Dredged Material Placement Site Monitoring for Stockton and Sacramento Deep Water Ship Channels
Service: Water Quality Monitoring
Following several previous investigations for the USACE, AMS has been conducting field monitoring of methylmercury (MeHg) in the Stockton and Sacramento Deep Water Ship Channels during maintenance dredging operations and in dredged material placement (DMP) sites. AMS’ responsibilities included coordination of all field activities, subcontracting for analytical services, data management and quality control, and reporting. As part of the current investigation, AMS developed a protocol to perform real-time turbidity profiles of the water column to direct water sampling to targeted locations. AMS follows State mandated data quality measures, such as the use of low detection limit analyses for the analytical work and ensuring clean hands techniques training to avoid cross-contamination. The work is being closely coordinated with the USACE, and address management questions of importance to the State Water Board.