Except as provided in this article, no person shall discharge or cause to be discharged any of the following described waters or wastes to any public sanitary sewer or storm sewer:
(A) Any liquid or vapor having a temperature higher than 150°F;
(B) Any waters or wastes containing:
(1) Floatable grease, oil, or fat of animal or vegetable origin in excess of 25 milligrams per liter;
(2) Floatable grease, oil, or fat of mineral origin in excess of 10 milligrams per liter; and
(3) Dispersed grease, oil, or fat in excess of 200 milligrams per liter;
(C) Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid, or gas;
(D) Any garbage which has not been properly shredded;
(E) Any ashes, sand, mud, straw, shavings, metal, glass rags, feathers, tar, plastics, wood, 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 sewerage system;
(F) Any waters or wastes having a pH lower than 6.5 or higher than 9.0 or having any other corrosive property capable of causing damage or hazard to the structures, equipment, and personnel of the sewerage works;
(G) (1) Any waters or wastes containing a 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. The following is a partial list of toxic substances and their maximum concentration allowable for admission into the public sewer system:
Maximum Allowable
Toxic Concentration
Substances (mg/liter)
Toxic Concentration
Substances (mg/liter)
Alcohols 100
Aldehyde 5.0
Aluminum 5.0
Arsenic and arsenicals 1.0
Barium 5.0
Beryllium 5.0
Boron 10.0
Bromine, iodine, and chlorine 50.0
Cadmium 0.1
Chromium and chromium salts 0.5
Copper and copper salts 0.5
Creosols and creosotes 2.0
Cyanides and nitriles 0.2
Fluorine 1.5
Formaldehyde 5.0
Iron 5.0
Lead 0.5
Manganese 0.5
Mercury and mercurials (as mercury) 0.01
Methyl ethyl ketone and related substances 5.0
Nickel 5.0
Phenols and their derivatives 0.5
Selenium 2.0
Silver and silver compounds (as silver) 0.05
Toluene 5.0
Xylene 5.0
Zinc compounds (as zinc) 1.0
(2) None of the following substances will be allowed unless specifically approved in writing by the City Engineer: algacides, antibiotics, bacteri-cides, fungicides, insecticides, sulfonamides, and dyes; strong oxidizing agents, such as chromates, dichromates, permanganates, peroxides, and the like; and strong reducing agents, such as nitrates, sulfides, sulfites, thiosulfates, and the like.
(3) The maximum allowable concentration of toxic or potentially toxic materials not listed in this division will be determined by the City Engineer on an individual basis.
(4) In no event shall any individual waste discharged to the public sewers have a 96 hour median tolerance limit (TLm), as determined by the Routine Fish Bioassay Method, of less than 25%.
(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 substances which by themselves or by interaction with other wastes may create a nuisance or hazard or make human entry into the sewers extraordinarily hazardous;
(J) Any garbage or any fruit, vegetable, animal, or other solid material from any food-processing plant or other industrial plant, irrespective of whether or not the same has been first passed through a mechanical grinder, and no person shall install, operate, use, or maintain upon the premises of any food-processing plant, or any other industrial plant, any mechanical garbage or waste grinder that is connected directly or indirectly to the sanitary sewer system of the city, or any part thereof;
(K) Any water or waste having a five day bio-chemical oxygen demand greater than 300 milligrams per liter;
(L) Any water or waste which exerts or causes excessive discoloration;
(M) Any water or waste having greater than 350 milligrams per liter of suspended solids;
(N) Any unusual volume of flow or concentra-tion of wastes constituting a “slug” where “slug” is defined as any discharge of water, sewage, or industrial 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 operation;
(O) Any water or wastes containing dissolved sulfides in excess of 1.0 milligram per liter;
(P) Any water or wastes containing substances which are not amenable to treatment or reduction by the sewage treatment processes employed, or are amenable to treatment only to such degree that the sewage treatment plant effluent cannot meet the discharge requirements established by the State Water Resources Control Board or the Regional Water Quality Control Board;
(Q) (1) Any storm water, surface water, ground water, roof runoff, subsurface drainage, uncontaminated cooling water, or unpolluted industrial process water;
(2)
UNPOLLUTED WATER shall mean any water within the following limits of quality:
pH 7.0 min., 8.5 max.
Dissolved solids 1,000 mg/liter, max.
Biochemical oxygen demand 5 mg/liter, max.
Suspended solids 5 mg/liter, max.
Settleable solids 0.1 mg/liter, per hour, max.
Grease of oil None
Color or odor None
Toxic None
(R) River water which has not been contaminated by industrial or other use.
('66 Code, § 6-4.109) (Ord. 409-C-S, passed 8-9-79) Penalty, see §§ 1-2.01 et seq.