Oroville Municipal Code Art. 2 Industrial Wastes

A. The application and approval procedures of this chapter shall be exercised jointly and concurrently with the sewerage commission.

B. Each person desiring to make a new connection to the city sewerage facilities for the purpose of discharging industrial wastes shall prepare and file with the city an application that shall include actual or predicted data relating to the quantity and characteristics of the waste to be discharged.

(Ord. 1200 Art. 3, § 1)

A. Review and acceptance of the city shall be obtained prior to the discharge into the city sewerage facilities of any water or wastes having:

1. A total of more than 30 pounds of suspended solids in any one day;

2. A total of more than 30 pounds of BOD in any one day;

3. Any organic or inorganic constituent which, in the opinion of the sewerage commission, may produce an unusual or deleterious effect on the regional sewerage system.

B. The city may refuse to accept industrial waste which, in the judgment of the city would be harmful or potentially harmful to the structures, processes or operation of the city sewerage facilities.

(Ord. 1200 Art. 3, § 1)

A. Where required in the opinion of the city to modify or eliminate wastes that are harmful to the structures, processes or operation of the city sewerage facilities, the person shall provide at his or her expense such preliminary treatment or processing facilities which, in the opinion of the city, may be necessary to render his or her wastes acceptable for admission to the city sewerage facilities.

B. Nothing in this chapter is intended to indicate that the city assumes any responsibility or liability for design, installation or modification for facilities that may be required to make wastes acceptable for admission to the city sewerage facilities.

C. All wastes containing soil, dirt and/or sand shall be settled a minimum of 2 hours in an acceptable basin before discharge to a sewer.

D. All industrial wastes must be passed through approved self-cleaning, 20-mesh screens, unless otherwise allowed by the city. The city shall have the right to require 40-mesh screens for an industrial waste if, in their opinion, such screens are necessary to protect or insure the satisfactory operation of the city sewerage facilities.

(Ord. 1200 Art. 3, § 1)

The following monitoring requirements shall be imposed concurrently with requirements of the sewerage commission.

A. Annually, on July 1st of each year and at such other times as may be directed by the city, each person who discharges industrial wastes to the city sewerage facilities shall prepare and file with the city a report that shall include pertinent data relating the quantity and characteristics of the waste discharge to the city sewerage facilities.

B. Each person discharging industrial waste into the city sewerage facilities may, at his or her option, or shall when directed by the city, construct and maintain approved measurement, sampling and sample storage facilities for all waste entering into the city sewerage facilities. These facilities may be used by the city to obtain flow, ROD and suspended solids data.

In lieu of directing the construction of measurement sampling and sample storage facilities, the city may direct that a person discharging industrial waste into a public sanitary sewer must procure, at the person's expense and in a manner approved by the city, sufficient composite samples on which to base and compute the person's industrial waste connection charge and sewer service charge. In the event that automatic flow measurement, sampling and sample storage facilities are not provided, the industrial waste charge shall be computed using the metered water flow to the premises as a basis for the waste flow and laboratory analysis of samples procured as directed by the city as a basis for determining BOD and suspended solids and other constituent content of the waste as required. Metered water flow shall include all water delivered to or used on the premises and which is discharged to the city sewerage facilities. In the event that private water supplies are used, they shall be metered at the person's expense. Cooling waters or water not discharged to the city sewerage facilities shall be separately metered at the person's expense in a manner approved by the city prior to allowing the deduction of such flow from the total water used on the premises in computing the industrial waste sewer service charge.

C. If so directed by the city, all devices, access facilities and related equipment deemed necessary by the city shall be installed by the person discharging the waste, at his or her expense, and shall be maintained by him or her so as to be in a safe condition, in proper operating condition at all times, and readily accessible to city personnel during the operating day.

The flow measurement device can be a Parshall flume, weir, venturi nozzle, magnetic flowmeter, or any other type of device providing accurate and continuous flow indication. Pump timers or other indirect measurement devices will not be acceptable.

The flowmeter shall be suitable for indicating and totalizing the flow in terms of millions of gallons passing through the device provided above, with an error not exceeding plus or minus 5%. The instrument shall be equipped with a set of electrical contacts arranged to momentarily close a circuit to energize a process time and sampling device for every fixed quantity of flow. This quantity should be selected so as to insure a minimum of 50 samples per operating day. Other control variations will be acceptable if it can be demonstrated that the sampling procedure will result in a waste sample which is proportional to the waste flow. The length of operation of the sampling device shall be dependent on the type of sampling arrangement used, but in no case shall the daily collected sample be less than 2 quarts in volume.

The method of sampling used can be by continuous pumping past a solenoid operated valve, direct pumping into the sample container, continuous pumping past a sampler dipper calibrated to remove a constant sample, by a proportional dipper sampler operating directly in the waste flow, or by any other approved means. All samples must be continuously refrigerated at a temperature of 39 degrees Fahrenheit, plus or minus 5 degrees.

The person discharging the waste shall keep flow records as required by the city and shall provide qualified personnel to properly maintain and operate the facilities.

D. The waste samples will be analyzed by sewerage commission personnel or consultants. Laboratory methods used in the examination of industrial wastes shall be those set forth in Standard Methods. However, alternate methods for certain analysis of industrial wastes may be used.

(Ord. 1200 Art. 3, § 2)

Except as otherwise provided in this chapter, no person shall discharge into the city sewerage facilities:

A. Any solids, liquids or gases which may, by themselves or by interaction with other substances, cause fire or explosive hazards, or in any other way be injurious to persons, property or the operation of the district sewerage facilities.

B. Any noxious or malodorous solids, liquids or gases which, either alone or by interaction with other substances, are capable of creating a public nuisance or hazard to life or preventing entry into sewers for their maintenance or repair.

C. Any solids, greases, waxes, slurries or viscous material of such character or in such quantity that, in the opinion of the city, may cause an obstruction to the flow in the sewer, or otherwise interfere with the proper functioning of the city sewerage facilities.

D. Any toxic substance, chemical elements or ions, or compounds in quantities sufficient to impair the operation or efficiency of the city sewerage facilities, or that will pass through the city sewerage facilities and cause the effluent thereof to exceed state and national pollution discharge elimination system requirements applicable to the sewerage commission.

E. Any liquids having a pH lower than 5.5 or higher than 9.0 or having any corrosive property capable of causing damage or hazards to structures, equipment or personnel of the sewage disposal works.

F. Any radioactive isotopes, without obtaining a special permit from the city.

G. Any liquid or vapor having a temperature greater than 140 degrees Fahrenheit or 60 degrees centigrade.

H. Any garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor of 3/4 horse power (0.76 hp metric) or greater shall be subject to the review and approval of the director of public works.

I. Any ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, paunch manure, hair or other solid capable to causing obstruction to the flow in sewers or other interference with proper operation of the city sewerage facilities.

J. Stormwaters, surface waters or any drain waters, other than sanitary sewage from dwelling units, dwelling unit equivalents, nonresidential establishments and approved industrial wastes.

K. No person shall discharge any holding tank waste into the city sewer system except from an installation approved and licensed by the city and the manager-superintendent.

(Ord. 1200 Art. 3, § 3)

The Industrial Pretreatment Program (IPP) of the Sewerage Commission-Oroville Region (SC-OR) is adopted by reference and made a part of this chapter as though set forth in its entirety. IPP modifications per SC-OR Resolution 07-02 consisting of local limits for total dissolved solids (6,500 milligrams per liter or mg/l) and chloride (1,200 mg/l) are also adopted by reference and made a part of this chapter.

(Ord. 1634 § 1; Ord. 1662 § 1)

The city council does hereby authorize SC-OR to implement and enforce within the city's sewer service area the provisions of the IPP as adopted by Section 13.04.220. SC-OR, its employees and agents are authorized to provide inspections and other activities on behalf of the city in accordance with the IPP and to take enforcement actions to the extent permitted by federal, state and local law.

(Ord. 1634 § 2)

No industrial users (IUs) within the city's service area shall be connected to SC-OR's facilities without first obtaining a permit from the city and in a form approved by SC-OR, under which IUs shall agree to fully and strictly comply with the terms and conditions of the IPP.

(Ord. 1634 § 3)