In 2008, GeoSierra Environmental purchased the assets of GeoSierra, Inc., a leader and innovator in the field of trenchless PRB construction for 15 years prior. As with it's predecessor, GeoSierra Environmental installs PRB walls throughout the United States for Fortune 500 Clients, National Consulting Firms, and Government Entities. Since it's inception, the firm not only installs conventional iron filings PRBs but has also expanded it's capabilities to use it's trenchless techniques to install permeabiliy enhancement media via hydraulic fracturing techniques, installation of oxidants and reductants, as well as LNAPL recovery wells that have the ability to capture orders of magnitude more product per well bore.