Control Charts are a tool to monitor ongoing sampling. If samples are collected in the sample place with the same sampling method, the data collected may be monitored for trends and outlier data points. Continuous monitoring can provide insight into long term trends whose gradual change may go unnoticed without statistical analysis that control charting provides. Control charting can provide peace of mind when an outlier data point occurs and it can forewarn of potential problems creeping into monitored sampling sites. SVL?s LIMS software is capable of creating control charts for samples, however, the laboratory does not have access to all of the information that the sampler has available (especially variations at the sample site).