No waste shall be discharged into the streets, drainage ways or any property which is dangerous to the public health and safety. No waste shall be discharged in the public sewer system which endangers the normal operation of the public sewage system.
   A.   Pretreatment: If the town engineer permits the pretreatment or equalization of waste flows, the design and installation of the plants and equipment shall be subject to the review and approval of the town and subject to the requirements of all applicable codes, ordinances and laws.
   B.   Industrial Waste Into Public Sewers; Admission, Control:
      1.   This subsection shall apply to industrial waste as previously defined, and further to waste from industries which exhibit strengths or characteristics of BOD in excess of or equal to two hundred (200) milligrams per liter (mg/l) or suspended solids in excess of or equal to one hundred fifty (150) (mg/l) based on a composite sample of the waste.
      2.   Review and acceptance by the town shall be obtained prior to the discharge into the public sewers of any waste having a BOD greater than two hundred (200) milligrams per liter or a suspended solids content greater than one hundred fifty (150) milligrams per liter.
      3.   Where required, in the opinion of the town engineer, to modify or eliminate waste that are harmful to the structures, processes or operation of the sewage treatment works, the person shall provide at his expense such preliminary treatment or processing facilities as may be determined necessary to render his waste acceptable for admission to the public sewers.
      4.   Any industry discharging waste from canning, freezing or food packing operation shall provide pretreatment which shall include, but not limited to, vibrating or rotary screens to remove any particulate larger than #40 screen.
      5.   The volume of flow used for computing industrial waste charges shall be the metered water consumption of the person as shown in the records of meter readings. If the person discharging industrial waste into the public sewers procures any part, or all, of his water from sources other than the town, all of a part of which is discharged into the public sewers, the person shall install and maintain, at his expense, water meters of a type approved by the town engineer for the purposes of determining the volume of water obtained from these other sources.
      6.   Devices for measuring the volume of waste discharged may be installed, owned and operated by the person following approval of the town engineer.
      7.   Industrial waste discharged into public sewers shall be subject to periodic inspection and a determination of character and concentration of said waste. The determinations shall be made as often as may be deemed necessary by the town engineer. The samples collected shall be representative and collected either manually or by the use of mechanical equipment acceptable to the town engineer. Access to the sampling locations shall be granted to the town engineer or his duly authorized representatives at all times. All required tests shall be ran by the industrial user or his duly authorized representatives, and copies of the test results provided to the town engineer.
      8.   If, in the opinion of the town engineer, tests taken of industrial waste show the character or concentration of these waste to be in excess of those limits acceptable in the treatment facilities or, if indications that waste discharged from a new industrial applicant's process may exceed the allowable limits established by the Arizona department of health services and the United States environmental protection agency, the town shall have the authority to request negotiations with representatives of the industry concerned to arrive at any special agreements concerning pretreatment and/or payment of any surcharge or additional service charges necessary for additional town facilities.
   C.   Service Charges: The amount of any surcharge or additional service charge shall reflect the cost incurred by the town in removing the excess BOD and suspended solids or other waste characteristics should an industrial user exceed the acceptable limits as set by the town. (2006 Code)