Human exposure to PCBs, PBDEs and bisphenols revealed by ...
Understanding the Sources and Fate of PCBs and PBDEs in...
1
Atmospheric Sources Deposition to Georgia Basin of both locally generated and long-range transport PCBs and PBDEs is a potentially huge and unquantified source. Collaboration between Fisheries and Oceans Canada and Environment Canada to conduct rainwater, volatile gaseous and dryfall samples at two sites. For details see poster : Analysis and interpretation of the 2004 sampling period continued atmospheric sampling using passive collection devices 2004-2005: » 2005 + » » P4 by Neil Dangerfield : et al. The pollution shadow: characterizing "local" and "global" air pollution in the Strait of Georgia Marine Vancouver Island Vancouver Coast Mountains Johnstone Strait Str. of Juan de Fuca Puget Sound The Strait of Georgia is contiguous with the Pacific Ocean to the west and north, and has tidal exchange with Puget Sound through Admiralty Channel. Attempts will be made to estimate the net transfer of contaminants. Internal particle transport and deposition processes within the Strait strongly affect the transport of bound contaminants. Recent work at the Institute of Ocean Sciences with sediment traps, sediment cores and transmissometer data has suggested that most of the particles entering the Strait of Georgia tend to stay there. cores collected from various sites in the strait are underway. Additional sampling and analysis of surficial sediments is planned. Analyses of PCBs and PBDEs in sediment Freshwater Inputs Loadings from freshwater constitute the integrated contaminant signal from local watershed releases and atmospheric deposition from distant sources. Data from POPs measurements on alpine snowpack suggest that meltwater runoff could be a significant loading. As well, glacial meltwater carries the legacy of past organochlorine use. Characterization and estimate from the Fraser River to the basin was undertaken. The Fraser contributes much of the total . For sampling details see platform presentation Additional loading estimates on other select rivers draining to the . 2004-2005: » 2005-2008: » loading freshwater to the Strait of Georgia by Strait of Georgia F1.3 Mark Sekela et al. A novel approach to sample for river water quality in the Fraser River estuary Biota and Food Chain modelling Suprisingly few contaminants data are available for any biota in the Georgia area. As well, transfer through food chains and webs in the region is doubtless an important mechanism of exposure. : Development of a food chain accumulation model at Simon Fraser University. For details see poster work by Donna Cullon at the University of Victoria characterizing POPs accumulation in marine mammals. For details see presentation by role of marine birds as reservoirs and vectors of contaminants. In Georgia are large populations with elevated contaminant burdens. For details see poster possible biotic exchange of contaminants from both the open ocean and neighbouring Puget Sound Strait of synoptic sampling and analysis of shellfish in the Strait of Georgia by Fisheries and Oceans Canada. by continued sampling and analysis of biota in the region important » Strait of by » 2004-2005: 2004 - 2007 » » » » P4 Colm Condon and Frank Gobas: P2 John Elliott et al.: A marine food-web bioaccumulation model for PCBs and PBDEs in the Georgia Basin Trends in polybrominated diphenyl ethers in eggs of aquatic and marine birds from British Columbia, Canada, 1979-2002 B3.1 Peter Ross et al.: Emerging concerns: flame retardants in the marine mammals of Puget Sound and Strait of Georgia Other questions: 2004-2006: » Data relating to historical levels and loadings of PCBs and PBDEs to the Strait of Georgia are being assembled and reviewed. The final data will be incorporated in a georeferenced database for subsequent addition, mapping and analysis. Data Review and Assembly EVolution of the Project Publication by Ross of work showing local killer whales to be the "most contaminated marine mammals on earth" et al. Interest in the issue grows. In particular, the possibility of elucidating the relative importance of sources and transfer to higher trophic levels. SETAC PNW Chapter hosts an excellent workshop at U of W Friday Harbor Lab with the intent of setting the foundation for a model of PCBs in Puget Sound and Georgia Strait. Much momentum, but no available funding. Through the Georgia Basin Action Plan, funding is secured for both atmospheric deposition studies and mass balance/ modelling work in Georgia Strait. Workshop was held in December 2003 to develop partnerships in BC. Photo by Graeme Ellis 2004 First year of data assembly/collection commences. 2008 End of Program 2000 2002 2003 Point-Source Discharges Point-source discharges, including stormwater runoff, leaching from landfills, and industrial and wastewater effluents all potentially contribute to the PCB and PBDE loading to the Strait of Georgia. : Municipal wastewater effluent characterization programs were undertaken in collaboration with the Greater Vancouver Regional District (Vancouver) and the Capital Regional District (Victoria) with analysis by high-res GC/MS » the Greater Vancouver Regional District is conducting retrospective analyses of collected in 1996 for PBDE congeners to examine the time-trend in loadings Source identification and continued effluent characterization to estimate loadings 2004-2005 » 2005+ » While regulatory bans and voluntary disuse of PCBs in British Columbia and Washington State have resulted in greatly decreased environmental concentrations, there is still cause for concern in some areas. For example, in the Strait of Georgia high PCB concentrations have been measured in killer whales, resident seals and returning salmonids. PBDEs are similarly persistent and bioaccumulative, and unlike PCBs, their discharge remains relatively uncontrolled. We have embarked on a program to study the loading and fate of PCBs and PBDEs to the Georgia Basin. Through a combination of direct measurements and modelling we plan to develop a comprehensive picture of the loading, movement and fate of these contaminants in the region. The presentation here outlines some recent and proposed activities related to the project. Introduction Understanding the Sources and Fate of PCBs and PBDEs in the Georgia Basin Patrick Shaw , Peter Ross , Sophia Johannessen , Robie Macdonald , Colm Condon , Frank Gobas 1 2 2 2 3 3 1 2 3 Environment Canada, Vancouver, BC; Institute of Ocean Sciences, Sidney, BC; Simon Fraser University, Burnaby, BC Acknowledgements Funding is provided through the Georgia Basin Action Plan, Environment Canada. Special thanks to staff of both the Capital Regional District in Victoria and the Greater Vancouver Regional District in Vancouver Photo by Peter Ross Photo by Gail Moyle [email protected]
Transcript of Understanding the Sources and Fate of PCBs and PBDEs in...
Atmospheric Sources
Deposition to Georgia Basin of both locally generated and long-range transportPCBs and PBDEs is a potentially huge and unquantified source.
Collaboration between Fisheries and Oceans Canada and EnvironmentCanada to conduct rainwater, volatile gaseous and dryfall samples at twosites. For details see poster
:Analysis and interpretation of the 2004 sampling periodcontinued atmospheric sampling using passive collection devices
2004-2005:»
2005 +»»
P4 by Neil Dangerfield :et al. The pollutionshadow: characterizing "local" and "global" air pollution in the Strait ofGeorgia
Marine
Vancouver Island
Vancouver
Coast MountainsJohnstone Strait
Str. of Juan de Fuca
PugetSound
The Strait of Georgia is contiguous with the Pacific Ocean to the west and north,and has tidal exchange with Puget Sound through Admiralty Channel. Attemptswill be made to estimate the net transfer of contaminants.
Internal particle transport and deposition processes within the Strait stronglyaffect the transport of bound contaminants. Recent work at the Institute of OceanSciences with sediment traps, sediment cores and transmissometer data hassuggested that most of the particles entering the Strait of Georgia tend to staythere.
cores collected fromvarious sites in the strait areunderway. Additional sampling andanalysis of surficial sediments isplanned.
Analyses of PCBs and PBDEs insediment
Freshwater Inputs
Loadings from freshwater constitute the integrated contaminant signal fromlocal watershed releases and atmospheric deposition from distant sources.
Data from POPs measurements on alpine snowpack suggest thatmeltwater runoff could be a significant loading. As well, glacial
meltwater carries the legacy of past organochlorine use.
Characterization and estimate from theFraser River to the basin was undertaken. TheFraser contributes much of the total
. For sampling details seeplatform presentation
Additional loading estimates on other selectrivers draining to the .
2004-2005:»
2005-2008:»
loading
freshwaterto the Strait of Georgia
by
Strait of Georgia
F1.3 Mark Sekela et al.A novel approach to sample for river waterquality in the Fraser River estuary
Biota and Food Chain modelling
Suprisingly few contaminants data are available for any biota in theGeorgia area. As well, transfer through food chains and webs in the
region is doubtless an important mechanism of exposure.
:Development of a food chain accumulation model at Simon FraserUniversity. For details see poster
work by Donna Cullon at the University of Victoriacharacterizing POPs accumulation in marine mammals. For details seepresentation by
role of marine birds as reservoirs and vectors of contaminants. InGeorgia are large populations with elevated contaminant burdens.
For details see poster
possible biotic exchange of contaminants from both the open oceanand neighbouring Puget Sound
Straitof
synoptic sampling and analysis of shellfish in the Strait of Georgia byFisheries and Oceans Canada.
by
continued sampling and analysis of biota in the regionimportant
» Straitof
by
»
2004-2005:
2004 - 2007
»
»
»
»
P4 Colm Condon and FrankGobas:
P2 John Elliott et al.:
A marine food-web bioaccumulation model for PCBs andPBDEs in the Georgia Basin
Trends inpolybrominated diphenyl ethers in eggs of aquatic and marine birdsfrom British Columbia, Canada, 1979-2002
B3.1 Peter Ross et al.: Emerging concerns: flameretardants in the marine mammals of Puget Sound and Strait ofGeorgia
Other questions:
2004-2006:» Data relating to historical levels and loadings of PCBs and PBDEs to the Strait
of Georgia are being assembled and reviewed. The final data will beincorporated in a georeferenced database for subsequent addition, mappingand analysis.
Data Review and Assembly
EVolution of the Project
Publication by Ross of work showing localkiller whales to be the "most contaminated marine mammalson earth"
et al.
Interest in the issue grows. In particular, the possibility ofelucidating the relative importance of sources and transferto higher trophic levels.
SETAC PNW Chapter hosts an excellent workshop at U of WFriday Harbor Lab with the intent of setting the foundation fora model of PCBs in Puget Sound and Georgia Strait.
Much momentum, but no available funding.
Through the Georgia Basin Action Plan, funding is secured forboth atmospheric deposition studies and mass balance/modelling work in Georgia Strait. Workshop was held inDecember 2003 to develop partnerships in BC.
Photo by Graeme Ellis
2004 First year of data assembly/collection commences.
2008 End of Program
2000
2002
2003
Point-Source Discharges
Point-source discharges, including stormwater runoff, leaching from landfills, andindustrial and wastewater effluents all potentially contribute to the PCB and PBDEloading to the Strait of Georgia.
:Municipal wastewater effluent characterization programs were undertaken incollaboration with the Greater Vancouver Regional District (Vancouver) and theCapital Regional District (Victoria) with analysis by high-res GC/MS
» the Greater Vancouver Regional District is conducting retrospectiveanalyses of collected in 1996 for PBDE congeners to examine thetime-trend in loadings
Source identification and continued effluent characterization toestimate loadings
2004-2005»
2 0 0 5 +»
While regulatory bans and voluntary disuse of PCBs in British Columbia andWashington State have resulted in greatly decreased environmental concentrations,there is still cause for concern in some areas. For example, in the Strait of Georgiahigh PCB concentrations have been measured in killer whales, resident seals andreturning salmonids. PBDEs are similarly persistent and bioaccumulative, andunlike PCBs, their discharge remains relatively uncontrolled. We have embarked ona program to study the loading and fate of PCBs and PBDEs to the Georgia Basin.Through a combination of direct measurements and modelling we plan to develop acomprehensive picture of the loading, movement and fate of these contaminants inthe region.
The presentation here outlines some recent and proposed activities related to theproject.
Introduction
Understanding the Sources and Fate of PCBs and PBDEs in the Georgia BasinPatrick Shaw , Peter Ross , Sophia Johannessen , Robie Macdonald , Colm Condon , Frank Gobas
1 2 2 2 3 3
1 2 3Environment Canada, Vancouver, BC; Institute of Ocean Sciences, Sidney, BC; Simon Fraser University, Burnaby, BC
AcknowledgementsFunding is provided through the GeorgiaBasin Action Plan, Environment Canada.Special thanks to staff of both theCapital Regional District in Victoria and theGreater Vancouver Regional District in Vancouver
Photo by Peter Ross
Photo by Gail Moyle
