A groundwater basin monitoring contract between the Metropolitan Water District of Southern California and GeoPentech, Inc., to monitor the Domenigoni Basin has been approved. The $160,000 contract was authorized as part of a May 9 MWD board vote. GeoPentech, which is headquartered in Irvine, will monitor the basin west of Diamond Valley Lake. Water first flowed into Diamond Valley Lake in 1999. MWD approved the project, including an Environmental Impact Report, in 1991. The EIR identified a need to mitigate groundwater flows after the reservoir’s construction, and MWD currently mitigates downstream impacts with engineered seepage from Diamond Valley Lake and from the San Diego Canal.