The first of five evening study sessions hosted by the San Joaquin County Board of Supervisors was well attended Thursday night, and Supervisor Kathy Miller considered the meeting a success.Thursday’s work session focused on a variety of water issues facing the county, including the status of the Bay Conservation Delta Plan and the Sustainable Groundwater Management Act, as well as the status of litigation against the Metropolitan Water District of Southern California over its acquisition of Delta wetlands properties, among other topics.