§ 106-127. 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 prohibited discharge standards within the time limitations specified by EPA, the state, or the director, whichever is more stringent. Any facilities necessary for compliance shall be provided, operated, and maintained in working order, at the user's expense. Detailed plans describing such facilities and operating procedures shall be submitted to the director for review, and shall be acceptable to the director 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 DWR under the provisions of this division.

(b)

Degree of pretreatment required. All pollutants discharged from an IU to the POTW shall receive such pretreatment or corrective action so as to ensure compliance with the terms and conditions of the issued pretreatment permit and with the following whenever applicable:

(1)

Limitations, prohibitions and pretreatment standards and requirements promulgated by the EPA pursuant to section 307 of the Act and as described in subparagraph 391-3-6.08(3)(a)2 of EPD regulations.

(2)

Until such time as such limitations, prohibitions and pretreatment standards and requirements are formally promulgated pursuant to section 307 of the Act, DWR may apply such limitations, prohibitions and pretreatment standards necessary to achieve the purpose of said section of the Federal Act. Such limitations, prohibitions or pretreatment standards shall be based upon an assessment of technology and processes, to wit:

a.

For existing IUs, limitations or pretreatment standards and requirements may be based upon application of the best demonstrated control technology currently available;

b.

For IUs whose construction commences after the effective date of the ordinance from which this division is derived, pretreatment standards and requirements which reflect the greatest degree of effluent reduction which DWR determines to be achievable through the application of best demonstrated control technology currently available, or changes in processes or operating methods or other alternatives, including, where practical, a standard permitting no discharge of pollutants.

(3)

Notwithstanding the above, more stringent pretreatment may be required as deemed necessary by DWR to comply with the following:

a.

Any other existing federal laws or regulations;

b.

Any applicable state water quality standards, POTW effluent limitations, local discharge limitations, national applicable general and specific prohibitions, pretreatment standards for prohibited discharges as specified in 40 CFR 403.5, dilution prohibition as specified in 40 CFR 403.6(d), pretreatment standards and requirements, or schedules of compliance;

c.

Prohibition of interference or pass through.

(4)

Prohibit the discharge of toxic pollutants in toxic amounts which interfere with, pass through, prevent the use or disposal of sewage sludge, or otherwise impede operation of the POTW.

(c)

Additional pretreatment measures.

(1)

Whenever deemed necessary, the director 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 waste streams from industrial waste streams, 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 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. An individual wastewater discharge permit may be issued solely for flow equalization.

(3)

Oil and sand interceptors shall be provided when, in the opinion of the director, they are necessary for the proper handling of wastewater containing excessive amounts of oil or sand; except that such interceptors shall not be required for residential users. All interception units shall be of a type and capacity approved by the director, shall comply with division 3 of this article, and shall be so located to be easily accessible for cleaning and inspection. Such interceptors shall be inspected, cleaned, and repaired by the user at the user's expense.

(4)

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

(d)

Accidental discharge and slug discharge control plans. The director shall evaluate whether each IU needs an accidental discharge/slug discharge control plan or other action to control slug discharges. The director may require any user to develop, submit for approval, and implement such a plan or take such other action that may be necessary to control slug discharges. Alternatively, the director may develop such a plan for any user. An accidental discharge/slug discharge 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 any accidental or slug discharge; 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.

(e)

Hauled wastewater.

(1)

Septage. Septic tank waste or septage may be introduced into the POTW only at locations designated by the director, and at such times as are established by the director.

a.

All persons owning or operating septage pump trucks shall not discharge, directly or indirectly, wastewater into the POTW unless such person shall first have applied for and received a mobile discharge operation (MDO) permit from DWR.

1.

Each septage hauler is required to comply with "Rules for Mobile Discharge Operators in Gwinnett County," which is available at DWR.

2.

Septage haulers shall not discharge into the county any sewage which originated outside of the boundaries of the county. Anyone found guilty of discharging into the county septage waste which originated outside of the county shall be subject to an administrative fine not exceeding $1,000.00.

b.

The director shall designate the locations and times where septage truck contents may be discharged, and may refuse to accept any truckload of waste where it appears to the county that the waste could interfere with the effective operation of the POTW. Further, it shall be the responsibility of the dumping vehicle operator to prove to the wastewater treatment plant operator the contents of his load and its source prior to dumping. The director may collect samples of each hauled load to ensure compliance with applicable standards. Anyone found guilty of discharging into the county's POTW system at a location not approved for dumping shall be subject to an administrative fine not exceeding $1,000.00 for each incident.

c.

Septage shall not violate the prohibited discharge standards or any other requirements established by the county, with the following exception: hauled septage approved for direct disposal at a water reclamation facility is not required to meet the local limits for BOD ₅ , TSS, NH ₃ -N, Phosphorus, and FOG.

(2)

Hauled industrial waste. The director may require haulers of industrial waste to obtain individual wastewater discharge permits or general permits. The director may require generators of hauled industrial waste to obtain individual wastewater discharge permits or general permits. The director also may prohibit the disposal of any hauled industrial waste at the director's sole discretion.

a.

Bonds for hauled industrial waste. The director may require haulers or generators of hauled waste to post bonds in an amount set by the director.

b.

Approved sites for discharge of hauled industrial waste. Industrial waste haulers may discharge loads only at locations designated by the director. No load may be discharged without prior consent of the director.

c.

Hauled industrial waste sampling and right to refuse. The director may collect samples of each hauled load to ensure compliance with applicable standards. The director may require the industrial waste hauler to provide a waste analysis of any load prior to discharge and may refuse acceptance, at DWR's sole discretion, based upon analytical results or upon POTW loading or capacity.

d.

Hauled industrial waste manifests. 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. The disposal of RCRA waste at the POTW is prohibited unless expressly permitted by the director in writing in advance of such disposal.

e.

Local limitations. The discharge of hauled industrial waste is subject to all other requirements of this division, with the exception of local limits for BOD ₅ , TSS, NH ₃ -N, Phosphorus, and FOG in hauled waste approved for direct disposal at a water reclamation facility.

f.

Fees and charges. Hauled industrial waste may be subject to high-strength surcharges in addition to fees for the disposal of hauled waste.

(Code 1994, § 114-93; Ord. No. SWR-2010-001, 11-16-2010)