Here is a warehouse that we softwashed this past week for property manager. We also did the one next to it yesterday as well. Lots of grease and dirt, and a little algae. They wanted it cleaned but did not want to use any pressure, because the building has had some leaking caulk joints. We sprayed the majority of the building with a 2% mix, but bumped it to 3% for the one really nasty side. Lots of degreaser(Terra Wash) in the mix and the booster pumps were a huge help, since we only had two water sources.