EE WAS HYDRO BLASTING A 2"" PRODUCT MATERIAL LINE WITH A 40K LANCEHOSE. OTHER OPERATED THE FOOT PETAL. THE PRODUCT LINE WAS APPROX. 20 FEET IN THE AIR ADJACENT TO A CATWALK, WHICH WAS USED FOR ACCESS TO THE LINE. EE WORE A SAFETY HARNESS ANDWAS TIED TO TO AN I BEAM, WHILE STANDING ON THE PIPE RACK.