§ 28-175. Pretreatment of wastewater.

(a)

Pretreatment facilities. Users shall provide wastewater treatment as necessary to comply with this division and shall achieve compliance with all categorical pretreatment standards, local limits, and the prohibitions set out in section 28-174(a) of this division within the time limitations specified by EPA, the state, or the director of public works, whichever is more stringent. Any facilities necessary for compliance shall be provided, operated, and maintained at the user's expense. Detailed plans describing such facilities and operating procedures shall be submitted to the director of public works for review, and shall be acceptable to the superintendent before such facilities are constructed. The review of such plans and operating procedures shall in no way relieve the user from the responsibility of modifying such facilities as necessary to produce a discharge acceptable to the city under the provisions of this division.

(b)

Additional pretreatment measures.

(1)

Whenever deemed necessary, the director of public works may require users to restrict their discharge during peak flow periods, designate that certain wastewater be discharged only into specific sewers, relocate and/or consolidate points of discharge, separate sewage wastestreams from industrial wastestreams, and such other conditions as may be necessary to protect the POTW and determine the user's compliance with the requirements of this division.

(2)

The director of public works may require any person discharging into the POTW to install and maintain, on their property and at their expense, a suitable storage and flow-control facility to ensure equalization of flow. A wastewater discharge permit may be issued solely for flow equalization.

(3)

Grease, oil, and sand interceptors shall be provided when, in the opinion of the director of public works, they are necessary for the proper handling of wastewater containing excessive amounts of grease and oil, or sand; except that such interceptors shall not be required for residential users. All interception units shall be of type and capacity approved by the director of public works and shall be so located to be easily accessible for cleaning and inspection. Such interceptors shall be inspected, cleaned, and repaired regularly, as needed, by the user at their expense.

(4)

Users with the potential to discharge flammable substances may be required to install and maintain an approved combustible gas detection meter.

(c)

Accidental discharge/slug control plans. At least one (1) time the city shall evaluate whether each significant industrial user needs an accidental discharge/slug control plan. This evaluation must be conducted within one (1) year of being designated a significant industrial user. The director of public works may require any user to develop, submit for approval, and implement such a plan. Alternatively, the director of public works may develop such a plan for any user. An accidental discharge and/or a slug control plan shall address, at a minimum, the following:

(1)

Description of discharge practices, including nonroutine batch discharges;

(2)

Description of stored chemicals;

(3)

Procedures for immediately notifying the director of public works of any accidental or slug discharge, as required by subsection 28-178(f). Significant industrial users must also immediately notify the director of public works of any changes at their facilities not already addressed in their slug control plan or other slug requirements affecting slug discharge potential: and

(4)

Procedures to prevent adverse impact from any accidental or slug discharge. Such procedures include, but are not limited to, inspection and maintenance of storage areas, handling and transfer of materials, loading and unloading operations, control of plant site runoff, worker training, building of containment structures or equipment, measures for containing toxic organic pollutants, including solvents, and/or measures and equipment for emergency response.

(d)

Hauled wastewater.

(1)

Septic tank waste may be introduced into the POTW only at locations designated by the director of public works, and at such times as are established by the director of public works. Such waste shall not violate section 28-174 of this division or any other requirements established by the city. The director of public works may require septic tank waste haulers to obtain wastewater discharge permits.

(2)

The director of public works shall require haulers of industrial waste to obtain wastewater discharge permits. The director of public works may require generators of hauled industrial waste to obtain wastewater discharge permits. The director of public works also may prohibit the disposal of hauled industrial waste into the POTW. The discharge of hauled industrial waste is subject to all other requirements of this division.

(3)

Industrial waste haulers may discharge loads only at locations designated by the director of public works. No load may be discharged without prior consent of the director of public works. The director of public works may collect samples of each hauled load to ensure compliance with applicable standards. The director of public works may require the industrial waste hauler to provide a waste analysis of any load prior to discharge.

(4)

Industrial waste haulers must provide a waste-tracking form for every load. This form shall include, at a minimum, the name and address of the industrial waste hauler, permit number, truck identification, names and addresses of sources of waste, and volume and characteristics of waste. The form shall identify the type of industry, known or suspected waste constituents, and whether any wastes are RCRA hazardous wastes.

(5)

The reports and other documents required to be submitted or maintained shall be subject to:

a.

The provisions of 18 U.S.C. section 1001 relating to fraud and false statements;

b.

The provisions of section 309(c)(4) of the Act, as amended, governing false statements, representation or certification; and

c.

The provisions of section 309(c)(6) regarding responsible corporate officers.

(Ord. No. 99-12, § 2(3.1—3.4), 8-17-99; Ord. No. 2006-03, § 10, 1-24-06; Ord. No. 2010-11, § 5, 7-20-10)