Chapter 6.12


6.12.010    Unlawful Deposit, Treatment, and Disposal of Sewage

6.12.020    Unlawful Discharge into Public Sewers

6.12.030    Grease, Oil and Sand Interceptors

6.12.040    Pre –Treatment

6.12.050    Protection from Damage

6.12.010 Unlawful Deposit, Treatment, and Disposal of Sewage.

(a)    It shall be unlawful for any person to place, deposit or permit to be deposited in an unsanitary manner upon public or private property with the City, or in any area under the jurisdiction of the City, any human or animal excrement, garbage, or other objectionable waste.

(b)    It shall be unlawful to discharge into any natural outlet within the City, or in any area under the jurisdiction of the City, any sewage, industrial wastes, or other polluted waters, except where suitable treatment has been provided.

(c)    Except as may be otherwise provided by the Director, it shall be unlawful to construct or maintain any private privy, privy vault, septic tank, cesspool, or other private facility intended or used for the disposal of sewerage within the City.

6.12.020 Unlawful Discharge into Public Sewers.

No person shall discharge or cause to be discharged any storm water, surface water, roof runoff, subsurface drainage, cooling water, or unpolluted industrial process water to any sanitary sewer. Except as hereinafter provided, no person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewer:

(a)    Any liquid or vapor having a temperature higher than 150 F.

(b)    Any water, or waste which may contain more than 100 parts per million, by weight, of fat, oil, or grease.

(c)    Any gasoline, benzine, naphtha, fuel oil, lube oil, or other flammable or explosive liquid, solid, or gas.

(d)    Any garbage that has not been properly shredded.

(e)    Any ashes, cinders, sand, mud, straw, shavings, kitty litter, human or animal hair or fur, metal, glass, rags, feathers, tar, plastics, wood, paunch manure, or any other solid or viscous substance capable of causing obstruction to the flow in sewers or other interference with the proper aeration, care and maintenance of public sewers and the sewage treatment plant. (Ord. 476, 1995)

(f)    Any waters or wastes having a pH lower than 5.5 or higher than 9.0 or having any other corrosive property capable of causing damage or hazard to structures, equipment, and personnel of the District, personnel of the City or the sewage treatment plant. (Ord. 679, Sec. 3, 2003; Ord. 476, 1995)

(g)    Any waters or wastes containing toxic or poisonous substance in sufficient quantity to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, or create any hazard in the receiving waters of the sewage treatment plant.

(h)    Any waters or wastes containing suspended solids of such character and quantity that unusual attention or expense is required to handle such materials at the sewage treatment plant.

(i)    Any noxious or malodorous gas or substance capable of creating a public nuisance.

6.12.030 Grease, Oil and Sand Interceptors.

(a)    Grease, oil and sand interceptors shall be provided when, in the opinion of the Public Works Director, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts, or any flammable wastes, sand and other harmful ingredients.

(b)    Such interceptors shall be of a type and capacity approved by the Public Works Director and shall be so 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.

(c)    Where installed, all grease, oil and sand interceptors shall be maintained by the owner, at his expense, for continuously efficient operation at all times.

6.12.040 Pre –Treatment.

(a)    The admission into the public sewer of any waters or wastes having the below listed characteristics shall be subject to the prior review and approval of the Public Works Director:

(1)    A 5-day B.O.D. greater than 300 parts per million weight, or

(2)    Containing more than 350 parts per million weight of suspended solids, or

(3)    Containing any quantity of substances having the characteristics described in this section, or

(4)    Having an average daily flow greater than 2% of the average daily sewage flow of the City (Ord. 476, 1995)

(b)    Where necessary in the opinion of the Public Works Director, the owner shall sign a formal contract to provide, at his expense, such preliminary treatment and other requirements as may be necessary to:

(1)    Reduce the B.O.D. to 300 parts per million by weight, and the suspended solids to 350 parts per million by weight, or

(2)    Reduce objectionable characteristics or constituents to within the maximum limits provided for in this section, or

(3)    Control the quantities and rates of discharge of such water or wastes.

(4)    Control the quantities and rates of discharge of such water or wastes from commercial-zoned property to the peak rate of 2,700 gallons per acre per day (gpad) and from industrial-zoned property to the peak rate of 1,350 gpad.

(5)    Provide metering and testing acceptable to the Public Works Director to ensure the maximum limits provided in this section. (Ord. 679, Sec. 4, 2003; Ord. 476, 1995)

(c)    Plans, specifications and other pertinent information relating to proposed preliminary treatment facilities shall be submitted for the approval of the Public Works Director and the Lake Stevens Sewer District, and the Washington State Department of Ecology, when required by law, and no construction of such facilities shall be commenced until such approvals are obtained in writing. Any expenses incurred by the City in reviewing such plans, specifications and information shall be paid by the property owner or his representatives before the City’s approval shall issue.

(d)    Where preliminary treatment facilities are provided for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at his expense.

(e)    When required by the Public Works Director, the owner of any property served by a building sewer carrying industrial wastes shall install a suitable control manhole in the building sewer to facilitate observation, sampling and measurement for the wastes. Such manhole, when required, shall be accessibly and safely located, and shall be constructed in accordance with plans approved by the Public Works Director. The manhole shall be installed by the owner at his expense and shall be maintained by him so as to be safe and accessible at all times.

(f)    All measurements, tests and analyses of the characteristics of waters and wastes to which reference is made in this section shall be determined in accordance with “Standard Methods for the Examination of Water and Sewage,” and shall be determined at the control manhole provided for in this section, or upon suitable samples taken at such control manhole. 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 to which the building sewer is connected.

(g)    Nothing in this section shall be construed as preventing any special agreement or arrangement between the City and the manufacturing of any industrial waste whereby industrial waste of unusual strength or character may be accepted by the City for treatment, subject to payment therefor by that manufacturer.

6.12.050 Protection from Damage.

No unauthorized person shall maliciously, willfully, or negligently break, damage, destroy, uncover, deface or tamper with any structure, appurtenance, or piece of equipment which is a part of the City sewage works. (Ord. 476, 1995)