H.Amdt.28 - Amendment authorizes tribal governments to be eligible for technical and management assistance for small publicly-owned sewerage agencies; amends an existing Clean Water Act authority for the Environmental Protection Agency (EPA) to carry out pilot projects by ensuring that certain "green technology" activities are eligible for controlling stormwater runoff and increases the authorization of appropriations for this authority to $100 million for each of fiscal years 2010 through 2014; clarifies eligibility for construction of energy-efficient or renewable-energy generation technologies at publicly-owned sewerage agencies under the Clean Water State Revolving Fund; provides additional criteria for States to determine "affordability criteria" for waste-water infrastructure projects and activities, including factors related to per capita income and local unemployment rates; provides additional transparency and accountability for expenditures from the Clean Water State Revolving Fund by req