How extensive and harmful is the contamination of the Garber-Wellington aquifer?
What about future water use? Contamination of the Garber-Wellington Aquifer has occurred on the installation. However,most of the contamination is confined to the shallow groundwater (< 150 feet) on the installation. The private wells in communities immediately northeast of Tinker are also contaminated. Theextent and severity of the contamination, as well as all its potential sources (which may includeoff-base sources of contamination as well as on-base sources), have not been fully characterized. To ensure no future impact on drinking water sources, Tinker has installed a series of monitoringwells. Tinker has 66 monitoring wells in the northeast quadrant of the base that are sampled onan annual basis. These wells have been sampled annually since 1992. Twelve well clusters (36wells) have been installed under the existing off-base investigation. These new wells are in thevicinity of off-base private wells. Samples from these additional wells will be representative ofgroundwater contamin
