Constituting the Eleventh Supplemental Ordinance to the General Gas Works Revenue Bond Ordinance of 1998 (the "1998 General Ordinance"); authorizing the City of Philadelphia (the "City") to sell, either at public or private sale, Gas Works Revenue Bonds, Tenth Series (the "Tenth Series Bonds") to pay the cost of refunding or redeeming certain outstanding Gas Works Revenue Bonds, any termination payment which may become due under a Qualified Swap Agreement in connection with the redemption or conversion of all or any portion of certain Gas Works Revenue Bonds and other Project Costs; authorizin — Open Common Ground