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SEPA Environmental checklist (WAC 197-11-960) July 2016 Page 1 of 14
SEPA ENVIRONMENTAL CHECKLIST
Purpose of checklist:
Governmental agencies use this checklist to help determine whether the environmental impacts of your
proposal are significant. This information is also helpful to determine if available avoidance, minimization
or compensatory mitigation measures will address the probable significant impacts or if an environmental
impact statement will be prepared to further analyze the proposal.
Instructions for applicants:
This environmental checklist asks you to describe some basic information about your proposal. Please
answer each question accurately and carefully, to the best of your knowledge. You may need to consult
with an agency specialist or private consultant for some questions. You may use “not applicable” or
"does not apply" only when you can explain why it does not apply and not when the answer is unknown.
You may also attach or incorporate by reference additional studies reports. Complete and accurate
answers to these questions often avoid delays with the SEPA process as well as later in the decision-
making process.
The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of
time or on different parcels of land. Attach any additional information that will help describe your proposal
or its environmental effects. The agency to which you submit this checklist may ask you to explain your
answers or provide additional information reasonably related to determining if there may be significant
adverse impact.
Instructions for Lead Agencies:
Please adjust the format of this template as needed. Additional information may be necessary to
evaluate the existing environment, all interrelated aspects of the proposal and an analysis of adverse
impacts. The checklist is considered the first but not necessarily the only source of information needed to
make an adequate threshold determination. Once a threshold determination is made, the lead agency is
responsible for the completeness and accuracy of the checklist and other supporting documents.
Use of checklist for nonproject proposals:
For nonproject proposals (such as ordinances, regulations, plans and programs), complete the applicable
parts of sections A and B plus the SUPPLEMENTAL SHEET FOR NONPROJECT ACTIONS (part D). Please
completely answer all questions that apply and note that the words "project," "applicant," and "property or
site" should be read as "proposal," "proponent," and "affected geographic area," respectively. The lead
agency may exclude (for non-projects) questions in Part B - Environmental Elements –that do not
contribute meaningfully to the analysis of the proposal.
A. Background [HELP]
1. Name of proposed project, if applicable: 287 Hanger Addition
2. Name of applicant: Snodgrass Freeman Associates
Exhibit 2
RECEIVED
07/08/2020
amorganroth
PLANNING DIVISION
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3. Address and phone number of applicant and contact person: 7195 Wagner Way 201 Gig
Garbor WA. 98335
4. Date checklist prepared: May 2, 2020
5. Agency requesting checklist: City of Renton
6. Proposed timing or schedule (including phasing, if applicable): Start construction Aug. 2020
Completion Decxember 2020
7. Do you have any plans for future additions, expansion, or further activity related to or
connected with this proposal? If yes, explain.
8. List any environmental information you know about that has been prepared, or will be
prepared, directly related to this proposal. A possible tenant improvement for office use.
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. None.
10. List any government approvals or permits that will be needed for your proposal, if known.
Building permit, SEPA determination of non-significance, Shorline SD
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. (Lead agencies may modify this form to include additional specific information on project
description.) To construct a 4,980 square foot addition to an existing 8,955 square foot aircraft
hanger on a 90,852 square foot leased area or 1.85 acres. The addition will be a pre-engineered
metal building, with a height bof 32 feet
12. Location of the proposal. Give sufficient information for 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 site(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 applications
related to this checklist. The proposed addition is located at 287 Perimeter Road, Renton
Municipal Airport. Parcel No. 072305-9007
B. Environmental Elements [HELP]
1. Earth [help]
a. General description of the site: The site is an airport with nearly 100% impervious cover
(existing) Two large metal buildings exist on the site.
(circle one): Flat, rolling, hilly, steep slopes, mountainous, other _____________
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b. What is the steepest slope on the site (approximate percent slope)? 3%
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
agricultural land of long-term commercial significance and whether the proposal results in
removing any of these soils. The underlaying soils are made up of fill material of ancient
riverbed pete and gravel.
d. Are there surface indications or history of unstable soils in the immediate vicinity? If so,
describe. None.
e. Describe the purpose, type, total area, and approximate quantities and total affected area of
any filling, excavation, and grading proposed. Indicate source of fill. None.
f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe.
None.
g. About what percent of the site will be covered with impervious surfaces after project
construction (for example, asphalt or buildings)? 100% of the area.
h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: Best
practices using silt fencing, and dust control measures.
2. Air [help]
a. What types of emissions to the air would result from the proposal during construction,
operation, and maintenance when the project is completed? If any, generally describe and
give approximate quantities if known. During construction there will be small amounts od dust
and vehicle exhaust.
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: None.
3. Water [help]
a. Surface Water: [help]
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
Cedar River is 75 feet from the eastern lease line. This river flowes into Lake Washington.
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2) Will the project require any work over, in, or adjacent to (within 200 feet) the described
waters? If yes, please describe and attach available plans. Yes. A Shorline Substantial
Development permit will be submitted
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 fill material. None.
4) Will the proposal require surface water withdrawals or diversions? Give general
description, purpose, and approximate quantities if known. Not the we know of.
5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan.
No. It is however a fee feet away/higher to the known Cedar River flood plane
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. None.
b. Ground Water: [help]
1) Will groundwater be withdrawn from a well for drinking water or other purposes? If so,
give a general description of the well, proposed uses and approximate quantities
withdrawn from the well. Will water be discharged to groundwater? Give general
description, purpose, and approximate quantities if known. None is planned.
2) Describe waste material that will be discharged into the ground from septic tanks or
other sources, if any (for example: Domestic sewage; industrial, containing the
following chemicals. . . ; agricultural; etc.). 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 animals or humans the system(s) are expected to serve. None is
propiosed.
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c. Water runoff (including stormwater):
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, describe. All stormwater generated on the
site of the proposed addition wil be directed to an existing stormwater system, then
eventually into the Cedar River.
2) Could waste materials enter ground or surface waters? If so, generally describe. It is
possible, but best practices systems already employed in system including oil watere
seperators are an intrigal part of the existing stormwater system,
3) Does the proposal alter or otherwise affect drainage patterns in the vicinity of the site? If
so, describe. It will not alter any drainage patterns.
d. Proposed measures to reduce or control surface, ground, and runoff water, and drainage
pattern impacts, if any: None are planned.
4. Plants [help]
a. Check the types of vegetation found on the site:
____deciduous tree: alder, maple, aspen, other
____evergreen tree: fir, cedar, pine, other
____shrubs
__x_grass
____pasture
____crop or grain
____ Orchards, vineyards or other permanent crops.
____ wet soil plants: cattail, buttercup, bullrush, skunk cabbage, other
____water plants: water lily, eelgrass, milfoil, other
____other types of vegetation
b. What kind and amount of vegetation will be removed or altered? None.
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c. List threatened and endangered species known to be on or near the site. None are known to
be on the site at this time.
d. Proposed landscaping, use of native plants, or other measures to preserve or enhance
vegetation on the site, if any: None are planned.
e. List all noxious weeds and invasive species known to be on or near the site. None exist to
our knowledge
5. Animals [help]
a. List any birds and other animals which have been observed on or near the site or are known
to be on or near the site.
Examples include:
birds: hawk, heron, eagle, songbirds, other:
mammals: deer, bear, elk, beaver, other:
fish: bass, salmon, trout, herring, shellfish, other ________
b. List any threatened and endangered species known to be on or near the site. None tnhat we
are awarw of.
c. Is the site part of a migration route? If so, explain. Yes. It lies within the North American
flyway. A seasonal migration flyway for native and non-native birds.
d. Proposed measures to preserve or enhance wildlife, if any: None is planned at this time.
e. List any invasive animal species known to be on or near the site. None are known at this time.
6. Energy and Natural Resources [help]
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. Electricty for lighting and power.
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d. Would your project affect the potential use of solar energy by adjacent properties?
If so, generally describe. No. It is not as tall as the adjacient buildings to the north or west.
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 are planed,
as this is an un-heated storage building.
7. Environmental Health [help]
a. Are there any environmental health hazards, including exposure to toxic chemicals, risk
of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal?
If so, describe. None that we are awarw of.
1) Describe any known or possible contamination at the site from present or past uses. No
surface contamination hasn been observed.
2) Describe existing hazardous chemicals/conditions that might affect project development
and design. This includes underground hazardous liquid and gas transmission pipelines
located within the project area and in the vicinity. None that we are aware of.
3) Describe any toxic or hazardous chemicals that might be stored, used, or produced
during the project's development or construction, or at any time during the operating
life of the project. Fuel for the construction vehicles will be used but stored in their on-
board fuel tanks.
4) Describe special emergency services that might be required. Fire and ambulance
services would nbe called in the event of a construction accident.
5) Proposed measures to reduce or control environmental health hazards, if any:
Limiting the hours of operation to reduce air pollution from gas & decile engines,
b. Noise
1) What types of noise exist in the area which may affect your project (for example:
traffic, equipment, operation, other)? The operation of aircraft in and arroundn the site,
but there is no adverse affect on the project.
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3) 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)? Indi-
cate what hours noise would come from the site. During construction the use of
heavey equipment will generate noise, and following construction the noise normaly
associated with aircraft engines will be associated with this project. Constructiion
noise will be limited to the hours between 7:00 AM and 4:30 PM during weekdays.
Aircraft operations are possible 24 hours a day.
3) Proposed measures to reduce or control noise impacts, if any: None.
8. Land and Shoreline Use [help]
a. What is the current use of the site and adjacent properties? Will the proposal affect current
land uses on nearby or adjacent properties? If so, describe. The site is currently occupied by
an aircraft storage hanger that is proposed to ber expanded. No adverse affects are
expected.
b. Has the project site been used as working farmlands or working forest lands? If so, describe.
How much agricultural or forest land of long-term commercial significance will be converted to
other uses as a result of the proposal, if any? If resource lands have not been designated,
how many acres in farmland or forest land tax status will be converted to nonfarm or
nonforest use? The property was a wetland 80 years ago before being filled and paved by
the Boeing Co. but likely was never used for agriculture.
1) Will the proposal affect or be affected by surrounding working farm or forest land normal
business operations, such as oversize equipment access, the application of pesticides,
tilling, and harvesting? If so, how: It will not.
c. Describe any structures on the site. The site is the current home to the Ace Aviation
Company, They have two existing structures that will be attached to the proposed hanger
addition.
d. Will any structures be demolished? If so, what? None will be demolished.
e. What is the current zoning classification of the site? Medium Industrial (M)
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f. What is the current comprehensive plan designation of the site? Industrial (I)
g. If applicable, what is the current shoreline master program designation of the site? Shoreline
high intensity.
h. Has any part of the site been classified as a critical area by the city or county? If so, specify.
It has not nbeen classifies as a critical area.
i. Approximately how many people would reside or work in the completed project? None.
j. Approximately how many people would the completed project displace? None.
k. Proposed measures to avoid or reduce displacement impacts, if any: None.
L. Proposed measures to ensure the proposal is compatible with existing and projected land
uses and plans, if any: None are planned.
m. Proposed measures to reduce or control impacts to agricultural and forest lands of long-term
commercial significance, if any: None.
9. Housing [help]
a. Approximately how many units would be provided, if any? Indicate whether high, mid-
dle, or low-income housing. None.
b. Approximately how many units, if any, would be eliminated? Indicate whether high,
middle, or low-income housing. None.
c. Proposed measures to reduce or control housing impacts, if any: None.
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10. Aesthetics [help]
a. What is the tallest height of any proposed structure(s), not including antennas; what is
the principal exterior building material(s) proposed? The building will be 32 feet high, and will
be constructed entirely of preformes steel structure and siding, Color will be red.
b. What views in the immediate vicinity would be altered or obstructed? None.
f. Proposed measures to reduce or control aesthetic impacts, if any: Secure the services of a
good Architect
11. Light and Glare [help]
a. What type of light or glare will the proposal produce? What time of day would it mainly
occur? Only the western portion of the hanger addition will have exterior lighting. This lighting
may be in use thruoutn the evening hours.
b. Could light or glare from the finished project be a safety hazard or interfere with views? No.
c. What existing off-site sources of light or glare may affect your proposal? None.
d. Proposed measures to reduce or control light and glare impacts, if any: None are planned.
12. Recreation [help]
a. What designated and informal recreational opportunities are in the immediate vicinity? Flying
an airplane for pleasure.
b. Would the proposed project displace any existing recreational uses? If so, describe. No.
c. Proposed measures to reduce or control impacts on recreation, including recreation
opportunities to be provided by the project or applicant, if any: None.
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13. Historic and cultural preservation [help]
a. Are there any buildings, structures, or sites, located on or near the site that are over 45 years
old listed in or eligible for listing in national, state, or local preservation registers ? If so,
specifically describe. None that we are aware of.
b. Are there any landmarks, features, or other evidence of Indian or historic use or occupation?
This may include human burials or old cemeteries. Are there any material evidence, artifacts,
or areas of cultural importance on or near the site? Please list any professional studies
conducted at the site to identify such resources. None that we are aware of.
c. Describe the methods used to assess the potential impacts to cultural and historic resources
on or near the project site. Examples include consultation with tribes and the department of
archeology and historic preservation, archaeological surveys, historic maps, GIS data, etc.
None.
d. Proposed measures to avoid, minimize, or compensate for loss, changes to, and disturbance
to resources. Please include plans for the above and any permits that may be required.
None.
14. Transportation [help]
a. Identify public streets and highways serving the site or affected geographic area and
describe proposed access to the existing street system. Show on site plans, if any. A site
plan is part of thisn submittal, and showesn the primary airport access road named Perimiter
Road” and the adjacient City of Renton sreet system
b. Is the site or affected geographic area currently served by public transit? If so, generally
describe. If not, what is the approximate distance to the nearest transit stop? The Metro Bus
system serves the adjacient primary road system. There is no service on the airport property.
b. How many additional parking spaces would the completed project or non-project
proposal have? How many would the project or proposal eliminate? No additional
parking stalls will be provided. This expansion is exempt from providing any additional
parking spaces.
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d. Will the proposal require any new or improvements to existing roads, streets, pedestrian,
bicycle or state transportation facilities, not including driveways? If so, generally describe
(indicate whether public or private). None will be required.
e. Will the project or proposal use (or occur in the immediate vicinity of) water, rail, or air
transportation? If so, generally describe. There are aircraft charter companies within a mile
of the project.
f. How many vehicular trips per day would be generated by the completed project or proposal?
If known, indicate when peak volumes would occur and what percentage of the volume would
be trucks (such as commercial and nonpassenger vehicles). What data or transportation
models were used to make these estimates? None.
g. Will the proposal interfere with, affect or be affected by the movement of agricultural and
forest products on roads or streets in the area? If so, generally describe. No.
h. Proposed measures to reduce or control transportation impacts, if any: None.
15. Public Services [help]
a. Would the project result in an increased need for public services (for example: fire protection,
police protection, public transit, health care, schools, other)? If so, generally describe. No.
b. Proposed measures to reduce or control direct impacts on public services, if any. None.
16. Utilities [help]
a. Circle utilities currently available at the site:
electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system,
other ___________
g. 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. Electrical power will be provided by Puget Sound Energy. Sanitary waste will be
routed to an existing sanitary sewer system just off site.
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C. Signature [HELP]
The above answers are true and complete to the best of my knowledge. I understand that the
lead agency is relying on them to make its decision.
Signature: David James Freeman
Name of signee David James Freeman
Position and Agency/Organization Architect forn the project developer SFA Architects
Date Submitted: May 10, 2020
D. Supplemental sheet for nonproject actions [HELP]
(IT IS NOT NECESSARY to 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 the 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
at a faster rate than if the proposal were not implemented. Respond briefly and in
general terms.
1. How would the proposal be likely to increase discharge to water; emissions to air; pro-
duction, storage, or release of toxic or hazardous substances; or production of noise?
Proposed measures to avoid or reduce such increases are:
2. How would the proposal be likely to affect plants, animals, fish, or marine life?
Proposed measures to protect or conserve plants, animals, fish, or marine life are:
3. How would the proposal be likely to deplete energy or natural resources?
Proposed measures to protect or conserve energy and natural resources are:
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4. How would the proposal be likely to use or affect environmentally sensitive areas or
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?
Proposed measures to protect such resources or to avoid or reduce impacts are:
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?
Proposed measures to avoid or reduce shoreline and land use impacts are:
6. How would the proposal be likely to increase demands on transportation or public
services and utilities?
Proposed measures to reduce or respond to such demand(s) are:
7. Identify, if possible, whether the proposal may conflict with local, state, or federal laws or
requirements for the protection of the environment.
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