This  document was  developed for the Proposed Mandatory  GHG Reporting Rule.
For  the final document, please visit the  final Mandatory Reporting of
Greenhouse  Gases Rule.
Silicon Carbide Production
-      United Slates
Proposed Rule: Mandatory Reporting of Greenhouse Gases                         Environmental Protection


Under the proposed Mandatory Reporting of Greenhouse Gases (GHGs) rule, owners or
operators of facilities that contain silicon carbide production (as defined below) would report
emissions from silicon carbide production processes and all other source categories located at
the facility for which methods are defined in the rule. Owners or operators would collect
emission data; calculate GHG emissions; and follow the specified procedures for quality
assurance, missing data, recordkeeping, and reporting.

How Is This Source Category Defined?

Under the proposal, the silicon carbide production source category consists of any process that produces
silicon carbide for abrasive purposes.

What GHGs Would Be Reported?

The proposal calls for silicon carbide production facilities to report carbon dioxide (CO2) and methane
      process emissions from all silicon carbide production processes at the facility combined.
In addition, each facility would report GHG emissions for other source categories for which calculation
methods are provided in the rule. For example, facilities would report CO2, nitrous oxide (N2O), and CFLt
emissions from each stationary combustion unit on site by following the requirements of 40 CFR part 98,
subpart C (General Stationary Fuel Combustion Sources). Please refer to the relevant information sheet
for a summary of the proposal for calculating and reporting emissions from any other source categories at
the facility.

How Would  GHG Emissions Be Calculated?

For CO2 emissions, the proposal calls for facilities to use one of two methods, as appropriate:
   •   Silicon carbide production units with certain types of continuous emissions monitors (CEMS) in
       place would report using the CEMS and follow the methodology of 40 CFR part 98, subpart C to
       report total CO2 emissions from calcination and fuel combustion. At other silicon carbide
       production units, the use of CEMS would be optional.
   •   Facilities without CEMS would calculate CO2 emissions using the measured petroleum coke
       consumption and a quarterly facility-specific emission factor. The facility-specific emission
       factor is the carbon content of the petroleum coke (provided by the supplier or measured quarterly
       by an offsite laboratory) adjusted for carbon in the silicon carbide product.

For CFI4 emissions, the owner or operator would use the measured petroleum coke consumption and a
default emission  factor of 10.2 kilograms (kg) per metric ton of coke consumed.

What Information Would Be Reported?
March 2009                                   1                             EPA-430-F-09-040

-------
This  document  was developed for the  Proposed Mandatory GHG Reporting  Rule.
For  the  final  document, please  visit the  final  Mandatory  Reporting of
Greenhouse Gases Rule.

In addition to the information required by the General Provisions at 40 CFR 98.3(c), the proposal calls for
each silicon carbide production facility to report the following information:
    •   Annual CO2 and QrU emissions from all silicon carbide production processes at the facility
       combined.
    •   Annual silicon carbine production capacity.
    •   Annual silicon carbide production.
    •   Annual operating hours.
    •   Quarterly facility-specific emission factors.

Facilities that use CEMS would also report the data specified in 40 CFR 98.34(d) of subpart C (General
Stationary Fuel Combustion Sources).

For More Information

This series of information sheets is intended to assist reporting facilities/owners in understanding key
provisions of the proposed rule. However, these information sheets are not intended to be a substitution
for the rule. Visit EPA's Web site (www.epa.gov/climatechange/emissions/ghgrulemaking.html) for more
information, including the proposed preamble and rule and additional information sheets on specific
industries, or go to  to access the rulemaking docket (EPA-HQ OAR-2008-0508).
For questions that cannot be answered through the Web site or docket, call 1-877-GHG-l 188.
March 2009                                     2                              EPA-430-F-09-040

-------