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I am not in the demolition industry, but here are my answers based on my own observations.
# 1. Water is sprayed on buildings during demolition to keep dust down. Demolishing a building in a populated area without dust control can get surrounding properties dusty, and is a health issue. If the building has asbestos's, it should of been abated. If it was abated water will still sprayed on it as a safety precaution.
# 2. Water trucks & hoses are the most common form of dust control. Most of the water comes from fire hydrants. The demolition contractor should contact the water department/authority, and they will install a meter on the hydrant they are getting it from. Ounce demolition is complete, they will get a bill for the water. If there is another type of water source around such as a water in a rock quarry, or a man made reservoir.
So I have noticed in a few pictures on here and seen it mentioned in passing that some structures are sprayed down with water as they are being torn down. I have a few questions about this and they are;
1. Is this done all the time or just when something like asbestos is present?
2. How is the water is brought / supplied? (Does the primary contractor or a sub bring out a water truck with a hose, does the local FD get requested to do this or does a hose simply get hooked up to a hydrant with FD approval?)
I am asking these questions because I am looking at purchasing a water truck to use for construction support (dust control) and be contracted out to federal / state emergency response agencies. Depending on how spraying down buildings being torn down is done, it may be something that I plan on adding to the list of possible services.
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