Overall Rating Silver
Overall Score 54.05
Liaison Tony Gillund
Submission Date March 23, 2023

STARS v2.2

Purdue University
OP-1: Emissions Inventory and Disclosure

Status Score Responsible Party
Complete 1.42 / 3.00 Tony Gillund
Director of Sustainability
Campus Planning, Architecture and Sustainability
"---" indicates that no data was submitted for this field

Has the institution conducted a GHG emissions inventory within the previous three years that includes all Scope 1 and 2 emissions? :
Yes

A copy of the most recent GHG emissions inventory:
A brief description of the methodology and/or tool used to complete the GHG emissions inventory:
Purdue’s utilities are utilized on campus in three primary forms: electricity, chilled water and steam. Around 50% of the university’s electricity need is supplied by the university owned and operated combined heat and power (CHP) plant, and the other 50% is from grid purchased electricity. 100% of chilled water is produced by the university’s owned facilities. Around 60% of the steam demand is supplied by the Purdue CHP plant, and the other 40% is purchased from Duke Energy’s onsite CHP facility. For Scope 1 emissions, the university is required to submit greenhouse gas emissions reports to the EPA as a compliance activity under 40 CFR Part 98 of the Clean Air Act. These emissions are Tier 1, and include the university boilers, the purchased steam from the duct burner on the Duke’s CHP facility, and numerous small accounts across campus using natural gas, propane, and diesel fuel. The university boilers have Continuous Emissions Monitoring Systems that gathers the vast majority of the university’s Scope 1 emissions. The remaining Scope 1 emissions are calculated inhouse and reported to the EPA for review. For scope 2 emissions, Purdue uses an Emission Factor calculation to determine the associated emissions for purchased electricity. Emission factors are used from the EPA website for the Indiana Electricity Profile.

Has the GHG emissions inventory been validated internally by personnel who are independent of the GHG accounting and reporting process and/or verified by an independent, external third party?:
No

A brief description of the GHG inventory verification process:
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Documentation to support the GHG inventory verification process:
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Gross Scope 1 GHG emissions, performance year:
Weight in MTCO2e
Stationary combustion 364,235 Metric tons of CO2 equivalent
Other sources (mobile combustion, process emissions, fugitive emissions) 0 Metric tons of CO2 equivalent

Total gross Scope 1 GHG emissions, performance year:
364,235 Metric tons of CO2 equivalent

Gross Scope 2 GHG emissions, performance year (market-based):
Weight in MTCO2e
Imported electricity 151,604 Metric tons of CO2 equivalent
Imported thermal energy 0 Metric tons of CO2 equivalent

Total gross Scope 2 GHG emissions, performance year:
151,604 Metric tons of CO2 equivalent

Gross GHG emissions from biogenic sources, performance year:
0 Metric tons of CO2 equivalent

Does the GHG emissions inventory include Scope 3 emissions from the following sources?:
Yes or No Weight in MTCO2e
Business travel No ---
Commuting No ---
Purchased goods and services No ---
Capital goods No ---
Fuel- and energy-related activities not included in Scope 1 or Scope 2 No ---
Waste generated in operations No ---
Other sources No ---

Total Scope 3 GHG emissions, performance year:
0 Metric tons of CO2 equivalent

A brief description of how the institution accounted for its Scope 3 emissions:
Purdue University does not currently track Scope 3 emissions

Has the institution completed an inventory within the previous three years to quantify its air pollutant emissions?:
Yes

Annual weight of emissions for::
Weight of Emissions
Nitrogen oxides (NOx) 270 Tons
Sulfur oxides (SOx) 216 Tons
Carbon monoxide (CO) 0 Tons
Particulate matter (PM) 0 Tons
Ozone (O3) 0 Tons
Lead (Pb) 0 Tons
Hazardous air pollutants (HAPs) 0 Tons
Ozone-depleting compounds (ODCs) 0 Tons
Other standard categories of air emissions identified in permits and/or regulations 0 Tons

Do the air pollutant emissions figures provided include the following sources?:
Yes or No
Major stationary sources Yes
Area sources No
Mobile sources No
Commuting No
Off-site electricity production No

A brief description of the methodology(ies) the institution used to complete its air emissions inventory:
At Purdue’s combined heat and power plant, NOx and SO2 data is collected from 40 CFR Part 60/75 certified emissions monitoring systems.

Gross Scope 2 GHG emissions from purchased electricity (location-based):
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Gross Scope 2 GHG emissions from imported thermal energy (location-based) :
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Website URL where information about the institution’s emissions inventories is available:
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Additional documentation to support the submission:
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Data source(s) and notes about the submission:
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The information presented here is self-reported. While AASHE staff review portions of all STARS reports and institutions are welcome to seek additional forms of review, the data in STARS reports are not verified by AASHE. If you believe any of this information is erroneous or inconsistent with credit criteria, please review the process for inquiring about the information reported by an institution or simply email your inquiry to stars@aashe.org.