Environmental projects typically involve the remediation of contaminants in heterogeneous site conditions, such as various geological settings. Also, contaminant-specific physical and chemical properties will affect contaminant behavior in heterogeneous site conditions. Statistics is a tool used to address various issues in a specific environmental project. There are two types of statistical methods: parametric and nonparametric. The levels or concentrations of contaminant at an environmental site will be reported either through field instrument or fixed laboratory analysis. The background concentration can be defined as the concentration of a chemical that is not influenced by the releases from a site and is usually described as naturally occurring and/or anthropogenic. Nonparametric trend analyses and parametric trend analyses are routinely used to evaluate trends in concentrations of contaminants over time to confirm the conceptual site model or to evaluate the progress of remediation. Geospatial analysis is the process of compiling and analyzing data related in time or space.