I also got a friend into the chemical cleaning of beer lines & that also paid very well.

The fees from loans, appraisals, inspections, and other involuntary costs are the same for high and low price properties, so the percentage of cost is harsher on lower priced ones.  

I have a degree in Chemical Engineering, but recently lost my job (so if you know anyone hiring, let me know).

They can either tent the house, or "spot" treat, which is injecting chemical into the walls wherever they see signs of them.

The trap under the master tub let go (I realize it was likely coincidental, but likely hastened by the heavy chemicals), the water then ran down 2 stories into the basement, taking out 2 "vintage" plaster ceilings, basement carpet, etc.  

@Mike Reynolds I'm a chemical engineer working in mechanical manufacturing.

Does your city require a crack house clean up as a chemical waste site? 

Assuming you've fixed the leak and dried it out... spray the walls with your choice of chemical like chlorox.

Ideal for hospitals, schools, hotels/motels, nursing homes and office environments where a highly washable and stain resistant finish is needed. ( http://www.iciduluxpaints.com/ourbrands/PaintCoating.jsp )I'm very chemically sensitive and was able to be in the house the next day with no negative reactions/no odors.

I am no expert on CO2 but I think refining oil into gas pollutes far more and uses more harmful chemicals than reusable batteries ever could.