I agree that remediation can be costly but you have to consider that if done properly and according to the law this requires specialized training and equipment. This is costly to acquire.
Remediation companies may come and go in what may seem like a short time and it is hard to see how the cost is justified but there is a sizeable investment on the part of the contractor that the average customer just doesn't see or understand. Then there are also the health risk issues. Special garb is required as well as specialized air handling and filtration equipment - something you wouldn't readily have access to.
Most attorney's in this area will talk to you one time without charge. This gives them an idea as to whether or not somebody has deep enough pockets for them to get involved, it's worth a shot.
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Whatever you decide for whatever reasons you decide
please don't not do anything.
Here's a source and some information for the MicroBan product, I would start there immediately. In Boston this product will be on some suppliers shelf somewhere and you could buy a gallon today.
Microban Disinfectant Spray Plus