Resolution authorizing the General Manager of the San Francisco Public Utilities Commission to execute Amendment No. 2 to Wastewater Enterprise Contract No. CS-235, Planning and Engineering Services, Southeast Plant (SEP) Biosolids Digester Facilities, with Brown and Caldwell, to increase the contract amount by $55,000,000 for a total not to exceed amount of $208,500,000 and increase the contract duration by three years and six months, for a total duration of 16 years from July 29, 2013, through July 28, 2029, pursuant to Charter, Section 9.118.