Magnesium Production Facilities
Monitoring Checklist	

Greenhouse Gas Reporting Program

What Must Be Monitored by Each Magnesium Production Facility that Meets the
Requirements of §98.200 and §98.201?

xvEPA

United States
Environmental Protection
Agency

Each magnesium production facility must monitor the following information:

~

~

~

~

Type of magnesium production
process (e.g., primary, secondary,
die casting).

Average cover gas flow rate
(standard cubic feet per minute).

Overall cover gas usage rate for the
facility (kg of GHG/metric ton of
magnesium).

New melt protection technologies
adopted during the reporting year that
account for changes in emissions from
the previous year.

Amount of magnesium produced or

~	processed over the reporting period
for each process type (metric tons).

Composition of the cover/carrier

~	gas during the reporting period
(percent by volume).

For missing data, the length of time
data are missing, the method used to

~	estimate cover and carrier gas usage,
and the quantity of emissions
estimated for the missing data period.

Changes in facility cover gas usage
rate greater than 30 percent

~	compared to the prior year. If
applicable, facilities must provide
an explanation.

Magnesium Production Facilities Monitoring Checklist
Greenhouse Gas Reporting Program

Page 1 of 2

40 CFR part 98, subpart T
February 2018


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Each magnesium production facility must monitor the following parameters
based on the gas consumption tracking method used:

Inventory Method (Eqn. T-l)

Inventory of each cover gas or carrier
gas stored in cylinders or other
~ containers at the beginning of the year, ~
including residual gas amounts (heels),
in kg.

Inventory of each cover gas or carrier
gas stored in cylinders or other
containers at the end of the year,
including heels, in kg.

Acquisitions of each cover gas or
~ carrier gas during the year through

purchases or other transactions, in kg.

Disbursements of each cover gas or
carrier gas to sources and locations
outside the facility through sales or
|—I other transactions during the year,
including heels in cylinders or other
containers returned by the magnesium
production or processing facility to the
gas supplier, including heels, in kg.

Cylinder Tracking Method (Eqn. T-2, T-3)

Mass of each container s contents	,, „ , . , A A ,

i—i /, s • r.A,	i—i Mass or each container s contents (kg)

~ (kg) at the beginning of the	~ ^ . , ,, , ^ . . /

' ¦ ¦ 7	at the end or the container-use period,
container-use period.

Mass Flow Controller Method

Mass of each cover gas or carrier
^ gas measured using a mass flow
controller during the period of
use.

See also the information sheet for Magnesium Production at
https://www.epa.gov/ghgreporting/subpart-t-information-sheet

This document is provided solely for informational purposes. It does not provide legal advice,
have legally binding effect, or expressly or implicitly create, expand, or limit any legal rights,
obligations, responsibilities, expectations, or benefits in regard to any person. This information
is intended to assist reporting facilities owners in understanding key provisions of the
Greenhouse Gas Reporting Program.

Magnesium Production Facilities Monitoring Checklist
Greenhouse Gas Reporting Program

Page 2 of 2

40 CFR part 98, subpart T
February 2018


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