1

Guadalupe Small Guadalupe Small Tributaries Loads StudyTributaries Loads Study

WYs 2003-06WYs 2003-06(PCBs and PBDEs)(PCBs and PBDEs)

John Oram and Lester McKeeJohn Oram and Lester McKee

Sources Pathways and Loadings WorkgroupSources Pathways and Loadings Workgroup

November 13November 13thth 2006 2006San Francisco Estuary Institute

Item #2

2

HistoryHistory

2000 – 2002: Study design and location developed and recommended by 2000 – 2002: Study design and location developed and recommended by the Sources Pathways and Loadings Workgroup (SPLWG) the Sources Pathways and Loadings Workgroup (SPLWG) of the Regional Monitoring Program for Trace Substances of the Regional Monitoring Program for Trace Substances (RMP)(RMP)

WY 2003:WY 2003: CEP ($150k)CEP ($150k)

WY 2004:WY 2004: RMP and CEP ($50k+75k)RMP and CEP ($50k+75k)

WY 2005:WY 2005: RMP, USACE/SCVWD, SCVURPPP ($50k + $100k + $23k)RMP, USACE/SCVWD, SCVURPPP ($50k + $100k + $23k)

WY 2006: WY 2006: RMP, USACE/SCVWD ($50k + $78k)RMP, USACE/SCVWD ($50k + $78k)

San Francisco Estuary Institute

Item #2

3

Location Location MapMap

San Francisco Estuary Institute

4

LocationLocationItem #2

5

LocationLocationItem #2

6

Highest we’veobserved

Item #2

7

SamplingSamplingItem #2

8

SamplingSampling

9

SamplingSamplingItem #2

10

WY 2006 Field TeamWY 2006 Field Team

51%

Samples collectedoutside of work time

Lester McKeeLester McKee Jennifer HuntJennifer Hunt Sarah PearceSarah Pearce Nicole DavidNicole David Seth ShonkoffSeth Shonkoff Ben GreenfieldBen Greenfield Jon LeatherbarrowJon Leatherbarrow John Oram John Oram Rainer HoenickeRainer Hoenicke Amy FranzAmy Franz Carry AustinCarry Austin Paul AmatoPaul Amato

Item #2

San Francisco Estuary Institute

11

TurbidityTurbidityItem #2

12

Turbidity-SSC RegressionTurbidity-SSC Regression

San Francisco Estuary Institute

Item #2

13

Suspended Sediment ConcentrationSuspended Sediment Concentration

San Francisco Estuary Institute

Item #2

14

Water and Suspended Water and Suspended SedimentSediment

020406080

100120

2003 2004 2005 2006*

Water Year

Dis

char

ge

(Mm

3)

02,0004,0006,0008,000

10,00012,00014,000

2003 2004 2005 2006*

Water Year

Su

spen

ded

Sed

imen

t (m

etri

c t)

San Francisco Estuary Institute

111% 97% 133%

223%Historic variation = 5 – 434%

Item #2

15

Flood Return IntervalFlood Return IntervalItem #2