What typical depth or characteristic is taken into account for site remediation assessment?

The mean annual precipitation is indeed a crucial factor in site remediation assessments because it directly influences the migration of contaminants in the soil and groundwater. High precipitation levels can increase the risk of water infiltration, leading to the leaching of pollutants and affecting the overall stability and health of the site. Understanding the mean annual precipitation helps assess how contaminants might disperse across the site and interact with environmental factors, guiding remediation strategies effectively.

In addition to this, the other aspects of site remediation, such as historical land use, soil texture, and type of surface cover, play their own roles but do not directly address the potential for contaminant movement in the same manner as precipitation. Historical land use indicates past activities that may have contributed to contamination, while soil texture affects drainage and contaminant retention. Surface cover can influence erosion and runoff but doesn't specifically address pollutant migration patterns like precipitation does. Hence, considering mean annual precipitation is essential for effective remediation planning.