In mid-May, the National Cooperative Highway Research Program (NCHRP) released the report “Measuring and Removing Dissolved Metals from Stormwater in Highly Urbanized Areas.” The issue of dissolved metals is coming to the forefront in stormwater management and is an increasing concern for regulatory agencies. This is especially true in urbanized areas with limited space for stormwater treatment devices. NCHRP is part of the Transportation Research Board of the National Academies of Science. In the report, the group covers best management practices for removing dissolved metals as well as three conceptual configurations for highly urbanized, rural, and bridge scenarios. These configurations include two vault systems and an inlet scupper with media for bridge deck drainage systems. Additionally, the report covers how to integrate these configurations into new and existing drainage systems. Some concerns exist surrounding consistency in methods to determine dissolved metal content. Measurements can vary widely due to measurement and testing methods, equipment, and more. The report seeks to remedy this issue by covering dissolved metal measurement protocols. Read more.
November 6, 2012
December 5, 2016