A. 
It is the objective of the City to regulate and control the quantity and quality of discharges into the sewer system so that they will not adversely affect the various collection, transmission, treatment or discharge requirements, or environmental conditions, and will permit the City to treat wastewater pursuant to the requirements of the State or Federal government, and their designated agencies.
B. 
Adverse affects can occur to:
1. 
The health and safety of personnel employed in the operation and maintenance of the sewage collection, transmission, and treatment facilities;
2. 
The operational cost, maintenance and durability of collection, transmission and treatment facilities;
3. 
The quality of the receiving waters as measured by the requirements established by the State and Federal government through their properly designated and responsible agencies;
4. 
The air quality as measured by the requirements established by the State and Federal government through their properly designated and responsible agencies.
C. 
It is the general intent of the City to provide for collection and treatment of domestic sanitary sewage and commercial and industrial wastewaters in such a way as to avoid adverse effects on the system and to provide equitable charges for the costs incurred.
(Ord. 322 § 1, 1976)
The ordinance codified in this chapter is adopted under authorization of Government Code Sections 54344 et seq., and Health and Safety Code Sections 5471 et seq.
(Ord. 322 § 1, 1976)
Permits to discharge into the sewer system of the City anything but domestic sewage will only be granted in accordance with, and in consideration of, the special conditions of each case, and shall be subject to reasonable rules, regulations and requirements to prevent excessive alkalinity, acidity, organic, inorganic, odor producing, toxic or other deleterious substances.
(Ord. 322 § 1, 1976)
A. 
Except as otherwise provided in this chapter, no person shall discharge or cause to be discharged any of the water or wastewaters set forth in CMC § 13.08.305 through § 13.08.380 into public sewers.
B. 
The list of prohibited wastes set forth in this chapter may be amended by resolution of the Council, and shall be deemed automatically amended to conform with Federal and State mandates as the same may from time to time be changed.
(Ord. 322 § 1, 1976; Ord. 435 § 4, 1988)
A. 
No person shall discharge or cause to be discharged any rainwater, stormwater, groundwater, street drainage, subsurface drainage, yard drainage, water from yard fountains, geothermal well water, ponds or lawn sprays or any other uncontaminated water into any sewer system facility which directly or indirectly discharges to facilities owned by the City.
B. 
The provisions of this section shall apply only to sanitary sewers.
(Ord. 322 § 1, 1976)
Solids or viscous substances in quantities or of such size capable of causing obstruction with the proper operation of the sewer system works such as, but not limited to, ashes, cinders, sand, rocks, gravel, mud, straw, shavings, sawdust, oil, grease, metal, glass, rags, hair, hides, wood, feathers, tar, plastics, wood, unground garbage, paper dishes, cups, containers, etc., either whole or ground by a garbage grinder are prohibited.
(Ord. 322 § 1, 1976)
A. 
Any garbage excepting properly shredded garbage from dwellings or restaurants engaged in the preparation of foods and beverages for consumption are prohibited.
B. 
Properly shredded garbage shall contain no more than five percent (dry weight basis) of material and be able to pass through a three-eighths-inch screen.
(Ord. 322 § 1, 1976)
Any mineral oils, grease or products of a petroleum origin or any excessive concentrations of nonbiodegradable oil, petroleum oil or refined petroleum products, or cutting oils, commonly called soluble oil, which form persistent water emulsions, are prohibited.
(Ord. 322 § 1, 1976)
A. 
Suspended solids discharged in industrial process wastewater shall have a dimension no larger than that of one-quarter-inch mesh.
B. 
In addition, any industrial or commercial process water or wastes containing suspended solids of such character and quantity that unusual attention or expense is required to handle such materials in the collection system and/or at the sewage treatment plant are prohibited.
(Ord. 322 § 1, 1976; Ord. 462, 1991)
Any waters or wastes containing toxic or poisonous substances in sufficient quantity to injure or interfere with or create any hazard in the sewage treatment processes, effluent quality, or receiving water quality requirements to humans, animals, or plant life are prohibited.
A. 
The maximum concentration of any toxic substances allowable by any discharger for admission into the sewer system shall be as set forth by the State Water Resources Control Board, to be adopted by the Council by resolution from time to time.
B. 
The maximum allowable concentration of toxic or potentially toxic materials not otherwise specified by the State will be determined on an individual basis. No industrial wastes shall be discharged which have a lethal toxicity as determined by a 96-hour static bioassay with stickleback of less than a 25 percent concentration of wastewater.
(Ord. 322 § 1, 1976; Ord. 435 § 5, 1988)
A. 
Radioactive wastes of any kind shall not be discharged, except where:
1. 
The person is authorized to use radioactive materials by the State Department of Public Health, Atomic Energy Commission, or other governmental agency empowered to regulate the use of radioactive materials;
2. 
The waste is discharged in strict conformity with current State Department of Public Health and Atomic Energy Commission recommendations for safe disposal of radioactive wastes;
3. 
The person discharging the radioactive waste assumes full responsibility for any injury to personnel or damage to the sewer system that may result from such discharge;
4. 
Radioactivity of the treated wastewater prior to disposal does not exceed limits established by the designated agencies of the State; and
5. 
Residual radioactivity is within limits permitted by State or local regulation in final disposal.
B. 
Any person discharging a radioactive waste into the sewer system in accordance with the provisions of subsection (A) of this section shall apply for a permit to discharge such wastes, and submit a periodic report of discharge occurrences and quantities. In the event of an accidental spill of any radioactive material into the sewer system, the person responsible shall immediately notify the Director of Public Works.
(Ord. 322 § 1, 1976)
Any water or wastes containing substances which are not amenable to treatment or which cause the treatment plant effluent to fail to meet any discharge requirements established by the State or the United States federal government are prohibited.
(Ord. 322 § 1, 1976)
Materials are prohibited which exert or cause:
A. 
Unusual concentrations of inert suspended solids;
B. 
Excessive discoloration;
C. 
Unusual BOD, chemical oxygen demand, or chlorine requirements in such quantities as to constitute a significant load on the sewage treatment plant; or
D. 
Unusual volume of flow or slugs; as used in this section, "slugs" shall mean any discharge of water, sewage or waste which in concentration of any given constituent or in quantity of flow exceeds for any period of duration longer than 15 minutes more than five times the average 24-hour concentration or flow during normal dry weather operation.
(Ord. 322 § 1, 1976)
A. 
Any substances in any commercial or industrial waste discharge which may result in operational costs and maintenance of sewage collection and treatment facilities in excess of that required for normal domestic sanitary sewage of waste concentration as listed in Section 704.A of the Federal Water Pollution Control Act Amendments of 1972 or with any of the prohibited waste characteristics as listed in Section 705 of the Federal Water Pollution Control Act Amendment of 1972, and/or having an average daily flow greater than one-half percent of the average daily dry weather flow of the City shall be subject to the review and approval of the City.
B. 
Any or all of the following restrictions may be required by the City for acceptance of the wastewater into the sewer system:
1. 
Pursuant to Section 307(b) of the Federal Water Pollution Control Act Amendments of 1972, as presently existing or subsequently amended, all pretreatment for incompatible pollutants discharged at each industrial plant site to the public sewer shall be consistent with the effluent guidelines published by the Environmental Protection Agency pursuant to Sections 301(b) and 304(b) of the Act.
2. 
Limitation of the volume and rate of flow discharging into the sewer system shall limit and equalize extremes of flow and waste concentration.
3. 
A payment shall be required in an amount established by the Council to cover the added cost of handling and treating the wastes. If the City requires pretreatment or equalization of flow, the design and installation of the plants and equipment shall be subject to the review and approval of the City and no construction of such facilities shall commence until said approval is obtained in writing.
4. 
When the discharge of a commercial waste causes an obstruction, damage or other impairment to the sewer system, the City may assess a reasonable charge against the discharger for the work required to clean or repair the facility.
5. 
The City may limit the quantity and rate of any waste discharge, when in its judgment, the capacity of any part of the sewer system would be overtaxed by the discharge, or the quantity or rate of discharge would impose a disproportionate cost to the operation of the sewer system. In addition to commercial and industrial waste discharges, the provisions of this subdivision shall apply to septic tank pumpages, swimming pool drainage, cooling water, geothermal water discharges, or other discharges from building heating, cooling or air conditioning systems. Discharge of any waste covered by this section shall not be discharged into the sewer system until after specific approval of the quantity and procedures proposed has been granted by the City.
(Ord. 322 § 1, 1976)
A. 
The City is required to utilize land irrigation as a method of wastewater effluent disposal during the summer dry season when there is insufficient flow for dilution in the Napa River, and it is therefore necessary to limit the concentration of boron, total dissolved solids, chlorides and sulfates that could have a toxic effect upon plant growth or degrade groundwater that could otherwise be used as a source of irrigation water.
B. 
Regulations pertaining to restriction of boron content as set forth in CMC § 13.08.345 and other sections of this chapter shall be strictly enforced.
C. 
No person or entity shall by any connection, use, maintenance, construction, alteration or repair of sanitary sewer facilities, discharge or cause to be introduced into the sanitary sewer system any substance or material which has an element of chloride or sulfate exceeding 250 milligrams per liter, or of total dissolved solids that would exceed 500 milligrams per liter. All such discharges are prohibited.
(Ord. 322 § 1, 1976; Ord. 435 § 6, 1988)
A. 
When required by the City, a discharger shall complete and file with the City, within 30 days after written notification, a waste discharge report acceptable to the City. The City may require additional information as a part of the report if, in the opinion of the City, insufficient information has been provided. On written request, the City may extend the time for filing an additional 30 days. The waste discharge report shall include, but not be limited to, nature of the process, volume, rates of flow, substances and concentrations in the waste discharge. The foregoing examples are in explanation and not in limitation of the information which the City may require.
B. 
The City may, if the discharger fails to file a waste discharge report, after notice, take action as set forth in Article XII, Section 1203, Disconnection, of the Federal Water Pollution Contract Act Amendments of 1972.
(Ord. 322 § 1, 1976)
A. 
A discharger of any industrial waste shall at the discharger's own expense, install a sampling manhole and other metering and monitoring equipment to facilitate observation, sampling, and measurement of the discharger's waste.
B. 
Such sampling facility shall be acceptable to the City for the purposes required, shall be safely located, accessible at all times, and constructed in a manner and with materials in conformance with City regulations.
C. 
These facilities shall be maintained in good condition at all times by the discharger at the discharger's expense.
D. 
Sampling facilities shall be installed within 90 days after notice by the City.
(Ord. 322 § 1, 1976)
A. 
Whenever the Director of Public Works finds that discharge of any waste is, or threatens to become, a public nuisance or a violation of established requirements, including but not limited to, the ordinance codified in this chapter, other ordinances and resolutions, the Director of Public Works shall issue an order specifying such nuisance, violations, or threatened violations, and ordering compliance within the time schedule specified therein.
B. 
Noncompliance with such order shall constitute a violation of this chapter.
(Ord. 322 § 1, 1976)
Notwithstanding the provisions of any other section of this chapter, whenever in the judgment of the Director of Public Works it appears that any waste discharge has an adverse affect on the life, health or safety of any person, or to the sewer system, the Director of Public Works is empowered to terminate service immediately.
(Ord. 322 § 1, 1976)
A. 
Grease, oil, sand traps and interceptors shall be provided for the following business or processes:
1. 
Restaurants;
2. 
Carwashes;
3. 
Breweries;
4. 
Mud baths;
5. 
Bottling plants.
In addition to those businesses or processes listed above, suspended solids that meet the criteria of CMC § 13.08.335 shall be removed prior to entering the sewer system, except that such traps or interceptors shall not be required for buildings used for residential purposes.
B. 
All traps and interceptors shall be of a type and capacity designated by the Uniform Plumbing Code (UPC), and shall be located as to be readily and easily accessible for cleaning and inspection. Other traps and/or interceptors may be used as per Section 201(E) of the UPC. In existing facilities where it can be proven by the owner that the size of trap or interceptor required by the UPC cannot be installed based on unreasonable hardship or if an existing system can be shown to be effective, a smaller capacity grease trap may be installed if the owner implements a daily monitoring program. The duration of the daily monitoring program shall be for a period of one month or until the trap has been cleaned four times. The data obtained from the monitoring program shall be recorded and used to establish a maintenance schedule. The data and maintenance schedule shall be submitted to the Department of Public Works for approval.
(Ord. 322 § 1, 1976; Ord. 462, 1991)
All grease, oil, sand traps and interceptors shall be maintained by the owner, at the owner's expense, in continuously efficient operation at all times. Any chemicals, bacteria or enzymes used in the treatment of grease shall be approved by the Director of Public Works. The owner shall keep maintenance records. The maintenance records shall contain the following information: when the trap or interceptor was cleaned, how much grease was removed, how much and when any pretreatment was used. The grease shall be disposed of to a licensed grease/oil recycling firm. Other methods of grease disposal may be used if first approved by the Department of Public Works. The method of disposal shall be verified by invoice and be kept with the maintenance records. Maintenance records shall be maintained on the premises and be available for inspection by a representative of the City. The City shall make at least one unannounced inspection a year to verify compliance with the above requirements.
(Ord. 322 § 1, 1976; Ord. 462, 1991)
Permit fees and inspections shall be required as adopted by the City and the UPC, except that for existing businesses permit fees shall be waived if the installation is performed by a licensed plumber. Permit applications shall be submitted with grease trap/interceptor sizing calculations.
(Ord. 462, 1991)
A. 
All measurements, tests and analyses of the characteristics of waters and wastes to which reference is made in this chapter shall be determined in accordance with the latest edition of "Standard Methods for the Examination of Water and Wastewater," and shall be determined at the control manhole provided for, or upon suitable samples taken at said control manhole.
B. 
In the event that no special manhole has been required, the control manhole shall be considered to be the nearest downstream manhole in the public sewer to the point at which the side sewer is connected.
(Ord. 322 § 1, 1976)
No statement contained in this chapter shall be construed as preventing any special agreement or arrangement between the City and any industrial concern whereby an industrial waste of unusual strength or character may be accepted by the City for treatment, subject to payment therefor by the industrial concern and subject to such terms and conditions as might be required by the City.
(Ord. 322 § 1, 1976)
A. 
Each discharger shall provide protection from accidental discharge of prohibited materials or other wastes regulated by this chapter. Where necessary, or as directed by the City, retention basins, dikes, storage tanks or other facilities designed to eliminate, neutralize, offset or otherwise negate the effects of prohibited materials or wastes discharged in violation of this chapter shall be installed.
B. 
Dischargers shall notify the Director of Public Works immediately when accidental discharges of wastes in violation of this chapter occur so that countermeasures may be taken by the City to minimize damage to the sewer system, treatment plant, treatment processes and the receiving waters. Such notification will not relieve dischargers of liability for any expense, loss or damage to the sewer system, treatment or treatment process, or for any fines or judgments imposed on the City on account thereof under Sections 13304 et seq., of the California Water Code or for violation of Section 5650 of the California Fish and Game Code.
C. 
In the event of accidental discharge in violation of this chapter, the discharger shall furnish the City, within 15 days of the date of occurrence, a detailed written statement describing the causes of the accidental discharge and the measures being taken to prevent future occurrences.
D. 
In order that employees of dischargers are more fully informed of City requirements, copies of the ordinance codified in this chapter shall be permanently posted on bulletin boards of each discharger together with such other industrial waste information and notices which may be furnished by the City from time to time directed toward more effective water pollution control.
E. 
Sewer connections within the discharger's plumbing or drainage system shall be appropriately labeled to warn operating personnel against discharge of any substance in violation of this chapter.
(Ord. 322 § 1, 1976)
A. 
The provisions contained in this chapter relating to pretreatment and to prohibited waste discharges and as to limitations and restrictions on waste discharges are subject to regulations by State and Federal authorities and are subject to the terms and conditions of the National Pollution Discharge Elimination System permit heretofore issued to the City.
B. 
Should the State or Federal regulations be modified or should the National Pollution Discharge Elimination System permit be amended, the requirements of this chapter shall be suspended to the extent that such new regulations or amendments to the permit shall be immediately applicable upon the effective date of such State or Federal regulations or of the amendment to the National Pollution Discharge Elimination System permit.
(Ord. 322 § 1, 1976)