EVALUATION OF A METHOD OF FOG DISPERSAL BY IONIZATION

THE EFFECTIVENESS OF A TRUCK-MOUNTED IONIZED, WATER-SURFACTANT FOG DISPERSAL TECHNIQUE WAS EVALUATED UNDER CONTROLLED CONDITIONS. THE AMOUNT OF TIME REQUIRED FOR AN UNTREATED FOG IN A CHAMBER TO ATTAIN A REFERENCE VISIBILITY (450 FEET AS ESTIMATED BY A HUMAN OBSERVER) WAS COMPARED TO THE TIME REQUIRED FOR A TREATED FOG TO REACH THE SAME REFERENCE VISIBILITY. THE TIME REQUIRED TO REACH 450 FEET IN THE UNTREATED FOG WAS NOT SIGNIFICANTLY DIFFERENT THAN THE TIME REQUIRED TO REACH 450 FEET WITH ANY OF THE CONTRACTOR'S APPLICATIONS OF DISPERSAL TREATMENT. BASED ON THESE DATA, IT WAS CONCLUDED THAT THE FOG DISPERSAL TECHNIQUE USED BY THE CONTRACTOR DID NOT DEMONSTRATE EFFECTIVENESS IN DISPERSING FOG IN A CONTROLLED ENVIRONMENT. /FHWA/