This Directive provides guidance to EPA staff, the public, and the regulated community on how EPA intends to exercise its discretion in implementing national policy on the use of Monitored Natural Attenuation for the remediation of contaminated soil and groundwater at sites regulated under EPA programs.

• The Use of Soil Amendments for Remediation, Revitalization, and Reuse (PDF)(59 pp, 2 MB, 2007, 542-R-07-013)