A. 
Accidental discharge. All users shall provide protection from accidental discharge of prohibited materials or other substances regulated by this Chapter.
B. 
Upon notification from the Director, a user shall provide, operate, and maintain facilities designed to preclude the accidental discharge of prohibited materials or other substances regulated by this Chapter in accordance with Section 13.16.350 of this Chapter, and applicable provisions of CCR Title 22.
C. 
In the case of any upset or discharge, including, but not limited to, accidental discharges, discharges of a nonroutine, episodic nature, a noncustomary batch discharge, a slug discharge or slug load, that might cause potential problems for the POTW, the user shall immediately, no later than within 24 hours of any occurrence, telephone and notify the Director of the incident. This notification shall include the location of the discharge, type of waste, concentration and volume, if known, and corrective actions taken by the user.
1. 
Written notice. Within five days following such upset or discharge, the user shall, unless waived by the Director, submit a detailed written report describing the characteristics of the wastewater discharged; the cause(s) of the upset or discharge; the period of noncompliance, including exact dates and times; and the measures to be taken by the user to prevent similar future occurrences. Such notification shall not relieve the user of any expense, loss, damage, or other liability which might be incurred as a result of damage to the POTW, natural resources, or any other damage to person or property; nor shall such notification relieve the user of any fines, penalties, or other liability which may be imposed pursuant to this Chapter.
2. 
Notice to Employees. A notice shall be permanently posted on the user's bulletin board or other prominent place advising employees who to call in the event of a discharge described in Subsection C, above. Employers shall ensure that all employees who could cause such a discharge to occur are advised of the emergency notification procedure.
D. 
The Director shall evaluate whether each SIU needs an accidental discharge/slug discharge control plan or other action to control slug discharges. The Director may require any user to develop, submit for approval, and implement such a plan or take such other action that may be necessary to control slug discharges. Alternatively, the Director may develop such a plan for any user. An accidental discharge/slug discharge control plan shall address, at a minimum, the following:
1. 
Description of discharge practices, including nonroutine batch discharges;
2. 
Description of stored chemicals;
3. 
Procedures for immediately notifying the Director of any accidental or slug discharge, as required by Subsection C above; and
4. 
Procedures to prevent adverse impact from any accidental or slug discharge. Such procedures include, but are not limited to, inspection and maintenance of storage areas, handling and transfer of materials, loading and unloading operations, control of plant site runoff, worker training, building of containment structures or equipment, measures for containing toxic organic pollutants, including solvents, and/or measures and equipment for emergency response.
E. 
Significant Industrial Users are required to notify the Director immediately of any changes at their facilities affecting the potential for a slug discharge.
F. 
All users, including those not required to obtain a wastewater discharge permit, shall provide appropriate reports to the Director as the Director may require.
G. 
Violations and repeat sampling. If sampling performed by a user indicates a violation, the user must notify the Director within 24 hours of becoming aware of the violation. The user shall also repeat the sampling and analysis and submit the results of the repeat analysis to the Director within 30 days after becoming aware of the violation. Resampling by the user is not required if the City performs sampling at the user's facility at least once a month, or if the City performs sampling at the user's facility between the time when the initial sampling was conducted and the time when the user or the City receives the results of the sampling, or if the City has performed the sampling and analysis in lieu of the user.
H. 
Changed Conditions. Each user must notify the Director at least 10 business days in advance of any significant change to the user's operations or system which might significantly alter the nature, quality, or volume of its wastewater. For the purposes of this Chapter, a "significant change" is any change which results in a long-term average flow rate change of 20% or more, or results in a long-term average change in concentration of any pollutant(s) of 20% or more, or would cause the user to violate a local limit or other pretreatment standard. The Director may require the user to submit such information as may be deemed necessary to evaluate the changed condition, including the submission of an updated wastewater discharge permit application. The Director may issue an individual wastewater discharge permit or modify an existing wastewater discharge permit in response to changed conditions or anticipated changed conditions.
I. 
Bypass. A user may allow any bypass to occur which does not cause pretreatment standards or requirements to be violated, but only if it also is for essential maintenance to assure efficient operation. Otherwise, a bypass is prohibited, and the Director may take enforcement action against a user for a bypass as necessary.
1. 
If a user knows in advance of the need for a bypass, it shall submit prior notice to the Director, at least 10 days before the date of the bypass, if possible.
2. 
A user shall give oral notice to the Director of an unanticipated bypass that exceeds applicable pretreatment standards within 24 hours from the time it becomes aware of the bypass. A written submission shall also be provided within five days of the time the user becomes aware of the bypass. The written submission shall contain a description of the bypass and its cause; the duration of the bypass, including exact dates and times, and, if the bypass has not been corrected, the anticipated time it is expected to continue; and steps taken or planned to reduce, eliminate, and prevent reoccurrence of the bypass. The Director may waive the written report on a case-by-case basis if the oral report has been received within 24 hours.
3. 
The Director may waive enforcement action against a user for a bypass provided:
a. 
Bypass was unavoidable to prevent loss of life, personal injury, or severe property damage;
b. 
There were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities, retention of untreated wastes, or maintenance during normal periods of equipment downtime. This condition is not satisfied if adequate back-up equipment should have been installed in the exercise of reasonable engineering judgment to prevent a bypass which occurred during normal periods of equipment downtime or preventive maintenance; and
c. 
The user submitted notices as required under Subsection I.1 and 2 of this Section.
d. 
The Director may approve an anticipated bypass, after considering its adverse effects, if the Director determines that it will meet the three conditions listed in Subsection I. 3.a through c of this Section.
(Prior code § 3369; Ord. 1740(25), 12/16/2025)
A. 
The Director may require any user to provide, operate, and maintain at user's expense flow monitoring, process monitoring, and/or sampling facilities. Upon notification from the Director, the user shall provide, operate and maintain such facilities in accordance with Section 13.16.350 of this Chapter.
B. 
Any sample taken from a sampling facility installed in accordance with this Section is presumed to be discharging to the City sewer.
C. 
Monitoring or metering facilities may be required to have a security closure that can be locked with a City-provided hasp lock during sampling and monitoring.
(Prior code § 3370; Ord. 1740(25), 12/16/2025)