You should ask if the construction crew will be cleaning the site at the end of each work day or if they will be cleaning all of the accumulated dust and dirt at the end of the job. You should also find out if the crew will be cleaning the site themselves or if they will be subcontracting it to a third party cleaning company. If so, then you should ask for details about this company (name of the company, when they will be arriving, etc.). If they intend to hire a third party company, you should find out if this will be included in the initial cost of the construction or if you will be subject to an additional charge. Asking these questions will help you avoid any nasty surprises when it comes to the cleanup on your construction.