HomeMy WebLinkAboutECF_4th_Dim_SEPA_042825_v1SEPA Environmental checklist September 2023 Page 1
(WAC 197-11-960)
SEPA1 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.
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Background
Find help answering background questions2
1. Name of proposed project, if applicable:
4th Dimension Building
2. Name of applicant:
THINDR LLC
3. Address and phone number of applicant and contact person:
12704 Pacific HWY, SW, Lakewood, WA 98499 – 206.650.0082
4. Date checklist prepared:
17 April 2025
5. Agency requesting checklist:
City of Renton
6. Proposed timing of schedule (including phasing, if applicable):
We hope to begin construction in February, 2026.
7. Do you have any plans for future additions, expansion, or further activity related to or
connected with this proposal? If yes, explain.
No Plans at this time.
8. List any environmental information you know about that has been prepared, or will be
prepared, directly related to this proposal.
Stormwater Site plan, Harmsen Assoc. 4/2025
Geotechnical Report, Geogroup Northwest, Inc., 5/14/2018
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.
City of Renton Building and Grading Permits
10. List any government approvals or permits that will be needed for your proposal, if known.
Building Permit issued by City of Renton
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.)
The project is the construction of a new mixed use building at 4502 NE 4th Street,
Renton, WA. The building will face 4th Street ande Bremerton Ave. with pedestrican
access from both streets and vehicle access from Bremerton. The building will house
49 parking spaces within the building, 34 in the basement and 15 on the ground level.
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Commercial space will also be at grade level (+-6,237 sf). The second third and fourth
levels will feature 8 two bedroom living units each, for a total of 24 units. The fifth floor
will have four two bedroom units. The building will form to the existing topography,
utilizing the existing low spot for the basement parking. The site is 23,170 sf (0.55ac)
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.
4502 NE 4th Street, Renton, WA – APN: 1023059068
Environmental Elements
1. Earth
Find help answering earth questions3
a. General description of the site:
Circle or highlight one: Flat, rolling, hilly, steep slopes, mountainous, other:
b. What is the steepest slope on the site (approximate percent slope)?
There are several retaining walls on site with near vertical slopes. Steepest
vegetated slope is approximately 57% and man made.
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.
Silty soils and fills overlaying apparent dense and competent till, gravelly sand and
sandy gravel.
d. Are there surface indications or history of unstable soils in the immediate vicinity? If
so, describe.
None Known.
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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.
If so, generally describe. Any time that soils is exposed to weather, there is a
chance for erosion. Best Management Practices will be used to limit the threat.
f. Could erosion occur because of clearing, construction, or use? If so, generally describe.
The purpose of grading will be to prepare building and access pads. Volumes
will involve approximaely 5,000 cy of fill and 500 cy of cut. There is also an
expectation that 2,000 cy of existing fill will need to be removed and replaced with
structural material.
g. About what percent of the site will be covered with impervious surfaces after project
construction (for example, asphalt or buildings)?
89%
h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any.
Best Management Practices for erosion control will be implemented to stabilize
exposed soils, identify clearing areas, and prevent soil from moving off-site.
2. Air
Find help answering air questions4
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.
Automobiles and typical construction machines will be used during construction.
Automobiles will be present during building operation
b. Are there any off-site sources of emissions or odor that may affect your proposal? If
so, generally describe.
None Known
c. Proposed measures to reduce or control emissions or other impacts to air, if any:
All engines will be properly maintained so full efficiencies are experienced and
emissions minimized.
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3. Water
Find help answering water questions5
a. Surface:
Find help answering surface water questions6
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.
An upstream storm system flows through the site. This system continues
west through adjacent development and discharges to Maplewood Creek
approximately 850 feet from the site.
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.
The project will require relocation of the 24” pipe that conveys the upstream
flow across the site. The piped system will be replaced with another pipe to
convey runoff around the proposed building.
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 a general
description, purpose, and approximate quantities if known.
NO
5. Does the proposal lie within a 100-year floodplain? If so, note location on the site
plan.
No.
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:
Find help answering ground water questions7
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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 a general description, purpose, and approximate quantities if known.
No.
2. Describe waste material that will be discharged into the ground from septic tanks
or other sources, if any (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 anticipated
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.
Source of site runoff is direct precipitation. Runoff will be collected, 20% of
the site will be directed to a pair of raingardens, the remaining pollution
generating runoff will flow through a pre-manufactured treatment system
providing for enhanced treatment, and then all of the runoff will be detained in
an underground vault below the lower parking level. Conceptual volumes are
included in the preliminary Technical Information Report.
2. Could waste materials enter ground or surface waters? If so, generally describe.
The proposed treatment measure will prevent the discharge of pollutants.
3. Does the proposal alter or otherwise affect drainage patterns in the vicinity of the
site? If so, describe.
The proposal will reroute an existing culvert that carries upstream flow
through the site. However, the flow will discharge from the site in the same
location it currently does.
d. Proposed measures to reduce or control surface, ground, and runoff water, and
drainage pattern impacts, if any:
Storm drainage will follow the requirements of the 2017 City of Renton Surface
Water Design Manual.
4. Plants
Find help answering plants questions
a. Check the types of vegetation found on the site:
☒ deciduous tree: alder, maple, aspen, other
☐ evergreen tree: fir, cedar, pine, other
☒ shrubs
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☒ 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?
All vegetation will be removed and new will be installed.
c. List threatened and endangered species known to be on or near the site.
None Known.
d. Proposed landscaping, use of native plants, or other measures to preserve or enhance
vegetation on the site, if any.
Native plants will be utilized. A full landscape plan has been prepared which shows the
extent of of the landscape proposal.
e. List all noxious weeds and invasive species known to be on or near the site.
The site has numberous blackberry plants.
5. Animals
Find help answering animal questions8
a. List any birds and other animals that 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:
None Known
b. List any threatened and endangered species known to be on or near the site.
None Known.
c. Is the site part of a migration route? If so, explain.
No
d. Proposed measures to preserve or enhance wildlife, if any.
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None proposed.
e. List any invasive animal species known to be on or near the site.
None known.
6. Energy and natural resources
Find help answering energy and natural resource questions9
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.
Electricity for power, heat and cooling. Possibly natural gas for heat.
b. Would your project affect the potential use of solar energy by adjacent properties? If
so, generally describe.
Not anticipated. The building may create shade on adjacent site to east certain times of
day / year.
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.
Full compliance with WA Energy Code.
7. Environmental health
Health Find help with answering environmental health questions 10
a. Are there any environmental health hazards, including exposure to toxic chemicals,
risk of fire and explosion, spill, or hazardous waste, that could occur because of this
proposal? If so, describe.
None Anticipated
1. Describe any known or possible contamination at the site from present or past
uses.
None Known
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 Known
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.
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None Anticipated. A nominal amount of fuel will be on site to operate construction
equipment.
4. Describe special emergency services that might be required.
No special services should be necessary.
5. Proposed measures to reduce or control environmental health hazards, if any.
Building Management will have operational measures to limit and
control hazards.
b. Noise
1. What types of noise exist in the area which may affect your project (for example:
traffic, equipment, operation, other)?
None
2. 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 the site)?
Construction equipment will be utilized during construction in conformance
with Renton noise standards.
3. Proposed measures to reduce or control noise impacts, if any:
The project will comply with all City of Renton ordinances and standards.
8. Land and shoreline use
Find help answering land and shoreline use questions11
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 unoccupied. One residence was previously occupied. The
surrounding properties are either commercial or residential per zoning. The
proposal is for the site to remain residential and have some commercial. The
use will not impact neighbors.
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 because 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?
No
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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?
The project will not be affected nor have and affect.
c. Describe any structures on the site.
Existing residence at south end of property.
d. Will any structures be demolished? If so, what?
No
e. What is the current zoning classification of the site?
CA
f. What is the current comprehensive plan designation of the site?
CMU
g. If applicable, what is the current shoreline master program designation of the site?
None
h. Has any part of the site been classified as a critical area by the city or county? If so,
specify.
No
i. Approximately how many people would reside or work in the completed project?
Commercial – Work – 10+ people
Residencial – Reside – 28-64 people
j. Approximately how many people would the completed project displace?
Zero
k. Proposed measures to avoid or reduce displacement impacts, if any.
None, no displacement
l. Proposed measures to ensure the proposal is compatible with existing and projected
land uses and plans, if any.
The project is designed to be consistent with City requirements pertaining to land
use.
m. Proposed measures to reduce or control impacts to agricultural and forest lands of
long-term commercial significance, if any:
None. There are no agricultural or forest lands in the vicinity.
9. Housing
Find help answering housing questions12
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a. Approximately how many units would be provided, if any? Indicate whether high,
middle, or low-income housing.
28 - Middle
b. Approximately how many units, if any, would be eliminated? Indicate whether high,
middle, or low-income housing.
1 - Middle
c. Proposed measures to reduce or control housing impacts, if any:
None, project improves housing.
10. Aesthetics
Find help answering aesthetics questions13
a. What is the tallest height of any proposed structure(s), not including antennas; what is
the principal exterior building material(s) proposed?
The highest point will be 55’-10.5”. The exterior will have cementitious siding and panels,
exposed CMU and Concrete
b. What views in the immediate vicinity would be altered or obstructed?
None anticipated.
c. Proposed measures to reduce or control aesthetic impacts, if any:
The exterior design, finishes and color selection will be that of a high quality
project.
11. Light and glare
Find help answering light and glare questions14
a. What type of light or glare will the proposal produce? What time of day would it
mainly occur?
Walkway lighting will light the ground at night.
b. Could light or glare from the finished project be a safety hazard or interfere with
views?
No. All light will be directed toward the ground or building and be shielded to avoid
spillage.
c. What existing off-site sources of light or glare may affect your proposal?
None Known
d. Proposed measures to reduce or control light and glare impacts, if any:
Exterior lighting will be directed downward and be shielded to minimize offsite
impacts.
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12. Recreation
Find help answering recreation questions
a. What designated and informal recreational opportunities are in the immediate
vicinity?
Heather Downs Park
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 proposed.
13. Historic and cultural preservation
Find help answering historic and cultural preservation questions15
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.
NO
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
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 Proposed.
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.
No measures proposed.
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14. Transportation
Find help with answering transportation questions16
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.
The site is served by NE 4th Street and Bremerton Ave NE.
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?
There is a bus stop on NE 4th Street on the same block as the subject property.
c. How many additional parking spaces would the completed project or non-
project proposal have? How many would the project or proposal
eliminate?
The project will have 49 parking spaces. The existing residence has two spaces
which will be eliminated.
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).
NE 4th Street and Bremerton Ave will receive new improvements where adjacent
to property, including paving, curbs and gutters, sidewalks and landscaping
e. Will the project or proposal use (or occur in the immediate vicinity of) water, rail, or
air transportation? If so, generally describe.
No
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?
368 Average Daily Trips. See TIA Report by Kimley Horn Traffic
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:
No measures have been taken. We do not expect any transportation related
impacts from our project.
15. Public services
Find help answering public service questions17
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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.
None Anticipated.
b. Proposed measures to reduce or control direct impacts on public services, if any.
The building will have fire sprinklers which will be an aid to the fire department.
16. Utilities
Find help answering utilities questions18
a. Circle utilities currently available at the site: electricity, natural gas, water, refuse
service, telephone, sanitary sewer, septic system, other:
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.
The building will have fire sprinklers which will be an aid to the fire department.
Signature
Find help about who should sign19
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.
X
Type name of signee: Martin J. Reimers
Position and agency/organization: Concept Architecture, Principal
Date submitted: 4/17/2025
Supplemental sheet for nonproject actions
Find help for the nonproject actions worksheet20
Do not use this section for project actions.
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19 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/SEPA-checklist-
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20 https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-
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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;
production, 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:
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?
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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.