through material the gaseous ozone 314 is transferred from the ozone generator 304 to the manifold 312 then to each nozzle 412 where the gaseous ozone 314 combines with the liquid 405 in an embodiment the gaseous ozone 314 is transferred by a pump 316 at a pressure of about 60 pound per square inch psi the ozone generator 304 is operated by a user using conventional control mechanisms in an embodiment the liquid system 402 includes a liquid source 404 connected to nozzles 412 in an embodiment the liquid source 404 is a tank 414 containing water a pump 406 operably connected to the power supply 306 moves the liquid 405 from the liquid source 404 to the nozzles 412 as a pressurized liquid by conduits 408 and a manifold 410 the nozzles 412 are arranged in an array to apply the liquid 405 to the surface 106 in a consistent manner in an embodiment the nozzles 412 are spaced along a support structure 116 such as a boom at an end of the frame 110 referring to fig3 the nozzles 412 include a body 416 defining a liquid flow passage 242 with an inlet 418 at one end and an outlet 420 at an opposite end the liquid flow passage 424 has a wide diameter upper portion 426 immediately above a smaller diameter middle portion 428 a port 422 located between the inlet 418 and outlet 420 extends from.