"To allow drilling off the Atlantic Coast is to willfully forget Deepwater's awful lesson even as the economic, environmental and public health consequences continue to reverberate in communities along the gulf," O'Malley wrote. "If a disaster of Deepwater's scale occurred off the Chesapeake Bay, it would stretch from Richmond to Atlantic City. ... The 50-mile buffer the administration has proposed would be irrelevant. And unlike the gulf, the Chesapeake is a tidal estuary, meaning that oil would remain in the environment for decades."