2,000

2,500

3,000

3,500

Average Con

centration

 (SWAC)

(ug/kg)

Example of Incremental Reduction and Minimal Change in Benzo(a)pyrene Equivalent (BaP Eq) Concentrations

RM 4.3 to 4.8 EastPortland Harbor

Potential RALs (ug/kg):

20,000 8,00015,000 4,000 4001,500

0

500

1,000

1,500

0 5 10 15 20 25 30 35 40 45

Surface Weighted 

Area of Active Remediation (acres) Privileged and Confidential

Background = 21.5 ug/kg

Tribal Fisher PRG (10‐6) = 423 ug/kg

10,000

12,000

14,000

16,000

18,000

20,000

oncentration

 (SWAC)

Example of Incremental Reduction and Minimal Change in Benzo(a)pyrene Equivalent (BaP Eq) Concentrations

River Mile 6.0 to 6.5 WestPortland Harbor

Potential RALs (ug/kg): 20,000 8,00015,000 4,000 4001,500

0

2,000

4,000

6,000

8,000

0 2 4 6 8 10 12 14 16

Surface Weighted Average Co

(ug/kg)

Area of Active Remediation (acres) Privileged and ConfidentialPrivileged and Confidential

Tribal Fisher PRG (10‐6) = 423 ug/kg

Privileged and Confidential

20000 15000 8000 4000 1500 400

Benzo(a)pyrene EquivalentRemedial Action Level (ug/kg)

0

50

100

150

200

250

300

350

400

450

500Se

dim

ent M

anag

emen

t Are

as (A

cres

)Sediment Management Areas

within the Portland Harborfor each potential

Benzo(a)pyrene EquivalentRemedial Action Level

Privileged and Confidential

RM-8

RM-2

RM-3

RM-4

RM-7

RM-6

RM-1

RM-5

LEGENDPotential Benzo(a)pyrene Equivalent RALs

400 ug/kg

1,500 ug/kg

4,000 ug/kg

8,000 ug/kg

15,000 ug/kg

20,000 ug/kg

All Other Data

COE Navigation Channel

1/10th River Mile (RM)

Sediment Cap Boundary

1,250 0 1,250 2,500

1 inch = 2,500 feet

MAP NOTES:

RM-8

RM-7

RM-9

RM-6

RM-10RM-11 RM-12

RM 15

RM 10

RM 0

RM 5

Overview

DRAFT

Projection: Oregon State Plane NorthDatum: North American Datum of 1983Date: July 26, 20111. Aerial photo taken by METRO in 2010

Willamette RiverPortland, Oregon

Potential Areas of Active RemediationBenzo(a)pyrene Equivalent

Surface Sediment

Portland Harbor

River Mile 1.0 to 12.0

20000 15000 8000 4000 1500 400

Benzo(a)pyrene EquivalentRemedial Action Level (ug/kg)

0

50

100

150

200

250

300

350

400

450

500Se

dim

ent M

anag

emen

t Are

as (A

cres

)Sediment Management Areaswithin the Portland Harbor*

for each potentialBenzo(a)pyrene Equivalent

Remedial Action Level

*Areas within the federal navigation channel are

excluded from this analysis.

Privileged and Confidential

RM-8

RM-2

RM-3

RM-4

RM-7

RM-6

RM-1

RM-5

LEGENDPotential Benzo(a)pyrene Equivalent RALs

400 ug/kg

1,500 ug/kg

4,000 ug/kg

8,000 ug/kg

15,000 ug/kg

20,000 ug/kg

All Other Data

COE Navigation Channel

1/10th River Mile (RM)

Sediment Cap Boundary

1,250 0 1,250 2,500

1 inch = 2,500 feet

MAP NOTES:

RM-8

RM-7

RM-9

RM-6

RM-10RM-11 RM-12

RM 15

RM 10

RM 0

RM 5

Overview

DRAFT

Projection: Oregon State Plane NorthDatum: North American Datum of 1983Date: July 26, 20111. Aerial photo taken by METRO in 2010

Willamette RiverPortland, Oregon

Potential Areas of Active RemediationBenzo(a)pyrene Equivalent

Surface Sediment

Portland Harbor

River Mile 1.0 to 12.0

0.01 0.1 1 10 100 1,000 10,000 100,000 1,000,000

BaP Eq (ug/kg)

0.01

0.1

1

10

100

1000

10000

100000

1000000To

tal B

aP (u

g/kg

)

LEGENDND BaP and ND BaP EqDetect BaP and ND BaP EqND BaP and Detect BaP EqDetect BaP and Detect BaP Eq

Power Regression of Detected Concentrations

Equation: ln(Y) = 0.985 * ln(X) + 0.440Number of data points used = 1882Coef of determination, R-squared = 0.999

Benzo(a)pyrene (BaP) vs.BaP Equivalent (BaP Eq)

in Surface Sediment

Portland Harbor

NoteND = Non-DetectHollow diamond indicates analyte was not detected above reporting detection limit.

Surface sediments are defined as samples witha starting depth of 0 centimeters (cm) and an end depth of less than or equal to 40 cm.

Scatter plots generated from the Lower Willamette Group's database entitled:Portland Harbor RI/FS Feasibility Study Sediment Database (March 2011)

Date Modified: June 2011