.* to neutralize muriatic acid just pour some baking soda powder into it, stir and it will neutralize it.You should wear a respirator or mask while working with or neutralizing muriatic acid to avoid breathing in fumes

You can wear a painters suit and 100%cheap respirator to protect yourself if you choose.

You put down a tarp to catch little pieces,don a rainsuit and respirator and use a potato fork or roofing spade and they roll right off. 

It's about as nasty as they come, I couldn't go in the house without a respirator.

Knee pads and respirators are essential. 

I pull the carpet/pad and tack strip, use a  bleach water solution to mop subfloor  (with respirator) rinse,  then after dry, I also use the oil based kilz on subfloor (pretty thick, respirator a must); then, and I am rooting for you Jeff, and hoping you do not need the next step..... but if you still smell it.....

it is worth a try to tsp, rinse, then kilz (I would use old school oil based with respirator) or shellac seal the walls..

See if he will do it if you spring for a respirator and tyvek suit (should run you about $50-$60) or see if you can find another appraisor

You also have to pay fairly well to keep competent employees that are willing to work on a hot roof all summer in 100 degree Central Valley heat spraying foam in tyvek suits and respirators.

And rabbit pee is meant to be the worse - and it damages hardwood floors quite badly - it literally strips the coating off the floor.But removing carpet is easy, buy a mask, and get on your hands and knees with a knife, pry bar, whatever.Really recommend these:http://t.homedepot.com/p/3M-Professional-Multi-Purpose-Respirator-62023HA1-A/202080144/ And then burn your clothes afterwards.