(See also How long does it take for seed to grow). Depending on the conditions, you can expect to see some grass seed mixtures germinate quite quickly. If conditions at the time of sowing are perfect, you may see germination is as little as 2-4 days.
Source: http://ipl.unm.edu/cwl/fedbook/fwpca.html Overview. The Federal Water Pollution Control Act, popularly known as the Clean Water Act, is a comprehensive statute aimed at restoring and maintaining the chemical, physical and biological integrity of the nation's waters.
The official text of the CWA is available in the United States Code on FDSys, from the US Government Printing Office The Federal Water Pollution Control Act of 1948 was the first major U.S. law to address water pollution. As amended in 1972, the law became commonly known as the Clean Water Act (CWA). The 1972 amendments: Established the basic structure for regulating pollutant discharges into the waters of the United States.