Experimental road dust measurement device

Most unpaved road dust measuring devices have employed one or more of the a ir sampling techniques used by atmospheric scientists, namely, sedimentatio n, filtration, and photometric techniques. The dust measurement quantificat ions have been for a section of unpaved road either involving the use of mo ving devices, or at a point(s) along a section involving the use of a stati onary device. Devices based on the photometric technique have measured and quantified dust on a real time basis without laboratory analyses of field d ata, while devices based on the sedimentation and filtration techniques hav e relied on laboratory analyses of field data for dust quantification. The Colorado State University dustometer, an experimental road dust measurement device based on the filtration technique is presented in this paper. The d evice and technique were developed, field tested, and used in comparative f ugitive dust emission studies at Colorado State University and documented b y Addo and Sanders. The device, which is basically a moving dust sampler, c onsists of a standard high volumetric sampler with associated filter media and accessories mounted on the rear of a pickup truck. Many dust measuremen ts can be made in a single day using the dustometer. The dustometer has pro ved to be a very quantitative, reproducible, and precise measurement device for unpaved road dust measurements.