EPA Example Construction SWPPP:
Medium-Sized (~20-acre) Residential Subdivision
Introduction
This example Stormwater Pollution Prevention Plan (SWPPP) was prepared using the U.S.
Environmental Protection Agency's (EPA's) guide, Developing Your Stormwater Pollution
Prevention Plan: A Guide for Construction Operators and its accompanying SWPPP template.
Both the SWPPP Guide and the SWPPP template are available at
http://www.epa.gov/npdes/swpppguide. The instructions and references in this SWPPP refer to
the SWPPP template and are left in for illustrative purposes. The SWPPP guide, SWPPP
template, and this hypothetical SWPPP example are provided for compliance assistance purposes
only; for a complete list of permit requirements, refer to EPA's Construction General Permit at:
http://www.epa.gov/npdes/stormwater/cgp.
Use of this example SWPPP
This example SWPPP represents a hypothetical project for the construction of a residential
subdivision on 20 acres in Idaho. For this example, the SWPPP was prepared in November 2005
with construction commencing in May 2006. To illustrate how an actual SWPPP should be used,
this example SWPPP includes marked-up edits to pages and copies of records such as inspection
reports. For purposes of this example, this SWPPP was copied on August 15, 2006. Therefore,
inspection reports and other records are current as of that date.
This example SWPPP was developed for EPA's 2003 Construction General Permit (CGP), as
modified effective January 21, 2005. If you are subject to a different general permit issued by a
state or EPA Region, your requirements and SWPPP template might be slightly different.
Disclaimer
This SWPPP is for a hypothetical project. Any similarities to actual construction projects,
operators, or places are purely coincidental.
Do not copy this SWPPP for your project! The best management practices and explanatory text
in this SWPPP are intended to apply only to this hypothetical site. Each SWPPP must be created
on a case-by-case basis to address the unique conditions and issues at a given construction site.
Relying on the wording in this hypothetical SWPPP is discouraged and will not necessarily result
in compliance with the Construction General Permit.
EPA 833-07-003 September 2007
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
Stormwater Pollution Prevention Plan
for:
Clover Hills Subdivision
2202 Williams Avenue
Stormville, ID 83341
(208) 444-4444
Operator(s):
RBI Development, LLC
Mr. Doug Lewis
13 South Avenue
Boise, ID 83701
(208) 555-5555
Dlewis@rbi.com
SWPPP Contact(s):
Ms. Dorothy Williams
RBI Development, LLC
13 South Avenue
Boise, ID 83701
(208)555-555
Dwilliams@rbi.com
SWPPP Preparation Date:
11/01/2005
Estimated Project Dates:
Project Start Date: 05/05/2006
Project Completion Date: 10/01/2008
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Operator:
Coastal Creek Building, Inc.
Mr. Darren Shaw, Owner
445 Hunter Road
Bend, OR 97701
(503) 222-2222
darren.shaw@coastbuild.com
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
Contents
SECTION 1: SITE EVALUATION, ASSESSMENT, AND PLANNING 1
1.1 Project/Site Information 1
1.2 Contact Information/Responsible Parties 2
1.3 Nature and Sequence of Construction Activity 5
1.4 Soils, Slopes, Vegetation, and Current Drainage Patterns 7
1.5 Construction Site Estimates 8
1.6 Receiving Waters 8
1.7 Site Features and Sensitive Areas to be Protected 10
1.8 Potential Sources of Pollution 10
1.9 Endangered Species Certification 12
1.10 Historic Preservation 13
1.11 Applicable Federal, Tribal, State or Local Programs 14
1.12 Maps 14
SECTION 2: EROSION AND SEDIMENT CONTROL BMPS 15
2.1 Minimize Disturbed Area and Protect Natural Features and Soil 16
2.2 Phase Construction Activity 17
2.3 Control Stormwater Flowing onto and through the Project 18
2.4 Stabilize Soils 21
2.5 Protect Slopes 23
2.6 Protect Storm Drain Inlets 25
2.7 Establish Perimeter Controls and Sediment Barriers 28
2.8 Retain Sediment On-Site 32
2.9 Establish Stabilized Construction Exits 34
2.10 Additional BMPs 37
SECTION 3: GOOD HOUSEKEEPING BMPS 38
3.1 Material Handling and Waste Management 38
3.2 Establish Proper Building Material Staging Areas 40
3.3 Designate Washout Areas 41
3.4 Establish Proper Equipment/Vehicle Fueling and Maintenance Practices 43
3.5 Control Equipment/Vehicle Washing 44
3.6 Spill Prevention and Control 44
3.7 Any Additional BMPs 45
3.8 Allowable Non-Stormwater Discharge Management 46
SECTION 4: SELECTING POST-CONSTRUCTION BMPs 48
SECTION 5: INSPECTIONS 50
5.1 Inspections 50
5.2 Delegation of Authority 52
5.3 Corrective Action Log 52
SECTION 6: RECORDKEEPING AND TRAINING 53
6.1 Recordkeeping 53
6.2 Log of Changes to the SWPPP 53
6.3 Training 54
SECTION 7: FINAL STABILIZATION 55
RBI Development, LLC
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
SECTION 8: CERTIFICATION AND NOTIFICATION 57
SWPPP APPENDICES 58
Appendix A - General Location Map
Appendix B - Site Maps
Appendix C - Construction General Permit
Appendix D - NOI and Acknowledgement Letter from EPA/State
Appendix E - Inspection Reports
Appendix F - Corrective Action Log (or in Part 5.3)
Appendix G - SWPPP Amendment Log (or in Part 6.2)
Appendix H - Subcontractor Certifications/Agreements
Appendix I - Grading and Stabilization Activities Log (or in Part 6.1)
Appendix J - Training Log
Appendix K - Delegation of Authority
Appendix L-Additional Information (i.e, Endangered Species and Historic Preservation Documentation)
Tables
Table 1. Timeline of Activity 5
Table 2. Potential construction site pollutants 11
Figures
Figure 1. Earth dike 19
Figure 2. Vegetated swale 20
Figure 3. Erosion control blanket 24
Figure 4. Silt fence storm drain inlet protection 26
Figure 5. Gravel bag barriers 27
Figure 6. Silt fence 29
Figure/. Fiber rolls 31
Figures. Sediment basin 33
Figure 9. Stabilized construction exit 35
Figure 10. Stabilized construction exit (individual lot) 36
Figure 11. Temporary concrete washout 43
RBI Development, LLC
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
SECTION 1; SITE EVALUATION, ASSESSMENT, AND PLANNING
1.1 Project/Site Information
Instructions;
— In this section, you can gather some basic site information that will be helpful to you later when you file for
permit coverage.
— For more information, see Developing Your Stormwater Pollution Prevention Plan: A SWPPP Guide for
Construction Sites (also known as the SWPPP Guide), Chapter 2
- Detailed information on determining your site's latitude and longitude can be found at
www.epa.gov/npdes/stormwater/latlong
Project/Site Name: Clover Hills Subdivision
Project Street/Location: 2202 Williams Avenue
City: Stormville State: ID ZIP Code: 83341
County or Similar Subdivision: Twin Falls County
Latitude/Longitude (Use one of three possible formats, and specify method)
Latitude: Longitude:
1. 42 ° 33 ' 48 " N (degrees, minutes, seconds) 1. 114 ° 25 ' 30 " W (degrees, minutes, seconds)
2. ° . 'N (degrees, minutes, decimal) 2. ° . 'W (degrees, minutes, decimal)
3. __. °N (decimal) 3. _ _ . °W (decimal)
Method for determining latitude/longitude:
13 USGS topographic map (specify scale: 1:24.000 ) D EPA Web site D GPS
I I Other (please specify):
Is the project located in Indian country? Q Yes J3 No
If yes, name of Reservation, or if not part of a Reservation, indicate "not applicable."
Not Applicable
Is this project considered a federal facility? I I Yes [X| No
NPDES project or permit tracking number*: '
*(This is the unique identifying number assigned to your project by your permitting authority after you have applied
for coverage under the appropriate National Pollutant Discharge Elimination System (NPDES) construction general
permit.)
RBI Development, LLC
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
1.2 Contact Information/Responsible Parties
Instructions:
- List the operators), project managers, stormwater contact®, and person or organization that prepared the
SWPPP. Indicate respective responsibilities, where appropriate.
- Also, list subcontractors expected to work on-site. Notify subcontractors of stormwater requirements
applicable to their work.
- See SWPPP Guide, Chapter 2.B and EPA's Construction General Permit (CGP) Part 3, Subparts 3.2,
3.3.A, and 3.4.A.
Operator(s):
See Appendix B - Ownership Site Map for geographic area of control.
OPERATOR
Contact Information
RBI Development, LLC
Mr. Doug Lewis, Owner
13 South Avenue
Boise, ID 83701
Office Phone: (208) 555-5555
Email: Dlewis@rbi.com
Geographic Area of Control*
RBI Development owns the 20-acre parcel of land and is
developing the Clover Hills Subdivision. RBI
Development is the initial permittee applying for permit
coverage and will be primarily responsible for
developing and implementing this SWPPP. RBI
Development is responsible for overall site development
of lots A1-C10 including grading and infrastructure of
these lots but only constructing houses on lots A2-A16.
RBI Development will implement and maintain the best
management practices (BMPs) specified in Sections 2
and 3, conduct inspections (Section 5) and address
stormwater over the entire site including all areas
disturbed by construction activities, areas used for
materials storage, discharge points, and construction
exits. RBI Development has entered into contract to sell
lots B1-B9 to Falls Homes and lots C1-C10 to Coastal
Creek Building for individual housing construction. RBI
Development will also assume responsibility of
inspecting lots C1-C10 for Coastal Creek Building. Lots
B1-B9 will be covered under a separate SWPPP
developed by Fall Homes and will not be covered by this
SWPPP after these lots are sold to Fall Homes.
* See Construction Operator's Cooperative Agreement
RBI Development, LLC
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See Appendix B - Ownership Site Map for geographic area of control.
OPERATOR
Contact Information
Geographic Area of Control*
Coastal Creek Building, Inc.
Mr. Darren Shaw, Owner
445 Hunter Road
Bend, OR 97701
(503) 222-2222
darren.shawt@coastbuild.com
Coastal Creek Building has entered into a contract with
RBI Development to purchase lots C1-C10 and
commence building on lots C1-C5. Coastal Creek
Building will apply for permit coverage concurrent with
RBI Development, Coastal Creek Building has agreed to
implement this SWPPP in cooperation with RBI
Development. Coastal Creek Building will implement
and maintain BMPs for individual lots specified in
Sections 2 and 3 of this SWPPP and RBI Development
will conduct inspections on lots C1-C10 in compliance
with this SWPPP. Inspection reports and records will be
provided to Coastal Creek Building by RBI
Development.
See Construction Operator's Cooperative Agreement^
Project Manager(s):
Mr. Tony Groff, Project Manager
Coastal Creek Building, Inc.
445 Hunter Road
Bend, OR 97701
(503) 222-2222
tony.groff@coastbuild.com
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£>
Construction Operators* Cooperative Agreement
This cooperative agreement describes stormwater responsibilities for all construction
operators working on the Clover Hills subdivision project. The operators below agree to
abide by the following conditions throughout the duration of the construction project,
effective the date of signature. These conditions apply to all operators on the site,
regardless of whether an operator develops its own Storm Water Pollution Prevention
Plan (SWPPP) or agrees to be covered under the one created by RBI Development,
This project is subject to EPA's NPDES General Permit for Storm Water Discharges
from Construction Activities (Construction General Permit or CGP). The goal of this
permit is to prevent the discharge of pollutants associated with construction activity from
entering the storm drain system or surface waters. RBI Development, Inc. (RBI) has
developed a SWPPP for the Clover Hills Subdivision project, and it is available for
review at the on-site construction trailer.
RBI Development, Inc.'s Responsibilities:
* RBI will maintain the SWPPP documentation and will conduct and document self-
inspections required under Part 3.10 of the CGP on a weekly basis and within 24
hours of the end of a storm event of one-half inch or greater in all areas of the site
covered by this SWPPP.
• RBI will provide copies of inspection reports to the other operators covered by this
SWPPP within 24 hours following each inspection.
• RBI will be responsible for maintaining the cleanliness of the streets (Johnson Loop
and Williams Avenue) and storm drain inlet protection Best Management Practices
(BMPs) throughout the construction project. RBI will conduct street sweeping on a
weekly basis and prior to forecasted rain events. RBI will also inspect and replace
storm drain inlet protection BMPs as necessary.
» RBI will hold biweekly meetings to update operators on CGP compliance issues.
• RBI will maintain erosion and sediment control BMPs in all areas of the site under its
day-to-day control.
» RBI will provide adequate designated concrete washout areas to all operators
throughout the construction project and will be responsible for proper disposal of the
concrete, mortar or grout collected there.
Homebuilders' Responsibilities:
* Costs incurred by RBI to address excess sediment discharges, debris or spills on
roadways that result from an operator or subcontractor's negligence will be
reimbursed by the responsible operator.
• If the operator or its subcontractor damages a storm drain inlet BMP, the operator will
pay RBI $200.00 for each inlet BMP that must be replaced.
• Operator shall not store erodible or hazardous materials on any roadway.
• Operator shall be responsible for maintaining compliance with the applicable
SWPPP, including installation of erosion and sediment controls, within the individual
lots under its day-to-day control. Any BMP changes that would trigger the need for a
SWPPP modification shall be promptly communicated to RBI.
« Operator shall use the designated concrete washout area(s) provided by RBI to
dispose of any excess concrete, mortar and grout.
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Construction Operators' Cooperative Agreement
Joint Responsibilities;
• Each operator shall file a Notice of Intent (NOI) to be covered by the Construction
General Permit before beginning construction at the project, and permit coverage will
be maintained throughout the project.
* No operator shall file a Notice of Termination (NOT) until all disturbed areas of the
site under its day-to-day control have been effectively stabilized with permanent
erosion controls that satisfy the final stabilization requirement in the CGP; the only
allowed exception is those areas that have been effectively stabilized with temporary
erosion controls and turned over to a private landowner,
• Operators will maintain a clean site. Trash and debris will be picked up and disposed
of properly by the end of each day.
• Each operator is responsible for advising employees and subcontractors working on
this project of the requirements in the CGP and applicable SWPPP. Particular
emphasis should be placed on ensuring that employees and subcontractors do not
damage BMPs and do not introduce pollutants into the storm drain system.
The undersigned agree to abide by the terms and conditions of this cooperative agreement
as described above.
RBI Development. Inc. 2>#-***a.-&«s**~** ^//vcii £ / LI
Operator Signgjlfre Title Date
IF In addition, I agree to comply with and be covered by RBI's SWPPP for this project,
n I agree to the terms above, but choose to develop my own SWPPP rather than sign
onto RBI's SWPPP for this project.
Operator Name Signature Title Date
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1/
See Appendix B - Ownership Site Map for geographic area of control.
CWE*ERAT(5R (Not covered tMer tkwSWPP^
Contact Information
Falls Homes, LLC
Mr. Drew Falls, Owner
2123 Commercial Way
Twin Falls, ID 83301
(208) 333-3333
Geographic Area of Control*
Falls Homes has entered into a contract with RBI
Development to purchase lots B1-B9 and commence
building on all purchased lots. (Falls Homes will
develop its own SWPPP for lots B1-B9 and will
obtain NPDES Stormwater Permit Coverage
separately from RBI Development.)
* See Construction Operator's Cooperative Agreement
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Construction Operators* Cooperative Agreement
This cooperative agreement describes stormwater responsibilities for all construction
operators working on the Clover Hills subdivision project. The operators below agree to
abide by the following conditions throughout the duration of the construction project,
effective the date of signature. These conditions apply to all operators on the site,
regardless of whether an operator develops its own Storm Water Pollution Prevention
Plan (SWPPP) or agrees to be covered under the one created by RBI Development.
This project is subject to EPA's NPDES General Permit for Storm Water Discharges
from Construction Activities (Construction General Permit or CGP), The goal of this
permit is to prevent the discharge of pollutants associated with construction activity from
entering the storm drain system or surface waters. RBI Development, Inc. (RBI) has
developed a SWPPP for the Clover Hills Subdivision project, and it is available for
review at the on-site construction trailer.
RBI Development, Inc.'s Responsibilities:
• RBI will maintain the SWPPP documentation and will conduct and document self-
inspections required under Part 3.10 of the CGP on a weekly basis and within 24
hours of the end of a storm event of one-half inch or greater in all areas of the site
covered by this SWPPP.
• RBI will provide copies of inspection reports to the other operators covered by this
SWPPP within 24 hours following each inspection.
» RBI will be responsible for maintaining the cleanliness of the streets (Johnson Loop
and Williams Avenue) and storm drain inlet protection Best Management Practices
(BMPs) throughout the construction project. RBI will conduct street sweeping on a
weekly basis and prior to forecasted rain events. RBI will also inspect and replace
storm drain inlet protection BMPs as necessary.
• RBI will hold biweekly meetings to update operators on CGP compliance issues,
* RBI will maintain erosion and sediment control BMPs in all areas of the site under its
day-to-day control.
• RBI will provide adequate designated concrete washout areas to all operators
throughout the construction project and will be responsible for proper disposal of the
concrete, mortar or grout collected there.
Homebuilders* Responsibilities;
« Costs incurred by RBI to address excess sediment discharges, debris or spills on
roadways that result from an operator or subcontractor's negligence will be
reimbursed by the responsible operator.
« If the operator or its subcontractor damages a storm drain inlet BMP, the operator will
pay RBI $200.00 for each inlet BMP that must be replaced.
« Operator shall not store erodible or hazardous materials on any roadway.
« Operator shall be responsible for maintaining compliance with the applicable
SWPPP, including installation of erosion and sediment controls, within the individual
lots under its day-to-day control. Any BMP changes that would trigger the need for a
SWPPP modification shall be promptly communicated to RBI.
» Operator shall use the designated concrete washout area(s) provided by RBI to
dispose of any excess concrete, mortar and grout.
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Construction Operators* Cooperative Agreement
Joint Responsibilities:
» Each operator shall file a Notice of Intent (NOI) to be covered by the Construction
General Permit before beginning construction at the project, and permit coverage will
be maintained throughout the project.
• No operator shall file a Notice of Termination (NOT) until all disturbed areas of the
site under its day-to-day control have been effectively stabilized with permanent
erosion controls that satisfy the final stabilization requirement in the CGP; the only
allowed exception is those areas that have been effectively stabilized with temporary
erosion controls and turned over to a private landowner,
• Operators will maintain a clean site. Trash and debris will be picked up and disposed
of properly by the end of each day.
• Each operator is responsible for advising employees and subcontractors working on
this project of the requirements in the CGP and applicable SWPPP. Particular
emphasis should be placed on ensuring that employees and subcontractors do not
damage BMPs and do not introduce pollutants into the storm drain system.
The undersigned agree to abide by the terms and conditions of this cooperative agreement
as described above.
RBI Development. Inc.
Operator Signature Title Date
D In addition, I agree to comply with and be covered by RBFs SWPPP for this project.
a I agree to the terms above, but choose to develop my own SWPPP rather than sign
onto RBFs SWPPP for this project.
jit. D^s^S e*— Ousrtt*- °t II I
Operator Name Signature Title Date
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
Project Manager(s) or Site Supervisor(s):
RBI Development, LLC
Mr. Tared Strong, Project Manager
13 South Avenue
Boise, ID 83701
Office Phone: (208) 555-5555
Site Phone: (208) 444-4444
Email: Jstrong@rbi.com
Mr. Strong is responsible for managing day-to-day site operations including overall site
development of lots A1-C10 and construction of houses on lots A2-A16.
SWPPP Contact(s):
RBI Development, LLC
Ms. Dorothy Williams, Compliance/Inspection Officer
13 South Avenue
Boise, ID 83701
Office Phone: (208) 555-5555
Site Phone: (208) 444-4444
Email: Dwilliams@rbi.com
Ms. Williams is the primary SWPPP contact and responsible for compliance at the site, except
lotsBl-B9.
This SWPPP was Prepared by:
RBI Development, LLC
Ms. Dorothy Williams, Compliance/Inspection Officer
13 South Avenue
Boise, ID 83701
Office Phone: (208) 555-5555
Site Phone: (208) 444-4444
Emergency 24-Hour Contact:
RBI Development, LLC
Ms. Dorothy Williams, Compliance/Inspection Officer
Site Phone: (208) 444-4444
Cellular Phone: (208) 111-2222
RBI Development, LLC
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
SUBCONTRACTOR^)
Contact Information
Mr. Carl Gooden, Owner
Super Sweeping
345 Liberty Avenue
Twin Falls, ID 83301
(208) 333-0987
Mrs. Julie Drake, Vice President
Drake Waste and Sanitary Services
56 Washington Road
Twin Falls, ID 83301
(208) 333-0044
Geographic Area of Control*
Super Sweeping has entered into a contract with RBI
Development to perform street sweeping for Williams
Avenue and Johnson Loop.
Drake Waste and Sanitary Services have entered into a
contract with RBI Development to deliver dumpsters and
sanitary facilities to the site. They will also be
responsible for dumpster and recycling waste pick up and
disposal of sanitary wastes from the temporary sanitary
facilities.
* See Appendix H - Subcontractor Certifications/Agreements
RBI Development, LLC
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SUBCONTRACTOR®
Contact Information
Mr. George Carl, Owner
Future Foundations, LLC
78 Toms Road
Twin Falls, ID 83301
(208) 333-7777
Mr. Greg Allen, Owner
Poll Plumbing Company
234 Dunn Way
Twin Falls, ID 83301
(208) 333-3333
Mr. Michael Molds, Owner
Molds Electric
6502 Capital Avenue
Twin Falls, ID 83301
(208) 333-0000
Geographic Area of Control*
Future Foundations has entered into a contract with RBI
Development and Coastal Creek Building to construct
home foundations on lots A2-A16 and C1-C5.
stonf^t&HH.HiT * f S-/IZ./00 $.$
Poll Plumbing Company has entered into a contract with
RBI Development and Coastal Creek Building to install
plumbing fixtures for individual housing lots.
Amt**0im,**7~ & 10 *//*/*(, Q.S
Molds Electric has entered into a contract with RBI
Development and Coastal Creek Building to install
electrical components for individual housing lots.
/4**1€A«t» ft***-! 7~ f* I/ •*•//&/*(* &£
* See Appendix H - Subcontractor Certifications/Agreements ^
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
1.3 Nature and Sequence of Construction Activity
Instructions:
Briefly describe the nature of the construction activity and approximate time frames (one or more
paragraphs, depending on the nature and complexity of the project).
For more information, see SWPPP Guide, Chapter 3.A. and EPA's CGP Part 3, Subparts 3.3.B.1 and 2,
and 3.4.A.
Describe the general scope of the work for the project, major phases of construction, etc:
RBI Development is planning to build a 20-acre residential subdivision at 2202 Williams
Avenue, Stormville, Twin Falls County, Idaho. The subdivision will consist of 34 residential
lots with paved road access. RBI Development is responsible for overall site development of
lots A1-C10 including grading and infrastructure of these lots but only constructing houses on
lots A2-A16. RBI Development has entered into contract to sell lots B1-B9 to Falls Homes
and lots C1-C10 to Coastal Creek Building. Construction of houses will be on lots A2-A16,
C1-C5 and B1-B9. Seven storm drain inlets, an earth dike, and a vegetated swale will be
installed to convey runoff to a sediment basin. Soil disturbing activities will include: clearing
and grubbing; installing stabilized construction exits; installing erosion and sediment controls;
grading; excavation for the sediment basin, storm drain inlets, utilities, building foundations;
construction of roads; and preparation for final seeding, mulching, and landscaping.
Linear Utility
What is the function of the construction activity?
^ Residential Q Commercial O Industrial Q Road Construction
O Other (please specify):
Estimated Project Start Date: 05/05/2006
Estimated Project Completion Date: 10/01/2008
Table 1. Timeline of Activity: RBI Development will follow the sequence of activities below for major
construction activities and BMP installation.
Estimated
Timeline of
Activity
Construction Activity and
BMP Descriptions
05/05/2006 -
05/20/2006
Before any grading activities begin
1. Install orange colored plastic mesh fencing and mark trees to be preserved
in areas identified on the site map as Preserve Existing Vegetation (Section
2, Part 2.1)
2. Install perimeter silt fences (Section 2, Part 2.7)
3. Construct stabilized construction exits for the site (Section 2, Part 2.9)
4. Begin clearing and grubbing, grading, and installation of access road for
sediment basin (Section 2, Part 2.8)
5. Construct sediment basin (Section 2, Part 2.8)
RBI Development, LLC
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
05/20/2006
06/30/2006
Site grading
1. Begin site clearing and grubbing operations (Section 2, Part 2.2)
2. Construct vegetated swale (Section 2, Part 2.3)
3. Begin overall site grading and topsoil stripping (Section 2, Parts 2.1 and
2.2)
4. Establish topsoil stockpiles (Section 2, Part 2.1)
5. Install silt fences around the stockpiles and temporarily stabilize the
stockpiles with erosion controls (Section 2, Part 2.1)
6. Disturbed areas where construction will cease for more than 14 days will
be stabilized with erosion controls (Section 2, Part 2.4)
06/30/2006
09/15/2006
Infrastructure (roads, utilities, etc.)
1. Construct earth dike along upper portion of the North Slope (Section 2,
Part 2.3)
2. Construct combined staging and materials storage area (Section 3, Part 3.2)
3. Establish hazardous materials storage area with the combined staging area
(Section 3, Part 3.1)
4. Install temporary sanitary facilities (Section 3, Part 3.1)
5. Install dumpsters for the site (Section 3, Part 3.1)
6. Install utilities, sanitary sewers, and water services
7. Prepare pavement subgrade and install gutters, curbs, storm drain inlets,
sewer manholes
8. Install silt fences at locations of all storm drain inlets on Johnson Loop
(Section 2, Part 2.6)
09/15/2006
08/01/2008
Home construction
1. Construct temporary concrete washout areas (Section 3, Part 3.3)
2. Begin individual lot grading, and installation of utilities for individual lots
3. Permanently stabilize individual lots where housing is not planned (Section
2, Part 2.4)
4. Install stabilized construction exits for individual lots (Section 2, Part 2.9)
5. Install perimeter fiber rolls for individual housing lots A2-A16 (Section 2,
Part 2.7)
6. Disturbed areas where construction will cease for more than 14 days will
be stabilized with erosion controls (Section 2, Part 2.4)
7. Begin construction of housing foundations and houses
08/01/2008
10/01/2008
Final stabilization
1. Remove BMPs from storm drain inlets and finalize pavement activities.
2. Remove temporary concrete washout areas and restore to original grade
(Section 2, Part 2.3)
3. Convert sediment basin to a permanent detention basin (Section 4)
4. Install storm drain inlet markers after pavement activities have been
finalized (Section 4)
5. Remove all temporary control BMPs and stabilize any areas disturbed by
there removal with erosion controls (Section 7)
6. Prepare final seeding and landscaping (Section 7)
7. Monitor stabilized areas until final stabilization is reached (Section 7)
RBI Development, LLC
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Timeline of Activity: Coastal Creek Building will follow the sequence of activities
below for major construction activities and BMP installation.
Estimated
Timeline of
Activity
Construction Acflyf ^
•'. BMPDeseripihp
09/15/2006
08/01/2008
Home construction
1. Begin individual lot grading, and installation of utilities for individual lots,
2. Permanently stabilize individual lots where housing is not planned.
(Section 2, Part 2.4)
3. Install stabilized construction exits for individual lots. (Section 2, Part 2.9)
4. Install perimeter fiber rolls for individual housing lots, (Section 2, Part 2,7)
5. Disturbed areas where construction will cease for more than 14 days will
be stabilized. (Section 2, Part 2.4)
6. Begin construction of housing foundations and houses. a
08/01/2008
10/01/2008
Final Stabilization
1. Remove all erosion control measures and stabilize any areas disturbed by
their removal with erosion controls,
2. Prepare final seeding and landscaping, (Section 7)
3. Monitor stabilized areas until final stabilization is reached. (Section 7)
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1.4 Soils, Slopes, Vegetation, and Current Drainage Patterns
Instructions:
- Describe the existing soil conditions at the construction site including soil types, slopes and slope lengths,
drainage patterns, and other topographic features that might affect erosion and sediment control.
- Also, note any historic site contamination evident from existing site features and known past usage of the
site.
— This information should also be included on your site maps (See SWPPP Guide, Chapter 3.C.).
- For more information, see SWPPP Guide, Chapter 3.A and EPA's CGP Part 3, Subpart 3.3.C.
Soil type(s):
The current soil type of the site consists of gravely fine sand loam soil with bedrock subsoil.
Slopes (describe current slopes and note any changes due to grading or fill activities):
The north side of the site slopes down to Utah Creek and will remain as an area of natural
vegetation and be protected during construction activities.
Drainage Patterns (describe current drainage patterns and note any changes due to grading or fill
activities):
• Existing site runoff flows north toward Utah Creek and south toward an unnamed tributary
of Utah Creek. (See Appendix B - Pre-Construction Site Map)
• After grading and installation of Stormwater conveyances, ninety percent of the site runoff
will be collected by storm drain inlets, an earth dike, and a vegetated swale, which will
convey the runoff to the sediment basin in the northeast corner of the site. Water will be
discharged from the sediment basin, through a riprap spillway and level spreader, and enter
a natural vegetated area before discharging to Utah Creek. The remaining ten percent of
site runoff will flow south and southwest to natural vegetated areas before discharging to
an unnamed tributary of Utah Creek. (See Appendix B - Site Map)
Vegetation:
The site supports blocks of old growth trees (conifers) and undergrowth vegetation.
Interspersed throughout the blocks of old-growth trees are open pasture lands. The open
pasture lands are dominated by pasture grasses consisting of wheatgrass.
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Stormwater Pollution Prevention Plan (SWPPP)
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1.5 Construction Site Estimates
Instructions:
- Estimate the area to be disturbed by excavation, grading, or other construction activities, including
dedicated off-site borrow and fill areas.
- Calculate the percentage of impervious surface area before and after construction
— Calculate the runoff coefficients before and after construction.
- For more information, see SWPPP Guide, Chapter 3.A and EPA's CGP Part 3, Subpart 3.3.B.
The following are estimates of the construction site:
Total project area: 20 acres
Construction site area to be disturbed: 18.5 acres
Percentage impervious area before construction: 10 %
Runoff coefficient before construction: .07
Percentage impervious area after construction: 40 %
Runoff coefficient after construction: .31
1.6 Receiving Waters
Instructions:
— List the waterbody(s) that would receive stormwater from your site, including streams, rivers, lakes, coastal
waters, and wetlands. Describe each as clearly as possible, such as Mill Creek, a tributary to the Potomac
River, and so on.
— Indicate the location of all waters, including wetlands, on the site map. For more information, see EPA's
CGP Part 3, Subparts 3.3.B.4 and 3.3.C.6.
— Note any stream crossings, if applicable.
- List the storm sewer system or drainage system that stormwater from your site could discharge to and the
waterbody(s) that it ultimately discharges to.
— If any of the waterbodies above are impaired and/or subject to Total Maximum Daily Loads (TMDLs),
please list the pollutants causing the impairment and any specific requirements in the TMDL(s) that are
applicable to construction sites. Your SWPPP should specifically include measures to prevent the
discharge of these pollutants. For more information, see EPA's CGP Part 1, Subpart 1.3.C.5 and Part 3,
Subpart 3.14.
— For more information, see SWPPP Guide, Chapter 3.A and 3.B.
- Also, for more information and a list of TMDL contacts and links by state, visit
www.epa.gov/npdes/stormwater/tmdl.
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Stormwater Pollution Prevention Plan (SWPPP)
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Description of receiving waters:
Utah Creek has a reach of 43 miles running east to west through the Utah Valley and empties
into the Pine River. Utah Creek is designated for the following uses under Idaho's Water
Quality Standards (IDAPA 58.01.02): Secondary Contact Recreation, Agricultural Water
Supply, and Wildlife Habitat. The unnamed tributary to Utah Creek has a reach of 11 miles and
flows east to west and empties into Utah Creek 3 miles northwest of the construction site.
Flows for the unnamed tributary vary during the wet and dry seasons.
Description of storm sewer systems:
The storm sewer system will be contained within the subdivision, and site runoff will be
collected by storm drain inlets, an earth dike, and a vegetated swale, which will convey the
runoff to the sediment basin in the northeast corner of the site. Water will then be discharged
from the sediment basin, through a riprap spillway and level spreader and enter a natural
vegetated area before discharging to Utah Creek. The earth dike and vegetated swale will
remain as permanent Stormwater management structures after construction activities are
completed. The sediment basin will be converted to a permanent detention basin during the
final stabilization phase of construction and function as a Stormwater management structure.
Description of impaired waters or waters subject to TMDLs:
RBI Development conducted a review of Utah Creek and the unnamed tributary to determine if
the waters were impaired or subject to TMDLs. RBI first reviewed the 1998 303(d) list for the
state of Idaho available at
http://www.deq.state.id.us/water/data reports/surface water/monitoring/I998 303d list chap2
_entire.pdf (accessed 10/17/05). RBI did not identify Utah Creek or the unnamed tributary as
impaired waters or subject to TMDLs.
To verify that Utah Creek and the unnamed tributary are not impaired waters or subject to
TMDLs, RBI contacted Balthasar Buhidar with the Department of Environmental Quality,
Twin Falls Regional Office. RBI described the project location and receiving waters during the
conversation on 10/18/2005 (See Appendix L - Telephone Log #2). Mr. Buhidar verified
during the telephone call that Utah Creek and the unnamed tributary are not impaired waters or
subject to TMDLs.
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Stormwater Pollution Prevention Plan (SWPPP)
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1.7 Site Features and Sensitive Areas to be Protected
Instructions:
- Describe unique site features including streams, stream buffers, wetlands, specimen trees, natural
vegetation, steep slopes, or highly erodible soils that are to be preserved.
- Describe measures to protect these features.
— Include these features and areas on your site maps.
- For more information, see SWPPP Guide, Chapter 3.A and 3.B.
Description of unique features that are to be preserved:
Existing vegetation consisting of old-growth trees (conifers) and undergrowth vegetation,
surrounding the proposed project area will be preserved during site construction. A portion of
the construction will disturb a small portion of the existing vegetation to install the riprap
spillway and level spreader for the sediment basin.
Describe measures to protect these features:
The existing vegetation will be protected during construction activities as described in Section
2, Part 2.1.
1.8 Potential Sources of Pollution
Instructions:
- Identify and list all potential sources of sediment, which may reasonably be expected to affect the quality of
stormwater discharges from the construction site.
— Identify and list all potential sources of pollution, other than sediment, which may reasonably be expected
to affect the quality of stormwater discharges from the construction site.
- For more information, see SWPPP Guide, Chapter 3.A and EPA's CGP Part 3, Subpart 3.1 .B.
Potential sources of sediment to stormwater runoff:
• Clearing and grubbing operations
• Grading and site excavation operations
• Vehicle tracking
• Topsoil stripping and stockpiling
• Landscaping operations
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Stormwater Pollution Prevention Plan (SWPPP)
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Potential pollutants and sources, other than sediment, to Stormwater runoff:
• Combined Staging Area—small fueling activities, minor equipment maintenance,
sanitary facilities, and hazardous waste storage.
• Materials Storage Area—general building materials, solvents, adhesives, paving
materials, paints, aggregates, trash, etc.
• Construction Activity—paving, curb/gutter installation, concrete pouring/mortar/stucco,
and building construction
• Concrete Washout Area
For all potential construction site pollutants, see Table 2 below.
Table 2. Potential construction site pollutants
Material/Chemical
Pesticides (insecticides,
fungicides, herbicides,
rodenticides)
Fertilizer
Plaster
Cleaning solvents
Asphalt
Concrete
Glue, adhesives
Paints
Curing compounds
Wood preservatives
Hydraulic oil/fluids
Gasoline
Diesel Fuel
Kerosene
Physical Description
Various colored to
colorless liquid,
powder, pellets, or
grains
Liquid or solid grains
White granules or
powder
Colorless, blue, or
yellow-green liquid
Black solid
White solid/grey liquid
White or yellow liquid
Various colored liquid
Creamy white liquid
Clear amber or dark
brown liquid
Brown oily petroleum
hydrocarbon
Colorless, pale brown
or pink petroleum
hydrocarbon
Clear, blue-green to
yellow liquid
Pale yellow liquid
petroleum hydrocarbon
Stormwater Pollutants
Chlorinated hydrocarbons,
organophosphates,
carbamates, arsenic
Nitrogen, phosphorous
Calcium sulphate, calcium
carbonate, sulfuric acid
Perchloroethylene,
methylene chloride,
trichloroethylene, petroleum
distillates
Oil, petroleum distillates
Limestone, sand, pH,
chromium
Polymers, epoxies
Metal oxides, stoddard
solvent, talc, calcium
carbonate, arsenic
Naphtha
Stoddard solvent, petroleum
distillates, arsenic, copper,
chromium
Mineral oil
Benzene, ethyl benzene,
toluene, xylene, MTBE
Petroleum distillate, oil &
grease, naphthalene, xylenes
Coal oil, petroleum
distillates
Location*
Herbicides used for noxious
weed control
Newly seeded areas
Home construction
No equipment cleaning
allowed in project limits
Streets and roofing
Curb and gutter, building
construction
Home construction
Home construction
Curb and gutter
Timber pads and Home
construction
Leaks or broken hoses from
equipment
Secondary
containment/staging area
Secondary
containment/staging area
Secondary
containment/staging area
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Material/Chemical
Antifreeze/coolant
Sanitary toilets
Physical Description
Clear green/yellow
liquid
Various colored liquid
Stormwater Pollutants
Ethylene glycol, propylene
glycol, heavy metals
(copper, lead, zinc)
Bacteria, parasites, and
viruses
Location*
Leaks or broken hoses from
equipment
Staging area
*(Area where material/chemical is used on-site)
1.9 Endangered Species Certification
Instructions:
— Before beginning construction, determine whether endangered or threatened species or their critical
habitats are on or near your site.
- Adapt this section as needed for state or tribal endangered species requirements and, if applicable,
document any measures deemed necessary to protect endangered or threatened species or their critical
habitats.
- For more information on this topic, see SWPPP Guide, Chapter 3.B and EPA's CGP Part 1, Subpart
1.3.C.6 and Appendix C.
— Additional information on Endangered Species Act (ESA) provisions for EPA's Construction General
Permit is at www.epa.gov/npdes/stormwater/esa
Are endangered or threatened species and critical habitats on or near the project area?
D Yes E3 No
Describe how this determination was made:
Ms. Williams conducted a review of any potential endangered/threatened species and critical
habitat on or near the Clover Hills Subdivision project in Twin Falls County, Idaho. RBI first
reviewed the Endangered Species Act (ESA) review procedures and endangered species list for
Idaho available at http://cfpub.epa.gov/npdes/stormwater/esa.cfm (accessed on 10/15/05). RBI
did not identify any endangered species in the project area.
Ms. Williams then reviewed information available from the Idaho Governor's Office of
Species Conservation at http://species.idaho.gov/index.html (accessed on 10/16/05). To verify
that there were no endangered species within the project area; Ms. Williams contacted Nate
Fisher with the Office of Species Conservation on 10/17/05 (See Appendix L - Telephone Log
#1). Ms. Williams described the location of the construction project and the closest receiving
waters (Utah Creek and the unnamed tributary to Utah Creek). Mr. Fisher verified in the
telephone call that there were no endangered/threatened species or critical habitats in the
immediate project area.
Because no endangered or threatened species or their critical habitats were found during the
screening process, Criterion A will be reported on the NOI form.
If yes, describe the species and/or critical habitat:
N/A
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If yes, describe or refer to documentation that determines the likelihood of an impact on
identified species and/or habitat and the steps taken to address that impact. (Note, if species are
on or near your project site, EPA strongly recommends that the site operator work closely with
the appropriate field office of the U.S. Fish and Wildlife Service or National Marine Fisheries
Service. For concerns related to state or tribal listing of species, please contact a state or tribal
official.)
N/A
1.10 Historic Preservation
Instructions:
Before you begin construction, you should review federal and any applicable state, local, or tribal historic
preservation laws and determine if there are historic sites on or near your project. If so, you might need to
make adjustments to your construction plans or to your stormwater controls to ensure that these historic
sites are not damaged.
For more information, see SWPPP Guide, Chapter 3.B or contact your state or tribal historic preservation
officer.
Are there any historic sites on or near the construction site?
D Yes Kl No
Describe how this determination was made:
Ms. Williams reviewed the Idaho State Register of Historic Places available from the Idaho
State Preservation Office at http://www.idahohistory.net/shpo (accessed on 10/17/05) and the
National Register Information System available from the National Park Service at
http://www.nr.nps.gov/ (accessed on 10/17/05) to determine if any historic sites are on or near
the Clover Hills Subdivision. No historic sites were identified from the review.
To verify that there were no historic sites on or near the project area, Ms. Williams contacted
Janet Gallimore, State Historic Preservation Officer, of the Idaho State Preservation Office on
10/17/05 (See Appendix L - Telephone Log #3). Ms. Williams described the location of the
project, and Mrs. Gallimore verified in the telephone call that there were no historic sites on or
near the project area.
If yes, describe or refer to documentation that determines the likelihood of an impact on this
historic site and the steps taken to address that impact.
N/A
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1.11 Applicable Federal, Tribal, State or Local Programs
Instructions:
- Note other applicable federal, tribal, state or local soil and erosion control and stormwater management
requirements that apply to the construction site. See EPA's CGP Part 3.9.
The Twin Falls County Stormwater Ordinance specifies design requirements for the sediment
basin and stabilized construction exits for residential lots.
• The Twin Falls County's stormwater ordinance (Ch. 10.3) requires the design volume of
the sediment basin be based on the following calculation:
Design Volume = 3,600 cubic feet x Area
Design Volume = (3,600 cu ft/acre) x 20 acres = 72,000 cubic feet
• The Twin Falls County's stormwater ordinance (Ch. 20.1) specifies that stabilized
construction exits for residential lots will have a minimum length of 30 feet.
1.12 Maps
Instructions:
— Attach site maps. For most projects, a series of site maps is recommended. The first should show the
undeveloped site and its current features. An additional map or maps should be created to show the
developed site or for more complicated sites show the major phases of development.
These maps should include the following:
— Direction(s) of stormwater flow and approximate slopes before and after major grading activities;
— Areas and timing of soil disturbance;
- Areas that will not be disturbed;
— Natural features to be preserved;
- Locations of major structural and non-structural BMPs identified in the SWPPP;
— Locations and timing of stabilization measures;
- Locations of off-site material, waste, borrow, or equipment storage areas;
— Locations of all waters, including wetlands;
— Locations where stormwater discharges to a surface water;
- Locations of storm drain inlets; and
— Areas where final stabilization has been accomplished.
- For more information, see SWPPP Guide, Chapter 3.C and EPA's CGP Part 3, Subparts 3.1.B.1 and
3.3.C.
See Appendix B - Site Maps
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SECTION 2: EROSION AND SEDIMENT CONTROL BMPS
Instructions:
— Describe the BMPs that will be implemented to control pollutants in stormwater discharges. For each major
activity identified, do the following
•S Clearly describe appropriate control measures.
S Describe the general sequence during the construction process in which the measures will be
implemented.
•S Describe the maintenance and inspection procedures that will be used for that specific BMP.
S Include protocols, thresholds, and schedules for cleaning, repairing, or replacing damaged or failing
BMPs.
•S Identify staff responsible for maintaining BMPs.
S (If your SWPPP is shared by multiple operators, indicate the operator responsible for each BMP.)
— Categorize each BMP under one of the following 10 areas of BMP activity as described below:
2.1 Minimize disturbed area and protect natural features and soil
2.2 Phase Construction Activity
2.3 Control Stormwater flowing onto and through the project
2.4 Stabilize Soils
2.5 Protect Slopes
2.6 Protect Storm Drain Inlets
2.7 Establish Perimeter Controls and Sediment Barriers
2.8 Retain Sediment On-Site and Control Dewatering Practices
2.9 Establish Stabilized Construction Exits
2.10 Any Additional BMPs
- Note the location of each BMP on your site map(s).
- For any structural BMPs, you should provide design specifications and details and refer to them. Attach
them as appendices to the SWPPP or within the text of the SWPPP.
- For more information, see SWPPP Guide, Chapter 4 and EPA's CGP Part 3, Subparts 3.3. B.2 and 3.4.A-
D, and Part 4, Subpart 4.5.
— Consult your state's design manual or one of those listed in Appendix D of the SWPPP Guide.
- For more information or ideas on BMPs, see EPA's National Menu of BMPs
http://www.epa.gov/npdes/stormwater/menuofbmps
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2.1 Minimize Disturbed Area and Protect Natural Features and
Soil
Instructions:
Describe the areas that will be disturbed with each phase of construction and the methods (e.g., signs,
fences) that you will use to protect those areas that should not be disturbed. Describe natural features
identified earlier and how each will be protected during construction activity. Also describe how topsoil will
be preserved. Include these areas and associated BMPs on your site map(s) also. (For more information,
see SWPPP Guide, Chapter 4, ESC Principle 1.)
Also, see EPA's Preserving Natural Vegetation BMP Fact Sheet at
www.epa.gov/npdes/stormwater/menuofbmps/construction/perserve veg
Existing Vegetation
BMP Description: The preserved area of existing vegetation, as identified on the site map, will
be surrounded by a temporary orange colored plastic mesh fence and all trees on the perimeter of
the protected area will be marked with a brightly colored ribbon. The fencing will be at least 3
feet tall and have openings not larger than 2 inches by 2 inches. Support posts for the temporary
fence will be a minimum of 4.5 feet and driven a minimum of 18 to 20 inches in the ground.
Posts will be spaced a maximum of 6 feet apart. The temporary fencing will be installed at the
drip/spread line of the trees and undergrowth vegetation to be protected. Vehicles and equipment
will be kept away from the protected area.
Installation Schedule:
The preserved area of existing vegetation will be surrounded with
the orange-colored plastic mesh fence, and trees will be marked
before construction begins at the site.
Maintenance and
Inspection:
The area will be inspected weekly to ensure the temporary fence
is intact and the trees are clearly marked. During construction,
preserved areas of existing vegetation will be surrounded by the
orange-colored mesh fence and clearly marked at all times.
Responsible Staff:
RBI Development
Topsoil
BMP Description: Topsoil stripped from the immediate construction area will be stockpiled as
identified on the site map (See Appendix B). The stockpiles will be in areas that will not interfere
with construction phases and at least 15 feet away from areas of concentrated flows or pavement.
The slopes of the stockpile will be roughened by equipment tracking and will not exceed 2:1 to
prevent erosion. A silt fence will be installed around the perimeter of each stockpile, in
accordance with the silt fence design specifications in Section 2, Part 2.7. Stockpiles will also be
temporarily stabilized with erosion controls as described in Section 2, Part 2.4.
Installation Schedule:
Topsoil stockpiles will be established during grading activities.
The silt fence and temporary erosion controls will be installed
immediately after the stockpile has been established.
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Maintenance and
Inspection.
The area will be inspected weekly for erosion and immediately
after storm events. Areas on or around the stockpile that have
eroded will be stabilized immediately with erosion controls.
Maintenance and inspection procedures for the silt fence are
described in Section 2, Part 2.7.
Responsible Staff.
RBI Development
2.2 Phase Construction Activity
Instructions:
Describe the intended construction sequencing and timing of major activities, including any opportunities
for phasing grading and stabilization activities to minimize the overall amount of disturbed soil that will be
subject to potential erosion at one time. Also, describe opportunities for timing grading and stabilization so
that all or a majority of the soil disturbance occurs during a time of year with less erosion potential (i.e.,
during the dry or less windy season). (For more information, see SWPPP Guide, Chapter 4, ESC Principle
2.) It might be useful to develop a separate, detailed site map for each phase of construction.
Also, see EPA's Construction Sequencing BMP Fact Sheet at
http://www.epa.gov/npdes/stormwater/menuofbmps/construction/cons seq)
BMP Description Because of the relatively small project area (20 acres) and the need to grade
and install roads before building construction begins, it is not practical to perform phased
grading at this site. To minimize potential erosion, only areas necessary to construct the
construction exits, access road for the sediment basin and the sediment basin will be disturbed
initially. These areas will be cleared, grubbed, and graded and the construction exits, access road
and sediment basin will be installed. These areas will be stabilized with erosion controls
immediately after construction but no later than 14 days after construction. Overall grubbing,
clearing, and grading is planned to occur in late May and June during a time of the year with less
rainfall to limit erosion from the site. Areas disturbed during this period will be stabilized with
hydromulch or other erosion controls immediately after construction but no later than 14 days
after construction ceases (see Section 2, Part 2.4).
Installation Schedule:
For a timeline of construction activity, see Section 1.3.
Responsible Staff:
RBI Development
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2.3 Control Stormwater Flowing onto and through the Project
Instructions:
— Describe structural practices (e.g., diversions, berms, ditches, storage basins) including design
specifications and details used to divert flows from exposed soils, retain or detain flows, or otherwise limit
runoff and the discharge of pollutants from exposed areas of the site. (For more information, see SWPPP
Guide, Chapter 4, ESC Principle 3.)
Earth Dike
BMP Description: A permanent earth dike will be constructed horizontally along the uphill
perimeter of the northern slope, as detailed on the site map, to convey Stormwater to the sediment
basin. The dike will be constructed of compacted soil and have a top width of 4 feet, a height of
2 feet and 2:1 side slopes. A stabilized channel (1 foot in depth and 3 feet wide) will be installed
at the bottom of the uphill side of the dike to convey runoff to the sediment basin. A riprap
spillway will be installed in the channel to dissipate water velocity before discharging to the
sediment basin. The dike will be permanently stabilized by hydroseeding and mulching to
prevent erosion and damage immediately after construction. The earth dike will remain as a
permanent Stormwater structure after construction is complete. For design specifications, see
Figure 1.
Installation Schedule:
The dike and channel will be installed before infrastructure
construction begins at the site.
Maintenance and
Inspection:
The dike will be inspected weekly and after storm events for
erosion damage and structural failures. The dike will be
maintained at its original height and repaired if the original height
decreases. If seeding and mulching fails or is washed away, the
dike will be reseeded and re-mulched. Any erosion damage or
structural failures will be repaired immediately. Accumulated
sediments will be removed from the channel when one-third of
the height of the channel is reached. Removed sediments will be
hauled off-site for disposal at Springfield Landfill.
Responsible Staff:
RBI Development
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2:1 SLOPE OR
2:1 SLOPE OR
FLATTER
GRADE LINE
CUT OR FILL
SLOPE
AS afayisau. ON
STEE? SLOPES EXCAVATE TO PROVIDE
RECUJRO3 FLOW WIDTH AT ROW DEPTH
QRWMGE-GJWJC
10
V V V V
CUT OR
FILL SLOPE
Figure 1. Earth dike
Y Y V
Design Specifications
1. The earth dike will be compacted by earth-moving equipment.
2. The earth dike will have positive drainage.
3. The earth dike will have a width of 4 feet, a height of 2 feet, and 2:1 side slopes.
4. A stabilized channel (1 foot in depth and 3 feet wide) will be installed at the uphill side of
the earth dike to convey runoff to the sediment basin.
Vegetated Swale
BMP Description: A vegetated swale will be installed between housing lots B1-B8 and B9-A16,
as detailed on the site map. The swale will convey runoff to a storm drain inlet, southwest of lot
A12. The swale will have side slopes (2:1), and the slopes and bottom of the swale will be
seeded, mulched, and stabilized using erosion control blankets to allow vegetation to be
established. Fiber roll check dams will be installed along the vegetated swale. The rolls will
consist of rolled tubes of erosion control blankets (8 inches in diameter) and bound at each end
with jute-type twine. The rolls will be placed along the swale in 6-foot intervals and staked into
the ground using wooden stakes (24 inches long) 3 feet apart. The vegetated swale will remain as
a permanent Stormwater structure after construction is complete. For design specifications, see
Figure 2.
Installation Schedule:
The vegetated swale will be installed after clearing and grubbing
operations are completed at the site.
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Maintenance and
Inspection:
Responsible Staff:
The swale will be inspected weekly and immediately after storm
events for erosion and structural failures. Before vegetation has
been established in the swale, inspect erosion control blankets,
embankments, and beds for erosion and accumulation of debris
and sediment. Remove debris, sediment, and repair erosion
control blankets, fiber rolls and embankments immediately.
RBI Development
ORIGINAL* CRAO£
a
Figure 2. Vegetated swale
Design Specifications
1. The swale will have side slopes of 2:1.
2. The channel will be lined with erosion control blankets.
3. Fiber roll check dams will be placed along the swale in 6-foot intervals.
4. The swale will have a positive drainage to convey runoff to the storm drain inlet.
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2.4 Stabilize Soils
Instructions:
Describe controls (e.g., interim seeding with native vegetation, hydroseeding) to stabilize exposed soils
where construction activities have temporarily or permanently ceased. Also describe measures to control
dust generation. Avoid using impervious surfaces for stabilization whenever possible. (For more
information, see SWPPP Guide, Chapter 4, ESC Principle 4, EPA's CGP Part 3, Subpart 3.13.D.)
Also, see EPA's Seeding BMP Fact Sheet at
www.epa.gov/npdes/stormwater/menuofbmps/construction/seedinq
Temporary Stabilization
BMP Description: Temporary vegetative cover will be established using hydroseeding for areas
of exposed soil (including stockpiles) where construction will cease for more than 14 days and
seeded surfaces. Hydroseeding will consist of wood fibers, seed (Smooth Brome), fertilizer, and
stabilizing emulsion and applied at a rate of 8 pounds per acre. Seeding will be conducted during
periods of the year when vegetation is more likely to be established.
Q Permanent [>| Temporary
Installation Schedule:
Temporary stabilization measures will be applied to portions of
the site where construction activities will temporarily cease for
more than 14 days.
Maintenance and
Inspection:
Stabilized areas will be inspected weekly and after storm events
until a dense cover of vegetation has become established. If
failure is noticed at the seeded area, the area will be reseeded,
fertilized, and mulched immediately.
Responsible Staff:
RBI Development
Mulching
BMP Description: Hydromulching will provide immediate protection to exposed soils during
short periods of construction. Hydromulch will also be applied in areas that have been seeded for
temporary or permanent stabilization. Straw mulch and wood fibers will be mixed with a
tackifier (amount specified per manufacturer's instructions) and applied uniformly by machine
with an application rate of 90-100 pounds (2-3 bales) per 1,000 square feet or 2 tons (100-200
bales) per acre. If the tackifier does not appear effective in anchoring the mulch to the disturbed
soil, crimping equipment will be used to provide additional binding to the soil. The mulch will
cover 75 to 90 percent of the ground surface.
Installation Schedule:
Hydromulch will be applied to exposed soils during short periods
of construction and seeded areas.
Maintenance and
Inspection:
Mulched areas will be inspected weekly and after storm events to
check for movement of mulch or erosion. If washout, breakage, or
erosion occurs, the surface will be repaired, and new mulch will
be applied to the damaged area.
Responsible Staff:
RBI Development
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
Permanent Stabilization
BMP Description: Permanent stabilization will be done immediately after the final design grades
are achieved but no later than 14 days after construction ceases. Native species of plants will be
used to establish vegetative cover on exposed soils. Permanent stabilization will be completed in
accordance with the final stabilization procedures in Section 7.
Permanent
Temporary
Installation Schedule:
Maintenance and
Inspection:
Responsible Staff:
Portions of the site where construction activities have
permanently ceased will be stabilized, as soon as possible but no
later than 14 days after construction ceases.
All seeded areas will be inspected weekly during construction
activities for failure and after storm events until a dense cover of
vegetation has been established. If failure is noticed at the seeded
area, the area will be reseeded, fertilized, and mulched
immediately. After construction is completed at the site,
permanently stabilized areas will be monitored until final
stabilization is reached.
RBI Development / ^O^ST-I-VC- c«c«^c. B^St^c^t*
Dust Control
BMP Description: Dust from the site will be controlled by using a mobile pressure-type
distributor truck to apply potable water to disturbed areas. The mobile unit will apply water at a
rate of 300 gallons per acre and minimized as necessary to prevent runoff and ponding.
Installation Schedule:
Maintenance and
Inspection:
Responsible Staff:
Dust control will be implemented as needed once site grading has
been initiated and during windy conditions (forecasted or actual
wind conditions of 20 mph or greater) while site grading is
occurring. Spraying of potable water will be performed no more
than three times a day during the months of May-September and
once per day during the months of October-April or whenever the
dryness of the soil warrants it.
At least one mobile unit will be available at all times to distribute
potable water to control dust on the project area. Each mobile unit
will be equipped with a positive shutoff valve to prevent over
watering of the disturbed area. For vehicle and equipment
maintenance practices, see Section 3, Part 3.4.
RBI Development
RBI Development, LLC
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
2.5 Protect Slopes
Instructions:
Describe controls (e.g., erosion control blankets, tackifiers) including design specifications and details that
will be implemented to protect all slopes. (For more information, see SWPPP Guide, Chapter 4, ESC
Principle 5.)
Also, see EPA's Geotextiles BMP Fact Sheet at
www.epa.gov/npdes/stormwater/menuofbmps/construction/geotextiles
Geotextile Erosion Control Blanket
BMP Description: Geotextile erosion control blankets will be used to provide stabilization for
the slopes in the vegetated swale and sediment basin. The blanket will cover the entire area of the
graded slope and bottom channel. The bottom and side slopes will be seeded and mulched before
the blanket is applied. The blanket will be installed by digging a small trench on the upside of the
slope, 12 inches wide by 6 inches deep, and stapling the leading edge of the blanket in the trench.
The blanket will be rolled down the slope slowly to maintain soil contact and stapled in 12-inch
intervals. If the blanket cannot cover the entire slope, the blankets will be overlapped (minimum
of 2 inches) and stapled at the overlapped edge. The erosion control blanket will always be
installed according to the manufacturer's instructions and specifications. For design
specifications, see Figure 3.
Installation Schedule:
The erosion control blankets will be installed once the slopes of
the vegetated swale and sediment basin have reached final grade.
Maintenance and
Inspection:
The erosion control blanket will be inspected weekly and
immediately after storm events to determine if cracks, tears, or
breaches have formed in the fabric; if so, the blanket will be
repaired or replaced immediately. Good contact with the soil will
be maintained and erosion will not occur under the blanket. Any
areas where the blanket is not in close contact with the ground
will be repaired or replaced.
Responsible Staff:
RBI Development
RBI Development, LLC
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
Figure 3. Erosion control blanket
Design Specifications
1. Slope surface will be free of rocks, clods, sticks and grass. The blankets will have good
soil contact.
2. Lay blankets loosely and staple to maintain direct contact with the soil. Do not stretch.
3. Install per manufacturer's recommendations.
RBI Development, LLC
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
2.6 Protect Storm Drain Inlets
Instructions:
Describe controls (e.g., inserts, rock-filled bags, or block and gravel) including design specifications and
details that will be implemented to protect all inlets receiving stormwater from the project during the entire
project. (For more information, see SWPPP Guide, Chapter 4, ESC Principle 6.)
Also, see EPA's Storm Drain Inlet Protection BMP Fact Sheet at
www.epa.gov/npdes/stormwater/menuofbmps/construction/storm drain
Storm Drain Inlet in the Vegetated Swale
BMP Description: Fiber rolls will be installed around the perimeter of the storm drain inlet (see
inset 1 site map). The rolls will consist of rolled tubes of erosion control blankets (8 inches in
diameter) and bound at each end with jute-type twine. The rolls will be installed in shallow
trenches dug 2-4 inches below ground surface and staked into the ground using wooden stake
(24 inches long) 3 to 4 feet apart. For design specifications of fiber rolls, see Section 2, Part 2.7.
Installation Schedule:
The fiber rolls and check dams will be installed once the swale
has erosion control blankets in place and has been stabilized.
Maintenance and
Inspection:
The fiber rolls will be inspected weekly and immediately after
storm events to replace or repair split, torn, unraveled or slumping
rolls. Accumulated sediment will be removed when accumulation
reaches one-third the height of the fiber roll. The removed
sediment will be hauled off-site and disposed of at Springfield
Landfill.
Responsible Staff:
RBI Development
Storm Drain Inlet Protection before Paving
BMP Description: A silt fence barrier will be constructed around all storm drain inlets except
the storm drain inlet in the vegetated swale. The silt fence barrier will be installed by excavating
a 12-inch-deep trench around the storm drain inlet. Wooden posts supporting the silt fence will
be spaced 2 to 3 feet apart and driven securely into the ground; a minimum of 18 to 20 inches
deep. The bottom edge of the silt fence will extend across the bottom of the trench and the trench
will be backfilled and compacted to prevent stormwater and sediment from discharging
underneath the silt fence. For design specifications, see Figure 4.
Installation Schedule:
Once the storm drain inlets have been installed on-site, the silt
fences will be immediately placed around the inlets. The sediment
fences surrounding the six storm drain inlets on the main road
will be removed and replaced with gravel bag barriers once the
pavement subgrade has been applied.
Maintenance and
Inspection:
Responsible Staff:
For maintenance and inspection procedures
Section 2, Part 2. 7.
for the silt fence, see
RBI Development
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
Figure 4. Silt fence storm drain inlet protection
Design Specifications
1. The silt fence will be constructed long enough to extend across the expected flow path.
2. The support posts will be a minimum of 4.5 feet and driven a minimum of 18 to 20
inches in the ground. Posts will be spaced a maximum of 6 feet apart. Fabric will be
securely fastened to posts with half-inch staples or 16-gauge wire ties spaced a maximum
of 6 inches.
3. A 12-inch trench will be excavated along the uphill side of the silt fence posts. The
bottom edge of the fabric will extend across the bottom of the trench. The trench will be
backfilled to 4 inches above ground and compacted to bury and secure the bottom of the
filter fabric
Storm Drain inlet protection after Road Paving
BMP Description: Gravel bag barriers made of woven geotextile fabric will be installed around
the six storm drain inlets on Johnson Loop. The barriers will be installed at minimum height of
two bags and maintain a spillway with a height of one bag. For design specifications, see Figure
5.
Installation Schedule:
The barriers will be installed around the six inlets along the road
once the pavement subgrade has been applied. The gravel bag
barriers will be removed before final pavement activities begin.
Maintenance and
Inspection:
Inspect all barriers weekly and immediately after storm events for
holes, tears, and snags. Check gravel bags for proper arrangement
and displacement. Remove accumulated sediment when it reaches
one-third the height of the barrier. Removed sediments will be
hauled off-site to Springfield Landfill. Make repairs immediately
to the fabric barrier if the barrier has been damaged. The
anticipated life span of the gravel bag barriers is 3 months and
will likely need to be replaced after this time span.
Responsible Staff:
RBI Development
RBI Development, LLC
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
-BACK OF SIDEWALK
5RAVEL FILLED SANDBAGS
ARE STACKED TIGHTL'1
Figure 5. Gravel bag barriers
PLAN VIEW
Design Specifications
1. Place gravel bag barriers around the storm drain inlets where water can pond and allow
sediment to separate from runoff.
2. Bags of woven geotextile fabric will be filled with gravel, layered, and packed tightly.
3. Leave one gravel bag gap in the top row to provide a spillway for overflow.
RBI Development, LLC
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
2.7 Establish Perimeter Controls and Sediment Barriers
Instructions:
Describe structural practices (e.g., silt fences or fiber rolls) including design specifications and details to
filter and trap sediment before it leaves the construction site. (For more information, see SWPPP Guide,
Chapter 4, ESC Principle 7.)
Also see, EPA's Silt Fence BMP Fact Sheet at
www.epa.gov/npdes/stormwater/menuofbmps/construction/silt fences or Fiber Rolls BMP Fact Sheet at
www.epa.gov/npdes/stormwater/menuofbmps/construction/fiber rolls
Silt Fence
BMP Description: Silt fences will be installed around the perimeter of the entire site, except at
the two construction entrances. A silt fence will also be installed around the topsoil stockpile.
Silt fences will be installed by excavating a 12-inch-deep trench along the line of proposed
installation. Wooden posts supporting the silt fence will be spaced 4 to 6 feet apart and driven
securely into the ground; a minimum of 18 to 20 inches deep. The silt fence will be fastened
securely to the wooden posts with wire ties spaced every 24 inches at the top, mid section, and
bottom of the wooden post. The bottom edge of the silt fence will extend across the bottom of
the trench and the trench will be backfilled and compacted to prevent stormwater and sediment
from discharging underneath the silt fence. For design specifications, see Figure 6.
Installation Schedule:
The silt fences will be installed before construction begins at the
site and around topsoil stockpiles once they have been
established.
Maintenance and
Inspection:
Silt fences will be inspected weekly and immediately after storm
events to ensure it is intact and that there are no gaps where the
fence meets the ground or tears along the length of the fence. If
gaps or tears are found during the inspection, the fabric will be
repaired or replaced immediately. Accumulated sediment will be
removed from the fence base if it reaches one-third the height of
the silt fence and hauled off-site for disposal at Springfield
Landfill. If accumulated sediment is creating noticeable strain on
the fabric and the fence might fail from a sudden storm event, the
sediment will be removed more frequently. Before the fence is
removed from the project area, the sediment will be removed. The
anticipated life span of the silt fence is 6 months and will likely
need to be replaced after this period.
Responsible Staff:
RBI Development
RBI Development, LLC
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
6 ft
(2 m) MAX.
FILTER FABRIC
(AND WIRE MESH
IF NECESSARY)
. POSTS
12" (30 mm)
FABRIC TRENCH
FRONT VIEW
2X4"
(50X100 mm) WOOD
OR
POST
WIRE MESH (IF NECESSARY)
FILTER FABRIC
(900 nan)
M(N,
18"
(450 mm)
WIN.
COMPACTED
• SOIL 4*{100 mm)
OROUN0
_V
2-3 ft
(600 mm to
900 mm)
12"
(300 mm)
(150 mm) IMN.
Figure 6. Silt fence
Design Specifications
1. The silt fence will be constructed long enough to extend across the expected flow path.
2. The support posts will be a minimum of 4.5 feet and driven a minimum of 18 to 20
inches in the ground. Posts will be spaced a maximum of 6 feet apart. Fabric will be
securely fastened to posts with half-inch staples or 16-gauge wire ties spaced a maximum
of 6 inches.
3. A 12-inch trench will be excavated along the uphill side of the silt fence posts. The
bottom edge of the fabric will extend across the bottom of the trench. The trench will be
backfilled to 4 inches above ground and compacted to bury and secure the bottom of the
filter fabric.
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Slormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
Fiber Rolls
BMP Description: Fiber rolls will be installed in the vegetated swale (see Section 2, Part 2.6)
and around the perimeter of the individual housing lots where individual lot grading and housing
construction is beginning, see Inset 1 Site Map. The rolls will consist of rolled tubes of erosion
control blankets (8 inches in diameter) and bound at each end with jute-type twine. The rolls will
be installed in shallow trenches dug 2—4 inches below ground surface and staked into the ground
using wooden stakes (24 inches long) 3 to 4 feet apart. For design specifications, see Figure 7.
Installation Schedule:
Maintenance and
Inspection:
Responsible Staff:
The perimeter fiber rolls will be installed before grading and
construction begins on the individual housing lot.
The fiber rolls will be inspected weekly and immediately after
storm events for split, torn, unraveled or slumping rolls. Any
split, torn, unraveled or slumping rolls found during the
inspection will be repaired or replaced immediately. Accumulated
sediment will be removed when accumulation reaches one-third
the height of the fiber roll and hauled off-site for disposal at
Springfield Landfill. If accumulated sediment is creating
noticeable strain on the rolls and the rolls might fail from a
sudden storm event, the sediment will be removed more
frequently. Before the fiber rolls are removed from the project
area, the sediment will be removed. The anticipated life span of
the fiber rolls is 6 months and will likely need to be replaced after
this time span.
RBI Development will be responsible for implementing perimeter
controls on lots A2-A16. J-OT-S ci-cio- &>Asmi- £e&&t- ^uC<^
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
Figure 7. Fiber rolls
Fiber roll
fl" mln
3/4" K 3/4"
wood atokea
man 4'
spacfng
Design Specifications
1. Fiber rolls will be either prefabricated rolls or rolled tubes of an erosion control blanket.
2. Field rolled fiber roll is assembled by rolling the length of erosion control blanket into a
tube of minimum 8-inch diameter and binding the roll at each end and every 4 feet along
the length of the roll with jute-type twine.
3. Use wood stakes with a nominal classification of 0.75 x 0.75 inch and minimum length of
24 inches.
4. Stake fiber rolls into a 2- to 4-inch-deep trench with a width equal to the diameter of the
fiber roll. Drive stakes at the end of each fiber roll and spaced 4 feet maximum on center.
RBI Development, LLC
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
2.8 Retain Sediment On-Site
Instructions:
Describe sediment control practices (e.g., sediment trap or sediment basin), including design
specifications and details (volume, dimensions, outlet structure) that will be implemented at the
construction site to retain sediments on-site. (For more information, see SWPPP Guide, Chapter 4, ESC
Principle 8 or EPA's CGP Part 3.13.E.)
Also, see EPA's Sediment Basin BMP Fact Sheet at
www.epa.gov/npdes/stormwater/menuofbmps/construction/sediment basins
Sediment Basin
BMP Description: An access road will be installed on lot Al for the basin. The road will be
cleared and grubbed, graded, and stabilized with crushed stone 2-4 inches in diameter and have a
minimum width of 10 feet. The sediment basin will be constructed in the northeast corner of the
construction site to remove sediment from stormwater runoff. The basin will be constructed to
have a total volume of 80,000 cubic feet. The design volume is based on calculations required in
Twin Falls County's stormwater ordinance (Ch. 10.3):
Design Volume = 3,600 cubic feet x Area
Design Volume = (3,600 cu ft/acre) x 20 acres = 72,000 cubic feet
The 80,000 cubic feet volume is slightly larger than the required volume. This is also larger than
EPA's minimum required volume of a sediment basin of 3,600 cubic feet of storage per acre of
drained (or 72,000 cubic feet).
The basin will drain—through a riser pipe open at the top with a trash rack and outlet pipe with
anti-seep collars—to a riprap spillway leading to a level spreader, which will discharge to a
natural vegetated area before discharging into Utah Creek. The slopes of the basin will be
stabilized using erosion controls as described in Section 2, Part 2.4. A silt fence will surround the
basin on the upper slopes to protect against erosion of the embankments. Influent to the basin
will be supplied by a stormwater pipe on the south end of the basin and drainage from the earth
dike channel. For design specifications, see Figure 8. The sediment basin will be converted to a
permanent detention basin following completion of construction activities at the site, see Section
4. After the conversion, a chain link fence will be installed around the perimeter and signs will
be posted on the fence indicating "danger."
Installation Schedule:
The access road and basin will be installed before site grading
begins at the site.
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Stormwater Pollution Prevention Plan (SWPPP)
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Maintenance and
Inspection:
The basin will be inspected weekly and immediately after storm
events. The banks of the basin will be checked for erosion,
seepage, and structural damage. Any damage to the embankments
will be repaired immediately. The inlets, outlets, and spillway will
be checked for any damage or obstructions and any damage
present will be repaired and the obstruction removed.
Accumulated sediments will be removed when one-half of the
volume of sediment capacity storage is reached. The removed
sediments will be hauled off-site for disposal at Springfield
Landfill.
Responsible Staff:
RBI Development
TRA5HRACK.
10" (MJN,)
EMERGENCY
i p SPILLWAY
r
5 X 5 ANTl-SEEP COLLAR
^-5'XS'CGNCBASE
10" THICK
Figure 8. Sediment basin
10' (WIN.)
Design Specifications
1. The area will be cleared, grubbed and stripped of any vegetation and root mat. The pool
area will be cleared.
2. The fill material for the embankment will be free of any vegetation, root mat, rocks, or
oversized stones. The embankment will be compacted by traversing with equipment.
3. Slopes will be stabilized in accordance with Section 2, Part 2.4.
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
2.9 Establish Stabilized Construction Exits
Instructions:
Describe location(s) of vehicle entrance(s) and exit(s), procedures to remove accumulated sediment off-
site (e.g., vehicle tracking), and stabilization practices (e.g., stone pads or wash racks or both) to minimize
off-site vehicle tracking of sediments and discharges to stormwater. (For more information, see SWPPP
Guide, Chapter 4, ESC Principle 9 and EPA's CGP Part 3, Subparts 3.4.G and 3.13.B.)
Also, see EPA's Construction Entrances BMP Fact Sheet at
www.epa.gov/npdes/stormwater/menuofbmps/construction/cons entrance
Stabilized Construction Exits before Roads are Paved
BMP Description: Stone anti-tracking pads will be installed at each exit, as identified on the site
map, to prevent the off-site transport of sediment by construction vehicles. The stabilized exits
will be a least 50 feet long, a minimum of 10 feet wide, flared at the end closest to the paved
road, and will consist of a 6-inch-thick layer of crushed stone (2 inches in diameter). The
crushed stone will be placed over a layer of geotextile filter fabric to reduce the mitigation of
sediment from the underlying soil. Orange-colored plastic mesh fence will be installed along the
length of the construction exit to keep construction vehicles and equipment on the stone anti-
tracking pads. For design specifications, see Figure 9.
Installation Schedule:
The stabilized exit will be installed before construction begins on
the site. The stone anti-tracking pads will remain in place until the
subgrade of pavement is installed at the site.
Maintenance and
Inspection:
The stabilized exit will be inspected weekly and after storm
events or heavy use. The exit to the construction site will be
maintained in a condition that will prevent sediment tracking off-
site. This could require adding additional crushed stone to the
exit. All sediment tracked, spilled, dropped, or washed onto the
road will be swept up immediately and hauled off-site for disposal
at Springfield Landfill. Once sediment clogs the voids in the
crushed stone and the effectiveness of the anti-tracking pad is no
longer keeping sediment on the site, the pad will be topdressed
with new crushed stone. Replacement of the entire pad might be
necessary when the pad becomes completely filled with sediment.
The pad will be reshaped as needed for drainage and runoff
control. Broken road pavement as a result of construction
activities on roadways immediately adjacent to the project site
will be repaired immediately. The stone anti-tracking pad will be
removed before the subgrade of pavement is applied to Johnson
Loop. The removed stone and sediment from the pad will be
hauled off-site and disposed of at Springfield Landfill.
Responsible Staff:
RBI Development
RBI Development, LLC
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
\ FILT
1
I _^^3C3^?3*f.
/
ER CLOTH f
fi* WIN
i
L_yn
EXISTING •
MOUMTAQLE
PROFILE
EXISTING GROUND
-50" M1N
10'
STANDARD
SYMBOL
SCE
Figure 9. Stabilized construction exit
PLAN VIEW
Design Specifications
1. Stone applied to the pad will be 2-inch stone.
2. The length of the pad will not be less than 50 feet (except on a single residence lot where
a 30-foot minimum would apply).
3. The thickness of the pad will not be less than 6 inches.
4. The width of pad will be a minimum of 10 feet.
5. Filter fabric will be placed over the entire area before placing the stone. Fabric will not be
required for individual lot exits.
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
Stabilized Exits for Individual Lots
BMP Description: Stone anti-tracking pads will be installed at each housing lot to prevent the
off-site transport of sediment by construction vehicles. The stabilized exits will have a minimum
length of 30 feet, per Twin Falls County's Stormwater ordinance (CH. 20.1) and will consist of a
6-inch thick layer of crushed stone (2 inches in diameter). For design specifications, see Figure
10.
Installation Schedule:
The stabilized exit will be installed before construction begins on
the individual housing lots once the main access road has been
paved.
Maintenance and
Inspection:
The stabilized exit will be inspected weekly and after storm
events or heavy use. The exit to the housing lot will be
maintained in a condition that will prevent sediment tracking onto
Johnson Loop. This might require adding additional crushed stone
to the exit. All sediment tracked, spilled, dropped, or washed onto
Johnson Loop will be swept up immediately and hauled off-site
for disposal at Springfield Landfill. Once sediment clogs the
voids in the crashed stone and the effectiveness of the anti-
tracking pad is no longer keeping sediment on-site, the pad will
be topdressed with new crushed stone. Replacement of the entire
pad might be necessary when the pad becomes completely filled
with sediment. The pad will be reshaped as needed for drainage
and runoff control.
Responsible Staff:
RBI Development j
Figure 10. Stabilized construction exit (Individual lot)
Design Specifications
1. Stone applied to the pad will be 2-inch stone.
2. The length of the pad will be a minimum of 30 feet.
3. The thickness of the pad will not be less than 6 inches.
4. The width of pad will be a minimum of 10 feet.
RBI Development, LLC
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Stabilized Construction Exits after Roads are Paved
BMP Description: After roads have been paved, a metal "ramble pad" will be placed at
each construction exit for Johnson Loop to shake sediment from vehicle tires. The
rumble pad will have a minimum length of 24 feet.
Installation Schedule:
Maintenance and
Inspection:
Responsible Staff:
The rumble pads will be installed at the exits immediately
after paving operations are complete.
Inspect rumble pads weekly and after storm events for signs
of damage or excess sediment. Remove excess sediment
from the rumble pad by sweeping.
RBI Development
Corrugated steel panels
~24 F
NOT TO SCALE
Figure 12. Rumble Pad
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Stornwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
2.10 Additional BMPs
Instructions:
- Describe additional BMPs that do not fit into the above categories.
Street Sweeping
BMP Description: Super Sweeping will perform street sweeping and vacuuming on the main
road of the subdivision (Johnson Loop) and Williams Avenue. Super Sweeping will use a
regenerative air sweeper to remove sediments and other contaminants directly from the paved
surfaces.
Installation Schedule:
Maintenance and
Inspection:
Responsible Staff:
Street sweeping will occur weekly and before forecasted storm
events on Williams Avenue and Johnson Loop
All materials collected during street sweeping will be disposed of
at an off-site location by the subcontractor.
RBI Development
Cooperative Agreement and Operator Communication
BMP Description: All construction operators working on the Clover Hills Subdivision project
are required to sign the Construction Operator's Cooperative Agreement (See Part 1.2) and agree
to abide by the conditions of the agreement throughout the duration of the construction project
regardless of whether the operator agrees to be covered under this SWPPP.
RBI Development will hold biweekly meetings to update operators on CGP compliance issues
and to discuss any issues related to implementation of this SWPPP. RBI will maintain the
SWPPP documentation and will conduct and document self-inspections in all areas of the site
under its day-to-day control. RBI will provide copies of inspection reports to the other operators
covered by this SWPPP immediately following each inspection.
Responsible Staff: RBI Development /ftSTv»o c^tsjc. TS^FC-T?CM ^> /
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
SECTION 3: GOOD HOUSEKEEPING BMPS
Instructions:
— Describe the key good housekeeping and pollution prevention (P2) measures that will be implemented to
control pollutants in stormwater.
— Categorize each good housekeeping and pollution prevention (P2) BMP under one of the following seven
categories:
3.1 Material Handling and Waste Management
3.2 Establish Proper Building Material Staging Areas
3.3 Designate Washout Areas
3.4 Establish Proper Equipment/Vehicle Fueling and Maintenance Practices
3.5 Allowable Non-Stormwater Discharges and Control Equipment/Vehicle Washing
3.6 Spill Prevention and Control Plan
3.7 Any Additional BMPs
- For more information, see SWPPP Guide, Chapter 5 and EPA's CGP Part 3, Subparts 3.4.(F), (G), (H),
and (I).
- Consult your state's design manual or resources in Appendix D of the SWPPP Guide.
— For more information or ideas on BMPs, see EPA's National Menu of BMPs
http://www.epa.gov/npdes/stormwater/menuofbmps
3.1 Material Handling and Waste Management
Instructions:
Describe measures (e.g., trash disposal, sanitary wastes, recycling, and proper material handling) to
prevent the discharge of solid materials to waters, except as authorized by a permit issued under section
404 of the CWA (For more information, see SWPPP Guide, Chapter 5, P2 Principle 1.)
Also, see EPA's General Construction Site Waste Management BMP Fact Sheet at
www.epa.gov/npdes/stormwater/menuofbmps/construction/cons wasteman
Waste Materials
BMP Description: All waste materials will be collected and disposed of into two metal trash
dumpsters in the combined staging area. Dumpsters will have a secure watertight lid, be placed
away from stormwater conveyances and drains, and meet all local and state solid-waste
management regulations. Only trash and construction debris from the site will be deposited in the
dumpsters. All personnel will be instructed, during tailgate training sessions, regarding the
correct procedure for disposal of trash and construction debris. Notices that state these practices
will be posted in the office trailer and the individual who manages day-to-day site operations will
be responsible for seeing that these practices are followed.
Installation Schedule:
Trash dumpsters will be installed once the combined staging area
has been established.
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Maintenance and
Inspection:
The dumpsters will be inspected weekly and immediately after
storm events. The dumpster will be emptied weekly and taken to
Springfield Landfill by Drake Waste and Sanitary Services. If
trash and construction debris are exceeding the dumpsters
capacity, the dumpsters will be emptied more frequently.
Responsible Staff:
RBI Development /«
Hazardous Waste
BMP Description: All hazardous waste materials such as oil filters, petroleum products, paint,
and equipment maintenance fluids will be stored in structurally sound and sealed shipping
containers in the hazardous-materials storage area and segregated from other non-waste
materials. Secondary containment will be provided for all materials in the hazardous materials
storage area and will consist of commercially available spill pallets. Additionally, all hazardous
materials will be disposed of in accordance with federal, state, and municipal regulations.
Hazardous waste materials will not be disposed of into the on-site dumpsters. All personnel will
be instructed, during tailgate training sessions, regarding proper procedures for hazardous waste
disposal. Notices that state these procedures will be posted in the office trailer and the individual
who manages day-to-day site operations will be responsible for seeing that these procedures are
followed.
Installation Schedule:
Shipping containers used to store hazardous waste materials will
be installed once the materials storage area has been installed for
the site and individual lots.
Maintenance and
Inspection:
The hazardous materials storage areas will be inspected weekly
and after storm events. The storage areas will be kept clean, well
organized, and equipped with ample cleanup supplies as
appropriate for the materials being stored. Material safety data
sheets, material inventory, and emergency contact numbers will
be maintained in the office trailer.
Responsible Staff:
RBI Development
Sanitary Waste
BMP Description: Two temporary sanitary facilities (portable toilets) will be provided at the site
in the combined staging area. The toilets will be away from a concentrated flow paths and traffic
Jlow and will have collection pans underneath as secondary containment.
Installation Schedule:
The portable toilets will be brought to the site once the combined
staging area has been established.
Maintenance and
Inspection:
All sanitary waste will be collected from the portable toilets a
minimum of three times per week by Drake Waste and Sanitary
Services. The toilets will be inspected weekly for evidence of
leaking holding tanks. Toilets with leaking holding tanks will be
removed from the site and replaced with new portable toilets.
Responsible Staff:
KB I Development / £H»STWU.
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Recycling
BMP Description: Wood pallets, cardboard boxes, and other recyclable construction scraps will
be disposed of in a designated dumpster for recycling. The dumpster will have a secure
watertight lid, be placed away from stormwater conveyances and drains and meet all local and
state solid-waste management regulations. Only solid recyclable construction scraps from the site
will be deposited in the dumpster. All personnel will be instructed, during tailgate training
sessions, regarding the correct procedure for disposal of recyclable construction scraps. Notices
that state these procedures will be posted in the office trailer, and the individual who manages
day-to-day site operations will be responsible for seeing that these procedures are followed.
Installation Schedule:
The designated recycling dumpster will be installed once the
combined staging area has been established.
Maintenance and
Inspection:
The recycling dumpster will be inspected weekly and
immediately after storm events. The recycling dumpster will be
emptied weekly and taken to an approved recycling center by
Drake Waste and Sanitary Services. If recyclable scraps (wood
pallets, cardboard boxes, and other recyclable construction
scraps) are exceeding the dumpster's capacity, the dumpster will
be emptied more frequently.
Responsible Staff:
RBI Development /
3.2 Establish Proper Building Material Staging Areas
Instructions:
— Describe construction materials expected to be stored on-site and procedures for storage of materials to
minimize exposure of the materials to stormwater, (For more information, see SWPPP Guide, Chapter 5,
P2 Principle 2 and EPA's CGP Part 3.4.H.)
Combined Staging Area
BMP Description: Construction equipment and maintenance materials will be stored at the
combined staging area and materials storage areas. Gravel bag berms will be installed around the
perimeter to designate the staging and materials storage area. A watertight shipping container
will be used to store hand tools, small parts, and other construction materials.
Nonhazardous building materials such as packaging material (wood, plastic, and glass), and
construction scrap material (brick, wood, steel, metal scraps, and pipe cuttings) will be stored in
a separate covered storage facility adjacent to the shipping container. All hazardous-waste
materials such as oil filters, petroleum products, paint, and equipment maintenance fluids will be
stored in structurally sound and sealed containers under cover within the hazardous materials
storage area.
Large items, such as framing materials and stockpiled lumber, will be stored in the open in the
storage area. Such materials will be elevated on wood blocks to minimize contact with runoff.
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Installation Schedule:
The combined staging and materials storage area will be installed
after grading and before any infrastructure is constructed at the
site. The material storage areas for individual lots will be installed
before construction begins for each house.
Maintenance and
Inspection:
Storage areas will be inspected weekly and after storm events.
Storage areas will be kept clean, well organized, and equipped
with ample cleanup supplies as appropriate for the materials being
stored. Perimeter controls, containment structures, covers, and
liners will be repaired or replaced as needed to maintain proper
function.
Responsible Staff:
RBI Development will be responsible for the overall combined
staging area and materials storage area and individual materials
storage areas on lots A2-A16.
LerTS
3.3 Designate Washout Areas
Instructions:
Describe location(s) and controls to eliminate the potential for discharges from washout areas for concrete
mixers, paint, stucco, and so on, (For more information, see SWPPP Guide, Chapter 5, P2 Principle 3.)
Also, see EPA's Concrete Washout BMP Fact Sheet ai
www.epa.aov/npdes/stormwater/menuofbmps/construction/concrete wash
Concrete Washout
BMP Description: Designated temporary, below-ground concrete washout areas will be
constructed on lots A4 and between lots C3-C4, as detailed on the site map. The temporary
below ground will be constructed as shown in Figure 11, with a recommended minimum length
and width of 10 feet, but with sufficient quantity and volume to contain all liquid and concrete
waste generated by the washout operations. The washout areas will be lined with plastic sheeting
at least 10 mils thick and free of any holes or tears. Signs will be posted marking the location of
the washout area to ensure that concrete equipment operators use the proper facility.
Concrete pours will not be conducted during or before an anticipated storm event. All excess
concrete and concrete washout slurries from the concrete mixer trucks and chutes will be
discharged to the washout area or hauled off-site for disposal. When the temporary washout
areas are no longer needed for the construction project, the hardened concrete and materials used
to construct the areas will be removed and disposed of according to the maintenance section
below and the washout areas will be backfilled, graded and stabilized with erosion controls. For
design specifications, see Figure 1_L
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Installation Schedule:
The washout areas will be constructed before the active building
phase of individual housing units.
Maintenance and
Inspection:
The washout areas will be inspected daily to ensure that all
concrete washing is being discharged into the washout area, no
leaks or tears are present, and to identify when concrete wastes
need to be removed. The washout areas will be cleaned out once
the area is filled to 75 percent of the holding capacity. Once the
area's holding capacity has been reached the concrete wastes will
be allowed to harden, the concrete will be broken up, removed,
and taken to Springfield Landfill for disposal. The plastic sheeting
will be replaced if tears occur during removal of concrete wastes
from the washout area.
Responsible Staff:
RBI Development
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Stormwater Pollution Prevention Plan (SWPPP)
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Installation Schedule:
Equipment and vehicle maintenance and fueling practices will be
implemented at the beginning of construction on-site.
Maintenance and
Inspection:
Inspect equipment/vehicle storage areas and fuel tank weekly and
after storm events. Vehicles and equipment will be inspected on
each day of use. Leaks will be repaired immediately, or the
problem vehicle(s) or equipment will be removed from the project
site. Keep ample supply of spill-cleanup materials on-site and
immediately clean up spills and dispose of materials properly.
Responsible Staff:
RBI Development
3.5 Control Equipment/Vehicle Washing
Instructions:
- Describe equipment/vehicle washing practices that will be implemented to control pollutants to stormwater.
(For more information, see SWPPP Guide, Chapter 5, P2 Principle 5.)
— Also, see EPA's Vehicle Maintenance and Washing Areas BMP Fact Sheet at
www.epa.gov/npdes/stormwater/menuofbmps/construction/vehicile maintain
BMP Description: All equipment and vehicle washing will be performed off-site.
Installation Schedule: N/A
Maintenance and
Inspection:
Responsible Staff:
N/A
RBI Development
3.6 Sp/7/ Prevention and Control
Instructions:
Describe the spill prevention and control procedures to include ways to reduce the chance of spills, stop
the source of spills, contain and clean up spills, dispose of materials contaminated by spills, and train
personnel responsible for spill prevention and control. (For more information, see SWPPP Guide, Chapter
5, P2 Principle 6 and EPA's CGP Parts 4.3 and 4.4.)
Also, see EPA's Sp/7/ Prevention and Control Plan BMP Fact sheet at
www.epa.gov/npdes/stormwater/menuofbmps/construction/spill control
Spill Prevention and Control Procedures
BMP Description:
i. Employee Training: All employees will be trained via biweekly tailgate sessions, as
detailed in Section 6, Part 6.3.
ii. Vehicle Maintenance: Vehicles and equipment will be maintained off-site. All
vehicles and equipment including subcontractor vehicles will be checked for leaking
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ill.
IV.
oil and fluids. Vehicles leaking fluids will not be allowed on-site. Drip pans will be
placed under all vehicles and equipment that are parked overnight.
Hazardous Material Storage: Hazardous materials will be stored in accordance with
Section 3, Part 1 and federal and municipal regulations.
Spill Kits: Spill kits will be within the materials storage area and concrete washout
areas.
Spills: All spills will be cleaned up immediately upon discovery. Spent absorbent
materials and rags will be hauled off-site immediately after the spill is cleaned up for
disposal at Springfield Landfill. Spills large enough to discharge to surface water will
be reported to the National Response Center at 1-800-424-8802.
Material safety data sheets, a material inventory, and emergency contact information
VI.
will be maintained at the on-site project trailer.
Installation Schedule:
The spill prevention and control procedures will be implemented
once construction begins on-site.
Maintenance and
Inspection:
All personnel will be instructed, during tailgate training sessions,
regarding the correct procedures for spill prevention and control.
Notices that state these practices will be posted in the office
trailer, and the individual who manages day-to-day site operations
will be responsible for seeing that these procedures are followed.
Responsible Staff:
RBI Development /
3,7 Any Additional BMPs
Instructions;
- Describe any additional BMPs that do not fit into the above categories. Indicate the problem they are
intended to address.
BMP Description: No Additional BMPs were identified.
Installation Schedule;
N/A
Maintenance and
Inspection:
Responsible Staff:
N/A
RBI Development
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3.8 Allowable Non-Stormwater Discharge Management
Instructions:
- Identify all allowable sources of non-stormwater discharges that are not identified. The allowable non-
stormwater discharges identified in Part 1.3.B of EPA's CGP include
S Discharges from fire-fighting activities
S Fire hydrant flushings
S Waters used to wash vehicles where detergents are not used
S Water used to control dust in accordance with EPA's CGP, Part 3, Subpart 3.4.G
•S Potable water including uncontaminated water line flushings
S Routine external building wash down that does not use detergents
•S Pavement wash waters where spills or leaks of toxic or hazardous materials have not occurred
(unless all spilled material has been removed) and where detergents are not used
S Uncontaminated air conditioning or compressor condensate
S Uncontaminated ground water or spring water
•S Foundation or footing drains where flows are not contaminated with process materials such as
solvents
S Uncontaminated excavation dewatering
•S Landscape irrigation
- Identify measures used to eliminate or reduce these discharges and the BMPs used to prevent them from
becoming contaminated.
- For more information, see SWPPP Guide, Chapter 3.A or EPA's CGP Part 1.3.B and 3.5.
List allowable non-stormwater discharges and the measures used to eliminate or reduce them and to prevent them
from becoming contaminated:
Any changes in construction activities that produce other allowable non-stormwater discharges
will be identified, and the SWPPP will be amended and the appropriate erosion and sediment
control will be implemented.
Water Used to Control Dust
BMP Description: Dust control will be implemented as needed once site grading has been
initiated and during windy conditions (forecasted or actual wind conditions of 20 mph or greater)
while site grading is occurring. Spraying of potable water at a rate of 300 gallons per acre or less
will be performed by a mobile pressure-type distributor truck no more than three times a day
during the months of May-September and once per day during the months of October-April or
whenever the dryness of the soil warrants it.
Responsible Staff: RBI Development
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Uncontaminated Excavation Dewatering
BMP Description: Because construction for this site is being conducted during the dry season,
dewatering activities are not expected to occur at the project site. If dewatering does occur, the
SWPPP will be revised to address the need for appropriate BMPs.
Responsible Staff: RBI Development
Landscape Irrigation
BMP Description: Irrigation waters will not be sprayed onto impermeable surfaces such as
paved driveways and roads. Waters will be directed onto soil and lawns by using hoses and
correctly sized sprinklers with adjustable spray patterns. To avoid discharges of irrigation waters,
the sprinklers will have low-flow rates and increased watering time. The irrigated area will be
inspected for excess watering and to adjust watering times and schedules.
Responsible Staff: RBI Development
Uncontaminated Water Line Flushing
BMP Description: Uncontaminated water from water line flushing of the site infrastructure will
be discharged to the sediment basin, while avoiding any contact with disturbed areas. If water
from the line flushing becomes contaminated, the water line will be blocked off and the flush
water will be pumped to a tanker truck, which will haul the contaminated water off-site to
Middletown POTW for disposal.
Responsible Staff: RBI Development
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SECTION 4: SELECTING POST-CONSTRUCTION BMPs
Instructions:
— Describe all post-construction stormwater management measures that will be installed during the
construction process to control pollutants in stormwater discharges after construction operations have
been completed. Examples of post-construction BMPs include the following:
^ Biofilters
S Detention/retention devices
•S Earth dikes, drainage swales, and lined ditches
S Infiltration basins
•S Porous pavement
S Other proprietary permanent structural BMPs
•S Outlet protection/velocity dissipation devices
S Slope protection
S Vegetated strips and/or swales
- Identify any applicable federal, state, local, or tribal requirements for design or installation.
- Describe how low-impact designs or smart growth considerations have been incorporated into the design.
— For any structural BMPs, you should have design specifications and details and refer to them. Attach them
as appendices to the SWPPP or within the text of the SWPPP.
— For more information on this topic, see your state's stormwater manual.
- You might also want to consult one of the references listed in Appendix D of the SWPPP Guide and EPA's
OOP Part 3, Subparts 3.4.E and 3.9.
— Visit the post-construction section of EPA's Menu of BMPs at: www.epa.gov/npes/menuofbmps
Detention Basin
BMP Description: To convert the sediment basin to a detention basin, RBI Development will
excavate the bottom of the basin to remove accumulated sediments and increase the storage
capacity of the basin below the lowest orifice in the basin's outlet to retain stormwater
temporarily. An earthen berm will be constructed from the excavated earth and configured to
extend across the flow path of the basin to separate the sediment forebay and the main pool of
the basin. The sediment forebay will be installed within the basin near the inlet to capture
sediment, debris and provide pretreatment of stormwater runoff before releasing the runoff into
the main pool of the basin. The outlet structure design does not need to be modified for this
conversion process. The detention basin will be stabilized with erosion controls as detailed in
Section 7. Design specifications are omitted from this example SWPPP.
Installation Schedule:
The basin will be converted to a permanent detention basin during
the final stabilization phase of construction.
Maintenance and
Inspection:
The basin area will be inspected weekly and after storm events
during the conversion process. The area will be checked for signs
of erosion, seepage, and structural damage. Erosion, seepage, and
structural damage will be repaired immediately. The outlet and
trash rack will be checked for any damage or obstructions and any
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damage found will be repaired and obstructions removed.
Immediately after the completion of construction, the plant
material will be watered for 14 consecutive days unless there is
sufficient natural rainfall. The area will be monitored until final
stabilization is reached.
Responsible Staff:
RBI Development
Vegetated Swale
BMP Description: The vegetated swale as described in Section 2, Part 2.3 will remain as a
permanent Stormwater management structure for the site. The swale will convey runoff to an
inlet south of lot A12.
Installation Schedule:
The swale will be installed according to the schedule found in
Section 2, Part 2.3.
Maintenance and
Inspection:
Responsible Staff:
See Section 2, Part 2.3 for maintenance and inspection procedures
for the vegetated swale. The area will be monitored until final
stabilization is reached.
RBI Development
Earth Dike
BMP Description: The earth dike as described in Section 2, Part 2.3 will remain as a permanent
Stormwater management structure for the site. The earth dike will convey runoff to the detention
basin.
Installation Schedule:
The earth dike will be installed according to the schedule found in
Section 2, Part 2.3.
Maintenance and
Inspection:
Responsible Staff:
See Section 2, Part 2.3 for maintenance and inspection procedures
for the earth dike. The area will be monitored until final
stabilization is reached.
RBI Development
Storm Drain Inlet Markers
BMP Description: The storm drain inlets on the site will be stamped with warning signs
informing the public not to dump pollutants into the drain. The markers will be approximately 6
inches round and will be attached to the inlet using a manufacturer approved adhesive.
Installation Schedule:
Storm drain markers will be installed once final pavement of
Johnson Loop has been completed.
Maintenance and
Inspection:
Responsible Staff:
N/A
RBI Development
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SECTION 5: INSPECTIONS
5.1 Inspections
Instructions:
- Identify the individual(s) responsible for conducting inspections and describe their qualifications. Reference
or attach the inspection form that will be used,
— Describe the frequency that inspections will occur at your site including any correlations to storm frequency
and intensity.
- Note that inspection details for particular BMPs should be included in Sections 2 and 3.
- You should also document the repairs and maintenance that you undertake as a result of your inspections.
These actions can be documented in the corrective action log described in Part 5,3 below.
- For more on this topic, see SWPPP Guide, Chapters 6 and 8 and EPA's CGP Part 3, Subparts 3.6.A, 3.10
and3.11.C.
- Also, see suggested inspection form in Appendix B of the SWPPP Guide.
L Inspection Personnel: Identify the person(s) who will be responsible for conducting
inspections and describe their qualifications:
• Ms. Dorothy Williams, CGP Compliance/Inspection Officer, is responsible for site
r ^compliance with this SWPPP and EPA's Construction General Permit. Ms. Williams will
ft-s conduct inspections for all areas of the site disturbed by construction activity, areas used
for storage of materials that are exposed to precipitation, discharge points, and
construction exits. LOTS ^-% «x F-*M-^^ **o^v><,$ _ MOT- •E*+<.^^*>
In the absence of Ms. Williams, Mark Wilson, Associate Compliance Officer for RBI
Development, will conduct inspections.
• Qualifications:
Dorothy Williams
1. Ms. Williams has developed construction SWPPPs for more than 30 different
construction projects and conducted inspections for those construction projects.
2. She has more than 20 years of experience complying with Stormwater regulations.
3. She received certification as a Certified Professional in Erosion and Sediment Control
(CPESC) in August 2000 (see Appendix L).
4. She completed the Fundamentals of Erosion Protection and Sediment Control
training workshop in Twin Falls County, July 2005 (see Appendix L),
Mark Wilson
1. Mr. Wilson has developed construction SWPPPs for 10 different construction
projects and conducted inspections for those construction projects.
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2. He received certification as a Certified Professional in Erosion and Sediment Control
(CPESC) in June 2003.
2. Inspection Schedule and Procedures:
Describe the inspection schedules and procedures you have developed for your site (include
frequency of inspections for each BMP or group of BMPs, indicate when you will inspect, e.g.,
before/during/and after rain events, spot inspections):
The CGP requires inspections (1) at least once every 7 days or (2) at least once every 14 days
and within 24 hours of the end of a storm event of one-half inch or greater; however, because
Ms. Dorothy Williams is on-site everyday, she will conduct inspections weekly and within 24
hours after each major storm event of one-half inch or greater. The inspections will verify that
all BMPs required in Sections 2 and 3 are implemented, maintained, and effectively
minimizing pollutants in stormwater runoff from the project site. For detailed inspection
procedures for each BMP implemented at the site, see Sections 2 and 3.
Describe the general procedures for correcting problems when they are identified. Include
responsible staff and time frames for making corrections.
• If corrective actions are identified by Ms. Williams during the inspection for areas under
day-to-day control by RBI Development, she will notify and submit a copy of the
inspection report to the Project Manager, Mr. Tared Strong. Mr. Strong will be
responsible for initiating the corrective action within 24 hours of the report and
completing maintenance as soon as possible or before the next storm event.
• If corrective actions are identified by Ms. Williams during the inspection for areas under
control by Coastal Creek Building, she will notify and submit a copy of the inspection
report to the project manager, Mr. Tared Strong and the project manager of Coastal Creek
Building, Mr. Tony Groff Mr. Groff will be responsible for initiating the corrective
action within 24 hours of the report and completing maintenance as soon as possible or
before the next storm event.
Attach a copy of the inspection report you will use for your site:
For a copy of the inspection report, see Appendix E.
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5.2 Delegation of Authority
Instructions:
- Identify the individual(s) or specifically describe the position where the construction site operator has
delegated authority for the purposes of signing inspection reports, certifications, or other information.
- Attach a copy of the signed delegation of authority form that will be used.
— For more on this topic, see SWPPP Guide, Chapter 7 and Appendix G, Subsection 11 of EPA's CGP.
Duly Authorized Representative(s) or Position(s):
RBI Development, LLC
Ms. Dorothy Williams
Compliance/Inspection Officer
13 South Avenue
Boise, ID 83701
(208)555-5555
Dwilliams@rbi.com
See Appendix K - Delegation of Authority
5.3 Corrective Action Log
Instructions:
Create here, or as an attachment, a corrective action log. This log should describe repair, replacement,
and maintenance of BMPs undertaken as a result of the inspections and maintenance procedures
described above. Actions related to the findings of inspections should reference the specific inspection
report.
This log should describe actions taken, date completed, and note the person that completed the work.
Corrective Action Log:
See Appendix F - Corrective Action Log
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SECTION 6: RECORDKEEPING AND TRAINING
6.1 Recordkeeping
Instructions:
— The following is a list of records you should keep at your project site available for inspectors to review:
- Dates of grading, construction activity, and stabilization (which is covered in Sections 2 and 3)
— A copy of the construction general permit (attach)
- The signed and certified NOI form or permit application form (attach)
— A copy of the letter from EPA or/the state notifying you of their receipt of your complete NOI/application
(attach)
- Inspection reports (attach)
— Records relating to endangered species and historic preservation (attach)
- Check your permit for additional details
- For more on this subject, see SWPPP Guide, Chapter 6.C and EPA's CGP Part 3, Subparts 3.4.C, 3.8,
3.10.Gand3.12.A.
Records will be retained for a minimum period of at least 3 years after the permit is terminated.
Date(s) when major grading activities occur:
See Appendix I - Grading and Stabilization Activities Log
Date(s) when construction activities temporarily or permanently cease on a portion of the site:
See Appendix I - Grading and Stabilization Activities Log
Date(s) when an area is either temporarily or permanently stabilized:
See Appendix I - Grading and Stabilization Activities Log
6.2 Log of Changes to the SWPPP
Instructions:
— Create a log here, or as an attachment, of changes and updates to the SWPPP. You should include
additions of new BMPs, replacement of failed BMPs, significant changes in the activities or their timing on
the project, changes in personnel, changes in inspection and maintenance procedures, updates to site
maps, and so on.
Log of changes and updates to the SWPPP
See Appendix G - SWPPP Amendment Log
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6.3 Training
Instructions:
Training your staff and subcontractors is an effective BMP. As with the other steps you take to prevent
stormwater problems at your site, you should document the training that you conduct for your staff, for
those with specific stormwater responsibilities (e.g. installing, inspecting, and maintaining BMPs), and for
subcontractors.
Include dates, number of attendees, subjects covered, and length of training.
For more on this subject, see SWPPP Guide, Chapter 8.
Individual(s) Responsible for Training:
Ms. Dorothy Williams
Describe Training Conducted:
• General stormwater and BMP awareness training for staff and subcontractors:
Ms. Williams will conduct informal training for all staff, including subcontractors, on the site.
The training will be conducted primarily via tailgate sessions and will focus on avoiding
damage to stormwater BMPs and preventing illicit discharges. The tailgate sessions will be
conducted biweekly and will address the following topics: Erosion Control BMPs, Sediment
Control BMPs, Non-Storm water BMPs, Waste Management and Materials Storage BMPs, and
Emergency Procedures specific to the construction site. (See Appendix J - Training Log)
• Detailed training for staff and subcontractors with specific stormwater responsibilities:
Ms. Williams will provide formal training to all staff and subcontractors with specific
stormwater responsibilities, such as installing and maintaining BMPs. The formal training will
cover all design and construction specifications for installing the BMPs and proper procedures
for maintaining each BMP. Formal training will occur before any BMPs are installed on the
site. (See Appendix J - Training Log)
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SECTION 7: FINAL STABILIZATION
Instructions:
— Describe procedures for final stabilization. If you complete major construction activities on part of your site,
you can document your final stabilization efforts for that portion of the site. Many permits will allow you to
then discontinue inspection activities in these areas (be sure to check your permit for exact requirements).
You can amend or add to this section as areas of your project are finally stabilized.
- Update your site plans to indicate areas that have achieved final stabilization.
- For more on this topic, see SWPPP Guide, Chapter 9 and EPA's CGP Part 3, Subparts 3.11 and 3.13.D,
and Part5, SubpartS.1.
Permanent Seeding
BMP Description: Permanent seeding will be applied immediately after the final design grades
are achieved on portions of the site but no later than 14 days after construction activities have
permanently ceased. After the entire site is stabilized, any sediment that has accumulated will be
removed and hauled off-site for disposal at Springfield Landfill. Construction debris, trash and
temporary BMPs (including silt fences, material storage areas, sanitary toilets, and inlet
protection) will also be removed and any areas disturbed during removal will be seeded
immediately.
Seedbed Preparation
a. In areas where disturbance results in subsoil being the final grade surface, topsoil
will be spread over the finished area at minimum depth of 2 to 6 inches.
b. The seedbed will be free of large clods, rocks, woody debris and other
objectionable materials.
c. Fertilizer and lime will be applied to the seedbed according to the manufacturer's
recommendations or soil tests (soil tests are omitted from this example SWPPP).
d. The top layer of soil will be loosened to a depth of 3-5 inches by raking, tilling,
disking or other suitable means.
Grass Selection/Application
a. Common areas at the site will be stabilized with a mixture of Tall Fescue,
Creeping Red Fescue and Redtop at an application rate of 30 pounds per acre or
0.95 pounds per 1,000 square feet. Lawns will be stabilized with a mixture of
Kentucky Blue Grass and Creeping Red Fescue at an application rate of 100
pounds per acre or 2.3 pounds per 1,000 square feet.
b. Seed will be applied uniformly by hydroseeding or broadcasting. Where
broadcasting is used, the seed will be covered with .25 inches of soil or less, by
cultipacking or raking.
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
Mulching
a. Hydromulch will be applied immediately following seeding at an application rate
of 90-100 pounds {2-3 bales) per 1,000 square feet.
Installation Schedule:
Maintenance and
Inspection:
Responsible Staff:
Portions of the site where construction activities have
permanently ceased will be stabilized, as soon as possible but no
later than 14 days after construction ceases.
All seeded areas will be inspected weekly during construction
activities for failure and after storm events until a dense cover of
vegetation has been established. If failure is noticed at the seeded
area, the area will be reseeded, fertilized, and mulched
immediately. After construction is completed at the site,
permanently stabilized areas will be monitored until final
stabilization is reached.
RBI Development / Cc-^^r-^c, ozjwc, 'Rv.rcawW <~
RBI Development, LLC
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
SECTION 8: CERTIFICATION AND NOTIFICATION
Instructions;
- The SWPPP should be signed and certified by the construction operator(s). Attach a copy of the NOI and
permit authorization tetter received from EPA or the state in Appendix D,
- For more information, see EPA's CGP Part 3, Subpart 3.12.A-D and Appendix G, Section 11.
I certify under penalty of law that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gathered and evaluated the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fine and imprisonment for knowing violations.
Name: T)™;Q Lew ^ «=- Title:
Signature: Q^^^, L*L^_^-V_ Date: /^/s ,
"*~g/ /
RBI Development, LLC 57
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t»i 6/i/occ g"^> Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
SECTION 8: CERTIFICATION AND NOTIFICATION
Instructions:
- The SWPPP should be signed and certified by the construction operators). Attach a copy of the NOI and
permit authorization letter received from EPA or the state in Appendix D.
— For more information, see EPA's CGP Part 3, Subpart 3.12.A-D and Appendix G, Section 11,
I certify under penalty of law that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gathered and evaluated the information submitted. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the
information, the information submitted is, to the best of my knowledge and belief, true, accurate,
and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fine and imprisonment for knowing violations.
Name: " Title:
Signature: ~7\^^_ <>!/_ _ _ Date: & / » /
.- y f
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Stormwater Pollution Prevention Plan (SWPPP)
Clover Hills Subdivision
SWPPP APPENDICES
Attach the following documentation to the SWPPP:
Appendix A - General Location Map
Appendix B - Site Maps
Appendix C - Construction General Permit
Appendix D - NOI and Acknowledgement Letter from EPA/State
Appendix E - Inspection Reports
Appendix F- Corrective Action Log
Appendix G - SWPPP Amendment Log
Appendix H - Subcontractor Certifications/Agreements
Appendix I- Grading and Stabilization Activities Log
Appendix J - Training Log
Appendix K- Delegation of Authority
Appendix L - Additional Information
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