Solid waste at Colby is collected every week. Each year, Colby produces about 0.34 tons of trash per community member (faculty, staff, and students).
This study compiled and analyzed 15 years of institutional emissions data obtained from the business office, physical plant department records, and outside contractors to assess the impact that Colby College has on global climate change. This audit incorporates the following emissions sectors:
kWh purchased each year
Emissions factor was adjusted during months of the green electricity contract.
On-campus stationary sources
Residual (#5-6) and Distillate Oils (#1-4) bought to power the steam plant that heats the buildings
Divided into co-generation and non-cogeneration use, based on whether the oil was used to produce electricity in our co-generation plant
Propane purchased to heat construction projects
Gallons of gasoline and diesel used by the campus vehicle fleet
Estimates, based on a survey, of faculty, staff, and off-campus student commuting miles
Tons of waste collected on campus, based on current amount of waste per building and adjusted to the buildings that were present each year
Landfilled waste, no methane recovery.
From reports of refrigerants replaced
Carbon dioxide equivalence factor found for each refrigerant
Using software from Clean Air Cool Planet, we converted use and consumption figures for each sector into carbon dioxide equivalencies for each of the six anthropogenic greenhouse gasses.