Prior to the adoption of Ord. 16734 on 01/02/2001, Section 22-215 read as follows.

    Except as hereinafter provided, it shall be unlawful for any person to discharge or cause to be discharged into any sewer any of the following described substances, materials, water or wastes:

    (1)    Any liquid or vapor having a temperature higher than one hundred fifty (150) degrees Fahrenheit (sixty-five (65) degrees Celsius).

    (2)    Any pollutants with a closed cup flashpoint of less than one hundred forty (140) degrees Fahrenheit (sixty (60) degrees Celsius).

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

    (4)    Any water or wastes containing more than two hundred (200) mg/l of fat, oil or grease [emulsified oil or grease exceeding on analysis an average of one hundred (100) mg/l floatable and six hundred (600) mg/l dispersed of other soluble matter].

    (5)    Any water or wastes that contain grease or oil or other substances that will solidify or become discernibly viscous at temperatures between thirty-two (32) and one hundred fifty (150) degrees Fahrenheit (zero (0) and sixty-five (65) degrees Celsius).

    (6)    Any garbage that has not been properly shredded or comminuted to a degree that all particles will be carried freely under the flow conditions of the sewer with no particle greater than one-half inch in any dimension.

    (7)    Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, paunch manure, hair and fleshings, entrails, lime slurry, lime residues, beer or distillery slops, chemical residues, paint residues, unapproved cannery waste, bulk solids, or any other solid or viscous substance capable of causing obstruction to the flow in sewers or other interference with the proper operation of the wastewater treatment plant.

    (8)    Any water or wastes having corrosive properties capable of causing damage or hazard to pipe, structures, equipment or personnel of the wastewater treatment plant or collection system. Free acids and alkalis of such wastes must be neutralized within a permissible range of pH between 5.5 and 9.5. The director may grant variances for higher pH than 9.5, but in no event lower than 5.5.
     (9)    Any water or wastes containing a toxic or poisonous substance, that result in toxic gases, fumes, or vapors, or of high chlorine demand in sufficient quantity to injure or interfere with any POTW process, constitute a hazard to worker health and safety, or to other humans or animals, or create any hazard in the receiving waters or the effluent of the wastewater treatment plant.

    (10)    Any water or wastes which contain more than ten (10) mg/l by weight of the following gases: hydrogen sulfide, sulfur dioxide or nitrous oxide.

    (11)    Any water or wastes containing the discharge of acid pickling wastes or concentrated plating solutions, whether neutralized or not, which are capable of causing any obstruction, damage or corrosion in the sewers or the wastewater treatment plant.

    (12)    Any waters containing suspended solids of such character and quantity that unusual provision, attention or expense is required to handle such materials at the wastewater treatment plant.

    (13)    Any noxious or malodorous gas or other substance which either singly or by interaction with other wastes is capable of creating public nuisance or hazard to life or of preventing entry into sewers for maintenance and repair.

    (14)    Any waters, wastes, materials or substances which react with water or wastes in the sewer system to release noxious gases, develop color of undesirable intensity, form suspended solids in objectionable concentration, or create any other condition deleterious to structures and treatment processes.

    (15)    Any water or wastes which do not comply with applicable state and federal pretreatment standards and requirements.

    (16)    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.

    (17)    No user shall introduce or cause to be introduced into the POTW any pollutants, including oxygen-demanding pollutants (BOD, etc.), released in a discharge at a flow rate or pollutant concentration which, either singly or by interaction with other pollutants, will cause interference with the POTW.

(Ord. No. 14914, § 1, 8-5-96)