A former landfill site in Fort Collins, Colorado is being assessed for landfill gas emissions as part of an effort under the city's Brownfields program to support reuse options for the property. Before initiating any additional development at the property, the city requested assistance from the EPA Region 8 Office, and the Office of Superfund Remediation and Technology Innovation, Technology Integration and Information Branch to perform a site assessment to search for the presence of any fugitive gas emissions from the former landfill site. This assessment was necessary due to the potential adverse health effects associated with exposure to landfill gas. The focus of this study was to evaluate fugitive emissions of methane and VOCs at the site, in support of the reuse objectives, using a scanning open-path Fourier transform infrared spectrometer, open-path tunable diode laser absorption spectroscopy, and an ultra-violet differential optical absorption spectrometer.