2015 Brandee EraMiller Washington State Department of Ecology Environmental Assessment Program Toxics Studies Unit Presentation to SRRTTF TWG 1616 May 2015 September 2015 Results for total PCB congeners ID: 460885
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Slide1
Preliminary Results from Surface Water Monitoring with C.L.A.M. at the Spokane Tribal Boundary in May and September of 2015
Brandee Era-MillerWashington State Department of EcologyEnvironmental Assessment ProgramToxics Studies Unit
Presentation to SRRTTF TWG 1-6-16Slide2Slide3
May 2015
September 2015
Results for total PCB congeners:
Results are within the noise of the C.L.A.M. sampling system (SPE disk housing contamination)
Concentrations represent totals from Lab (need to blank correct per project objectives)
Blanks shown are either Trip or Transfer (most
comparable to samples)Slide4
PCB Homologue Example:
Mono and Di (lightest) and Nona and Deca (Heaviest) – no environmental signal
Tri through Octa appear to have potential environmental signal above the noiseStill need to look at this for all samples
20 liter C.L.A.M.
f
rom May 2015Slide5
Results for PBDEs:
Blanks shown are either Trip or Transfer (most comparable to samples)PBDE 47 appears to have strongest environmental signal above sampling system noisePBDE 99 and 209 are in the sampling system noise for half of the samples
Still need to look at other PBDE congeners (40+)
May 2015
September 2015Slide6
What Next?
Use XAD-2 instead of C.L.A.M. for upcoming January sampling:See if results can get above the noiseUpcoming Ecology study using XAD-2 at same location (Will Hobbs)
Apply blank correction per project objectives and TWG input
Look for patterns and information in
homologues & congeners
Summarize study information on C.L.A.M. QA/QC:
Breakthrough SPE disk analysis
Characterization
of PCB contamination from disk
housing
EAP still evaluating appropriate use of C.L.A.M.
May not be best tool for low-level PCBs
Stainless
steel SPE disk
housing
Waiting on results of AXYS blank studySlide7
How to Blank Correct?Report NJs per SRRTTF/LimnoTech QAPP, but do NJs get included in totals?
If using NJs, then should we include NJ data in blank correction? Seems like a good idea.3x blank rule used in SRRTTF/LimnoTech
QAPP, but 3x rule is typically not used by labs.5x and 10x are more typical.Examples below are from Spokane Tribal Boundary Monitoring Study.