It’s about taking water and not about fish. South San Joaquin Irrigation District General Manager Peter Rietkerk made it clear that is the district’s view of the State Water Board move to mandate unimpaired flows of 40 percent on the Stanislaus, Merced, and Tuolumne rivers between February and June. Rietkerk spoke before the Ripon Rotary Club at its Wednesday noon meeting at Spring Creek Country Club.