Usually done on "quarters" or "thirds" IE tenant and owner split seed, fertilizer and chemical costs 75/25 or 66/33 and the tenant farmer pays the owner 1/4 or 1/3 of revenue generated as rent.

And it's not uncommon for water to leave residue behind, which is why dishwashers have special chemicals designed to remove the water residue.

Even if the walkways, steps, driveways and parking lots have been shoveled, plowed or treated with salt/chemicals, you understand that slippery conditions often appear without notice and are not visible.

No furniture, paint, chemicals, cleaning supplies, mops, etc.

Be sure to never use a pipe cleaner that contains sulfuric acid or other chemicals.  

Also, keep your ductwork out of the attic if at all possible to avoid chemical smell from AC unit.

No portable kerosene/gas/incense burning; limit candle burning; no excessive odorous chemicals/sprays/vapors; restrict toilets to biological waste and tissue paper; keep drains clear No BBQ’s or open fires in units or under eaves, canopies, porches.

If it was a meth lab you'll need to contact the city to obtain special permitting as well as testing to ensure that it doesn't have toxic chemicals and is safe for occupancy.

Nor do you know the specifics about chemicals used to treat it, you likely don't have the mega expensive professional mower and other equipment they have, you don't have a crew of guys who can get it done in 30 minutes, etc. 

You can use it to grind off the material, without using chemicals with foul odors.