Earlier editions: 2026-09
Oxnard Municipal Code Div. 6 Reporting Requirements
Oxnard Municipal Code · 2026-10 edition · updated 2026-10-04 · Oxnard
Cite as: Oxnard Municipal Code Division 6 · Text as of 2026-10-04
SEC. 19-70. MONITORING FACILITIES.¶
(A) All users required to obtain an IWD permit shall furnish, install and properly maintain a monitoring facility for wastewater sampling. This monitoring facility shall be of a design or configuration approved by the city manager, who may require flow measurement equipment, automatic flow proportional sampling equipment and automatic wastewater analysis and data recording equipment.
(B) Each user, as a part of its application for obtaining an IWD permit, shall propose a suitable location and design for the wastewater monitoring facility. Upon approval of the monitoring facility by the city manager, the user shall perform wastewater monitoring at this facility. The monitoring facility shall be located so as to be safe and accessible to city employees, and shall be constructed in accordance with the city's requirements, and all applicable local building codes and other local construction requirements. The user's proposal for a wastewater monitoring facility shall comply with the city's design requirements and shall be reviewed and approved by the city manager. Plans for all wastewater monitoring facilities, including flow measurement and sampling systems, determined by the city manager to require engineering design, shall be prepared and signed by a civil, chemical or mechanical engineer registered in the State or a registered engineer of other suitable discipline as determined by the city manager.
(C) The user's wastewater sampling analysis and flow measurement procedures, equipment, and results shall be subject to inspection by the city manager at any time. Wastewater monitoring and flow measurement facilities shall be properly operated, kept clean, and maintained in good working order at all times by the user.
(D) Failure of a user to keep approved wastewater monitoring facilities clean and in good working order shall not be grounds for the user to claim that any sample results are unrepresentative of the user's wastewater. Flow measurement systems shall be regularly maintained and calibrated in accordance with guidelines established by the city manager.
(`64 Code, Sec. 25-48) (Ord. No. 2494)
SEC. 19-71. BASELINE MONITORING REPORTS.¶
(A) Within either 180 days after the effective date of a categorical pretreatment standard by an agency with the appropriate jurisdiction and authority to adopt categorical pretreatment standards, or within 180 days after the final administrative decision on a category determination under 40 CFR Part 403.6(a)(4), whichever is later, existing categorical users currently discharging to or scheduled to discharge to the system shall submit to the city manager a report which contains the information listed in subsection (C) below.
(B) At least 90 days prior to commencement of discharge, new sources, and sources that become categorical users subsequent to the promulgation of applicable categorical standard, shall submit to the city manager a report which contains the information listed in subsection (C) below. A new source shall report the method of pretreatment it intends to use to meet applicable categorical standards. A new source shall also give estimates of anticipated flow and quantity of pollutants discharged.
(C) Users described above shall submit the information set forth below, and all such submittals must be signed and certified in accordance with section 19-55 of this chapter:
(1) The name and address of the facility, including the name of the operator and owner;
(2) A list of any environmental control permits held by or for the facility;
(3) A brief description of the nature, average rate of production, and standard industrial classifications of the operation carried out by the user including a schematic process diagram that indicates points of discharge to the system from the regulated processes;
(4) Information showing the measured average daily and maximum daily flow, in gallons per day, to the system from regulated process streams and other streams, as necessary, to allow use of the combined waste stream formula set out in 40 CFR Part 403.6(e);
(5) (a) The categorical pretreatment standards applicable to each regulated process;
(b) The results of sampling and analysis identifying the nature and concentration, and/or mass, where required by the standard or the city manager, of regulated pollutants in the discharge from each regulated process including instantaneous, daily maximum, and long-term average concentrations, or mass, where required;
(c) The sample shall be representative of daily operations and shall be analyzed in accordance with procedures set out in section 19-79 of this article. Sampling shall be performed in accordance with procedures set out in section 19-80 of this article.
(6) A statement, reviewed by the user's authorized representative and certified by a qualified professional, indicating whether pretreatment standards are being met on a consistent basis, and, if not, whether additional operation and maintenance (O&M) and/or additional pretreatment is required to meet the pretreatment standards and requirements;
(7) If additional pretreatment and/or O&M will be required to meet the pretreatment standards, the user shall provide the city manager with the shortest schedule by which the user shall complete such additional pretreatment and/or O&M. The completion date shall not be later than the compliance date established for the applicable pretreatment standard. A compliance schedule pursuant to this section must meet the requirements set out in section 19-72 of this article;
(8) Any other relevant information requested by the city manager; and
(9) Signed and certified baseline monitoring reports in accordance with section 19-71 of this article.
(`64 Code, Sec. 25-49) (Ord. No. 2494, 2761, 2875)
SEC. 19-72. COMPLIANCE SCHEDULES.¶
The following conditions shall apply to the schedule required by section 19-71(C)(7) of this article:
(A) The schedule shall contain progress increments in the form of dates for the commencement and completion of major events leading to the construction and operation of additional pretreatment required for the user to meet the applicable pretreatment standards such events include, but are not limited to, hiring an engineer, completing preliminary and final plans, executing contracts for major components, commencing and completing construction, and beginning and conducting routine operation;
(B) No increment referred to above shall exceed nine months;
(C) The user shall submit a progress report to the city manager no later than 14 days following each date in the schedule and the final date of compliance including, at a minimum, whether user complied with the increment of progress, the reason for any delay, and, if appropriate, the steps being taken by the user to return to the established schedule; and
(D) In no event shall more than nine months elapse between such progress reports to the city manager.
(`64 Code, Sec. 25-50) (Ord. No. 2494)
SEC. 19-73. REPORT ON COMPLIANCE WITH CATEGORICAL PRETREATMENT STANDARD DEADLINE.¶
Within 90 days following the date for final compliance with applicable categorical pretreatment standards, or in the case of a new source following commencement of the introduction of wastewater into the system, any user subject to such pretreatment standards and requirements shall submit to the city manager a report containing the information described in section 19-71(C)(4) through (6). For users subject to equivalent mass or concentration limits established in accordance with the procedures in 40 CFR Part 403.6(c), this report shall contain a reasonable measure of the user's long-term production rate. For all other users subject to categorical pretreatment standards expressed in terms of allowable pollutant discharge per unit of production (or other measure of operation), this report shall include the user's actual production during the appropriate sampling period. All compliance reports must be signed and certified in accordance with section 19-55 of this article.
(`64 Code, Sec. 25-51) (Ord. No. 2494)
SEC. 19-74. PERIODIC COMPLIANCE REPORTS.¶
(A) All significant industrial users shall, at a frequency determined by the city manager, but in no case less than twice per year (in June and December), submit a report indicating the nature and concentration of pollutants in the discharge that are limited by pretreatment standards 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 city manager of the pretreatment standard necessary to determine the compliance status of the user. All periodic compliance reports must be signed and certified in accordance with section 19-55 of this article.
(B) 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.
(C) If a user, subject to the reporting requirement in this section, monitors any pollutant more frequently than required by the city manager, using the procedures prescribed in section 19-79 of this article, the results of this monitoring shall be included in the report sent to the city manager.
(`64 Code, Sec. 25-52) (Ord. No. 2494, 2761)
SEC. 19-75. REPORT OF CHANGED CONDITIONS.¶
(A) Each user shall notify the city manager of any planned significant changes to the user's operations or system which might alter the nature, quality or volume of its wastewater at least 30 days before the change.
(B) The city manager may require the user to submit such information as may be deemed necessary to evaluate the changed condition, including the submission of an IWD permit application under sections or 19-54 or 19-55 of this article, if necessary.
(C) The city manager may issue an IWD permit under section 19-56 of this article, or modify an existing IWD permit under section 19-60 of this article in response to changed conditions or anticipated changed conditions.
(D) For purposes of this section, significant changes include, but are not limited to, flow increases of 25% or greater, and the discharge of any previously unreported pollutants.
(E) (1) An IU shall notify the POTW, the EPA Regional Waste Management Division Director, and State hazardous waste authorities in writing of any discharge into the POTW of a substance, which, if otherwise disposed of, would be a hazardous waste under 40 CFR Part 261. Such notification must inlcude the name of the hazardous waste as set forth in 40 CFR Part 261, the EPA hazardous waste number, and the type of discharge (continuous, batch, or other). If the IU discharges more than 100 kilograms of such waste per calendar month to the POTW, the notification shall also contain the following information to the extent such information is known and readily available to the IU: an identification of the hazardous constituents contained in the wastes, an estimation of the mass and concentration of such constituents in wastestream discharged during that calendar month, and an estimation of the mass of constituents in the wastestream expected to be discharged during the following 12 months. All notifications must take place within 180 days after the effective date of this rule. Industrial users who commence discharging after the effective date of this rule shall provide the notification no later than 180 days after the discharge of the listed or characteristic hazardous waste. Any notification under this subsection need by submitted only once for each hazardous waste discharged. However, notifications of changed discharges must be submitted under 40 CFR 403.12(j). The notification requirement in this section does not apply to pollutants already reported under the self-monitoring requirements of 40 CFR 403.12(b), (d), and (e).
(2) Dischargers are exempt from the requirements of subsection (E)(1) of this section during a calendar month in which they discharge no more than 15 kilograms of hazardous wastes, unless the wastes are acute hazardous wastes as specified in 40 CFR 261.30(d) and 261.33(e). Discharge of more than 15 kilograms of non-acute hazardous wastes in a calendar month, or of any quantity of acute hazardous wastes as specified in 40 CFR 261.30(d) and 261.33(e), requires a one-time notification. Subsequent months during which the IU discharges more than such quantities of any hazardous waste do not require additional notification.
(3) In the case of any new regulations under section 3001 of RCRA identifying additional characteristics of hazardous waste or listing any additional substance as a hazardous waste, the IU must notify the POTW, the EPA Regional Waste Management Waste Division Director, and State hazardous waste authorities of the discharge of such substance within 90 days of the effective date of such regulations.
(4) In the case of any notification made under subsection (E) of this section, the IU shall certify that it has a program in place to reduce the volume and toxicity of hazardous wastes generated to the degree it has determined to be economically practical.
(`64 Code, Sec. 25-53) (Ord. No. 2494, 2875)
SEC. 19-76. REPORTS OF POTENTIAL PROBLEMS.¶
(A) In the case of any discharge, including, but not limited to, accidental discharges, discharges of a non-routine, episodic nature, a non-customary batch discharge, or a slug load, which may cause potential problems for the system, the user shall immediately telephone and notify the city manager 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.
(B) Within five days following such discharge, the user shall, unless this requirement is waived by the city manager, submit a detailed written report describing the cause of the discharge 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 that may be incurred as a result of damage to the system, natural resources, or any other damage to person or property, nor shall such notification relieve the user of any fines, penalties, or other liability that may be imposed by this article or any other applicable provision of federal, State or local law.
(C) 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 (A) above. Employers shall ensure that all employees, who may cause such a discharge to occur, are advised of the emergency notification procedure.
(D) Significant industrial users are required to notify the city manager immediately of any changes at its facility affecting the potential for a slug discharge.
(`64 Code, Sec. 25-54) (Ord. No. 2494, 2761)
SEC. 19-77. REPORTS FROM UNPERMITTED USERS.¶
All users not required to obtain an IWD permit shall provide appropriate reports as the city manager may require.
(`64 Code, Sec. 25-55) (Ord. No. 2494)
SEC. 19-78. NOTICE OF VIOLATION; REPEAT SAMPLING AND REPORTING.¶
If a user's sampling indicates a violation, the user shall notify the city manager 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 city manager within 30 days after becoming aware of the violation. The user is not required to resample if the city manager conducts monitoring at the user's facility at least once a month, or if the city manager samples between the user's initial sampling and when the user receives the results of this sampling. If the city performed the sampling and analysis in lieu of the industrial user, the city will perform the repeat sampling and analysis unless the city notifies the industrial user of the violation and requires the user to perform the repeat sampling and analysis.
(`64 Code, Sec. 25-56) (Ord. No. 2494, 2761)
SEC. 19-79. ANALYTICAL REQUIREMENTS.¶
All pollutant analyses, including sampling techniques, to be submitted as part of an IWD permit application or report shall 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 shall be performed in accordance with procedures approved by the EPA.
(`64 Code, Sec. 25-57) (Ord. No. 2494)
SEC. 19-80. SAMPLE COLLECTION.¶
(A) Except as indicated in subsection (B) below, the user shall collect wastewater samples using flow proportional composite collection techniques. In the event flow proportional sampling is infeasible, the city manager may authorize the use of time proportional sampling. Where time-proportional composite sampling or grab sampling is authorized by the city manager, the samples must be representative of the discharge. Using protocols (including appropriate preservation) specified in 40 CFR Part 136 and appropriate EPA guidance, multiple grab samples collected during a 24-hour period may be composited prior to the analysis as follows: for cyanide, total phenols, 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 EPA methodologies may be authorized by the city manager, as appropriate. In addition, grab samples may be required to show compliance with instantaneous discharge limits.
(B) Samples for oil and grease, temperature, pH, cyanide, phenols, sulfides, and volatile organic compounds shall be obtained using grab collection techniques.
(C) For sampling required in support of baseline monitoring and 90-day compliance reports required in section 19-71 and 19-73 (40 CFR 403.12(b) and (d)), a minimum of four 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 for which historical sampling data are available, the city manager may authorize a lower minimum. For the reports required by section 19-74 (40 CFR 403.12(e) and 403.12(h)), the industrial user is required to collect the number of grab samples necessary to assess and assure compliance by with applicable pretreatment standards and requirements.
(D) Samples should be taken 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 should measure the flows and concentrations necessary to allow use of the combined wastestream formula of 40 CFR 403.6(e) in order to evaluate compliance with the pretreatment standards. Where an alternate concentration or mass limit has been calculated in accordance with 40 CFR 403.6(e) this adjusted limit along with supporting data shall be submitted to the city.
(`64 Code, Sec. 25-58) (Ord. No. 2494, 2761, 2875)
SEC. 19-81. MONITORING CHARGES.¶
The city manager may recover the city's expenses incurred in collecting and analyzing samples of the user's discharge and may collect such charges in the manner specified in division 11 of this article.
(`64 Code, Sec. 25-59) (Ord. No. 2494)
SEC. 19-82. TIMING.¶
Written reports, applications, notices, and all mailings shall be deemed to have been submitted on the date postmarked. For reports that are not mailed, postage prepaid, into a mail facility serviced by the United States mail, the date of receipt of the report shall govern.
(`64 Code, Sec. 25-60) (Ord. No. 2494)
SEC. 19-83. RECORD KEEPING.¶
Users subject to the reporting requirements of this article shall retain, and make available for inspection and copying, all records of information obtained pursuant to any monitoring activities required by this article and any additional records of information obtained pursuant to monitoring activities undertaken by the user independent of such requirements, and documentation associated with BMPs established under section 19-26(C). Records shall include the date, exact place, method, and time of sampling and the name of the person taking the samples, the dates analyses were performed, who performed the analyses, the analytical techniques or methods used, and the results of such analyses. These records shall remain available for a period of at least three years. This period shall be automatically extended for the duration of any litigation concerning the user or the city or where the user has been specifically notified of a longer retention period by the city manager.
(`64 Code, Sec. 25-61) (Ord. No. 2494, 2761)
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