I'm in Florida but my daughter in massachusetts has a next door neighbor that runs an application business out his house, six trucks, vans, with gas powered granular spreaders. When the applicaters get back to his house at end of day, they walk the spreaders to the side of his house and use the hose to clean the machines. How can this be legal? My daughter says she often feels neaseaous sp? when outside, but when I saw this while visiting, I don't wonder why. One guy had a lot of buildup on spreader, so he must have quite a lot of chem leeching thru his gravel drive. Any thoughts licensed apps?