Doesn’t the wastewater return to the aquifer that it is pumped from?
As noted by the 2008 Twin Lakes Groundwater/Surface Water Interaction Study (3), soil boring of West Twin Lake reveals sand to a depth of 26 ft, followed by a 4 ft thick layer of clayey sand. The rate of seepage through this restrictive clay layer is slow relative to an expected seepage rate from the lake, suggesting that groundwater seepage from the lakes is in a predominately lateral direction. The monitoring results imply that lateral flow of the local groundwater aquifer is primarily from east to west and follows the same tendency of the regional groundwater aquifer as shown in the USGS Hydrological Investigations Atlas.
The Village of Roberts two municipal wells are cased to 188 feet and 155 feet and are 302 feeta and 304 feet deep. It is unlikely the municipal wells would capture the water flowing into the groundwater from the west end of West Twin Lake given the depths of the well, the high transmissivity of the aquifer and the distance between the wells and the portion of West Twin that recharges the aquifer (1).