Regional Water Quality Board Approves Modified Permit to Hasten End to Mirant’s Polluting Cooling System July 13, 2015May 10, 2006 by S.F. City Attorney's Press Office Regional Water Quality Board Approves Modified Permit to Hasten End to Mirant’s Polluting Cooling System City Officials & Community Leaders Call Decision Requiring End to Destructive Cooling Process by 2008 as “Major Step in the Right Direction”