| Description: | This document provides a suggested framework and recommendations for the statistical analysis of groundwater monitoring data at RCRA facility units subject to 40 CFR Parts 264 and 265 and 40 CFR Part 258 to determine whether groundwater has been impacted by a hazardous constituent release. Specific statistical methods are identified in the RCRA regulations, but their application is not described in any detail. The Unified Guidance provides examples and background information that will aid in successfully conducting the required statistical analyses. This latest version of Statistical Analysis of Groundwater Monitoring Data at RCRA Facilities is termed the Unified Guidance, since it integrates and supersedes two guidance documents of the same title released in 1989 and 1992. |
