Team Pennsylvania Foundation and the Department of Environmental Protection recently announced a collaboration to create a searchable inventory of Brownfields properties across Pennsylvania. There are currently 133 properties listed on the site.
Obviously, the goal here is to redevelop these abandoned sites. But with what money in this economy? DEP's website contains a list of support and funding programs. For example, the Department of Community and Economic Development offers the Industrial Site Reuse Program provides environmental site assessment and remediation funding in the form of low interest loans to private developers and businesses. DEP also offers a Brownfield Assessment/Remediation Grant, which, not surprisingly, is dependent upon available funding.
There are sources of funding out there. It may not be easy to find, but you won't know if it is available until you ask.