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A sanitary manhole under construction. A sanitary manhole (sewer manhole, [1] sanitary sewer manhole [2] or sewer maintenance hole [3]) is a manhole that is used as an access point for maintenance and inspection of an underground sanitary sewer system. Sanitary manholes are sometimes used as vents to prevent the buildup of pressurized sewage ...
A round manhole and its cover. 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.
A street sweeper or street cleaner is a person or machine that cleans streets. People have worked in cities as "sanitation workers" since sanitation and waste removal became a priority. A street-sweeping person would use a broom and shovel to clean off litter, animal waste and filth that accumulated on streets. Later, water hoses were used to ...
In the U.S., the biggest polluters are often concentrated in underserved, mostly minority communities.
In the days after UnitedHealthcare CEO Brian Thompson was gunned down in New York City, many social media users took it upon themselves to try to solve the mystery of who killed him — and why.
"We're all going to be figuring it out together, but there's nothing to go back to"
Chemical phosphorus removal is a wastewater treatment method, where phosphorus is removed using salts of aluminum (e.g. alum or polyaluminum chloride), iron ...
Costco eggs recalled were given a recall of the highest level by the Food and Drug Administration for potential contamination with salmonella.