HomeMy WebLinkAboutSEPA EPIC-16-91 - BOEING - THOMPSON / ISAACSON SOIL STABILIZATIONTHE BOEING COMPANY
& BOEING MILITARY
AIRPLANE DIVISION
THOMPSON /ISAACSON SITE
SOIL STABILIZATION PROJECT
8701 EAST MARGINAL
WAY SOUTH
EPIC -16 -91
WAC 197 -11 -970
DETERMINATION OF NONSIGNIFICANCE
Description of Proposal A pilot project involving the soil treatment and testing to
assure their stability. There the soil will b: placed back in the excavation site.
After the stabilization project has been co ;:;;1,2ted a proposed Boeing facility may
be constructed at the site.
Proponent The Boeing Company; Boeing Military Airplane Division.
Location of Proposal, including street address, if any Boeing Thompson /Isaacson site;
8701 East Marginal Way South; Section 4, Twn 4, Rge 4E.
Lead Agency: City of Tukwila File No. EPIC -16 -91
The lead agency for this proposal has determined that it does not have a probable
significant adverse impact on the environment. An environmental impact statement
(EIS) is not required under RCW 43.21C.030(2)(c). This decision was made after
review of a completed environmental checklist and other information on file with the
lead agency. This information is available to the public on request.
Mx There is no comment period for this DNS
[I This DNS is issued under 197 -11- 340(2). Comments must be submitted by
proposal for 15 days from the date belowe lead agency will not act on this
Responsible Official Rick Beeler
Position /Title
Planning Director Phone 433 -1846
Address 6200 Southcenter Boulevard, 1 afWA 98188
Date )//P% Signature
You may ap al this determination to the City Clerk at City Hall, 6200 Southcenter
Boulevard, Tukwila, WA 98188 no later than 10 days from the above date by written
appeal stating the basis of the appeal for specific factual objections. You may be
required to bear some of the expenses for an appeal.
Copies of the procedures for SEPA appeals are available with the City Clerk and
'fanning Department.
=ICONS
STATE OF WASHINGTON
DEPARTMENT OF ECOLOGY
Mail Stop PV -11 • Olympia, Washington 98504 -8711 • (206) 459 -6000
May 1, 1991
Mr. Darren Wilson
City of Tukwila
6300 Southcenter Blvd.
Suite 100
Tukwila, WA 98188
Dear Mr. Wilson:
Thank you for the opportunity to comment on the prethreshold consultation
for the Boeing Thompson /Isaacson Site Soil Stabilization Projects
proposed by the Boeing Company. We reviewed the environmental checklist
and have the following comments.
The Solid and Hazardous Waste Program of Ecology has spent considerable
time reviewing this proposed project. This includes existing
stabilization literature, data regarding past stabilization bench tests
and projects, site - specific conditions, and the project design and plan.
Based on our review, we believe appropriate measures have been proposed
to conduct this project in an environmentally sound manner in terms of
handling, treatment and disposal of the soils. Our comments do not cover
worker exposure issues as addressed in the Health and Safety plan since
this is handled by the Dept. of Labor and Industries.
At this time, we have given approval to Boeing to conduct a soils
stabilization pilot project at this site. This is allowed under the
"on -site treatment by generator" rule of the dangerous waste regulations.
This is approval for the pilot project only. Approval for the full -scale
project and the acceptability of the proposed long -term monitoring plan.
This information will be submitted by Boeing to Ecology upon completion
of the pilot project.
If you have any questions, please call Ms. Jeannie Summerhays in our
Northwest Regional Office at (206) 649 -7055.
Sincerely,
Ze2J-//rze,,-a4-0-6
M. Vernice Sa
Environmental
MVS:
C -91 -151
cc: Jeannie Summerhays, NWRO
Janet Thompson -Lee, NWRO
MAY 02 1991
CITY OF l ur\vviL4
PLANNING DEPT.
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CITY OF TUKWILA
DEPARTMENT OF COMMUNITY DEVELOPMENT
annin
ENVIRONMBSTAL REVIEW
ROUTING FORM
EP /C: /� ?/
PROJECT
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ADDRESS ,6je - i'
DATE TRANSMITTED_
STAFF COORDINATOR
4'%
RESPONSE REQUESTED BY 94*
DATE RESPONSE RECEIVED
ITEM COMMENT
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Date: �- ?-- ?/ Comments prepared by: , ��.
:ITY OF TUKWILA
'EPARTMENT OF COMMUNITY DEVELOPMENT
Building Planning'
'ROJEC /2
.DDRESS 4wiy
ENVIRONMaITAL REVIEW
ROUTII7G FORM
EPIC: - /I —?;'
LATE TRANSMITTED
,TAFF COORDINATOR 1,p,/,e ' `Z;
RESPONSE REQUESTED BY 9//2A,-,-;/
DATE RESPONSE RECEIVED
The attached environmental checklist. was received regarding this project:. Please reviewa
comment below to advise the responsible official regarding the threshold determinationw; . _.
environmental review file is available in the Planning Department through the above staK
coordinator. Comments regarding the project you wish carried to the planning 'Commissfon, .
Board of Adjustment and City Council should be submitted In the comment section. below.
r z,
ITEM
COMMENT
uvunvoro iavatZ
)ate: y3 -9/ Comments prepared by: .
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:ITV OF TUKWILA
EPARTMENT OF COMMUNITY DEVELOPMENT
Building
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RESPONSE REQUESTED BY 4//
DATE RESPONSE RECEIVED
The attached environmental checklist was received regarding this- project.° Please reviewu4an�
comment below to advise the responsible official regarding the threshoididetetmination: 1'ho'
environmental review_ file is available in the Planning Department through the above s6taff
Coordinator. Comments regarding the project you wish carried to the Planning: Commission, y ^"
:Board of Adjustment and City Council should be submitted in. .the comment section below.
ITEM
COMMEN T
PAGE 5 -ITEM # 2 -AIR: QUESTION;
IS THERE ANY POTENTIAL FOR ARSENIC TO BE TRANSMITTED
INTO ATMOSPHERE VIA THE PROCESS
•
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Attachment to Utility Permit Application
Description of Project
Boeing Thompson /Isaacson Project
8701 E. Marginal Way
Seattle, WA
This project involves the excavation and stabilization of
soils possibly containing arsenic. The soil will be
stabilized on site using a Silica /Cement Stabilization
Process. After the soils have been processed they will be
tested to assure they have been effectively stabilized.
Soils that pass the testing will be placed back into the
excavation and compactedto 95 %.
During this project, all soil after excavation, during
stabilization and while awaiting test results, (prior to
placing back into the excavation), will be covered and
placed into a containment area. All water from the
containment area will be pumped into temporary holding
tanks, sampled and discharged according to applicable
regulations. The Containment Area is identified on the
attached Site Plan.
The excavation area for this project is identified on the
attached Site Plan. Water run -off from the excavation area
will not be an issue, because the depth of the excavation is
anticipated to be 11 -12 feet with the sides of the
excavation sloped inward per OSHA safety requirements. It
is anticipated that the excavation area once backfilled will
be brought flush with or slightly lower than the elevation
of the surrounding area.
Boeing has been in close contact with the Washington State
Department of Ecology (WDOE) on the development and
implementation of this project.
The WDOE has requested Boeing accomplish the excavation and
stabilization of the soil for this project in two phases,
the first phase will involve the excavation of 4,000 cubic
yards beginning, approximately April 15, 1991 and the second
phase will involve the excavation of 36,000 cubic yards of
soil beginning, approximately May 20, 1991.
l FF,' r�� hill/ -
(VLG - -J
MAR 25 1991
OF 1;;ki -i,:A
PLANNING DEPT.
ISAACSON /THOMPSON SITE
SOIL STABILIZATION
March 22, 1991
22
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1991
Tasks
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Construction - Stabilization
Area
Excavation -Phase I
Soil Stabilization
(Phase I)
Construction - Stabilization
Area
Excavating -Phase II
Soil Stabilization
(Phase II)
Backf i l l
Site Clean Up & Demob.
(All Contractors)
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26
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7
• UTILITY PERM APPLICATION
CITY OF TUKWILA
Central Permit System - Engineering Division
6300 Southcenter Blvd., Tukwila, WA 98188
Phone: (206) 433 -0179
PLAN CHECK
NUMBER:
PROJECT :' Site Address: 8 7 01 E. Marginal Way
INFORMATION Nameof Projectsoi 1 Stobi l i zat<i oa Project
Property Owner: The Boeing Company
Street Boeing Military Airplanes
Engineer:
Street Address:
Division
Contractor:SME Corporation (Mike Johnson)
Street Address: 2302 A Street
King County Assessor Account Number:
❑ Channelization/Striping/Signing
❑ Curb Cut/Access/Sidewalk
❑ Fire Loop/Hydr. (main to vault) - No.:
❑ . Flood Zone Control
K3 Grade/Fill 4 0 .0 0 E ubic yards ( E a v a t ion)
❑ Hauling 4,000 P se 'I
❑ Landscape Irrigation 36,000 Phase I I
❑ Moving an Oversized Load
❑ Sanitary Side Sewer - No.:
❑ Sewer Main Extension
Private ❑ Public ❑
PERMITS
REQUESTED
(.See Atta ed)
Phone o.:
City /S . te/Zip:
hone No.:
ity /State/Zip:
Phone No.: 572 -3822
City /State /Zip: Tacoma WA 98402
❑ Storm Drain
❑ Street Use
tzes: ❑ Water Main Extension
Private ❑ Public ❑
❑ Water Meter / Exempt: - No.: _ Sizes.
Deduct ❑ Water Only ❑
❑ Water Meter / Permanent - No • — Sizes
❑ Water Meter / Temporary:- No.: — Sizes•-
❑ Other:
WATER METER
DEPOSIT/
REFUND /BILLING
Name:
Street
MONTHLY Name:
SERVICE
BILUNGS TO: Street
❑ Water ❑ Sewer
DESCRIPTION OF PROJECT
❑ Multiple - Family Dwelling
No. of Units:
® Commerciat/lndustri
MISCELLANEOU
INFORMATION;,
Phone No.:
❑ Metro ❑ Standby
❑ Single- Family Residential
❑ Duplex
❑ Triplex
❑ Warehouse
El Hotel
❑ Motel
❑ Office
City/State/Zip:
Phone No.:
City /State/Zip:
❑ Apartments
❑ Condominiums
❑ Other:
❑ Church
❑ Retail
❑ New Building
Square
Footage:
King County Assessor's valuation of existing structures: $
❑ Manufacturing
❑ Remodel/
Addition
HEREBY CERTIFY THAT 1 H / - •
Applicant/Authorized WAWA /.iNNINIr
A. : i•n. r: -44WORMWOMTINIMIMMIMMa
❑ Hospital
Square footage of original building space:
Square footage of additional building space:
Valuation of work to be done: $
❑ .School/College /University
❑ Other:
APPLICATION AND KNOW THE SAME TO BE TRUE AND CORRECT.
Contact Person
Print Name:
Date: Phone: 544-2861
Date Application Accepted:
Jim
t
on
e
Address: P.O. Box 3707., MS 7E -.EJ
Seattle WA 98124 Phone:393 -4715
Date Application Expires:
09/18/90
A97OE/NG
The Boeing Company
P.O. Box 3707
Seattle, WA 98124 -2207
March 22, 1991
4- 1241 -JSW -227
•
Rick Biller
Department of Community Development Director
Department of Community Development
6300 Southcenter Boulevard
Tukwila, Washington 98188
Subject: Application for Land - Altering Permit with the
City of Tukwila for the Boeing
Thompson /Isaacson Site
Dear Mr. Biller
Enclosed are the materials requested by the City of
Tukwila to issue a Land - Altering Ordinance (LAO)
Permit. Four sets of information are being turned into
Tukwila's Department of Public Works and to the
Department of Community Development. It is hoped that
this well help reduce the time frafne for the LAO review
process.
The following items are enclosed as requested for the
LAO permit:
i) Site Plan
ii) Record of Survey for the Thompson /Isaacson Site
iii) Site Engineering Plans for the Temporary Soil
Stabilization Site
iv) Washington Department of Ecology (WDOE) approval
letter for Phase I of the Soil Stabilization
Project
v) Utility Permit Application for
a. Grade /fill permit (pre 1591 Ordinance form)
b. Land - Altering permit (1591 Ordinance form)
vi) Attachments to the Utility Permit Application for
LAO permit (Ordinance. No. 1591)
vii) SEPA Environmental Check List
Pit_, 1% . j %r-' !J 1
MAR 2 5 1991
Ci Y OF TU:°a IL;A
t_1voE!TJC ! EDT.
ATOE /AW
Again, we would appreciate your expeditious review of
this application. Please feel free to contact me at
393 -4715 if you have any questions or need additional
information.
Very truly yours,
CORPORATE SAFETY, HEALTH, AND ENVIRONMENTAL AFFAIRS
J. Scott Wilbur
Project Manager
Environmental Projects
Phone:(206) 393 -4715
M/S 7E -EJ
cc: Ross Heller, Department of Public Works, City of
Tukwila
Enclosure
"'TUKWILA (��i��;�r�r;nnr. ENVIR NMENTAL!ORDIINANC _I RECEIVED
mVOFTUKWILA
TSAR 2E 1991i MAR 2 2 1991
Li r Y OF 'i UK'v..ILA PERMITCENTER
A. BACKGROUND: C'I._"afillUC D PT
1. Name of proposed project, if applicable:
The Boeing Thompson /Isaacson Site Soil Stabilization
Projects.
2. Name of Applicant:
The Boeing Company
Boeing Military Airplane Division
3. Address and phone number of applicant and contact person:
Applicant:
The Boeing Company
P.O. Box 3707
MS 7E -EJ
Seattle, WA 98124 -2207
Contact Person: J.Scott Wilbur
EnviironmentalProjects
(206) 393 -4715
4. Date checklist prepared:
15 March 1991
5. Agency requesting checklist:
City Of Tukwila
6. Proposed timing or schedule (including phasing, if
applicable):
START (Phase I) (Phase II) COMPLETE
April to May 1991 June to October 1991 October 1991
1
•
TUKWILA ENVIRONMENTAL ORDINANCE
7. a) Do you have any plans for future additions, expansion,
or further activity related to or connected with this
proposal? If yes, explain.
After the soils have been treated and tested to assure their
stability, they will be placed back in the excavation site.
After the Stabilization project has been completed a.
proposed Boeing facility may be constructed at the site.
b). Do you own or have options on land nearby or adjacent
to this proposal? If yes, explain.
Yes, several parcels of land in vicinity of htis project are
owned by Boeing.
8. List any environmental information you know about that has
been prepared, or will be prepared, directly related to this
proposal.
Several environmental assessments have been conducted at the
site. The results of these assessments have been submitted
to the Washington Department of Ecology (WDOE). Details of
these assessments can be made available upon request.
9. Do you know whether applications are pending for
governmental approvals of other proposals directly affecting .
the property covered by your proposal? If yes, explain.
The project will be approved by WDOE before any
Stabilization work is started. We currently have approval
for the first phase of this project.
10. List any government approvals or permits that will be needed
for your proposal, if known:
We expect to obtain approval from the WDOE for this project.
A grade and fill permit will be requested from the City Of
Tukwila.'
2
i •
TUKWILA ENVIRONMENTAL ORDINANCE
11. Give brief, complete description of your proposal, including
the proposed uses and the size of the project and site.
There are several questions later in this checklist that ask
you to describe certain aspects of your proposal. You do
not need to repeat those answers on this page.
Soils containing Arsenic(>200ppm) will be excavated at this
site. These excavated soils will then be stabilized on site
using a silica /cement Stabilization process. After the
soils have been treated, they will be tested (TCLP) to
assure that they have been effectively stabilized. Soils
that pass the TCLP testing will be then be placed back into
the excavation. All soils will be covered or will be
contained after excavation, during Stabilization and before
placing back into the excavation.
12. location of the proposal. Give sufficient information to a
person to understand the precise location of your proposed
project, including a street address, if any, and section,
township, and range, if known. If a proposal would occur
over a range of area, provide the range or boundaries of the
sit'e(s). Provide a legal description, site plan, vicinity
map, and topographic map, if reasonably available. While
you should submit any plans required by the agency, you are
not required to duplicate maps or detailed plans submitted
with any permit application related to this checklist.
(North Portion) Boeing Thompson- Isaacson site
8701 East marginal Way So.
Tukwila, WA
Site Map attached. Other Drawings submitted with permit
Application.
13. Does the proposed action lie within the Aquifer Sensitive
Area (ASA)? The General Sewer Service Area? The Priority
Sewer Service Area? The City of Spokane? (See Spokane
County's ASA Overlay Zone Atlas for boundaries).
Not to our knowledge. No excavation will occur within a 200
ft setback zone from the Duwamish River.
3
•
TUKWILA ENVIRONMENTAL ORDINANCE
TO BE COMPLETED BY APPLICANT
B. ENVIRONMENTAL ELEMENTS:
1. Earth:
a. General description of site : Flat, rolling, hilly,
steep slopes, mountains, other
Flat
b. What is the steepest slope on the site (approximate
percent slope)?
The steepest slope at the site is about 1 %.
c. What general types of soils are found on the site (for
example, clay, sand, gravel, peat, muck)? If you know
the classification of agricultural soils, specify them
and note any prime farmland.
The soils present at the site are composed of fine
grain silt & sand sized materials with some gravels.
Much of the site has been filled to it's present grade
during the past 50 years.
d. Are there surface indications or history of unstable
soils in the immediate vicinity? If so, describe.
None are present.
e. Describe the purpose, type, and approximate quantities
of any filling or grading proposed. Indicate source
of fill.
The project is a soil Stabilization project which will .
include the following: Excavation of soils, their
treatment(Stabilization), testing of treated soils.
Those soils which pass the treatment testing will be
placed back into the excavation site and compacted.
SOils that fail testing will be retreated and tested
to assure stabilization.
f. Could erosion occur as a result of clearing,
construction, or use? If so, generally describe.
No. The site is flat level area which is covered with
a surface of concrete or asphalt. All excavated soils
will be covered with plastic. Areas where excavated
soils will be placed will be protected from water run -
on and have a storm water collection system engineered
for the project.
4
• .
TUKWILA ENVIRONMENTAL ORDINANCE
g. About what percent of the property will be covered
with impervious surfaces after project construction
(for example, asphalt or buildings)?
After the Stabilization project has been completed,
Boeing is proposing to construct a manufacturing
facility on the site. The percentage coverage of the
site is not known at this time.
h. Proposed measures to reduce or control erosion, or
other impacts to the earth, if any:
Erosion is not expected to occur during this project.
See answer B(1) (f) above.
2. Air:
a. What type of emissions to the air would result from
the proposal (i.e. dust, automobile, odors,
industrial, wood smoke) during construction and when
the project is completed? If any, generally describe
and give approximate quantities if known.
There is a possibility of some minor dust from
excavation activities.
b. Are there any off -site sources of emissions or odor
that may affect your proposal? If so, generally
describe.
None.
c. Proposed measures to reduce or control emissions or
other impacts to air, if any:
Dust control will be handled by the following methods:
wetting ground surfaces, covering excavated soil piles
with plastic & /or clay caps, and the holding of soils
in containers.
5
•
TUKWILA ENVIRONMENTAL ORDINANCE
3. Water:
a. Surface:
1) Is there any surface water body on or in the
immediate vicinity of the site (including year round
and seasonal streams, saltwater, lakes, ponds,
wetlands): If yes, describe type and provide names,
If appropriate, state what stream or river it flows
into.
The Duwamish waterway is in the vicinity of this
project but is more than 200' from any of the
Stabilization activities. All surface water run off
from the project site which comes into contact with
excavated soil will be collected and stored in tanks.
The tanked water will be used in the Stabilization
process. Collected water that is not used in the
process will be tested to determine if it can be
discharged to Metro or has to be disposed of.
2) Will the project require any work over, in, or
adjacent to (within 200 feet) the describe waters? If
yes, please describe and attach available plans.
None of the Stabilization project activities will not
be conducted within 200' of the Duwamish waterway
shoreline.
3) Estimate the amount of fill and dredge material
that would be placed in or removed from surface water
or wetlands and indicate the area of the site that
would be affected. Indicate the source of the fill
material.
None.
4) Will the proposal require surface water
withdrawals or diversions? Give general description,
purpose, and approximate quantities if known.
None.
5) Does the proposal lie within a 100 -year
floodplain? If so, note location on the site plan.
The entire site is situated above the 100 year flood
plan of the Duwamish Waterway.
6) Does the proposal involve any discharges of waste
materials to surface waters? If so, describe the type
of waste and anticipated volume of discharge.
No.
b. Ground:
TUKWILA ENVIRONMENTAL ORDINANCE
1) Will ground water be withdrawn, or will water be
discharged to ground water? Give general description,
purpose, and approximate quantities of known.
No.
2) Describe waste material that will be discharged
into the ground from septic tanks or other sanitary
waste treatment facility. Describe the general size of
the system. the number of such systems, the number of
houses to be served (if applicable), or the number of
persons the system(s) are expected to serve.
None.
3) Describe any systems, other than those designed
for the disposal of sanitary waste, installed for the
purpose of discharging fluids below the ground surface
(including systems such as those for the disposal of
storm water or drainage from floor drains). Describe
the type of system, the amount of material to be
disposed of through the system and the types of
materials likely to be disposed of (including
materials which may enter the system and the types of
materials likely to be disposed of (including
materiels which may enter the system inadvertently
through spills or as a result �f fire fighting
activities).
N/A
4) Will any chemicals (especially organic solvents
or petroleum fuels) be stored in above ground or
underground storage tanks? If so, what types and
quantities of materials will be stored?
N/A
5) What protective measures will be taken to insure
that leaks or spills of any chemicals stored or used
on site will not be allowed to percolate to ground
water (this includes measures to keep chemicals out of
disposal systems described in 3b(2) and 3b(3)
N/A
1 •
TUKWILA ENVIRONMENTAL ORDINANCE
c. Water Runoff (including storm water):
1) Describe the source of runoff (including storm
water) and method of collection and disposal, if any
(include quantities, if known). Where will this water
flow? Will this water flow into other waters? If so,
please describe.
Storm waters coming in contact with the soil
Stabilization project site will be collected by a
collection and containment system engineered
specifically for this project. See project plan for
specific details of the collection system. In
general, two types of storm water run off will be
collected from the site, non - contact run off water and
contact run off water. Non - contact run off water is
defined for the project as water that has been
collected off the plastic covering the piles. These
waters will be collected and contained separately from
the contact runoff waters. Contact runoff waters are
defined for this project as waters that have come in
contact with excavated materials. These contact
runoff waters will be collected and contained
separately from the non - contact runoff water.
Non- contact run off waters will be discharged to the
'storm sewer system at the site. Contact runoff water
will be collected, tested and used in the
Stabilization process, if practical, or sent to Metro
or other applicable off -site facility.
2) Will any chemicals be stored, handled or used on
the site in a location where a spill or leak will
drain to surface or ground water or to a storm water
disposal system discharging to a surface or ground
water?
No.
8
TUKWILA ENVIRONMENTAL ORDINANCE
3) Could waste materials enter ground or surface
waters? If so, please describe.
d. Proposed measures to reduce or control surface,
ground, and runoff water impacts, if any (if the
proposed action lies within the AQUIFER SENSITIVE AREA
be especially clear on explanations relating to
facilities concerning sections 3b(4), 3b(5), or 3c(2)
of this checklist).
Strict controls, including a system to isolat
e the treatment area, will be taken to minimize
surface water runoff from entering the excavation
site. An engineered collection system has been
developed for this project.(See project plan).
Any surface water runoff comming in contact with the
sediments will be collected in tanks.
4. Plants:
a. Check or circle type of vegetation found on the site:
deciduous tree: alder, maple, aspen,
other.
evergreen tree: fir cedar, pine, other.
shrubs.
grass.
pasture.
crop or grain.
wet soil plants: cattail, buttercup,
,bullrush, skunk cabbage, other.
Water plants: water lily, eelgrass,
millfoil, other.
other types of vegetation.
b. What kind and amount of vegetation will be removed or
altered?
None.
c. List threatened or endangered species known to be on or
near the site.
None.
d. Proposed landscaping, use of native plants, or other
measures to preserve or enhance vegetation on the
site, if any:
None:
9
• •
TUKWILA ENVIRONMENTAL ORDINANCE
5. Animals:
a. Circle any birds and animals which have been observed
on or near the site or are known to be on or near the
site:
(Birds): hawk, heron, eagle, songbirds,
other: Seagulls
Mammals: deer, bear, elk, beaver, other:
Fish: bass, salmon, trout, herring, shellfish,
other:
b. List any threatened or endangered species known to be
on or near the site.
None.
c. Is the site part of a migration route? If so,
explain.
The Duwamish Waterway is a known migratory route for
salmon. Note the Stabilization project will not
discharge any materials to the waterway.
d. Proposed measures to preserve or enhance wildlife, if
any:
N /A.
6. Energy and Natural Resources:
a. What kinds of energy (electric, natural gas, oil, wood
stove, solar) will be used to meet the completed
project's energy needs? Describe whether it will be
used for heating, manufacturing, etc.
N /A.
b. Would your project affect the potential use of solar
energy by adjacent properties? If so, generally
describe.
No.
c. What kinds of energy conservation features are
included in the plans of this proposal? List other
proposed measures to reduce or control energy impacts,
if any:
None.
10
•, !
TUKWILA ENVIRONMENTAL ORDINANCE
7. Environmental Health:
a. Are there any environmental health hazards, including
exposure toxic chemicals, risk of fire and explosion, spill,
or hazardous waste, that could occur as a result of this
proposal? If so, describe.
A detailed Health &.Safety Plan has been worked up for this
project and has been included here for review and comment.
1) Describe special emergency services that might be
required.
See Health & Safety Plan.
2) Proposed measures to reduce or control environmental
health hazards, if any:
See Health & Safety Plan.
b. Noise
1) What types of noise exist in the area which may affect
your project (for example: traffic, equipment,
operation, other)?
None.
What types and levels of noise would be created by or
associated with the project on a short -term or a long-
term basis (for example: traffic, construction,
operation, other)? Indicate what hours noise would
come from site.
Typical construction machinery noise will
beencountered during the project. No night time
operations are expected for this project.
3) Proposed measures to reduce or control noise impact,
if any:
See Health & Safety Plan.
11
• •
TUKWILA ENVIRONMENTAL ORDINANCE
8. Land and Shoreline Use:
a) What is the current use of the site and the
adjacent properties?
Industrial Sites.
b) Has the site been used for agriculture? If so,
describe.
Unknown.
c) Describe any structures on the site.
Small structure formerly used for Boeing Offices.
d) Will any structures be demolished? If so, which?
No.
e) What is the current zoning classification of the
site?
Industrial.
Restricted Industrial.
f) What is the current comprehensive plan
designation of the site?
Unknown.
g) If applicable, what is the current shoreline .
master programs designation of the site?
Not under the shoreline zone master plan (more than
200' from the shoreline).
h) Has any part of the site been classified as an
"environmentally sensitive" area? If so, specify.
No. .
i) Approximately how many people would reside or .
work in the completed project?
N /A.
12
• i
TUKWILA ENVIRONMENTAL ORDINANCE
9. Housing:
j) Approximately, how many people would the
completed project displace?
None
k) Proposed measures to avoid or reduce
displacement impacts, if any:
N /A.
1) Proposed measures to ensure the proposal is
compatible with existing and projected land uses and
plans, if any:
N /A.
a) Approximately how many units would be provided,
if any? Indicate whether high, middle, or low- income
housing.
N /A.
b) Approximately how many units, if any would be
eliminated? Indicate whether high, middle, or low -
income housing.
N /A.
c) Proposed measures to reduce or control housing
impacts, if any:
N /A.
10. Aesthetics:
a) What is the tallest height of any proposed
structure(s), not including antennas; what is the
principle exterior building material(s) proposed?
Process equipment will be less than 20' in height.
b) What views in the immediate vicinity would be
altered or obstructed?
None.
c) Proposed measures to reduce or control aesthetic
impacts, if any:
N /A.
13
• •
TUKWILA ENVIRONMENTAL ORDINANCE
11. Light and Glare:
a. What type of light or glare will the proposal
produce? What time of day would it mainly occur?
12. Recreation
•
Project will operate during daylight hours only.
b. Could light or glare from the finished project
be a safety hazard or interfere with views?
N /A.
c. What existing off -site sources of light or glare
may effect your proposal?
N /A.
d. Proposed measures to reduce or control light and
glare impacts, if any:
N /A.
a. What designated and informal recreational
opportunities are in the immediately vicinity?
River activities (e.g; canoeing,boating. etc).
b. Would the proposed project displace any existing
recreational uses? If so, describe.
No.
c. Proposed
on recreation,
be provided by
N /A.
measures to reduce or control impacts
including recreation opportunities to
the project or applicant, if any?
14
111 UKWILA ENVIRONMENTAL ORDINANCE
13. Historic and Cultural Preservation:
a. Are there any places or objects listed on, or
proposed for, national, state, or local preservation
registers known to be on next to the site? If so,
generally describe.
No.
b. Generally describe any landmarks or evidence of
historic, archaeological, scientific, or cultural
importance known to be on or next to the site.
None.
c. Proposed measures to reduce or control impacts,
if any:
N /A.
14. Transportation:
a. Identify public streets and highways serving the
site, and describe proposed access to the existing
street system. Show on site plans, if any.
Project site lay out is illustrated and described in
the project plan document. The project site is
bordered by E. Marginal Way to the East. Traffic
entering the site will do so through the Boeing gate
located at the Thompson site.
b. Is the site currently served by public transit?
If not, what is the approximate distance to the
nearest transit stop?
N /A.
c. How many parking spaces would the completed
project have? How many would the project eliminate?
N /A.
d. Will the proposal require any new roads or
streets, or improvements to existing roads or streets,
not including driveways? If so, generally describe
(indicate whether public or private).
N /A.
15
• •
TUKWILA ENVIRONMENTAL ORDINANCE
e. Will the project use (or occur in the immediate
vicinity of) water, rail, or air transportation? If
so, generally describe.
The Isaacson site is located on the shore of the
Duwamish waterway. A railroad line parallels the
eastern boundary of the property. The King County
Airport is .just to the East of East Marginal Way which
also parallels the eastern boundary.
f. How many vehicular trips per day would be
generated by the completed project? If known,
indicate when peak volumes would occur.
The project expects to receive ten semi truck
deliveries per day during the six months of the
project.
g. Proposed measures to reduce or control
transportation impacts, if any:
Deliveries will be scheduled to occur during off -peak
traffic hours.'
15. Public Services:
a. Would the project result in an increased need
for public services (for example: fire protection,
police protection, health care, schools, other)? If
so, generally describe.
N /A.
b. Proposed measures to reduce or control impact on
public services, if any:
N /A.
16. • Utilities:
a. Circle utilities currently available at the
site: electricity, natural gas, water, refuse service,
telephone, sanitary sewer, septic system, other.
None.
b. Describe the utilities that are proposed for the
project, the utility providing the service, and the
general construction activities on the site or in the
immediate vicinity which might be needed.
Contractor will provide generator for site electric
needs and process water that will be used on the site.
16
• •
TUKWILA ENVIRONMENTAL ORDINANCE
C. Signature:
I, the undersigned, swear under penalty of perjury that the above
responses are made truthfully and to the best of my knowledge. I
also understand that, should there be any willful
misrepresentation or willful lack of full disclosure on my part,
the AGENCY may withdraw any determination of nonsignificance that .
it might issue in reliance upon this checklist.
Date: Proponent:
Proponent:
Person completing form:
FOR STAFF USE ONLY
Staff Member(s) Reviewing
Checklist:
of applicant
. Johnstone
Boeing Military Airplanes
P.O. Box 3707 M/S 46 -87
Seattle, WA 98124 -2207
206 - 931 -6911
J. Scott Wilbur
P.O.Box 3707 M/S 7E -EJ
Seattle, WA 98124 -2207
206 - 277 -3351
Based on this review of the environmental checklist and other pertinent
information, the staff:
A. Concludes that there are no probable significant adverse
impacts and recommends a determination of nonsignificance.
B. Concludes that probable significant adverse environmental
impacts do exist for the current proposal and recommends a mitigated
determination of nonsignificance with conditions.
C. Concludes that there are probable significant adverse
environmental impacts and recommends a determination of significance.
17
TUKWILA ENVIRONMENTAL ORDINANC
D. Supplemental For Non - Project Actions
(Do not use this sheet for project actions)
Because these questions are very general, it may be helpful to
read them in conjunction with the list of elements of the
environment.
When answering these questions, be aware of the extent the
proposal, or the types of activities likely to result from the
proposal, would affect the item at a greater intensity or a faster
rate than if the proposal were not implemented. Respond briefly
and in general terms.
1) How would this proposal be likely to increase discharge
to water; emissions to air; production, storage, or
release of toxic or hazardous substances; or production of
noise.
This project is being initiated in order to stabilize soils
containing arsenic in order to prevent any migration of the
arsenic off the site through groundwater or surface water.
Proposed measures to avoid or reduce such increases are:
The total project has been initiated and designed to
stabilize any possible off site migration of metals of
concern.
2) How would the proposal be likely to affect plants,
animals, fish or marine life? '
No impact
Proposed measures to protect or conserve plants, animals,
fish, or marine life are:
N /A.
18
•
TUKWILA ENVIRONMENTAL ORDINANCP
3) How would the proposal be likely to deplete energy
or natural resources?
N /A.
Proposed measures to protect or conserve energy and natural
resources are:
N /A.
4) How would the proposal be likely to use or affect
environmentally sensitive areas designated (or eligible or
under study) for governmental protection; such as
parks, wilderness, wild and scenic rivers, threatened or
endangered species habitat, historic or cultural sites,
wetlands, floodplains, or prime farmlands?
N /A.
Proposed measures to protect such resources or to
avoid or reduce impacts are:
N /A.
5) • How would the proposal be likely to affect land
and shoreline use, including whether it would allow or
encourage land or shoreline uses incompatible with
existing plans?
N /A.
Proposed measures to avoid or reduce shoreline and
land use impacts area:
N/A.
How does the proposal conform to the Tukwila
shoreline Master Plan?
N /A.
TUKWILA ENVIRONMENTAL ORDINANC
6. How would the proposal be ,likely to increase demands
on transportation or public services and utilities?
N /A.
Proposed measures to reduce or respond to such demands are:
N /A.
7) Identify, if possible, whether the proposal may
conflict with local, state, or federal laws or requirements
for the protection of the environment.
No conflicts
8) Does the proposal conflict with policies of the
Tukwila Comprehensive Land Use Policy Plan? If so, what
policies of the Plan?
Not to our knowledge
Proposed measures to avoid or reduce the conflict(s) are:
N /A.
•
TUKWILA ENVIRONMENTAL ORDINANCt
D. SUPPLEAENTAL SHEET FOR ALL PROJECT AND NON PROJECT PROPOS
ALS
The objectives and the alternative means of reaching the
objectives for a proposal will be helpful in reviewing the
aforegoing items of the Environmental Checklist. This
information provides a general overall perspective of the proposed
action in the context of the environmental information provided
and the submitted plans, documents, supportive information,
studies, etc.
1) What are the objectives . of the proposal?
The objectives are to stabilize soils containing arsenic in
order to prevent any migration of the arsenic off the
site through groundwater or surface water.
2) What are the alternative means of accomplishing these
objectives?
The primary alternative method for accomplishing the
objective would be to truck the soil off site to a disposal
site.
3) Please compare the alternative means and indicate the
preferred course of action:
The Boeing Company believes that the most environmentally
sound method of addressing these soils is stabilization.
The trucking option is less favorable than the
stabilization alternative . for the following reasons: (1) the
trucking option will involve 1,500 truck runs to transport
the soil to a disposal site and (2) the trucking and
disposal option is not.a permanent solution.
4) Does the proposal conflict with policies of the
Tukwila Comprehensive Land Use Policy. Plan? If so, what
policies of the plan?
No known conflicts
Proposed measures to avoid or reduce the conflict(s) are:
N/A
21
SPECIFICATIONS
FOR
TEMPORARY ON -SITE SOIL STABILIZATION AREA
Prepared for:
The Boeing Company
Boeing Support Services
P.O. Box 3707, MS 7E-ET
Seattle, WA 98124 -2207
Prepared by:
Parametrix, Inc.
1231 Fryar Avenue
P.O. Box 460
Sumner, WA 98390
February 1991
Prepared By: �_.lrvv—'cy
Checked By:
Approved
Proj ct Manager
. •:,
1 MAR 25 1991.
t.rrY OF TUKWILA
Pi A.NNUJG DEPT.
OO
+ +'may -.
vs
��
NOTE REVISIONS: ADDITIONS ARE SHOWN IN ITALICS.
STANDARD SPECIFICATIONS AND AMENDMENTS
The Standard Specifications for this project shall be the "1991 Standard Specifications for Road,
Bridge, and Municipal Construction," Divisions Two through Nine (excluding all measurement
and payment sections) prepared by WSDOT /APWA. Standard Plans shall be the "Standard
Plans for Road, Bridge, and Municipal Construction," prepared by WSDOT /APWA.
Work under this Contract shall be performed in accordance with the Standard Specifications
referred to above and the Special Provisions which follow. The requirements of the Special
Provisions shall take precedence over the Standard Specifications adopted by the
WSDOT /APWA.
Boeing, Onsite Stabilization March S, 1991 Revisions
Specifications PMX #5S- 1982 -01
SPECIAL PROVISIONS
DIVISION 2 - EARTHWORK
SECTION 2 -03 ROADWAY EXCAVATION AND EMBANKMENT
2- 03.3(14)D Compaction and Moisture Control Tests
Supplement this Section with the following;
Maximum density and optimum moisture for granular material shall be determined using
test method ASTM D -1557. In place density and moisture content will be determined
using Nuclear Gauge using test method ASTM D -2922 and ASTM D -3017, respectively.
2 -06 SUBGRADE PREPARATION
2 -06.1 Description
Supplement this Section with the following;
This work also includes preparing the existing sand (placed by others) for HDPE liner
placement and preparing existing subgrade and sand (placed by others) around catch
basin excavations (as required) prior to placement of liner and catch basins. The
existing subgrade and sand shall be prepared per Section 2- 06.3(1) Subgrade for
Surfacing, except that compaction shall achieve 85 percent of the maximum density for
existing subgrade and 90 percent for sand.
Boeing, Onsite Stabilization March S, 1991 Revisions
Specifications 2 -1 PMX #55- 1982 -01
DIVISION 4 - BASES
SECTION 4 -04 BALLAST AND CRUSHED SURFACING
4- 04.3(4) Placing and Spreading
Supplement this Section with the following;
In areas above the HDPE liner, placing and spreading shall be performed by low ground
pressure (tracked) equipment. No wheeled vehicles will be allowed on the crushed
surface top course until all material has been placed and compaction has been completed.
4- 04.3(5) Shaping and Compacting
Supplement this Section with the following:
Crushed surface top course shall be compacted to a finn and non yielding surface by a
minimum of three passes of a self propelled smooth drum steel roller (no vibration), or
other equipment approved by the Engineer.
Boeing, Onsite Stabilization March S, 1991 Revisions
Specifications 4-1 PMX /155- 1982 -01
DIVISION 5 - SURFACE TREATMENTS AND PAVEMENTS
SECTION 5 -04 ASPHALT CONCRETE PAVEMENT
5 -04.1 Description
Supplement this Section with the following:
Asphalt concrete pavement for this project shall be Class G.
5- 04.3(5)A Preparation of Existing Surfaces
Supplement this Section with the following:
A tack coat of CSS -1 emulsified asphalt shall be applied to the top of the ATB at a
minimum rate of 0.08 gallons per square yard of retained asphalt.
5- 04.3(9) Spreading and Finishing
Supplement this Section with the. following:
Class G asphalt concrete shall be placed in one 4-inch lift.
5- 04.3(19) Sealing of Driving Surfaces
The Contractor shall apply a fog seal of CSS -1 emulsified asphalt at a minimum rate of
0.08 gallons per square yard of retained asphalt.
Boeing, Onsite Stabilization March S, 1991 Revisions
Specifications
5 -1
PMX #55- 1982 -01
DIVISION 6 - STRUCTURES
6 -02 CONCRETE STRUCTURES
6 -02.2 Materials
Supplement this section with the following:
Bentonite shall meet the requirements of Section 9 -04.11
6-02.3(26)G Neat Cement (New Section)
The neat cement shall be mixed in the following proportion:
Type II Portland Cement 1 sack
Water 5.5 gallons (approximately)
Bentonite 3 pounds
The Contractor shall adjust the amount of water to produce a neat cement flow of 15 to 20
seconds (determined by ASTM C -939).
6-10 CONCRETE BARRIER
6- 10.3(6) Placing Concrete Barrier
Supplement this Section with the following:
Perimeter concrete barriers at corners shall be sized, or cut, so that they do not extend
beyond the outside edge of intersecting lines of concrete barriers. Sharp, rough or other
protrusions from concrete barriers which may damage the HDPE liner shall be ground
smooth prior to liner placement. All cut concrete barriers shall be approved by the
Engineer prior to placement.
Boeing, Onsite Stabilization March 5, 1991 Revisions
Specifications 6-1 PMX #55- 1982 -01
DIVISION 7 - DRAINAGE STRUCTURES, STORM SEWERS, SANITARY SEWERS,
WATER MAINS, AND CONDUITS
SECTION 7 -05 MANHOLES, GRATE INLETS, DROP INLETS, AND CATCH
BASINS
7 -05.1 Description
Supplement this Section with the following:
This work shall also include installations of HDPE inserts, observation pipes, and other
miscellaneous items associated with the catch basins.
7 -05.2 Materials
Supplement this Section with the following:
Materials shall meet the requirements of the following Section:
Neat Cement 6- 02.3(26)G
HDPE Inserts 9 -05.19
Filter Fabric 9 -33.3
Pea Gravel 9 -03.15
7 -05.3 Construction Requirements
Supplement this Section with the following:
Excavation for catch basins shall be by others, prior to the beginning of this contract.
Joints between precast catch basin units shall be rubber gasketed. Catch basins shall
have no knock -outs and all interior surface irregularities shall be filled, finished flush,
and shall be approved by the Engineer.
The HDPE inserts shall fit into catch basins. The insert shall be designed as a free
standing liquid container. It shall be tested for leaks prior to delivery. The Contractor
shall supply certification that the inserts have passed the test for leakage.
Boeing, Onsite Stabilization March S, 1991 Revisions
Specifications
7 -1 . PMX /I55- 1982 -01
No bell and spigot shall be used between the catch basin walls and flat slab. The HDPE
insert bottom shall rest firmly on a sand cushion (maximum depth of 3 inches, unless
otherwise approved by the Engineer) placed on the inside bottom of the catch basin. The
depth of the sand cushion shall be adjusted so that the flanges on the HDPE inserts rest
firmly on the flat top of catch basin walls.
If there is any evidence of damage to the HDPE insert prior to, during, or after
installation, at the Engineer's direction the Contractor shall test the insert for leakage.
The insert shall be filled to the top with water and allowed to set for 24 hours. After 24
hours, the insert shall be filled to the top with water again and covered with plastic to
prevent evaporation or water running into the insert.
After 24 hours, the Engineer will measure the water level in the insert. If the water
level drops 1/4 inch or less, the Contractor shall remove the water from the insert.
If more than 1/4 inch of water level drop occurs, the Contractor shall remove the water
from the insert and repair any defect found. The test procedure• will be performed again
until the leakage is less than 1/4 inch.
Observation pipes shall be made out of Schedule 40 PVC pipe. The fittings shall be
F480 flush threads. The bottom 3 feet of the observation pipe shall be 20 slot pipe with
a minimum open area of 7.6 square inches per foot. The 4 -inch expansion plug shall
have an ABS body with urethane o -ring as manufactured by Cherne Industries,
Minneapolis, Minnesota, available from Instrumentation Northwest, Redmond,
Washington, part number • 1 -F -414, or approved equal. The monument and locking cap
shall be 8 inches in diameter and made out of aluminum as manufactured by
Instrumentation Northwest, part number 2- A-045, or approved equal. Monument and
locking cap shall be painted yellow.
Boeing, Onsite Stabilization March 5, 1991 Revisions
Specifications • 7-2 PMX NSS- 1982 -01
DIVISION 8 - MISCELLANEOUS CONSTRUCTION
SECTION 8 -04 CURBS, GUTTERS, AND SPILLWAYS
8- 04.3(2) Extruded Asphalt Concrete Curbs, and Gutters
Supplement this section with the following:
Tack coat shall be CSS -1 emulsified asphalt applied at a minimum rate of 0.08 gallons
per square yard of retained asphalt.
SECTION 8 -27 GEOSYNTHETIC LINER CONSTRUCTION (New Section)
8 -27.1 Description
This work shall consist of furnishing and installing the different components which comprise the
liner system as shown on the plans.
This work shall include the installation of the following:
• HDPE Liner
• Filter Fabric
• Sand
8 -27.2 Materials
Materials shall meet the requirements of the following Sections:
• HDPE Liner
• Filter Fabric
• Sand
9-33.1*
9 -33.2
9 -33.3
*The Owner will supply the 80 mil HDPE Liner, on -site. The Contractor shall supply the 60
mil HDPE liner. '
Boeing, Onsite Stabilization March S, 1991 Revisions
Specifications
8 -1 PMX 1155- 1982 -01
8 -27.3
8-27.3(1)
Installation
Construction Requirements
HDPE Liner
The installation Contractor shall be Northwest Linings, Inc., located in Kent, Washington
([206] 872- 0244). Installation shall be performed in strict accordance with National Seal
Company's 1990 Technical Manual concerning CQA for installation. Except that shear and peal
testing of seams shall be performed at Northwest Laboratories in south Seattle. Copies of test
results shall be delivered to the Engineer within 24 hours of taking destructive test samples from
seams.
The Contractor shall prepare and maintain the subgrade to be lined with HDPE liner in a
condition suitable for installation of the liner as follows:
1. Surfaces to be lined shall be smooth and free of debris, roots, and angular or
sharp rocks larger than three quarter (3/4) inches in diameter to a depth of four
(4) inches. All fill shall consist of well - graded material free of organics, trash,
clayballs, sharp stones or any other deleterious material that may cause damage
to the liner. The subgrade shall be compacted in accordance with the
specifications but in no event below the minimum required to provide a firm
unyielding foundation sufficient to permit the movement of welding equipment
over the subgrade without causing rutting or other deleterious effects. The
subgrade shall have no sudden sharp or abrupt changes in grade.
2. The Contractor shall protect the subgrade from desiccation, flooding and freezing.
Protection, if required, may consist of a thin plastic protective cover (or other
material as approved by the Engineer) installed over the completed subgrade until
such time as the placement of HDPE liner begins. Subgrades found to have
desiccation cracks greater than 1/2 inch in width or depth, or which exhibit
swelling, heaving or other similar conditions shall be replaced or reworked by the
contractor to remove these defects.
3. Surface Acceptance. Northwest Linings, Inc. shall provide the Engineer with a
written acceptance of the surface prior to commencing installation.
A written Warranty shall be obtained from Northwest Linings, Inc. (for workmanship). This
document shall warrant the quality of the workmanship for a period of one (1) year.
Boeing, Onsite Stabilization March 5, 1991 Revisions
Specifications • 8-2 PMX #55- 1982 -01
8- 27.3(2) Filter Fabric
Filter fabric shall be placed as shown on the plans. Additional fabric shall be wrapped around
observation pipes and placed against catch basins to assure overlying material does not pass into
underlying materials. Seams shall be overlapped 12 inches.
8-27.3(3) Sand
Sand will be placed above the HDPE liner and as backfill around catch basins. The Contractor
shall use extreme caution in the placement of the sand over the liner. The sand layer over the
liner shall be placed in one 8 -inch lift. Sand placed as backfill around catch basins shall be
placed in 8 -inch lifts. End - dumping of the sand directly on the liner will not be permitted.
Placement shall be performed with low ground pressure equipment. The sand shall be
compacted to 90 percent relative compaction as measured using the method described in Section
2- 03.3(14)D. No vibratory compaction of the sand layer over the liner will be allowed. Sand
shall be compacted to a firm and non - yielding condition capable of supporting construction
activities associated with installation of overlying materials. Sand shall be moisture conditioned
as necessary to meet the compaction requirements.
The Contractor shall avoid undue stress on the liner at all times. A worker should walk along
side earthmoving equipment and remove all rocks, stones, roots or other debris that could cause
damage to the liner. Equipment operators must avoid sharp turns or quick stops that could pinch
and tear the liner. If damage does occur, it shall be reported to the Engineer immediately so
that repairs can be performed without needless delay.
Cover shall be placed and maintained in a uniform thickness, free of ruts and irregularities.
No work shall be performed on wet cover material that cannot support equipment.
Equipment operators and all other personnel must be qualified and must exercise good judgment
and common sense at all times.
Boeing, Onsite Stabilization March S, 1991 Revisions
Specifications
8 -3
PMX #55- 1982 -01
DIVISION 9 - MATERIALS
SECTION 9 -03 AGGREGATES
9 -03.15 Bedding Material for Rigid Pipe
Supplement this Section with the following:
Pea gravel shall be naturally occurring rounded aggregate. No crushed material shall be
used.
SECTION 9 -04 JOINT AND CRACK SEALING MATERIALS
9 -04.11 Bentonite (New Section)
Bentonite shall be powered with less than 35 percent retained on the #200 mesh. It shall be
Volclay Premium Gel, as manufactured by American Colloid Company, Skokie, Illinois;
Federals Bentonite, as manufactured by Aurora Industries, Inc., Montgomery, Illinois; or
approved equal.
SECTION 9 -05 DRAINAGE STRUCTURES, CULVERTS AND CONDUITS
9 -05.19 HDPE Inserts (New Section)
HDPE inserts shall be manufactured from High Molecular Weight Polyethylene (Black Pipe
Grade) as manufactured by Poly Hi, Menasha Corp., Scranton, Pennsylvania, or approved equal.
SECTION 9 -33 GEOSYNTHETIC COMPONENTS (New Section)
9 -33.1 High- Density Polyethylene Liner (HDPE Liner)
HDPE liner shall be Enviroseal HDPE Geomembrane, 80 mil and 60 mil, as manufactured by
National Seal Co. The Owner will supply the 80 mil HDPE liner on site. Contractor shall
supply the 60 mil HDPE liner.
9 -33.2 Filter Fabric
The filter fabric shall be non -woven geotextile pervious sheet of polypropylene fibers.
Filter fabric shall be Polyfelt TS 500 as manufactured by Polyfelt, Inc., Evergreen, Alabama,
or approved equal.
Boeing, Onsite Stabilization March S, 1991 Revisions
Specifications
9-1
PMX #55- 1982 -01
9 -33.3 Sand
Sand shall be a well graded, clean sand /gravel mixture free from organic matter and shall
conform to the gradation for Class 1 Fine Aggregate per Section 9- 03.1(2)B (WSDOT /APWA),
or approved equal. The sand shall be material which can be compacted to a firm condition
capable of supporting construction activities associated with installation of overlying materials.
Boeing, Onrite Stabilization March S, 1991 Revisions
Specifications
9-2
PMX ASS- 1982 -01
SEC RECORD OF SURVEY FOR ,
77/E JOR6ENSEN CORPORATION '_
R.F • 9004 JO9071
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A.TOPOGRAPHIC SURVEY OF .CONCRETE REMOVAL
THE BOEING COMPANY E SME
' (THE ISAACSON PROPERTY)
A.'PORTION •OF.ABANDONED • SLIP 5. ABANDONED
CHANNEL OF, THE 'DUWAMISH, RIVER
BOYD AND .ASSOC INC
13039 6TH AVE SO
SEATTLE , WA. 98168
(206) 244 -2869
I " AR 793; I . I
869-0
clr.Ny. R. Ay
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