If you have any doubts or want to practice, I would pull the fridge and do the hidden side of that cabinet or maybe try on the back of a cabinet door (with a disposable brush sponge) for practice and to see the effect.

A sump pump typically would handle ground water only and dispose of outside.

I would use the tools at my disposal from the BUSINESS TRANSACTION we entered into.

Let me share a story on a CL laborer "GIG" hire.Several years ago I had to create a few drain fields for my swimming pool, and at the end I end up with a big pile of excavated sand that needs to be disposed of.Imagine how much sand a typical bathtub will hold, well multiply that by 5.I posted an ad on CL, posted a picture of the big mount of sand, gave the estimated volume how many cubic feet, and asked for a lump sum quote to come pick it up and dispose of it. 

When you dispose of a personal asset you may then determine it's value and success as being a personal investment.

You will have 80% value of the property value at your disposal. 

We removed the oil from the tanks, cut them up, and disposed of them.

If they left any personal items in the unit, be sure to follow your state laws about disposing of them.

The reason I say that is with so many different investors utilizing various types of capital - i.e. disposable investment funds, retirement capital, and other qualified plans, a mass withdraw by more than 50% of our investors isn't likely.

If I build a deck, I can leave my scraps technically, unless there is a line item for cleanup and trash disposal or it's stipulated in the contract that i will leave nothing but installed materials on site.