SAVANNAH — The state Environmental Protection Division will no longer require developers to keep a 25-foot construction buffer from the edge of some coastal salt marshes, and the decision has Georgia conservation groups in an uproar. Judson Turner, the agency's director, issued a memo Tuesday saying waterfront homes and other developments built next to a marsh will have to maintain a buffer only if there's evidence on the banks of "wrested" vegetation — plants and grasses that have been flattened or twisted by flowing water. He cited language in Georgia's Erosion and Sedimentation Act.