No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater which causes pass through or interference. These general prohibitions apply to all users of the POTW whether or not they are subject to categorical pretreatment standards or any other national, Federal, or local pretreatment standards or requirements. No user shall introduce or cause to be introduced into the District’s wastewater system the following pollutants, substances, or wastewater:
(a) 
Any liquids, solids or gases which by reason of their nature or quantity are, or may be, sufficient either alone or by interaction with other substances to cause fire or explosion or be injurious in any other way to the District wastewater system or personnel or to the operation of the District wastewater system. At no time shall two successive readings on an explosion hazard meter at the point of discharge into the system (or at any point in the system) be more than five percent nor any single reading over 10 percent of the lower explosive limit (LEL) of the meter. Prohibited materials include, but are not limited to, gasoline, kerosene, naphtha, benzene, toluene, xylene, ethers, alcohols, ketones, aldehydes, peroxides, chlorates, perchlorates, bromates, carbides, hydrides and sulfides. In no case shall a waste be discharged to the District facilities which has a closed cup flashpoint of less than 60 degrees Celsius (140 degrees Fahrenheit).
(b) 
Solid or viscous substances in amounts which may cause obstruction to the flow in a sewer or other interference with the operation of the treatment plant such as, but not limited to: grease, garbage with particles greater than one-half inch in any dimension, animal guts or tissues, paunch manure, bones, hair, hides or fleshings, entrails, whole blood, feathers, ashes, cinders, sand, spent lime, stone or marble dust, metal, glass, straw, shavings, grass clippings, rags, spent grains, spent hops, waste paper, wood, plastics, gas, tar, asphalt residues from refining or processing of fuel or lubrication oil, mud, or glass grindings or polishing wastes, petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in amounts that cause interference or pass through.
(c) 
Any wastewater having a pH less than 5.5, or greater than 12.5, or waste-water having any other corrosive property capable of causing damage or hazard to structures, equipment and/or personnel of the District.
(d) 
Any wastewater containing a toxic pollutant in sufficient quantity, either singly or by interaction with other pollutants, to injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, create a toxic effect in the receiving waters of the treatment plant, or to exceed the limitation set forth in a categorical standard. A toxic pollutant shall include, but not be limited to, any pollutant identified pursuant to Section 307(a) of the Act.
(e) 
Any noxious or malodorous liquids, gases or solids which either singly or by interaction with other pollutants are sufficient to create a public nuisance or hazard to life or are sufficient to prevent entry into the sewers for maintenance and repair.
(f) 
Any substance which may cause the treatment plant’s effluent or any other product of the treatment plant such as residues, sludges, or scums to be unsuitable for reclamation and reuse or to interfere with the reclamation process. In no case shall a substance discharged to the District wastewater system cause the treatment plant to be in noncompliance with sludge use or disposal criteria, guidelines or regulations developed under Section 405 of the Act, or any criteria, guidelines or regulations affecting sludge use or disposal developed pursuant to the Solid Waste Disposal Act, the Clean Air Act, the Toxic Substances Control Act, or State criteria applicable to the sludge management method being used.
(g) 
Any substance which will cause the District to violate its NPDES permit or the receiving water quality standards.
(h) 
Any wastewater with objectionable color not removed in the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions.
(i) 
Any wastewater having a temperature greater than 65 degrees Celsius (150 degrees Fahrenheit), or which will inhibit biological activity in the treatment plant resulting in interference, but in no case wastewater which causes the temperature at the introduction into the treatment plant to exceed 40 degrees Celsius (104 degrees Fahrenheit).
(j) 
Any pollutant, including oxygen-demanding pollutants (BOD, etc.) released at a flow rate and/or pollutant concentration which, either singly or by interaction with other pollutants, will cause interference to the operation of the treatment plant.
(k) 
Any wastewater containing any radioactive wastes or isotopes except in compliance with applicable State or Federal regulations.
(l) 
Any wastewater which causes a hazard to human life or creates a public nuisance.
(m) 
Any storm water, ground water, rain water, street drainage, subsurface drainage, yard drainage, swimming pool or spa diatomaceous earth filter backwash, unless a special discharge permit is issued by the District. The District may approve such discharge only when no reasonable alternative is available or such water is determined to constitute a pollution hazard if not discharged to a sewer.
(n) 
Any unpolluted water including, but not limited to, noncontact cooling water, process water or blow-down from cooling towers or evaporative coolers or any other unpolluted water unless a permit for such discharge has been obtained from the District prior to the discharge. The District may approve the discharge of such water only when no reasonable alternative method of disposal is available or such alternative in the determination of the District is unacceptable.
(o) 
Any septic tank waste unless a permit is issued by the District.
(p) 
Any holding tank waste unless a permit is issued by the District.
(q) 
Any waste defined as hazardous, by any definition set forth in Federal and/ or State statutes or regulations, unless such waste has been delisted or decertified by the appropriate Federal or State agency, and/or a variance has been granted by the appropriate Federal or State agency, including provisions for discharge to any part of the District wastewater system, and said variance provisions are approved by the District.
(r) 
Any substance, waste, wastewater or constituent thereof as may be specifically prohibited or prohibited by concentration levels as may be set forth in local limits adopted by resolution or ordinance of the District Board and a copy of said standards having been placed on file at the District office.
(s) 
Pollutants which result in the presence of toxic gases, vapors, or fumes with-in the POTW in a quantity that may cause acute worker health and safety problems.
(t) 
Trucked or hauled pollutants, except at discharge points designated by the District in accordance with Sections 6205 and 6216 of this Code.
(u) 
Medical wastes, except as specifically authorized by the District.
(Added, § 1, Ord. 88, 07-03-1990; amended, § 4, Ord. 100, 05-04-1993; § 1, Ord. 162, 07-01-2014; § 1, Ord. 178, 06-05-2018; § 1, Ord. 184, 04-07-2020)
Waste from garbage grinders shall not be discharged into the District wastewater system except:
(a) 
Wastes generated in preparation of food normally consumed on the premises; or
(b) 
Where the user has obtained a permit for that specific use from the District and agrees to undertake whatever self-monitoring is required to enable the District to equitably determine the user charges based on the waste constituents and characteristics.
Such grinders must shred the waste to a degree that all particles will be carried freely under normal flow conditions prevailing in the collection system. Garbage grinders shall not be used for grinding plastic, paper products, inert materials, or green waste.
(Added, § 1, Ord. 88, 07-03-1990; amended, § 1, Ord. 162, 07-01-2014; § 1, Ord. 178, 06-05-2018)
No person shall discharge any substances directly into a maintenance hole or other opening in the District’s sanitary sewer, including, but not limited to, any trucked or hauled pollutants except at discharge points designated by the District. Prior to discharge, the user must obtain a permit from the District by submitting a written application and payment of applicable charges and fees.
(Added, § 1, Ord. 88, 07-03-1990; amended, § 5, Ord. 100, 05-04-1993; § 1, Ord. 178, 06-05-2018; § 1, Ord. 204, 05-06-2025)
Where the District’s Treatment Plant achieves consistent removal of pollutants limited by pretreatment standards, the District may apply to the Regional Water Quality Control Board for modification of specific limits in the pretreatment standards. "Consistent Removal" shall mean reduction in the amount of a pollutant or alteration of the nature of the pollutant by the Treatment Plant to a less toxic or harmless state in the effluent which is achieved by the system in 95% of the samples taken when measured according to the procedures set forth in Section 403.7(c)(2) of Title 40 of the Code of Federal Regulations, Part 403 -- "General Pretreatment Regulations for Existing and New Sources of Pollution" promulgated pursuant to the Act. The District may then modify pollutant discharge limits in the federal pretreatment standards if the requirements contained in 40 CFR, Part 403, Section 403.7, are fulfilled and prior approval from the Regional Water Quality Control Board is obtained.
(Added, § 1, Ord. 88, 07-03-1990)
Users must comply with the categorical pretreatment standards found at 40 CFR Chapter I, Subchapter N, Parts 405 through 471. Upon the promulgation of a categorical standard for a particular industrial subcategory, the categorical standard, if more stringent than limitations imposed under these regulations for sources in that subcategory, shall immediately supersede the limitations imposed under these regulations. The District shall notify all affected users of the applicable reporting requirements under 40 CFR, Section 403.12.
(a) 
When wastewater subject to a categorical pretreatment standard is mixed with wastewater not regulated by the same standard, the District shall impose an alternate limit in accordance with 40 CFR 403.6(e).
(b) 
A categorical industrial user may obtain a net/gross adjustment to a categorical pretreatment standard in accordance with the following subsections of this Section:
(1) 
Categorical pretreatment standards may be adjusted to reflect the presence of pollutants in the industrial user’s intake water in accordance with this Section. Any industrial user wishing to obtain credit for intake pollutants must make application to the District. Upon request of the industrial user, the applicable standard will be calculated on a “net” basis (i.e., adjusted to reflect credit for pollutants in the intake water) if the requirements of subsection (b)(2) of this section are met.
(2) 
Criteria.
(i) 
Either (A) The applicable categorical pretreatment standards contained in 40 CFR Subchapter N specifically provide that they shall be applied on a net basis; or (B) the industrial user demonstrates that the control system it proposes or uses to meet applicable categorical pretreatment standards would, if properly installed and operated, meet the standards in the absence of pollutants in the intake waters.
(ii) 
Credit for generic pollutants such as biochemical oxygen demand (BOD), total suspended solids (TSS), and oil and grease should not be granted unless the industrial user demonstrates that the constituents of the generic measure in the user’s effluent are substantially similar to the constituents of the generic measure in the intake water or unless appropriate additional limits are placed on process water pollutants either at the outfall or elsewhere.
(iii) 
Credit shall be granted only to the extent necessary to meet the applicable categorical pretreatment standard(s), up to a maximum value equal to the influent value. Additional monitoring may be necessary to determine eligibility for credits and compliance with standard(s) adjusted under this Section.
(iv) 
Credit shall be granted only if the user demonstrates that the intake water is drawn from the same body of water as that into which the POTW discharges. The District may waive this requirement if it finds that no environmental degradation will result.
(c) 
When a categorical pretreatment standard is expressed only in terms of pollutant concentrations, an industrial user may request that the District convert the limits to equivalent mass limits. The determination to convert concentration limits to mass limits is within the discretion of the District. The District may establish equivalent mass limits only if the industrial user meets all the conditions set forth in sections below.
(1) 
To be eligible for equivalent mass limits, the industrial user must:
(i) 
Employ, or demonstrate that it will employ, water conservation methods and technologies that substantially reduce water use during the term of its individual waste-water discharge permit;
(ii) 
Currently use control and treatment technologies adequate to achieve compliance with the applicable categorical pretreatment standard, and not have used dilution as a substitute for treatment;
(iii) 
Provide sufficient information to establish the facility’s actual average daily flow rate for all waste streams, based on data from a continuous effluent flow monitoring device, as well as the facility’s long-term average production rate. Both the actual average daily flow rate and the long-term average production rate must be representative of current operating conditions;
(iv) 
Not have daily flow rates, production levels, or pollutant levels that vary so significantly that equivalent mass limits are not appropriate to control the discharge; and
(v) 
Have consistently complied with all applicable categorical pretreatment standards during the period prior to the industrial user’s request for equivalent mass limits.
(2) 
An industrial user subject to equivalent mass limits must:
(i) 
Maintain and effectively operate control and treatment technologies adequate to achieve compliance with the equivalent mass limits;
(ii) 
Continue to record the facility’s flow rates through the use of a continuous effluent flow monitoring device;
(iii) 
Continue to record the facility’s production rates and notify the District whenever production rates are expected to vary by more than 20 percent from its baseline production rates determined in subsection (c)(1)(iii) of this section. Upon notification of a revised production rate, the District will reassess the equivalent mass limit and revise the limit as necessary to reflect changed conditions at the facility; and
(iv) 
Continue to employ the same or comparable water conservation methods and technologies as those implemented pursuant to subsection (c)(1)(i) of this section so long as it discharges under an equivalent mass limit.
(3) 
When developing equivalent mass limits, the General Manager:
(i) 
Will calculate the equivalent mass limit by multiplying the actual average daily flow rate of the regulated process(es) of the industrial user by the concentration-based daily maximum and monthly average standard for the applicable categorical pretreatment standard and the appropriate unit conversion factor;
(ii) 
Upon notification of a revised production rate, will reassess the equivalent mass limit and recalculate the limit as necessary to reflect changed conditions at the facility; and
(iii) 
May retain the same equivalent mass limit in subsequent individual wastewater discharger permit terms if the industrial user’s actual average daily flow rate was reduced solely as a result of the implementation of water conservation methods and technologies, and the actual average daily flow rates used in the original calculation of the equivalent mass limit were not based on the use of dilution as a substitute for treatment pursuant to Section 6209 of this Code. The industrial user must also be in compliance with Section 6209 of this Code regarding the prohibition of bypassing.
(d) 
The District may convert the mass limits of the categorical pretreatment standards of 40 CFR Parts 414, 419, and 455 to concentration limits for purposes of calculating limitations applicable to individual industrial users. The conversion is at the discretion of the General Manager.
(e) 
Once included in its permit, the industrial user must comply with the equivalent limitations developed in this Section in lieu of the promulgated categorical standards from which the equivalent limitations were derived.
(f) 
Many categorical pretreatment standards specify one limit for calculating maximum daily discharge limitations and a second limit for calculating maximum monthly average, or four-day average, limitations. Where such standards are being applied, the same production or flow figure shall be used in calculating both the average and the maximum equivalent limitation.
(g) 
Any industrial user operating under a permit incorporating equivalent mass or concentration limits calculated from a production-based standard shall notify the District within two business days after the user has a reasonable basis to know that the production level will significantly change within the next calendar month. Any user not notifying the District of such anticipated change will be required to meet the mass or concentration limits in its permit that were based on the original estimate of the long-term average production rate.
(Added, § 1, Ord. 88, 07-03-1990; amended, § 1, Ord. 178, 06-05-2018)
A user proposing to discharge holding tank waste into the District wastewater system must secure a permit. Unless otherwise allowed by the District under the terms and conditions of the permit, a separate permit must be secured for each separate discharge. This permit will state the specific location of discharge, the time of day the discharge is to occur, the volume of the discharge and the wastewater constituents and characteristics. If a permit is granted for discharge of such waste into a community sewer, the user shall pay the applicable charges and fees and shall meet such other conditions as required by the District. The District may allow, at its sole discretion, the discharge of domestic wastes from mobile home holding tanks without a permit provided such discharges are approved by the District prior to discharge and the discharge is made into an agency approved facility designed to receive such wastes.
(Added, § 1, Ord. 88, 07-03-1990; amended, § 6, Ord. 100, 05-04-1993; § 1, Ord. 178, 06-05-2018)
(a) 
No person shall discharge wastewater containing in excess of the following:
Pollutant
Limit
EPA Test Method*
Arsenic
0.8 mg/l
206.2
Cadmium
0.2 mg/l
213.1
Copper
1.9 mg/l
220.1
Cyanide
1.0 mg/l
335.2/3
Lead
1.0 mg/l
239.1
Mercury
0.01 mg/l
245.1
Nickel
1.0 mg/l
249.1
Selenium
1.0 mg/l
 
Silver
0.8 mg/l
272.1
Total chromium
2.0 mg/l
218.1
Zinc
3.0 mg/l
289.1
Phenolic compounds
70 mg/l
420.1
Oil and grease of mineral origin
100 mg/l
413.1
Oil and grease of animal or vegetable origin
300 mg/l
413.1
pH
> 5.5 and < 12.5
150.1
Temperature
150 deg. F
170.1
*
Or equivalent method must meet detection limits of EPA method.
(b) 
The above limits are “daily maximum” allowable discharge limits; however, the District may at its discretion utilize results of a grab sample or composite sample to determine if any of the above result limitations are met.
(c) 
National categorical standards, found in 40 CFR Chapter I, Subchapter N, Parts 405 through 471, are hereby incorporated into these regulations. Effluent limitations promulgated by the Federal Act shall apply in any instance where they are more stringent than those in these regulations.
(d) 
Additional limits specific to the discharge of ground water or surface water. No user shall discharge ground water or surface water in excess of:
Test
EPA Method
Limit
Total petroleum hydrocarbons (TPH)
EPA 8015
15 mg/l
B.T.E.X. group
EPA 8020
 
Benzene
 
0.005 mg/l*
Toluene
 
1.0 mg/l*
Ethylbenzene
 
0.7 mg/l*
Xylene
 
10 mg/l*
*
U.S. EPA drinking water maximum contaminant levels (MCLs).
(e) 
Wastewater strength limits for constituents not listed above may be established in a wastewater discharge permit based upon available treatment technology, existing wastewater conditions in the District’s facilities or other factors as determined by the District.
(f) 
The District may, in cases where pollutants contributed by user(s) result in interference or pass through, and such violation is likely to recur, develop and enforce specific effluent limits for industrial user(s), and all other users, as appropriate, which, together with appropriate changes in the District’s treatment plant facilities or operation, are necessary to ensure renewed and continued compliance with the District’s NPDES permit or sludge use or disposal practices.
(g) 
The District may develop best management practices (BMPs) to implement Section 6200 of this Code. Such BMPs shall be considered local limits and pretreatment standards for the purposes of Section 307(d) of the Act.
(Added, § 1, Ord. 88, 07-03-1990; amended, § 7, Ord. 100, 05-04-1993; § 1, Ord. 178, 06-05-2018; § 1, Ord. 184, 04-07-2020)
State requirements and limitations on discharges shall apply in any case where they are more stringent than federal requirements and limitations or those in these regulations.
(Added, § 1, Ord. 88, 07-03-1990)
The District reserves the right to establish, by ordinance or in wastewater discharge permits, more stringent limitations or requirements on discharges to the District wastewater system consistent with the purpose of this Code.
(Added, § 1, Ord. 88, 07-03-1990; amended, § 1, Ord. 178, 06-05-2018)
No user shall ever increase the use of process water, or in any way attempt to dilute a discharge, as a partial or complete substitute for adequate treatment to achieve compliance with a discharge limitation unless expressly authorized by an applicable pretreatment standard or requirement. The General Manager may impose mass limitations on users who are using dilution to meet applicable pretreatment standards or requirements, or in other cases when the imposition of mass limitations is appropriate. User shall not divert any regulated waste stream from the pretreatment system.
(Added, § 1, Ord. 88, 07-03-1990; amended, § 8, Ord. 100, 05-04-1993; § 1, Ord. 178, 06-05-2018)
Sample collection and analysis shall be performed in accordance with procedures established by the EPA and contained in 40 CFR Part 136, as amended. Where 40 CFR Part 136 does not contain sampling or analytical techniques for the pollutant in question, or where the Administrator determines that the Part 136 sampling and analytical techniques are inappropriate for the pollutant in question, sampling and analysis shall be performed by using validated analytical methods or any other applicable sampling and analytical procedures, including those suggested by the District or other persons, and approved by the District. Samples collected to satisfy reporting requirements must be based on data obtained through appropriate sampling and analysis performed during the period covered by the report, based on data that is representative of conditions occurring during the reporting period.
(a) 
Except as indicated in subsections (b) and (c) of this section, the user must collect wastewater samples using 24-hour flow-proportional composite sampling techniques, unless time-proportional composite sampling or grab sampling is authorized by the General Manager. Where time-proportional composite sampling or grab sampling is authorized by the District, 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 District, as appropriate. In addition, grab samples may be required to show compliance with instantaneous limits.
(b) 
Samples for oil and grease, temperature, pH, cyanide, total phenols, sulfides, and volatile organic compounds must be obtained using grab collection techniques.
(c) 
For sampling required in support of baseline monitoring and 90-day compliance reports required in Sections 6407 and 6409 of this Code (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 General Manager may authorize a lower minimum. For the reports required by Section 6408 of this Code (40 CFR 403.12(e) and (h)), the industrial user is required to collect the number of grab samples necessary to assess and assure compliance with applicable pretreatment standards and requirements.
(Added, § 1, Ord. 88, 07-03-1990; amended, § 1, Ord. 178, 06-05-2018)
(a) 
Each user shall provide protection from accidental discharge of prohibited materials or other substances regulated by these regulations. Facilities to prevent accidental discharge of prohibited materials shall be provided and maintained at the owner or user’s own cost and expense. Detailed plans showing facilities and operating procedures to provide this protection shall be submitted to the District for review and shall be approved by the District before construction of the facility. Review and approval of such plans and operating procedures shall not relieve the user from the responsibility to modify the user’s facility as necessary to meet the requirements of this Code.
(b) 
The General Manager shall evaluate whether each significant industrial user needs a slug discharge control plan or other action to control slug discharges. The General Manager 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 General Manager may develop such a plan for any user. A 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 General Manager of any accidental or slug discharge, as required by subsection (c) of this section; 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.
(c) 
In the case of any 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 treatment plant, it is the responsibility of the user to immediately telephone and notify the General Manager of the incident. The notification shall include location of discharge, type of waste, concentration and volume, and corrective actions.
(d) 
Written Notice. Within five days following a discharge as described in subsection (c) of this section, the user shall submit to the General Manager 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 which may be incurred as a result of damage to the District facilities, fish kills, or any other damage to person or property; nor shall such notification relieve the user of any fines, civil penalties, or other liability which may be imposed by these regulations or other applicable law.
(e) 
Notice to Personnel. A notice shall be permanently posted on the user’s bulletin board or other prominent place advising user’s personnel who to call in the event of a discharge described in subsection (c) of this section. Employers shall insure that all personnel who may cause or suffer such a dangerous discharge to occur are advised of the emergency notification procedure.
(f) 
Significant industrial users are required to notify the General Manager immediately of any changes at their facility affecting the potential for a slug discharge.
(Added, § 1, Ord. 88, 07-03-1990; amended, § 9, Ord. 100, 05-04-1993; § 1, Ord. 162, 07-01-2014; § 1, Ord. 178, 06-05-2018)
The user shall notify the General Manager of any significant changes (permanent or temporary) to the premises, operations, quality or volume of wastewater, water usage, process, installation or removal of tanks or equipment which might alter the nature, quality, or volume of its wastewater at least 60 days before the change, and obtain District approval prior to implementation.
(a) 
The General Manager may require the user to submit such information as may be deemed necessary to evaluate the changed condition, including the submission of a wastewater discharge permit application under Section 6402 of this Code.
(b) 
The General Manager may issue a wastewater discharge permit under Section 6405 of this Code or modify an existing wastewater discharge permit under Section 6403 of this Code in response to changed conditions or anticipated changed conditions.
(Added, § 1, Ord. 178, 06-05-2018)
(a) 
The user shall notify the District, the EPA Regional Waste Management Division Director and the California Department of Health Services, in writing, of any intentional or accidental discharge of a substance which, if otherwise disposed of, would be a hazardous waste under 40 CFR Part 261. Notification must be made within 180 days after the discharge. Such notification must include 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 user discharges more than 100 kilograms of such waste per calendar month to the POTW, the notification also shall contain the following information to the extent such information is known and readily available to the user: an identification of the hazardous constituents contained in the wastes, an estimation of the mass and concentration of such constituents in the waste stream discharged during that calendar month, and an estimation of the mass of constituents in the waste stream expected to be discharged during the following 12 months.
(b) 
The notification requirement does not apply to pollutants already reported in periodic self-monitoring reports.
(c) 
Dischargers are exempt from the requirements of subsection (a) 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 nonacute 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 user discharges more than such quantities of any hazardous waste do not require additional notification.
(d) 
In the case of any notification made under this Section, the user 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.
(Added, § 10, Ord. 100, 05-04-1993; amended, § 1, Ord. 178, 06-05-2018)
[1]
Previously 6212.
Special agreements and arrangements between the District and any other person or agencies may be established when, in the opinion of the District, unusual or extraordinary circumstances compel special terms and conditions. Under no circumstances, however, will any special agreement or arrangement be established which contravenes any Federal pretreatment regulation, categorical pretreatment standard, or any other provision of Federal law, or which compromises the Federal pretreatment goals to prevent pass through, interference or impairment of sludge use or disposal. The dischargers must apply for and receive approval for a wastewater discharge permit prior to discharge. Best available technology must be used, and the District may impose any condition deemed necessary including, but not limited to, additional sampling, monitoring and reporting.
(Added, § 11, Ord. 100, 05-04-1993; amended, § 1, Ord. 178, 06-05-2018)
[1]
Previously 6213.
(a) 
All dental dischargers shall comply with 40 CFR Part 441 requirements including best management practices, removal of dental amalgam solids and reporting, and with the following best management practices:
(1) 
Vacuum pumps must be equipped with filters. Clean or replace central vacuum filters regularly. During restoration procedures, maximize use of the high speed suction (vacuum) and rubber dams; thereby, more amalgam waste is captured.
(2) 
Do not use bulk liquid mercury. Use premeasured amalgam capsules of various sizes, to provide better mixing and reduce waste.
(3) 
Dental unit water lines, chair-side traps, and vacuum lines that discharge amalgam process wastewater to the District wastewater system must not be cleaned with oxidizing or acidic cleaners, including but not limited to bleach, chlorine, iodine and peroxide that have a pH lower than six or greater than eight.
(4) 
Waste amalgam including, but not limited to, dental amalgam from chair-side traps, screens, vacuum pump filters, dental tools, cuspidors, or collection devices, must not be discharged to the District’s wastewater system.
(5) 
Change traps frequently. Do not place amalgam waste with regular solid waste or medical waste. Contact amalgam: collect used capsules, chair-side screens and traps, vacuum system screens and filters in a large airtight plastic container for recycling. Noncontact amalgam: collect noncontact amalgam scrap separately in small airtight plastic containers from each operatory for recycling. Mixed scrap amalgam: disinfect extracted teeth with amalgam fillings and collect them in airtight mixed amalgam scrap-recycling containers. Do not use disinfectant solutions with oxidizers, such as bleach, to disinfect the amalgam. Use transparent bottle traps under sinks and cuspidor drains of each operatory. Collect waste from traps and place them with other mixed scrap amalgam waste. Do not add water or waste fixer to any of these containers. Keep them dry at all times.
(6) 
Have a licensed contractor pick up amalgam waste for recycling.
(7) 
Train personnel annually in proper handling and disposal of amalgam materials. Also train new personnel when hired. Maintain training log for all personnel for three years and have records readily available for inspection.
(b) 
Dental dischargers that must comply with 40 CFR Part 441 must remove dental amalgam solids from all amalgam process wastewater by one of the methods listed in 40 CFR Part 441, which includes an ISO 11143 certified amalgam separator device.
(c) 
Amalgam separators shall be installed, operated and maintained in accordance with manufacturer recommendations. Installation, certification and maintenance records shall be available for immediate inspection upon request by the District during normal business hours.
(Added, § 1, Ord. 151, 02-02-2010; amended, § 1, Ord. 162, 07-01-2014; § 1, Ord. 178, 06-05-2018)
[1]
Previously 6214.
Grease, oil, and sand interceptors shall be required when, in the opinion of the District, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts, or any flammable wastes, sand, and other harmful ingredients. All interceptors shall be of a type and capacity approved by the District, and shall be located as to be readily and easily accessible for cleaning and inspection.
Grease and oil interceptors shall be constructed of impervious materials capable of withstanding abrupt and extreme changes in temperature. They shall be of substantial construction, watertight, and equipped with easily removable covers which when bolted in place shall be gastight and watertight.
(§ 504, Ord. 12, 03-20-1950; amended, § 1, Ord. 138, 07-01-2005; § 1, Ord. 174, 11-07-2017; § 1, Ord. 178, 06-05-2018; § 1, Ord. 184, 04-07-2020)
[1]
Previously 6215.
Where installed, all grease, oil, and sand interceptors shall be maintained by the owner, at the owner’s expense, in efficient operational condition by periodic removal of the full content of the interceptor which includes wastewater, accumulated fats, oils and grease, floating materials, sludge and solids. All interceptors shall be maintained on a minimum of a six-month frequency. At the District’s request, owners with interceptors shall be required to submit record data and information verifying acceptable maintenance operations.
(§ 505, Ord. 12, 03-20-1950; amended, § 1, Ord. 138, 07-01-2005; § 1, Ord. 174, 11-07-2017; § 1, Ord. 178, 06-05-2018; § 1, Ord. 184, 04-07-2020)
[1]
Previously 6216.
The admission into the public sewers of any waters or wastes having (a) a five-day biochemical oxygen demand greater than 300 parts per million by weight, or (b) containing more than 350 parts per million by weight of suspended solids, or (c) containing any quantity of substances having the characteristics described in Section 6200 of this Code, or (d) having an average daily flow greater than two percent of the average daily wastewater flow of the Castro Valley Sanitary District, shall not be permitted.
(§ 506, Ord. 12, 03-20-1950; amended, § 1, Ord. 74, 11-13-1984; § 3, Ord. 76, 02-12-1985; § 1, Ord. 162, 07-01-2014; § 1, Ord. 174, 11-07-2017; § 1, Ord. 178, 06-05-2018)
[1]
Previously 6217.
(a) 
Septic tank waste may be introduced into the District’s wastewater system only at locations designated by the General Manager, and at such times as are established by the General Manager. Such waste shall not violate Section 6200 of this Code or any other requirements established by the District. The General Manager shall require septic tank waste haulers to obtain a wastewater discharge permit.
(b) 
The General Manager may require haulers of industrial waste to obtain a wastewater discharge permit. The General Manager may require generators of hauled industrial waste to obtain a wastewater discharge permit. The General Manager also may prohibit the disposal of hauled industrial waste. The discharge of hauled industrial waste is subject to all other requirements of this Code.
(c) 
Industrial waste haulers may discharge loads only at locations designated by the General Manager. No load may be discharged without prior consent of the General Manager. The General Manager may collect samples of each hauled load to ensure compliance with applicable standards. The General Manager may require the industrial waste hauler to provide a waste analysis of any load prior to discharge.
(d) 
Industrial waste haulers must provide a waste tracking form for every load. This form shall include, at a minimum, the name and address of the industrial waste hauler, permit number, truck identification, names and addresses of sources of waste, and volume and characteristics of waste. The form shall identify the type of industry, known or suspected waste constituents, and whether any wastes are RCRA hazardous wastes.
(Added, § 1, Ord. 178, 06-05-2018)