§ 6-327. DISCHARGE PROHIBITIONS.

(a)

General Prohibitions. No user shall introduce or cause to be introduced, directly or indirectly, to the POTW any pollutant or wastewater which will cause Pass Through or Interference. These general prohibitions apply to all users of the POTW whether or not the users are subject to categorical pretreatment standards or any other national, state or local pretreatment standards or requirements.

(b)

Specific Prohibitions. No user shall introduce or cause to be introduced into the POTW the following pollutants, substances, or wastewater:

(1)

Any 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 cause fire or explosion or be injurious in any other way to the POTW or to the operation of the POTW, including, but not limited to, wastestreams with a closed- cup flashpoint of less than 140° F or 60° C.

(2)

Any wastewater with a pH less than 6 or greater than 12.4, or having any corrosive or detrimental characteristic that may cause injury to wastewater treatment or maintenance personnel, or may cause damage to structures, equipment or other physical facilities of the regional sewer system.

(3)

Solid or viscous substances which may cause obstruction to the flow in the POTW resulting in Interference.

(4)

Any pollutants, including oxygen-demanding pollutants (e.g., BOD) released in a Discharge at a flow rate and/or pollutant concentration which will cause Interference to the POTW.

(5)

Any wastewater containing heat in amounts which will inhibit biological activity in the POTW resulting Interference, but in no case heat in such quantities that will cause the temperature at the treatment plant to exceed 104°F (40°C) unless the Approval Authority, upon request of the POTW, approves alternate temperature limits.

(6)

Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in amounts that will cause Interference or Pass Through.

(7)

Pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW in a quantity that may cause acute worker health and safety problems.

(8)

Any trucked or hauled pollutants except at discharge points designated by the POTW.

(9)

Any other industrial wastes, unless such wastes have first been passed through screens having openings not exceeding one-half inch in dimension; provided, however, that the Control Authority, by written permit, may authorize the discharge into the regional sewer system of such wastes if they are first passed through screens having larger openings, if the Control Authority is satisfied that such larger openings will provide screening efficiency and effectiveness equal to or better than that provided by the smaller openings.

(10)

Any wastewater containing toxic pollutants in sufficient quantity, either singly or by interaction with other pollutants, to injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, create a toxic effect in the receiving waters of the POTW, or exceed the limitation set forth in a categorical pretreatment standard. A toxic pollutant shall include, but not be limited to, any pollutant identified pursuant to Section 307(a) of the Act.

(11)

Any noxious or malodorous liquids, gases, or solids which either singly or by interaction with other wastes are sufficient to create a public nuisance or hazard to life or are sufficient to prevent entry into the sewers for maintenance and repair.

(12)

Any substance which may cause the POTW's effluent or any other product of the POTW, such as residues, sludges or scums, to be unsuitable for reclamation and reuse or to interfere with the reclamation process. In no case shall a substance discharged to the POTW cause the POTW to be in noncompliance with sludge use or disposal criteria, guidelines or regulations developed under Section 405 of the Act, any criteria, guidelines or regulations affecting sludge use or disposal developed pursuant to the Solid Waste Disposal Act, the Clean Air Act or the Toxic Substances Control Act, or state criteria applicable to the sludge management method being used.

(13)

Any substance which will cause the POTW to violate the Waste Discharge Requirements mandated by the state.

(14)

Any wastewater with objectionable color not removed in the treatment process.

(15)

Any wastewater containing radioactive material in sufficient quantity to interfere with any treatment process or constitute a hazard to humans or animals.

(16)

Any wastewater containing substances that may precipitate, solidify or become viscous at temperatures between 40°F (4.4°C) and 100°F (37.7°C)

(17)

Any recognizable portions of the human anatomy.

(18)

Any storm water, surface water, groundwater, roof runoff, or subsurface drainage which is acceptable to be discharged to other facilities where such facilities are available.

(19)

Any cooling water which is sufficiently clean to be discharged to some other suitable facility, such as a storm drain, where such facilities are available.

(20)

Any pool water, spa water, or pond water which is acceptable to be discharged to other facilities where such facilities are available.

(21)

Any malodorous substance such as hydrogen sulfide or any other substance which will cause offensive odors in the sewer system or at the treatment plant.

(22)

Any substance which is not amenable to treatment by the processes employed at the treatment plant.

(23)

Any substance which will cause corrosive structural damage to the POTW.

(24)

Any slug loading.

(25)

Any wastewater that comes into contact with any process utilizing tetrachloroethene.

(26)

Wastewater causing two successive readings on an explosion hazard meter at the point of discharge into the POTW, or at any point in the POTW, of more than five per cent (5%), or any single reading over ten per cent (10%) of the Lower Explosive Limit of the meter.

(c)

Compliance by existing sources with the Federal Categorical Pretreatment Standards shall be within three (3) years of the date the standard is promulgated unless a shorter compliance time is specified in the appropriate subpart of 40 C.F.R., Chapter 1, Subchapter N. Upon the promulgation of the Federal Categorical Pretreatment Standards for a particular industrial subcategory, the federal standard, if more stringent than limitations imposed under this article for sources in that subcategory, shall immediately supersede the limitations imposed under this article. The Director shall notify all affected users of the applicable reporting requirements under 40 C.F.R. § 403.12.

(d)

Local Limits. The following pollutant limits are established to protect against pass through and interference. No person shall discharge wastewater containing in excess of the following:

Parameter	Limit Daily Average	Unit
Arsenic	0.32	mg/L
Cadmium	0.12	mg/L
Chromium, Total	6.7	mg/L
Copper	2.5	mg/L
Cyanide, Total	0.77	mg/L
Lead	1.2	mg/L
Mercury	0.05	mg/L
Nickel	1.3	mg/L
Silver	1.1	mg/L
Zinc	2.1	mg/L
Phenolic Compounds	300	mg/L
Trichloroethene	0.12	mg/L
Tetrachloroethene	0.77	mg/L
BETX*	20	mg/L
Oil and Grease	700	mg/L

 

 

*Benzene, ethylbenzene, toluene, and xylene as a single constituent or as a cumulative total.

(e)

Application of Limits. The limits in Section 6-327(d) apply at the point where the wastewater is discharged to the POTW (also called "end of pipe"). All concentrations for metallic substances are for "total" metals unless indicated otherwise.

(f)

Equivalent Mass Limits. The Control Authority may impose mass limitations in addition to, or in place of, the concentration-based limitations listed in Section 6-327(d).

(g)

Contributions Causing Pass Through or Interference. When the Control Authority determines that a user is contributing to the POTW any of the specific prohibitions listed in Section 6-327(b) in such amounts as to cause pass through or interference, the Control Authority shall:

(1)

Advise the user(s) of the impact of the contribution on the POTW, and

(2)

Develop effluent limitation(s) for such user(s) to correct the interference with the POTW.

(h)

Best Management Practices. The Control Authority may develop Best Management Practices (BMPs) to implement the general prohibitions, specific prohibitions, and local limits listed in this section.

(Orig. Ord. 3642 and 4279; Am. Ord. 6940, 1967; Am. Ord. 71-105, 1972; Am. Ord. 76-33, § 3, eff. 5-9-76; Am. Ord. 83-41, § 5, eff. 7-1-83; Am. Ord. 91-14, §§ 6, 7, eff. 3-15-91; Am. Ord. 92-5, §§ 11, 12, eff. 2-21-92; Am. Ord. 98-91, §§ 15—17, 1-1-99; Am. Ord. 2002-73, § 16, eff. 1-23-02; Am. Ord. 2008-33, §§ 4, 14, eff. 6-22-08).