No person shall discharge, directly or indirectly, into the POTW, wastewater containing any of the following substances in concentrations exceeding those specified below on either a daily or an instantaneous basis, except by permit or as provided for in §
120-62. Concentration limits are applicable to wastewater effluents at the point just prior to discharge into the POTW ("end of pipe" concentrations).
Substance
|
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Aluminum
|
Antimony
|
Arsenic
|
Barium
|
Beryllium
|
Bismuth
|
Bromine
|
Cadmium
|
Chlorides
|
Chlorine
|
Chromium (hex)
|
Chromium (tot)
|
Cobalt
|
Copper
|
Cyanide (complex)
|
Cyanide (free)
|
Fluorides
|
Gold
|
Iodine
|
Iron
|
Lead
|
Manganese
|
Mercury
|
Molybdenum
|
Nickel
|
Phenols, total
|
Selenium
|
Silver
|
Sulfates
|
Sulfides
|
Tin
|
Titanium
|
Vanadium
|
Zinc
|
A. Except for chromium (hex), all concentrations listed
for metallic substances shall be as "total metal," which shall be defined
as the value measured in a sample acidified to a pH value of 2 or less, without
prior filtration.
B. As determined on a composite sample taken from the user's
daily discharge over a typical operational and/or production day.
C. As determined on a grab sample taken from the user's
discharge at any time during the daily operational and/or production period.
D. Other substances which may be limited are:
(2) Chemical compounds which, upon acidification, alkalinization,
oxidation or reduction, in the discharge or after admixture with wastewater
and its components in the POTW produce toxic, flammable, or explosive compounds.
(3) Pesticides, including algaecides, fungicides, herbicides,
insecticides, rodenticides.
(4) Polyaromatic hydrocarbons.
(5) Viable pathogenic organisms from industrial processes
or hospital procedures.
Except where expressly authorized to do so by an applicable pretreatment
standard, no 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.
Dilution flow shall be considered to be inflow.
Grease, oil, and sand interceptors shall be provided, when, in the opinion
of the Superintendent, they are necessary for the proper handling of wastewater
containing excessive amounts of grease, flammable substances, sand, or other
harmful substances; except that such interceptors shall not be required for
private living quarters or living units. All interceptors shall be of type
and capacity approved by the Superintendent and shall be so located to be
easily accessible for cleaning and inspection. Such interceptors shall be
inspected, cleaned, and repaired regularly, as needed, by the owner, at his
expense.