There is authorized to be appropriated to carry out this section $8,500,000. 16__. Delta Diablo high purity water treatment facility (a) Authorization The Secretary, in cooperation with the Delta Diablo, California, is authorized to participate in the design, planning, and construction of recycled water system facilities. (b) Cost share The Federal share of the cost of the project authorized by this section shall not exceed 25 percent of the total cost of the project. (c) Limitation The Secretary shall not provide funds for the operation and maintenance of the project authorized by this section. (d) Authorization of appropriations There is authorized to be appropriated to carry out this section $12,500,000. 16__. Dublin and San Ramon recycled water expansion project (a) Authorization The Secretary, in cooperation with the Dublin San Ramon Services District and the Dublin San Ramon Services District/East Bay Municipal Utility District Recycled Water Authority (DERWA), California, is authorized to participate in the design, planning, and construction of recycled water system facilities. (b) Cost share The Federal share of the cost of the project authorized by this section shall not exceed 25 percent of the total cost of the project. (c) Limitation The Secretary shall not provide funds for the operation and maintenance of the project authorized by this section. (d) Authorization of appropriations There is authorized to be appropriated to carry out this section $6,300,000. 16__. Hayward recycled water project (a) Authorization The Secretary, in cooperation with the City of Hayward, California, is authorized to participate in the design, planning, and construction of recycled water system facilities. (b) Cost share The Federal share of the cost of the project authorized by this section shall not exceed 25 percent of the total cost of the project. (c) Limitation The Secretary shall not provide funds for the operation and maintenance of the project authorized by this section. (d) Authorization of appropriations There