A. Quality Of Wastes: The admission into the public wastewater sewers of any waters or wastes having characteristics exceeding any of the following concentration limits shall be subject to the review and approval of the Public Works Director, and where necessary in the opinion of the Public Works Director, the owner shall provide, at his/her own expense, such preliminary treatment as may be necessary to reduce the strength below the listed limits before admission to the public sewers. Plans and specifications for pretreatment works shall be prepared by a registered engineer and must be submitted to the Public Works Director for approval.
Arsenic - .1 mg/l
BOD (Biochemical Oxygen Demand) - 350 mg/l
Baron (elemental) - 2.9 mg/l
Cadmium - 0.2 mg/l
Chlorides - 175 mg/l
Chlorinated hydrocarbons - 0.02 mg/l
Copper - 0.7 mg/l
Chromium - 0.5 mg/l
Cyanide - 1.0 mg/l
Grease or oil of animal or vegetable content - 200 mg/l
Grease or oil of mineral or petroleum origin - 100 mg/l
Hydrogen-ion concentration of pH rating less than 6.0 or more than 9.0
Iron - 3.0 mg/l
Lead - 0.1 mg/l
Mercury - 0.005 mg/l
Nickel - 1.0 mg/l
Phenolic compounds Phenols, cresols (M,O, and P) and pyrogallic acid - 1.0 mg/l
Selenium - 0.02 mg/l
Silver - 0.1 mg/l
Sulfate - 75 mg/l
Sulfide - 0.5 mg/l
Suspended solids content of 350 mg/l
Temperature - maximum 150° Fahrenheit
Total dissolved solids (TDS) - 1,000 mg/l
Zinc - 3.0 mg/l
Any whey (milk by-product), sand, grease and oil traps shall be provided when, in the opinion of the Public Works Director, they are necessary for the proper handling of liquid wastes, sand or other harmful ingredients. All traps 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 inspection and verification of cleaning.
B. Slugs And Equalized Discharge: No person shall cause the discharge of slugs of water or wastes. Each person producing discharge of a slug into the public sewers shall construct and maintain, at his/her own expense, a suitable storage and flow control facility to ensure equalization of discharge over a twenty four (24) hour period. This facility shall have a capacity of at least one hundred percent (100%) of the total normal volume discharged during a twenty four (24) hour production period unless a small size is approved by the Public Works Director, and the outlet to the sewer shall be equipped with a rate discharge controller or other approved device, the regulation of which shall be directed by the Public Works Director. (Ord. 395 N.S., 6-6-1983, eff. 7-1-1983; 1996 Code)
C. Special Agreements: No statement contained in this Chapter shall be construed as prohibiting any special agreement or arrangement between the City and any person whereby an industrial waste of unusual strength or character may be admitted to the wastewater collection system, either before or after pretreatment, provided that there is no impairment of the functioning of the wastewater treatment plant by reason of the admission of such wastes, and no extra costs are incurred by the City without recompense by the person. (Ord. 395 N.S., 6-6-1983, eff. 7-1-1983)