At times, the odor was so strong you can smell it walking in the main entrance into the lobby.There's been some discussions here on remediating it with chemicals.

You can use any toxic combination of cleaning chemicals and it won’t damage the floor.

Replace all TCs, drain water, add chemicals in all toilets to kill roots in the system.

Heat and chemical.

The pest company should take on treatment for termites, framing work, and anything that requires chemical treatment. 

Please make sure you or workers wear cartridge style air respirator when removing that carpet and spraying with any of these strong chemicals also probably should wear a white tyvek style suit etc. 

Septic companies around here dont clean drainfield lines , they just replace ( around $ 20K with the new systems ) So I am figuring on about 200 bucks in stone and 80 dollars in fittings and 100 in chemicals .

The problem wasn't as much the subprime loans as it was what the big banks did with them by packaging them into terrible products called CDOs and synthetic CDOs.

I spray the leaves with Round-up on a warm dry day (normally wouldn't use it, but sometimes chemicals are your friend), then plan to go out in a day or two and remove as much as possible.  

We have a dog and cat that have brought fleas into the house and instead of using harsh chemicals, we spray this on the animals and floor, furniture and carpet.