- ©2000. AAPG/DEG
Monitored natural attenuation (MNA) is an attractive remedy for petroleum-contaminated sites. However, to use MNA as a partial or total site remedy, the remedial manager must first present unequivocal evidence that natural attenuation will occur at the site and will meet public and regulatory concerns. A considerable body of scientific evidence of natural attenuation exists, as does a small library of American Society for Testing and Materials and U.S. Environmental Protection Agency documentation on use of MNA. This article clearly and succinctly presents the background of MNA, guides the new remedial manager through the process, discusses the pros and cons of MNA alone and in combination with other low-cost remedies (primarily source removal), and outlines regulatory and public concerns and how to meet them.
Key Words: intrinsic remediation, monitored natural attenuation, passive bioremediation.
Mr. DaVee is a supervisory geologist within the Hazardous, Toxic, and Radiological Waste Design Center of the Tulsa District, U. S. Army Corps of Engineers. He currently leads a multidisciplinary department engaged in developing and implementing environmental restoration and compliance solutions for federal/governmental clients. He is a licensed professional geologist. Mr. DaVee obtained B.S. and M.S. degrees in Geology from the University of Tulsa, Tulsa, Oklahoma and an M.S. in Environmental Engineering from Oklahoma State University.
Dr. Sanders is a faculty member in the School of Civil and Environmental Engineering, Oklahoma State University, Stillwater, Oklahoma. Prior to joining the OSU faculty, she worked extensively in the area of hazardous waste site investigation and remediation, including 12 years with the U. S. Air Force. She received her B.S. in civil engineering from the University of Missouri; M.S. from Oklahoma State University in bioenvironmental engineering; and Ph.D. in civil engineering from the University of Texas.