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Table of Contents
Metal Finishing Point Source Category
(40CFR433.10 -- 40CFR433.17)
The following is a summary of the referenced federal rules, as published
in the Code of Federal Regulations (CFR). This information is provided
as an aide to help understand the requirements of the federal regulations,
as they pertain to specific industrial or manufacturing operations. This information is not provided nor intended to act as a substitute for
legal or other professional services. CFR citation numbers for each
subpart are indicated, while the full text of the CFR citations can be
viewed by clicking HERE and following the
directions.
Applicability; description of the metal finishing point source
category (40CFR433.10)
The metal finishing point source category includes facilities that
perform electroplating, electroless plating, anodizing and coating. Wastewater discharges from several facility operations and processes are
covered under this regulation, including cleaning, sand blasting, solvent
degreasing, paint stripping, painting, electrostatic painting, and electrocoating
and many others. Effluent limitations and standards for the coil
coating industry (40CFR465) are regulated
as a separate source category.
Specialized Definitions (40CFR433.11)
Total toxic organics (TTO) refers to the summation of all quantifiable
values of designated toxic organics in the wastewater discharge and includes,
but is not limited to, trichloroethane, methylene chloride, naphthalene,
phenol, and toluene.
Monitoring requirements (40CFR433.12)
Discusses the discharge monitoring requirements for this point source
category. In lieu of monitoring for TTO, a discharger may be permitted
to claim an exemption from these requirements by certifying that no dumping
of concentrated toxic organics into the wastewaters has occurred since
filing of the last discharge monitoring report. If monitoring is
necessary to assess compliance with the total toxic organics (TTO) standard,
analysis for only those pollutants that would be reasonably expected to
be present in the discharge is required.
Effluent limitations representing the degree of effluent reduction
attainable by applying the best practicable control technology (BPT) currently
available (40CFR433.13)
Existing dischargers must meet both daily maximum and monthly average
effluent concentrations, that are based on the best practicable control
technology (BPT) currently available, for the following constituents: total toxic organics (TTO), oils & grease, total suspended solids (TSS),
and pH, and several metals.
Effluent limitations representing the degree of effluent
reduction attainable by applying the best available technology (BAT) economically
achievable (40CFR433.14)
Existing dischargers must meet both daily maximum and monthly average
effluent concentrations, that are based on the best available technology
economically achievable (BAT), for the following constituents: total
toxic organics (TTO), cyanide, cadmium, chromium, copper, lead, nickel,
silver, and zinc.
Pretreatment standards for existing sources (PSES) (40CFR433.15)
Existing dischargers to a POTW must meet both daily maximum and monthly
average effluent concentrations for the following constituents: cadmium,
chromium, copper, lead, nickel, silver, zinc, cyanide, and total toxic
organics (TTO).
New source performance standards (NSPS) (40CFR433.16)
New point source discharges must meet more stringent daily maximum
and monthly average effluent concentrations by using the best practicable
control technology (BPT) currently available for the following constituents: cadmium, chromium, copper, lead, nickel, silver, zinc, cyanide, total toxic
organics (TTO), oils & grease, and pH.
Pretreatment standards for new sources (PSNS) (40CFR433.17)
New dischargers to a POTW must meet both daily maximum and maximum
monthly average effluent concentrations for the following constituents; cadmium, chromium, copper, lead, nickel, silver, zinc, cyanide, and total
toxic organics (TTO).
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