(1) 
General Prohibitions. 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, state or local pretreatment standards or requirements. (40 CFR 403.5(a) and WAC 173-216-060(2)(b)(I))
(2) 
Specific Prohibitions. No user shall introduce or cause to be introduced into the POTW the following pollutants, substances, or gases, either singly or combined in a wastestream:
(a) 
Any pollutant which either alone or by interaction may create a fire or explosive hazard in the POTW, including, but not limited to, a wastestream which causes two successive readings on an explosion meter to be more than five percent nor any single reading over 10 percent of the lower explosive limit (LEL) of the meter at any point in the POTW, or is capable of creating a public nuisance (WAC 173-216-060(2)(b)(ii));
(b) 
Any pollutant which will cause corrosive structural damage to the POTW, but in no case discharges with a pH less than 6.0 or more than 9.0, or having any other corrosive property capable of causing damage or hazard to structures, equipment, or personnel of the POTW, unless the POTW is specifically designed to accommodate such discharge and the discharge is authorized by a wastewater discharge permit (40 CFR 403.5(b)(2) and WAC 173-216-060(2)(b)(iv));
(c) 
Any solid or viscous substances including fats, oils and greases in amounts which may cause obstruction to the flow in a POTW or other interference with the operation of the POTW (40 CFR 403.5(b)(3) and WAC 173-216-060(2)(b)(iii));
(d) 
Any discharge of pollutants, including oxygen-demanding pollutants (BOD, etc.), released at a flow rate and/or pollutant concentration which, either singly or by interaction with other pollutants, is sufficient to cause interference with the POTW (40 CFR 403.5(b)(4) and WAC 173-216-060(2)(b)(vi));
(e) 
Any wastestream having a temperature which will inhibit biological activity in the treatment plant resulting in interference, or causes worker health or safety problems in the collection system. In no case shall wastewater be discharged at a temperature which causes the temperature at the introduction to the POTW treatment plant to exceed 104 degrees Fahrenheit (40 degrees Celsius) unless the system is specifically designed to accommodate such a system, and the discharge is authorized under the State Waste Discharge Permit Program (40 CFR 403.5(b)(5) and WAC 173-216-060(2)(b)(v));
(f) 
Any petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin, in amounts that will cause interference or pass through (40 CFR 403.5(b)(6) and WAC 173-216-060(2)(b)(i));
(g) 
Any pollutants which result in the presence of toxic gases, vapors or fumes within any portion of the POTW in a quantity that may cause acute worker health and safety problems (40 CFR 403.5(b)(7));
(h) 
Any trucked or hauled wastes, except at discharge points designated by the city and in compliance with all applicable city requirements and during specified hours (40 CFR 403.5(b)(8));
(i) 
Any noxious or malodorous liquids, gases, solids or other wastewater which, either singly or by interaction with other wastes, are sufficient to create a public nuisance or a hazard to life, or to prevent entry into the sewers for maintenance or repair (WAC 173-216-060(2)(b)(ii));
(j) 
Any of the following discharges unless approved by the director under extraordinary circumstances such as the lack of direct discharge alternatives due to combined sewer or need to augment sewage flows due to septic conditions (WAC 173-216-060(2)(b)(vii)):
(i) 
Noncontact cooling water in significant volumes,
(ii) 
Stormwater, and other direct inflow sources,
(iii) 
Wastewater significantly affecting system hydraulic loading, which do not require treatment or would not be afforded a significant degree of treatment by the POTW;
(k) 
Any dangerous or hazardous wastes as defined in Chapter 173-303 WAC, as amended, except as allowed in compliance with that regulation (WAC 173-216-060(1) and 40 CFR part 261);
(l) 
Any substance which will cause the POTW to violate its NPDES, state waste discharge or other disposal system permits or causing the treatment plant's effluent to fail a toxicity test;
(m) 
Any substance which may cause the POTW's effluent or treatment residues, sludge, or scum to be unsuitable for reclamation and reuse or would interfere with the reclamation process or cause the POTW to be in noncompliance with sludge use or disposal criteria, guidelines or regulations developed pursuant to the federal, state or local statutes or regulations applicable to the sludge management method being used;
(n) 
Anything which imparts color which cannot be removed by the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions, which consequently imparts color to the treatment plant's effluent, thereby violating the city NPDES permit. Color (in combination with turbidity) shall not cause the treatment plant effluent to reduce the depth of the compensation point for photosynthetic activity by more than 10 percent from the seasonably established norm for aquatic life;
(o) 
Any discharge containing radioactive wastes or isotopes except as specifically approved by the director in compliance with applicable state or federal regulations including WAC 246-221-190 "Disposal by Release into Sanitary Sewerage Systems"; and meeting the concentration limits of WAC 246-221-290 Appendix A, Table I, Column 2, and WAC 246-221-300 Appendix B; and not violating any other prohibition;
(p) 
Any sludge, screenings or other residents from the pretreatment of industrial wastes or from industrial processes;
(q) 
Any medical wastes, except as specifically authorized by the director;
(r) 
Any detergents, surface-active agents or other substances in amounts which may cause excessive foaming in the POTW;
(s) 
Any incompatible substances such as grease, animal guts or tissues, paunch manure, bones, hair, hides or fleshings, entrails, whole blood, feathers, ashes, cinders, sand, spent lime, stone or marble dusts, metal, glass, straw, shavings, grass clippings, rags, spent grains, spent hops, waste paper, wood, plastics, gas, tar asphalt residues, residues from refining or processing of fuel or lubricating oil, mud, or glass grinding or polishing wastes, or any other organic or inorganic matter greater than 0.5 inches in any dimensions;
(t) 
Persistent pesticides and/or pesticides regulated by the Federal Insecticide Fungicide Rodenticide Act (FIFRA);
(u) 
Any wastewater, which in the opinion of the director, can cause harm either to the sewers, sewage treatment process, or equipment; have an adverse effect on the receiving stream; or an otherwise endanger life, limb, public property, or constitute a nuisance unless allowed under special agreement by the director (except that no special waiver shall be given from categorical pretreatment standards);
(v) 
Any slug load.
(3) 
Pollutants, substances or wastewater prohibited by this section shall not be processed or stored in such a manner that they could be discharged to the POTW.
(Ord. 1221 § 1, 1996)
National categorical pretreatment standards as adopted and hereafter amended by the EPA pursuant to the Act shall be met by all industrial users of the regulated industrial categories. These standards, found in 40 CFR Chapter I, Subchapter N, Parts 405-471, are incorporated by reference.
(Ord. 1221 § 1, 1996)
(1) 
State requirements and limitations on discharges to the POTW, as incorporated into Washington State Law by Chapter 90.48 RCW and implemented in Chapters 173-201A, 173-216 and 173-240 WAC, shall be met by all users which are subject to such standards in any instance in which they are more stringent than federal requirements and limitations, or those in this or other applicable ordinances.
(2) 
Any user determined by the city to qualify as a significant industrial user shall file an application for a State Waste Discharge Permit with Ecology in accordance with the requirements of WAC 173-216-070. Proof of acceptance of the application, and payment of permit fees shall be kept at the user's facilities, and produced upon request by the city. Failure to submit the application or rejection of the application by Ecology may be considered sufficient grounds to terminate or refuse to provide sewer service.
(Ord. 1221 § 1, 1996)
(1) 
The following pollutant limits are established to protect against pass through and interference. No person shall discharge wastewater containing in excess of the following daily maximum allowable discharge limits:
0.08 mg/l arsenic;
0.05 mg/l cadmium;
1.3 mg/l chromium;
1.5 mg/l copper;
0.4 mg/l lead;
0.02 mg/l mercury;
0.15 mg/l molybdenum;
0.95 mg/l nickel;
0.07 mg/l selenium;
0.4 mg/l silver;
3.0 mg/l zinc;
100 mg/l oil and grease (total of petroleum and vegetable based).
(2) 
The above limits apply at the point where the wastewater is discharged to the POTW (end of the pipe). All concentrations for metallic substances are for "total" metal unless indicated otherwise. Ecology may impose mass limitations in addition to or in place of the concentration-based limitations above. Where a user is subject to a categorical pretreatment standard and a local limit for a given pollutant, the more stringent limit or applicable pretreatment standard shall apply.
(Ord. 1221 § 1, 1996)
The city reserves the right, following a public hearing and public input, to amend this chapter and to establish more stringent standards or requirements on discharges to the POTW.
(Ord. 1221 § 1, 1996)
(1) 
Users with BOD or TSS levels higher than 300 mg/l in their wastestream must have an agreement with the city before commencing discharge. Within such agreements, the city may establish terms of the user's discharge to the POTW including maximum flow rates and concentrations. The city may also establish monitoring schedules to insure compliance with the agreement and fees to recover costs associated with treating such wastes. The fees shall be as established according to Article XII of this chapter. In no case will a special agreement waive compliance with a state or federal pretreatment standard or requirement including categorical standards. The user who wishes to make such a discharge must submit a formal request to the city 180 days before the discharge is to occur. The request must include all pertinent data about the discharge including, but not limited to, flow rate, time and duration of discharge(s), type and concentration of pollutants, and any other relevant information requested by the city.
(2) 
Users discharging or intending to discharge pollutants other than BOD and TSS, and claiming compatibility, must prove to the satisfaction of the director, that such pollutants are compatible with the POTW. The director may require any claim of compatibility to be endorsed by Ecology.
(Ord. 1221 § 1, 1996)
No user shall 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 an applicable pretreatment standard or requirement unless expressly authorized by an applicable pretreatment standard or requirement. The director may request Ecology impose mass limitations on users which he/she believes may be using dilution to meet applicable pretreatment standards or requirements, or in other cases when the imposition of mass limitations is appropriate.
(Ord. 1221 § 1, 1996)
(1) 
Users will procure, emplace, operate and maintain the wastewater facilities which combined with appropriate practices are necessary to achieve AKART as defined herein. Pretreatment facilities shall be designed to achieve compliance with all applicable pretreatment standards and requirements within the time limitations specified by the EPA or the state, whichever is more stringent. Detailed plans showing the pretreatment facilities and operating procedures shall be submitted to Ecology for review and approval in accordance with the procedures of Chapter 173-240 WAC, and shall be disclosed to the city before construction of the facility. The review of such plans and operating procedures will in no way relieve the user from the responsibility of modifying the facility as necessary to produce a discharge acceptable to Ecology and meet discharge limitations under the provisions of this chapter. Such facilities shall be provided, operated and maintained at the user's expense.
(2) 
Users shall comply with approved engineering reports, plans and specifications, and operations and maintenance manuals, and shall modify such documents to reflect any proposed modifications of industrial wastewater (pretreatment) facilities. Users shall submit proposals to modify pretreatment facilities to the department before implementation in accordance with Chapter 173-240 WAC. Users shall submit a copy of such revised plans and Ecology's acceptance to the director before implementing changes to approved pretreatment facilities. The city may audit the compliance of any user, and require changes in operating procedures deemed necessary by the director to ensure continued compliance with applicable requirements.
(Ord. 1221 § 1, 1996)
(1) 
Existing sources covered by one or more categorical pretreatment standards shall comply with such standards within three years of the date the standard is effective unless the pretreatment standard includes a more stringent compliance schedule. Ecology shall establish a final compliance deadline date for any existing user not covered by categorical pretreatment standards or for any categorical user when the local limits for the user are more restrictive than EPA's categorical pretreatment standards.
(2) 
New sources and new users shall comply with applicable pretreatment standards within the shortest feasible time, but in no case shall time exceed 90 days from the beginning of discharge. Prior to commencing discharge, such users shall install and start-up all pollution control equipment required to meet applicable pretreatment standards.
(Ord. 1221 § 1, 1996)
(1) 
Whenever deemed necessary, the director may require users to restrict their discharge peak flow periods, designate that certain wastewater be discharged only into specific sewers, relocate and/or consolidate points of discharge, separate sewage wastestreams from industrial wastestreams, and such other conditions as may be necessary to protect the POTW and determine the user's compliance with the requirements of this chapter.
(2) 
Grease, oil and sand interceptors shall be provided when, in the opinion of the director, they are necessary for the proper handling of wastewater containing grease and oil in excess of the limits in WMC § 14.24.080, or excessive amounts of sand. Such interceptors shall not be required for domestic users. All interceptors shall be of type and capacity approved by the director and shall be located to be easily accessible for cleaning and inspection. Each user shall maintain, inspect and clean required interceptors on a schedule that ensures they capture the intended pollutants, and prevents reintroduction into the storm or sanitary sewer systems. Users shall bear all expenses related to installation, maintenance, repair and disposal of removed materials.
(a) 
Food Service Users. Users who operate restaurants, cafes, lunch counters, cafeterias, bars or clubs, or hotel, hospital, sanitariums, factory or school kitchens, butcher shops, or other establishments where food (polar) grease may be introduced to the sewer system, shall have pretreatment facilities to prevent the discharge of fat waste, oil and grease. Such pretreatment facilities shall be either a grease interceptor or grease trap as determined by the jurisdiction located outside the building, and installed in the wastewater line leading from sinks, drains or other fixtures where grease may be discharged. Grease interceptors shall be required on all new construction projects that have a Type 1 hood exhaust system. New grease interceptors or grease traps shall be in accordance with the Uniform Plumbing Code, and any other requirements by the city as set forth herein. Grease interceptors that include dishwasher effluent shall be sized to allow sufficient detention time to allow for cooling of the effluent. No more than four fixtures shall connect to an individual grease interceptor, and no sanitary facilities will be allowed to connect upstream of any grease interceptor. Subject to the director's approval, dishwater effluent may be excluded from pretreatment. Grease traps inside the kitchen area will only be allowed under special circumstances and shall only be approved by the director on a case-by-case basis.
(b) 
Industrial/Commercial User. Users who operate automobile or truck repair facilities, steam cleaning facilities for motorized equipment, air compressor(s), or any other establishments or equipment where petroleum-based (nonpolar) grease and oil may be introduced to the sewer system, shall have pretreatment facilities to prevent the discharge of oil and grease. These pretreatment facilities shall be oil/water separators or interceptors located to collect such mixture of grease, oil and water. Such facilities shall be in accordance with city and state standards.
(c) 
Retrofit of User Facilities. Users may be required to retrofit facilities which were constructed prior to the adoption of the ordinance codified in this chapter. The requirement to retrofit shall be on a case-by-case basis, as determined by the director for compliance with city, state and federal regulations. The director may require installation of grease interceptors, grease traps or other pretreatment facilities for those facilities that violate discharge prohibitions and supplemental limitations as set forth in this chapter. In all cases, existing food service users that have a Type 1 hood exhaust system shall be required to retrofit with an approved grease trap or interceptor that is sized in accordance with the current Uniform Plumbing Code and its appendices. In deciding whether to require a user to retrofit their facilities, the director shall take into account all relevant circumstances, including but not limited to, the extent of potential harm caused by the discharge, the magnitude and duration of the discharge, economic detriment to the user, corrective actions by the user, the compliance history of the user, and any other relevant factors. Grease interceptor or grease trap size shall be determined in accordance with the Uniform Plumbing Code and any other requirements by the city as set forth herein at the time the user is notified that facility modifications are required. Sizing of grease traps or interceptors will be reviewed and may be modified at the request of the local sewer jurisdiction. All costs incurred in retrofitting a user's facility shall be the sole responsibility of the user.
(d) 
Maintenance of Grease Interceptors and/or Grease Traps. Users shall maintain grease interceptors and/or grease traps and/or other pretreatment equipment in a manner that shall prevent fat waste, oil or grease from being carried into the sewer system at all times. Authorized city employees shall be allowed access to grease traps and interceptors for the purpose of inspection and/or to verify compliance with this chapter. Fat waste, oil or grease removed from such a facility shall not be disposed of in the sanitary or storm sewer. A record of disposal shall be maintained for review by the Southwest Washington Health District and the local sewer jurisdiction.
(3) 
Users with the potential to discharge flammable substances may be required to install and maintain an approved combustible gas detection meter.
(4) 
Each user discharging more than 10,000 gallons per day or 10 percent of the average daily flow in the POTW, whichever is less, may be required by the director to install and maintain, on his/her property and at his/her expense, a suitable storage and flow-control facility to ensure equalization of flow over a 24-hour period. The facility shall have a capacity for at least 50 percent of the daily discharge volume and shall be equipped with alarms and a rate of discharge controller, the regulation of which shall be directed by the director. The city may require the user to obtain a wastewater discharge permit solely for flow equalization, or to develop a slug control plan (WMC § 14.24.150).
(Ord. 1221 § 1, 1996; Ord. 1571 § 1, 2006)
(1) 
The director may require any user to install, properly operate, and maintain, at his/her own expense, facilities to prevent slugloads or accidental discharges of pollutants to the POTW. The director may require users to produce and/or implement spill plans developed in compliance with OSHA, health, fire and ecology regulations that address POTW discharges. When such plans are required by the director they shall contain as a minimum the following elements:
(a) 
A description of discharge practices, including nonroutine batch discharges;
(b) 
A description of stored chemicals;
(c) 
Procedures for immediately notifying the city of any accidental or slugload discharges, with procedures for follow-up written notification within five days; and
(d) 
Procedures to prevent adverse impact from any accidental or slugload discharge, including, but not limited to, the following 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; and measures for emergency response.
(2) 
Users shall verbally notify the city's wastewater treatment plant immediately upon the occurrence of a slug or accidental discharge of substances regulated by this chapter and take immediate actions to correct the situation. If the treatment plant cannot be reached, the user shall try to contact City Hall. If City Hall cannot be reached, the fire department shall be notified. Immediate notification does not require placing people in jeopardy of being harmed. The notification shall include location of discharge, date and time thereof, type of waste, concentration and volume, and corrective actions. The user shall follow-up with a written notification to the director containing the same information within seven days following the discharge.
(3) 
Any user who discharges an accidental discharge or slugload shall be liable for:
(a) 
Recovery of any resultant expenses, losses and damages to the POTW;
(b) 
Recovery of any fines or settlements levied upon the city on account thereof by any government agency or court of competent jurisdiction; and
(c) 
Applicable fines and penalties assessed by the city for noncompliance with this chapter.
(Ord. 1221 § 1, 1996)
(1) 
Septic tank and liquid waste haulers may introduce substances into the POTW only at a designated receiving structure and at such times as are established by the director. No load may be discharged without prior consent of the director.
(2) 
Such wastes shall not violate any discharge prohibition or standard of this chapter or any other requirements established or adopted by the city. Wastewater discharge permits for individual vehicles to use such facilities shall be issued by the director.
(3) 
Septage haulers must provide a waste-tracking form for every load. This form shall include, at a minimum, the name and address of the waste hauler, permit number, truck identification, addresses of the sources of waste, and volume and characteristics of waste.
(4) 
Haulers of liquid wastes other than septage must provide full disclosure to the director of the source or sources of the wastewater, and such additional information as required by the director to characterize the wastewater. The director may issue an authorization on his/her own authority, or require haulers of industrial wastewater to obtain a waste discharge permit as a condition of discharge. No authorization to discharge such wastewater shall be granted until the director has determined to his satisfaction that the wastewater complies with all discharge standards, prohibitions and requirements of this chapter.
(5) 
The director may exercise absolute discretion in whether to accept any load of septage or hauled wastes. In determining whether to accept a load, the director may collect samples of each hauled load and/or require the hauler to provide a waste analysis of any load prior to discharge.
(6) 
Fees for discharge of hauled wastes will be established as part of the user fee system as authorized in this chapter.
(Ord. 1221 § 1, 1996)