The nation's approach to assessing, cleaning up, and reusing brownfields has evolved dramatically since the emergence of EPA and state brownfields programs. The cleanup and subsequent redevelopment of brownfields have had significant positive impacts on their surrounding communities, including enhancing local economies, increasing property values, generating new jobs, and creating new commercial, residential, and recreational space on sites once viewed as liabilities. While there are countless success stories of brownfields that were transformed into new assets, brownfields with petroleum contamination present unique challenges. Typically small and widely dispersed throughout communities, abandoned gas stations and other petroleum-impacted properties often require tailored approaches to overcome the economic and environmental conditions that limit their cleanup and subsequent revitalization. Although there are an estimated 200,000 brownfields across the U.S. with petroleum contamination issues, it has only been within the last six years that these properties were considered eligible to address under EPA's Brownfields program.