A. List Of Allowable Concentrations Of Certain Wastes: The public works administrator shall from time to time prepare a list of allowable quantities or concentrations of certain constituents in industrial wastewater flows and shall issue directions for meeting the requirements of this section.
B. Scope And Compliance: No person shall introduce wastewater in the sewer system or POTW that exceeds local limits which have been developed by the treatment system NPDES permit holder. Said local limits shall not apply where more restrictive limitations are imposed by permit or NCPS limitations. Except as provided above, dischargers tributary to the Hyperion POTW operated by the city of Los Angeles shall comply with the following local limits:
Constituent
|
Value Units
|
Existing Sources
|
Constituent
|
Value Units
|
Existing Sources
|
Arsenic | mg/l | 3 |
Cadmium | mg/l | 15 |
Chromium - total | mg/l | 10 |
Copper | mg/l | 15 |
Lead | mg/l | 5 |
Mercury | mg/l | Essentially none |
Nickel | mg/l | 12 |
Zinc | mg/l | 25 |
Silver | mg/l | 5 |
Cyanide - total | mg/l | 10 |
Cyanide - free | mg/l | 2 |
Oil and grease - total | ||
Dispersed | mg/l | 600 |
Floatable | mg/l | None visible |
Phenol | mg/l | * |
Chlorinated hydrocarbons | mg/l | Essentially none |
Selenium | mg/l | * |
Dissolved sulfides | mg/l | 0.1 |
pH ranges | 5.5-11 | |
Temperatures | 140°F | |
* Values for phenol and selenium and other constituents not shown, such as fluoride, boron, aluminum, iron, tin, cobalt, etc., have been established for general application. They are not critical constituents at this time for existing sources. The board of public works of the city of Los Angeles will impose such limits as it may find necessary to ensure compliance with treatment plant discharge limits and more restrictive pretreatment standards for new sources prescribed by the environmental protection agency (EPA).
The above limitations shall not apply where more restrictive limitations are imposed by permit or national categorical pretreatment standards.
1. In addition to the concentration limits for heavy metals and toxicants in this subsection B of this section, the discharge shall also comply with the maximum allowable daily mass emission rate and the maximum allowable monthly mass emission rates.
C. Concentration Limits And Prohibitions: The total daily mass emission rate for effluent concentrations that are defined by this section shall be limited by the following:
1. The daily mass emission rate for each constituent shall be calculated from the total waste flow occurring in each specific day, and the maximum concentration limit. The mass emission rate of the discharge during any twenty four (24) hour period shall not exceed the product of the proposed daily average discharge in million gallons per day, maximum concentration limit, and a constant 8.34.
2. The monthly mass emission rate for each constituent shall be calculated from the total waste flow occurring in each specific month, and the average concentration limit or the maximum concentration limit, if average concentration limit is not prescribed. The mass emission rate of discharge during any month shall not exceed the product of proposed monthly average discharge in million gallons per month, average concentration limit, or the maximum concentration limit, if average concentration limit is not prescribed, and a constant 8.34.
3. The pH of wastes discharged shall at all times be within the range of 5.5 to 11. No person shall discharge acids or alkaline materials to the public sewers until the pH has been controlled to a level not less than 5.5 nor higher than 11.0. No discharge shall have any corrosive or detrimental characteristics that may cause injury to wastewater treatment, inspection or maintenance personnel or may cause damage to structures, equipment or other physical facilities of the public sewer system.
4. The temperature of the wastes discharged shall not exceed one hundred forty degrees Fahrenheit (140°F) nor shall the temperature exceed one hundred four degrees Fahrenheit (104°F) at the point of entry into the POTW treatment facility.
5. Radioactivity in the effluent shall not exceed the limits specified in ordinance 17, chapter 5, subchapter 4, group 3, article 5, section 30287, of the California Code of Regulations.
6. Discharge of the following wastes into public sewer system is prohibited:
a. Any solids or viscous substances of such size or in such quantity that may cause obstruction to the flow in the sewer or be detrimental to proper wastewater treatment plant operations. These objectionable substances include, but are not limited to, asphalt, dead animals, offal, ashes, sand, mud, straw, industrial process shavings, metal, glass, rags, feathers, plastics, wood, whole blood, bones, hair, coffee grounds, egg shells, seafood shells, fleshings, entrails, paper dishes, paper cups, milk containers, grease or fats, or other similar paper products either whole or ground.
b. Any pollutant released in a discharge at a flow rate and/or pollutant concentration which will cause interference with the POTW.
c. Any nonbiodegradable cutting oil, commonly called soluble oil, which forms persistent water emulsions.
d. Any wastes with excessively high BOD, COD or decomposable organic contents.
e. Any strongly odorous waste or waste which can create odors in receiving waters of sewerage system.
f. Any excessive amounts of organic phosphorous type compounds.
g. Any excessive amounts of deionized water, steam condensate or distilled water.
h. Any waste containing substances that may precipitate, solidify or become viscous at temperatures between fifty degrees Fahrenheit (50°F) and one hundred forty degrees Fahrenheit (140°F).
i. Any waste producing excessive discoloration of wastewater or treatment plant effluent.
j. Any blow down or bleed off water from cooling towers or other evaporation coolers exceeding one-third (1/3) of the makeup water.
k. Any single pass cooling water.
l. Pollutants which 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 degrees Fahrenheit (140°F) or sixty degrees centigrade (60°C) using the test methods specified in 40 CFR 261.21.
m. Any rainwater, storm water, ground water, street drainage, surface drainage, roof drainage, yard drainage, water from the yard fountains, swimming pools or lawn sprays, or any other uncontaminated water.
7. The discharge of any radiological, chemical, or biological warfare agent or radiological waste is prohibited.
D. Compliance With Standards: The discharger shall comply with applicable toxic and pretreatment standards promulgated in accordance with sections 307 and 308 of the federal water pollution control act, or amendments thereto. The discharger shall submit periodic notices (over intervals not to exceed 3 months) of progress toward compliance with applicable toxic and pretreatment standards developed pursuant to the federal water pollution control act, or amendments thereto.
E. National Categorical Pretreatment Standards (NCPS): Upon promulgation of mandatory NCPS for any industrial subcategory, the NCPS, if more restrictive than limitations imposed by this section, shall apply. The public works administrator may impose a phased compliance schedule to ensure that affected industries meet the NCPS. Failure to meet the phased compliance schedule may result in permit suspension or revocation. Those dischargers subject to NCPS shall comply with all reporting requirements in accordance with the general pretreatment regulations for existing and new sources of pollution (title 40, code of federal regulations, part 403).
F. Prohibited Material Disposal: All wastes which are prohibited from being discharged into public sewers, including, but not limited to, chemical solutions, acids, caustic wastes, solvents, oil and grease, screenings, sludges, and other solids removed from liquid wastes, etc., shall be held in impervious containers and disposed of at a legal point of disposal, and in accordance with the provisions of division 7.5 of the California Water Code. For the purpose of this requirement, a "legal point of disposal" is defined as one for which waste discharge requirements have been prescribed by a regional water quality control board, and which is in full compliance therewith.
G. Off Site Disposal; Reporting: The discharger shall submit a hazardous waste manifest, as required by the public works administrator, by the fifteenth day of the month following the reporting period. A statement to that effect shall be submitted to the public works administrator.
H. New Standard Enforcement: If a toxic effluent standard or prohibition (including any schedule of compliance specified in such effluent standard or prohibition) is established under section 307(a) of the federal water pollution control act, or amendments thereto, for a toxic pollutant which is present in the discharge authorized by the permit, and such standard or pollutant in the permit, the public works administrator shall revise or modify the permit in accordance with such toxic effluent standard or prohibition, and so notify the discharger. Compliance with the new standard or prohibition shall be in accordance with the prescribed timetables stated in such regulation or within a reasonable time as determined by the public works administrator.
I. Dilution Prohibited: No person shall discharge or cause to be discharged any water or other substance added for the purpose of diluting any industrial waste to achieve compliance with limitations imposed by the provision of this section. (1962 Code §§ 5-6.01 et seq., 6-1.301 - 6-1.304; amd. Ord. 05-O-2478, eff. 8-5-2005)