40 CFR Part 63, Subpart IIIII, Table 6 to Subpart IIIII of Part 63 - Examples of Techniques for Equipment Problem Identification, Leak Detection and Mercury Vapor

Status message

There are 2 Updates appearing in the Federal Register for 40 CFR 63. View below or at eCFR (GPOAccess)
View PDF at GPO Pt. 63, Subpt. IIIII, Table 6
Table 6 to Subpart IIIII of Part 63—Examples of Techniques for Equipment Problem Identification, Leak Detection and Mercury Vapor
As stated in Tables 1 and 2 of Subpart IIIII, examples of techniques for equipment problem identification, leak detection and mercury vapor measurements can be found in the following table:
To detect . . . You could use . . . Principle of detection . . .
1. Leaking vent hoses; liquid mercury that is not covered by an aqueous liquid in open-top containers or end boxes; end box covers or stoppers, amalgam seal pot stoppers, or caustic basket covers not securely in place; cracks or spalling in cell room floors, pillars, or beams; caustic leaks; liquid mercury accumulations or spills; and equipment that is leaking liquid mercury Visual inspections
2. Equipment that is leaking hydrogen and/or mercury vapor during inspections required by Table 2 to this subpart a. Auditory and visual inspections
b. Portable mercury vapor analyzer—ultraviolet light absorption detector A sample of gas is drawn through a detection cell where ultraviolet light at 253.7 nanometers (nm) is directed perpendicularly through the sample toward a photodetector. Elemental mercury absorbs the incident light in proportion to its concentration in the air stream.
c. Portable mercury vapor analyzer—gold film amalgamation detector A sample of gas is drawn through a detection cell containing a gold film detector. Elemental mercury amalgamates with the gold film, changing the resistance of the detector in proportion to the mercury concentration in the air sample.
d. Portable short-wave ultraviolet light, fluorescent background—visual indication Ultraviolet light is directed toward a fluorescent background positioned behind a suspected source of mercury emissions. Elemental mercury vapor absorbs the ultraviolet light, projecting a dark shadow image on the fluorescent background.
e. Portable combustible gas meter
3. Level of mercury vapor in the cell room and other areas a. Portable mercury vapor analyzer—ultraviolet light absorption detector See Item 2.b.
b. Portable mercury vapor analyzer—gold film amalgamation detector See Item 2.c.
c. Permanganate impingement A known volume of gas sample is absorbed in potassium permanganate solution. Elemental mercury in the solution is determined using a cold vapor adsorption analyzer, and the concentration of mercury in the gas sample is calculated.

Title 40 published on 2014-07-01

The following are only the Rules published in the Federal Register after the published date of Title 40.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2014-08-15; vol. 79 # 158 - Friday, August 15, 2014
    1. 79 FR 48072 - NESHAP for Reciprocating Internal Combustion Engines; NSPS for Stationary Internal Combustion Engines
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Notice of final decision on reconsideration.
      Effective August 15, 2014. Any petitions for review of the letters announcing the EPA's decision not to propose changes to the regulations in response to the public comments received on the three issues under reconsideration described in this Notice must be filed in the U.S. Court of Appeals for the District of Columbia Circuit by October 14, 2014.
      40 CFR Parts 60 and 63

This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.

This list is taken from the Parallel Table of Authorities and Rules provided by GPO [Government Printing Office].

It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.


United States Code

Title 40 published on 2014-07-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 40 CFR 63 after this date.

  • 2014-08-15; vol. 79 # 158 - Friday, August 15, 2014
    1. 79 FR 48072 - NESHAP for Reciprocating Internal Combustion Engines; NSPS for Stationary Internal Combustion Engines
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Notice of final decision on reconsideration.
      Effective August 15, 2014. Any petitions for review of the letters announcing the EPA's decision not to propose changes to the regulations in response to the public comments received on the three issues under reconsideration described in this Notice must be filed in the U.S. Court of Appeals for the District of Columbia Circuit by October 14, 2014.
      40 CFR Parts 60 and 63