The DMMP Agencies held a public workshop on June 20th, 2018 to discuss ideas for monitoring of the non-dispersive open-water disposal sites in Puget Sound. The workshop was hosted by the Port of Tacoma at the Fabulich Center in Tacoma from 9am - 12pm. There were 21 attendees from ports, environmental consultants, laboratories, tribes, and state agencies and 8 representatives from the four DMMP agencies. Click on links below for PDF documents.
Brief Workshop Summary
Challenges and issues with changing the monitoring plan
- High stakes and uncertainty
- Over-complication of the issues
- Continued confusion on regulatory requirements (e.g. Site Condition 2, Sediment Management Standards, regional background, etc.)
- Do we lack relevant data (e.g. onsite tissue, paired sediment/tissue data) or not?
- Potentially use existing data to compare with background, as Windward did with PAHs
- Are we asking the right monitoring questions?
How can we prevent future issues?
- Front end bioaccumulation like the rest of the nation does (e.g. test more project sediments)
- What are relevant species?
- What would be relevant target tissue levels (TTLs)?
Components of a successful design
- Clearly define success/fail endpoints
- Defensible, sufficiently protective, cost effective
- Take overall Puget Sound health into account, not just the disposal sites
- Clear and concise guidance
- Meaningful links between monitoring and project evaluation
- concern that TTLs would be used to develop really low sediment screening levels (SLs) as was done in Oregon
Ideas for redesigning the monitoring plan
- See markup of disposal site monitoring framework table, pages 13-15 here
- Routine versus special studies
- Take advantage of other monitoring program data that are out there
- Possible role of incremental sampling methodology (ISM) for bioaccumulatives questions
- Define role of regional background
- Would measuring point be sediment or tissue?
- Calculate risk using site specific reasonable maximum exposures (RMEs)
- What species are really present/using site?
- Use TTLs, or calculate to sediment SLs?
- Use of cores to provide temporal/vertical information
- Data collected on and off site should be comparable (same species, same sediment depths, etc.)
- Conduct bioaccumulation before and after disposal season
- More use of weight-of-evidence approach