Overall Rating Silver
Overall Score 62.77
Liaison Lindsay Crum
Submission Date June 29, 2018
Executive Letter Download

STARS v2.1

Yale University
OP-2: Outdoor Air Quality

Status Score Responsible Party
Complete 1.00 / 1.00 Lindsay Toland
Metrics & Program Manager
Yale Office of Sustainability
"---" indicates that no data was submitted for this field

Does the institution have policies and/or guidelines in place to improve outdoor air quality and minimize air pollutant emissions from mobile sources on campus?:
Yes

A brief description of the policies and/or guidelines to improve outdoor air quality and minimize air pollutant emissions from mobile sources:

Yale does not have a comprehensive policy on idling, but state law prohibits idling longer than three minutes. 80% of Yale fleet vehicles (100% of those for Dining and Facilities, and the Shuttle vehicles) are equipped with GPS monitoring that sends alerts to managers when vehicles idle for more than three minutes. Managers also receive reports of idling activity over time to use in communications with drivers. Yale Hospitality includes an anti-idling clause in all external vendor contracts.


Has the institution completed an inventory of significant air emissions from stationary campus sources or else verified that no such emissions are produced?:
Yes

Weight of the following categories of air emissions from stationary sources::
Weight of Emissions
Nitrogen oxides (NOx) 14.80 Tons
Sulfur oxides (SOx) 4.40 Tons
Carbon monoxide (CO) 8.60 Tons
Particulate matter (PM) 7.10 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 10.90 Tons

A brief description of the methodology(ies) the institution used to complete its air emissions inventory:

The reported emissions of criteria air pollutants are calculated based upon using the best available method for each emission source and each pollutant. We have NOx CEMS (Continuous Emission Monitoring Systems) on 10 of our Powerplant units (4 Turbines, 3 Boilers and 3 Generators). CEMS are certified emissions measurement systems that have daily calibration tests and quarterly QA/QC requirements. For the other pollutants for the same Powerplant units we use fuel usage multiplied by an emission factor. We also have some Boilers that do not require CEMS so we use their fuel usage for NOx and the other pollutants. For the emission factors, if we have recent test data we will use that for the emission factors. If we do not have test data we use emission factors published in EPA AP-42 documents. For emergency generators we may not have fuel usage so we use runtime and multiply that by the maximum firing rate to get fuel usage. This may overstate fuel usage a bit, but these units run very little so this is acceptable. Then we use either manufacturer’s published emission test data or EPA AP-42.


The website URL where information about the programs or initiatives is available:
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Additional documentation to support the submission:
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Ozone, lead, hazardous air pollutants, and ozone-depleting compounds not available.

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 and complete the Data Inquiry Form.