# Appendix C

Sediment and Water Quality

February 2012

### Appendix C, Yaquina River ODMDS Evaluation / EA 

# Appendix C

Sediment and Water Quality

Table of Contents

General

................................ ................................ ................................ ................................ .......... C

- 1

Yaquina Bay and River Federal Navigation Project

................................ ................................ ..... C

- 1

Water Quality

................................ ................................ ................................ ............................ C

- 3

Baseline Sediment Quality

................................ ................................ ................................ ........ C

- 3

2010 Sediment Quality Results and Discussion

................................ ................................ ........ C

- 3

Yaquina Bay Ocean Disposal Sites

................................ ................................ ............................... C

- 9

Disposal Volumes

................................ ................................ ................................ ..................... C

- 9

Sediment Baseline Analysis

................................ ................................ ................................ .... C

- 11

Discussion and Conclusions

................................ ................................ ................................ ........ C

- 25

Refe rences

................................ ................................ ................................ ................................ ... C

- 26

LIST OF FIGURES

Figure C

- 1. Proposed Yaquina North and South Ocean Disposal Sites

................................ ....... C

- 2

Figure C

- 2. Location of Sediment Samples Collected on July 28, 2010

................................ ..... C

- 4

Figure C

- 3. Sediment Sampling Sites, June and August 2008

................................ ................... C

- 13

Figure C

- 4. Mean Grain Size, June 2008

................................ ................................ ................... C

- 14

LIST OF TABLES

Table C

- 1. Physical Grain Size, 2010

................................ ................................ .......................... C

- 5

Table C

- 2. Metals and Total Organic Carbon, 2010

................................ ................................ .... C

- 5

Table C

- 3. Pesticides, 2010

................................ ................................ ................................ .......... C

- 6

Table C

- 4. Polychlorinated Biphenyls (PCBs), 2010

................................ ................................ .. C

- 6

Table C

- 5. Chlorinated Hydrocarbons, 2010

................................ ................................ ............... C

- 6

Table C

- 6. Phthalates, 2010

................................ ................................ ................................ ......... C

- 7

Table C

- 7. Phenols, 2010

................................ ................................ ................................ ............. C

- 7

Table C

- 8. Miscellaneous Extractables, 2010

................................ ................................ .............. C

- 7

Table C

- 9. PAHs

- Low Molecular Weight Analytes, 2010

................................ ........................ C

- 8

Table C

- 10. PAHs

- High Molecular Weight Analytes, 2010

................................ ..................... C

- 8

Table C

- 11. Total Petroleum Hydrocarbons, 201 0

................................ ................................ ...... C

- 8

Table C

- 12. Butyltins, 2010

................................ ................................ ................................ ......... C

- 9

Table C

- 13. Volume of Dredged Material Placed at Yaquina Bay Ocean Disposal Sites

......... C

- 10

Table C

- 14. Results for Grain Size, Total Solids, and TOC, 2008

................................ ............ C

- 16

Table C

- 15 . Results for Metals, 2008 (ppm)

................................ ................................ .............. C

- 17

Table C

- 16. Results for Organotin, 2008 (μg/L)

................................ ................................ ........ C

- 19

Table C

- 17. Results for SVOCs, 2008 (μg/kg)

................................ ................................ .......... C

- 20

Table C

- 18. Results for PCBs, 2008 (μg/kg)

................................ ................................ ............. C

- 23

Table C

- 19. Results for Pesticides, 2008 (μg/kg)

................................ ................................ ...... C

- 24

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 1 

# Appendix C

Sediment and Water Quality

G ENERAL

The Marine Protection, Research and Sanctuaries Act (MPRSA) require s that four general criteria and

eleven specific factors be addressed during the designation process (40 CFR 228.5 and 228.6).

General criterion (b) and specific factors 4, 9, and 10 of 40 CFR 228.5 and 228.6 require sediment and

water quality analyses indicative of both the dredging areas and disposal sites be reported . Dredged

materials placed in ocean dredged material disposal site s ( ODMDS ) along the Oregon C oast usually

consist of medi um to fine sands taken from entrance bar shoals and deposited on slightly finer

continental shelf sands. The bulk of the sediments dredged at the U.S. Army Corps of Engineers

(USACE) Yaquina federal navigation project and placed in the ocean disposal sites are similar in grain

size to those at the disposal site s . Because of their coarse nature, the presence of strong hydraulic

regimes

, similarity to ODMDS sediments, and isolation from known or historical contaminant sources,

dredged sands from entranc e bar shoals are often deemed acceptable for ocean d isposal without further

testing ( 40 CFR 227.13(b) )

. The use of Sediment Evaluation Framework ( SEF ) screening levels

provides an additional safeguard for this material. Data for channel sands and fines f or the navigation

project and t he proposed North and South ocean disposal sites (Figure C

- 1) are presented in this

appendix.

The general criteria and specific factors of the MPRSA have been interpreted as 27 different “ areas of

consideration ” that cover t he proposed ocean disposal sites and the dredged material they receive.

These areas of consideration are listed in a conflict matrix (see Evaluation S tudy /EA report ) that is

used to evaluate each disposal site on its compliance with the requirements for d isposal site

designation. The results of the matrix are compared and used to select the best ocean disposal site(s)

. The areas of consideration involving sediment quality include :

1. Physical and chemical sediment compatibility.

2. Water column chemist ry and physical characteristics.

3. Influence of past disposal.

4. Size and shape of the disposal site.

5. Size of 

## the buffer zone.

6. Degraded areas

. 7. Potential for c umulative e ffects

.

Th is information is provided in this appendix.



# Y AQUINA 

# B AY AND 

# R IVER 

# F EDERAL 

# N AVIGATION 

# P ROJECT

The federal navigation project at Yaquina includes an entrance channel that is 400

- feet wide and 40

- feet deep that runs from river mile ( RM )

- 1.2 to RM 0.0. From RM 0.0, the authorized channel is 30

- feet deep and 3 00

- feet wide to the turning basin at McClean Point ( RM 2.0 )

. The turning basin is

authorized at 30

- feet deep, 900 to 1,200

- feet wide

, and 1,400

- feet long

. The authorized channel from

the turning basin to RM 4.0 is 18

- feet deep and 200

- feet wide ; this channel is currently not

maintained

.

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 2 Figure C

- 1 . Proposed Yaquina North and South Ocean Disposal Sites

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 3 The federal project at Yaquina includes a small

, 10

- foot deep boat basin ( “ north basin ” ) at Newport.

East of the H ighway 101 bridge is the South Beach m arina with an authorized access channel that is

10

- feet deep, 100

- feet wide, and 2,035

- feet long. The project in the Yaqui na River consists of a

channel that is generally 150

- feet wide and 1 0

- feet deep from about RM 4.0 to RM 14.0. At Toledo,

the channel widens to 200 feet and extends into Depot Slough. A turning basin at RM 14.0 that is

350

- feet wide and 500

- feet long completes the authorized project.

Sediment testing in Yaquina Bay and river for the federal navi gation p rojects has been done in 1980,

1986, 1990, 1991, 1995, 2000, 2005 , and 2010 for the Yaquina Bay and River federal navigation

project. Th e Sediment Evaluation Framework (SEF 2009) guidance manual used by federal and state

permitting agencies in Oregon for evaluating the potential for unconfined in

- water disposal of dredge

material recomm ends physical and chemical testing of the sediments found in the federal navigation

project area every 7 to 10 years

, depending on location

. However, the USACE has chosen t o collect

sediments and analyze their physical and chemical properties typically on a 5

- year schedule or as

specific sediment quality issues are raised. Information and specific data regarding these sediment

quality evaluations are maintained and availabl e at the USACE Portland District. 1 

### For the most recent

sediment sampling effort in 2010, specific sample locations and physical / chemical data is provided in

detail in this appendix.



## Water Quality

Water quality in nearshore waters at Yaquina Bay is expected to be typical for seawater in the Pacific

Ocean . A large data set regarding the impact of dredged material disposal on the water column was

collected in the early 1980s. In June 1980 , the U

. S

. Geological Survey collected samples from 14

stat ions offshore at Yaquina Bay and conducted elutriate tests (see Fuhrer and Rinella 1983)

. All

parameters measured were well within normal ranges expected for nearshore ocean waters and met the

state’s water quality standards. Since then , focus has shifted away from the water column pathway to

one having more direct contact with bulk or suspended sediment. Currently, w ater co lumn tests are

rarely performed unless there is a “reason to believe” a water column release may occur.



## Baseline Sediment Quality

The Corps conducted p hysical and chemical analyses of sediment samples from Yaquina Bay and

South Beach m arina in 1980, 1986, 1990, 1991, 1995, 2000 , 2005 , and 2010 ). Potential sources of

contaminants to the f

ederal navigation c hannel are logging , wood processing, fish processing and

urban runoff. From the USACE sediment sampling studies, the sediment is typically below screening

levels (if they were identified at that time) for contaminants of concern. Consequently, sediment has

been accep tabl e for in

- water ocean disposal.



## 20 10 Sediment Quality Results and Discussion

The latest sediment sampling effort at Yaquina Bay occurred on July 28, 2010 (USACE September

2010). Th e evaluation was conducted following procedures set forth in the SEF ( 2009)

, which is

consistent with the federal guidance in the Ocean Testing Manual (USACE and EPA 1991) and Inland

Testing Manual (EPA and USACE 1998)

. The 2009 SEF was developed jointly with regional federal

and state agencies to address environmental issues associated with dredging and sediment

management.

1 

### All sediment analysis reports conducted by the USACE for the federal navigation project can be found at

http://www.nwp.usace.army.mil/environment/sediment.asp

.

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 4 Eight box core grab samples and one gravity core sample were collected in 2010 : two from the

entrance channel, four from the federal navigation channel, and three from South Beach m arina

(Figure C

- 2 )

. Ba sed upon grain size and sample location 5 out of the 9 samples were subjected to

chemical analyses. Results are discussed below.

Figure C

- 2 . Location of Sediment Samples Collected on July 28, 2010

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 5 Physical Grain Size (ASTM D 422) . Nine sediment samples were submitted for physical analyses with

data presented in Table C

- 1. The overall mean grain size for the project is 72% sand, with a mean

grain size of 94% sand for the federal navigation channel (entrance to turning basin) and 45% sand

within South Beach m arina.

Table C

- 1 . Physical Grain Size , 2010

Location Sample ID Gravel Sand Fines

%

Entrance 072810YAQB

- BC

- 01 0 99.1 1

072810YAQB

- BC

- 02 0 99 0.9

River ( navigation channel ) 072810YAQB

- BC

- 03 0 98.7 1.3

072810YAQB

- BC

- 04 0 93.9 6

072810YAQB

- BC

- 05 0 89.3 10.6

072810YAQB

- GC

- 07 0 85.4 14.7

South Beach Marina 072810YAQB

- BC

- 08 0.2 63.1 36.8

072810YAQB

- BC

- 09 0.4 20.4 79.3

072810YAQB

- BC

- 10 0.7 15.6 83.8



### Metals (EPA method 6020/7471), Total Organic Carbon (EPA method 9060) . Five sediment samples

were submitted for metals and total organic carbon ( TOC ) testing, with data presented in Table C

- 2.

Total organic carbon averaged 2.36% and had a range of 0.774% to 3.63%. Levels of metals were

consistent with historical values and did not approach the SEF screening levels (SLs)

.

Table C

- 2

. Metals and Total Organic Carbon , 2010

Sample I.D. As Sb Cd Cr Cu Pb Hg Ni Ag Zn TOC

m g/kg (ppm) %

072810YAQB

- BC

- 05 <7 <0.3 <0.3 28.2 6.3 4 <0.03 20 <0.4 40 0.774

072810YAQB

- GC

- 07 <7 <0.3 <0.3 28.9 8.7 4 <0.03 22 <0.4 39 2.03

072810YAQB

- BC

- 08 <8 <0.3 0.4 36.6 14.9 6 <0.04 28 <0.5 56 2.35

072810YAQB

- BC

- 09 <10 <0.5 0.9 52 32.4 10 0.06 42 <0.7 97 3.02

072810YAQB

- BC

- 10 <10 <0.5 1.2 57 39.8 11 0.05 43 <0.7 111 3.63

Marine Screening L evel (SL) 57 150 5.1 260 390 450 0.41

-- 6.1 410

--

-- = SL not established.

(<) = Non

- detect (ND) at the value listed (MRL).



### Pesticides/PCBs (EPA method 8081/8082) . Five sediment samples were submitted for pesticides/

polychlorinated biphenyls (PCBs), with data presented in Tables C

- 3 and C

- 4. No pesticides or PCBs

were detected in any of the samples above the laboratory method reporting limits. All method

reporting limits (M R Ls) were well below the SEF SLs

.

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 6 Table C

- 3 . Pesticides , 2010

Sample I.D. 4,4’

-

DDD 4,4’

-

DDE 4,4’

-

DDT Aldrin Chlordane Dieldrin Heptachlor gamma

BHC Alpha Gamma*

ug/kg (ppb)

072810YAQB

- BC

- 05 <1.9 <1.9 <1.9 11Y <0.96 <0.96 <1.9 <0.96 <0.96

072810YAQB

- GC

- 07 <2.0 <2.0 <2.0 <0.98 <0.98 <0.98 <2.0 <0.98 <0.98

072810YAQB

- BC

- 08 <1.9 <1.9 <1.9 <0.97 <0.97 <0.97 <1.9 <0.97 <0.97

072810YAQB

- BC

- 09 <2.0 <2.0 <2.0 <0.98 <0.98 <0.98 <2.0 <0.98 <0.98

072810YAQB

- BC

- 10 <2.0 <2.0 <2.0 <0.98 <0.98 <0.98 <2.0 <0.98 <0.98

Marine SL 16 9.0 34

-- -- -- -- --

* Gamma

- chlordane may also be called beta

- chlordane or trans

- chlordane

-- SL not established.

(<) = Non

- detect (ND) at the value listed (MRL).

Y = The analyte was not detected at or above the reported concentration. The MRL was raised due to

chromatographic interference.



### Table C

- 4

. Polychlorinated Biphenyls (PCBs) , 2010

Sample I.D. Aroclor

1016 Aroclor

1221 Aroclor

1232 Aroclor

1242 Aroclor

1248 Aroclor

1254 Aroclor

1260 Total

ug/kg (ppb)

072810YAQB

- BC

- 05 <9.5 <9.5 <9.5 <9.5 <9.5 <9.5 <9.5 <9.5

072810YAQB

- GC

- 07 <9.9 <9.9 <9.9 <9.9 <12Y 26 <9.9 26Y

072810YAQB

- BC

- 08 <9.7 <9.7 <9.7 <9.7 <9.7 <9.7 <9.7 <9.7

072810YAQB

- BC

- 09 <9.9 <9.9 <9.9 <9.9 <9.9 <9.9 <9.9 <9.9

072810YAQB

- BC

- 10 <9.8 <9.8 <9.8 <9.8 <9.8 <9.8 <9.8 <9.8

Marine SL 130

Symbol (<) = Non

- detect (ND) at the value listed (MRL).

Y = The analyte was not detected at or above the reported concentration. The MRL was raised due to

chromatographic interference.



### Chlorinated Hydrocarbons, Phenols, Phthalates and Miscellaneous Extractables (EPA method 8270)

. Five sediment samples were submitted for chlorinated hydrocarbons, phenols, phthalate s and

miscellaneous extractables, with data presented in Tables C

- 5 to C

- 8. No chlorinated hydrocarbons or

miscellaneous extractables were detected above MRLs in any of the samples. Bis(2

- ethylhexyl)

phthalate and phenol were detected in all samples , but below SEF marine SLs

. O nly o ne s ample

contained any other detected organic contaminant with an estimated concentration of 15 parts per

billion ( ppb ) 4

- methyl phenol, which is well below the SEF marine SL of 670 ppb. All M R Ls were

well below SEF SLs

.

Table C

- 5 . Chlorinated Hydrocarbons , 2010

Sample I.D. Hexachlorobenzene 1,2,4

- Trichlorobenzene 1,2

- Dichlorobenzene 1,4

- Dichlorobenzene

ug/kg (ppb)

072810YAQB

- BC

- 05 <0.96 <19 <19 <19

072810YAQB

- GC

- 07 <1.7Y <20 <20 <20

072810YAQB

- BC

- 08 <0.97 <20 <20 <20

072810YAQB

- BC

- 09 <0.98 <20 <20 <20

072810YAQB

- BC

- 10 <0.98 <20 <20 <20

Marine SL 22 31 35 110

Symbol (<) = Non

- detect (ND) at the value listed (MRL).

Y = The analyte was not detected at or above the reported concentration. The MRL was raised due to chromatographic

interference.

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 7 Table C

- 6 . Phthalates , 2010

Sample I.D. bis(2

- Ethylhexyl)

phthalate Butyl

- benzyl

phthalate Di

- n

- butyl

phthalate Di

- n

- octyl

phthalate Diethyl

phthalate Dimethyl

phthalate

ug/kg (ppb)

072810YAQB

- BC

- 05 16J <19 <19 <19 <19 <19

072810YAQB

- GC

- 07 1,300 <20 <20 <20 <20 <20

072810YAQB

- BC

- 08 48 <20 <20 <20 <20 <20

072810YAQB

- BC

- 09 80 <20 <20 <20 <20 <20

072810YAQB

- BC

- 10 92 <20 <20 <20 <20 <20

Marine SL 1,300 63 1,400 6,200 200 71

Symbol (<) = Non

- detect (ND) at the value listed (MRL).

J= The estimated concentration is less than the established MRL.



### Table C

- 7

. Phenols , 2010

Sample I.D. Phenol 2

- Methyl

phenol Pentachloro

phenol 4

- Methyl

phenol 2,4

- Dimethyl

phenol

ug/kg (ppb)

072810YAQB

- BC

- 05 36 <19 <97 15J <19

072810YAQB

- GC

- 07 29 <20 <99 <20 <20

072810YAQB

- BC

- 08 33 <20 <99 <20 <20

072810YAQB

- BC

- 09 36 <20 <98 <20 <20

072810YAQB

- BC

- 10 39 <20 <99 <20 <20

Marine SL 420 63 400 670 29

Symbol (<) = Non

- detect (ND) at the value listed (MRL).

J= The estimated concentration is less than the established MRL.



### Table C

- 8

. Miscellaneous Extractables , 2010

Sample I.D. Hexachloro

butadiene Benzoic

Acid Benzyl

Alcohol Dibenzofuran N

- Nitroso

diphenylamine

ug/kg (ppb)

072810YAQB

- BC

- 05 <0.96 <190 <19 <19 <19

072810YAQB

- GC

- 07 <0.98 <200 <20 <20 <20

072810YAQB

- BC

- 08 <0.97 <200 <20 <20 <20

072810YAQB

- BC

- 09 <0.98 <200 <20 <20 <20

072810YAQB

- BC

- 10 <0.98 <200 <20 <20 <20

Marine SL 11 650 57 540 28

Symbol (<) = Non

- detect (ND) at the value listed (MRL).



### Polynuclear Aromatic Hydrocarbons (EPA method 8270C)

. Five sediment samples were submitted

for low and high molecular weight p olynuclear a romatic h ydrocarbons ( PAHs ) , with data presented in

Table s C

- 9 and C

- 10 . Phenanthrene, a low molecular weight PAH

, was detected in very low

concentrations (21

- 46 pbb) in sampl es collected from the South Beach m arina, well below the SEF

marine SL of 1,500 ppb. Several high PAHs were detected in some of the samples. All detected

values and M R Ls were low and well below SEF SLs

.

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 8 Table C

- 9

. PAHs

- Low Molecular Weight Analytes , 2010

Sample I.D. Acenaph

thene Acenaph

thylene Anthracene Fluorene 2

- Methyl

naphthalene Naphthalene Phen

anthrene Total Low

PAHs

ug/kg (ppb)

072810YAQB

- BC

- 05 <19 <19 <19 <19 <19 <19 <19 <19

072810YAQB

- GC

- 07 <20 <20 <20 <20 <20 <20 <20 <20

072810YAQB

- BC

- 08 <20 <20 <20 <20 <20 <20 46 46

072810YAQB

- BC

- 09 <20 <20 <20 <20 <20 <20 21 21

072810YAQB

- BC

- 10 <20 <20 <20 <20 <20 <20 36 36

Marine SL 500 560 960 540 670 2,100 1,500 5,200

Symbol (<) = Non

- detect (ND) at the value listed (MRL)



### Table C

- 10 . PAHs

- High Molecular Weight Analytes , 2010

Sample I.D. Benzo(a)

-

anthracene Benzo(b)

fluor

anthene Benzo(k)

fluor

anthene Benzo

-

(g,h,i)

- perylene Chry

sene Pyrene Benzo(a)

-

pyrene Dibenz(a,h)

-

anthracene Indeno

-

(1,2,3

- cd)

-

pyrene Fluor

anthene Total

High

PAHs

ug/kg (ppb)

072810YAQB

BC

- 05 <19 <19 <19 <19 <19 <19 <19 <19 <19 <19 <19

072810YAQB

GC

- 07 <20 <20 <20 <20 <20 22 <20 <20 <20 27 49

072810YAQB

BC

- 08 14J 20 20 <20 41 74 <20 < 20 <20 110 279

072810YAQB

BC

- 09 15J 18J 18J <20 42 65 10J <20 <20 82 250

072810YAQB

BC

- 10 21 30 30 <20 69 82 18J <20 <20 110 360

Marine SL 1,300 b + k = 3200 670 1,400 2,600 1,600 230 600 1,700 12,000

Symbol (<) = Non

- detect (ND) at the value listed (MRL).

J= The estimated concentration is less than the established MRL.



### Total Petroleum Hydrocarbons (NWTPH Method)

. Five sediment samples were submitted for

hydrocarbon identification. Data is presented in Table C

- 11. No gasoline

- , diesel

- , or residual

- range

organics were detected in any of the samples.

Table C

- 11 . Total Petroleum Hydrocarbons , 2010

Sample I.D. Gasoline Range

Organics Diesel Range

Organics Residual Range

Organics

mg/kg (ppm)

072810YAQB

- BC

- 05 <20 <50 <100

072810YAQB

- GC

- 07 <20 <50 <100

072810YAQB

- BC

- 08 <20 <50 <100

072810YAQB

- BC

- 09 <26 <66 <130

072810YAQB

- BC

- 10 <28 <69 <140

Symbol (<) = Non

- detect (ND) at the value listed (MRL).



### Butyl tins (TBT) (Krone 1998 SIM Method)

. One sediment sample collected from the South Beach

m arina was submitted for TBT analysis and was found to be non

- detect for butyltin ions. Data is

presented in Table C

- 12

.

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 9 Table C

- 12 . Butyltins , 2010

Sample I.D. Tributyltin Dibut yltin Monobutyltin

ug/kg (ppb)

072810YAQB

- BC

- 09 <3.6 <5.4 <3.8

Symbol (<) = Non

- detect (ND) at the value listed (MRL).



### In conclusion, the s ediment represented by samples collected during th e 2010 sampling event meet s

the guidelines established in the S EF (2009) for unconfined in

- water placement without further

characterization.



# Y AQUINA 

# B AY 

# O CEAN 

# D ISPOSAL 

# S ITES



## Disposal Volumes

The USACE historically used the general area offshore of Yaquina Bay for dredged material d isposal.

The volume of dredged material placed at Yaquina Bay ocean disposal sites since 1928 is summarized

in Table C

- 13. In 1977, an Interim ODMDS offshore of Yaquina (see Figure C

- 1) received EPA

designation and was used by the USACE for dredged mater ial disposal after 1977 and prior to 1986.

However, because of increased mounding in the Interim Site and its potential adverse effect on

navigation safety, the USACE selected an alternate ODMDS under the authority of Section 103 of the

MPRSA . This nears hore Section 103 Site (see Figure C

- 1) was used for disposal from 1986 to 2000.

Dredged material continued to accumulate in the nearshore Section 103 Site. In 2001

, a n evaluation

was conducted by the USACE and EPA to examine conditions at Yaquina and new locations for ocean

disposal further offshore from the entrance ( USACE and EPA 2001 ). The recommended areas from

that study are the proposed North and South ocean disposal sites. T hese disposal sites are currently

used under authorization of Sect ion 103 of the MPRSA. Since October 2000, only the North ODMDS

has been used by the USACE for dredged material disposal (see “drop site” in Figure C

- 1). The South

ODMDS has never been utilized for disposal; due to prevailing northwest swell , the North OD MDS

has been the preferred choice by dredge operators.

The annual dredging and disposal period for the Yaquina project typically occurs in April through

October. T he Yaquina project has two main shoaling areas. The sediment dredged from the entrance

cha nnel and associated bar crossing accounts for 95% of the annual dredging volume. The interior 30

- foot channel (and turning basin) accounts for 5% of the total annual dredging. In its present

configuration, the entrance channel up to the turning basin req uire s annual dredging of up to 370,000

cubic yards (cy) of shoaled sediment (fine

- medium sand with some silt) to maintain the authorized

depth. Up to an additional 25,000 cy of material may be removed from the South Beach Marina

access channel

, and up to 100,000 cy of material may be removed from Depo t Slough every 5

- 8 years.

D redged material is expected to be disposed over a period of 32 days during the dredging period,

which is April through October . Generally, d isposal is expected to occur up to 6 days in April or May,

then from June 15 to October 31.

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 10 Table C

- 13

. Volume of Dredged Material Placed at Yaquina Bay Ocean Disposal Sites

ODMDS Location Year Year Total

(cy) Average

at Site (cy) Total Placed

at Site (cy)

Interim Site 1928

- 1940* 1,040,000

252,379 14,638,036

1941

- 1967* 5,400,000

1968

- 1981* 6,440,000

1982 331,180

1983 453,319

1984 670,773

1985 302,764

Nearshore

Section 103 Site 1986 242,468

310,240 4,653,596 1987 537,843

1988 324,519

1989 333,807

1990 216,696

1991 316,956

1992 321,652

1993 358,407

1994 206,971

1995 393,641

1996 314,636

1997 370,000

1998 351,000

1999 260,000

2000 105,000

North ODMDS 2001 198,284

217,379 2,173,790 2002 179,427

2003 320,455

2004 241,293

2005 282,596

2006 223,150

2007 192,352

2008 175,031

2009 161,678

2010 199,524

Total 21,465,422

*Volumes are approximate

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 11 

## Sediment Baseline Analysis

The following baseline information for the Yaquina ocean disposal sites w as taken from the 2001

Yaquina Bay Ocean Dredged Material Disposal Site Evaluation Study and Environmental Assessment

(USACE and EPA 2001). This information as it pertains t o sediment quality is considered baseline

information because it was collected prior to use of the North ODMDS

. The information is also

relevant to the South ODMDS , however, information collected between 2001 and 2010 from the South

site is considered bas eline information given that the site has never been used by the USACE.

Subsequent to the 2000 sampling at the North and South sites, EPA conducted sediment sampling at

both sites in 2008. The results from the latter sampling are discussed as well.

2000 Baseline Sediment Analysis

The physical data analysis at the Yaquina ocean disposal sites conducted in 2001 show ed that the sites

ha d fine to medium marine sand with very little silts and clays (0 to 6 % )

. The physical properties of

sediments at the ocean disposal sites are similar to the majority of the dredged materials that will be

placed there

. The physical analyses from associated dredging locations in the federal navigation

channel are similar to the physical analyses at the North site p rior in baseline sampling in 2001 and

more recent sampling at the South ocean disposal site for percent of sand, fines and TOC

.

For all the chemistry analyses that were conducted in 2000, which included all chemicals of concern

tested in 2010 (see T ables C

- 1 through C

- 12 ), all results were below screening levels. Total metal

analyses were performed on samples collected in 2000 from the proposed Yaquina North and South

ODMDS

. L ow concentrations were detected for most of the metals and these concentration s were far

below the established screening levels. Analyses for p henol s, p esticides and i nsecticides

, l ow and

high PAH s, c hlorinated h ydrocarbons , and m iscellaneous e xtractables were performed o n samples

collected in 2000 from the proposed North and South ocean disposal sites

. N one of these compounds

were detected. Analyses for p hthalate compounds were performed on samples collected in 2000 t he

proposed Yaquina North and South ocean disposal sites. D is(2

- ethylhexyl) phthalate and diethyl

phthalate were d etected. Concentrations of dis(2

- ethylhexyl) phthalate varied from 3.8 to 6.3 ppb,

which was just above the detection limit of 4.3 ppb , but far below the established screening level of

8,300 ppb. A concentration of 3.8 ppb of diethyl phthalate was detect ed in one sample, which was just

above the detection limit of 3.1 ppb, but far below the established screening level of 1,200 ppb. Given

these results conducted in 2000 for baseline sampling of the North and South site s prior to disposal at

these sites, neither of the sites had any elevated levels of chemicals that rise to a level of concern.

2008 Sediment Analysis

In June 2008, EPA collected sediment samples for physical and chemical analysis using a 0.1 m 2



### Young modifi ed Van Veen grab sampler at the North and South sites (USACE and EPA 2011). The

18 sample locations were selected based on 1999

- 2001 sampling efforts (Figure C

- 3 ) so that direct

comparisons over time could be done . The 2008 survey area size was approxima tely 2.5 square

nautical miles and the surveys occurred in water depths of 110 to 150 feet. Samples were analyzed for

the following: grain size, total solids, TOC, metals, TBT, semivolatile organic compounds (SVOCs),

PCBs, and PAHs. Between October 2000 and 2009 , only the North ODMDS “drop zone ” (see Figure

C

- 1) has been used for disposal

. In 2010 the entire site was used and in 2011 only the south half of the

North Site was utilized for dredged material disposal. T he South ODMDS has never been used for

disposal to date

. Some of the following data tables are divided to show results from the area where

disposal of dredged material has occurred (“North ODMDS drop site”) and from all areas where no

disposal has occurred (“background stations”).

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 12 Physica l Analysis and TOC

. For the North ODMDS drop site, t he results of physical analysis (Table

C

- 14) showed that the sediment collected was primarily medium sand with little variation, ranging

from 97.8% to 99.7% sand

- sized grains (“percent sand”), versus 96.6 % to 99.5% sand at the

background stations. There was higher percent coarse sand at the deepest location (YQ

- 22) and higher

percent very fine sand at the shallowest location (YQ

- 01) . The mean percent sand was essentially the

same at the North drop site s tations (98.6%) as that of the background stations (98.3%). The mean and

median grain sizes were calculated using percentage of grain size. The mean grain sizes at the North

drop site stations were more consistent than those at the background stations, r anging from 0.195

millimeters (mm) to 0.213 mm at the former and from 0.171 mm to 0.308 mm at the latter (Figure

C

- 4 ). The largest grain size (0.308 mm) was collected at the deepest location (YQ

- 22)

.

Total solids were only slightly lower in the North dro p site (mean 79.5%) than the background stations

(mean of 81.1%). The TOC (Table C

- 14) was substantially lower at the North drop site versus the

background [mean 349.2 milligrams per kilogram (mg/kg) versus 513.3 mg/kg], probably due to the

relatively low TOC normally found in Oregon coast river sediments as opposed to the higher organic

carbon normally found in deeper, more productive ocean waters. Baseline TOC samples collected at

the proposed ocean disposal sites in 2000 averaged 500 mg/kg (USACE and E PA 2001).

Metals

. Overall, metals concentrations were comparable between samples at the North ODMDS drop

site stations versus those in the background stations (Table C

- 15). Exceptions included concentrations

that were slightly lower at the North drop site stations for iron, magnesium, vanadium, and nickel, and

higher for calcium and potassium. Metals concentrations detected in all samples were far below the

SEF SLs (SEF 2009). The following metals were not detected at any of the sampling stations:

a ntimony, cadmium, cobalt, copper, mercury, selenium, and thallium.

Organotins (including TBT)

. In marine sediments, pore

- water analysis has been shown to improve the

reliability of toxicity predictions over bulk

- sediment, dry

- weight analysis and conseque ntly is required

in marine environments (Michelsen et al. 1996). No organotin compounds were detected at any

station (Table C

- 16); however, the laboratory method reporting limit was much greater than the SEF

SL. For this analysis, none of the initial cal ibration and calibration verification, matrix spike/matrix

spike duplicate, and laboratory duplicates met established laboratory/quality assurance criteria. While

not noted in the laboratory results, it may also have occurred because of the small amount o f pore

water that can be extracted from sediment consisting primarily of sand. Significant concentrations of

TBT or other organotins were not expected since dredged material is tested prior to disposal; prior

testing of the dredge material in 2005 and 201 0 showed non

- detects of TBT and either non

- detects or

extremely low concentrations for other organotins.

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 13 Figure C

- 3 . Sediment Sampling Sites , June and August 2008

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 14 Figure C

- 4 . Mean Grain Size , June 2008

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 15 Organic Compounds

Semivolatile Organic Compounds (SVOCs)

. Results of the analysis for SVOCs, including chlorinated

hydrocarbons, miscellaneous extractables, phthalates, and phenols, are shown in Table C

- 17 along

with SEF SLs (SEF 2009). All c oncentrations of SVOCs in the North drop zone and background

stations were below SEF SLs. Benzoic acid was detected at three background stations at levels, but

concentrations were well below SEF SLs. The only SVOCs detected above the method reporting lev el

in the North drop zone w ere bis(2

- ethylhexyl) phthalate and di

- n

- butylphthalate, both of which were

found only in the sample duplicate collected at station YQ

- 024. The detected concentrations [ 73 and

170 micrograms per kilogram (μg/kg) , respectively ] were far below the SEF SLs of 1

, 300 μg/kg and

1

, 400 μg/kg

. The compounds 2,4

- dimethylphenol at station YQ

- 28 and pentachlorophenol at stations

YQ

- 24D and YQ

- 25 also were identified, but each value is considered an estimate. These results

above are expec ted because i n a matrix made up of primarily sand

- sized particles or larger, any

organic contamination is expected to be minimal.

For several compounds, t he laboratory method r eporting limit exceeded the SEF SLs slightly ; these

included 2,4

- dimethylphenol

, dieldrin, heptachlor, hexachlorobenzene, hexachlorobutadiene, and n

nitrosodiphenylamine. However, the method reporting level was consistent for all compounds

analyzed by the SVOC method. The reporting levels that were exceeded were for compounds with

SLs very close to the reporting levels. Numerous other SVOCs had much higher screening levels and

showed no detections. In addition to the statements above suggesting that concentrations of these

compounds are not likely of concern, one of the compounds for which the SL was above the method

reporting limit, were detected in either the 2005 or 2010 sediment characterization sampling of the

dredge material thus, w ould not be expected at the ODMDS sites.

Polychlorinated Biphenyls

. PCB aroclor s were not de tected at any of the Yaquina ODMDS sampling

stations (Table C

- 18) . The SEF SL is 130 μg/kg for the total of all detected PCBs.

Pesticides. P esticides were not detected at any of the Yaquina ODMDS sampling sites (Table C

- 19)

.

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 16 Table C

- 14 . Results for Grain Size, Total Solids, and TOC , 2008

* Sample from southern part of North ODMDS; disposal has not occurred.

** Sample from South ODMDS; disposal has not occurred.

D : D uplicate sample. LD: Lab Duplicate.

Station Water

Depth (feet) %

Gravel % Coarse

Sand (a) % Medium

Sand (b) % Fine

Sand (c) % Total

Sand

(a+b+c) % Total

Fines Mean

Grain Size

(mm) TOC

(mg/kg

- dry)

North ODMDS D rop Site

YQ

- 028 12 2 0.1 1.3 25 71 9 8 1.8 0.213 286

YQ

- 023 145 0.3 1.4 21 7 6 98 1.4 0.205 522

YQ

- 024 130 0 0.9 21 7 7 9 9 1.1 0.204 350

YQ

- 024D 13 3 0 0.6 21 7 8 100 0.2 0.204 276

YQ

- 025 12 1 0 0.7 18 80 9 9 1.3 0.195 312

Background Stations

– Southern part of North ODMDS

YQ

- 02* 13 7 0 0.4 22 7 6 98 1.8 0.203 495

YQ

- 02D* 140 0 0.3 20 7 9 9 9 1.2

-- 617

YQ

- 01* 116 0 0.5 8 90 9 9 1.2 0.171 633

Background Stations

– South ODMDS

YQ

- 013** 120 0 0.2 1 1 8 6 9 7 3.5 0.178 577

YQ

- 014** 133 0 0.2 10 8 9 99 1.1 0.181 590

YQ

- 029** 137 0 0.2 9 90 98 1.6 0.180 551

YQ

- 016** 117 0 0.4 2 5 7 2 97 2.9 0.206 388

YQ

- 016 LD1

-- 0.1 0.4 25 72 97 2.6

-- --

YQ

- 016 LD2

-- 0.1 0.4 26 72 98 2.0

-- --

YQ

- 017** 128 0 0.3 17 80 9 8 2.2 0.191 468

YQ

- 018** 139 0 0.2 12 85 97 2.8 0.182 456

Background Stations

– Outside of Proposed ODMDSs

YQ

- 026 1 40 0 0.2 1 9 79 98 1.9 0.193 503

YQ

- 022 15 4 0 8.2 6 8 2 3 9 9 1.4 0.308 406

YQ

- 06 134 0.3 0.5 10 89 100 0 0.182 689

YQ

- 010 116 0 0.4 20 7 9 99 0.6 0.200 373

YQ

- 020 14 9 0 0.2 11 87 9 9 1.1 0.183 618

YQ

- 027 1 30 0 0.7 34 6 4 98 1.7 0.223 336

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 17 Table C

- 15 . Results for Metals , 2008 (ppm)

* Sample from southern part of North ODMDS; disposal has not occurred in this area.

** Sample from South ODMDS; disposal has not occurred in this area.

D : D uplicate sample

. U: The analyte was not detected at or above the reported value.

J: The identifica tion of the ana l yte is acceptable; however

, the reported value is an estimate.

UJ: The analyte was not detected at or above the reported value ; the reported value is an estimate.

Station Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead

North ODMDS D rop Site

YQ

- 028 2170 0.98 UJ 3.46 4.9 0.087 0.49 U 5000 J 6.35 2.5 U 2.5 U 4550 0.99

YQ

- 023 2790 0.96 UJ 3.5 4.77 0.11 0.48 U 3500 J 7.43 2.4 U 2.4 U 5900 1.1

YQ

- 024 2530 1 UJ 3.65 4.4 0.1 0.5 U 3600 J 7.41 2.5 U 2.5 U 5520 1.1

YQ

- 024D 2230 0.96 UJ 3.4 4.6 0.085 0.48 U 3100 J 6.67 2.4 U 2.4 U 4690 1

YQ

- 025 2460 0.94 UJ 3.49 4.27 0.091 0.47 U 2800 J 7.78 2.4 U 2.4 U 5190 1.1

Background Stations

– Southern Part of North ODMDS

YQ

- 02 * 2710 1 UJ 2.59 4.31 0.09 0.5 U 760 J 12.3 2.5 U 2.5 U 6200 1.3

YQ

- 02D * 2650 1 UJ 2.56 4.65 0.093 0.5 U 750 J 11.8 2.5 U 2.5 U 6020 1.3

YQ

- 01 * 2880 0.96 UJ 2.3 5.46 0.1 0.48 U 1190 14.8 2.4 U 2.4 U 6730 1.8

Background Stations

– South ODMDS

YQ

- 013 ** 2990 1 UJ 2.95 4.37 0.1 0.5 U 1100 J 12.9 2.5 U 2.5 U 6900 1.5

YQ

- 014 ** 3220 1 UJ 3.46 5.06 0.12 0.5 U 760 J 13 2.5 U 2.5 U 7700 1.5

YQ

- 029 ** 2850 1 UJ 3.35 5.17 0.11 0.5 U 790 J 12.1 2.5 U 2.5 U 7150 1.5

YQ

- 016 ** 2200 1 UJ 2.57 3.29 0.084 0.5 U 630 J 9.43 2.5 U 2.5 U 5460 1.1

YQ

- 017 ** 2850 1 UJ 3.26 4.97 0.11 0.5 U 1100 J 11.1 2.5 U 2.5 U 6940 1.3

YQ

- 018 ** 2810 1 UJ 3.02 4.34 0.1 0.5 U 620 J 10.9 2.5 U 2.5 U 6640 1.3

Background Stations

– Outside Proposed ODMDS

YQ

- 026 2500 1 UJ 2.78 4.04 0.097 0.5 U 850 J 11.5 2.5 U 2.5 U 6000 1.3

YQ

- 022 2210 0.98 UJ 3.68 4 0.095 0.49 U 390 J 8.75 2.5 U 2.5 U 6180 1.3

YQ

- 06 2960 1 UJ 3.05 5.54 0.11 0.5 U 780 J 14.1 2.5 U 2.5 U 6950 1.4

YQ

- 010 2130 1 UJ 3.17 3.45 0.082 0.5 U 760 J 7.89 2.5 U 2.5 U 4950 1.1

YQ

- 020 3040 1 UJ 3.25 5.24 0.1 0.5 U 700 J 14.3 2.5 U 2.5 U 7440 1.5

YQ

- 027 2330 1 UJ 2.81 5.35 0.095 0.5 U 540 J 9.49 2.5 U 2.5 U 5760 1.1

SEF SL

-- 150 57

-- -- 5.1

-- 260

-- 390

-- 450

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 18 Table C

- 15 (continued). Results for Metals , 2008 (ppm)

* Sample from southern part of North ODMDS; disposal has not occurred in this area.

** Sample from South ODMDS; disposal has not occurred in this area.

D : D uplicate sample

. U: The analyte was not detected at or above the reported value.

J: The identifica tion of the ana l yte is acceptable; however

, the reported value is an estimate.

UJ: The analyte was not detected at or above the reported value ; the reported value is an estimate.

Station Mag

nesium Manganese Mercury Molybdenum Nickel Potassium Selenium Silver Sodium Thallium Vanadium Zinc

North ODMDS D rop Site

YQ

- 028 1380 27.1 0.0099 U 2.5 U 3.4 491 0.49 U 0.049 U 2620 0.25 U 6.44 8.38

YQ

- 023 1730 43.6 0.0098 U 2.4 U 4.7 556 0.48 U 0.048 U 3250 0.24 U 8.65 11

YQ

- 024 1670 36.5 0.0096 U 2.5 U 4.3 552 0.5 U 0.05 U 3310 0.25 U 7.84 10.5

YQ

- 024D 1450 31.9 0.0099 U 2.4 U 3.8 502 0.48 U 0.048 U 3090 0.24 U 6.89 8.79

YQ

- 025 1620 32.7 0.01 U 2.4 U 4.76 524 0.47 U 0.047 U 2750 0.24 U 7.66 9.89

Background Stations

– Southern Part of North ODMDS

YQ

- 02 * 1970 40.6 0.0099 U 2.5 U 6.38 637 0.5 U 0.05 U 2600 0.25 U 9.79 11.7

YQ

- 02D * 1950 41.4 0.0098 U 2.5 U 6.34 631 0.5 U 0.05 U 2890 0.25 U 9.68 11.6

YQ

- 01 * 2280 54.4 0.0099 U 2.4 U 8.81 639 0.48 U 0.048 U 2700 J 0.24 U 14.1 13.9

Background Stations

– South ODMDS

YQ

- 013 ** 2150 46.1 0.0099 U 2.5 U 7.23 631 0.5 U 0.05 U 2880 0.25 U 12 11.9

YQ

- 014 ** 2300 44.3 0.0099 U 2.5 U 7.97 724 0.5 U 0.05 U 3170 0.25 U 11.8 13.8

YQ

- 029 ** 2230 38.5 0.0097 U 2.5 U 7.13 722 0.5 U 0.05 U 4450 0.25 U 10.9 12.9

YQ

- 016 ** 1630 31.3 0.0099 U 2.5 U 5.04 517 0.5 U 0.05 U 3140 0.25 U 8.77 9.66

YQ

- 017 ** 2070 37.5 0.0098 U 2.5 U 6.62 656 0.5 U 0.05 U 2970 0.25 U 10.1 12.3

YQ

- 018 ** 2030 37 0.0099 U 2.5 U 6.78 643 0.5 U 0.05 U 3070 0.25 U 10 11.8

Background Stations

– Outside of Proposed ODMDS

YQ

- 026 1910 38.9 0.0097 U 2.5 U 6.14 598 0.5 U 0.05 U 2890 0.25 U 9.54 11

YQ

- 022 1500 28.7 0.01 U 2.5 U 4.1 559 0.49 U 0.049 U 2750 0.25 U 9.19 10.4

YQ

- 06 2230 42.5 0.0098 U 2.5 U 7.56 708 0.5 U 0.05 U 3070 0.25 U 10.5 13.1

YQ

- 010 1510 29.3 0.0099 U 2.5 U 4.7 461 0.5 U 0.05 U 2730 0.25 U 7.28 8.96

YQ

- 020 2280 42.3 0.0099 U 2.5 U 7.88 692 0.5 U 0.05 U 2880 0.25 U 11.1 13.1

YQ

- 027 1600 29.2 0.01 U 2.5 U 5.09 548 0.5 U 0.05 U 2440 0.25 U 8.83 9.91

SEF S L

-- -- 0.41

-- -- -- -- 6.1

-- -- -- 410

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 19 Table C

- 16 . Results for Organotin , 2008 (μg/L)

* Sample from southern part of North ODMDS; disposal has not occurred.

** Sample from South ODMDS; disposal has not occurred.

D : D uplicate sample

. U: The analyte was not detected at or above the reported value.

J: The identifica tion of the ana l yte is acceptable; however

, the reported value is an estimate.

UJ: The analyte was not detected at or above the reported value ; the reported value is an estimate.

R: The presence or absence of the analyte cannot be determined from the data due to severe quality control problems.

The data are rejected and considered unusable. No value is reported with this qualification.



### Station Butyltin

trichloride Dibutyltin

dichloride Tetra

butyltin Tributyltin

chloride

North ODMDS D rop Site

YQ

- 028 5 U 5 U 5 U 5 U

YQ

- 023 5 U 5 U 5 U 5 U

YQ

- 024 5.1 U 5.1 U 5.1 U 5.1 U

YQ

- 024D 5.1 UJ 5.1 UJ 5.1 U 5.1 U

YQ

- 025 5 U 5 U 5 U 5 U

Background Stations

– Southern Part of North ODMDS

YQ

- 02* 5.1 U 5.1 U 5.1 U 5.1 U

YQ

- 02D* 5.1 U 5.1 U 5.1 U 5.1 U

YQ

- 01* 5.2 U 5.2 U 5.2 U 5.2 U

Background Stations

– South ODMDS

YQ

- 013** 5.1 U 5.1 U 5.1 U 5.1 U

YQ

- 014** 5 U 5 U 5 U 5 U

YQ

- 029** 5.1 U 5.1 U 5.1 U 5.1 U

YQ

- 016** 5 U 5 U 5 U 5 U

YQ

- 017** 5.1 U 5.1 U 5.1 U 5.1 U

YQ

- 018** 5.1 U 5.1 U 5.1 U 5.1 U

Background Stations

– Outside of Proposed ODMDS

YQ

- 026 5.1 U 5.1 U 5.1 U 5.1 U

YQ

- 022 5.1 U 5.1 U 5.1 U 5.1 U

YQ

- 06 5.1 U 5.1 U 5.1 U 5.1 U

YQ

- 010 5 U 5 U 5 U 5 U

YQ

- 020 5.1 U R 5.1 U 5.1 U

YQ

- 027 5 U 5 U 5 U 5 U

SEF S L

-- -- -- 0.15

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 20 Table C

- 17

. Results for SVOCs , 2008 (μg/kg)

* Sample from southern part of North ODMDS; disposal has not occurred.

** Sample from South ODMDS; disposal has not occurred.

D : D uplicate sample

. U: The analyte was not detected at or above the reported value.

J: T he identifica tion of the ana l yte is acceptable; however

, the reported value is an estimate.

UJ: The analyte was not detected at or above the reported value ; the repor ted value is an estimate.

NA: Not analyzed.

Station 1,2,4

-

t richloro

benzene 2,4

-

d imethyl

phenol 4

-

m ethyl

phenol 9H

f luorene Acena

phthene Acena

phthylene Anthra

cene Benzene,

1,2

-

dichloro

Benzene,

1,3

-

dichloro

Benzene,

1,4

-

dichloro

Benzene

methanol Benzo(a)

-

a nthra

cene Benzo(a)

-

pyrene

North ODMDS D rop Site

YQ

- 028 25 U 25 UJ 25 U 25 U 25 U 25 U 25 U 25 U 25 U 25 U NA 25 U 25 U

YQ

- 023 25 U 25 U 25 U 25 U 25 U 25 U 25 U 25 U 25 U 25 U NA 25 U 25 U

YQ

- 024 30 U 30 U 30 U 30 U 30 U 30 U 30 U 30 U 30 U 30 U NA 30 U 30 U

YQ

- 024D 31 U 31 U 31 U 31 U 31 U 31 U 31 U 31 U 31 U 31 U NA 31 U 31 U

YQ

- 025 31 U 31 U 31 U 31 U 31 U 31 U 31 U 31 U 31 U 31 U NA 31 U 31 U

Background Stations

– Southern Part of North ODMDS

YQ

- 02 * 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 UJ 29 UJ 29 UJ NA 29 U 29 U

YQ

- 02D * 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U NA 29 U 29 U

YQ

- 01 * 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U NA 28 U 28 U

Background Stations

- South ODMDS

YQ

- 013 ** 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U NA 28 U 28 U

YQ

- 014 ** 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U NA 28 U 28 U

YQ

- 029 ** 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U NA 29 U 29 U

YQ

- 016 ** 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U NA 28 U 28 U

YQ

- 017 ** 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U NA 29 U 29 U

YQ

- 018 ** 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U NA 28 U 28 U

Background Stations

– Outside of Proposed ODMDS

YQ

- 026 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U NA 29 U 29 U

YQ

- 022 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U NA 29 U 29 U

YQ

- 06 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U NA 29 U 29 U

YQ

- 010 27 U 27 U 27 U 27 U 27 U 27 U 27 U 27 U 27 U 27 U NA 27 U 27 U

YQ

- 020 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U NA 29 U 29 U

YQ

- 027 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U NA 28 U 28 U

SEF SL 31 29 670 540 500 560 960 35

-- 110

-- 1300 1600

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 21 Table C

- 17 (continued). Results of SVOC s , 2008 (μg/kg)

* Sample from southern part of North ODMDS; disposal has not occurred.

** Sample from South ODMDS; disposal has not occurred.

D : D uplicate sample

. U: The analyte was not detected at or above the reported value.

J: T he identifica tion of the ana l yte is acceptable; however

, the reported value is an estimate.

UJ: The analyte was not detected at or a bove the reported value ; the reported value is an estimate.

Station Benzo

-

(g,h,i)

- perylene Benzo[b]

-

f luor

anthene Benzo[k]

-

f luor

anthene Benzoic

acid Bis

-

(2

- ethylhexyl)

- phthalate Butyl

b enzyl

phthalate Chry

sene Dibenzo

-

[a,h]

-

anthracene Dibenzo

furan Diethyl

phthalate Dimethyl

phthalate Di

- n

Butyl

phthalate Di

- n

O ctyl

phthalate

North ODMDS D rop Zone

YQ

- 028 25 U 25 U 25 U 140 UJ 25 U 25 U 25 U 50 U 25 U 25 U 25 U 25 U 50 U

YQ

- 023 25 U 25 U 25 U 130 UJ 25 U 25 U 25 U 50 U 25 U 25 U 25 U 25 U 25 U

YQ

- 024 30 U 30 U 30 U 162 U 30 U 30 U 30 U 30 U 30 U 30 U 30 U 30 U 30 U

YQ

- 024D 31 U 31 U 31 U 300 UJ 73 31 U 31 U 62 U 31 U 31 U 31 U 170 31 U

YQ

- 025 31 U 31 U 31 U 290 UJ 31 U 31 U 31 U 62 U 31 U 31 U 31 U 31 U 31 U

Background Stations

– Southern Part of North ODMDS

YQ

- 02 * 29 U 29 U 29 U 159 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U

YQ

- 02D * 29 U 29 U 29 U 147 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U

YQ

- 01 * 28 U 28 U 28 U 155 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U

Background Stations

– South ODMDS

YQ

- 013 ** 28 U 28 U 28 U 152 UJ 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U

YQ

- 014 ** 28 U 28 U 28 U 162 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U

YQ

- 029 ** 29 U 29 U 29 U 150 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U

YQ

- 016 ** 28 U 28 U 28 U 149 U 28 U 28 U 28 U 28 U 28 U 35 UJ 28 U 28 U 28 U

YQ

- 017 ** 29 U 29 U 29 U 193 UJ 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U

YQ

- 018 ** 28 U 28 U 28 U 183 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U

Background Stations

– Outside of Proposed ODMDS

YQ

- 026 29 U 29 U 29 U 155 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U

YQ

- 022 29 U 29 U 29 U 162 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U

YQ

- 06 29 U 29 U 29 U 158 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U

YQ

- 010 27 U 27 U 27 U 146 U 27 U 27 U 27 U 27 U 27 U 41 UJ 27 U 27 U 27 U

YQ

- 020 29 U 29 U 29 U 197 UJ 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U

YQ

- 027 28 U 28 U 28 U 195 UJ 28 U 28 U 28 U 28 U 28 U 142 U 28 U 28 U 28 U

SEF SL 670 3200 650 1300 63 1400 230 540 200 71 1400 6200

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 22 Table C

- 17 (continued). Results of SVOC s , 2008 (μg/kg)

* Sample from southern part of North ODMDS; disposal has not occurred.

** Sample from South ODMDS; disposal has not occurred.

D : D uplicate sample

. U: The analyte was not detected at or above the reported value.

J: T he identifica tion of the ana l yte is acceptable; however

, the reported value is an estimate.

UJ: The analyte was not detected at or above the reported value ; the reported value is an estimate.

Station Fluor

anthene Hexachloro

benzene Hexa

chloro

butadiene Hexa

chloro

ethane Indeno

(1,2,3

- cd)

-

pyrene Naph

thalene Naphthalene,

2

- methyl

n

- n itroso

diphenyl

amine Penta

chloro

phenol Phen

anthrene Phenol Phenol,

2

- methyl

Pyrene

North ODMDS D rop Zone

YQ

- 028 25 U 25 U 25 U 25 U 25 U 25 U 25 U 25 U 50 U 25 U 25 U 25 U 25 U

YQ

- 023 25 U 25 U 25 U 25 U 50 U 25 U 25 U 25 U 50 U 25 U 25 U 25 U 25 U

YQ

- 024 30 U 30 U 30 U 30 U 30 U 30 U 30 U 30 U 30 U 30 U 30 U 30 U 30 U

YQ

- 024D 31 U 31 U 31 U 31 U 62 U 31 U 31 U 31 U 120 UJ 31 U 31 U 31 U 31 U

YQ

- 025 31 U 31 U 31 U 31 U 62 U 31 U 31 U 31 U 124 UJ 31 U 31 U 31 U 31 U

Background Stations

– Southern part of North ODMDS

YQ

- 02 * 29 U 29 U 29 U 29 UJ 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U

YQ

- 02D * 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U

YQ

- 01 * 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U

Background Stations

– South ODMDS

YQ

- 013 ** 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U

YQ

- 014 ** 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U

YQ

- 029 ** 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U

YQ

- 016 ** 28 U 28 U 28 U 28 UJ 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U

YQ

- 017 ** 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U

YQ

- 018 ** 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U

Background Stations

– Outside of Proposed ODMDS

YQ

- 026 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U

YQ

- 022 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U

YQ

- 06 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U

YQ

- 010 27 U 27 U 27 U 27 U 27 U 27 U 27 U 27 U 27 U 27 U 27 U 27 U 27 U

YQ

- 020 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U 29 U

YQ

- 027 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U 28 U

SEF SL 1700 22 11

-- 600 2100 670 28 400 1500 420 63 2600

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 23 Table C

- 18 . Results for PCBs , 2008 (μg/kg)

* Sample from southern part of North ODMDS; disposal has not occurred.

** Sample from South ODMDS; disposal has not occurred.

D : D uplicate sample

. U: T he analyte was not detected at or above the reported value.

Station PCB

1016 PCB

1221 PCB

1232 PCB

1242 PCB

1248 PCB

1254 PCB

1260

North ODMDS Drop Zone

YQ

- 028 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 023 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 024 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 024D 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 025 10 U 10 U 20 U 10 U 10 U 10 U 10 U

Background Stations

– Southern part of North ODMDS

YQ

- 02* 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 02D* 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 01* 10 U 10 U 21 U 10 U 10 U 10 U 10 U

Background Stations

– South ODMDS

YQ

- 013** 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 014** 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 029** 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 016** 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 017** 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 016** 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 017** 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 018** 10 U 10 U 20 U 10 U 10 U 10 U 10 U

Background Stations

– Outside of Proposed ODMDS

YQ

- 026 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 022 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 06 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 010 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 020 10 U 10 U 20 U 10 U 10 U 10 U 10 U

YQ

- 027 10 U 10 U 20 U 10 U 10 U 10 U 10 U

### Appendix C, Yaquina River ODMDS Evaluation / EA 

### C

- 24 Table C

- 19 . Results for Pesticides , 2008 (μg/kg)

* Sample from southern part of North ODMDS; disposal has not occurred.

** Sample from South ODMDS; disposal has not occurred.

D : D uplicate sample

. U: The analyte was not detected at or above the reported value.

Station Aldrin cis

- Chlordane

(alpha

Chlordane) cis

N on

achlor Gamma

c hlor

dane trans

N on

achlor Dieldrin Endrin Hepta

chlor Hepta

chlor

Epoxide Lindane o,p'

-

DDD o,p'

-

DDE o,p'

-

DDT P,P'

-

DDD P,P'

-

DDE P,P'

-

DDT

North ODMDS D rop Zone

YQ

- 028 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U

YQ

- 023 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U

YQ

- 024 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U

YQ

- 024D 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U

YQ

- 025 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U 2.3 U

Background Stations

– Southern part of North ODMDS

YQ

- 02 * 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U

YQ

- 02D * 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U

YQ

- 01 * 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U

Background Stations

– South ODMDS

YQ

- 013 ** 2 U 2 U 2 U 2 U 2 U 2 U 2 U 2 U 2 U 2 U 2 U 2 U 2 U 2 U 2 U 2 U

YQ

- 014 ** 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U

YQ

- 029 ** 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U

YQ

- 016 ** 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U

YQ

- 017 ** 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U

YQ

- 018 ** 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U

Background Stations

– Outside of Proposed ODMDS

YQ

- 026 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U

YQ

- 022 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U

YQ

- 06 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U

YQ

- 010 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U

YQ

- 020 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U 2.1 U

YQ

- 027 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U 2.2 U

SEF SL 9.5 2.8 1.9

-- 1.5

-- -- -- -- -- 16 9 12

### Appendix C, Yaquina River ODMDS Evaluation / EA C

- 2 5 

# D ISCUSSION AND 

# C ONCLUSIONS

When evaluating the appropriateness and suitability of a location(s) to receive dredge material, the

EPA and the USACE need to consider the following areas with regards to sediment quality:

1. Physical and chemical sediment compatibility

. 2. Water column chemist ry and physical characteristics

. 3. Influence of past disposal

. 4. Size and shape of the disposal site

. 5. Size of the buffer zone

. 6. Degraded areas

. 7. Potential for c umulative e ffects

.

The latest sediment sampling efforts for the Yaquina federal navigation project and proposed North

and South ocean disposal sites occurred in 20 10 and 2008, respectivel y. Sampling and analyses of

sediments were conducted in accordance with the SEF (2009) and included testing for metals, TOC

, pesticides

, PCBs, phenols, phthalates, miscellaneous extractables, PAHs and TBT

.

Eight box core grab samples and one gravity core sample w ere collected from the federal navigation

project area on July 28 , 20 10 . All nine sediment samples were submitted for physical analyses, with

five samples collected from finer

- grained areas further subjected to chemical analyses. T he overall

mean grain size for the project is 72% sand, with a mean grain size of 94% sand for the fe deral

navigation channel (entrance to turning basin) and 45% sand within South Beach m arina. All

analyte concentrations were substantially below the SEF SLs. The data from samples collected

during 2010 were consistent with historical sampling results

. T he material within the federal

navigation channel and South Beach m arina was found to be suitable for unconfined in

- water

placement without further characterization

.

S ediment samples were collected in and near the Yaquina ocean disposal sites in 2008 to c ompare

conditions of the North ODMDS drop site where dredged material from the Yaquina Bay and

federal channel has been placed, with stations where dredged material disposal has not occurred

(“background” stations). Physical analyses showed primarily medi um sand with little variation.

The percent sand was essentially the same at the North ODMDS drop site stations as that of the

background stations, although the mean grain sizes were more consistent at the North ODMDS drop

zone stations. Metals concentrat ions detected in all samples were far below SEF SLs . The

following metals were not detected at any of the sampling stations: antimony, cadmium, cobalt,

copper, mercury, selenium, and thallium. No organotin (TBT), PCBs or pesticides were detected at

any station. All detected concentrations of SVOCs (including PAHs) in both the North ODMDS

drop zone and background stations were below SEF SLs . Although the laboratory reporting limits

for the following compounds exceeded the SEF SLs , none were detected abo ve the reporting limits

in any samples: 2,4

- dimethylphenol, dieldrin, heptachlor, hexachlorobenzene, hexachlorobutadiene,

and n

- nitrosodiphenylamine . T he sediments in the North ODMDS drop zone stations do not appear

to have been negatively impacted by dr edged material disposal.

### Appendix C, Yaquina River ODMDS Evaluation / EA C

- 26 

# R EFERENCES

EPA and USACE ( U.S. Environmental Protection Agency and U.S. Army Corps of Engineers )

. February 1998. Evaluation of Dredged Material Proposed for Discharge in Inland and Near

Coastal Waters

- Testing Manual (referred to as the “Inland Testing Manual”).

Fuhrer, G.J. and F.A. Rinella. 1983. Analyses of Elutriates, Native Water, and Bottom Ma terial in

Selected Rivers and Estuaries in Western Oregon and Washington. U.S. Geological Survey

Open File Report 82

- 922.

Michelsen, T., T.C. Shaw, and S. Stirling. 1996. Testing, Reporting, and Evaluation of Tributyltin

Data in PSDDA and SMS Programs. Pu get Sound Dredged Disposal Analysis (PSDDA) Issue

Paper and Sediment Management Standards (SMS) Technical Information Memorandum.

Nelson, P.O., C.K. Sollitt, K.J. Williamson and D.R. Hancock, 1983. Coos Bay Offshore Disposal

Site Investigation Interim Report, Phase II

- III, Coos Bay Offshore Disposal Site Investigation

Interim Report, Phase II

- III April 1980

- June 1981. Report to U.S. Army Corps of Engineers,

Portland District, Portland, OR, under con tract no. DACW57

- C

- 0040, Oregon State University,

Corvallis, OR.

SEF ( Sediment Evaluation Framework)

. May 2009 . Sediment Evaluation Framework for the Pacific

Northwest

. Prepared by U.S. Army Corps of Engineers Seattle

, Portland

, and Walla Walla

District s and Northwestern Division; U.S. Environmental Protection Agency Region 10;

Washington Department s of Ecology and Natural Resources; Oregon Department of

Environmental Quality; Idaho Department of Environmental Quality; National Marine Fisheries

Service; and U.S. Fish and Wildlife Service.

USACE. April 2009. Biological Assessment for Coastal Dredging Projects. Portland District.



### USACE. January 2010. Study Status Information Report, Yaquina Bay. Portland District, Portland,

OR. Located at http://www.nwp.usace.army.mil/docs/d_sediment/odmds/Yaquina_AMR.pdf

( a ccessed August 2011)

.

USACE (U.S. Army Corps of Engineers). September 2010. Yaquina Bay Sediment Quality

Evaluation Report. Portland District. Located at

http://www.nwp.usace.army.mil/environment/sediment.asp ( a ccessed August 2011)

.

USACE and EPA ( U.S. Army Corps of Engineers and U.S. Environmental Pr otection Agency )

. February 1991. Evaluation of Dredged Material Proposed for Ocean Disposal

– Testing Manual

(referred to as the “Ocean Testing Manual” or “Green Book”) located at

http://www.epa.gov/owow/ oceans/gbook/ ( a ccessed August 2011)

.

USACE and EPA. 2001. Yaquina Bay Interim Ocean Dredged Material Disposal Site Evaluation

Study and Environmental Assessment. Portland District and EPA Region 10. Located at

http://www.nwp.usace.army.mil/environment/sediment.asp ( a ccessed August 2011)

.

USACE and EPA. March 2011. 2008 Monitoring Studies at Yaquina Bay Ocean Dredged Material

Disposal Sites (ODMDS) . Final Data Report. Portland District and EPA Region 10.