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Civil Engineers ● Structural Engineers ● Landscape Architects ● Community Planners ● Land Surveyors
ESC Plan for
Construction Stormwater
Pollution Prevention
PREPARED FOR:
Ronhovde Architects LLC
14900 Interurban Ave S, Suite 138
Tukwila, WA 98168
PROJECT:
Compton Lumber Renton
2940, 2960, 2980, and 2990
East Valley Road
Renton, WA 98057
2190112.10
PREPARED BY:
Daniel Hendrickson, EIT
Project Engineer
REVIEWED BY:
Todd C. Sawin, PE, DBIA, LEEP AP
Principal
DATE:
March 2019
ESC Plan for
Construction Stormwater
Pollution Prevention
PREPARED FOR:
Ronhovde Architects LLC
14900 Interurban Ave S, Suite 138
Tukwila, WA 98168
PROJECT:
Compton Lumber Renton
2940, 2960, 2980, and 2990
East Valley Road
Renton, WA 98057
2190112.10
PREPARED BY:
Daniel Hendrickson, EIT
Project Engineer
REVIEWED BY:
Todd C. Sawin, PE, DBIA, LEEP AP
Principal
DATE:
March 2019
I hereby state that this ESC Plan for
Construction Stormwater Pollution
Prevention for the Compton Lumber
Renton project has been prepared by me
or under my supervision, and meets the
standard of care and expertise that is
usual and customary in this community
for professional engineers. I understand
that City of Renton does not and will not
assume liability for the sufficiency,
suitability, or performance of drainage
facilities prepared by me.
ESC Plan for Construction Stormwater Pollution Prevention
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2190112.10
Table of Contents
Section Page
1.0 Purpose ........................................................................................................................................... 1
2.0 Conditions of Use .......................................................................................................................... 2
3.0 Existing Site Conditions ................................................................................................................ 2
3.1 Existing Cover ..................................................................................................................... 2
3.2 Topography and Design ...................................................................................................... 2
3.3 Adjacent Areas .................................................................................................................... 2
4.0 ESC Plan Analysis and Design (Part A) ....................................................................................... 3
4.1 ESC Measures .................................................................................................................... 3
4.1.1 Clearing Limits ....................................................................................................... 3
4.1.2 Cover Measures ..................................................................................................... 3
4.1.3 Perimeter Protection .............................................................................................. 4
4.1.4 Traffic Area Stabilization ........................................................................................ 4
4.1.5 Sediment Retention ............................................................................................... 4
4.1.6 Surface Water Collection ....................................................................................... 4
4.1.7 Dewatering Control ................................................................................................ 4
4.1.8 Dust Control ........................................................................................................... 5
4.1.9 Flow Control ........................................................................................................... 5
4.1.10 Control Pollutants ................................................................................................... 5
4.1.11 Protect Existing and Proposed Flow Control BMPs ............................................... 5
4.1.12 Maintain BMPs ....................................................................................................... 5
4.1.13 Manage the Project ................................................................................................ 5
4.2 Erosion Problem Areas ....................................................................................................... 5
5.0 Stormwater Pollution Prevention and Spill (SWPPS) Plan Design (Part B) ............................. 6
5.1 Pollution and Spill Prevention Source Controls and BMPs................................................. 6
5.2 Responsible Personnel and Contact Information ............................................................... 8
5.3 Pollution and Spill Prevention Worksheets ......................................................................... 8
5.4 Disposal Methods ................................................................................................................ 8
6.0 ESC Performance and Compliance Provisions .......................................................................... 8
6.1 ESC Supervisor ................................................................................................................... 8
6.2 Monitoring of Discharges .................................................................................................... 9
ESC Plan for Construction Stormwater Pollution Prevention
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6.3 ESC Performance ............................................................................................................... 9
6.4 Flexible Compliance ............................................................................................................ 9
6.5 Roads and Utilities Compliance .......................................................................................... 9
6.6 Alternative and Experimental Measures ............................................................................. 9
7.0 ESC Implementation Requirements ............................................................................................. 9
7.1 Wet Season Requirements ................................................................................................. 9
7.2 Critical Areas Restriction ................................................................................................... 10
7.3 Maintenance Requirement ................................................................................................ 10
7.4 Construction Sequence ..................................................................................................... 11
7.5 Final Stabilization .............................................................................................................. 11
7.6 NPDES Requirements ...................................................................................................... 12
7.7 Forest Practice Permit Requirements ............................................................................... 12
8.0 Construction Schedule ................................................................................................................ 12
ESC Plan for Construction Stormwater Pollution Prevention
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Appendices
Appendix A
Exhibits
A-1 ............. Vicinity Map
A-2 ............. Existing Conditions Map
A-3 ............. NRCS Soil Survey Map
C1.01 ......... TESC Plan
C1.02 ......... TESC Notes and Details
Appendix B
Select King County Source Control BMPs
Appendix C
Inspection and Maintenance Report Forms
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1.0 Purpose
In 1972, Congress passed the Federal Water Pollution Control Act (FWPCA), also known as the
Clean Water Act (CWA), to restore and maintain the quality of the nation's waterways. The
ultimate goal was to ensure that rivers and streams were fishable, swimmable, and drinkable. In
1987, the Water Quality Act (WQA) added provisions to the CWA that allowed the Environmental
Protection Agency (EPA) to govern stormwater discharges from construction sites. In 1998, the
EPA published the final notice for General Permits for Storm Water Discharges from Constructio n
Activities Disturbing 5 Acres or Greater (63 Federal Register 7898, February 14, 1998). The
general permit includes provisions for development of a Stormwater Pollution Prevention Plan
(SWPPP) to maximize the potential benefits of pollution prevention, and sediment and erosion
control measures at construction sites.
Development, implementation, and maintenance of the Construction SWPPP will provide the
selected General Contractor with the framework for reducing soil erosion and minimizing
pollutants in stormwater during construction. The Construction SWPPP will:
Define the characteristics of the site and the type of construction that will occur.
Describe the practices that will be implemented to control erosion, and the release of
pollutants in stormwater.
Create an implementation schedule to ensure that the practices described in this
Construction SWPPP are in fact implemented; and to evaluate the plan's effectiveness in
reducing erosion, sediment, and pollutant levels in stormwater discharged f rom the site.
Describe the final stabilization/termination design to minimize erosion and prevent
stormwater impacts after construction is complete.
This Construction SWPPP includes the following:
Identification of the Construction SWPPP Coordinator with a description of this person's
duties.
Identification of the Stormwater Pollution Prevention Team (SWPP Team) that will assist in
implementation of the Construction SWPPP during construction.
Description of the existing site conditions, including existing land use for the site, soil types
at the site, as well as the location of surface waters that are located on or next to the site.
Identification of the body or bodies of water that will receive runoff from the construction
site, including the ultimate body of water that receives the stormwater.
Identification of drainage areas and potential stormwater contaminants.
Description of stormwater management controls and various Best Management Practices
(BMPs) necessary to reduce erosion, sediment, and pollutants in stormwater discharge.
Description of the facility monitoring plan, and how controls will be coordinated with
construction activities.
Description of the implementation schedule and provisions for amendment of the plan.
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2.0 Conditions of Use
This report accompanies the civil engineering plans and documents for the Compton Lumber
Renton project located at 2940, 2960, 2980, and 2990 East Valley Road in the city of Renton.
The site is divided into four parcels: 3023059091 (southwest), 3023059096 (north), 30 23059098
(central), and 3023059099 (south). The project proposes to consolidate three of the four parcels
into a single parcel, and then develop the site with a 50,000 square foot retail/commercial
building, associated parking, and a paved lumberyard. The project site is approximately 4.28
acres in size.
Stormwater management is to comply with the 2016 King County Surface Water Design Manual
(KCSWDM), as amended by the City of Renton, the 2016 City of Renton Surface Water Design
Manual (CRSWDM).
One construction access route is proposed at the location of the existing access driveway on the
south side of the project site, off East Valley Road. The site will be protected with silt fence and
all adjacent inlets will have inlet protections. There is a wetland on the south and east sides of
the project site. Once the wetland is restored, it will be fenced off and protected from construction
activities. Straw wattles or silt fence will be used to protect this wetland.
3.0 Existing Site Conditions
3.1 Existing Cover
The site sits on four parcels that total 5.85 acres near the intersection of East Valley Road and
SW 27th Street. The site is bordered to the west by East Valley Road, to the south by an
undeveloped parcel, to the east by SR 167 and to the north by a bus iness park.
East Valley Road is a three-lane HMA arterial roadway with a concrete sidewalk and no planter
strip. Access is provided to East Valley Road via three driveway drops. The four parcels onsite
currently house a lumber sales business, a towing business, and an excavation business. The
sites are developed with extensive areas of paving and various structures.
There is a Category III wetland on the eastern and southern portions of the site. The wetland is
not protected, with areas of the wetland being used for parking (parts of the wetland buffer are
currently paved). The portions of the wetland without development are covered in shrubs and
small trees. The remainder of the site is covered in impervious pavement.
3.2 Topography and Design
The site is flat with no measurable slope across the project. Runoff from the existing site either
drains to the onsite storm system that connects to the municipal system located within E ast
Valley Road, or it drains to the wetland onsite.
The proposed project plans to collect all pollution generating impervious surface (PGIS) runoff via
a system of interconnected inlets. This runoff will be treated via a series of Filterra vaults before
discharging into the municipal system located within E ast Valley Road. All clean runoff collected
via subsurface roof drains will be conveyed to a level spreader , where the runoff will discharge
into the restored wetland.
3.3 Adjacent Areas
The site is bordered to the west by East Valley Road, to the south by an undeveloped parcel, to
the east by SR 167 and to the north by a business park.
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4.0 ESC Plan Analysis and Design (Part A)
4.1 ESC Measures
The purpose of this section is to describe how each of the 13 erosion and sediment control (ESC)
measures has been addressed and to identify the type and location of BMPs used to satisfy the
required measure.
4.1.1 Clearing Limits
Clearing limits are identified on the plans. Prior to beginning land disturbing activities, clearing
limits will be marked with flagging (BMP D.2.1.1) or high visibility plastic or metal fence
(BMP D.2.1.1.1).
4.1.2 Cover Measures
Because source control is the most important form of erosion control, construction practices must
adhere to strict cover requirements. Exposed and unworked soils shall be stabilized with the
application of effective BMPs to prevent erosion throughout the life of the project. The specific
BMPs for soil stabilization that shall be used on this project include:
Mulching (BMP D.2.1.2.2)
Temporary and Permanent Seeding (BMP D.2.1.2.6)
More specifically, during the period of May 1 through September 30, the Contractor will not be
allowed to leave soils unprotected for more than seven days, and immediate seeding will be
required for areas brought to finish grade with no further work planned for the next 30 days.
Areas to be paved may be armored with crushed rock subbase in place of other stabilizing
measures. The area of clearing will be limited to the amount that can be stabilized by
September 30, of that year.
During the period of October 1 through April 30, all disturbed soil areas will be covered or
stabilized within two days or 24 hours when a major storm even is predicted. Cover measures
may include mulching, netting, plastic sheeting, erosion control blankets, or free draining mate rial.
The extent of clearing shall be limited to the amount of land that can be covered or stabilized
within 24 hours.
Soil stockpiles shall be stabilized by plastic covering or surrounded by filter fabric fence.
The Contractor has the option of providing all required material for cover measures onsite at all
times, or preparing a plan of action to submit to the City of Renton. A plan of action shall contain
the following:
Contractor’s name, address, phone number, and emergency phone number.
Alternate contact with above information.
Clearly defined plan of action designed to prevent offsite migration of sediments, which will
be implemented in the event that a major storm is predicted or offsite erosion is observed
by the Contractor, his/her employees, or the City.
Description of materials to be used for cover and means by which it will be placed. List
equipment to be used or number of personnel anticipated to be used to spread material.
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Vendor or supplier of materials used; list two alternates and inc lude phone numbers.
Means and timeframe for cleanup of any materials that escape offsite and for repairs to the
natural system if damages have occurred.
In order for the ESC facilities to function properly, they must be maintained and sediment
removed on a regular basis. Inspection and sediment removal shall be performed on all ESC
facilities, as described in the inspection schedule located in Section 7.3 of this report.
4.1.3 Perimeter Protection
Perimeter protection to filter sediment from sheet wash shall be located downslope of all
disturbed areas and shall be installed prior to upslope grading. Filter fabric fencing (BMP
D.2.1.3.1) will be required around the south, north, and east edges of the site and around
stockpile areas to prevent sediment-laden stormwater from being transported offsite. During the
wet season, 50 linear feet of filter fabric fencing per acre will be required.
4.1.4 Traffic Area Stabilization
A stabilized construction entrance shall be installed as the first step of clearing and grading. The
stabilized construction entrance (BMP D.2.1.4.1) will be used to prevent the transport of sediment
onto the adjacent paved surfaces. If sediment is transported onto the road surface, the road shall
be cleaned each day by sweeping or vacuuming prior to washing. Sediment removal by washing
alone will not be allowed. If sediment is tracked from the site, the City may require stabilization of
internal roads and car parking areas to contain the sediment (BMP D.2.1.4.2) or require the
installation of a wheel wash basin (BMP D.2.1.4.3).
4.1.5 Sediment Retention
The first priority is to keep all access roads clean of sediment and keep street wash water
separate from entering storm drains until treatment can be provided. Storm drain inlet protection
(BMP D.3.5.3) will be implemented for all drainage inlets and culverts that could potentially be
impacted by sediment-laden runoff on and near the project site, including offsite catch basins
located downstream of the project site. Drop inlet protection measures will be applied on this
project. Storm drain inlet sediment protection will prevent coarse sediment from entering the
drainage system prior to permanent stabilization of the disturbed areas.
4.1.6 Surface Water Collection
Interceptor swales or dikes (BMP D.2.1.6.1) will be installed at the top of all slopes in excess of
3H:1V and greater than 20 feet of elevation change.
Outlet protection (BMP D.2.1.6.5) is required at the outlets of all ponds, pipes, ditches, or other
approved conveyances, and where runoff is conveyed to natural or manmade drainage features
such as a stream, wetland, lake, or ditch.
4.1.7 Dewatering Control
Dewatering during construction is not anticipated. The proposed combined constructed
wetland/detention pond will not be utilized for infiltration, and therefor runoff generated at any
potential dewatering activities may be discharged directly into the temporary sediment pond
located above the proposed combined constructed wetland/detention pond.
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4.1.8 Dust Control
Dust control shall be implemented when exposed soils are dry to the point that wind transport is
possible and roadways, drainage ways, or surface waters are likely to be impacted. Water shall
be used on exposed soils by spraying until wet, but runoff shall not be generated by spraying.
Exposed areas shall be resprayed as needed. Oil shall not be used for dust control.
4.1.9 Flow Control
Stormwater flows during construction are expected to be minimal. Stormwater shall discharge
through the existing inlets, and then follow the natural drainage path of the site.
4.1.10 Control Pollutants
Stormwater Pollution Prevention and Spill (SWPPS) measures are required to prevent, reduce, or
eliminate the discharge of pollutants to onsite or adjacent stormwater systems or watercourses
for construction-related activities. Section 5.0 identifies these SWPPS measures.
4.1.11 Protect Existing and Proposed Flow Control BMPs
Protection measures shall be applied/installed and maintained to prevent adverse impacts to
areas of proposed flow control BMPs within the project site. There are no known existing flow
control BMPs located on the project site.
The proposed combined constructed wetland/detention pond area will not be an infiltration facility,
and therefore does not need to be protected from clogging during construction.
The contractor is responsible for protecting flow control BMPs.
4.1.12 Maintain BMPs
Protection measures, per BMP D.2.1.11, shall be maintained to assure continued performance of
their intended function and protect other disturbed areas of the project. There are no known
existing flow control BMPs located on the project site.
The Contractor is responsible for maintaining all temporary and permanent BMPs.
4.1.13 Manage the Project
Coordination and timing of site development activities relative to ESC concerns (Section D.2.4 of
the CRSWDM) and timely inspection, maintenance, and update of protective measures
(Section D.2.3 of the CRSWDM) are necessary to effectively manage the project and assure the
success of protective ESC and SWPPS design and implementation.
The Contractor is responsible for managing the project.
4.2 Erosion Problem Areas
The erosion potential of the site soils is moderate to low, as there are no known historic erosion
problems within or around the project site. Refer to Appendix B for recommended King County
Source Control BMPs.
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5.0 Stormwater Pollution Prevention and Spill (SWPPS) Plan Design (Part B)
The Stormwater Pollution Prevention and Spill (SWPPS) Plan includes three elements: a site plan
(Sheets A-4 and A-5, provided in Appendix A), a pollution prevention report (this document), and
a spill prevention and cleanup report. The spill prevention and cleanup report includes identifying
the expected sources of potential pollution and spills that may occur during construction, and
works to develop a plan to prevent pollution and spills. It also develops a plan to mitigate spills
that may occur. The SWPPS Plan will be kept onsite at all times during construction. The
General Contractor will be responsible to ensure that subcontractors are aware of the SWPPS
Plan, and a form or record will be provided stating that all subcontractors have read and agree to
the SWPPS Plan. An employee training worksheet is provided for the Contractor’s use (see
Appendix C).
A SWPPS Site Plan has been submitted with the civil engineering plans and can be found in
Appendix A on Sheets A-4 (TESC Plan) and A-5 (TESC Notes and Details) (to be updated with
input from the Contractor). The SWPPS Site Plan, Pollution Prevention Report, and Spill
Prevention and Cleanup Report have been developed, and BMPs have been selected based on
Section 2.3.1.4 of the CRSWDM and the King County Stormwater Pollution Prevention Manual
(KCSPPM). (The below plan will be updated with input from the Contractor.)
5.1 Pollution and Spill Prevention Source Controls and BMPs
The sources of pollution and spills will be identified by the Contractor in the spaces provided
below, and the BMPs to be used for each source for prevention of both pollution and spills will be
provided by the Contractor in the spaces provided below:
Liquids that will be handled or stored onsite are the following: __________. Containers will be
stored as shown on Sheet __________ and include the following types and sizes: ___________.
Tight-fitting lids shall be placed on all containers containing liquids. Containers shall be covered
with plastic sheeting during rain events. Drip pans or absorbent materials shall be placed
beneath all mounted container taps and at all potential drip and spill locations during filling and
unloading of containers. Containers shall be stored such that if a container leaks or spills, the
contents will not be discharged, flow, or be washed into the storm drainage system, surface
water, or groundwater. Appropriate spill cleanup materials shall be stored and maintained near
the container storage area. Storage area shall be swept and cleaned as needed. Area shall not
be hosed down such that water drains to the storm drainage system or neighboring areas.
Containers shall be checked daily for leaks and spills and replaced as necessary. All spilled
liquids will be collected and disposed of properly. Spill control devices shall be routinely
inspected on a weekly basis.
Dry pesticides and fertilizers shall be covered with plastic sheeting or stored in a sealed
container. Materials shall be stored on pallets or another raised method to prevent contact with
stormwater runoff. Alternatively, the materials shall be contained in a manner such that if the
container leaks or spills, the contents will not discharge, flow, or be washed into the storm
drainage system, surface waters, or groundwater. Maintenance requirements are the same as
liquid materials described above.
Chemicals that will be handled or stored onsite are the following: __________. Containers will
be stored as shown on Sheet __________ and include the following types and sizes:
__________. BMPs and Maintenance requirements are the same as liquids with the addition of
the following __________.
Soil, sand, and other erodible materials shall be stored onsite as shown on Sheet
__________. Materials shall be covered with plastic sheeting per Detail 6 on Sheet C203.
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Perimeter controls shall be constructed as shown on the TESC plan to prevent eroded materials
from leaving the project site.
Fueling shall not occur onsite. If fueling does occur onsite, the Contractor shall develop a
containment plan for spills and provide lighting and signage if fueling occurs at night in
conformance with the KCSPPM.
Maintenance and repair of vehicles shall not occur onsite. If maintenance or repair of vehicles
does occur onsite, the Contractor shall develop a spill prevention plan in C onformance with the
KCSPPM.
Truck wheel washing shall occur at the wheel wash station as shown on Sheet __________. All
other vehicle washing shall occur in a controlled manner, such that runoff is collected and
disposed of in a legal manner. Washing areas must be lined with an impervious membrane to
prevent contamination of groundwater.
Rinsing of hand tools shall occur as located on Sheet __________. Water for washing shall be
collected and disposed of in a legal manner.
Contaminated soils shall be covered with plastic sheeting or contained to prevent stormwater
from carrying pollutants away to surface or ground waters. Appropriate spill cleanup materials,
such as brooms, dustpans, vacuum sweepers, etc., shall be stored and maintained near the
storage area. Storage area shall be swept and cleaned as needed. Area shall not be hosed
down such that water drains to the storm drainage system, groundwater, surface water, or
neighboring areas.
During concrete and asphalt construction, the Contractor shall provide the following BMPs or
equivalent measures, methods or practices as required:
1. Drip pans, ground cloths, heavy cardboard or plywood wherever concrete, asphalt and
asphalt emulsion chunks and drips are likely to fall unintentionally, such as beneath
extraction points from mixing equipment.
2. Storm drain inlet protection is being provided as shown on Sheet C1.01. Storm drains shall
be covered to prevent concrete and asphalt from entering the storm system.
3. Concrete, concrete slurry, and rinse water shall be contained and collected and shall not be
washed or allowed to discharge into storm drain, ditch, or neighboring parcels. All
collected runoff shall be properly disposed of.
4. Contractor shall designate an area where application and mixing equipment cleaning will
be conducted. Rinse water and slurry shall be collected, contained, and disposed of in a
legal manner.
5. Routine maintenance: the pouring area shall be swept at the end of each day or more
frequently if needed. Loose aggregate chunks and dust shall be collected. Areas shall not
be hosed down.
The Contractor may provide the following optional BMPs if the above do not provide adequate
source controls:
6. Cover portable mixing equipment with an awning or plastic sheeting to prevent contact with
rainfall.
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7. Provide catch basin inserts configured for pollutant removal.
Water with elevated pH levels shall not be discharged from the site. Contractor shall monitor
stormwater for pH prior to discharging from the site. Contractor shall implement a pH treatment
plan if pH is not within the natural range
5.2 Responsible Personnel and Contact Information
[name] with [company] shall be responsible for pollution and spill prevention and
cleanup and can be contacted at [phone] or [email] .
Contractor shall fill out the attached Pollution Prevention Team Worksheet (see Appendix C).
5.3 Pollution and Spill Prevention Worksheets
Pollution prevention, BMP implementation reports, material inventory worksheets, pollutant
source identification worksheet, and spill/leak report may be found attached as Appendix C.
5.4 Disposal Methods
Contractor shall dispose of contaminated soils and water in a legal manner. Options include the
following: Disposal at a local landfill or at a recycling center, as allowed.
6.0 ESC Performance and Compliance Provisions
6.1 ESC Supervisor
The Contractor shall appoint a Certified Erosion and Sediment Control Lead (CESCL) or Certified
Professional in Erosion and Sediment Control (CPESC) (BMP D.4.1) for the project, and the
appointee must be approved by the City.
The duties of the CESCL or CPESC include:
Maintaining files onsite at all times, which include the Construction SWPPP and any
associated permits and plans.
Directing BMP installation, inspection, maintenance, modification, and removal.
Keeping a log of all turbidity measurements taken onsite and making it available to the City
of Renton Community & Economic Development upon request.
Updating all project drawings and the Construction SWPPP with changes made.
Keeping daily logs and inspection reports.
Facilitating, participating in, and taking corrective actions resulting from inspections
performed by outside agencies or the Owner.
To aid in the implementation of the Construction SWPPP, the members of the SWPP Team
include the following: the Contractor, the CESCL or CPESC, the City of Renton Inspector, and
Compton Lumber. The General Contractor will ensure all housekeeping and monitoring
procedures are implemented, while the CESCL or CPESC will ensure the integrity of the
structural BMPs. The City of Renton Inspector and AHBL will observe construction and erosion
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control practices and recommend revisions or additions to the Construction SWPPP and
drawings.
6.2 Monitoring of Discharges
The ESC supervisor shall have a turbidity meter onsite and shall use it to monitor surface and
stormwater discharges from the project site whenever runoff occurs from onsite activities. A log
of all turbidity measurements taken onsite shall be kept and made available to the City of Renton
upon request.
6.3 ESC Performance
ECS measures shall be installed and maintained to prevent, to the maximum extent practicable,
the transport of sediment from the project site to downstream drainage systems. Storm water
turbidity shall be monitored based on Section D.4.3 of the CRSWDM.
6.4 Flexible Compliance
The project site has well drained soils and multiple closed depressions. Any deviation to the
Construction SWPPP will be documented and reported to the City for approval.
6.5 Roads and Utilities Compliance
No alternative BMPs are used in road and utility compliance.
6.6 Alternative and Experimental Measures
No alternative or experimental measures are to be used at this time.
7.0 ESC Implementation Requirements
7.1 Wet Season Requirements
All of the following provisions for wet season construction are detailed in referenced sections:
1. The allowed time that a disturbed area may remain unworked without cover measures is
reduced to two consecutive working days, rather than seven (D.3.2).
2. Stockpiles and steep cut and fill slopes are to be protected if unworked for more than
12 hours (D.3.2).
3. Cover materials sufficient to cover all disturbed areas shall be stockpiled onsite (D.3.2).
4. All areas that are to be unworked during the wet season shall be seeded within one week
of the beginning of the wet season (D.3.2.5).
5. Mulch is required to protect all seeded areas (D.3.2.1).
6. Fifty linear feet of filter fabric fence (and the necessary stakes) per acre of disturbance
must be stockpiled onsite (D.3.3.1).
7. Construction road and parking lot stabilization are required for all sites, unless the site is
underlain by coarse-grained soil (D.3.4.2).
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8. Sediment retention is required unless no offsite discharge is anticipated for the specified
design flow (D.3.5).
9. Surface water controls are required, unless no offsite discharge is anticipated for the
specified design flow (D.3.6).
10. Phasing and more conservative BMPs must be evaluated for construction activity near
surface waters (D.5.3).
11. Any runoff generated by dewatering may be required to discharge to the sanitary sewer
(with appropriate discharge authorization), portable sand filter systems, or holding tanks
(D.2.1.7)
12. The frequency of maintenance review increases from monthly to weekly (D.5.4).
7.2 Critical Areas Restriction
There is a Category III wetland with a 56.25-foot buffer located on the eastern and southern
portions of the site. Once this wetland is restored via the instructions of the Sound View
Consultants Restoration Plan, it shall be protected via silt fence and straw wattles, and all other
construction activities shall not occur in either the buffer or the wetland.
7.3 Maintenance Requirement
All ESC measures shall be maintained and reviewed on a regular basis, as prescribed in the
maintenance requirements for each BMP (see Appendix B). The ESC supervisor shall review the
site at least twice a month during the dry season, weekly during the wet season, and within
24 hours of significant storms. The City may require that a written record of these reviews be
kept onsite, with copies submitted to City of Renton Community & Economic Development within
48 hours.
Documentation
If DDES requires that a written record be maintained, a standard ESC Maintenance Report (D-95)
may be used. A copy of all required maintenance reports shall be kept onsite throughout the
duration of construction.
The maintenance inspection report will be made after each inspection. Copies of the report forms
to be completed by the Construction SWPPP Coordinator are included in Appendix C of this
Construction SWPPP. Completed forms will be provided to the City Inspector and will also be
maintained onsite during the entire construction project. If construction activities or design
modifications are made to the site plan that could impact stormwater, or if the Engineer of Record
determines that the measures are not adequate to prevent erosion and the discharge of sediment
from the site (based on turbidity measurements), this Construction SWPPP will be amended
appropriately. The amended Construction SWPPP will have a description of the new activities
that contribute to the increased pollutant loading and the planned source control activities.
Review Timing
During the wet season, weekly reviews shall be carried out every six to eight calendar days.
During the dry season, monthly reviews shall be carried out within three days of the calendar day
for the last inspection. Reviews shall also take place within 24 hours of significant storms. In
general, a significant storm is one with more than 0.5 inch of rain in 24 hours or less.
ESC Plan for Construction Stormwater Pollution Prevention
Compton Lumber Renton 11
2190112.10
In order for the ESC facilities to function properly, they must be maintained and sediment
removed on a regular basis. Inspection and sediment removal shall be p erformed on all ESC
facilities, as described in the Inspection and Maintenance Report Forms included in Appendix C .
7.4 Construction Sequence
1. Hold the pre-construction meeting.
2. Post sign with name and phone number of ESC Supervisor (may be consolidated with the
required notice of construction sign).
3. Flag or fence clearing limits.
4. Install inlet sediment protection.
5. Grade and install construction entrance.
6. Install perimeter protection (silt fence).
7. Grade and stabilize construction roads.
8. Maintain erosion control measures in accordance with City of Renton standards and
manufacturer’s recommendations.
9. Relocate erosion control measures or install new measures so that, as site conditions
change, the erosion and sediment control is always in accordance with the City of Renton
erosion and sediment control standards.
10. Cover all areas that will be unworked for more than seven days during the dry season or
two days during the wet season with straw, wood fiber mulch, compost, plastic sheeting, or
equivalent.
11. Stabilize all areas within seven days of reaching final grade.
12. Seed, sod, stabilize, or cover any areas to remain unworked for more than 30 days.
13. Upon completion of the project, stabilize all disturbed areas and remove BMPs , if
appropriate, and upon approval of the owner or engineer.
7.5 Final Stabilization
Prior to obtaining final construction approval, the site shall be stabilized, the structural ESC
measures such as silt fences removed, and drainage facilities cleaned.
To obtain final construction approval, the following conditions must be met:
1. All disturbed areas of the site shall be vegetated or otherwise permanently stabilized. At a
minimum, disturbed areas shall be seeded and mulched with a high likelihood that
sufficient cover will develop shortly after final approval. Mulch without seeding is not
adequate to allow final approval.
2. Structural measures, such as, but not limited to, filter fabric fences, pipe slope drains,
construction entrances, and storm drain inlet protection, shall be removed from the site.
Measures that will quickly decompose, such as brush barriers and organic mulches, may
ESC Plan for Construction Stormwater Pollution Prevention
Compton Lumber Renton 12
2190112.10
be left in place. The City of Renton inspector must approve an applicant’s proposal to
remove fencing prior to the establishment of vegetation.
3. All permanent surface water facilities, including catch basins, manholes, pipes, ditches,
channels, flow control facilities, and water quality facilities, shall be cleaned. Any offsite
catch basin that required protection during construction shall also be cleaned
7.6 NPDES Requirements
The CRSWDM is equivalent to the EPA required NPDES permit through the Stormwater
Management Manual for Western Washington (Department of Ecology, 2012). The Department
of Ecology stormwater permit application requires the filling of a Notice of Intent (NOI) at least
30 days prior to the start of construction
7.7 Forest Practice Permit Requirements
The project does not clear more than 5,000 board feet of timber and does not require a Class IV
Special Forest Practice permit from the Washington State Department of Natural Resources.
The existing low quality dogwood trees found on the project site shall be removed as part of the
project improvements due to their low quality designation. Proposed site improvements include
tree plantings to mitigate for this tree removal.
8.0 Construction Schedule
Construction is scheduled to begin in April 2019 and be completed by November 2019.
This analysis is based on data and records either supplied to or obtained by AHBL. These documents
are referenced within the text of the analysis. The analysis has been prepared using procedures and
practices within the standard accepted practices of the industry. We conclude that this project, as
proposed, will not create any new problems within the existing downstream drainage system. This project
will not noticeably aggravate any existing downstream problems due to either water quality or quantity.
AHBL, Inc.
Daniel Hendrickson, EIT
Project Engineer
DJH/lsk
March 2019
Q:\2019\2190112\10_CIV\NON_CAD\REPORTS\CSWPPP\20190226 Rpt (CSWPPP) 2190112.10.docx
ESC Plan for Construction Stormwater Pollution Prevention
Compton Lumber Renton
2190112.10
Appendix A
Exhibits
A-1 .................... Vicinity Map
A-2 .................... Existing Conditions Map
A-3 .................... NRCS Soil Survey Map
A-4 .................... TESC Plan
A-5 .................... TESC Notes and Details
2215 North 30th Street,
Suite 300,
Tacoma, WA 98403
253.383.2422 TEL
253.383.2572 FAX
JOB NO:
DATE:
RENTON EAST VALLEY ROAD
VICINITY MAP
SCALE: 1" = 1/4 MILE (1320')EX-1
2/20/17
2160915.10
SW 34TH ST
SW 27TH ST
SW 23RD ST
LIND AVE SWSW 19TH ST
167
167OAKESDALE AVE NW515
515
515
E VALLEY RDSITE
TALBOT RD SSW 29TH ST
11+00 12+00 13+00 14+00 15+00 16+00 17+00
18+00 TEAST VALLEY ROAD
EAST VALLEY ROAD
SW 27TH ST
N
GRAPHIC SCALE
0 40 80
1" = 40 FEET
20
DATE: February 25, 2019 FILENAME: Q:\2019\2190112\10_CIV\CAD\2190112-SH-COVER.dwg
C0.02
2
EXISTING CONDITIONS
Know what's below.
before you dig.Call
R
1
2
3
4
TEL FAX www.ahbl.comWEBTELFAXwww.ahbl.comWEBTELFAXwww.ahbl.comWEB
2215 North 30th Street, Suite 300 Tacoma, WA 98403
253.383.2422TEL 253.383.2572FAX www.ahbl.comWEB
TACOMA SEATTLE SPOKANE TRI-CITIES
12
TCSDJHDJH
02.22.2019
PERMIT SET
2190112.10
14900 INTERURBAN AVE S, SUITE 138
TUKWILA, WA 98168
CONTACT: MR. LES SEIFERT
EMAIL: les@ronhovdearchitects.com
RONHOVDE
ARCHITECTS LLC
COMPTON LUMBER
RENTON
A PORTION OF THE SW 1/4 OF THE NE 1/4 OF SEC. 30, TWN. 23 N., RGE. 05 E. W.M.
CITY OF RENTON, KING COUNTY, WASHINGTON.
COMPTON LUMBER RENTON
Soil Map—King County Area, Washington
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
5/10/2017
Page 1 of 352558505255870525589052559105255930525595052559705255990525601052560305256050525607052560905256110525613052558705255890525591052559305255950525597052559905256010525603052560505256070525609052561105256130558920558940558960558980559000559020559040559060559080
558920 558940 558960 558980 559000 559020 559040 559060 559080
47° 27' 21'' N 122° 13' 6'' W47° 27' 21'' N122° 12' 57'' W47° 27' 12'' N
122° 13' 6'' W47° 27' 12'' N
122° 12' 57'' WN
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84
0 35 70 140 210
Feet
0 10 20 40 60
Meters
Map Scale: 1:794 if printed on B portrait (11" x 17") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point Features
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: King County Area, Washington
Survey Area Data: Version 12, Sep 8, 2016
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Aug 31, 2013—Oct 6,
2013
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
Soil Map—King County Area, Washington
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
5/10/2017
Page 2 of 3
Map Unit Legend
King County Area, Washington (WA633)
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
Tu Tukwila muck 4.1 63.6%
Ur Urban land 2.4 36.4%
Totals for Area of Interest 6.5 100.0%
Soil Map—King County Area, Washington
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
5/10/2017
Page 3 of 3
IP
IP
IP
CE
SF
SF
IP
2
3
3
1
SL
SL
CL
CL
2
2
SL
WR
WR
WR SP
4
5
5 WASHINGTON STATE ROUTE 167T
EAST VALLEY ROADEAST VALLEY ROADSW 27TH ST(TYP)
(TYP)
(TYP)
N
GRAPHIC SCALE
0 40 80
1" = 40 FEET
20
LEGEND:
INLET PROTECTION
REMOVE EXISTING UTILITY
CONSTRUCTION ENTRANCE
CLEARING/PROJECT LIMITS
SAWCUT LINE
SILT FENCE
WR WETLAND RESTORATION
SP STOCKPILE LOCATION
IP
CE
CL
SL
SF
KEY NOTES
PRESERVE EXISTING UTILITY TO REMAIN.
REMOVE EXISTING CATCH BASIN. CAP AND ABANDON EXISTING PIPE
EXCEPT UNDER NEW BUILDING LOCATION REMOVE PIPE.
REMOVE EXISTING SITE FEATURE
DEMO SIDEWALK CURB AND GUTTER
ABANDON EXISTING UTILITY
1
2
3
4
5
CONSTRUCTION SEQUENCE
1.CLEARLY MARK THE CLEARING LIMITS BY FLAGGING AND/OR HIGH VISIBILITY FENCE.
2.SCHEDULE AND ATTEND PRECONSTRUCTION MEETING WITH CITY OF RENTON.
3.PROVIDE MISCELLANEOUS DEMOLITION AND CLEAR AND GRUB AREA WITHIN CLEARING LIMITS REQUIRED FOR
INSTALLATION OF TEMPORARY EROSION CONTROL FACILITIES. ALL EROSION AND SEDIMENT CONTROL FACILITIES
SHOWN ON THE EROSION CONTROL PLAN SHALL BE INSTALLED PRIOR TO OR AS A FIRST STAGE OF SITE
PREPARATION.
4.THE CONTRACTOR SHALL INSPECT EROSION CONTROL MEASURES AND PROVIDE REPAIRS AS NEEDED PER THE
PROJECT CSWPPP.
5.CLEAR AND GRUB THE REMAINDER OF THE SITE WITHIN CLEARING LIMITS, AND ROUGH GRADE.
6.PROVIDE COVER MEASURES, AS REQUIRED, TO INCLUDE ARMORING, MULCHING, AND HYDROSEEDING TO STABILIZE
DENUDED AREAS AND PREVENT THE TRANSPORT OF SEDIMENT-LADEN STORMWATER OFFSITE.
7.PROVIDE STORM SYSTEM AND MISCELLANEOUS UTILITIES AS SHOWN ON THE PLANS. PROVIDE INLET PROTECTION
ON ALL NEW CATCH BASINS.
8.FINE GRADE SITE AND PAVE. COORDINATE WITH CITY FOR REQUIRED INSPECTIONS.
9.STABILIZE ALL REMAINING DISTURBED AREAS.
10.COORDINATE WITH CITY FOR FINAL INSPECTION.
11.REMOVE REMAINING TEMPORARY EROSION CONTROL DEVICES WHEN AREA HAS BEEN PERMANENTLY STABILIZED
WITH VEGETATION AND REMOVAL IS APPROVED BY THE CITY.
Know what's below.
before you dig.Call
R
WETLAND RESTORATION
THE ONSITE WETLAND AND ASSOCIATED BUFFER SHALL BE RESTORED PER THE DIRECTIONS OF SOUND VIEW CONSULTANT'S
WETLAND AND FISH AND WILDLIFE HABITAT ASSESSMENT AND RESTORATION PLAN WHICH CAN BE FOUND IN APPENDIX B OF
THE TECHNICAL INFORMATION REPORT. THE RESTORATION ACTIONS FOR THE WETLAND AND BUFFER INCLUDE BUT MAY NOT
BE LIMITED TO THE FOLLOWING RECOMMENDATIONS.
·REMOVAL OF PAVED SURFACES AND TRASH AND DEBRIS WITHIN THE WETLAND BUFFER;
·PRE-TREAT INVASIVE PLANTS WITH AN HERBICIDE APPROVED BY WASHINGTON DEPARTMENT OF AGRICULTURE, THEN GRUB TO
REMOVE THE INVASIVE PLANTS, AND REPLANT ALL CLEARED AREAS WITH USING THE NATIVE SPECIES OUTLINED IN TABLE 6-8 AND
APPENDIX C OF THE WETLAND REPORT. PRE-TREATMENT OF THE INVASIVE PLANTS SHOULD OCCUR A MINIMUM OF TWO WEEKS
PRIOR TO REMOVAL.
·REPLANT ALL AREAS WITH NATIVE TREES, SHRUBS, AND GROUNDCOVERS LISTED IN SECTION 7.6.3, OR SUBSTITUTES APPROVED BY
THE RESPONSIBLE WETLAND SCIENTIST, TO HELP RETAIN SOILS, FILTER STORMWATER, AND INCREASE BIODIVERSITY.
·AN APPROVED NATIVE SEED MIX WILL BE USED TO SEED THE DISTURBED AREAS AFTER PLANTING.
·MAINTAIN AND CONTROL INVASIVE PLANTS ANNUALLY, AT A MINIMUM, OR MORE FREQUENTLY IF NECESSARY. MAINTENANCE TO
REDUCE THE GROWTH AND SPREAD OF INVASIVE PLANTS IS NOT RESTRICTED TO CHEMICAL APPLICATIONS BUT MAY INCLUDE HAND
REMOVAL, IF WARRANTED.
·PROVIDE DRY-SEASON IRRIGATION AS NECESSARY TO ENSURE NATIVE PLANT SURVIVAL.
·DIRECT EXTERIOR LIGHTS AWAY FROM THE WETLANDS WHEREVER POSSIBLE.
·PLACE ALL ACTIVITIES THAT GENERATE EXCESSIVE NOISE (E.G., GENERATORS AND AIR CONDITIONING EQUIPMENT) AWAY FROM THE
WETLANDS WHERE FEASIBLE.
CITY OF
RENTON
IN COMPLIANCE WITH CITY OF RENTON STANDARDSAAANNNNNNN
COMPTON LUMBER RENTON
A-NNNNNNN
TEL FAX www.ahbl.comWEBTELFAXwww.ahbl.comWEBTELFAXwww.ahbl.comWEB
2215 North 30th Street, Suite 300 Tacoma, WA 98403
253.383.2422TEL 253.383.2572FAX www.ahbl.comWEB
TACOMA SEATTLE SPOKANE TRI-CITIES
1
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DATE: March 14, 2019 FILENAME: Q:\2019\2190112\10_CIV\CAD\2190112-SH-TESC.dwg
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TESC
GENERAL EROSION CONTROL NOTES
1. ON-SITE EROSION CONTROL MEASURES SHALL BE THE RESPONSIBILITY OF THE DEVELOPER. ANY
PROBLEMS OCCURRING BEFORE FINAL ACCEPTANCE OF THE STORM SYSTEM BY THE MUNICIPALITY SHALL
BE CORRECTED BY THE APPLICANT AND/OR THE CONTRACTOR.
2. IN CASE EROSION OR SEDIMENTATION OCCURS TO ADJACENT PROPERTY, ALL CONSTRUCTION WORK
WITHIN THE DEVELOPMENT THAT WILL AGGRAVATE THE SITUATION MUST CEASE AND THE
APPLICANT/CONTRACTOR SHALL IMMEDIATELY COMMENCE RESTORATION OR MITIGATION MEASURES.
RESTORATION ACTIVITY SHALL CONTINUE UNTIL SUCH TIME AS THE PROBLEM IS RECTIFIED.
3. ALL EROSION AND SEDIMENTATION CONTROL DEVICES SHOWN ON THIS DRAWING SHALL BE INSTALLED
PRIOR TO OR AS THE FIRST STAGE OF SITE PREPARATION.
4. SHOULD THE TEMPORARY EROSION AND SEDIMENTATION CONTROL MEASURES SHOWN ON THIS
DRAWING NOT PROVE ADEQUATE TO CONTROL EROSION AND SEDIMENTATION, THE
APPLICANT/CONTRACTOR SHALL INSTALL ADDITIONAL FACILITIES AS NECESSARY TO PROTECT ADJACENT
PROPERTIES, SENSITIVE AREAS, NATURAL WATER COURSES, AND/OR STORM DRAINAGE SYSTEMS.
5. IN ANY AREA WHICH HAS BEEN STRIPPED OF VEGETATION OR EXPERIENCED LAND DISTURBING
ACTIVITIES AND WHERE NO FURTHER WORK IS ANTICIPATED FOR A PERIOD EXCEEDING THE LISTED
CRITERIA, ALL DISTURBED AREAS MUST BE IMMEDIATELY STABILIZED WITH MULCHING, GRASS PLANTING,
OR OTHER APPROVED EROSION CONTROL TREATMENT APPLICABLE TO THE TIME OF YEAR IN QUESTION.
GRASS SEEDING ALONE WILL BE ACCEPTABLE ONLY DURING THE MONTHS OF APRIL THROUGH SEPTEMBER,
INCLUSIVE. SEEDING MAY PROCEED, HOWEVER, WHENEVER IT IS IN THE INTEREST OF THE
APPLICANT/CONTRACTOR, BUT MUST BE AUGMENTED WITH MULCH, NETTING, OR OTHER TREATMENT.
6. THE PROJECT ENGINEER OR PROJECT SURVEYOR WILL BE RESPONSIBLE FOR FIELD LOCATING THE
CLEARING LIMITS AND ESTABLISHING THOSE BOUNDARIES WITH BRIGHT COLORED FLAGGING. THE
CONTRACTOR SHALL CLEAR TO THE LIMITS AS ESTABLISHED ON THIS PLAN AND AS FLAGGED IN THE FIELD.
7. THE CITY SHALL BE RESPONSIBLE FOR THE INSPECTION AND ACCEPTANCE OF ALL CLEARING AND GRADE
WORK AND EROSION EROSION AND SEDIMENTATION CONTROL FACILITIES.
8. THE APPLICANT AND/OR CONTRACTOR SHALL NOTIFY THE CITY FORTY-EIGHT HOURS IN ADVANCE OF
EACH REQUIRED EROSION AND SEDIMENTATION CONTROL INSPECTION.
INSPECTION NO.1 - INSTALLATION OF EROSION CONTROL FACILITIES/PRIOR TO CLEARING
INSPECTION NO.2 - COMPLETION OF CLEARING
INSPECTION NO.3 - UPON COMPLETION OF EXCAVATION, FILLING, AND EARTHWORK.
INSPECTION NO.4 - COMPLETION OF PROJECT
INSPECTION NO.5 - AS NEEDED TO DETERMINE COMPLIANCE WITH APPROVED PLANS AND/OR
SPECIFICATIONS. (DOES NOT REQUIRE ADVANCED NOTICE).
8. ALL WORK ASSOCIATED WITH THE STABILIZING THE DISTURBED AREAS SHALL BE IN ACCORDANCE WITH
DEPARTMENT OF ECOLOGY'S STORMWATER MANAGEMENT MANUAL FOR WESTERN WASHINGTON 2014.
9. ALL NECESSARY FACILITIES SHALL BE MAINTAINED ON SITE TO PREVENT DEBRIS, DUST, AND MUD FROM
ACCUMULATING ON THE PUBLIC RIGHT-OF-WAY.
Know what's below.
before you dig.Call
R
1.CONTRACTOR IS RESPONSIBLE FOR ENSURING THAT ALL UTILITIES HAVE BEEN DISCONNECTED PRIOR TO COMMENCING DEMOLITION.
2.DEMOLITION: IT IS THE INTENT OF THE WORK UNDER THIS CONTRACT TO INCLUDE THE DEMOLITION OF ALL EXISTING BUILDINGS,
PAVING, UTILITIES AND OTHER EXISTING SITE IMPROVEMENTS INCLUDING THEIR UNDERGROUND COMPONENTS AS INDICATED BY
THIS DRAWING AND AS REQUIRED FOR NEW CONSTRUCTION. IT IS THE CONTRACTOR'S RESPONSIBILITY TO FULLY REVIEW THE SITE
CONDITIONS AND TO CORRELATE THESE OBSERVATIONS WITH THE PROJECT WORK AND INCLUDE ALL NECESSARY DEMOLITION,
WHETHER SHOWN OR NOT, AND INCLUDE ALL SUCH COSTS IN THE BASE BID.
3.CLEARING: IT IS THE INTENT OF THE WORK UNDER THIS CONTRACT TO CONDUCT ALL CLEARING NECESSARY TO BE ABLE TO
COMPLETE ALL THE WORK OF THIS PROJECT.
4.CONTRACTOR SHALL LEGALLY DISPOSE OF THE OWNER'S PROPERTY, ALL DEMOLISHED AND REMOVED MATERIALS, UNLESS
INDICATED OTHERWISE.
5.IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO COMPLETELY COORDINATE UTILITY DEMOLITION WITH NEW CONSTRUCTION.
CONTRACTOR SHALL ENSURE THAT ADEQUATE FIRE PROTECTION IN ACCORDANCE WITH THE FIRE MARSHALL REQUIREMENTS IS
PROVIDED FOR THE NEW BUILDING.
6.COORDINATE POWER DEMOLITION WITH FEDERAL WAY PUBLIC UTILITIES AND ELECTRICAL PLANS. CONTRACTOR TO ENSURE THAT
DEMOLITION OF LINES WILL NOT COMPROMISE POWER TO OTHER AREAS.
7.POWER AND CABLE SERVING BUILDINGS TO REMAIN RUN THROUGH THIS SITE. CONTRACTOR SHALL INSTALL NEW SERVICES TO
BUILDINGS REMAINING PRIOR TO DEMOLISHING EXISTING LINES.
8.GAS DISCONNECTION BY PSE CONTRACTOR TO COORDINATE WORK WITH PSE. CONTRACTOR TO DEMOLISH ABANDONED SERVICE.
CONTRACTOR TO ENSURE THAT DEMOLITION OF GAS LINES WILL NOT IMPACT GAS SERVICE TO OTHER AREAS. NO DISRUPTION IN
SERVICE ALLOWED.
9.ANY ABANDONED SIDE SEWER(S) SHALL BE PLUGGED OR CAPPED AT THE RIGHT-OF-WAY OR PROPERTY LINE.
10.CONTRACTOR SHALL MINIMIZE DUST GENERATION ONSITE BY SPRINKLING THE SITE WITH WATER UNTIL SURFACE IS WET. SEE BMP
C140.
11.SAWCUT CONCRETE SIDEWALK AT THE NEAREST JOINT.
12.ALL MONUMENTS DISTURBED AS A RESULT OF CONSTRUCTION ACTIVITIES SHALL BE REPLACED PER WAC 332-120 AT NOT
ADDITIONAL COST TO THE OWNER. CONTRACTOR SHALL APPLY FOR PERMIT FROM THE DEPARTMENT OF NATURAL RESOURCES AS
NECESSARY.
DEMOLITION NOTES
8' MAX.
1
1
PROVIDE SAND BAGS 10'
O.C. TO HOLD PLASTIC
COVERING IN PLACE
STOCKPILE
AREA
EXISTING
GRADE
1
1
NOTES:
1.STOCKPILES SHALL BE STABILIZED WITH PLASTIC COVERING OR OTHER APPROVED
DEVICE.
2.SEDIMENT LEACHING FROM STOCKPILES SHALL BE PREVENTED DURING ALL
SEASONS.
1.PLASTIC SHEETING SHALL HAVE A MINIMUM THICKNESS OF 6 MILS AND
SHALL MEET THE REQUIREMENTS OF THE WASHINGTON STATE
DEPARTMENT OF TRANSPORTATION STANDARD SPECIFICATIONS
SECTION 9-14.5(3).
2.COVERING SHALL BE INSTALLED AND MAINTAINED TIGHTLY IN PLACE BY
USING SANDBAGS OR TIRES ON ROPES WITH A MAXIMUM 10-FOOT GRID
SPACING IN ALL DIRECTIONS. ALL SEAMS SHALL BE TAPED OR
WEIGHTED DOWN FULL LENGTH. SEAMS SHALL HAVE AT LEAST A 12
INCH OVERLAP.
3.CLEAR PLASTIC COVERING SHALL BE INSTALLED IMMEDIATELY ON
AREAS SEEDED BETWEEN NOVEMBER 1 AND MARCH 31 AND REMAIN
UNTIL VEGETATION IS FIRMLY ESTABLISHED.
4.WHEN COVERING IS USED ON UN-SEEDED SLOPES, IT SHALL BE KEPT IN
PLACE UNTIL THE NEXT SEEDING PERIOD.
5.PLASTIC COVERING SHALL BE BURIED TWO FEET AT THE TOP OF
SLOPES IN ORDER TO PREVENT SURFACE WATER FLOW BENEATH
SHEETS.
6.PROPER MAINTENANCE OF COVERING INCLUDES, BUT IS NOT
NECESSARILY LIMITED TO, REGULAR CHECKS FOR AND REPAIRS OF
RIPS AND DISLODGED ENDS.
PLASTIC COVERING NOTES
CITY OF
RENTON
IN COMPLIANCE WITH CITY OF RENTON STANDARDSAAANNNNNNN
COMPTON LUMBER RENTON
A-NNNNNNN
TEL FAX www.ahbl.comWEBTELFAXwww.ahbl.comWEBTELFAXwww.ahbl.comWEB
2215 North 30th Street, Suite 300 Tacoma, WA 98403
253.383.2422TEL 253.383.2572FAX www.ahbl.comWEB
TACOMA SEATTLE SPOKANE TRI-CITIES
1 NOT TO SCALE
INLET PROTECTION 2 NOT TO SCALE
CONSTRUCTION ENTRANCE
3 NOT TO SCALE
SILT FENCE
4 NOT TO SCALE
STOCKPILE
DATE: March 14, 2019 FILENAME: Q:\2019\2190112\10_CIV\CAD\2190112-SH-TESC.dwg
C1.1
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TESC NOTES AND
DETAILS
ESC Plan for Construction Stormwater Pollution Prevention
Compton Lumber Renton
2190112.10
Appendix B
Select King County Source Control BMPs
ESC Plan for Construction Stormwater Pollution Prevention
Compton Lumber Renton
2190112.10
Appendix C
Inspection and Maintenance Report Forms