Bioremediation is an engineered technology that modifies environmental conditions (physical, chemical, biochemical, or microbiological) to encourage microorganisms to destroy or detoxify organic and inorganic contaminants in the environment. The process can be applied above ground in land farms, tanks, biopiles, or other treatment systems (referred to as
ex situ) or below ground in the soil or groundwater, referred to as in situ. In situ bioremediation of groundwater has become one of the most widely used technologies for contaminated site treatment because of its relatively low cost, adaptability to site
specific conditions, and efficacy when properly implemented

• Introduction to In Situ Bioremediation of Groundwater (PDF)(86 pp, 2 MB, 2013, 542-R-13-008)