§ 27-146. Prohibitions and limitations on discharges into the sanitary sewerage system.

(a)

Policy statement.

(1)

The sanitary sewerage system exists to provide for the collection of polluted wastewater from public and private property and its treatment through normal sewage treatment practices. It is in the public interest that reasonable rules and regulations be applied to discharges into the sanitary sewerage systems to prevent the system from being unnecessarily or excessively burdened, and to ensure that effluent from the sanitary sewerage system will comply with all applicable federal and state environmental laws and regulations.

(2)

Proper operation of the sanitary sewerage system requires, among other things, the prohibition of any discharge components which would not be compatible with, or which would be harmful to or would interfere with the system. Proper operation of the system also requires that the system not be burdened with storm water runoff and similar wastewater which should be discharged through the storm drainage system. Safe operation of the system also requires that discharges of toxic substances and other harmful materials into the system be prohibited.

(b)

General prohibitions and limitations. No person shall cause or permit any discharge into the sanitary sewerage system containing any pollutant or other material of such character or quality that will:

(1)

Not be susceptible to or compatible with treatment by the system, or interfere with or damage the system or its efficient operation thereof;

(2)

Constitute a hazard to human life, or to the stream or watercourse receiving the effluent;

(3)

Violate any pretreatment standard or effluent limitation as defined herein;

(4)

Cause the system to violate any applicable LPDES permit or any applicable water quality standard;

(5)

Violate any of the specific prohibitions or limitations established by subsection (c) of this section;

(6)

Cause pass through at the POTW.

(c)

Specific prohibitions and limitations. No person shall cause or permit any discharge into the sanitary sewerage system which at the point of connection to the system contains any of the following:

(1)

Unpolluted water. Any unpolluted water, including but not limited to storm water, surface water, groundwater, roof runoff, subsurface drainage, or nonchemically treated cooling water. These waters shall be discharged into the storm drainage system, as they would constitute an unnecessary burden upon the sanitary sewerage system.

(2)

Fats, oil or grease.

a.

Edible fat, oil or grease, at a concentration of more than one hundred seventy-five (175) mg/l whether emulsified or not.

b.

Deposit fats, oil, or grease in the sewer lines in such a manner as to clog the sewers or impede the flow;

c.

Petroleum oil, non-biodegradable cutting oil, or products of mineral oil origin in amounts that will cause interference or pass through or at a concentration of more than one hundred (100) mg/l.

(3)

Explosive mixtures. Liquids, solids or gases which by reason of their nature or quantity are, or may be, sufficient either alone or by interaction with other substances to create a fire or explosion hazard in the POTW, including but not limited to wastestreams with a closed cup flashpoint of less than one hundred forty (140) degrees Fahrenheit or sixty (60) degrees Centigrade using the test methods specified in 40 CFR 261.21. At no time shall two (2) successive readings on a U.S. Bureau of Mines approved explosion hazard meter, at the point of discharge into the sewer system, be more than five (5) percent nor any single reading over ten (10) percent of the lower explosive limit of the meter.

(4)

Noxious material. Noxious or malodorous solids, liquids or gases, which, either singly or by interaction with other wastes, are capable of creating a public nuisance or hazard to human life, or are or may be sufficient to prevent entry into a sewer for its maintenance and repair. In no event shall any waste be discharged in such concentrations as to affect the taste and odor of the receiving stream after passage through the sewage treatment process.

(5)

Color. Wastes causing discoloration not readily removable by the normal sewage treatment process.

(6)

Improperly shredded garbage. Garbage that has not been ground or comminuted to such a degree that all particles will be carried freely in suspension under flow conditions normally prevailing in the public sewers, with no particle greater than one-fourth (¼) inch in any dimension.

(7)

Radioactive wastes. Radioactive wastes or isotopes of such half-life or concentrations that they do not comply with regulations or orders issued by the appropriate authority having control over their use or which exceed the standards of the Louisiana Department of Environmental Quality, Nuclear Energy Division, or which will or may cause damage or hazards to the system, to personnel operating the system, or to receiving waters or the animal life therein.

(8)

Solid or viscous wastes. Solid or viscous wastes which obstruct the flow in a sewer, or otherwise interfere with the proper operation of the sanitary sewerage system.

(9)

Excessive discharge rate. Any waters or wastes with unusual volume of flow or concentration of wastes ("slugs").

(10)

Toxic substances. Pollutants which result in the presence of toxic gases, vapors, or fumes in the POTW in a quantity that may cause acute worker health and safety problems. Any toxic and/or poisonous substance in sufficient quantity to interfere with the efficiency of the sewage treatment process.

(11)

Incompatible or corrosive wastes.

a.

Any incompatible pollutants or any substance which may cause corrosion or deterioration of the treatment system, but in no case discharge with pH lower than 5.0.

b.

Substances in such concentrations as to adversely affect the effluent of the system such that the effluent fails to meet the requirements of applicable federal and state laws and regulations or the requirements of any applicable LPDES permit.

c.

Nothing in this paragraph (11) shall be construed to prohibit discharge of components of domestic waste in amounts which are normal for residential discharges of domestic waste and insignificant in relation to their effect upon the effluent of the system.

(12)

pH. A pH of less than five (5.0) or greater than ten (10.0).

(13)

Temperature. Heat in amounts which will inhibit biological activity in the POTW resulting in interference, but in no case heat in such quantities that the temperature at the POTW treatment plant exceeds one hundred four (104) degrees Fahrenheit (forty (40) degrees Centigrade).

(14)

Suspended solids. Total suspended solids (TSS) at a concentration greater than eight thousand five hundred (8,500) mg/l. In those instances where TSS concentrations rise to such levels as to present an unacceptable burden to the receiving sewerage treatment plant, the director may establish a TSS limitation as deemed necessary to protect the operational integrity of the receiving sewerage treatment plant. An "unacceptable burden" is TSS at such concentrations entering the sewerage treatment plant that the plant is unable to meet any provision of its LPDES permit, or would constitute a hazard to human life or to the receiving waterbody.

(15)

Biochemical oxygen demand. Biochemical oxygen demand (BOD) at a concentration greater than eight thousand (8,000) mg/l. In those instances where BOD concentrations rise to such levels as to present an unacceptable burden to the receiving sewerage treatment plant, the director may establish a BOD limitation as deemed necessary to protect the operational integrity of the receiving sewerage treatment plant. An "unacceptable burden" is BOD at such concentrations entering the sewerage treatment plant that the plant is unable to meet any provision of its LPDES permit, or would constitute a hazard to human life or to the receiving waterbody.

(16)

Chemical oxygen demand. Chemical oxygen demand (COD) at a concentration greater than eleven thousand five hundred (11,500) mg/l. In those instances where COD concentrations rise to such levels as to present an unacceptable burden to the receiving sewerage treatment plant, the director may establish a COD limitation as deemed necessary to protect the operational integrity of the receiving sewerage treatment plant. An "unacceptable burden" is COD at such concentrations entering the sewerage treatment plant that the plant is unable to meet any provision of its LPDES permit, or would constitute a hazard to human life or to the receiving waterbody.

(17)

Heavy metals. Any of the following elements at concentrations greater than those indicated opposite the element:

Element	mg/l
Total Arsenic	2.00
Total Cadmium	0.24
Total Chromium	1.26
Total Copper	8.5
Total Lead	1.40
Total Mercury	0.06
Total Nickel	8.0
Total Selenium	0.19
Total Silver	1.46
Total Zinc	3.00

 

(18)

Other elements and substances.

a.

Cyanides or cyanogens compounds capable of liberating hydrocyanic acid gas on acidification in excess of one and ninety hundredths (1.90) mg/l CN in the discharged waters of wastes.

b.

Total phenol in excess of three hundred eighty (380) mg/l in the wastewater.

c.

Any other agent, material, element or thing, which either alone, or by combination or interaction with other substances, will be harmful to the system, or to human, animal or aquatic life or to the receiving waters.

(19)

Trucked or hauled wastes, except at discharge points designated by the parish with possession of a permit and parish personnel present.

(d)

Pretreatment. A discharger shall be required to construct adequate pretreatment facilities if such facilities are necessary to achieve compliance by the parish with effluent limitations specified in the LPDES permit issued to the sewage treatment plant that receives wastewaters from said dischargers. In any case where pretreatment is required or is used to meet the requirements of this section with respect to a particular discharge, the pretreatment methods and system used shall comply with section 27-147 and must be approved by the director in the permit issued to the discharger pursuant to section 27-148.

(e), (f) [ Reserved. ]

(Ord. No. 18587, § 5, 9-2-92; Ord. No. 19235, 11-16-94; Ord. No. 21559, 4-24-02; Ord. No. 22046, 11-5-03; Ord. No. 24196, § 3, 1-25-11)