Methylmercury in Dredged Operations and Dredged Sediment Reuse in the San Francisco Estuary
Date:
January 28, 2010 - 1:00am to 8:00am
First Floor Auditorium
State of California Building
1515 Clay Street
Oakland, CA 94612
Meeting Purpose: Discuss information needs and options for managing adverse impacts of methylmercury from dredging and dredged material placement, particularly in restoration efforts.
Target Audience: Participants will include representatives from the dredging community, managers, scientists, the USACE, and other interested parties.
Meeting Goals: The meeting goals are to:
- Summarize the state of knowlege of methylmercury processes for dredging and dredged material placement
- Explore which components of the ecosystem need to be monitored in order to evaluate methylmercury impact
- Discuss how we define a positive outcome with respect to dredged material reuse
Contact Don Yee at (510) 746-7369, Jennifer Hunt at (510) 746-7347, or Bill Brostoff at
(415) 503-6867 for more information.
Presentations
- Bill Brostoff (USACE)
Welcome/goals for this meeting (Presentation PDF) - Ellen Johnck (Bay Planning Coalition
Welcome/goals for this meeting (VIDEO) - Steve Goldbeck (San Francisco Bay Conservation and Development Commission) Introduction to the LTMS and LTMS questions regarding mercury methylation and dredging
activities/dredge material placement (Presentation PDF) (VIDEO) - Dyan White Agency discussion of MeHg management needs Context of overall MeHg management
strategy for San Francisco Bay. Goals of mercury TMDL. (Presentation PDF) (VIDEO) - Brian Ross (USEPA) Context for evaluating dredging/dredge material disposal/dredge material reuse. Dredging
operations and dredged sediment disposal quantities, present and projections Relative
amts in bay ocean upland and wetland disposal, how big is this issue (Presentation PDF) - Don Yee (SFEI) A Simple MeHg mass budget for SF Bay Context and extrapolation of dredged material/wetland contribution Don Yee, SFEI- gives a sense of how big an impact dredging and
restoration operations could/would have on the whole system (Presentation PDF) (VIDEO) - Mark Marvin-DiPasquale (USGS) How sediment mobilization affects inorganic mercury speciation and methylation potential: Case studies from Alviso Slough and the S. Yuba River (VIDEO)
- Elly Best (ERDC) Summary of Hamilton Wetland Restoration Studies Very detailed info- how can/do we design restoration and monitoring plans based on info collected, and extrapolate to other
sites. Lessons learned. (Presentation PDF) (VIDEO) - Mark Stephenson (CDFG) MeHg transport to/from Suisun Bay wetlands Estimates, uncertainties and challenges of export measurement (Presentation PDF) (VIDEO)
- Bryan Bemis (Applied Marine Sciences) Mercury methylation in dredged material settlement ponds from Sacramento and San Joaquin River dredge material. (Presentation PDF) (VIDEO)
- Holger Hintelman (Trent University) Measuring methylmercury exposure
Monitoring options- Diffusion Gradient Thinfilm (DGT) Is this a good surrogate for biota? Or
water or sediment? (Presentation PDF) (VIDEO) - Letitia Grenier (SFEI) Monitoring options- biosentinels Make your beneficial use target your monitoring tool. Management planning options. South Bay Salt Ponds Plans- Case study/ Example strategy
-how to move ahead without certainty - benefits, pitfalls, best/worst case scenarios. (Presentation PDF) (VIDEO) - Manager Round Table (VIDEO)
- Scientist Round Table (VIDEO)
Programs and Focus Areas:
Clean Water Program