Overall Rating Gold
Overall Score 66.35
Liaison Trevor Ledbetter
Submission Date May 2, 2017
Executive Letter Download

STARS v2.1

University of Arizona
OP-1: Greenhouse Gas Emissions

Status Score Responsible Party
Complete 4.74 / 10.00 Benjamin Champion
Director
Office of Sustainability
"---" indicates that no data was submitted for this field

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

Does the institution’s GHG emissions inventory include all, some or none of its Scope 3 GHG emissions from the following categories?:
All, Some, or None
Business travel Some
Commuting All
Purchased goods and services None
Capital goods None
Waste generated in operations All
Fuel- and energy-related activities not included in Scope 1 or Scope 2 None
Other categories Some

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, including how the institution accounted for each category of Scope 3 emissions reported above:

The UA determined it's boundary using an operational control approach. Emissions data and estimates were provided to the consultant by UA Staff, and the consultant used the CA-CP calculator to develop the inventory and deliver a final report. For some sources (e.g., commuting), consultants were provided with CO2-e values.


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?:
Yes

A brief description of the internal and/or external verification process:

As described in the description of the methodology, the data was provided to a certified third party consultant. Results were internally reviewed for accuracy and questions raised if there were issues.


Documentation to support the internal and/or external verification process:
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Does the institution wish to pursue Part 2 and Part 3 of this credit? (reductions in Scope 1 and Scope 2 GHG emissions):
Yes

Gross Scope 1 and Scope 2 GHG emissions:
Performance Year Baseline Year
Gross Scope 1 GHG emissions from stationary combustion 77,576 Metric Tons of CO2 Equivalent 67,994 Metric Tons of CO2 Equivalent
Gross Scope 1 GHG emissions from other sources 2,935 Metric Tons of CO2 Equivalent 2,554 Metric Tons of CO2 Equivalent
Gross Scope 2 GHG emissions from purchased electricity 92,837 Metric Tons of CO2 Equivalent 105,114 Metric Tons of CO2 Equivalent
Gross Scope 2 GHG emissions from other sources 0 Metric Tons of CO2 Equivalent 0 Metric Tons of CO2 Equivalent
Total 173,348 Metric Tons of CO2 Equivalent 175,662 Metric Tons of CO2 Equivalent

Start and end dates of the performance year and baseline year (or three-year periods):
Start Date End Date
Performance Year July 1, 2014 June 30, 2015
Baseline Year July 1, 2008 June 30, 2009

A brief description of when and why the GHG emissions baseline was adopted (e.g. in sustainability plans and policies or in the context of other reporting obligations):

The GHG emissions baseline represents the first year UA completed a full GHG inventory. So this is our baseline year for comparison to subsequent GHG inventories.


Figures needed to determine total carbon offsets:
Performance Year Baseline Year
Third-party verified carbon offsets purchased (exclude purchased RECs/GOs) 0 Metric Tons of CO2 Equivalent 0 Metric Tons of CO2 Equivalent
Institution-catalyzed carbon offsets generated 84.73 Metric Tons of CO2 Equivalent 0 Metric Tons of CO2 Equivalent
Carbon sequestration due to land that the institution manages specifically for sequestration 116 Metric Tons of CO2 Equivalent 166 Metric Tons of CO2 Equivalent
Carbon storage from on-site composting 0 Metric Tons of CO2 Equivalent 0 Metric Tons of CO2 Equivalent
Carbon offsets included above for which the emissions reductions have been sold or transferred by the institution 0 Metric Tons of CO2 Equivalent 0 Metric Tons of CO2 Equivalent
Net carbon offsets 200.73 Metric Tons of CO2 Equivalent 166 Metric Tons of CO2 Equivalent

A brief description of the offsets in each category reported above, including vendor, project source, verification program and contract timeframes (as applicable):

The institution-catalyzed carbon offsets are a result of the UA Compost Cats program. A professor of life-cycle analysis has led a team of students in developing a robust life-cycle analysis comparison of the Compost Cats operation and logistics process compared with sending the same waste to a landfill. This is the result of that analysis.

The carbon sequestration due to land managed specifically for sequestration is the result of the UA campus arboretum practices in managing the overall campus grounds for health and vitality of the arboretum species, and their attendant carbon sequestration.


Emissions reductions attributable to Renewable Energy Certificate (REC) or Guarantee of Origin (GO) purchases:
Performance Year Baseline Year
Emissions reductions attributable to REC/GO purchases 0 Metric Tons of CO2 Equivalent 0 Metric Tons of CO2 Equivalent

A brief description of the purchased RECs/GOs including vendor, project source and verification program:
---

Adjusted net Scope 1 and 2 GHG emissions:
Performance Year Baseline Year
Adjusted net Scope 1 and 2 GHG emissions 173,147.27 Metric Tons of CO2 Equivalent 175,496 Metric Tons of CO2 Equivalent

Figures needed to determine “Weighted Campus Users”:
Performance Year Baseline Year
Number of students resident on-site 6,789 6,084
Number of employees resident on-site 28 25
Number of other individuals resident on-site and/or staffed hospital beds 487 0
Total full-time equivalent student enrollment 41,631 35,743
Full-time equivalent of employees (staff + faculty) 12,479 11,842
Full-time equivalent of students enrolled exclusively in distance education 1,074 3,468
Weighted campus users 41,968.25 34,615

Adjusted net Scope 1 and 2 GHG emissions per weighted campus user:
Performance Year Baseline Year
Adjusted net Scope 1 and 2 GHG emissions per weighted campus user 4.13 Metric Tons of CO2 Equivalent 5.07 Metric Tons of CO2 Equivalent

Percentage reduction in adjusted net Scope 1 and Scope 2 GHG emissions per weighted campus user from baseline:
18.62

Gross floor area of building space, performance year:
14,721,402 Gross Square Feet

Floor area of energy intensive building space, performance year:
Floor Area
Laboratory space 1,262,028 Square Feet
Healthcare space 807,972 Square Feet
Other energy intensive space 0 Square Feet

EUI-adjusted floor area, performance year:
18,861,402 Gross Square Feet

Adjusted net Scope 1 and 2 GHG emissions per unit of EUI-adjusted floor area, performance year:
0.01 MtCO2e / GSF

Scope 3 GHG emissions, performance year:
Emissions
Business travel 18,113 Metric Tons of CO2 Equivalent
Commuting 23,540 Metric Tons of CO2 Equivalent
Purchased goods and services 941 Metric Tons of CO2 Equivalent
Capital goods ---
Fuel- and energy-related activities not included in Scope 1 or Scope 2 ---
Waste generated in operations 10,683 Metric Tons of CO2 Equivalent
Other categories 6,115 Metric Tons of CO2 Equivalent

A brief description of the institution’s GHG emissions reduction initiatives, including efforts made during the previous three years:

Three new automatic boilers were installed at the CHRP plant to handle variations in steam load. The boilers automatically start and stop and vary production, which minimizes the need to keep a larger boiler on low fire to handle load variations. The new boilers handle load variation more efficiently in terms of steam output versus gas consumption, and respond more quickly to demand fluctuations to maintain more consistent distribution system temperature and pressure.

A systematic re-insulation of steam lines, valves, and other system appurtenances over the past 3 years has significantly decreased thermal losses in buildings and in the distribution system. Identification of missing or deficient insulation was one result of an extensive survey of campus utility tunnels to support creation of a Utility-tunnel BIM model.

Two utility-tunnel runs were refurbished or reconstructed to replace deteriorated structure; another run was replaced with direct-bury, highly insulated utility lines. The deteriorated tunnels were endangering exisitng utilties, which were replaced with new, better-insultated supply lines.

The HVAC systems in about 9 buildings have been upgraded in the past three years to replace older, less efficient equipment, address control issues, better match equipment with current building needs, and increase reliability.

The remaining 4,160-volt distribution circuits on campus were replaced with 13.8-kilovolt circuits. At the higher voltage, line losses are lower due to lower current.

An ongoing cooling/heating plant energy management system project is centralizing controls on the three plants, which will allow more effective monitoring, equipment dispatch and optimization of total plant operation. The new system will automate many of the decisions as to what equipment is started and stopped and operational parameters to ensure best use of purchased electricity and natural gas. By allowing tighter control of system tuning, distributed steam and chilled-water temperatures, and pressures will allow more efficient operation of building HVAC systems.

Un-Islanding of 4.5MW Turbine: The AHSC turbine, a 4.5MW combined cycle unit, was previously islanded to specific equipment located within the refrigeration plant. This precluded the turbine from consistently being able to produce power and steam at maximum output and realize the full benefit of this cogeneration system. The turbine was recently un-islanded and now exports power to the campus electrical grid. This modification in operations now allows the turbine to operate at full power and steam output. With this change, a corresponding decrease in campus greenhouse gas emissions should result. The University’s use of the natural gas turbine in lieu of the local electrical utility, which predominately utilizes coal based production units,is one more step towards reducing the campus carbon footprint.


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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All numbers for emissions and weighted campus users have been updated to FY15 data.

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.