§ 13.12.030. Prohibited discharges and limitations.

A.

General Prohibitions. An industrial user may not introduce into a POTW any pollutant(s) which cause Pass Through or Interference. These general prohibitions and the specific prohibitions in paragraph B. of this section apply to each industrial user introducing pollutants into a POTW whether or not the industrial user is subject to other Pretreatment Standards or Requirements.

B.

Specific Prohibitions. It shall be unlawful for any industrial user to discharge or deposit or cause or allow to be discharged or deposited into the wastewater treatment system of the City any wastewater which contains the following:

1.

Pollutants which create a fire or explosion hazard in the POTW. More specifically, no industrial user shall discharge any wastestream with a closed cup flashpoint of less than sixty (60) degrees Celsius (one hundred forty (140) degrees Fahrenheit) using the test methods specified in 40 CFR Section 261.21. The Director may require industrial users with the potential to discharge flammable, combustible or explosive substances to install and maintain an approved combustible gas detection meter or explosion hazard meter. No two (2) successive readings on an explosion hazard meter at the point of discharge shall be more than five (5) percent, nor any one (1) reading more than ten (10) percent, of the Lower Explosive Limit (LEL) of the meter.

2.

Pollutants which will cause corrosive structural damage to the POTW but in no case discharges with pH lower than pH 5.5.

3.

Solid or viscous substances which may cause obstruction in the sewage system or otherwise cause Interference to the POTW.

4.

Any pollutant, including oxygen demanding pollutants (BOD, etc.) released in a Discharge at a flow rate and/or pollutant concentration which will cause Pass Through or Interference with the POTW.

5.

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 forty (40) °C (one hundred four (104) °F) unless the Approval Authority, upon request of the POTW, approves alternate temperature limits.

6.

Stormwater drainage from ground resulting in Infiltration and Inflow (I&I) through the industrial user's service line(s), surface, roof drains, catch basins, unroofed area drains (e.g. commercial car washing facilities) or any other source unless otherwise approved by the Director. Specifically prohibited is the connection of roof downspouts, exterior foundation drains, areaway drains, or other sources of surface runoff or ground water to a building sewer or building drain which in turn is connected directly or indirectly to the City's wastewater collection system. No person shall connect or discharge water from underground drains, sump pump discharges, natural springs and seeps, water accumulated in excavation or grading or any other water associated with construction activities.

7.

A Slug Discharge as defined in Section 13.12.020 A.

8.

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

9.

Pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW in a quantity that may cause acute health and safety hazards for employees of the City employed at the POTW.

10.

Trucked or hauled pollutants except as authorized by the Director and only at discharge points designated by the Director.

11.

Any water or waste which contains grease or oil or any other substances that will solidify or become discernibly viscous at temperatures between thirty-two (32) degrees Fahrenheit (32° F. or 0° Celsius) and one hundred fifty (150) degrees Fahrenheit (150° F or 65.5° Celsius) and cause or contribute to Interference or Pass Through.

12.

Any pollutant directly into a manhole or other opening in the POTW unless specifically authorized by the City or as otherwise permitted under this Chapter. Prohibited is the opening of a manhole or discharging into any opening in violation of this Chapter.

13.

Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the City in compliance with applicable state or federal regulations.

14.

Liquid wastes from chemical toilets, and trailers, campers or other recreational vehicles which have been collected and/or held in tanks or other containers shall not be discharged into the POTW except at locations authorized by the City to collect such wastes.

C.

Specific Discharge Limitations. It shall be unlawful for any Significant Industrial User to discharge, deposit, cause, or allow to be discharged any waste or wastewater which fails to comply with the limitations imposed by this Section.

1.

Dilution is prohibited as a substitute for treatment and shall be a violation of this Chapter. Except where expressly authorized to do so by an applicable Pretreatment Standard or Requirement, no industrial user shall ever increase the use of process water, or in any other way attempt to dilute a discharge as a partial or complete substitute for adequate treatment to achieve compliance with a Pretreatment Standard or Requirement. The City may impose mass limitations on industrial users which are using dilution to meet applicable Pretreatment Standards or Requirements or in other cases where the imposition of mass limitations is appropriate.

2.

No Significant Industrial User shall discharge wastewater that exceeds the following limits:

MAXIMUM CONTRIBUTION

POLLUTANT	SYMBOL	Daily Maximum
Arsenic, Total	As	1.57 mg/l
Cadmium, Total	Cd	3.51 mg/l
Chromium, Total	Cr	5.92 mg/l
Chromium (III)	Cr (III)	0.57 mg/l
Chromium (VI)	Cr (VI)	0.04 mg/l
Copper, Total	Cu	5.37 lbs/day
Lead, Total	Pb	0.14 mg/l
Mercury, Total	Hg	0.02 mg/l
Nickel, Total	Ni	0.59 mg/l
Selenium, Total	Se	1.42 lbs/day
Silver, Total	Ag	0.62 mg/l
Zinc, Total	Zn	2.13 mg/l
Sulfide, Total		3608 mg/l

 

⁽¹⁾ The loading specified is the total loading for this pollutant that is available to all Significant Industrial Users. The City shall not allocate more pollutant loading through control mechanisms than is available for discharge as specified in this table.

3.

All industrial users subject to a Categorical Pretreatment Standard shall comply with all requirements of such Standard, and shall also comply with any limitations contained in this Chapter. Where the same pollutant is limited by more than one (1) Pretreatment Standard, the limitations which are more stringent shall prevail. Compliance with Categorical Pretreatment Standards shall be the timeframe specified in the applicable Categorical Pretreatment Standard.

4.

The City may establish more stringent pollutant limits, additional site-specific pollutant limits, Best Management Practices, or additional Pretreatment Requirements when, in the judgment of the City, such limitations are necessary to implement the provisions of this Chapter.

(Ord. 3144, 2016; Ord. 3082, § 1(Exh. A), 11-1-2011; Ord. 3050, § 1, 8-3-2010; Ord. 2645, 1993; Ord. 2386 Exh. A (part), 1985, § 13.20.020)