Comment on Proposed Cleanup
&EPA
United States
Environmental Protection
Agency
Region 10
Seattle, WA
What is Boeing Plant 2?
Boeing Plant 2 is a hazardous waste site
located on the east bank of the Duwamish
Waterway at 7755 East Marginal Way South
in Seattle and Tukwila, Washington.
Plant 2 was built in the late 1930s and was a major
aircraft manufacturing facility during World War II.
Polychlorinated biphenyls (PCBs) and other toxic
chemicals from large electricity generators and trans-
formers were released at Plant 2 and into the Lower
Duwamish Waterway (LDW). PCBs were also used
in paints and caulking at Plant 2.
Boeing is under an EPA Resource Conservation
and Recovery Act (RCRA) Order to investigate and
study cleanup options for Plant 2. When the LDW
became a Superfund site, several "hot spot" areas
of sediment contamination were found that could
be cleaned up before the larger Superfund cleanup.
Boeing Plant 2 is one of these hot spot cleanups.
April-May 2011
Three other hot spot cleanups are nearby: Slip 4 to
the north, Jorgensen Forge to the south and Termi-
nal 117 across the waterway.
What are the cleanup options?
EPA's Statement of Basis describes the cleanup op-
tions for the sediments and shoreline at Boeing Plant
2. The cleanup will remove toxic PCBs, metals, car-
cinogenic polycyclic aromatic hydrocarbons (cPAHs)
and phthalates. PCBs are the most widespread and
significant pollutant in the sediments at Plant 2.
The cleanup options would either dredge (excavate)
the sediments and then backfill with clean material,
or place a thick cap to isolate the contamination.
EPA will respond to public comments and decide on
the cleanup plan in a Final Decision and Response to
Comments. Cleanup options for the Plant 2 uplands
areas (the rest of the Plant 2 site) will be issued in a
second Statement of Basis in 2012. Boeing will con-
duct the cleanups under EPA oversight.
BOEING PLANT 2
Transition
Zone
Building 2-10
I North Bank
| Area
I Slip 4 Corrective
Measure
Outfall 12
Southwest Bank
Corrective Measure
Jorgensen Early
Action Area
North Sediment Area
South Sediment Area
Navigation Channel Boundary
Navigation Channel Boundary
Lower Duwamish Waterway
Terminal 117
Early Action Area
APPROXIMATE SCALE IN FEET
j East Marginal Way South |
| King County International Airport S


Buildinq 2-41








I Boeing Slip 4 Corrective
I Measure Area
|| North Bank
I Area
Boeing Plant 2
Sediment Cleanup Area
Underbuilding Area
Jorgensen Forge
Early Action Area
Lower Duwamish Superfund Site
Early Action Areas

-------
Cleanup goals
The biggest health risk from Lower Duwamish
Waterway sediments is for people who eat fish,
shellfish, and crabs that live in the Duwamish all
year. The fish, shellfish, and crabs are not safe to
eat because they collect contaminants from the
sediment in their bodies. Salmon do not spend
much time in the Duwamish, and are safer to eat.
(learn more at www.doh.wa.gov)
EPA's target cleanup levels for Boeing Plant 2
sediments are designed to protect tribal fishers and
other people who might eat a significant amount
Two main sediment and shoreline areas will be
cleaned up at Plant 2:
•	North Area (north of 16th Ave.) and
•	South Area (south of 16th Ave.)
EPA looked at two cleanup options for the North
Area sediments (N1 andN2) and four options for
the South Area sediments (S1-S4). EPA proposes
to choose the N2 and S4 cleanup options which will
remove all sediments contaminated above the state
sediment quality standard, followed by backfill with
clean material. Several smaller "other areas" will
be cleaned up, including part of Slip 4 owned by
Boeing and Transition Zone sediments next to the
Jorgensen Forge facility.
of fish and shellfish from the Duwamish. For toxic
chemicals like PCBs that move up through the food
chain, the target cleanup level at Plant 2 is based
on calculations of health risks from eating fish and
shellfish.
The target cleanup level for toxic metals is based
on the state's sediment standards to protect the tiny
organisms that live in the sediments, fish, birds, and
other animals in the Duwamish.
EPA will choose the most protective values for
the target cleanup levels, in the Final Decision and
Response to Comments.
The results of dredging are most certain because you
know the contamination is gone. Dredging is cheaper
than some of the capping options, but it can take
longer than capping. Capping is less disruptive and
faster than dredging, but the cap must be checked
forever to make sure it continues to work.
All of the cleanup options will reduce contamination
and make the Duwamish Waterway safer for people
and animals.
After the cleanup, the groundwater and stormwater
will be checked twice a year to make sure that no
more contamination is coming from Plant 2. The
sediments will be checked for at least 10 years.
Cleanup options N2 and S4:
dredge and backfill
Cleanup options N1 and SI-S3:
dredge and cap
EPA prefers both of these options which will
remove all sediments that do not meet the
state standard
Options N2 and S4 would:
•	Dredge sediments up to 20 feet deep
•	Backfill with at least 2 feet of clean material
These options remove some contaminated
sediments but leave some behind that do not
meet the state standard
Options N1 and S1-S3 would:
•	Dredge sediments 4 to 11 feet deep
•	Cap with 4 feet of sand, rock, and gravel
•	Leave contamination beneath the caps:
107-801 ppm PCBs (9-67x state standard)
"Other area"cleanups (Boeing Slip 4 sediments, North Bank, 2-40's Underbuilding,Southwest Bank/
Outfall 12, and Jorgensen ForgeTransition Zone) will be included with all cleanup options:
•	Dredge sediments deep enough to meet the state sediment standard
•	Backfill with clean material that meets EPA's cleanup levels
Note: The Jorgensen Forge facility, located on the south side of Plant 2, is under an EPA Superfund Order to investigate and study cleanup options
for the sediments and shoreline. Because the sediment contamination at Plant 2 and Jorgensen Forge are mixed in some areas, the Boeing and
Jorgensen Orders require coordination to clean up the sediments in the Transition Zone between them. EPA will issue the proposed Jorgensen
cleanup plan for public comment later this spring.
2

-------
Comparing the cleanup options

Options N2 and S4: dredge
and backfill
Options N1 and S1-S3:
dredge and cap
Protects the health of people
and the environment
0
0
Achieves the cleanup levels
0
0
Complies with federal and
state standards
0
0
Reduces the toxicity,
movement, or amount of
contamination
N2 and S4 are better at reducing
toxicity, movement, and
contamination
N1 and SI -S3 are not as good
at reducing toxicity, movement,
and contamination
Effective in the long-term
and permanent
N2 and S4 are more permanent,
reliable,and certain because
contamination will be removed
N1 and S1-S3 are less perma-
nent, reliable, or certain because
caps will require long-term
monitoring and maintenance
Sediment removed
(cubic yards)
N2:114,000
S4:86,000
N1:142,000
S1-S3:43,000- 81,000
Other areas: 15,000
Cost
N2:$18,191,000
S4: $15,583,000
N1: $23,046,000
SI -S3: $7,110,000 -
$13,393,000
Other areas: $2,719,000
Comment on the Boeing Plant 2
sediment cleanup by May 28
Read the cleanup plan at:
http://go.usa.gov/449 or
South Park Library (8604 8th Avenue South)
EPA Region 10 Library (1200 6th Avenue)
Come to the public meeting:
April 27,2011
South Park Community Center
8319 8th Avenue South
CD Open House: 6:00 p.m.
CD Presentation: 7:00 p.m.
® Public Comments: 8:00 p.m.
Interpretation espanol estard disponible.
Send your comments to EPA by May 28:
E-mail: blocker.shawn@epa.gov
Mail:	Shawn Blocker
U.S. EPA, Region 10
1200 6th Avenue
Suite 900, AWT-121
Seattle, Washington 98101
Questions?
Contact Kendra Tyler, EPA community
involvement coordinator at
8 (206) 553-0041 or by e-mail at
^0 tyler.kendra@epa.gov
TTY users please call 800-877-8339
Si desea hablar con alguien que habla espanol,
llame a Michael Ortiz, EPA, (206) 553-6234
For More Information
Visit the Lower Duwamish Waterway
Superfund site at
http://yosemite.epa.gov/rlO/cle anup. nsf/ldw
Contact the Duwamish River Cleanup
Coalition, the Superfund community advisory
group, to find out how you can help
8 (206) 954-0218 or
visit www.duwamishcleanup.org
V	J
3

-------
4%	United States
Environmental Protection
m % Agency
Region 10
1200 Sixth Avenue, Suite 900, ETPA-081
Seattle, Washington 98101-3140
April 2011




	 aaaaa-aa

i
I 	 i
¦ « ¦ . - ~		
few





Comment on Proposed Cleeaiup
Boeing Plant 2

m
Pubiif Meeting April 27
South Park Community Center
8319 8th Avenue South
•	Open House: 6:00 p.m.
•	Presentation: 7:00 p.m.
•	Public Comments: 8:00 p.m.
Interpretation espahol estara disponihle
*



3sT v
VT' ;
mSmrn"'
PB \ 1

Printed on 100% recycled paper

-------