San Francisco Estuary Institute

Small Tributaries Loading Study #2Zone 4 Line A, Cabot Blvd. Hayward

Year 2 – Draft Data To-date

Sources Pathways and Sources Pathways and Loadings WorkgroupLoadings Workgroup

December 8December 8thth 2008 2008

Alicia Gilbreath and Lester McKee

Item # 2b

2

Sep Nov Jan Mar May Jul

Cum

ulat

ive

Pre

cipi

tatio

n (m

m)

0

50

100

150

200

250

300

350

WY 2007 at 541AWY 2007 at Z4LA

Sep Nov Jan Mar May Jul

Cum

ulat

ive

Pre

cipi

tatio

n (m

m)

0

50

100

150

200

250

300

350

WY 2007 at 541AWY 2007 Samples Collected

Sep Nov Jan Mar May Jul

Cu

mu

lativ

e P

reci

pita

tion

(m

m)

0

100

200

300

400

WY 2007 at 541AWY 2008 at 541A

Sep Nov Jan Mar May Jul

Cum

ulat

ive

Pre

cipi

tatio

n (m

m)

0

100

200

300

400

WY 2008 at 541AWY 2008 Samples Collected

Season Data Inventory Item # 2b

San Francisco Estuary Institute

SamplesCollected

FieldDuplicates

DataReceived

Data QAQCChecked

HgT 32 1 22 No

HgD 20 1 11 No

MeHgT 20 1 0 No

MeHgD 20 1 0 No

HgR 9 1 All No

PCBs 32 1 All No

PBDEs 8 1 All No

OC Pesticides (DDT, chlordane, dieldrin) 8 1 All No

PAHs 8 1 All No

Trace Elements (Ag, Al, As, Cd, Cr, Cu, Mn, Ni, Pb, Se, Zn) 20 1 0 No

Fe 16 1 0 No

SSC 100 1 32 No

Organic carbon (DOC, POC) 13 0 13 Yes

San Francisco Estuary Institute

Item # 2b

• HgT range (n=22): 3 – 147 ng/L

WY 2008 data DRAFT and subject to change.

1

10

100

1000

1 10 100 1000 10000

SSC (mg/L)

Hg

T (

ng

/L)

WY 2008 WY 2007

• HgD range (n=11): 1.5 – 2.9 ng/L

• Hg(II)R (n=9): ND – 1.9 pg/L

San Francisco Estuary Institute

Item # 2b

• t-PCB range (n=32): 336 – 102,234 pg/L

WY 2008 data DRAFT and subject to change.

100

1000

10000

100000

1000000

1 10 100 1000 10000

SSC (mg/L)

t-P

CB

s (p

g/L

)

WY 2008 WY 2007

6

Item # 2b

WY 2008 data DRAFT and subject to change.

WY

20

07

WY

20

08

t-PBDEs Min 2,824 1,197(pg/L) Max 141,218 14,970

n= 20 8

Z4L

A-0

1Z

4LA

-02

Z4L

A-0

3Z

4LA

-04

Z4L

A-1

2Z

4LA

-22

Z4L

A-3

0Z

4LA

-40

Z4L

A-4

1Z

4LA

-42

Z4L

A-4

3Z

4LA

-44

Z4L

A-4

5Z

4LA

-47

Z4L

A-5

2Z

4LA

-60

Z4L

A-6

1Z

4LA

-62

Z4L

A-6

3Z

4LA

-160

Z4L

A-1

90Z

4LA

-200

Z4L

A-2

10Z

4LA

-220

Z4L

A-2

30Z

4LA

-230

DU

PZ

4LA

-240

Pe

rcen

t C

ontr

ibut

ion

to t

-PB

DE

s (%

)

0

20

40

60

80

100

BDE 047 BDE 099 BDE 100 BDE 153 BDE 183 BDE 206 BDE 207 BDE 208 BDE 209

WY

20

07

WY

20

08

t-PBDEs Min 2,824 1,197(pg/L) Max 141,218 14,970

n= 20 8

7

SSC (mg/L)

0 200 400 600 800D

OC

(m

g/L

)2

4

6

8

10

12

San Francisco Estuary Institute

Item # 2b

WY 2008 data DRAFT and subject to change.

SSC (mg/L)

0 200 400 600 800

PO

C (

mg

/L)

0

2

4

6

8

10

WY 2007WY 2008

8San Francisco Estuary Institute

Item # 2b

WY 2008 data DRAFT and subject to change.

t-P

AH

s

t-D

DT

s

t-C

hlo

rdan

es

t-H

CH

s

Die

ldri

n

pg/L pg/L pg/L pg/L pg/L

WY 2007 Min 1,373 7,420 3,466 300 711Max 19,668 59,480 16,400 891 4,590n= 7 7 7 7 7

WY 2008 Min 19 408 318 ND 257Max 1,423 3,800 1,891 430 634n= 8 8 8 8 8

9San Francisco Estuary Institute

Item # 2b

• Draft results for Hg and PCBs generally correlate with the first year of data

• Construction delay and few punctuated storms during potential sampling period led to opportunity to collect low-flow samples

• Low-flow data adds robustness to complete dataset