Measuring and modeling particulate matter emissions from heavy-duty construction equipment.

839297494PDFTech Reporthttp://bibpurl.oclc.org/web/48759CA11-120465A0282CaliforniaCalifornia. Dept. of Transportation. Division of Research and InnovationBarth, MatthewDurbin, ThomasMiller, J. WayneRussell, R.L.Scora, G.University of California, Riverside. Center for Environmental Research and TechnologyUnited States. Federal Highway AdministrationUS Transportation CollectionGaseous and particle emissions from construction engines are an important fraction of the total airpollutants and are gaining increasing regulatory attention. Quantification of NOx and PM is necessary toinventory the contribution of the construction equipment, such as used by Caltrans, to atmosphericloadings, particularly for those projects in non-attainment or maintenance areas. At present, however, thereis no model mutually accepted by Caltrans and regulatory agencies that can be used for the estimation ofconstruction emissions or the development of appropriate regulations. This is due in part to a lack ofemissions data from construction equipment under in-use operating conditions. The lack of a soundscientific basis for regulation has resulted in legal cases and other obstacles that could potentially delay orinhibit important transportation projects