Good luck getting California’s diverse special interest groups to agree on anything. But if South San Joaquin Irrigation District General Manager Jeff Shields is right, a unique consortium of farmers, environmentalists, sportsmen and private property crusaders might have something to celebrate together. While Shields was standing before the San Joaquin County Local Agency Formation Commission last week to discuss the merits of an independent study the district commissioned addressing the viability of taking over PG&E’s existing power distribution system to lower rates 15 percent across the board in Manteca, Ripon, and Lathrop.