So I'm on the truck because we have a building 2hrs away that we have never done b4. 3200 ft of commercial carpet, 400 ft ceramic tile, 300ft of vinyl flooring(when arrived this turned out to be vct completely covered in printer ink) new tennant in building 3 yrs, no cleaning during this time and prob not much b4. Chairs running on carpets with no pads. I test carpet for sand. We are good that they were not full of sand! Got lucky here. This building doesn't have the normal greasy soils found in most buildings, it is full of the fine dry soils that came from a very dry service area of concrete(large building with front offices). 1st prespray mixture for commercial carpets and no results, barely made any change. Get out my six gal electric sprayer and mix my favorite hot sauce, BAM we see clean carpet. Proceed on and cleaning tiled areas as we get to them. 5.5 hours of 2 man crew, 800 gallons of water, 25 gallons of concentrate, 12 gallons of concentrated prespray, 1/2 gallon of deodorizer and the building is now clean and smells great. OH, and blowers running to get carpets dry so we can check for any areas that may brown. We don't want to have to return here. No browning occured (carpets dried in less than 2hrs with blowers) Back to shop at 9:50pm, left shop at 7:40am to do 4 houses then 2 hrs south to do comm job, long day I tell ya. Almost forgot, going back anyways to sand the vct to remove dried ink and build it back up with wax. Tried to talk them into replacement. Test showed vct floors will look like new when done.