Zinc  Production
-      United States
Proposed Rule: Mandatory Reporting of Greenhouse Gases                         ^aimrriental Prot9ction

Under the proposed Mandatory Reporting of Greenhouse Gases (GHGs) rule, owners or
operators of facilities that contain zinc production processes (as defined below) and that emit
25,000 metric tons of GHGs per year or more (expressed as carbon dioxide equivalents) from
stationary combustion, miscellaneous use of carbonates, and all other source categories (see
information sheet on General Provisions) would report emissions from all source categories
located at the facility for which emission calculation 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, zinc production facilities consist of zinc smelters and secondary zinc recycling

What GHGs Would Be  Reported?

The proposal calls for each zinc production facility to report carbon dioxide (CO2) process emissions
from all Waelz kilns and electrothermic furnaces used for zinc production.

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
methane (CH4) emissions from each stationary combustion unit on site by following the requirements of
40 CFRpart 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?

Under the proposal, facilities would calculate CO2 process emissions using one of two methods, as
       Facilities 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 facilities, the use of CEMS would be
       Facilities without CEMS would calculate the process CO2 emissions by determining on a monthly
       basis the total mass of carbon-containing materials (i.e., zinc-bearing material, flux, electrodes,
       any other materials) introduced into each kiln and furnace and the carbon content of each
       material. Carbon content would be determined monthly by either direct measurement or using
       information provided by the material supplier.

What Information Would Be Reported?

In addition to the information required by the General Provisions at 40 CFR 98.3(c), the proposal calls for
each annual report to include the following information:
March 2009                                   1                              EPA-430-F-09-037

       Annual CO2 emissions from each Waelz kiln and electrothermic furnace (metric tons) and the
       method used to estimate these emissions.
       Total number of Waelz kilns and electrothermic furnaces at the facility.
       Annual facility zinc product production capacity (metric tons).
       Number of facility operating hours in calendar year.
       If CO2 emissions are estimated using carbon input rather than a CEMS, report for each carbon-
       containing input material consumed or used (other than fuel):
           o  Annual material quantity.
           o  Annual average of the monthly carbon content determinations for each material.
           o  Method used for the determination.

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-09-037