I think the biggest factor here is the cost in safely removing it. Sure its not harming anyone in the walls, but mice may still stir it up and spread it around the building, and you’ll never want to puncture the wall to hang a picture or a shelf. It is considered adequate because the exposure is so low, you would have a hard time proving it was specifically the asbestos that caused health concerns.
When removing it a crew can wear P.P.E. and use extensive techniques to remove as much asbestos as possible, this is however very expensive and often equates to a full renovation + cleaning/removal. Instead it is much cheaper to ignore responsibility for the substance by following a “do not disturb” policy.
I think the biggest factor here is the cost in safely removing it. Sure its not harming anyone in the walls, but mice may still stir it up and spread it around the building, and you’ll never want to puncture the wall to hang a picture or a shelf. It is considered adequate because the exposure is so low, you would have a hard time proving it was specifically the asbestos that caused health concerns.
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When removing it a crew can wear P.P.E. and use extensive techniques to remove as much asbestos as possible, this is however very expensive and often equates to a full renovation + cleaning/removal. Instead it is much cheaper to ignore responsibility for the substance by following a “do not disturb” policy.