| depth of the biologically active zone in upland habitats at the hanford site, washington: implications for remediation and ecological risk management. | soil invertebrates, mammals, and plants penetrate and exploit the surface soil layer (i.e., the biologically active zone) to varying depths. as the us department of energy remediates radioactive and hazardous wastes in soil at the hanford site, a site-specific definition of the biologically active zone is needed to identify the depth to which remedial actions should be taken to protect the environment and avoid excessive cleanup expenditures. this definition may then be considered in developing ... | 2015 | 25209119 |