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The U.S. Environmental Protection Agency (EPA) estimates that at least 23,000 to 75,000 SSO events occur in the United States each year. [1] EPA estimated that upgrading every municipal treatment and collection system to reduce the frequency of overflow events to no more than once every five years would cost about $88 billion as of 2004. [2]
A manhole cover is a removable plate forming the lid over the opening of a manhole, an opening large enough for a person to pass through that is used as an access point for an underground vault or pipe. It is designed to prevent anyone or anything from falling in, and to keep out unauthorized persons and material.
Passive drains rely on gravity or capillary action to remove fluid, whereas active drains rely on a suction/vacuum force, whether that be through connection to wall suction, a portable suction device, or a bulb that has been squeezed to create a vacuum. Open drains are commonly used for superficial wounds and drain into dressings or a stoma bag.
At the 2020 census, the racial and ethnic composition of the state was 42.5% White (39.8% non-Hispanic White), 11.8% Black, 5.4% Asian, 0.3% American Indian and Alaska Native, 0.1% Native Hawaiian and other Pacific Islander, 13.6% some other race, 17.6% two or more races, and 40.2% Hispanic and Latino American of any race.
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