HomeMy WebLinkAboutDOC-2021-Permit Application -81y o PLANNING, COMMUNITY, & ECONOMIC DEVELOPMENT DEPARTMENT
��' Mailing Address: P.O. Box 547, Anacortes, WA 98221
Office Location: 904 6th Street, Anacortes WA 98821
i�'4CO Phone: (360) 293-1901
Residential Building Permit Application
Submittal Packet
New Single Family Residences (SFR) Duplexes Additions and Remodels (SFR & Duplex)
Accessory Dwelling Units Manufactured Homes Residential decks and retaining walls
FORM BP-1: RESIDENTIAL BuILDING PERMIT APPLICATION
1. PROPERTY INFORMATION
Project Address (Street, Suite #):
Assessor Parcel Number:
Q fa-
S
Subdivision/Lot #:
Zoning Designation:
Lot area size):
{)- 7i A
sq. ft.
2. TYPE OF PROJECT
% New SFR ❑ New Accessory Dwelling Unit: ❑ Deck/porch (new/repair)
❑ New Duplex ❑ Attached to Primary Unit
p ❑ Interior remodel
n Detached from Primary Unit
❑ New Addition to SFR ❑ Garage, carport or accessory building ❑ Retaining wall
or duplex (new/repair)
❑ Other:
Project Summary:
Project Valuation: $ o5 00
3. PROPERTY OWNER INFORMATION
Name • "'C C04
Phone: �O. `r
7O • Z3 � j '1
Address (Street, City, State, Zip): Email Addr s: 1
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4. CONTRACTOR INFORMATION
ame:" Phone: �tr' Po o �, (D O -701 Z/ Z
Contractor'ssiness Licenses State License #: City License #:
*All Contractors & Subcontractors must have a valid City V
of Anacortes business license prior to doing work in the Expiration Date: Expiration Date:
City.
Address (Street, City, State, Zip): Email Address:
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Res. Building Permit Application Submittal Checklist Page 1 of 19
Updated April 20, 2021
PLANNING, COMMUNITY, & ECONOMIC DEVELOPMENT DEPARTMENT
Mailing Address: P.O. Box 547, Anacortes, WA 98221
Office Location: 904 6th Street, Anacortes WA 98821
Phone: (360) 293-1901
Co-
S. CONTACT PERSON
Select one person the city will conta
related to this project:
Name:
Address (Street, City,-ftate, Zip):
-3D 113 toucn..&.rc.`*,k
ct for anything
Applicant X Property Owner ❑ Contractor
Phone: O �3A5 L
EmailA dress:
tk%�
6. LENDER INFORMATION
RCW 19.27.095 requires the City to obtain information with regard to lenders. If there are no lenders involved with your project,
write "no lenders" on the Name Line below.
Name:
Address (Street, City,
I l o GyS tom. af_ L
Phone:
Email Address:
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1 7. ACKNOWLEDGEMENTS & SIGNATURE
• S/>D0
Read and initial each of the following statements prior to signing this application:
I understand that when a building permit application is taken in over the counter it does not mean
the application has been deemed technically complete and sufficient for staff review.
I understand that if I submit incomplete, inaccurate, and/or erroneous information it will take the
City longer to process my permits.
I understand and acknowledge that I could be responsible for providing as -built drawings (on paper
or electronically) as part of the project's certificate of occupancy process.
I understand and acknowledge that Special Inspections could be required as part of my project, and
�iJ ( if needed I will be required to pay for the cost of these inspections.
I understand and acknowledge that financial securities could be required as part of the work I am
1K completing and I agree to provide the items needed for the City to calculate these securities and to
provide the securities themselves.
I understand that if permits are reviewed concurrently such as design review, site plan, traffic
concurrency, etc., any required revisions to one permit may affect the entire plan set and could
add costs and time to the project.
Res. Building Permit Application Submittal Checklist
Updated April 20, 2021
Page 2 of 19
t � v PLANNING, COMMUNITY, & ECONOMIC DEVELOPMENT DEPARTMENT
I'` Mailing Address: P.O. Box 547, Anocortes, WA 98221
7'r" �' Office Location: 904 6th Street, Anocortes WA 98821
`�'� Phone: (360) 293-1901
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I hereby declare that I am either the owner of the property listed on this application or the owner of
this property has authorized me to be their representative to act for them. I also declare under
penalty of perjury under the laws of the State of Washington that all of the statements and answers
contained herein, and the information submitted with this application form is in all respects, true,
correct, and complete to the best of knowledge and belief.
Wn A re
Printed Name
Res. Building Permit Application Submittal Checklist
Updated April 20, 2021
Date
Page 3 of 19
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PLANNING, COMMUNITY, & ECONOMIC DEVELOPMENT DEPARTMENT
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Mailing Address: P.O. Box 547, Anacortes, WA 98221
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Office Location: 904 6tn Street, Anacortes WA 98821
Phone: (360) 293-1901
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Residential Building Permit Application Form
(FORM BP-1—attached)
X
X
X
X
X
Structure & Site Information Form
(FORM BP-2—attached)
X
X
X
X
X
Mechanical & Plumbing Fixtures Form
(FORM BP-3—attached)
X
X
X
Architectural Plans
(requirements listed on FORM BP-4 -attached)
X
X
X
X
X
Stormwater Management Minimum Requirements
Determination
X
X
X
X
(FORM BP-5, attached)
Stormwater Site Plan
X
X
X
X
Site Plan & Landscape Plans
(requirements listed on Form BP-6)
X
X
X
X
X
Structural Plans & Calculations
X
X
X
X
X
Energy Code Plans & Forms
X
X
Manufacturer's Specifications/Cut Sheets
X
Copy of recorded survey
X
X
X
X
Technical Reports
X
X
X
X
'
Other Required Permits
X
X
X
X
ADU Affidavit of Owner Occupancy (signed)
X
L�X
Submittal Information
Fees
Send applications in PDF format with a file and message
Once we receive your application, we will
size no greater than 30 MB. Please review our Electronic
contact you about payment of the
Submittal Guidelines for more information. An email
required deposit, if any.
with a link to a file share site (Dropbox, Google Drive,
OneDrive, etc.) is acceptable.
Permit fees are paid prior to building
permit issuance.
Email:
Incomplete applications will not be processed.
Res. Building Permit Application Submittal Checklist
Updated April 20, 2021
Page 4 of 19
PLANNING, COMMUNITY, & ECONOMIC DEVELOPMENT DEPARTMENT
` " r Mailing Address: P.O. Box 547, Anacortes, WA 98221
_ Office Location: 904 6th Street, Anacortes WA 98821
ri:� i� Phone: (360) 293-1901
Additional details on certain submittal items is provided below to ensure Applicants are fully aware
what City staff will be looking for when an application is submitted to the City.
FORMS AND PLANS
• FORM BP-1: RESIDENTIAL BUILDING PERMIT APPLICATION FORM. Provides key information
about your project, including type of permit you are applying for, and property owner, contractor,
and contact information.
■ FORM BP-2: STRUCTURE AND SITE INFORMATION FORM. Provides key information about
the proposed structure, including height, floor areas, fire protection proposed, and asks questions
about site characteristics that are used to determine whether your project requires any other
information or additional permit applications to be submitted.
■ FORM BP-3: PLUMBING AND MECHANICAL INFORMATION. Form BP-3 provides space for
you to fill in fixture information for plumbing and mechanical appliances and equipment that are
included as part of your project.
• FORM BP-4: ARCHITECTURAL PLAN REQUIREMENTS. Form BP-4 contains a list of all the items
required to be shown on Architectural Plans.
• FORM BP-5: STORMWATER MANAGEMENT DETERMINATION FORM. Most development
within the City of Anacortes that involves disruption of soils, or construction of buildings, streets,
parking lots, etc. requires a Stormwater review. Stormwater review requirements are based on
either the amount of soil to be disturbed (grading, vegetation removal), or the amount of hard
surface that is created or replaced on a site (building footprint, concrete, asphalt or gravel parking,
sidewalk, etc.). Form BP-5 assists you in determining the level of stormwater review (applicable
Minimum Requirements) required for your project.
• STORMWATER SITE PLAN. The Stormwater Site Plan is the comprehensive report containing all
of the technical information and analysis necessary for regulatory agencies to evaluate your
project for compliance with stormwater requirements. The level of stormwater review and
contents of the Stormwater Site Plan will vary with the type and size of the project, and individual
site characteristics. Use Form BP-5 to determine the level of stormwater review and then
complete the applicable Stormwater Minimum Requirements Form on the Public Works -
Engineering Department Forms website and provide required submittal items/plans.
• FORM BP-6: SITE PLANS & LANDSCAPE PLANS. Form BP-6 contains a list of all the items
required to be shown on Site and Landscape Plans.
STRUCTURAL PLANS: Plans prepared and stamped by a State of Washington licensed
professional structural engineer drawn at a scale approved by the Building Official clearly indicating
the information required by the "Permits" section of the currently adopted International Building
Code and Chapter 19.27 RCW (State Building Code Act, Statewide amendments), and City submittal
forms including: structural members labeled as to size and spacing as well as bracing, blocking,
bridging, special connectors, and anchor bolts; cross-section details, as needed, to show typical
foundation, floor, wall, ceiling and roof construction; insulation of walls, floors and roof/ceiling; and
details of stairs, fireplaces and special construction, if any.
Res. Building Permit Application Submittal Checklist
Updated April 20, 2021
Page 5 of 19
r� PLANNING, COMMUNITY, & ECONOMIC DEVELOPMENT DEPARTMENT
Mailing Address: P.O. Box 547, Anacortes, WA 98221
Office Location: 904 6tn Street, Anacortes WA 98821
i
wPhone: (360) 293-1901
r
• STRUCTURAL CALCULATIONS: An analysis of loads, materials, etc., prepared and stamped by a
State of Washington licensed professional structural engineer.
• ENERGY CODE FORMS: The standard Washington State Energy Office form requesting the
information required under Chapter 51-11 WAC detailing building components used to comply with
the State Residential or Nonresidential Energy Code, as applicable.
• MANUFACTURER'S SPECIFICATIONS/CUT SHEETS: A document that summarized the
performance and other technical characteristics of a product, machine, component, material, or
subsystem (e.g., a power supply) in sufficient detail that allows the City to determine the product
will be incompliance with applicable codes.
• COPY OF RECORDED SURVEY. A survey of your property is needed so that conformance
with minimum setback requirements and other development standards can been
confirmed and verified on site by the inspectors. Property markers must be visible on your
property. If they are not at the time an inspection is requested, you may need to have a
new survey completed.
OTHER SUBMITTALS DETERMINED ON A CASE -BY -CASE BASIS
TECHNICAL REPORTS
Following is a list of technical reports that will be required to be submitted to the City when certain
circumstances exist on or near a site an Applicant is planning on making improvements to. The general
triggers for each of the listed technical reports I provided below:
A. CRITICAL AREAS REPORTS: In general, Critical Area reports are required when wetlands
and/or streams are located on or near a site. Critical area mitigation plans may also be required,
depending on the project proposal. See Anacortes Municipal Code Ch. 17.70 for additional
information.
B. GEOTECHNICAL REPORT: In general, Geotechnical Reports are required when work is
proposed on or near slopes in excess of 15% and/or known landslide hazard areas. See
Anacortes Municipal Code Ch. 17.70 for additional information.
OTHER PERMITS DETERMINED ON A CASE -BY -CASE BASIS
OTHER FORMS
Following is a list of other permits that could be required in certain circumstances. The general triggers
for each of the listed permits is provided below.
A. FILL AND GRADE PERMIT: Grading (importing, exporting, and/or moving material on a site) of
more than 50 cubic yards and/or if grading modifies the existing flow of stormwater or
groundwater.
B. RIGHT-OF-WAY PERMIT: A right-of-way permit is required anytime the public right-of-way is
disturbed or obstructed in any way by private development or the general public.
Res. Building Permit Application Submittal Checklist
Updated April 20, 2021
Page 6 of 19
t� Q PLANNING, COMMUNITY, & ECONOMIC DEVELOPMENT DEPARTMENT
Mailing Address: P.O. Box 547, Anacortes, WA 98221
Office Location: 904 6th Street, Anacortes WA 98821
� w Phone: 360 293-1901
Page left blank intentionally.
Res. Building Permit Application Submittal Checklist
Updated April 20, 2021
Page 7 of 19
PLANNING, COMMUNITY, & ECONOMIC DEVELOPMENT DEPARTMENT
j
Mailing Address: P.O. Box 547, Anacortes, WA 98221
7 ell
��``
Office Location: 904 6th Street, Anacortes WA 98821
COR
Phone: (360) 293-1901
•. P-2: STRUCTURE AND SITE INFORMATION
OPERTY WHEREWORK IS OCCURRING
:
L
2. DETAILED PROPOSED STRUCTURE INFORMATION
Complete the following information as it relates to your project. Mark items that
are not applicable with
Structure height:
AREA SQUARE FOOTAGE OCCUPANCY GROUP CONSTRUCTION TYPE OCCUPANT LOAD
1st Floor: 14
2nd Floor:
3rd Floor:
Basement:
Garage:
Total deck:
Total porch:
2
Other:
Other:
Other:
3. QUESTIONS
ABOUT THE PROPOSED STRUCTURE
Is a fire sprinkler system being installed?
❑ YES 19 NO
Is a monitored fire alarm being installed?
❑ YES tI NO
❑ YES $1 NO
Are retaining wall(s) being built?
Are structural plans required?
❑ YES 19 NO
4. PROJECT SITE INFORMATION
A. Is work within the City's right-of-way proposed? If yes, you will be required
❑ YES 19 NO
to submit a right-of-way permit application.
If you have already submitted a ROW permit, list the permit number here:
B. Is the property located in a flood zone?
❑ YES NO
If yes, list the flood zone designation:
C. Are there slopes in excess of 15% on or abutting the site? If yes, a
❑ YES 14 NO
geotechnical report will likely need to be submitted.
Res. Building Permit Application Submittal Checklist
Updated April 20, 2021
Page 8 of 19
�'I Y 0� PLANNING, COMMUNITY, &ECONOMIC DEVELOPMENT DEPARTMENT
F Mailing Address: P.O. Box 547, Anacortes, WA 98221
.-- Office Location: 904 6th Street, Anacortes WA 98821
Phone: (360) 293-1901
D. Are there critical areas or buffers on or abutting (within 300-feet of) the YES ❑ NO
project site? If yes, a critical areas report will likely need to be submitted. `
3 `V
E. Is the lot less than 5,000 sq. ft. in area? ❑ YES '$:NO
If yes, your site and building will need to comply with the standards in AMC
19.43.010.C.
F. Is your project involving an accessory dwelling unit?
If yes, your site and building will need to comply with the standards in AMC
19.47.
G. Will more than 2-acres be cleared and/or more than 5,000 board feet
(about 1 log truck load) of timber be harvested? If so you may need to
obtain a forest practices permit from DNR.
H. Is this project subject to the SEPA process? If yes, you will be required to
submit a SEPA checklist.
If you have already completed the SEPA process, list the permit number
here:
5. REQUIRED SIGNATURE
❑ YES
1' NO
❑ YES
10 NO
❑ YES
1A NO I
I hereby declare that I am either the owner of the property listed on this application or the owner of
this property has authorized me to be their representative to act for them. I also declare under penalty
of perjury under the laws of the State of Washington that all of the statements and answers contained
herein, and the information submitted with this application form is in all respects, true, correct, and
complete to the best of knowledge and belief.
9igna�—
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Printed Name
Res. Building Permit Application Submittal Checklist
Updated April 20, 2021
Z 21
Date
Page 9 of 19
PLANNING, COMMUNITY, & ECONOMIC DEVELOPMENT DEPARTMENT
` Mailing Address: P.O. Box 547, Anacortes, WA 98221
Office Location: 904 61 Street, Anacortes WA 98821
Phone: (360) 293-1901
FORM .STORMWATER MANAGEMENT MINIMUM
REQUIREMENTs DETERMINATION
I. PROPERTY WHERE WORK IS OCCURRING
ADDRESS: I ptRp 04JL„0.5
PARCEL NUMBER(S)
2. GENERAL INFORMATION
Most development within the City of Anacortes that involves disruption of soils, or construction of buildings,
streets, parking lots, etc. requires a Stormwater review. Stormwater review requirements are based on either
the amount of soil to be disturbed (grading, vegetation removal), or the amount of hard surface that is created
I or replaced on a site (building footprint, concrete, asphalt or gravel parking, sidewalk, etc.)
This form is largely targeted for small projects and single family residences. For larger projects and more
information please refer to the Anacortes Municipal Code (Chapter 19.76 Stormwater Management) and the
latest Washington State Department of Ecology Stormwater Management Manual for Western Washington
(Ecology Manual).
3. HARD SURFACE AREA CALCULATION
Please calculate your project's hard surface amount; guidance is provided on the next page of this document. Use
your project's total hard surface calculation to follow the flow chart(s) in this packet and determine the level of
stormwater management required for you project.
When determining your permit level or if stormwater thresholds are met or exceeded the entire project must be
considered. A project is that portion of a property, properties, or right of way subject to land disturbing activities,
new hard surfaces and replaced hard surfaces. The hard surface on your property will determine the storm water
utility fees and the stormwater general facility charge. All new or replaced hard surfaces should be accounted for.
Below are excerpts from the Anacortes Municipal Code and Ecology Manual that may assist you in preparing this
information.
"Hard surface area" means an impervious surface, a permeable pavement, or a vegetated roof.
"Impervious surface" means a non -vegetated surface area which either prevents or retards the entry of water into
the soil mantle as under natural conditions prior to development. A non -vegetated surface area which causes
water to run off the surface in greater quantities or at an increased rate of flow from the flow present under
natural conditions prior to development.
"Replaced impervious surface" means, for structures, the removal and replacement of impervious surfaces down to
the foundation. For other impervious surfaces, the removal down to bare soil or base course and replacement.
Res. Building Permit Application Submittal Checklist
Updated April 20, 2021
Page 13 of 19
Ri
u
� _G PLANNING, COMMUNITY, & ECONOMIC DEVELOPMENT DEPARTMENT
` Mailing Address: P.O. Box 547, Anacortes, WA 98221
f Office Location: 904 6th Street, Anacortes WA 98821
i ' Phone: 360 293-1901
Land disturbance
Description Total
(SF)
Total Area of Land disturbing activity
Total area converted from vegetation to
lawn or landscaped areas
Hard surface area calculation
Existing Removed Proposed Proposed
Description (SF) (SF) Replaced New
(SF) (SF)
Non Pollution Generating Hard `
Surface Area � \
(Sidewalks, paths, patios, etc.) L
Pollution Generating Hard Surface
Area boo
(Driveways, parking areas, etc.)
Total Hard Surface
Site Size
Existing impervious surface
coverage % %
(sq. ft. hard surface / site size)
Use the information in the above table to navigate the flow chart(s) on the next page and
determine the applicable stormwater management minimum requirements for your
project. Then complete the applicable Stormwater Minimum Requirements Form on the
Public Works - Engineering Department Forms website and provide required submittal
items/plans.
Check applicable box
Minimum Requirements Determination
❑
Minimum Requirements #1-9.
❑
Minimum Requirements #1-5.
Building Per Application Submir
dated April2 1
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Minimum Requirement #2.
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13 Elements of SWPPP
(Construction Stormwater Pollution Prevention Plan)
Please check off boxes to show that each element has been read and understood. Provide details where
applicable and if certain aspects are unnecessary or exempt, clearly justify. Details of the 13 Elements and the
correlating BMPs are listed Above from the 2014 Stormwater Management Manual for Western Washington
(SWMMWW). A link is provided on the City of Anacortes website, under Planning, Community, & Economic
Development Department, as well as under Stormwater on the Engineering Division of Public Work's page.
Owner Name:
Site Address:
Prepared By:
The Stormwater checklist or building permit determined that:
IJ The 13 elements must be addressed
for construction activity adding under
2,000 sq. ft. of hard surface area.
I_ These elements must be addressed
for construction activity adding 2,000
sq. ft. or more of hard surface area.
This means that an attached narrative
and site plan are required with this
document.
Under each element rovide the BMP's that will be a livable to provided. our ro'ect. Use the attached Tables
ELEMENT 1: Preserve Vegetation/Mark Clearing Limits
i Before beginning land disturbing activities, including clearing and grading, clearly mark all clearing
limits, sensitive areas and their buffers, and trees that are to be preserved within the construction area.
�( Retain the duff layer, native top soil, and natural vegetation in an undisturbed state to the maximum
degree practical.
ELEMENT 2: Establish Construction Access
Limit construction vehicle access and exit to one route, if possible.
[-1 Stabilize access points with a pad of quarry spalls, crushed rock, or other equivalent BMPs, to minimize
tracking onto roads.
[ 1 Locate wheel wash or tire baths on site, if the stabilized construction entrance is not effective in
Preventing tracking sediment onto roads.
l I If sediment is tracked off site, clean the affected roadway thoroughly at the end of each day, or more
frequently as necessary (ex: wet weather). Remove sediment from roads by shoveling, sweeping, or
Pick up and transport the sediment to a controlled sediment disposal area.
I I Conduct street washing only after sediment is removed in accordance with the above bullet.
Ll Control street wash wastewater by pumping back on site or otherwise preventing it from discharging
into systems tributary to waters of the State.
Version Date: October 7, 2019 Previous Version Date: February 20, 2019
ELEMENT 3: Control Flow Rates
yr Protect properties and waterways downstream of development sites from erosion and the associated
discharge of turbid waters due to increases in the velocity and peak runoff from the project site. volumetric flow rate of stormwater
I I Where necessary to comply with the bullet above, construct stormwater retention or detention facilities
as one of the first steps in grading. Assure that detention facilities function properly before constructing
site improvement (e.g. impervious surfaces).
11 If permanent infiltration ponds are used for flow control during construction, protect these facilities from
siltation during the construction phase.
ELEMENT 4: Install Sediment Controls
Design, install, and maintain effective erosion controls and sediment controls to minimize the discharge
of pollutants.
I Construct sediment control BMPs (sediment ponds, traps, filters, etc.) as one of the first steps in
grading. These BMPs shall be functional before other land disturbing activities take place.
0 Minimize sediment discharges from the site. The design, installation and maintenance of erosion and
sediment controls must address factors such as the amount, frequency, intensity and duration of
precipitation, the nature of resulting stormwater runoff, and soil characteristics, including the range of
soil particle sizes expected to be present on the site.
I-1 Direct stormwater runoff from disturbed areas through a sediment pond or other appropriate sediment
removal BMP, before the runoff leaves a construction site or before discharge to an infiltration facility.
Runoff from fully stabilized areas may be discharged without a sediment removal BMP, but must meet
the flow control performance standard in Element #3, bullet #1.
[ Locate BMPs intended to trap sediment on -site in a manner to avoid interference with the movement of
juvenile salmonids attempting to enter off -channel areas or drainages.
Provide and maintain natural buffers around surface waters, direct stormwater to vegetated areas to
increase sediment removal, and maximize stormwater infiltration.
U Where feasible, design outlet structures that withdraw impounded stormwater from the surface to avoid
discharging sediment that is still suspended lower in the water column.
ELEMENT 5: Stabilize Soils
Stabilize exposed and unworked soils by application of effective BMPs that prevent erosion. Applicable
BMPs include, but are not limited to: temporary and permanent seeding, sodding, mulching, plastic
covering, erosion control fabrics and matting, soil application of polyacrylamide (PAM), the early
application of gravel base early on areas to be paved, and dust control.
u Control stormwater volume and velocity within the site to minimize soil erosion.
CI Control stormwater discharges, including both peak flow rates and total stormwater volume, to minimize
erosion at outlets and to minimize downstream channel and stream bank erosion.
Soils must not remain exposed and unworked for more than the time periods set forth below to prevent
erosion.
o During the dry season (May 1 — Sept 30): 7 days
o During the wet season (Oct 1— Apr 30): 2 days
ri Stabilize soils at the end of the shift before a holiday or weekend if needed based on the weather
Version Date: October 7, 2019 Previous Version Date: February 20, 2019
forecast.
Stabilize soil stockpiles from erosion, protect with sediment trapping measures, and where possible, be
located away from storm drain inlets, waterways, and drainage channels.
,! Minimize the amount of soil exposed during construction activity.
r 1 Minimize the disturbance of steep slopes.
X Minimize soil compaction and, unless infeasible, preserve topsoil.
ELEMENT 6: Protect Slopes
I Design and construct cut -and -fill slopes in a manner to minimize erosion. Applicable practices include,
but are not limited to, reducing continuous length of slope with terracing and diversions, reducing slope
steepness, and roughening slope surfaces (Ex: track walking).
Divert off -site stormwater (run-on) or ground water away from slopes and disturbed areas with
interceptor dikes, pipes, and/or swales. Off -site stormwater should be managed separately from
stormwater generated on the site.
I At the top of slopes, collect drainage in pipe slop drains or protected channels to prevent erosion.
o *Temporary pipe slope drains must handle the peak volumetric flow rate calculated using a 10-
minute time step from a Type 1A, 10-year, 24-hour frequency storm for the developed condition.
Alternatively, the 10-year, 1-hour flow rate predicted/indicated by an approved continuous runoff
model, increased by a factor of 1.6, may be used. The hydrologic analysis must use the existing
land cover condition for predicting flow rates from tributary areas outside the project limits. For
tributary areas on the project site, the analysis must use the temporary or permanent project
land cover condition, whichever will produce the highest flow rates. If using the Western
Washington Hydrology Model (WWHM) to predict flows, bare soil areas should be modeled as
"landscaped" area.
o Where 15-minute time steps are available in an approved continuous runoff model, they may be
used directly without a correction factor.
U Place excavated material on the uphill side of trenches, consistent with safety and space
considerations.
! Place check dams at regular intervals within constructed channels that are cut down a slope.
! 1 Consider soil types and its potential for erosion.
1-1 Stabilize soils on slopes, as specified in Element 5.
L.I BMP combinations are the most effective method of protecting slopes with disturbed soils. Ex: Use both
mulching and straw erosion control blankets.
Version Date: October 7, 2019 Previous Version Date: February 20, 2019
ELEMENT 7: Protect Drain Inlets
❑ Protect all storm drain inlets made operable during construction so that stormwater runoff does not
enter the conveyance system without first being filtered or treated to remove sedlment.
1_:1 Clean or remove and replace inlet protection devices when sediment has filled one-third of the available
storage (unless a different standard is specified by the product manufacturer).
I I Where possible, protect all existing storm drain inlets so that stormwater runoff does not enter the
conveyance system without first being filtered or treated to remove sediment.
F1 Keep all approach roads clean. Do not allow sediment and street wash water to enter storm drains
without prior and adequate treatment unless treatment is provided before the storm drain discharges to
waters of the State.
Ll Inlets should be inspected weekly at a minimum and daily during storm events.
ELEMENT 8: Stabilize Channels and Outlets
[ I Design, construct, and stabilize all on -site conveyance channels to prevent erosion from the following
expected peak flows:
o *Channels must handle same peak volumetric flow rate as temporary pipe slope drains listed in
Element 6, above.
[ I Provide stabilization, including armoring material, adequate to prevent erosion of outlets, adjacent
streambanks, slopes, and downstream reaches at the outlets of all conveyance systems.
u The best method for stabilizing channels is to completely line the channel with a blanket product first,
then add check dams as necessary to function as an anchor and to slow the flow of water.
ELEMENT 9: Control Pollutants
et'' Design, install, implement, and maintain effective pollution prevention measures to minimize the
discharge of pollutants.
eK' Handle and dispose of all pollutants, including waste materials and demolition debris that occur on -site
in a manner that does not cause contamination of stormwater.
Provide cover, containment, and protection from vandalism for all chemicals, liquid products, petroleum
products, and other materials that have the potential to pose a threat to human health or the
environment. On -site fueling tanks must Include secondary containment. Secondary containment
means placing tanks or containers within an impervious structure capable of containing 110% of the
volume contained in the largest tank within the containment structure. Double -walled tanks do not
require additional secondary containment.
Conduct maintenance, fueling, and repair of heavy equipment and vehicles using spill prevention and
control measures. Clean contaminated surfaces immediately following any spill incident.
f Discharge wheel wash or tire bath wastewater to a separate on -site treatment system that prevents
discharge to surface water, such as closed -loop recirculation or upland land application, or to the
sanitary sewer, with local sewer district approval. Wheel wash or tire bath wastewater should not
include wastewater from concrete washout areas.
Apply fertilizers and pesticides in a manner and at application rates that will not result in loss of
chemical to stormwater runoff. Follow manufacturers' label requirements for application rates and
procedures.
Version Date: October 7, 2019 Previous Version Date: February 20, 2019
f Use BMPs to prevent contamination of stormwater runoff by pH -modifying sources. The sources for this
contamination include, but are not limited to: bulk cement, cement kiln dust, fly ash, new concrete
washing and curing waters, waste streams generated from concrete grinding and sawing, exposed
aggregate processes, dewatering concrete vaults, concrete pumping, and mixer washout waters. Adjust
the pH of stormwater if necessary to prevent violations of the water quality standards.
f t Assure that washout of concrete trucks is performed off -site or in designated concrete washout areas
only. Do not wash out concrete trucks onto the ground, or into storm drains, open ditches, streets, or
streams. Do not dump excess concrete on site, except in designated concrete washout areas. Concrete
spillage or concrete discharge to surface waters of the State is prohibited. Do not use upland land
applications for discharging wastewater from concrete washout areas.
1-1 Obtain written approval from Ecology and provide to the City before using chemical treatment other
than CO2 or dry ice to adjust pH.
Woody debris may be chopped and spread on site.
Y Conduct oil changes, hydraulic system drain down, solvent and de -greasing cleaning operations, fuel
tank drain down and removal, and other activities which may result in discharge or spillage of pollutants
to the ground or into stormwater runoff using spill prevention measures, such as drip pans.
Clean contaminated surfaces immediately following any discharge or spill incident. Emergency repairs
may be performed on -site using temporary plastic placed beneath and, if raining, over the vehicle.
ELEMENT 10: Control De -Watering
i 1 Discharge foundation, vault, and trench dewatering water, which have characteristics similar to
stormwater runoff at the site, into a controlled conveyance system before discharge to a sediment trap
or sediment pond.
❑ Discharge clean, non -turbid de -watering water, such as well -point ground water, to systems tributary to,
or directly into surface waters of the State, as specified in Element 8, provided the de -watering flow
does not cause erosion or flooding of receiving waters or interfere with the operation of the system. Do
not route clean dewatering water through stormwater sediment ponds. Note that "surface waters of the
State" may exist on a construction site as well as off site; for example, a creek running through a site.
u Handle highly turbid or contaminated dewatering water separately from stormwater.
i I Other treatment or disposal options may include:
1. Infiltration
2. Transport off -site in a vehicle, such as a vacuum flush truck, for legal disposal in a manner that
does not pollute state waters.
3. Ecology -approved on -site chemical treatment or other suitable treatment technologies.
4. Sanitary or combined sewer discharge with local sewer district approval, if there is no other
option.
5. Use of a sedimentation bag with outfall to a ditch or swale for small volumes of localized
dewatering.
CI Construction equipment operation, clamshell digging, concrete tremie pour, or work inside a cofferdam
can create highly turbid or contaminated dewatering water.
I I Discharging sediment -laden (muddy) water into waters of the State likely constitutes a violation of water
quality standards for turbidity. The easiest way to avoid discharging muddy water is through infiltration
and preserving vegetation.
Version Date: October 7, 2019 Previous Version Date: February 20, 2019
ELEMENT 11: Maintain BMPs
1 Maintain and repair all temporary and permanent erosion and sediment control BMPs as needed to
assure continued performance of their intended function in accordance with BMP specifications.
Remove all temporary erosion and sediment control BMPs within 30 days after achieving final site
stabilization or after the temporary BMPs are no longer needed. Some temporary erosion and sediment
control BMPs are bio-degradable and designed to remain in place following construction such as
compost socks.
Provide protection to all BMPs installed for the permanent control of stormwater from sediment and
compaction. All BMPs that are to remain in place following completion of construction shall be
examined and placed in full operating conditions. If sediment enters the BMPs during construction, it
shall be removed and the facility shall be returned to the conditions specified in the construction
documents.
Remove or stabilize trapped sediment on site. Permanently stabilize disturbed soil resulting from
removal of BMPs or vegetation.
ELEMENT 12: Manage the Project — Projects subject to Minimum Requirements 1-9 must have a Certified
Erosion and Sediment Control Lead (CESCL) for site inspections. Projects subject to Minimum Requirements
1-5 do not require the inspector to be certified. By the initiation of construction, the SWPPP must identify the
CESCL or inspector, who shall be present on -site or on -call at all times.
X Phase development projects to the maximum degree practicable and take into account seasonal work
limits to prevent soil erosion and prevent transporting sediment from the site during construction.
Inspection and monitoring — Inspect, maintain, and repair all BMPs as needed to assure continued
performance of their intended function.
,Maintain, update, and implement the SWPPP.
,IBC Clearing and grading activities for developments shall be permitted only if conducted using an approved
site development plan (e.g., subdivision approval).
I I From Oct 1 through Apr 30, clearing, grading, and other soil disturbing activities is permitted only if
shown that the site operator will prevent silt -laden runoff from leaving the site through a combination of
the following:
1. Site conditions including existing vegetative coverage, slope, soil type, and proximity to
receiving waters.
2. Limit activities and the extent of disturbed areas.
3. Proposed erosion and sediment control measures.
Weather conditions can influence the seasonal limitation on site disturbance. The City of Anacortes has
the authority to take enforcement action per AMC 19.76 Stormwater.
L] The following activities are exempt from the seasonal clearing and grading limitations:
1. Routine maintenance and necessary repair of erosion and sediment control BMPs;
2. Routine maintenance of public facilities or existing utility structures that do not expose the soil or
result in the removal of the vegetative cover to soil
3. Activities where there is 100% infiltration of surface water runoff within the site in approved and
installed erosion and sediment control facilities.
Version Date: October 7, 2019 Previous Version Date: February 20, 2019
ELEMENT 13. Protect Low Impact Development BMPS
f' If implementing any bioretention facilities or rain gardens, refer to the applicable BMP sections of the
Manual for requirements.
App icant Signature
— 4�U/v
Date
Version Date: October 7, 2019 Previous Version Date: February 20, 2019