Chapter 13.32
INDUSTRIAL WASTES
Sections:
13.32.030 Preliminary treatment.
13.32.040 Screens for food processing operations.
13.32.050 Water meter required.
13.32.060 Special agreements for pretreatment.
13.32.070 Required collection systems – Permit requirements.
13.32.010 Applicability.
This chapter shall apply to industrial wastes as previously defined and further to wastes from industries which exhibit strengths or characteristics of BOD in excess of or equal to 200 milligrams per liter (mg/1) or suspended solids in excess of or equal to 150 milligrams per liter based upon a composite sample of the waste. The “composite sample” means not less than 12 individual samples taken at not less than 30-minute intervals for a period of not less than six hours. (Ord. 332 § 10, 1984)
13.32.020 Discharge review.
Review and acceptance of the city shall be obtained prior to the discharge into the public sewers of any waste having a BOD greater than 200 milligrams per liter or a suspended solids content greater than 150 milligrams per liter. (Ord. 332 § 11, 1984)
13.32.030 Preliminary treatment.
Where required, in the opinion of the superintendent or his authorized representative, to modify or eliminate wastes 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 wastes acceptable for admission to the public sewers. (Ord. 332 § 12, 1984)
13.32.040 Screens for food processing operations.
Any industry discharging waste from a canning, freezing or food-packing operation shall provide pretreatment or include but not be limited to vibrating or rotary screens to remove any particle larger than 20-mesh. (Ord. 332 § 13, 1984)
13.32.050 Water meter required.
The volume of flow used for computing industrial waste charges shall be metered water consumption. A person discharging industrial wastes into the public sewers shall install and maintain at his expense water meters of a type approved by the superintendent for the purposes of determining the volume of water used. (Ord. 332 § 14, 1984)
13.32.060 Special agreements for pretreatment.
A. If, in the opinion of the superintendent, tests taken of industrial wastes show the character or concentration of these wastes to be in excess of those limits acceptable in the treatment facilities or, if indications that wastes discharged from a new industrial applicant’s process may exceed the allowable limits established, the city shall have the authority to request negotiations with representatives of the industry concerned to arrive at any special agreement concerning pretreatment and/or payment of any surcharge or additional service charges necessary for additional city facilities.
B. The amount of any surcharge or additional service charges shall reflect the cost incurred by the city in removing the excess BOD and suspended solids or other waste characteristics should an industrial user exceed the acceptable limits asset by the city. (Ord. 332 § 15, 1984)
13.32.070 Required collection systems – Permit requirements.
Industrial plants may be required to have separate collection systems: one system to be installed for customary sanitary sewerage connected directly to the city system; a second system to be installed to collect processing wastes from shop sinks, floor drains, wash stations, plating or cleaning works, and all other industrial waste sources. This system shall discharge into an exterior concrete sump of sufficient capacity to hold at least one day’s discharge from these sources and be connected to the city system only by a valved overflow. The sump shall be readily accessible for inspection and analysis by the city, and only properly treated or neutralized wastes will be allowed to flow into the city system. The city reserves the right to require that city approval be secured for each incident of discharge by permit. (Ord. 332 § 16, 1984)