United Stadsa
Environmental Protection
Agency

Electrical Transmission and Distribution
Equipment Use

Final Rule: Subpart DD, Mandatory Reporting of Greenhouse Gases

What Must Be Monitored for Users of Electrical Transmission and Distribution Equipment
Insulated with Sulfur Hexafluoride (SFr) and/or Perfluorocarbons (PFCs) ?

Measure or estimate these parameters annually

For use in measuring SF6 emissions using the mass-balance monitoring method (for measuring
PFCs, "PFCs" should be substituted for "SF6" in the parameters below):	

~	SF6 stored in containers, but not in
energized equipment, at the
beginning of the year (pounds)

~	SF6 stored in containers, but not in
energized equipment, at the end of
the year (pounds)

~	SF6 purchased in bulk from
chemical producers or distributors
(pounds)

~	SF6 purchased from equipment
manufacturers or distributors with or
inside equipment, including
hermetically sealed-pressure
equipment (pounds)

~	SF6 returned to facility after off-site
recycling (pounds)

Supplementary information required for data reporting requirements

~	SF6 in bulk and contained in equipment that
is sold to other entities (pounds)

~	SF6 returned to suppliers (pounds)

~	SF6 sent off-site for recycling (pounds)

~	SF6 sent off-site for destruction (pounds)

~	Nameplate capacity of new equipment,
including hermetically sealed-pressure
switchgear (pounds)

~	Nameplate capacity of retiring equipment,
including hermetically sealed-pressure
switchgear (pounds)

~ Total nameplate capacity (pounds)
of equipment containing SF6 or
PFCs existing at the beginning of
the year (excluding hermetically
sealed-pressure equipment)

~	Transmission miles (length of lines
carrying voltages above 35 kV)

~	Distribution miles (length of lines carrying
voltages at or below 35 kV)

For more information, see the information sheet for Electrical Transmission and Distribution Equipment
Use at: http://epa.gov/climatcchangc/cmissions/ghg infosheets.html.

Electrical Transmission and Distribution Equipment Use Monitoring Checklist
Mandatory Reporting of Greenhouse Gases

November 2010

Page 1 of 1

-------