Record Display for the EPA National Library Catalog
RECORD NUMBER: 105 OF 265
|OLS Field Name||OLS Field Data|
|Main Title||Establishing Background Levels.|
|CORP Author||Environmental Protection Agency, Washington, DC. Office of Emergency and Remedial Response.|
|Report Number||EPA/540/F-94/030 ;OSWER-9285.7-19FS;|
|Additional Subjects||Background ; Pollution sampling ; Site characterization ; Superfund ; Land pollution ; Water pollution ; Environmental pollution ; Hazardous materials ; Ecological concentration ; Level(Quantity) ; Environmental transport ; Path of pollutants ; Remediation ; Hazard Ranking System ; National Priorities List ; Supefund Accelerated Cleanup Model|
EPA uses the Hazard Ranking System (HRS) (40 CFR Part 300, App. A) to evaluate Superfund sites to be proposed on the National Priorities List (NPL). Based on the HRS, an observed release or observed contamination is established when contaminants that are significantly above background levels have migrated away from a site through environmental media. This fact sheet describes how to determine background levels for each migration pathway, and emphasizes the necessity of strategic, efficient sampling, which is particularly important in light of conducting integrated assessments under the Superfund Accelerated Cleanup Model (SACM).