dioxin sources, loadings, and inventory data for san francisco bay rmp technical review committee...
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Dioxin Sources, Loadings, and Inventory Data for San Francisco Bay
RMP Technical Review Committee MeetingMarch 18th, 2008
Draft Data – Do not cite or quote
Past and Projected Dioxin and Furan Emissions in the US
(Peek et al 2002)
Draft Data – Do not cite or quote
Sources of Dioxins and Furan Emissions in the San Francisco Bay Area
g TEQ/year
(BAAQMD 2002)
Draft Data – Do not cite or quote
Stormwater is the Dominant Pathway
High uncertainty due to lack of data
Draft Data – Do not cite or quote
Local Watershed/Stormwater Data
Wenning et al. 1999 and SFRWQCB 1997
1995-1996 wet season • Runoff from 2 storm
events at 13 outfalls in Bay Area
• Hourly sampling of storm drains from 2 sites (Oakland and Benicia) during one storm event
• High variability in dioxin concentrations
Draft Data – Do not cite or quote
Wenning et al. 1999Draft Data – Do not
cite or quote
Direct Atmospheric Deposition Data
Based on limited BAAQMD data set?
California Ambient Dioxin Air Monitoring Program
• Administered by CARB • Data from December 2002-2004/2005• Ambient monitoring for dioxins and dioxin-like
compounds at multiple locations statewide• Focuses on urban areas• 5 sites in SF Bay area• Identification of potential sources• Direct deposition data?
Draft Data – Do not cite or quote
Dioxins in Ambient Air
Patterns were similar among sites
Typical Congener Profiles
California Ambient Dioxin Air Monitoring Program Data Analysis, Draft Report by Sonoma Technology, Inc, February 2008
Dioxins Furans
Draft Data – Do not cite or quote
Dioxins in Ambient Air
Draft Data – Do not cite or quote
Municipal Effluent Data
Draft Data – Do not cite or quote
Municipal Effluent Data
Draft Data – Do not cite or quote
Petroleum Refinery Effluent Loading Data
SFRWQCB dataDraft Data – Do not cite or quote
Central Valley Loading Data
2002-2003: 2 wet season, 2 dry season events(SFEI 2003)Draft Data – Do not
cite or quote
Draft Data – Do not cite or quote
Sources of Uncertainty in Loading Estimates
• Limited data• Chemical analysis• Congeners below detection limits• Extrapolation to other facilities, tributaries, etc.• Erosion of buried sediment
2000 NOAA EMAP Sediment data
• 56 sites throughout the Bay• EPA: Concentrations were ‘quite low as
compared to other bays and harbors near large
metropolitan areas’.• Dominated by higher chlorinated congeners• Many lower chlorinated congeners < MDL
Dioxin in Cormorant Eggs
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
2001 2002 2003 2004 2005 2006 2007
Year of Collection
Dio
xn a
nd
Fu
ran
TE
Qs
ng
/g l
ipid
Don Edwards
Richmond Bridge
Wheeler Island
Matrix No. of Samples
Cost per Sample
Total Comment
Fish 20 $700 $14,000 Conduct in 2009 as part of RMP triennial sportfish monitoring.
Sediment – surface
47 $700 $32,900 Collect in 2008 as part of the RMP S&T sediment cruise
Sediment - cores
50 $700 $35,000 Core samples were collected in 2006. Analyze 4-5 sections from 11 Bay cores
Stormwater 35 $700 $24,500 In 2009, 15 small tributary samples. In 2010, 10 Mallard Island samples In 2011, 10 Guadalupe River samples.
Surface water
10 $700 $7000 Collect in 2008 as part of the annual RMP S&T water cruise.
Proposed Dioxin Sampling Plan
Draft Data – Do not cite or quote