i worked construction,road/site work as a laborer only needed to take pre employments,no randoms,but if ur an operator u get when when ever they feel like it,if your good in the company and are good with ur real boss not the foreman well that counts but if ur a good worker n only come out with thc they dont really care,and usually give you a heads up when they need ur pee but this was in ct non-union idk where u are but just keep good with your bosses and you will be fine