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ENGINEERING DEPARTMENT
904 6t" Street Anacortes, WA 98221
www.anacorteswa.gov
Official Use Only: (Information to Inspectors)
Required Storm Water Facility and other related requirements:
Project Address: 1918 Bay PI Submittal Date: 2/2/23
Parcel Number: P59622 Revision Number:
Permit Number: BLD-2023-0058 Reviewer: Rob F
Acceptance Date (COA): 2/7/23
FRONT OF REPORT:
Submittal Checklist: (All items listed below are required for a complete submittal)
o Cover Sheet (Preparer to Provide): Project title, Location, Revision dates, Engineer's Stamp
o TAB 1: Minimum Requirement#1 — Preparation of Stormwater Site Plans
o TAB 2: Minimum Requirement#2 —Construction Stormwater Pollution Prevention (SWPP)
o APPENDIX 1 - Survey performed by a Professional Land Surveyor
o APPENDIX 3 - Model Soil Management Plan for BMP T5.13
o APPENDIX 4 - Determining Construction Site Sediment Damage Potential (Appendix 7)
o APPENDIX 5 - Site Plan with all applicable information (Minimum Size 11 x17 — 30 scale)
o APPENDIX 6 - Documented Site Photos (North, South, East and West)
Stormwater Management Requirements:
o Refer to the 2019 Department of Ecology Manual
o See also, City of Anacortes Municipal Code 19.76 for additional information
o See also, current Engineering Development Standards, Chapter 2- Storm Drainage for additional
information.
Version Date: August 30, 2022
Project Description and Summary:
Summary Table
Existing Proposed
Development Type Residential Landscape
Number of Lots 1
Lot Acreage in SF 18295.20
Soil Type(s) Artificial Fill
Site Sediment Transport Score Hi h\Low Low -45
Depth to Ground Water Table (Feet and Inches)
See completed Soils Analysis Volume 1, Chapter 3.1.1 Flow control Exempt
Infiltration Rate during Rainy Season Inch\Per Hour
Impervious Surface on-site 7,036sf 6 342sf
Impervious Surface off-site 0 0
New and Replaced Hard Surface Total SF 3 157
Lot Coverage (Percentage) 15.4% 16.9%
BMP (Required Minimum Requirement 5) BMP T5.13 Post Construction Soils
Water Quality Method Minimum Requirement 6 Below threshold
Water Quantity Method Minimum Requirement 7 Below threshold
Existing Site Conditions Summary:
(Additionally, provide information on previous permits, if any, like Grade and Fill, Clear and Grade, topography,
vegetation, drainage, Critical Areas adjacent to the site and how it may affect this project if soils are disturbed,
Soils Type (Included in Soils Analysis Report), Erosion Problem Areas, Construction Phasing)Sequence)
On the lot there is an existing single family home and attached garage with a total impervious area of 3,356 sf.
The existing driveway covers 1,078sf and the sidewalk/patio area covers 2,602sf. The road frontage has an
existing curb but no sidewalk. The closest catch basin is 260 feet to the north on Bay Place.
No soils report was completed for this site.
Developed Conditions Summary:
(Additionally, to be shown on the site plan. Identify cut and fill areas, proposed slopes of all hard
surfaces , proposed contours)
The proposal is to replace 3,157sf of concrete with new landscaping, new driveway, and pathways
and construct a new patio cover that will cover 320sf of area.
Drainage Basin (2007 Storm Comp Plan — City website\publicworks\engineering\comprehensive plans):
What Drainage Basin are you in? n/a Identify any downstream drainage issues (Storm Comp Plan:
Yes If so, describe:
The site is adjacent to and directly discharges into Flounder Bay.
Complete the Applicability Requirements — Flow Chart (See next page(s)
- Highlight the path and attach
Version Date: August 30, 2022
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Version Date: August 30, 2022
TAB 2 (MINIMUM REQUIREMENT#2)
1-3.4.2 Minimum Requirement#2 — Construction Stormwater Pollution Prevention Plan (SWPP)
All new development and redevelopment projects are responsible for preventing erosion and
discharge of sediment and other pollutants into receiving waters.
Projects which result in 2,000 square feet or more of new plus replaced hard surface area, or which
disturb 7,000 square feet or more of land must prepare a Construction Stormwater Pollution
Prevention Plan (SWPPP) as part of the Stormwater Site Plan (see MR1: Preparation of Stormwater
Site Plans).
Projects below those thresholds (listed above) are not required to prepare a Construction SWPPP,
but must consider all of the Construction SWPPP Elements (listed below) and develop controls for all
Construction SWPPP Elements that pertain to the project site.
General Requirements:
The Construction SWPPP shall include a narrative and drawings. All BMPs shall be clearly
referenced in the narrative and marked on the drawings. The Construction SWPPP narrative shall
include documentation to explain and justify the pollution prevention decisions made for the project.
Each of the 13 Construction SWPPP Elements (listed below) must be considered and included in the
Construction SWPPP unless site conditions render the Element unnecessary and the exemption from
that Element is clearly justified in the narrative of the SWPPP.
Clearing and grading activities for developments shall be permitted only if conducted pursuant to an
approved site development plan (e.g., subdivision approval) that establishes permitted areas of
clearing, grading, cutting, and filling. These permitted clearing and grading areas and any other areas
required to preserve critical or sensitive areas, buffers, native growth protection easements, or tree
retention areas, shall be delineated on the site plans and the development site.
The Construction SWPPP shall be implemented beginning with initial land disturbance and until final
stabilization. Sediment and Erosion control BMPs shall be consistent with the BMPs contained in II-3
Construction Stormwater BMPs.
Seasonal Work Limitations: From October 1 through April 30, clearing, grading, and other soil
disturbing activities shall only be permitted if shown to the satisfaction of the local permitting authority
that silt-laden runoff will be prevented 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; and
2. Limitations on activities and the extent of disturbed areas; and
3. Proposed erosion and sediment control measures.
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, and
3. Activities where there is one hundred percent infiltration of surface water runoff within the site
in approved and installed erosion and sediment control facilities.
Version Date: August 30, 2022
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Version Date: August 30, 2022
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 2019 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: Sandra Russell
Site Address: 1918 Bay Place
Prepared By: ANC Design - Aaron Parrish
The Stormwater checklist or building permit determined that:
❑ The 13 elements must be addressed ❑ These elements must be addressed
for construction activity adding under for construction activity adding 2,000
2,000 sq. ft. of hard surface area. 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, provide the BMP's that will be applicable to your project. Use the attached Tables
provided.
ELEMENT 1: Preserve Vegetation/Mark Clearing Limits
❑ 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.
Suggested BMPs for Element 1:
BMP C101: Preserving Natural Vegetation
BMP C102: Buffer Zones
BMP C103: High-Visibility Fence
• BMP C233: Silt Fence
How did you comply with this section?
A high visibility construction fence BMP C103 will be installed at the perimeter of the construction site
except if an existing fence already exists or were silt fence is used. BMP will be installed as first step
ot construction.
BMP to be monitored daily and repaired as needed.
Version Date: August 30, 2022
ELEMENT 2: Establish Construction Access
❑ Limit construction vehicle access and exit to one route, if possible.
❑ Stabilize access points with a pad of quarry spalls, crushed rock, or other equivalent BMPs, to minimize
tracking onto roads.
❑ Locate wheel wash or tire baths on site, if the stabilized construction entrance is not effective in
preventing tracking sediment onto roads.
❑ 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.
❑ Conduct street washing only after sediment is removed in accordance with the above bullet.
❑ Control street wash wastewater by pumping back on site or otherwise preventing it from discharging
into systems tributary to waters of the State.
Additional Guidance for Element 2
Minimize construction site access points along linear projects, such as roadways. Street washing may
require local jurisdiction approval.
Suggested BMPs for Element 2:
• BMP C105: Stabilized Construction Access
• BMP C106: Wheel Wash
• BMP C107: Construction Road / Parking Area Stabilization
How did you comply with this section?
Construction access will be limited to the existing driveway off of Bay PI.
ELEMENT 3: Control Flow Rates
❑ 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 volumetric flow rate of stormwater
runoff from the project site.
❑ 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).
❑ If permanent infiltration ponds are used for flow control during construction, protect these facilities from
siltation during the construction phase.
Version Date: August 30, 2022
Additional Guidance for Element 3
• Conduct a downstream analysis if changes in flows could impair or alter conveyance systems,
streambanks, bed sediment, or aquatic habitat. See III-3.2 Preparing a Stormwater Site Plan for off-site
analysis guidelines.
• Even gently sloped areas need flow controls such as BMP C235: Wattles or other energy dissipation /
filtration structures. Place dissipation facilities closer together on steeper slopes. These methods
prevent water from building higher velocities as it flows downstream within the construction site.
• Control structures designed for permanent detention BMPs are not appropriate for use during
construction without modification. If used during construction, modify the control structure to allow for
long-term storage of runoff and enable sediment to settle. Verify that the BMP is sized appropriately for
this purpose. Restore BMPs to their original design dimensions, remove sediment, and install a final
control structure at completion of the project.
• Erosion has the potential to occur because of increases in the volume, velocity, and peak flow rate of
stormwater runoff from the project site. The local permitting agency may require infiltration or detention
BMP designs that provide additional or different stormwater flow control than the designs detailed in
this manual. These requirements may be necessary to address local conditions or to protect properties
and waterways downstream.
• Velocity of water leaving the site should not exceed 3 feet/second, if the discharge is to a stream or
ditch. Install velocity dissipation, such as BMP C207: Check Dams or BMP C202: Riprap Channel
Lining to ensure reduction of the flow velocity to a non-erosive level.
• If the discharge from a project site is to a municipal storm drainage system, the allowable discharge
rate may be limited by the capacity of the public system. It may be necessary to clean the municipal
storm drainage system prior to the start of the discharge to prevent scouring solids from the drainage
system. Obtain permission from the owner of the collection system before discharging to it. Ensure that
no downstream pipes are surcharged as a result of increased flows from the project site.
If the discharge from a project site is directly to a flow control exempt receiving water listed in Appendix
I-A: Flow Control Exempt Receiving Waters or to an infiltration system, there is no discharge flow limit.
Suggested BMPs for Element 3
BMP C203: Water Bars
BMP C207: Check Dams
• BMP C209: Outlet Protection
• BMP C235: Wattles
BMP C240: Sediment Trap
BMP C241: Sediment Pond (Temporary)
• See also V-12 Detention BMPs
How did you comply with this section?
A silt fence BMP C233 is to be installed along the water front south boundary and up each side of the lot.
Version Date: August 30, 2022
ELEMENT 4: Install Sediment Controls
❑ Design, install, and maintain effective erosion controls and sediment controls to minimize the discharge
of pollutants.
❑ 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.
❑ 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.
❑ 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.
❑ 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.
Additional Guidance for Element 4
• Outlet structures that withdraw impounded stormwater from the surface to avoid discharging sediment
that is still suspended lower in the water column are for the construction period only. If installing a
floating pump structure, include a stopper to prevent the pump basket from hitting the bottom of the
pond.
• If a sediment trapping BMP utilizes a control structure that will also be used in a permanent detention
BMP application, the control structure construction must be finalized for the permanent BMP application
upon project completion.
• Install sediment controls in a manner that protects the sensitive areas and their buffers marked in
accordance with Element 1: Preserve Vegetation / Mark Clearing Limits.
• Where feasible, direct stormwater to vegetated areas to increase sediment removal and maximize
stormwater infiltration.
• Seed and mulch earthen structures such as dams, dikes, and diversions according to the timing
indicated in Element 5: Stabilize Soils.
• Full stabilization includes concrete or asphalt paving; quarry spalls used as ditch lining; or the use of
rolled erosion products, a bonded fiber matrix product, or vegetative cover in a manner that will fully
prevent soil erosion.
• The Local Permitting Authority may inspect and approve areas fully stabilized by means other than
pavement or quarry spalls.
Version Date: August 30, 2022
Suggested BMPs for Element 4:
BMP C231: Brush Barrier
• BMP C232: Gravel Filter Berm
• BMP C233: Silt Fence
• BMP C234: Vegetated Stri p
• BMP C235: Wattles
• BMP C240: Sediment Trap
• BMP C241: Sediment Pond (Temporary
• BMP C250: Construction Stormwater Chemical Treatment
• BMP C251: Construction Stormwater Filtration
How did you comply with this section?
Per BMP C233 a silt fence will be installed as noted in element 3. To be installed prior to the start of
construction. BMP to be monitored daily and repaired as needed.
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.
❑ Control stormwater volume and velocity within the site to minimize soil erosion.
❑ 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
❑ Stabilize soils at the end of the shift before a holiday or weekend if needed based on the weather
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.
❑ Minimize the disturbance of steep slopes.
❑ Minimize soil compaction and, unless infeasible, preserve topsoil.
Version Date: August 30, 2022
Additional Guidance for Element 5
• Soil stabilization BMPs should be appropriate for the time of year, site conditions, estimated duration of
use, and potential water quality impacts that stabilization agents may have on downstream waters or
ground water.
• Ensure that gravel base used for stabilization is clean and does not contain fines or sediment.
Suggested BMPs for Element 5:
• BMP C120: Temporary and Permanent Seeding
• BMP C121: Mulching
• BMP C122: Nets and Blankets
• BMP C123: Plastic Covering
• BMP C124: Sodding
• BMP C125: Topsoiling /Composting
• BMP C126: Polyacrylamide (PAM)for Soil Erosion Protection
• BMP C130: Surface Roughening
• BMP C131: Gradient Terraces
• BMP C140: Dust Control
How did you comply with this section?
Install plastic covering per BMP C123 on Soils Stockpiles. BMP to be monitored
daily and repaired as needed.
ELEMENT 6: Protect Slopes
❑ 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.
❑ At the top of slopes, collect drainage in pipe slope drains or protected channels to prevent erosion.
Temporary pipe slope drains must be sized to convey the flow rate calculated by the one fo the
following methods:
• Single Event Hydrograph Method: The peak volumetric flow rate calculated using a 10-minute
time step from a Type 1 A, 10-year, 24-hour frequency storm, or;
• Continuous Simulation Method: The 10-year peak flow rate, as determined by an approved
continuous runoff model with a 15-minute time step.
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.
Version Date: August 30, 2022
If using the Western Washington Hydrology Model (WWHM) to predict flows, bare soil areas should be
modeled as "landscaped" area.
❑ 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.
Additional Guidance for Element 6
• Consider soil type and its potential for erosion.
• Stabilize soils on slopes, as specified in Element 5: Stabilize Soils.
• BMP combinations are the most effective method of protecting slopes with disturbed soils. For
example, use both BMP C121: Mulching and BMP C122: Nets and Blankets in combination.
Suggested BMPs for Element 6:
• BMP C120: Temporary and Permanent Seeding
• BMP C121: Mulching
• BMP C122: Nets and Blankets
• BMP C123: Plastic Covering
• BMP C124: Sodding
• BMP C130: Surface Roughening
• BMP C131: Gradient Terraces
• BMP C200: Interceptor Dike and Swale
• BMP C201: Grass-Lined Channels
BMP C203: Water Bars
BMP C204: Pipe Slope Drains
BMP C205: Subsurface Drains
BMP C206: Level Spreader
• BMP C207: Check Dams
BMP C208: Triangular Silt Dike (TSD)
How did you comply with this section?
The site is flat with a 1% to 2% slope and slope protection will not be an issue.
Version Date: August 30, 2022
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 sediment.
❑ 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).
Additional Guidance for Element 7
• 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.
• Keep all approach roads clean. Do not allow sediment and street wash water to enter storm drains
without prior and adequate treatment (as defined above) unless treatment is provided before the storm
drain discharges to waters of the State.
• Inlets should be inspected weekly at a minimum and daily during storm events.
Suggested BMPs for Element 7
• BMP C220: Inlet Protection
How did you comply with this section?
Storm Drain Inlet protection devices will be installed at existing catch basins in the immediate vicinity of
the project. To be installed prior to the start of any construction.
Nearest CB is must north of the site approximately 260 feet on Bay Place.
BMP to he monitored daily and repaired as needed_
ELEMENT 8: Stabilize Channels and Outlets
❑ Design, construct, and stabilize all on-site conveyance channels to prevent erosion from the flow rate
calcultated by one the following methods:
o Single Event Hydrograph Method: The peak volumetric flow rate calculated using a 10-minute
time step from a Type 1 A, 10-year, 24-hour frequency storm, or;
o Continuous Simulation Method: The 10-year peak flow rate, as determined by an approved
continuous runoff model with a 15-minute time step.
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.
❑ Provide stabilization, including armoring material, adequate to prevent erosion of outlets, adjacent
streambanks, slopes, and downstream reaches at the outlets of all conveyance systems.
Additional Guidance for Element 8
The best method for stabilizing channels is to completely line the channel with BMP C122: Nets and
Blankets first, then add BMP C207: Check Dams as necessary to function as an anchor and to slow the
flow of water.
Version Date: August 30, 2022
Suggested BMPs for Element 8
BMP C122: Nets and Blankets
• BMP C202: Riprap Channel Lining
• BMP C207: Check Dams
• BMP C209: Outlet Protection
How did you comply with this section?
No stormwater runoff will be conveyed off site via channels, swales, or streams.
ELEMENT 9: Control Pollutants
Design, install, implement and maintain effective pollution prevention measures to minimize the discharge of
pollutants. The project proponent must:
❑ 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.
❑ Discharge wheel wash or tire bath wastewater to a separate on-site treatment system that prevents
discharge to surface water, or to the sanitary sewer, with local sewer district approval.
❑ 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.
❑ Use BMPs to prevent contamination of stormwater runoff by pH-modifying sources. The sources for this
contamination include, but are not limited to: recycled concrete stockpiles, 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 water quality standards.
❑ Assure that washout of concrete trucks is performed off site or in designated concrete washout areas
only. Do not wash out concrete truck drums or concrete handling equipment onto the ground, or into
storm drains, open ditches, streets, or streams. Washout of small concrete handling equipment may be
Version Date: August 30, 2022
disposed of in a formed area awaiting concrete where it will not contaminate surface or ground water.
Do not dump excess concrete on site, except in designated concrete washout areas. Concrete spillage
or concrete discharge directly to ground water or surface waters of the State is prohibited. Do not wash
out to formed areas awaiting infiltration BMPs.
❑ Obtain written approval from Ecology before using chemical treatment other than CO2, dry ice, or food
grade vinegar to adjust pH.
❑ Uncontaminated water from water-only based shaft drilling for construction of building, road, and bridge
foundations may be infiltrated provided the wastewater is managed in a way that prohibits discharge to
surface waters. Prior to infiltration, water from water-only based shaft drilling that comes into contact
with curing concrete must be neutralized until pH is in the range of 6.5 to 8.5 (su).
Additional Guidance for Element 9
• Wheel wash and/or tire bath wastewater can be combined with wastewater from concrete washout
areas if the wastewaters will be properly disposed of at an offsite location or treatment facility.
• Do not use upland land applications for discharging wastewater from concrete washout areas.
• Woody debris may be chopped and spread on site.
• Conduct oil changes, hydraulic system drain down, solvent and degreasing 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.
Suggested BMPs for Element 9
• BMP C151: Concrete Handlinq
BMP C152: Sawcutting and Surfacing Pollution Prevention
BMP C153: Material Delivery, Storage, and Containment
BMP C154: Concrete Washout Area
BMP C250: Construction Stormwater Chemical Treatment
• BMP C251: Construction Stormwater Filtration
• BMP C252: Treating and Disposing of pH Water
Also see the Source Control BMPs detailed in Volume IV
How did you comply with this section?
Per BMP C154 a Concrete Washout Area is to be installed onsite to capture contaminated water from
concrete washouts. To be installed prior to concrete installation.
BMP to be monitored daily and repaired as needed.
Contractor is to provide spill prevention kits for excavation and concrete crews are required on Site.
Version Date: August 30, 2022
ELEMENT 10: Control De-Watering
❑ 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 BMP C240:
Sediment Trap or BMP C241: Sediment Pond (Temporary.
❑ Discharge foundation, vault, and trench dewatering water, which have similar characteristics to
stormwater runoff at the site, into a controlled conveyance system before discharge to Discharge clean,
non-turbid dewatering water, such as well-point ground water, to systems tributary to, or directly into
surface waters of the State, as specified in Element 8: Stabilize Channels and Outlets, provided the
dewatering flow does not cause erosion or flooding of receiving waters. Do not route clean dewatering
water through stormwater sediment BMPs. 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.Handle highly turbid or
contaminated dewatering water separately from stormwater.
❑ Handle highly turbid or otherwise contaminated dewatering separately from stormwater.
❑ Other dewatering 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.
Additional Guidance for Element 10
• Channels must be stabilized, as specified in Element 8: Stabilize Channels and Outlets.
• Construction equipment operation, clamshell digging, concrete tremie pour, or work inside a cofferdam
can create highly turbid or contaminated dewatering water.
Discharging sediment-laden (muddy) water into waters of the State likely constitutes violation of water
quality standards for turbidity. The easiest way to avoid discharging muddy water is through infiltration
and preserving vegetation.
• Dewatering water from contaminated sites must be handled separately from stormwater. Direct
contaminated stormwater to a sanitary sewer where allowed by the local sewer authority, or to other
approved treatment.
Suggested BMPs for Element 10
• BMP C203: Water Bars
• BMP C236: Vegetative Filtration
How did you comply with this section?
If dewatering is needed all discharge will be directed to a temporary sediment trap BMP C240 prior to
discharge to the city storm drainage system.
Version Date: August 30, 2022
ELEMENT 11: Maintain BMPs
❑ 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.
Additional Guidance for Element 11
• Some temporary erosion and sediment control BMPs are biodegradable and designed to remain in
place following construction. BMP C122: Nets and Blankets is an example of a BMP with biodegradable
options.
• 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.
Suggested BMPs for Element 11
• BMP C150: Materials on Hand
• BMP C160: Certified Erosion and Sediment Control Lead
How did you comply with this section?
BMPs to be monitored daily and repaired as needed and/or as required by the City of Anacortes.
ELEMENT 12: Manage the Project
❑ Phase development projects to the maximum degree practicable and take into account seasonal work
limitations.
❑ Inspect, maintain and repair all BMPs as needed to assure continued performance of their intended
function. Projects regulated under the Construction Stormwater General Permit (CSWGP) must
conduct site inspections and monitoring in accordance with Special Condition S4 of the CSWGP.
❑ Maintain, update, and implement the Construction SWPPP.
❑ Projects that disturb one or more acres must have site inspections conducted by a Certified Erosion
and Sediment Control Lead (CESCL). Project sites disturbing less than one acre may have a CESCL or
a person without CESCL certification conduct inspections. By the initiation of construction, the
Construction SWPPP must identify the CESCL or inspector, who must be present on site or on-call at
all times.
Version Date: August 30, 2022
Additional Guidance for Element 12
The project manager must ensure that the project is built in such a way to comply with all Construction SWPPP
Elements, as detailed in this section. Considerations for the project manager include, but are not limited to:
• construction phasing
• seasonal work limitations
• coordination with utilities and other contractors
• inspection
• monitoring
• maintaining an updated construction SWPPP
Phasing of Construction
Phase development projects where feasible in order to prevent soil erosion and transporting of sediment
from the site during construction. Revegetate exposed areas and maintain that vegetation as an integral part
of the clearing activities for any phase.
Clearing and grading activities for developments shall be permitted only if conducted using an approved site
development plan (e.g., subdivision approval) that establishes permitted areas of clearing, grading, cutting,
and filling. Minimize removing trees and disturbing or compacting native soils when establishing permitted
clearing and grading areas. Show on the site plans and the development site permitted clearing and grading
areas and any other areas required to preserve critical or sensitive areas, buffers, native growth protection
easements, or tree retention areas as may be required by local jurisdictions.
Inspection
All BMPs must be inspected, maintained, and repaired as needed to assure continued performance of their
intended function. Site inspections must be conducted by a person knowledgeable in the principles and
practices of erosion and sediment control. The person must have the skills to 1) assess the site conditions
and construction activities that could impact the quality of stormwater, and 2) assess the effectiveness of
erosion and sediment control measures used to control the quality of stormwater discharges.
For construction sites one acre or larger that discharge stormwater to surface waters of the state, a CESCL
must be identified in the construction SWPPP; this person must be on-site or on-call at all times.
Certification must be obtained through an approved training program that meets the erosion and sediment
control training standards established by Ecology. See BMP C160: Certified Erosion and Sediment Control
Lead.
Appropriate BMPs or design changes shall be implemented as soon as possible whenever inspection and/or
monitoring reveals that the BMPs identified in the Construction SWPPP are inadequate, due to the actual
discharge of/or potential to discharge a significant amount of any pollutant.
The CESCL or inspector must examine stormwater visually for the presence of suspended sediment,
turbidity, discoloration, and oil sheen. They must evaluate the effectiveness of BMPs and determine if it is
necessary to install, maintain, or repair BMPs to improve the quality of stormwater discharges.
Based on the results of the inspection, construction site operators must correct the problems identified by:
• Reviewing the Construction SWPPP for compliance with the 13 elements and making appropriate
revisions within 7 days of the inspection.
• Immediately beginning the process of fully implementing and maintaining appropriate source control
and/or treatment BMPs as soon as possible, addressing the problems no later than within 10 days of
the inspection. If installation of necessary treatment BMPs is not feasible within 10 days, the
construction site operator may request an extension within the initial 10-day response period.
• Documenting BMP implementation and maintenance in the site log book (applies only to sites that have
coverage under the Construction Stormwater General Permit).
Version Date: August 30, 2022
The CESCL or inspector must inspect all areas disturbed by construction activities, all BMPs, and all
stormwater discharge points at least once every calendar week and within 24 hours of any discharge from
the site. (For purposes of this condition, individual discharge events that last more than one day do not
require daily inspections. For example, if a stormwater pond discharges continuously over the course of a
week, only one inspection is required that week.) The CESCL or inspector may reduce the inspection
frequency for temporary stabilized, inactive sites to once every calendar month
Maintaining an Updated Construction SWPPP
Retain the Construction SWPPP on-site or within reasonable access to the site.
Modify the Construction SWPPP whenever there is a change in the design, construction, operation, or
maintenance at the construction site that has, or could have, a significant effect on the discharge of
pollutants to waters of the state.
The Construction SWPPP must be modified if, during inspections or investigations conducted by the
owner/operator, or the applicable local or state regulatory authority, it is determined that the Construction
SWPPP is ineffective in eliminating or significantly minimizing pollutants in stormwater discharges from the
site. Modify the Construction SWPPP as necessary to include additional or modified BMPs designed to
correct problems identified. Complete revisions to the Construction SWPPP within seven (7) days following
the inspection.
Suggested BMPs for Element 12
• BMP C150: Materials on Hand
• BMP C160: Certified Erosion and Sediment Control Lead
• BMP C162: Scheduling
How did you comply with this section?
BMP to be monitored daily and repaired as needed and the responsibility of the owner. Project does
not require a certified CESCL.
ELEMENT 13: Protect Low Impact Development BMPS
The primary purpose of On-Site Stormwater Management is to reduce the disruption of the natural site
hydrology through infiltration. BMPs used to meet 1-3.4.5 MR5: On-Site Stormwater Management (often called
LID BMPs) are permanent facilities.
❑ Protect all LID BMPs (including, but not limited to BMP T7.30: Bioretention, BMP T5.14: Rain Gardens,
and BMP T5.15: Permeable Pavements) from sedimentation through installation and maintenance of
erosion and sediment control BMPs on portions of the site that drain into the LID BMPs. Restore the
BMPs to their fully functioning condition if they accumulate sediment during construction. Restoring the
BMP must include removal of sediment and any sediment-laden Bioretention/Rain Garden soils, and
replacing the removed soils with soils meeting the design specification.
❑ Maintain the infiltration capabilities of LID BMPs by protecting against compaction by construction
equipment and foot traffic. Protect completed lawn and landscaped areas from compaction due to
construction equipment.
❑ Control erosion and avoid introducing sediment from surrounding land uses onto BMP T5.15:
Permeable Pavements. Do not allow muddy construction equipment on the base material or pavement.
Do not allow sediment-laden runoff onto permeable pavements or base materials.
Version Date: August 30, 2022
❑ Permeable pavement fouled with sediments or no longer passing an initial infiltration test must be
cleaned using procedures in accordance with this manual or the manufacturer's procedures.
❑ Keep all heavy equipment off existing soils under LID BMPs that have been excavated to final grade to
retain the infiltration rate of the soils.
Additional Guidance for Element 13
See Chapter 5: Precision Site Preparation, Construction & Inspection of LID Facilities in the LID Technical
Guidance Manual for Puget Sound(Hinman and Wulkan, 2012) for more detail on protecting LID integrated
management practices.
Note that the LID Technical Guidance Manual for Puget Sound(Hinman and Wulkan, 2012) is for additional
informational purposes only. You must follow the guidance within this manual if there are any discrepancies
between this manual and the LID Technical Guidance Manual for Puget Sound(Hinman and Wulkan, 2012).
Suggested BMPs for Element 13
• BMP C102: Buffer Zones
• BMP C103: High-Visibility Fence
• BMP C200: Interceptor Dike and Swale
• BMP C201: Grass-Lined Channels
• BMP C207: Check Dams
• BMP C208: Triangular Silt Dike (TSD)
• BMP C231: Brush Barrier
• BMP C233: Silt Fence
• BMP C234: Vegetated Stri p
How did you comply with this section?
No LID BMPS are proposed.
Aaron Parrish
Applicant Signature Date
Version Date: August 30, 2022
TAB 5 (MINIMUM REQUIREMENT#5)
1-3.4.5 Minimum Requirement#5 —On-site Stormwater Management
Projects shall employ Stormwater Management BMPs in accordance with the following thresholds,
standards, and lists to infiltrate, disperse, and retain stormwater runoff on site to the extent feasible
without causing flooding or erosion impacts.
Project thresholds that trigger Minimum Requirements #1 through #5, shall utilize the On-site
Stormwater Management BMP's from List#1 for all surfaces within each type of surface in List#1; or,
Demonstrate compliance with the LID Performance Standard. Projects selecting this option cannot use
Rain Gardens. They may choose to use Bioretention BMP's as described in Chapter V-7 — Infiltration
and Bioretention Treatment Facilities to achieve the LID Performance Standard.
Refer to this section of the reference Manual for all Feasibility or Infeasibility Criteria for List#1
and List#2.
Is this project Flow Control Exempt? yes (Yes\No) (See Appendix I-E: Flow Control-Exempt
Surface Water). If yes, provide reasoning from the applicability section of 1-2.5.7 Minimum
Requirement#7: Flow Control). If No, then the project triggers Minimum Requirement#7 (1-2.5.7) and
possibly Minimum Requirement#8 (1-2.5.8).
The flow has a direct discharge to Flounder Bay a Flow Control Exempt body of water.
If the project is Flow Control Exempt, select from the List 3 below: (Skip List 1 and List 2)
o BMP T5.13 Post Construction Soils Quality and Depth
o BMP T5.10A: Downspout Full Infiltration, or;
o BMP T5.10B Downspout Dispersion Systems, or;
o BMP T5.10C: Performated Stub-out Connections, or;
LID Performance Standard
The LID Performance Standard compliance method for Minimum Requirement#5 requires modeling the
proposed Flow Control BMPs to demonstrate the flow reduction as described below. Note that in order
to meet the LID Performance Standard, the chosen Flow Control BMPs will most likely need to include
infiltration.
Stormwater discharges shall match developed discharge durations to pre-developed durations for the
range of pre-developed discharge rates from 8% of the 2-year peak flow to 50% of the 2-year peak flow.
Refer to the Flow Control Performance Standard section in 1-3.4.7 MR7: Flow Control for information
about the assignment of the pre-developed condition. Project sites that must also meet 1-3.4.7 MR7:
Flow Control must match flow durations between 8% of the 2-year flow through the full 50-year flow.
Designers selecting this option cannot use BMP T5.14: Rain Gardens to achieve the LID Performance
Standard. They may choose to use BMP T7.30: Bioretention to achieve the LID Performance Standard.
Version Date: August 30, 2022
The List Approach
The List Approach compliance method for Minimum Requirement#5 requires evaluating the BMPs in
Table 1-3.2: The List Approach for MR5 Compliance.
For each surface, evaluate the feasibility of the BMPs in the order listed, and use the first BMP that is
considered feasible. The designer must document the site conditions and infeasibility criteria used to
deem BMPs infeasible. Once a BMP is deemed feasible and used for a surface, no other BMP from the
list is necessary for that surface.
If all BMPs in the list are infeasible, then the designer must document the site conditions and infeasibility
criteria used to deem each BMP infeasible. This documentation will demonstrate compliance with
Minimum Requirement#5.
Feasibility shall be determined by evaluation against:
• Design criteria, limitations, and infeasibility criteria identified for each BMP in this manual; and
• Competing Needs Criteria as listed below.
All sites are required to utilize BMP T5.13 — Post Construction Soil Quality and Depth.
For each surface, consider the BMP's in the order listed for that type of surface. Use the first BMP that
is considered feasible. No other on-site Stormwater Management BMP is necessary for that surface.
Feasiblity shall be determined by evaluation against:
1. Design criteria, limitations and infeasiblity criteria identified for each BMP in this manual, and;
2. Competing needs criteria listed in Chapter V-5 — On-site Stormwater Management.
Lawn and Landscaped Area:
• BMP T5.13: Post-Construction Soil Quality and Depth. (Attach Detail in Report)
Refer to this site for requirements and specifications. All projects are required to utilize this BMP.
http://www.soilsforsalmon.orq/pdf/Soil BMP Manual.pdf
See Appendix 3 for the "Model Soil Management Plan for BMP T5.13" to be submitted with
Drainage Report and Application Material.
An alternate document acceptable to the City of Anacortes is a Test Report provided by the Soils
Supplier that identifies the soils to be used meet the specifications outlined under Minimum
Requirement 5. The specifications are in both WSDOT and CSI Formats. For specifications, refer to
the above referenced PDF.
This submittal can be a deferred submittal since most projects are not sure who the supplier will be
at the time of building permit application. For projects that trigger Minimum Requirements 1 through
5, the Test Report will be provided to the Building Department. Projects triggering Minimum
Requirements 1 through 9, the Test Report will be provided to the Engineering Department.
Version Date: August 30, 2022
APPENDIX 1 -Survey performed by a Professional Land Surveyor
The object of this appendix is to ensure that the property has a minimum of 3 out of 5 property corners
visible to ensure that the structures are placed within the required setbacks.
SKYLINE NO, 7
SECTIONS 2,7 81 28 o TWP. 35 N.,, R, I E., W.M.
CITY OF ANACORTES
SKAGIT COUNTY,,,, WASHINGTON
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Version Date: August 30, 2022
APPENDIX 3 — Model Soll Management Plan for BMP T5.13
An alternate document acceptable to the City of Anacortes is a Test Report provided by the Soils Supplier that
identifies the soils to be used meet the specifications outlined under Minimum Requirement 5. The
specifications are in both WSDOT and CSI Formats. For specifications, refer to the above referenced PDF.
This submittal can be a deferred submittal since most projects are not sure who the supplier will be at the time
of building permit application. For projects that trigger Minimum Requirements 1 through 5, the Test Report will
be provided to the Building Department. Projects triggering Minimum Requirements 1 through 9, the Test
Report will be provided to the Engineering Department.
Version Date: August 30, 2022
DEFERRED SUBMITTAL: PROVIDE A TEST REPORT FROM SOILS SUPPLIER TO THE BUILDING DEPT.
PROJECT INFORMATION "Model Soil Management Plan for BMP T5.13" age# of pages
Complete all information on page 1; only site address and permit number on additional pages.
Site Address/Lot No.:
Permit Type: Permit Number:
Permit Holder: Phone:
Mailing Address:
Contact Person: Phone:
Plan Prepared By:
ATTACHMENTS REQUIRED (Check off required items that are attached to this plan)
Site Plan showing,to scale: Areas of undisturbed native vegetation(no amendment required)
New planting beds and turf areas(amendment required)
Type of soil improvement proposed for each area
Soil test results(required if proposing custom amendment rates
Product test results for proposed amendments
AREA# (should match Area#on Site Plan)
PLANTING TYPE Turf Undisturbed native vegetation
Planting Beds Other:
SQUARE FOOTAGE OF THIS AREA: square feet
SCARIFICATION inches(depth)of scarification needed to achieve finished total 12"loosened depth.
Subsoil will be scarified
PRE-APPROVED inches of compost or imported topsoil applied
AMENDMENT METHOD: X 3.1 (conversion factor, inches to cubic yards) PRODUCT:
Topsoil import =cu.yards per 1,000 sq. ft.
Amend with compost X ,000s sq.ft. in this area
Stockpile and amend =cubic yards of amendment QUANTITY: CU.YDS.
cu.yds. stockpiled) needed to cover this area to designated depth)
CUSTOM AMENDMENT Attach test results and calculations.
Topsoil import inches organic matter or topsoil import PRODUCT:
Topsoil&compost lift X 3.1
Amend =cu.yards/ 1,000 sq. ft.
Stockpile and amend X ,000s sq.ft. in this area
( cu.yds. stockpiled) =cubic yards of amendment QUANTITY: CU.YDS.
MULCH ,000 sq.ft. PRODUCT:
X 6.2 (conversion, to give 2 inch mulch depth)
=cubic yards of mulch QUANTITY: CU.YDS.
TOTAL AMENDMENT/TOPSOIL/MULCH FOR ALL AREAS (complete on page 1 only, totaling all areas/ a es in this Plan
❑ Product#1: ❑ Quantity: cu.yds.
❑ Test Results: % organic matter C:N ratio<25:1 (except mulch,or<35:1 for native plants) "stable" es/no
❑ Product#2: ❑ Quantity: cu.yds.
❑ Test Results: % organic matter C:N ratio<25:1 exce t mulch,or<35:1 for native plants) "stable" es/no
❑ Product#3: ❑ Quantity: cu.yds.
❑ Test Results: % organic matter C:N ratio<25:1 (except mulch,or<35:1 for nativeplants) "stable" es/no
Date: Inspector: Approved: Revisions Required:
Date: Inspector: Approved: Revisions Required:
Version Date: August 30, 2022
APPENDIX 4— DetermInIng Construct'lon S'Ite Sediment Damage Potent'lal (AppendIx 7 — NPDES Phase
11 Perm'1t)
Note: See attached. All projects within the City of Anacortes are required to complete that document under
Appendix 4.
Version Date: August 30, 2022
Western Washington Phase II Stormwater Permit
L APPENDIX 7 - Determining Construction Site
Sediment Damage Potential
The following rating system allows objective evaluation of a particular development site's potential to
discharge sediment. Permittees may use the rating system below or develop alternative process
designed to identify site-specific features which indicate that the site must be inspected prior to clearing
and construction. Any alternative evaluation process must be documented and provide for equivalent
environmental review.
Step one is to determine if there is a sediment/erosion sensitive feature downstream of the development
site. If there is such a site downstream complete step two, assessment of hydraulic nearness. If there is
a sediment/erosion sensitive feature and it is hydraulically near the site then go to step three to
determine the construction site sediment transport potential.
H. STEP 1 —Sediment/Erosion Sensitive Feature Identification
Sediment/erosion sensitive features are areas subject to significant degradation due to the effect of
sediment deposition or erosion. Special protection must be provided to protect them.
Sediment/erosion sensitive features include but are not limited to:
L Salmonid bearing fresh water streams and their tributaries or freshwater streams that
would be Salmonid bearing if not for anthropogenic barriers;
11. Lakes;
111. Category I, II, and III wetlands;
iv. Marine near-shore habitat;
V. Sites containing contaminated soils where erosion could cause dispersal of
contaminants; and
vi. Steep slopes (25% or greater) associated with one of the above features.
Identify any sediment/erosion sensitive features, and proceed to step two. If there are none the assessment
is complete.
111. STEP 2 — Hydraulic Nearness Assessment
Sites are hydraulically near a feature if the pollutant load and peak quantity of runoff from the site will not
be naturally attenuated before entering the feature. The conditions that render a site hydraulically near
to a feature include, but are not limited to, the following:
i. The feature or a buffer to protect the feature is within 200 feet downstream of the site.
ii. Runoff from the site is tight-lined to the feature or flows to the feature through a channel
or ditch.
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Version Date: August 30, 2022
A site is not hydraulically near a feature if one of the following takes place to provide attenuation
before runoff from the site enters the feature:
iv. Sheet flow through a vegetated area with dense ground cover
V. Flow through a wetland not included as a sensitive feature
vi. Flow through a significant shallow or adverse slope, not in a conveyance
channel, between the site and the sensitive feature.
Identify any of the sediment/erosion sensitive features from step one that are hydraulically near
the site, and proceed to step three. If none of the sediment/erosion sensitive features are
hydraulically near the site, the assessment is complete.
vii. STEP 3— Construction Site Sediment Transaort Potential
Using the worksheet below, determine the total points for each development site. Assign points
based on the most critical condition that affects 10% or more of the site.
If soil testing has been performed on site, the results should be used to determine the
predominant soil type on the site. Otherwise, soil information should be obtained from the
county soil survey to determine Hydrologic Soil Group (Table of Engineering Index Properties
for step 1.D) and Erosion Potential (Table of Water Features for step 1.E)
When using the county soil survey, the dominant soil type may be in question, particularly when
the site falls on a boundary between two soil types or when one of two soil types may be present
on a site. In this case, the soil type resulting in the most points on the rating system will be
assumed unless site soil tests indicate that another soil type dominates the site.
Use the point score from Step 3 to determine whether the development site has a high potential
for sediment transport off of the site.
Total Score Transport Rating
<100 Low
11100 High
A high transport rating indicates a higher risk that the site will generate sediment contaminated
runoff.
Construction Site Sediment Transport Potentia|Worksheet
A. Points
2% orless -0
>2-5% ----------........-------------_..5
>5-10% ------------.''''.------------. 15
>10-15% ------------........----------30
>15% -----------.......------------_..50
B. Site Area to be cleared and/or graded:
<5,000 sq. ft ...................................................................................0
5.000 sq. ft. - 1 acre...................................................................
>1 acres .....................................................................................
C. Quantity of cut and/or fill on site:
<500 cubic yards................................................................................0
500 -5.00O cubic yards ----------------------. 5
>5.000 - 10.000 cubic yards.........................................................10
>10.000 -20.000 cubic yards..................................................... -2 5
>20.000 cubic yards -----------------------40
D. Hydrologic
soilgroup A................................................................................ _0
Hydrologic soil group 8.................................................................10
Hydrologic soil group C..............................................................._2 0
Hydrologic soil group [)..............................................................._4O
E. GW, GP, SW,
SPsoils...................................................................................... _O
Dual classifications M. GP-GM, GW-GC,
GP-GC, SW-SK SW-SC. SP-SM. |SP-SC)---------10
GM. GC, SM, SC soils..................................................................20
Mi- CL, MH. CH soils------------------_--..4O
1
F. Surface or Groundwater entering site identified and intercepted :
Yes.................................................................................................0
No ................................................................................................25
G. Depth of cut or height of fill >1 0 feet:
Yes...............................................................................................25
No...........................................................................................................0
IL Yes 50
No...........................................................................................................0
TOTAL POUNTS------------------------------- 10
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See full size plan
site,APPENDIX 6 Documented Site Photos (Show all directions of the
frontage)
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