Related to Flood of one hundred (100) year frequency:

Semi-annual (2/Year) sampling frequency means the sampling shall be done during the months of June and December, unless specifically identified otherwise.
100-year flood means a flood that has a 1-percent or greater chance of recurring in any given year or a flood of a magnitude equaled or exceeded once in 100 years on the average over a significantly long period.
Yearly (1/Year) sampling frequency means the sampling shall be done in the month of September, unless specifically identified otherwise in the effluent limitations and monitoring requirements table.
One-hundred-year flood means a flood having a one per cent chance of being equaled or exceeded in any given year.
COVID-19 hazard means exposure to potentially infectious material that may contain SARS-CoV-2, the virus that causes COVID-19. Potentially infectious materials include airborne droplets, small particle aerosols, and airborne droplet nuclei, which most commonly result from a person or persons exhaling, talking or vocalizing, coughing, sneezing, or procedures performed on persons which may aerosolize saliva or respiratory tract fluids, among other things. This also includes objects or surfaces that may be contaminated with SARS-CoV-2.

Flood of one hundred (100) year frequency: definition