Dear Editor, In his Chronicle ad (May 4, p.21), the incumbent mayor [Lee Leffingwell] again makes his false claim that he "Expanded the SOS ordinance to help clean up sites polluting" the Barton Springs/Edwards Aquifer. In its article “Loosening of SOS proposed," Aug. 9, 2007, p.B1, the Statesman accurately reported that Leffingwell's proposal was to “encourage more redevelopment over the ecologically fragile" watershed by removing strict impervious cover limits on redevelopment projects. The final Leffingwell-backed amendment also allowed massive redevelopment on top of caves and sinkholes, straddling steep slopes, and within stream water quality buffer zones. Voters should know the truth: Leffingwell’s SOS loosener served developers, not Barton Springs protection.