By the time of this Webcast, the California Department of Public Health is expected to have published a proposed Maximum Contaminant Limit (MCL) for hexavalent chromium (Cr[VI]) in drinking water. The U.S. Environmental Protection Agency is also evaluating new toxicological data on Cr(VI) as part of an effort to evaluate the need to develop a national primary MCL for Cr(VI) in drinking water. This Webcast will address these developments by presenting the results of WaterRF project #4450
, which evaluated the removal of Cr(VI) from 10 groundwater sources in an effort to understand the impact of different water quality parameters on the performance and cost of three Cr(VI) treatment technologies: Weak-Base Anion (WBA) resin, Strong-Base Anion (SBA) resin, and Reduction-Coagulation-Filtration (RCF). Based on the treatment performance, capital and annual Operations & Maintenance cost estimates were developed for each treatment technology. A Web-based Cr(VI) treatment cost tool was also developed and posted on a dedicated website (www.CrVITreatmentCosts.com
). The Webcast presents the capital and annual cost estimates developed, and includes a discussion of the assumptions behind the cost tool and instructions on how to use it. Both the Webcast and Cr(VI) cost tool are free and available to the public.