HomeMy WebLinkAboutWPO202200037 VSMP - SWPPP 2022-09-12Stormwater Pollution Prevention
Plan — Innisfree Stream Mitigation
Bank
Prepared for:
Mr. Peter Traverse
Innisfree Stream Mitigation Bank, LLC
5505 Walnut Level Road
Crozet, VA 22932
Prepared by:
Stantec Consulting Services Inc.
5209 Center Street
Williamsburg, VA 23188
Project # 203443600
Report Date
STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
This document entitled Stormwater Pollution Prevention Plan — Innisfree Stream Mitigation Bank Innisfree
Stream Mitigation Bank Phase 2 was prepared by Stantec Consulting Services Inc. ("Stantec") for the account
of Innisfree Stream Mitigation Bank, LLC (the "Client"). Any reliance on this document by any third party is
strictly prohibited. The material in it reflects Stantec's professional judgment in light of the scope, schedule
and other limitations stated in the document and in the contract between Stantec and the Client. The opinions
in the document are based on conditions and information existing at the time the document was published
and do not take into account any subsequent changes. In preparing the document, Stantec did not verify
information supplied to it by others. Any use which a third party makes of this document is the responsibility of
such third party. Such third party agrees that Stantec shall not be responsible for costs or damages of any
kind, if any, suffered by it or any other third party as a result of decisions made or actions taken based on this
document.
Prepared by jnm�k�
(signature)
Carly Morris
Reviewed by Ga
si nature)
Gene Haffey
Approved by ':�
i
(signature)
Travis Crayosky
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STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
Table of Contents
1.0 CONTACT INFORMATION/RESPONSIBLE PARTIES................................................1.1
1.1 OPERATORS/SUBCONTRACTORS.............................................................................1.1
2.0
SITE EVALUATION, ASSESSMENT, AND PLANNING...............................................2.3
2.1
PROJECT/SITE INFORMATION...................................................................................2.3
2.2
OFFSITE SUPPORT ACTIVITIES.................................................................................2.3
2.3
DISCHARGE INFORMATION........................................................................................2.5
2.4
IMPAIRED WATERS AND TMDL LIMITATIONS...........................................................2.7
2.4.1 Polychlorinated biphenyl (PCB) impaired waters.........................................2.7
2.5
EXCEPTIONAL WATERS LIMITATIONS......................................................................2.8
2.6
NATURE OF THE CONSTRUCTION ACTIVITY...........................................................2.9
2.6.1 General Description of Project......................................................................2.9
2.6.2 Size of Construction Project.........................................................................2.9
2.7
SEQUENCE AND ESTIMATED DATES OF CONSTRUCTION ACTIVITIES ...............2.9
PRE -CONSTRUCTION: ............................................................................................................
2.9
1.
THE CONTRACTOR SHALL BE RESPONSIBLE FOR DETERMINING THE
EXACT LOCATIONS OF ALL EXISTING UTILITIES WITHIN THE PROJECTS
AREA PRIOR TO CONSTRUCTION OPERATIONS AND MUST CONTACT
MISS UTILITY (811) PRIOR TO THE COMMENCEMENT OF ANY
CONSTRUCTION ACTIVITIES. THE CONTRACTOR MUST ARRANGE A PRE -
CONSTRUCTION MEETING WITH CHARLOTTE COUNTY AND THE
SOUTHSIDE SOIL & WATER CONSERVATION DISTRICT........................................2.9
2.8
PROHIBITION OF NONSTORMWATER DISCHARGES............................................2.11
2.9
AUTHORIZED NONSTORMWATER DISCHARGES..................................................2.12
2.10
SITE PLAN...................................................................................................................2.12
2.11
EROSION AND SEDIMENT CONTROL PLAN............................................................2.13
3.0
EROSION AND SEDIMENT CONTROLS...................................................................3.16
3.1
SAFETY FENCE..........................................................................................................3.16
3.1.1 General.......................................................................................................3.16
3.1.2 Specific Safety Controls.............................................................................3.16
3.2
SEDIMENT TRACK -OUT (ROAD STABILIZATION)...................................................3.17
3.2.1 General.......................................................................................................3.17
3.2.2 Specific Track -Out Controls........................................................................3.17
3.3
SEDIMENT BARRIERS (PERIMETER CONTROLS AND INLET PROTECTION) ......
3.18
3.3.1 General.......................................................................................................3.18
3.3.2 Maintenance Requirements........................................................................3.18
3.3.3 Specific Sediment Barrier Controls.............................................................
3.18
3.4
WATERWAY AND OUTLET PROTECTION................................................................3.20
3.4.1 General.......................................................................................................3.20
3.4.2 Specific Waterway and Outlet Protection Controls .....................................
3.20
3.5
STREAM PROTECTION..............................................................................................3.21
3.5.1 General.......................................................................................................3.21
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STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
3.5.2 Temporary Vehicular Stream Crossing......................................................
3.21
3.5.3 Dewatering Structure..................................................................................3.21
3.6
SITE PREPARATION FOR VEGETATION ESTABLISHMENT, SOIL
COMPACTION, STOCKPILING...................................................................................3.21
3.6.1 General.......................................................................................................3.21
3.6.2 Specific Site Preparation For Vegetation Establishment, Soil
Compaction, Stockpiling.............................................................................3.21
3.7
GRASS ESTABLISHMENT, SITE STABILIZATION....................................................3.22
3.7.1 General.......................................................................................................3.22
3.7.2 Site Stabilization Practice 1........................................................................3.22
3.7.3 Site Stabilization Practice 2........................................................................3.23
3.8
MULCHES, STEEP SLOPE PROTECTION................................................................3.24
3.8.1 Mulches and Steep Slope Protection Practice...........................................3.24
3.9
OTHER VEGETATION CONTROLS...........................................................................3.25
3.9.1 Tree Protection...........................................................................................3.25
3.10
MINIMIZE DUST..........................................................................................................3.25
3.10.1 General.......................................................................................................3.25
3.10.2 Specific Dust Controls................................................................................3.26
3.11
CHEMICAL TREATMENT............................................................................................3.26
3.11.1 Soil Types...................................................................................................3.26
3.11.2 Treatment Chemicals.................................................................................3.26
3.11.3 Schematic Drawings of Stormwater Controls/Chemical Treatment
Systems......................................................................................................
3.27
3.11.4 Training.......................................................................................................3.27
4.0
POLLUTION PREVENTION STANDARDS.................................................................4.28
4.1
POTENTIAL SOURCES OF POLLUTION...................................................................4.28
4.2
CONSTRUCTION SITE POLLUTANTS.......................................................................4.28
4.3
POLICIES AND PROCEDURES..................................................................................4.29
4.4
SPILL PREVENTION AND RESPONSE.....................................................................4.29
4.5
SPILL REPORTING.....................................................................................................4.30
4.5.1 Reports of Unauthorized Discharges..........................................................4.30
4.5.2 Reports of Unusual or Extraordinary Discharges.......................................4.31
4.5.3 Reports of Noncompliance .........................................................................4.31
4.6
FUELING AND MAINTENANCE OF EQUIPMENT OR VEHICLES............................4.32
4.6.1 General.......................................................................................................4.32
4.7
WASHING OF EQUIPMENT AND VEHICLES............................................................4.32
4.7.1 General.......................................................................................................4.32
4.8
STORAGE, HANDLING, AND DISPOSAL OF CONSTRUCTION PRODUCTS,
MATERIALS, AND WASTES.......................................................................................4.33
4.8.1 Building Products........................................................................................4.33
4.8.2 Pesticides, Herbicides, Insecticides, Fertilizers, and Landscape
Materials.....................................................................................................
4.34
4.8.3 Diesel Fuel, Oil, Hydraulic Fluids, Other Petroleum Products, and
OtherChemicals.........................................................................................4.34
4.8.4 Hazardous or Toxic Waste.........................................................................4.35
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
4.8.5 Construction and Domestic Waste.............................................................4.35
4.8.6 Sanitary Waste...........................................................................................4.36
4.8.7 Excess Concrete........................................................................................4.36
4.8.8 Exposure of Waste Materials to Precipitation.............................................4.36
4.8.9 Other Pollution Prevention Practices..........................................................4.36
5.0
INSPECTION AND CORRECTIVE ACTION...............................................................5.37
5.1
INSPECTION PERSONNEL AND PROCEDURES.....................................................5.37
5.1.1 Personnel Responsible for Inspections......................................................5.37
5.2
INSPECTION SCHEDULE...........................................................................................5.37
5.2.1 Surface Waters Not Impaired, TMDL, nor Exceptional...............................5.37
5.2.2 Impaired, TMDL, or Exceptional Surface Waters.......................................5.37
5.2.3 Inspection Requirements............................................................................5.38
5.3
INSPECTION REPORT...............................................................................................5.40
5.3.1 Rainfall Tracking.........................................................................................5.41
5.4
CORRECTIVE ACTION...............................................................................................5.41
5.4.1 Personnel Responsible for Corrective Actions ...........................................
5.41
5.4.2 Corrective Action Forms.............................................................................5.41
6.0
RECORDKEEPING.....................................................................................................6.43
6.1
RECORDKEEPING......................................................................................................6.43
6.2
LOG OF CHANGES TO THE SWPPP.........................................................................6.43
6.3
PUBLIC NOTIFICATION/SIGNAGE.............................................................................6.44
6.4
SWPPP AVAILABILITY ................................................................................................6.44
6.5
TERMINATION OF GENERAL PERMIT COVERAGE................................................6.45
7.0
CERTIFICATION.........................................................................................................7.47
LIST OF TABLES
Table 1
— Names of Receiving Waters.........................................................................2.5
Table 2
— Impaired Waters/TMDLs`............................................................................2.6
Table 3
— Exceptional Waters....................................................................................2.6
Table 4
— List of Authorized Nonstormwater Discharges Present at the Site.......................2.12
Table 5
— Construction Site Pollutants........................................................................4.28
Table 6
— Spill Notification Table...............................................................................4.30
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
APPENDICES
APPENDIX A
APPENDIX B
APPENDIX C
APPENDIX D
APPENDIX E
APPENDIX F
APPENDIX G
APPENDIX H
APPENDIX I
APPENDIX J
APPENDIX K
APPENDIX L
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GENERAL LOCATION MAP
PROJECT PLANS
CONSTRUCTION GENERAL PERMIT
NOTICE OF COVERAGE LETTER, CGP REGISTRATION STATEMENT
AND NOTICE OF TERMINATION (NOT)
INSPECTION PERSONNEL INFORMATION AND QUALIFICATIONS,
PRECIPITATION LOG, AND INSPECTION REPORTS
CORRECTIVE ACTION LOG
GRADING AND STABILIZATION ACTIVITIES LOG
SUBCONTRACTOR CERTIFICATIONS/AGREEMENTS
MAINTENANCE AGREEMENTS FOR STORMWATER MANAGEMENT
FACILITIES
DELEGATION OF AUTHORITY
LOG OF CHANGES AND UPDATES TO SWPPP
ADDITIONAL SUPPORTING INFORMATION
STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
CONTACT INFORMATION/RESPONSIBLE PARTIES
1.0 CONTACT INFORMATION/RESPONSIBLE PARTIES
1.1 OPERATORS/SU BCONTRACTORS
Operators:
Innisfree Stream Mitigation Bank, LLC
Peter Traverse
5505 Walnut Level Road
Crozet, VA 22932
(434) 823-5400
Project Manager(s) or Site Supervisor(s):
Innisfree Stream Mitigation Bank, LLC
Peter Traverse
5505 Walnut Level Road
Crozet, VA 22932
(434) 823-5400
Stormwater Managers) or SWPPP Contact(s):
Innisfree Stream Mitigation Bank, LLC
Peter Traverse
5505 Walnut Level Road
Crozet, VA 22932
(434) 823-5400
Contractor:
Innisfree Stream Mitigation Bank, LLC
Peter Traverse
5505 Walnut Level Road
Crozet, VA 22932
(434)823-5400
Subcontractor(s):
The subcontractor(s) was not determined at the time of SWPPP development. Once the subcontractor(s)
is identified, subcontractor certifications will be included in Appendix H.
Emergency 24-Hour Contact(s):
Innisfree Stream Mitigation Bank, LLC
Peter Traverse
5505 Walnut Level Road
Crozet, VA 22932
(434) 823-5400
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1.1
STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
SITE EVALUATION, ASSESSMENT, AND PLANNING
2.0 SITE EVALUATION, ASSESSMENT, AND PLANNING
2.1 PROJECT/SITE INFORMATION
Project/Site Name: Innisfree Stream Mitigation Bank Phase 2
Project Street/Location: 5505 Walnut Level Road
City: Crozet
State: Virginia
ZIP Code: 22932
Project Latitude/Longitude'
Latitude: 38.187957 ° N Longitude:-78.690876 ° W
Method for determining latitude/longitude:
❑ USGS topographic map (specify scale: ) ❑ EPA Web site ❑ GPS
® Other (please specify): Google Earth Pro
Additional Project Information
If you are conducting construction activities in response to a public emergency, document the cause
of the public emergency (e.g., natural disaster, extreme flooding conditions), information
substantiating its occurrence (e.g., state disaster declaration), and a description of the construction
necessary to reestablish effective public services:
Status of the construction activity (e.g. federal, state, public, or private): Private
Permit (CGP) project or permit tracking number: Pending
2.2 OFFSITE SUPPORT ACTIVITIES
If offsite support activities will be used, information on the support activities is provided here:
❑ Offsite Support Activities
' See Appendix A for Site Map
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2.3
STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
SITE EVALUATION, ASSESSMENT, AND PLANNING
Offsite Support Location
Site Name:
N/A
Street/Location:
N/A
City:
N/A
State:
N/A
ZIP Code:
N/A
Latitude:
N/A
Longitude:
N/A
Is this offsite support activity covered under this general permit of a separate VPDES permit?
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STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
SITE EVALUATION, ASSESSMENT, AND PLANNING
2.3 DISCHARGE INFORMATION
Does your project/site discharge stormwater into a Municipal Separate Storm Sewer System (MS4)?
❑ Yes ® No
Table 1 — Names of Receiving Waters
Name(s) of the first surface water that receives stormwater directly from your site and/or from the MS4 (note:
multiple rows provided where your site has more than one point of discharge that flows to different surface
waters) and sixth (6'h) order Hydrologic Unity Code (HUC):
1. Doyles River
JR04
2.
3.
4.
5.
6.
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STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
SITE EVALUATION, ASSESSMENT, AND PLANNING
Table 2 — Impaired Waters/TMDLs *
If you answered yes, then answer the following:
Is this surface water
listed as "impaired"?
What pollutant(s) are causing the
impairment?'
Has a TMDL
been completed?
.,
Title of the TMDL document
Pollutant(s) for which
there is a TMDL'
1.
❑ YES ❑ NO
❑ YES ❑ NO
2.
❑ YES [-]NO
❑ YES ❑ NO
3.
❑ YES ❑ NO
❑ YES ❑ NO
Describe the method(s) you used to determine whether or not your project/site discharges to an impaired water: 9VAC-260 Special Standards:
N/A
Table 3 — Exceptional Waters
Is this surface water listed as "exceptional"?
1.
❑ YES
®NO
2.
❑ YES
❑ NO
3.
❑ YES
❑ NO
4.
❑ YES
❑ NO
5.
❑ YES
❑ NO
6.
❑ YES
❑ NO
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Note: DEQ will perform a search during the processing of the
registration statement for permit coverage for receiving waters that
drain to waters identified as impaired or for which a TMDL wasteload
allocation has been established and approved or that are identified as
exceptional waters. This information will be provided with the issuance
of the notice of coverage letter.
** Note: The Chesapeake Bay Watershed TMDL applies to this project
which results in enhanced requirements outlined in this SWPPP in
Section 2.3 Impaired Waters and TMDL Limitations.
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STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
SITE EVALUATION, ASSESSMENT, AND PLANNING
2.4 IMPAIRED WATERS AND TMDL LIMITATIONS
Discharges of stormwater from construction activities to surface waters identified as impaired in the 2016
§ 305(b)/303(d) Water Quality Assessment Integrated Report or for which a TMDL wasteload allocation
has been established and approved prior to the term of the general permit for (i) sediment or a sediment -
related parameter (i.e., total suspended solids or turbidity), or (ii) nutrients (i.e., nitrogen or phosphorus),
are not eligible for coverage under the general permit unless the operator develops, implements, and
maintains a SWPPP in accordance with Part II A 5 (of the CGP) that minimizes the pollutants of concern
and, when applicable, is consistent with the assumptions and requirements of the approved TMDL
wasteload allocations and implements an inspection frequency consistent with Part II F 2 a (of the CGP).
In addition, the operator shall implement the following items:
(1) The impaired water(s), approved TMDL(s), and pollutant(s) of concern, when applicable, shall be
identified in the SWPPP;
(2) Permanent or temporary soil stabilization shall be applied to denuded areas within seven days after
final grade is reached on any portion of the site;
(3) Nutrients shall be applied in accordance with manufacturer's recommendations or an approved
nutrient management plan and shall not be applied during rainfall events; and
(4) The applicable SWPPP inspection requirements specified in Part II F 2 (of the CGP) for construction
activities that discharge to a surface water identified in Part II B 5 and 6 (of the CGP) as impaired or
having an approved TMDL:
(a) Inspections shall be conducted at a frequency of (i) at least once every four business days or (ii) at
least once every five business days and no later than 24 hours following a measurable storm
event. In the event that a measurable storm event occurs when there are more than 24 hours
between business days, the inspection shall be conducted on the next business day; and
(b) Representative inspections used by utility line installation, pipeline construction, or other similar
linear construction activities shall inspect all outfalls discharging to surface waters identified as
impaired or for which a TMDL wasteload allocation has been established and approved prior to the
term of the general permit.
2.4.1 Polychlorinated biphenyl (PCB) impaired waters.
For discharges from construction activities that includes the demolition of any structure with at least
10,000 square feet of floor space built or renovated before January 1, 1980 to surface waters (i) identified
as impaired in the 2016 § 305(b)/303(d) Water Quality Assessment Integrated Report or (ii) with an
2 Note: Measurable storm event means a rainfall event producing 0.25 inches of rain or greater over 24
hours.
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STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
SITE EVALUATION, ASSESSMENT, AND PLANNING
applicable TMDL wasteload allocation established and approved prior to the term of this general permit
for PCBs, the operator shall
(1) Identify the impaired water(s), approved TMDL(s) and pollutant of concern in the SWPPP; and
(2) Include procedures in the SWPPP for:
(a) Implementation of controls to minimize the exposure of PCB -containing building materials,
including paint, caulk, and pre-1980 fluorescent lighting fixtures, to precipitation and to
stormwater such as separating work areas from non -work areas and selecting appropriate
personal protective equipment and tools, constructing a containment area so that all dust or
debris generated by the work remains within the protected area, using tools that minimize dust
and heat(<212°F);
(b) Disposal of such materials is performed in compliance with applicable state, federal, and local
requirements; and
(c) A modified inspection schedule shall be implemented in accordance with Part II F 2 a (of the
CGP):
i. Inspections shall be conducted at a frequency of (i) at least once every four business days or
(ii) at least once every five business days and no later than 24 hours following a measurable
storm event. In the event that a measurable storm event occurs when there are more than 24
hours between business days, the inspection shall be conducted on the next business day;
and
ii. Representative inspections used by utility line installation, pipeline construction, or other
similar linear construction activities shall inspect all outfalls discharging to exceptional waters.
2.5 EXCEPTIONAL WATERS LIMITATIONS
Discharges of stormwater from construction activities not previously covered under the general permit
issued in 2009 to exceptional waters identified in 9VAC25-260-30 A 3 c are not eligible for coverage
under the general permit unless the operator implements the following:
(1) The exceptional water(s) shall be identified in the SWPPP;
(2) Permanent or temporary soil stabilization shall be applied to denuded areas within seven days after
final grade is reached on any portion of the site;
(3) Nutrients shall be applied in accordance with manufacturer's recommendations or an approved
nutrient management plan and shall not be applied during rainfall events; and
(4) The applicable SWPPP inspection requirements specified in Part II F 2 (of the CGP) shall be
amended as follows as per Part I B 5 of the CGP:
(a) Inspections shall be conducted at a frequency of (i) at least once every four business days or (ii)
at least once every five business days and no later than 24 hours following a measurable storm
event. In the event that a measurable storm event occurs when there are more than 24 hours
between business days, the inspection shall be conducted on the next business day; and
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STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
SITE EVALUATION, ASSESSMENT, AND PLANNING
(b) Representative inspections used by utility line installation, pipeline construction, or other similar
linear construction activities shall inspect all outfalls discharging to exceptional waters.
2.6 NATURE OF THE CONSTRUCTION ACTIVITY
2.6.1 General Description of Project
The proposed Innisfree Mitigation Bank — Phase 2 project includes the restoration, enhancement, and
preservation of stream reaches, as well as the associated buffer planting and preservation areas. The
bank includes unnamed tributaries to Doyles Creek. Phase 2 includes approximately 66,666 linear feet of
stream channel.
What is the function of the construction activity?
❑ Residential ❑ Commercial ❑ Industrial ❑ Road Construction
❑ Linear Utility
® Other (please specify): Stream Restoration
2.6.2 Size of Construction Project
What is the size of the property (in acres), the total area expected to be disturbed by the construction
activities (in acres), and the maximum area expected to be disturbed at any one time?
Total Area of Development = 103.2 acres
Estimated Area to be Disturbed = 9.9 acres
2.7 SEQUENCE AND ESTIMATED DATES OF CONSTRUCTION
ACTIVITIES
Pre -Construction:
1. The Contractor shall be responsible for determining the exact locations of all existing utilities within
the projects area prior to construction operations and must contact Miss Utility (811) prior to the
commencement of any construction activities. The Contractor must arrange a pre -construction
meeting with Charlotte County and the Southside Soil & Water Conservation District.
Phase 1 — Site Preparation:
1. Install stone construction entrances per Std. & Spec. 3.02.
2. Install silt fence, super silt fence, and tree protection where shown.
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STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
SITE EVALUATION, ASSESSMENT, AND PLANNING
3. Install Phase 1 erosion and sediment control measures according to standards set forth in the Virginia
Erosion and Sediment Control Handbook, Third Edition 1992. These measures shall be implemented
prior to the commencement of any earthwork activities on -site.
4. Upon approval of County Staff, commence with tree removal, clearing, and grubbing operations. Tree
removal, clearing, grubbing, and any demolition shall be performed in phases to minimize earth
disturbance during construction.
5. Concurrent with the tree removal and clearing and grubbing operations, Contractor shall install timber
mats, mulch access road stabilization, and/or gravel access road stabilization. Installation shall be
progressively in advance of heavy equipment used to place these practices such that the weight of
the equipment is borne by previously installed section of the road as it is constructed.
6. Invasive plant species within the LOD shall be removed and/or controlled as detailed.
7. It is the intent of these plans to avoid clearing to the greatest extent practical. However, clearing and
grubbing operations shall proceed as necessary to facilitate earthwork activities. Existing vegetation
called out to be preserved shall be protected from disturbance and compaction of heavy equipment.
All additional cleared woody vegetation shall be removed, chipped, stockpiled, and used for organic
matter on -site.
8. Protect all sanitary sewer pipes, manholes, existing dry utilizes (e.g. electrical, gas, cable, phone, TV,
etc.) and storm sewer pipes crossed throughout the project using timber matting or approved
alternative.
9. Contractor shall only grade an area that can be stabilized within the same day.
10. At completion of Phase 1, all E&S Phase 1 protection measures, access roads, staging areas, shall
be established.
Phase 2 - Channel Construction:
1. Construction activities shall be performed in reach segments in an effort to minimize disturbance.
a. Upon approval by Engineer/Designer and the County, the Contractor may proceed with
grading, stabilization, and restoration activities for the tributaries.
b. Wthin a respective reach segment, instream work should be done from upstream to
downstream.
2. All work withing the stream channels shall be performed in the dry. Approved clean water diversion
measures (check dam, pump around diversion pump with dewatering bag) shall be utilized to ensure
that sediment laden water is not discharged into the stream channel. The clean water diversion shall
be of sufficient length to ensure that all work within the daily work zone is performed in the dry.
3. The daily construction segments shall be determined by the Contractor, but the stream will be
permanently or temporarily stabilized and reconnected at the end of each workday.
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STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
SITE EVALUATION, ASSESSMENT, AND PLANNING
4. Pump around diversion shall not be operated at night, unless approved under separate cover by
County.
5. Contractor shall salvage stream bed substrate material from the existing channel. This material will be
used as infill for streambed reinforcement areas.
6. Installed E&S measures (e.g. tree protection, silt fence, super silt fence, and safety fence) to remain
in place until final stabilization of all disturbed areas has been achieved.
7. Commence with grading of the new stream channel, sections, profile, and installation of grade control
structure as construction moves downstream.
8. During grading operation, strip existing topsoil and stockpile separately. Topsoil must be free of
unsuitables. Stripped topsoil shall be used for the bank protection and for final soil amendments
elsewhere.
9. No stream banks shall be left exposed (i.e. bare) at the end of the work day. All stream banks shall be
covered with matting before the Contractor stops work for the day. Contractor shall temporarily cover
any disturbed areas with matting at the end of each work day, only if final stabilization is not
completed by the end of the day. In addition, any remaining disturbed areas in the overbank zones
shall be protected from sheet flow with silt fence until work continues the next day.
10. After all stream work is complete and approved by County and Engineer/Designer, the Contractor
may commence with demobilizing pump -around diversions.
11. Upon completion of all stream restoration activities, all temporary erosion and sediment control
measures shall be removed within 30 days. Any concentrated sediment along the erosion and
sediment controls measures shall be respread and stabilized with seed/mulch in uplands.
12. Contractor shall notify County and Engineer/Designer upon completion of cleanup activities to
arrange a final site inspection.
Contractor shall coordinate with County and Engineer/Designer to schedule installation of woody
vegetation including trees and shrubs. As the planting window for this vegetation may not fall within the
construction window, the planting shall be scheduled at the earliest time possible as shown in
specifications or as approved by County and Engineer/Designer.
2.8 PROHIBITION OF NONSTORMWATER DISCHARGES
Except as provided in Parts I A 2, 1 C and I E of the Construction General Permit, all discharges covered
by the general permit shall be composed entirely of stormwater associated with construction activities. All
other discharges including the following are prohibited:
• Wastewater from washout of concrete;
• Wastewater from the washout and cleanout of stucco, paint, form release oils, curing compounds,
and other construction materials;
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STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
SITE EVALUATION, ASSESSMENT, AND PLANNING
• Fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance;
• Oils, toxic substances, or hazardous substances from spills or other releases; and
• Soaps, solvents, or detergents used in equipment and vehicle washing.
2.9 AUTHORIZED NONSTORMWATER DISCHARGES
The following nonstormwater discharges from construction activities are authorized by the general permit.
Table 4 — List of Authorized Nonstormwater Discharges Present at the Site
Type of Authorized Nonstormwater Discharge
Likely to be Present at
Your Site?
Discharges from firefighting activities
❑ YES
E NO
Fire hydrant flushings
❑ YES
ENO
Water used to wash vehicles or equipment where soaps, solvents, or detergents have
not been used and the wash water has been filtered, settled, or similarly treated prior
E YES
❑ NO
to discharge
Water used to control dust that has been filtered, settled, or similarly treated prior to
E YES
❑ NO
discharge
Potable water source, including uncontaminated waterline flushings managed in a
❑ YES
ENO
matter to avoid an instream impact
Routine external building wash down where soaps, solvents, or detergents have not
been used and the wash water has been filtered, settled, or similarly treated prior to
❑ YES
ENO
discharge
Pavement wash waters where spills or leaks of toxic or hazardous materials have not
occurred (or where all spilled or leaked material has been removed prior to washing);
❑ YES
ENO
where soaps, solvents, or detergents have not been used; and where the wash water
has been filtered, settled, or similarly treated prior to discharge
Uncontaminated air conditioning or compressor condensate
❑ YES
ENO
Uncontaminated groundwater or spring water
E YES
❑ NO
Foundation or footing drains where flows are not contaminated with process materials
❑ YES
ENO
such as solvents
Uncontaminated, excavation dewatering, including dewatering of trenches and
❑ YES
E NO
excavations that have been filtered, settled, or similarly treated prior to discharge
Landscape irrigations
❑ YES
E NO
(Note: You are reminded of the requirement to identify the likely locations of these authorized nonstormwater
discharges on your site map.)
2.10 SITE PLAN
A general location map showing the location of the project site is provided in Appendix A. This site map
shows the location of the existing or proposed land disturbing activities, the limits of land disturbance,
construction entrances, and all water bodies receiving stormwater discharges from the site.
2.12
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
SITE EVALUATION, ASSESSMENT, AND PLANNING
Detailed site information is provided in the Erosion and Sediment Control Plans/Construction Plans for the
project. The plans are hereby incorporated by reference as part of this SWPPP and are provided in
Appendix B.
2.11 EROSION AND SEDIMENT CONTROL PLAN
The SWPPP shall include an erosion and sediment control plan approved by the VESCP authority as
authorized under the Erosion and Sediment Control Regulations (9VAC25-840) unless the operator
receives from the VESCP an "agreement in lieu of a plan" as defined in 9VAC25-840-10 or prepares the
erosion and sediment control plan in accordance with annual standards and specifications approved by
the department. The operator of any land disturbing activity that is not required to obtain erosion and
sediment control plan approval from a VESCP authority or is not required to adopt department -approved
annual standards and specifications shall submit the erosion and sediment control plan to the department
for review and approval.
All erosion and sediment control plans shall include a statement describing the maintenance
responsibilities required for the erosion and sediment controls used.
A properly implemented approved erosion and sediment control plan, "agreement in lieu of a plan," or
erosion and sediment control plan prepared in accordance with department -approved annual standards
and specifications, that adequately:
Review the cross-references below against the ESC measures actually contained in the specific SWPPP.
(1( Controls the volume and velocity of stormwater runoff within the site to minimize soil erosion (MS-11
and MS-19, Environmental Site Design Principles 6 & 7, Std. & Spec. 3.18-3.21);
(a) See Sections 3.3, 3.4, and 3.5;
(b) Sediment basins and traps, perimeter dikes, sediment barriers and other measures intended to
trap sediment shall be constructed as a first step in any land disturbing activity and shall be made
functional before upslope land disturbance takes place;
(2) Controls stormwater discharges, including peak flow rates and total stormwater volume, to minimize
erosion at outlets and to minimize downstream channel and stream bank erosion (MS-11 and MS-19,
Environmental Site Design Principle 6);
(a) See Section 3.5, and 3.8;
(b) Sediment basins and traps, perimeter dikes, sediment barriers and other measures intended to
trap sediment shall be constructed as a first step in any land disturbing activity and shall be made
functional before upslope land disturbance takes place;
(3) Minimizes the amount of soil exposed during the construction activity (MS-1, MS-3 & MS-4,
Environmental Site Design Principles 3, 4 & 5);
(a) See Sections 3.2, 3.10, 3.11, and 3.12;
2.13
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
SITE EVALUATION, ASSESSMENT, AND PLANNING
(4) Minimizes the disturbance of steep slopes (MS-7, MS-8 & MS-9, Environmental Site Design
Principles 3 & 5);
(a) See Section 3.4. 3.6, 3.11, and 3.12;
(5) Minimizes sediment discharges from the site in a manner that addresses (i) the amount, frequency,
intensity, and duration of precipitation; (ii) the nature of resulting stormwater runoff; and (iii) soil
characteristics, including the range of soil particle sizes present on the site (19 Minimum Standards,
Stds & Specs of the VESCH Chapter 3);
(a) See Section 3.2, 3.3, 3.5, 3.10, 3.11, 3.12, 3.14 and 3.15;
(b) Soils information is provided on the project plans.
(6) Provides and maintains natural buffers around surface waters, directs stormwater to vegetated areas
to increase sediment removal, and maximizes stormwater infiltration, unless infeasible
(Environmental Site Design Principles 4, 5 & 8, Std. & Spec. 3.38);
(a) See Section 3.8 and 3.13;
(b) The project site is located in a critical area since it is in a jurisdictional feature. Additionally,
existing wetlands are located in the project area. These areas are protected by the ESC plan.
(7) Minimizes soil compaction and, unless infeasible, preserves topsoil (MS-2, Std. & Spec. 3.30,
Environmental Site Design Principle 4 & 8);
(a) See Section 3.10;
(b) Areas to remain undisturbed are shown on the plans based on the limits of disturbance;
(8) Ensures that stabilization of disturbed areas will be initiated immediately whenever any clearing,
grading, excavating, or other land -disturbing activities have permanently ceased on any portion of the
site, or temporarily ceased on any portion of the site and will not resume for a period exceeding 14
days (MS-1, MS-3 & MS-1 8, Stds & Specs 3.28 to 3.38); and
(a) See Section 3.11 and 3.12;
(b) Stabilization of disturbed areas will be initiated immediately whenever any clearing, grading,
excavating, or other land -disturbing activities have permanently ceased on any portion of the site,
or temporarily ceased on any portion of the site and will not resume for a period exceeding 14
days. Immediately means as soon as practicable, but no later than the end of the next business
day, following the day when the land -disturbing activities have temporarily or permanently
ceased. Immediately is used in the context of the CGP to define the deadline for initiating
stabilization measures;
(c) As outlined in Section 2.3 of this SWPPP and in Part 1.B.4.b. of the CGP, permanent or temporary
soil stabilization shall be applied to denuded areas within seven days after final grade is reached
on any portion of the site;
(9) Utilizes outlet structures that withdraw stormwater from the surface (i.e., above the permanent pool or
wet storage water surface elevation), unless infeasible, when discharging from sediment basins or
sediment traps (Stds & Specs 3.13 and 3.14);
2.14
STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
SITE EVALUATION, ASSESSMENT, AND PLANNING
(a) See Section 3.5;
(b) Outlet structures that withdraw stormwater from the surface (i.e., above the permanent pool or
wet storage water surface elevation) must be utilized, unless infeasible, when discharging from
sediment basins or sediment traps.
The approved erosion and sediment control plan is hereby incorporated by reference as part of this
SWPPP and copies will be provided in Appendix B.
M
2.15
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
EROSION AND SEDIMENT CONTROLS
3.0 EROSION AND SEDIMENT CONTROLS
• All erosion and sediment control measures shall be installed and maintained in accordance with the
Virginia Erosion and Sediment Control Handbook, Third Edition, 1992.
• All control measures must be properly maintained in effective operating condition in accordance with
good engineering practices and, where applicable, manufacturer specifications. If a site inspection
required by Part II F (of the CGP) identifies a control measure that is not operating effectively,
corrective action(s) shall be completed as soon as practicable, but no later than seven days after
discovery or a longer period as established by the VSMP authority, to maintain the continued
effectiveness of the control measures.
• If site inspections required by Part II F (of the CGP) identify an existing control measure that needs to
be modified or if an additional or alternative control measure is necessary for any reason,
implementation shall be completed prior to the next anticipated measurable3 storm event. If
implementation prior to the next anticipated measurable storm event is impracticable, then additional
or alternative control measures shall be implemented as soon as practicable, but no later than seven
days after discovery or a longer period as established by the VSMP authority.
• Information on required inspections is provided in this SWPPP in Section 5.0.
3.1 SAFETY FENCE
3.1.1 General
Unless otherwise indicated, all vegetative and structural erosion and sediment control practices shall
be constructed and maintained according to minimum standards and specifications of the VESCH,
Third Edition, 1992, or latest edition
3.1.2 Specific Safety Controls
3.1.2.1 Safety Fence
Safety Control Description
Safety Fence will be installed on the site in the locations shown in the plans in accordance with Std. &
Spec. 3.01.
• Safety Fence has the purpose to prohibit the undesirable use of an erosion control measure by the
public.
3 Note: Measurable storm event means a rainfall event producing 0.25 inches of rain or greater over 24
hours.
3.16
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
EROSION AND SEDIMENT CONTROLS
Maintenance Requirements
Safety Fence shall be checked regularly for weather -related or other damage and any necessary
repairs must be made immediately.
• Care should be taken to secure all access points (gates) at the end of each working day. All locking
devices must be repaired or replaced as necessary.
3.2 SEDIMENT TRACK -OUT (ROAD STABILIZATION)
3.2.1 General
• Unless otherwise indicated, all vegetative and structural erosion and sediment control practices shall
be constructed and maintained according to minimum standards and specifications of the VESCH,
Third Edition, 1992, or latest edition.
3.2.2 Specific Track -Out Controls
3.2.2.1 Temporary Stone Construction Entrance
Temporary Stone Construction Entrance Control Description
• Temporary stone construction entrance will be installed on the site in the locations shown in the plans
in accordance with Std. & Spec. 3.02.
• Temporary stone construction entrance has the purpose to reduce the amount of mud transported
onto paved public roads by motor vehicles or runoff.
• The existing gravel construction access roadway shall be maintained for the duration of the
construction and stabilization. The contractor shall wash down all construction equipment/vehicles
before leaving the project site. If sediment tracking occurs a construction entrance shall be
employed.
Maintenance Reauirements
• In general, all erosion and sediment control measures shall be checked daily and after each
significant rainfall event by the contractor.
• The entrance shall be maintained in a condition which will prevent tracking or flow of mud onto public
rights -of -way. This may require periodically topdressing the entrance with additional stone or
washing the existing stone. Timber mat construction entrances may be substituted per plan to reduce
disturbance.
• All control measures must be properly maintained in effective operating condition in accordance with
good engineering practices and, where applicable, manufacturer specifications. If a site inspection
required by Part II F (of the CGP) identifies a control measure that is not operating effectively,
corrective action(s) shall be completed as soon as practicable, but no later than seven days after
discovery or a longer period as established by the VSMP authority, to maintain the continued
effectiveness of the control measures.
E 3.17
STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
EROSION AND SEDIMENT CONTROLS
3.2.2.2 Construction Road Stabilization
Construction Road Stabilization Control Description
• Temporary construction road stabilization shall be installed on the site in locations as shown on the
plans in accordance with Std. & Spec. 3.03.
• Construction road stabilization reduces the erosion of temporary roadbeds by construction traffic
during wet weather and reduces the erosion and subsequent regarding of permanent roadbed
between the time of initial grading and final stabilization.
3.3 SEDIMENT BARRIERS (PERIMETER CONTROLS AND INLET
PROTECTION)
3.3.1 General
Unless otherwise indicated, all vegetative and structural erosion and sediment control practices shall
be constructed and maintained according to minimum standards and specifications of the VESCH,
Third Edition, 1992, or latest edition.
3.3.2 Maintenance Requirements
• In general, all erosion and sediment control measures shall be checked daily and after each
significant rainfall event by the contractor.
• Both, temporary and permanent roads and parking areas may require periodic tip dressing with new
gravel. Seeded areas adjacent to the roads and parking areas should be checked periodically to
ensure that a vigorous stand of vegetation is maintained. Roadside ditches and other drainage
structures should be checked regularly to ensure that they do not become clogged with silt or other
debris.
• All control measures must be properly maintained in effective operating condition in accordance with
good engineering practices and, where applicable, manufacturer specifications. If a site inspection
required by Part II F (of the CGP) identifies a control measure that is not operating effectively,
corrective action(s) shall be completed as soon as practicable, but no later than seven days after
discovery or a longer period.
3.3.3 Specific Sediment Barrier Controls
3.3.3.1 Silt Fence/Super Silt Fence
Silt Fence/Super Silt Fence Control Description
Silt fence shall be installed on the site in locations as shown on the plans in accordance with Std. &
Spec. 3.05.
3.18
STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
EROSION AND SEDIMENT CONTROLS
• Silt fence is installed in order to intercept and detain small amounts of sediment from the disturbed
areas during construction operations, and to decrease the velocity of sheet flows and low to moderate
level channel flows.
Maintenance Requirements
• In general, all erosion and sediment control measures shall be checked daily and after each
significant rainfall event by the contractor.
Silt fences shall be inspected immediately after each rainfall and at least daily during prolonged
rainfall. Any required repairs shall be made immediately. Sediment deposits should be removed
after each storm event and when deposits reach approximately one-half the height of the barrier. Any
sediment deposits remaining in place after the silt fence is no longer required shall be dressed to
conform to the existing grade, prepared, and seeded. Close attention shall be paid to repair
damaged silt fence resulting from end runs and undercutting. Should the fabric decompose or
become ineffective, the fabric shall be replaced promptly.
3.3.3.2 Culvert Inlet Protection
Culvert Inlet Control Description
• Culvert Inlet Protection shall be installed on the site in the locations as shown on the plans in
accordance with the Std. R Spec. 3.08.
Culvert Inlet Protection is installed in order to prevent sediment from entering, accumulating in and
being transferred by a culvert and associated drainage system prior to permanent stabilization of a
disturbed area.
Culvert Inlet Protection provides erosion control at culvert inlets during the phase of a project where
elevation and drainage patterns change, causing original control measures to be ineffective or in
need of removal.
Maintenance Requirements
• In general, all erosion and sediment control measures shall be checked daily and after each
significant rainfall event by the contractor.
• Culvert Inlet Protection shall be inspected after each rain and repairs made as needed. Aggregate
shall be replaced or cleaned when inspection reveals that clogged voids are causing ponding
problems which interfere with on -site construction. Sediment shall be removed and the impoundment
restored to its original dimensions when sediment has accumulated to one-half the design depth.
Removed sediment shall be deposited in a suitable area and in such a manner that it will not erode
and cause sedimentation problems. Temporary structures shall be removed when they have served
their useful purpose, but not before the upslope area has been permanently stabilized.
3.19
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
EROSION AND SEDIMENT CONTROLS
3.4 WATERWAY AND OUTLET PROTECTION
3.4.1 General
Unless otherwise indicated, all vegetative and structural erosion and sediment control practices shall
be constructed and maintained according to minimum standards and specifications of the VESCH,
Third Edition, 1992, or latest edition.
3.4.2 Specific Waterway and Outlet Protection Controls
3.4.2.1 Outlet Protection
Outlet Protection Control Description
Culvert Outlet Protection will be installed at the project site at locations as shown on the plans in
accordance with Std. & Spec. 3.18.
Culvert Outlet Protection is installed to prevent scour at stormwater outlets, to protect the outlet
structure, and to minimize the potential for downstream erosion by reducing the velocity and energy
of concentrated stormwater flows.
Maintenance Requirements
• In general, all erosion and sediment control measures shall be checked daily and after each
significant rainfall event by the contractor.
3.4.2.2 Rock Check Dam
Stormwater Conveyance Channel Control Description
Check dams will be installed at the project site at locations as shown on the plans in accordance with
Std. &Spec 3.20.
Maintenance Requirements
• In general, all erosion and sediment control measures shall be checked daily and after each
significant rainfall event by the contractor.
Once a riprap installation has been completed, it should require very little maintenance. It should
however, be inspected periodically to determine if high flows have caused scour beneath the riprap or
filter fabric or dislodged any of the stone. Care must be taken to properly control sediment -laden
construction runoff which may drain to the point of the new installation. If repairs are needed, they
should be accomplished immediately.
• All control measures must be properly maintained in effective operating condition in accordance with
good engineering practices and, where applicable, manufacturer specifications. If a site inspection
required by Part II F (of the CGP) identifies a control measure that is not operating effectively,
corrective action(s) shall be completed as soon as practicable, but no later than seven days after
discovery or a longer period as established by the VSMP authority, to maintain the continued
effectiveness of the control measures.
3.20
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
EROSION AND SEDIMENT CONTROLS
3.5 STREAM PROTECTION
3.5.1 General
• Unless otherwise indicated, all vegetative and structural erosion and sediment control practices shall
be constructed and maintained according to minimum standards and specifications of the VESCH,
Third Edition, 1992, or latest edition.
3.5.2 Temporary Vehicular Stream Crossing
Temporary Vehicular Stream Crossing Control Description
• Temporary Vehicular Stream Crossing will be installed at the project site at locations as shown on the
plans in accordance with Std. & Spec. 3.24.
• Temporary Vehicular Stream Crossings are installed to provide a means for construction traffic to
cross flowing streams without damaging the channel or banks and to keep sediment generated by
construction traffic out of the stream.
Maintenance Requirements
• In general, all erosion and sediment control measures shall be checked daily and after each
significant rainfall event by the contractor.
3.5.3 Dewatering Structure
Dewaterinq Practice Description
• A pump around diversion or similar acceptable technology for discharging water form dewatering
activities will be installed to filter sediment -laden water prior to being discharged offsite.
3.6 SITE PREPARATION FOR VEGETATION ESTABLISHMENT, SOIL
COMPACTION, STOCKPILING
3.6.1 General
• Unless otherwise indicated, all vegetative and structural erosion and sediment control practices shall
be constructed and maintained according to minimum standards and specifications of the VESCH,
Third Edition, 1992, or latest edition.
3.6.2 Specific Site Preparation For Vegetation Establishment, Soil Compaction,
Stockpiling
3.6.2.1 Soil Compaction Controls
Soil Compaction Control Description
• Areas to remain undisturbed are shown on the plans based on the limits of disturbance.
3.21
STORMINATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
EROSION AND SEDIMENT CONTROLS
Maintenance Requirements
• In general, all erosion and sediment control measures shall be checked daily and after each
significant rainfall event by the contractor.
3.6.2.2 Topsoiling
Topsoil Control Description
• Excavated topsoil will be reapplied to area being planted after construction to provide a suitable
growth medium for final site stabilization with vegetation.
Maintenance Requirements
• In general, all erosion and sediment control measures shall be checked daily and after each
significant rainfall event by the contractor.
3.7 GRASS ESTABLISHMENT, SITE STABILIZATION
3.7.1 General
Unless otherwise indicated, all vegetative and structural erosion and sediment control practices shall
be constructed and maintained according to minimum standards and specifications of the VESCH,
Third Edition, 1992, or latest edition.
3.7.2 Site Stabilization Practice 1
® Vegetative ❑ Non -Vegetative
® Temporary ❑ Permanent
• Temporary soil stabilization measures include vegetative establishment, mulching, and the early
application of crushed stone base material on areas to be paved.
3.7.2.1 Temporary Seeding
® Vegetative ❑ Non -Vegetative
® Temporary ❑ Permanent
Description of Practice
• Temporary seeding shall be installed at the site at the locations shown in the plans in accordance
with Std. & Spec. 3.31.
• Stabilization of disturbed areas will be initiated immediately whenever any clearing, grading,
excavating, or other land -disturbing activities have permanently ceased on any portion of the site, or
temporarily ceased on any portion of the site and will not resume for a period exceeding 14 days.
Immediately means as soon as practicable, but no later than the end of the next business day,
following the day when the land -disturbing activities have temporarily or permanently ceased.
Immediately is used in the context of the CGP to define the deadline for initiating stabilization
measures.
E 3.22
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
EROSION AND SEDIMENT CONTROLS
• As outlined in Section 2.3 of this SWPPP and in Part 1.B.4.1b. of the CGP, permanent or temporary soil
stabilization shall be applied to denuded areas within seven days after final grade is reached on any
portion of the site.
Maintenance Requirements
• Erosion and sediment control measures shall be maintained continuously, relocated when and as
necessary, and shall be checked after every significant rainfall. Seeded areas shall be checked
regularly and shall be watered, fertilized, reseeded, and mulched as necessary to obtain a dense
stand of grass.
• All control measures must be properly maintained in effective operating condition in accordance with
good engineering practices and, where applicable, manufacturer specifications. If a site inspection
required by Part II F (of the CGP) identifies a control measure that is not operating effectively,
corrective action(s) shall be completed as soon as practicable, but no later than seven days after
discovery or a longer period as established by the VSMP authority, to maintain the continued
effectiveness of the control measures.
3.7.3 Site Stabilization Practice 2
® Vegetative ❑ Non -Vegetative
❑ Temporary ® Permanent
• Permanent stabilization measures for the project include riprap, blanketing and matting, and
permanent seeding.
3.7.3.1 Permanent Seeding
® Vegetative ❑ Non -Vegetative
❑ Temporary ® Permanent
Description of Practice
• Permanent seeding shall be installed at the site in the locations shown in the plans in accordance
with Std. & Spec. 3.32.
• Stabilization of disturbed areas will be initiated immediately whenever any clearing, grading,
excavating, or other land -disturbing activities have permanently ceased on any portion of the site, or
temporarily ceased on any portion of the site and will not resume for a period exceeding 14 days.
Immediately means as soon as practicable, but no later than the end of the next business day,
following the day when the land -disturbing activities have temporarily or permanently ceased.
Immediately is used in the context of the CGP to define the deadline for initiating stabilization
measures.
As outlined in Section 2.3 of this SWPPP and in Part 1.B.4.1b. of the CGP, permanent or temporary soil
stabilization shall be applied to denuded areas within seven days after final grade is reached on any
portion of the site.
• Permanent vegetative cover (stabilization) shall consist of placing topsoil, incorporating lime,
fertilizing, seeding, and mulching to assure a firm stand of vegetation. Irrigation may be required to
3.23
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
EROSION AND SEDIMENT CONTROLS
ensure establishment of vegetative cover. As outlined Section 2.3 of this SWPPP, nutrients shall be
applied in accordance with manufacturer's recommendations or an approved nutrient management
plan and shall not be applied during rainfall events.
Maintenance Requirements
• Erosion and sediment control measures shall be maintained continuously, relocated when and as
necessary, and shall be checked after every significant rainfall. Seeded areas shall be checked
regularly and shall be watered, fertilized, reseeded, and mulched as necessary to obtain a dense
stand of grass.
• All control measures must be properly maintained in effective operating condition in accordance with
good engineering practices and, where applicable, manufacturer specifications. If a site inspection
required by Part II F (of the CGP) identifies a control measure that is not operating effectively,
corrective action(s) shall be completed as soon as practicable, but no later than seven days after
discovery or a longer period as established by the VSMP authority, to maintain the continued
effectiveness of the control measures.
3.8 MULCHES, STEEP SLOPE PROTECTION
3.8.1 Mulches and Steep Slope Protection Practice
3.8.1.1 Mulching
❑ Vegetative ® Non -Vegetative
❑ Temporary ® Permanent
Description of Practice
• Mulch will be applied to areas that require temporary seeding to prevent erosion by protecting the soil
from raindrop impact and reducing velocity of overland flow.
• Mulch will foster the growth of vegetation by increasing available moisture and providing insulation
against extreme heat or cold.
Maintenance Requirements
• In general, all erosion and sediment control measures shall be checked daily and after each
significant rainfall event by the contractor.
3.8.1.2 Soil Stabilization Blankets and Matting
❑ Vegetative ® Non -Vegetative
❑ Temporary ® Permanent
Blankets and Matting Control Description
Stabilization matting will be installed at the project site at locations as shown on the plans.
• Installation shall be in accordance with Std. & Spec. 3.36 Soil Stabilization Blankets and Matting and
manufacturer's instructions.
E 3.24
STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
EROSION AND SEDIMENT CONTROLS
• All slopes steeper than 3H:1 V shall require the use of erosion control blankets and matting to aid in
the establishment of a vegetative cover.
Maintenance Requirements
• Erosion and sediment control measures shall be maintained continuously, relocated when and as
necessary, and shall be checked after every significant rainfall. Seeded areas shall be checked
regularly and shall be watered, fertilized, reseeded, and mulched as necessary to obtain a dense
stand of grass.
• All control measures must be properly maintained in effective operating condition in accordance with
good engineering practices and, where applicable, manufacturer specifications. If a site inspection
required by Part II F (of the CGP) identifies a control measure that is not operating effectively,
corrective action(s) shall be completed as soon as practicable, but no later than seven days after
discovery or a longer period as established by the VSMP authority, to maintain the continued
effectiveness of the control measures.
3.9 OTHER VEGETATION CONTROLS
3.9.1 Tree Protection
Perimeter Control Description
• Tree Protection will be installed at the project site at locations as shown on the plans in accordance
with Std. & Spec. 3.38.
• Tree Protection is installed to ensure the survival of desirable trees where they will be effective for
erosion and sediment control, watershed protection, landscape beautification, dust and pollution
control, noise reduction, shade and other environmental benefits while the land is being converted
from forest to urban -type uses.
Maintenance Requirements
• Tree Protection shall be checked regularly for weather -related or other damage and any necessary
repairs must be made immediately.
3.10 MINIMIZE DUST
3.10.1 General
• Unless otherwise indicated, all vegetative and structural erosion and sediment control practices shall
be constructed and maintained according to minimum standards and specifications of the VESCH,
Third Edition, 1992, or latest edition.
3.25
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
EROSION AND SEDIMENT CONTROLS
3.10.2 Specific Dust Controls
3.10.2.1 Dust Control
Dust Control Description
• Dust control shall be applied throughout construction process if needed and approved by the County
in accordance with Std. & Spec. 3.39.
• Dust control serves to prevent surface and air movement of dust from exposed soil surfaces and
reduce the presence of airborne substances which may present health hazards, traffic safety
problems or harm to animal or plant life.
Maintenance Requirements
• Dust control shall be applied throughout construction process if needed.
• In general, all erosion and sediment control measures shall be checked daily and after each
significant rainfall event by the contractor.
• All control measures must be properly maintained in effective operating condition in accordance with
good engineering practices and, where applicable, manufacturer specifications. If a site inspection
required by Part II F (of the CGP) identifies a control measure that is not operating effectively,
corrective action(s) shall be completed as soon as practicable, but no later than seven days after
discovery or a longer period as established by the VSMP authority, to maintain the continued
effectiveness of the control measures.
3.11 CHEMICAL TREATMENT
3.11.1 Soil Types
• List all the soil types (including soil types expected to be found in fill material) that are expected to be
exposed during construction and that will be discharged to locations where chemicals will be applied:
N/A
3.11.2 Treatment Chemicals
• List all treatment chemicals that will be used at the site and explain why these chemicals are suited to
the soil characteristics: N/A
• Describe the dosage of all treatment chemicals you will use at the site or the methodology you will
use to determine dosage: N/A
• Provide information from any applicable Material Safety Data Sheets (MSDS): N/A
• Describe how each of the chemicals will stored: N/A
• Include references to applicable state or local requirements affecting the use of treatment chemicals,
and copies of applicable manufacturer's specifications regarding the use of your specific treatment
chemicals and/or chemical treatment systems: N/A
3.26
STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
EROSION AND SEDIMENT CONTROLS
3.11.2.1 Special Controls for Cationic Treatment Chemicals (if applicable)
If you have been authorized by your applicable Regional Office to use cationic treatment chemicals,
include the official EPA authorization letter or other communication, and identify the specific controls and
implementation procedures you are required to implement to ensure that your use of cationic treatment
chemicals will not lead to a violation of water quality standards: N/A
3.11.3 Schematic Drawings of Stormwater Controls/Chemical Treatment Systems
Provide schematic drawings of any chemically -enhanced stormwater controls or chemical treatment
systems to be used for application of treatment chemicals: N/A
3.11.4 Training
Describe the training that personnel who handle and apply chemicals have received prior to permit
coverage, or will receive prior to the use of treatment chemicals: N/A
M
3.27
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
POLLUTION PREVENTION STANDARDS
4.., 7'^' I'ITION PREVENTION STANDARDS
4.1 POTENTIAL SOURCES OF POLLUTION
Soil disturbing activities associated with the construction of the Innisfree Stream Mitigation Bank Phase 2
project in Albermarle County, Virginia, will occur that could potentially affect the quality of stormwater
runoff. The proper E&S measures will be installed prior to construction to manage stormwater and
sediment.
The information below identifies potential pollution sources at the construction site.
The location of potential pollutant sources should be documented and updated on the plans for the
project.
4.2 CONSTRUCTION SITE POLLUTANTS
Table 5 — Construction Site Pollutants
Pollutants or Pollutant Constituents
(that
could be discharged if
exposed to
stormwater
d
C
D
p
Cl
Pollutant -Generating Activity
Y a
d
m
c
d
w v
m e
an d
o$
V A
L
E
'a
IL
N
rL
2
C'
''o .-
O=
5 y
•-
♦�
U>
d
N
Z
>
m
Y d
m
t o
ay
;
u>
N 00
Lt
O
=
R=
125
m
O V
Clearing, grading, excavating
✓
✓
✓
✓
Vehicle/equipment fueling
✓
✓
✓
✓
Sanitary waste
✓
✓
✓
✓
Concrete washout
Solid waste disposal
✓
✓
✓
Used oil storage
✓
✓
✓
Vehicle washing
✓
✓
✓
✓
✓
Vehicle/equipment maintenance
✓
✓
✓
✓
Site stabilization/Landscaping
✓
✓
✓
✓
✓
Material delivery and storage
✓
✓
✓
Paving
Structure construction, painting,
cleaning
Demolition and debris disposal
Dewatering operations
✓
✓
✓
✓
E
4.28
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
POLLUTION PREVENTION STANDARDS
4.3 POLICIES AND PROCEDURES
The operator should assure that employees are aware of all applicable wastes, including wash water,
disposal practices, and applicable disposal locations of such wastes, in order to comply with the
conditions of the CGP.
The DEQ recommends that subcontractor certifications should be obtained. These signed certifications
should be kept in this SWPPP in Appendix H.
Personnel should be educated in spill prevention, area of possible pollution, and spill response
procedures.
4.4 SPILL PREVENTION AND RESPONSE
The following practices will be followed for spill prevention and cleanup:
• Products will be kept in original containers unless they are not resealable.
• Original specimen labels and materials safety data sheets will be kept on file; they contain important
product information.
• If surplus product must be disposed of, manufacturers' and/or local and State recommended methods
for proper disposal will be followed.
• Manufacturers' recommended methods for spill cleanup will be clearly posted and site personnel will
be made aware of the procedures and the location of the information and cleanup supplies.
• Materials and equipment necessary for spill cleanup will be kept in the material storage area on -site.
Equipment and materials may include but not be limited to cleanup kits, brooms, dust pans, mops,
rags, gloves, goggles, dirt to contain spill, containment boom, absorbent material (e.g. hay, kitty litter,
sand, sawdust) and plastic and metal trash.
• All spills will be cleaned up immediately after discovery.
• In the event of a spill of a hazardous substance, the spill will be immediately contained and the spill
area will be kept well ventilated. Personnel will wear appropriate protective clothing to prevent injury
from contact with a hazardous substance during cleanup operation.
• Spills of toxic or hazardous material will be reported to the appropriate State or local government
agency, as required by regulatory standards.
• The contractor or his representative will be responsible for spill prevention and coordination.
• The spill prevention and control procedures will be implemented once construction begins on -site.
• When a spill occurs, the following individuals/agencies shall be considered for notification:
4.29
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
POLLUTION PREVENTION STANDARDS
Table 6 - Spill Notification Table
Person or Agency
Telephone Number
Innisfree Stream Mitigation Bank, LLC Go Peter Traverse
434-823-5400
VA Department of Environmental Quality (DEQ) Pollution Response Program
1-800-468-8892
VA Department of Emergency Management (DEM)
1-800-468-8892 (24 hour #)
VA Department of Environmental Quality (DEQ)
757-518-2000
Local Emergency Response
911 (24 hour #)
4.5 SPILL REPORTING
4.5.1 Reports of Unauthorized Discharges
• Any operator who discharges or causes or allows a discharge of sewage, industrial waste, other
wastes or any noxious or deleterious substance or a hazardous substance or oil in an amount equal
to or in excess of a reportable quantity established under either 40 CFR Part 110, 40 CFR Part 117,
40 CFR Part 302, or § 62.1-44.34:19 of the Code of Virginia that occurs during a 24-hour period into
or upon surface waters or who discharges or causes or allows a discharge that may reasonably be
expected to enter surface waters, shall notify the Department of Environmental Quality of the
discharge immediately upon discovery of the discharge, but in no case later than within 24 hours after
said discovery. A written report of the unauthorized discharge shall be submitted to the department
and the VSMP authority within five days of discovery of the discharge. The written report shall
contain:
(a) A description of the nature and location of the discharge;
(b) The cause of the discharge;
(c) The date on which the discharge occurred;
(d) The length of time that the discharge continued;
(e) The volume of the discharge;
(f) If the discharge is continuing, how long it is expected to continue;
(g) If the discharge is continuing, what the expected total volume of the discharge will be; and
(h) Any steps planned or taken to reduce, eliminate and prevent a recurrence of the present
discharge or any future discharges not authorized by the general permit.
• Discharges reportable to the department and the VSMP authority under the immediate reporting
requirements of other regulations are exempted from this requirement.
• A Spill Report Form is provided in Appendix L of the SWPPP.
4.30
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
POLLUTION PREVENTION STANDARDS
4.5.2 Reports of Unusual or Extraordinary Discharges.
• If any unusual or extraordinary discharge including a "bypass" or "upset', as defined in the permit,
should occur from a facility and the discharge enters or could be expected to enter surface waters,
the operator shall promptly notify, in no case later than within 24 hours, the department and the
VSMP authority by telephone after the discovery of the discharge. This notification shall provide all
available details of the incident, including any adverse effects on aquatic life and the known number
of fish killed. The operator shall reduce the report to writing and shall submit it to the department and
the VSMP authority within five days of discovery of the discharge in accordance with Section III 12 in
the permit. Unusual and extraordinary discharges include but are not limited to any discharge
resulting from:
(a) Unusual spillage of materials resulting directly or indirectly from processing operations;
(b) Breakdown of processing or accessory equipment;
(c) Failure or taking out of service of some or all of the facilities; and
(d) Flooding or other acts of nature.
4.5.3 Reports of Noncompliance.
(1) The operator shall report any noncompliance which may adversely affect surface waters or may
endanger public health.
(2) An oral report to the department and the VSMP authority shall be provided within 24 hours from the
time the operator becomes aware of the circumstances. The following shall be included as
information that shall be reported within 24 hours under this subdivision:
(a) Any unanticipated bypass; and
(b) Any upset that causes a discharge to surface waters.
(3) A written report shall be submitted within five days and shall contain:
(a) A description of the noncompliance and its cause;
(b) The period of noncompliance, including exact dates and times, and if the noncompliance has not
been corrected, the anticipated time it is expected to continue; and
(c) Steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance.
(4) The department may waive the written report on a case -by -case basis for reports of noncompliance
under Section III I in the permit if the oral report has been received within 24 hours and no adverse
impact on surface waters has been reported.
(5) The operator shall report all instances of noncompliance not reported under Section III 1 1 or 2 (in the
permit) in writing as part of the SWPPP. The reports shall contain the information listed in Section 1111
2 (in the permit).
(6) NOTE: The reports required in Section III G, H and I (in the permit) shall be made to the department
and the VSMP authority. Reports may be made by telephone, email, or by fax. For reports outside
4.31
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
POLLUTION PREVENTION STANDARDS
normal working hours, leaving a recorded message shall fulfill the immediate reporting requirement.
For emergencies, the Virginia Department of Emergency Management maintains a 24-hour telephone
service at 1-800-468-8892.
(7) Where the operator becomes aware of a failure to submit any relevant facts, or submittal of incorrect
information in any report, including a registration statement, to the department or the VSMP authority,
the operator shall promptly submit such facts or correct information.
4.6 FUELING AND MAINTENANCE OF EQUIPMENT OR VEHICLES
4.6.1 General
• The contractor shall document the locations of all vehicle fueling areas in the SWPPP once identified.
These locations can be identified on the Erosion and Sediment Control Plans provided in Appendix B
of the SWPPP. As the vehicle fueling facilities move throughout the project, areas need to be shown,
dated and signed. If vehicle fueling will not be part of the project, a written statement indicating that
"no on -site vehicle fueling will be part of this project" should be added on the plans or included in the
SWPPP Updates section provided in Appendix K.
• All on -site vehicles will be monitored for leaks and receive regular preventive maintenance to reduce
the chance of leakage.
• It is recommended that, if practicable, all refueling, repair and changing of equipment and vehicle
fluids shall be conducted in a manner to reduce the potential for contamination of on -site resources.
Care should be taken, where feasible, to avoid activities within ±50 feet of storm drains, wetlands,
streams, water bodies, tree preservation areas or any other environmentally sensitive areas.
• Secondary containment and spill response kits should be provided onsite.
• These pollution prevention practices and procedures should be implemented to prevent the discharge
of spilled and leaked fuels and chemicals from vehicle fueling and maintenance activities (e.g.,
providing secondary containment such as spill berms, decks, spill containment pallets, providing
cover where appropriate, and having spill kits readily available).
• Petroleum products will be stored in tightly sealed containers which are clearly labeled.
• The contractor will regularly inspect the site to insure proper disposal methods of used antifreeze,
oils, filters, and other hazardous materials are followed.
4.7 WASHING OF EQUIPMENT AND VEHICLES
4.7.1 General
• Vehicle washing should only take place when soaps, solvents, or detergents have not been used.
Construction vehicle washing will only occur at approved locations in accordance with State and local
regulations.
E 4.32
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
POLLUTION PREVENTION STANDARDS
• Tire washing may be necessary as part of the site's construction entrance in order to minimize the
transport of sediment by vehicular traffic onto a paved surface. If washing is necessary, provisions
must be made to intercept the wash water and trap the sediment so it can be collected and stabilized.
Wash water must be carried away from the construction entrance to an approved settling area to
remove sediment.
Pollution prevention practices and procedures should be implemented that will minimize the
discharge of pollutants from vehicle and equipment washing, wheel wash water, and other types of
washing (e.g., locating activities away from surface waters and stormwater inlets or conveyance and
directing wash waters to sediment basins or traps, using filtration devices such as filter bags or sand
filters, or using similarly effective controls) should be minimized and the wash water has been filtered,
settled, or similarly treated prior to discharge.
• Physical separation should be provided between surface waters and inlets.
4.8 STORAGE, HANDLING, AND DISPOSAL OF CONSTRUCTION
PRODUCTS, MATERIALS, AND WASTES
4.8.1 Building Products
(Note: Examples include asphalt sealants, copper flashing, roofing materials, adhesives, concrete
admixtures.)
4.8.1.1 General
• All waste materials will be collected and stored in a proper receptacle in accordance with all local and
State solid waste management regulations. All trash and construction debris from the site will be
deposited in dumpsters. The contractor shall document the locations of all dumpsters in the SWPPP
once determined in the field. These locations will be annotated on the Erosion and Sediment Control
Plans provided in Appendix B of the SWPPP. The trash will be hauled to an appropriate waste
disposal site. No construction waste materials will be buried on -site. All project personnel will be
instructed regarding the correct procedure for waste disposal.
• Products, where possible, will be kept in their original containers with the original manufacturer's
label.
• Whenever possible, all of a product will be used up before disposing of the container.
• Manufacturers' recommendations for proper use and disposal will be followed.
Store and handle materials to prevent spills by tightly sealing containers, making sure all containers
are clearly labeled and neatly and securely stacked.
• Products will be kept in original containers unless they are not resealable.
• Original specimen labels and materials safety data sheets will be kept on file; they contain important
product information.
4.33
STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
POLLUTION PREVENTION STANDARDS
• If surplus product must be disposed of, manufacturers' and/or local and State recommended methods
for proper disposal will be followed.
• All materials stored on -site will be stored in a neat, orderly manner in their appropriate containers.
Materials which have the potential for contaminating runoff during storm events will be stored in their
appropriate watertight containers, stored under a canopy, tarpaulin, shrink wrapped or otherwise
precluded from direct exposure to precipitation.
• Locate materials storage areas outside of stormwater flowpaths and floodplains and avoid placement
near drop inlets.
4.8.2 Pesticides, Herbicides, Insecticides, Fertilizers, and Landscape Materials
4.8.2.1 General
• Products, where possible, will be kept in their original containers with the original manufacturer's
label.
• Whenever possible, all of a product will be used up before disposing of the container.
• Manufacturers' recommendations for proper use and disposal will be followed.
Store and handle materials to prevent spills by tightly sealing containers, making sure all containers
are clearly labeled and neatly and securely stacked.
• Products will be kept in original containers unless they are not resealable.
• Original specimen labels and materials safety data sheets will be kept on file; they contain important
product information.
• If surplus product must be disposed of, manufacturers' and/or local and State recommended methods
for proper disposal will be followed.
• All materials stored on -site will be stored in a neat, orderly manner in their appropriate containers.
Materials which have the potential for contaminating runoff during storm events will be stored in their
appropriate watertight containers, stored under a canopy, tarpaulin, shrink wrapped or otherwise
precluded from direct exposure to precipitation.
4.8.3 Diesel Fuel, Oil, Hydraulic Fluids, Other Petroleum Products, and Other
Chemicals
4.8.3.1 General
Chemical or petroleum products will not be mixed with one another unless recommended by the
manufacturer.
• All on -site equipment will be checked for leaks and receive regular preventive maintenance.
4.34
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
POLLUTION PREVENTION STANDARDS
4.8.4 Hazardous or Toxic Waste
(Note: Examples include paints, solvents, petroleum -based products, wood preservatives, additives,
curing compounds, acids.)
4.8.4.1 General
• All containers will be tightly sealed and stored when not required for use. Excess paint will be
properly disposed of according to manufacturers' instructions or State and local regulations.
• All hazardous waste materials will be disposed of in the manner specified by the manufacturer and as
required by local or State regulation. Site personnel will be instructed in these practices.
• Empty containers that may contain chemical residues shall be disposed of in accordance with State
and local regulations.
4.8.5 Construction and Domestic Waste
(Note: Examples include packaging materials, scrap construction materials, masonry products, timber,
pipe and electrical cuttings, plastics, styrofoam, concrete, and other trash or building materials.)
4.8.5.1 General
• All waste materials will be collected and stored in a proper receptacle in accordance with all local and
State solid waste management regulations. All trash and construction debris from the site will be
deposited in dumpsters. The trash will be hauled to an appropriate waste disposal site. No
construction waste materials will be buried on -site. All project personnel will be instructed regarding
the correct procedure for waste disposal.
• Products, where possible, will be kept in their original containers with the original manufacturer's
label.
• Whenever possible, all of a product will be used up before disposing of the container.
• Manufacturers' recommendations for proper use and disposal will be followed.
• Store and handle materials to prevent spills by tightly sealing containers, making sure all containers
are clearly labeled and neatly and securely stacked.
• Products will be kept in original containers unless they are not resealable.
• Original specimen labels and materials safety data sheets will be kept on file; they contain important
product information.
• If surplus product must be disposed of, manufacturers' and/or local and State recommended methods
for proper disposal will be followed.
• All materials stored on -site will be stored in a neat, orderly manner in their appropriate containers.
Materials which have the potential for contaminating runoff during storm events will be stored in their
appropriate watertight containers, stored under a canopy, tarpaulin, shrink wrapped or otherwise
precluded from direct exposure to precipitation.
4.35
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
POLLUTION PREVENTION STANDARDS
4.8.6 Sanitary Waste
4.8.6.1 General
Portable sanitary units will be utilized at various locations along the project site. The contractor shall
document the locations of all portable sanitary units in the SWPPP once determined in the field.
These locations will be annotated on the Erosion and Sediment Control Plans provided in Appendix B
of the SWPPP. All sanitary waste will be collected from the portable units as required by local and
State regulation.
• Portable sanitary units should not be located in or adjacent to streams, drop inlets, flowpaths and
floodplains.
d R 7 FYress Concrete
4.8.7.1 General
• Vehicles and equipment used to handle concrete will be washed (see Section 4.8 Washing of
Concrete or Other Materials).
• Vehicles will be inspected prior to leaving the site to ensure that concrete is not being tracked outside
of project site limits.
Concrete wastes will be allowed to harden, the concrete will be broken up, removed, and disposed
with other construction waste.
4.8.8 Exposure of Waste Materials to Precipitation
4.8.8.1 General
• Receptacles for waste materials that are not watertight or may overflow during a precipitation event
may result in the discharge of pollutants. This may include disposal areas for hazardous waste,
construction waste, and domestic waste, such as dumpsters and collection areas.
• Where waste materials exposed to precipitation may result in the discharge of pollutants, cover will be
provided for the waste materials during precipitation events and at the end of every workday.
4.8.9 Other Pollution Prevention Practices
4.8.9.1 General
• All waste materials will be collected and stored in a proper receptacle in accordance with all local and
State solid waste management regulations.
4.36
STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
INSPECTION AND CORRECTIVE ACTION
INSPECTION AND CORRECTIVE ACTION
5.1 INSPECTION PERSONNEL AND PROCEDURES
5.1.1 Personnel Responsible for Inspections
Inspections will be performed by qualified personnel identified by the operator in the SWPPP.
The operator is responsible for ensuring that qualified personnel conduct the inspection.
• Qualified personnel means a person knowledgeable in the principles and practices of erosion and
sediment and stormwater management controls who possesses the skills to assess conditions at the
construction site for the operator that could impact stormwater quality and quantity and to assess the
effectiveness of any sediment and erosion control measures or stormwater management facilities
selected to control the quality and quantity of stormwater discharges from the construction activity.
The name, phone number, and qualifications of the qualified personnel conducting inspections
required by the CGP will be provided either on the inspection forms for the project or provided
separately in Appendix E.
• Reports summarizing each inspection shall be incorporated by reference and retained as part of this
SWPPP.
A copy of an example inspection report is provided in Appendix E of this SWPPP.
5.2 INSPECTION SCHEDULE
5.2.1 Surface Waters Not Impaired, TMDL, nor Exceptional
For construction activities that discharge to a surface water not identified as impaired or having an
approved TMDL or as exceptional, the following inspection schedule requirement apply:
❑ (1) At least once every five (5) business days or
❑ (2) At least once every ten (10) business days and no later than 24 hours following a measurable
storm event. In the event that a measurable storm event occurs when there are more than 24
hours between business days, the inspection shall be conducted on the next business day; and
5.2.2 Impaired, TMDL, or Exceptional Surface Waters
For construction activities that discharge to a surface water identified as impaired or having an approved
TMDL or as exceptional, the following inspection schedule requirement apply:
■ (1) At least once every four (4) business days or
M
5.37
STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
INSPECTION AND CORRECTIVE ACTION
(2) At least once every five (5) business days and no later than 24 hours following a measurable
storm event. In the event that a measurable storm event occurs when there are more than 24
hours between business days, the inspection shall be conducted on the next business day; and
Representative inspections used by utility line installation, pipeline construction, or other similar linear
construction activities are not allowed.
Representative inspections may be utilized for utility line installation, pipeline construction, or other similar
linear construction activities provided that:
(1) Temporary or permanent soil stabilization has been installed and vehicle access may compromise the
temporary or permanent soil stabilization and potentially cause additional land disturbance increasing
the potential for erosion;
(2) Inspections occur on the same frequency as other construction activities;
(3) Control measures are inspected along the construction site 0.25 miles above and below each access
point (i.e., where a roadway, undisturbed right-of-way, or other similar feature intersects the
construction activity and access does not compromise temporary or permanent soil stabilization); and
(4) Inspection locations are provided in the report required by Part II F (of the CGP)
Where areas have been temporarily stabilized or land -disturbing activities will be suspended due to
continuous frozen ground conditions and stormwater discharges are unlikely, the inspection frequency
may be reduced to once per month. If weather conditions (such as above freezing temperatures or rain
or snow events) make discharges likely, the operator shall immediately resume the regular inspection
frequency.
If adverse weather causes the safety of the inspection personnel to be in jeopardy, the inspection may be
delayed until the next business day on which it is safe to perform the inspection. Any time inspections are
delayed due to adverse weather conditions, evidence of the adverse weather conditions shall be included
in the SWPPP with the date(s) of occurrence.
5.2.3 Inspection Requirements
As part of the inspection, the qualified personnel shall:
(1) Record the date and time of the inspection and when applicable the date and rainfall amount of the
last measurable storm event;
(2) Record the information and a description of any discharges occurring at the time of the inspection or
evidence of discharges occurring prior to the inspection;
(3) Record any land -disturbing activities that have occurred outside of the approved erosion and
sediment control plan;
(4) Inspect the following for installation in accordance with the approved erosion and sediment control
plan, identification of any maintenance needs, and evaluation of effectiveness in minimizing sediment
discharge, including whether the control has been inappropriately or incorrectly used:
5.38
STORMWATER POLLUTION PREVENTION PLAN — INNISFREE STREAM MITIGATION BANK
INSPECTION AND CORRECTIVE ACTION
(a) All perimeter erosion and sediment controls, such as silt fence;
(b) Soil stockpiles, when applicable, and borrow areas for stabilization or sediment trapping
measures;
(c) Completed earthen structures, such as dams, dikes, ditches, and diversions for stabilization and
effective impoundment or flow control;
(d) Cut and fill slopes;
(e) Sediment basins and traps, sediment barriers, and other measures installed to control sediment
discharge from stormwater;
(f) Temporary or permanent channels, flumes, or other slope drain structures installed to convey
concentrated runoff down cut and fill slopes;
(g) Storm inlets that have been made operational to ensure that sediment laden stormwater does not
enter without first being filtered or similarly treated; and
(h) Construction vehicle access routes that intersect or access paved or public roads for minimizing
sediment tracking;
(5) Inspect areas that have reached final grade or that will remain dormant for more than 14 days to
ensure:
(a) Initiation of stabilization activities have occurred immediately, as defined in 9VAC25-880-1;
(b) Stabilization activities have been completed within seven days of reaching grade or stopping
work;
(6) Inspect for evidence that the approved erosion and sediment control plan, "agreement in lieu of a
plan," or erosion and sediment control plan prepared in accordance with department -approved annual
standards and specifications has not been properly implemented. This includes but is not limited to:
(a) Concentrated flows of stormwater in conveyances such as rills, rivulets or channels that have not
been filtered, settled, or similarly treated prior to discharge, or evidence thereof;
(b) Sediment laden or turbid flows of stormwater that have not been filtered or settled to remove
sediments prior to discharge;
(c) Sediment deposition in areas that drain to unprotected stormwater inlets or catch basins that
discharge to surface waters. Inlets and catch basins with failing sediments controls due to
improper installation, lack of maintenance, or inadequate design are considered unprotected;
(d) Sediment deposition on any property (including public and private streets) outside of the
construction activity covered by the general permit;
(e) Required stabilization has not been initiated or completed or is not effective on portions of the
site;
(f) Sediment basins without adequate wet or dry storage volume or sediment basins that allow the
discharge of stormwater from below the surface of the wet storage portion of the basin;
5.39
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
INSPECTION AND CORRECTIVE ACTION
(g) Sediment traps without adequate wet or dry storage or sediment traps that allow the discharge of
stormwater from below the surface of the wet storage portion of the trap; and
(h) Land disturbance or sediment deposition outside of the approved area to be disturbed;
(7) Inspect pollutant generating activities identified in the pollution prevention plan for the proper
implementation, maintenance and effectiveness of the procedures and practices;
(8) Identify any pollutant generating activities not identified in the pollution prevention plan; and
(9) Identify and document the presence of any evidence of the discharge of pollutants prohibited by the
general permit.
5.3 INSPECTION REPORT
Each inspection report shall include the following items:
(1) The date and time of the inspection and when applicable, the date and rainfall amount of the last
measurable storm event;
(2) Summarized findings of the inspection;
(3) The location(s) of prohibited discharges;
(4) The location(s) of control measures that require maintenance;
(5) The location(s) of control measures that failed to operate as designed or proved inadequate or
inappropriate for a particular location;
(6) The location(s) where any evidence identified under Part II F 3 a (7) exists;
(7) The location(s) where any additional control measure is needed;
(8) A list of corrective actions required (including any changes to the SWPPP that are necessary) as a
result of the inspection or to maintain permit compliance;
(9) Documentation of any corrective actions required from a previous inspection that have not been
implemented; and
(10)The date and signature of the qualified personnel and the operator or its duly authorized
representative.
The inspection report shall be included into the SWPPP no later than 4 business days after the inspection
is complete.
The inspection report and any actions taken in accordance with Part II (of the CGP) must be retained by
the operator as part of the SWPPP for at least three years from the date that general permit coverage
expires or is terminated. The inspection report shall identify any incidents of noncompliance. Where an
inspection report does not identify any incidents of noncompliance, the report shall contain a certification
that the construction activity is in compliance with the SWPPP and the general permit. The report shall be
signed in accordance with Part III K of the general permit.
5.40
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
INSPECTION AND CORRECTIVE ACTION
5.3.1 Rainfall Tracking
For the purposes of tracking measurable rain events, the operator will reference a rain gauge accessible
to inspection staff at the project site or at another local site representative of the project location.
A blank precipitation log is provided in Appendix E of this SWPPP if an onsite rain gauge will be used.
If a rain gauge is not used, rainfall tracking will be monitored through either an onsite rain gauge or using
one of the following links:
• http:/Avater.weather.gov/precip/
• http://www.nc-climate.ncsu.edu/cronos/
• http://wv4w.ncdc.noaa.gov/cdo-web/
Reports summarizing each inspection shall be incorporated by reference and retained as part of this
SWPPP.
5.4 CORRECTIVE ACTION
5.4.1 Personnel Responsible for Corrective Actions
• The operator shall implement the corrective action(s) identified as a result of an inspection as soon as
practicable but no later than seven days after discovery or a longer period as approved by the VSMP
authority. If approval of a corrective action by a regulatory authority (e.g., VSMP authority, VESCP
authority, or the department) is necessary, additional control measures shall be implemented to
minimize pollutants in stormwater discharges until such approvals can be obtained.
• The operator may be required to remove accumulated sediment deposits located outside of the
construction activity covered by this general permit as soon as practicable in order to minimize
environmental impacts. The operator shall notify the VSMP authority and the department as well as
obtain all applicable federal, state, and local authorizations, approvals, and permits prior to the
removal of sediments accumulated in surface waters including wetlands.
• The contractor shall be responsible for the installation and maintenance of all erosion and sediment
control practices and for corrective actions.
5.4.2 Corrective Action Forms
Corrective actions are documented within the inspection reports for the project. Copies of the inspection
reports are hereby incorporated by reference as part of this SWPPP and are provided in Appendix E.
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6.0 RECORDKEEPING
6.1 RECORDKEEPING
Information on when major grading activities occur and when construction activities temporarily or
permanently ceases on a portion of the site will be provided on the inspection reports for the project
provided in Appendix E and/or included in the SWPPP updates section in Appendix K or on the grading
and stabilization activities log provided in Appendix G. Inspection reports summarizing each inspection
shall be retained onsite as part of this SWPPP and kept in Appendix E.
• The operator shall retain records of all monitoring information, including all calibration and
maintenance records and all original strip chart recordings for continuous monitoring instrumentation,
copies of all reports required by this general permit, and records of all data used to complete the
registration statement for this general permit, for a period of at least three (3) years from the date of
the sample, measurement, report or request for coverage.
• The inspection report and any actions taken in accordance with Part II (of the CGP) must be retained
by the operator as part of the SWPPP for at least three years from the date that general permit
coverage expires or is terminated. The inspection report shall identify any incidents of
noncompliance. Where an inspection report does not identify any incidents of noncompliance, the
report shall contain a certification that the construction activity is in compliance with the SWPPP and
the general permit. The report shall be signed in accordance with Part III K of the general permit.
6.2 LOG OF CHANGES TO THE SWPPP
• The operator shall amend the SWPPP whenever there is a chance in the design, construction,
operation, or maintenance that has a significant effect on the discharge of pollutants to surface waters
and that has not been previously addressed in the SWPPP.
The SWPPP must be amended if, during inspections or investigations by the operator's qualified
personnel, or by local, state, or federal officials, it is determined that the existing control measures are
ineffective in minimizing pollutants in discharges from the construction activity. Revisions to the
SWPPP shall include additional or modified control measures designed and implemented to correct
problems identified. If approval by the VESCP authority, VSMP authority, or department is necessary
for the control measure, revisions to the SWPPP shall be completed no later than seven calendar
days following approval. Implementation of these additional or modified control measures must be
accomplished as described in Part II G (of the CGP).
• The operator shall update the SWPPP as soon as possible but no later than seven days following any
modification to its implementation. All modifications or updates to the SWPPP shall be noted and
shall include the following items:
• A record of dates when:
a. Major grading activities occur;
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b. Construction activities temporarily or permanently cease on a portion of the site; and
c. Stabilization measures are initiated;
d. Documentation of replaced or modified controls where periodic inspections or other information
have indicated that the controls have been used inappropriately or incorrectly and were modified;
e. Areas that have reached final stabilization and where no further SWPPP or inspection
requirements apply;
f. All properties that are no longer under the legal control of the operator and the dates on which the
operator no longer had legal control over each property;
g. The date of any prohibited discharges, the discharge volume released, and what actions were
taken to minimize the impact of the release;
h. Measures taken to prevent the reoccurrence of any prohibited discharge; and
i. Measures taken to address any evidence identified as a result of an inspection required under
Part II F (of the CGP).
• Amendments, modifications, or updates to the SWPPP shall be signed in accordance with Part III K
(of the CGP).
• A log of any changes to the SWPPP is provided in Appendix K.
6.3 PUBLIC NOTIFICATION/SIGNAGE
• Upon commencement of land disturbance, the operator shall post conspicuously a copy of the notice
of coverage letter near the main entrance of the construction activity.
• For linear projects, the operator shall post the notice of coverage letter at a publicly accessible
location near an active part of the construction project (e.g., where a pipeline crosses a public road).
• Information for public access to the SWPPP (name and telephone number of a contact person for
SWPPP availability) shall also be posted and maintained in accordance with Part II C (of the CGP).
• The operator shall maintain the posted information until termination of general permit coverage as
specified in Part I F (of the CGP).
6.4 SWPPP AVAILABILITY
Operators with day-to-day operational control over SWPPP implementation shall have a copy of the
SWPPP available at a central location on -site for use by those identified as having responsibilities
under the SWPPP whenever they are on the construction site.
The operator shall make the SWPPP and all amendments, modifications, and updates available upon
request to the department, the VSMP authority, the EPA, the VESCP authority, local government
officials, or the operator of a municipal separate storm sewer system receiving discharges from the
construction activity. If an on -site location is unavailable to store the SWPPP when no personnel are
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present, notice of the SWPPP's location must be posted near the main entrance of the construction
site.
• The operator shall make the SWPPP available for public review in an electronic format or in hard
copy. Information for public access to the SWPPP shall be posted and maintained in accordance with
Part II C (of the CGP). If not provided electronically, public access to the SWPPP may be arranged
upon request at a time and at a publicly accessible location convenient to the operator or his
designee but shall be no less than once per month and shall be during normal business hours.
Information not required to be contained within the SWPPP by this general permit is not required to
be released.
6.5 TERMINATION OF GENERAL PERMIT COVERAGE
• The operator of the construction activity shall submit a notice of termination to the VSMP authority
after one or more of the following conditions have been met:
a) Necessary permanent control measures included in the SWPPP for the site are in place and
functioning effectively and final stabilization has been achieved on all portions of the site for which
the operator has operational control. When applicable, long-term responsibility and maintenance
requirements for permanent control measures shall be recorded in the local land records prior to
the submission of a complete and accurate notice of termination, and the construction record
drawing prepared;
b) Another operator has assumed control over all areas of the site that have not been finally
stabilized and obtained coverage for the ongoing discharge;
c) Coverage under an alternative VPDES or state permit has been obtained; or
d) For individual lots in residential construction only, final stabilization as defined in 9VAC25-880-1
has been completed and the residence has been transferred to the homeowner.
• The notice of termination should be submitted no later than 30 days after one of the above conditions
being met.
• A Notice of Termination (NOT) form is provided in Appendix D of the SWPPP.
• Construction record drawings for permanent stormwater management facilities shall be submitted to
the VSMP authority in accordance with 9VAC25-870-108 and 9VAC25-870-112 prior to permit
termination. The construction record drawing shall be appropriately sealed and signed by a
professional registered in the Commonwealth of Virginia, certifying that the stormwater management
facilities have been constructed in accordance with the approved plan.
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CERTIFICATION
CERTIFICATION
I certify under penalty of law that I have read and understand this document and that this document and
all attachments were prepared 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:
Signature:
M
Title:
Date:
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Appendix A GENERAL LOCATION MAP
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
Appendix B PROJECT PLANS
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Plans Incorporated by Reference
Date
Name of Plan
Applicable Section/Phase
Disturbed
Acreage
08/09/2022
Innisfree Stream Mitigation Bank
Phase 2
9.9 acres
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Appendix C CONSTRUCTION GENERAL PERMIT
STORMWATER POLLUTION PREVENTION PLAN - INNISFREE STREAM MITIGATION BANK
Appendix D NOTICE OF COVERAGE LETTER, CGP
REGISTRATION STATEMENT AND NOTICE OF
TERMINATION (NOT)
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Please insert your Notice of Coverage Letter here when you receive it from
the Department of Environmental Quality (DEQ).
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Appendix E INSPECTION PERSONNEL INFORMATION AND
QUALIFICATIONS, PRECIPITATION LOG, AND
INSPECTION REPORTS
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Precipitation Log
Date Time Rainfall (to nearest
hundredth
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Appendix F CORRECTIVE ACTION LOG
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Corrective Action Log
Inspection
Date
Inspector Name(s)
Description of BMP
Deficiency
Corrective Action Needed (including
planned date/responsibleperson)
Date Action Taken/
Responsible Person
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Appendix G GRADING AND STABILIZATION ACTIVITIES LOG
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Grading and Stabilization Activities Log
Date Grading
Activity
Initiated
Description of Grading Activity
Description of Stabilization Measure
and Location
Date Grai
Activity Cc
(Indicate Ter
or Permar
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Appendix H SUBCONTRACTOR CERTIFICATIONS/
AGREEMENTS
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SUBCONTRACTOR CERTIFICATION
STORMWATER POLLUTION PREVENTION PLAN
Project Number:
Project Title:
Operator(s):
As a subcontractor, you are required to comply with the Stormwater Pollution Prevention Plan (SWPPP)
for any work that you perform on -site. Any person or group who violates any condition of the SWPPP
may be subject to substantial penalties or loss of contract. You are encouraged to advise each of your
employees working on this project of the requirements of the SWPPP. A copy of the SWPPP is available
for your review onsite.
Each subcontractor engaged in activities at the construction site that could impact stormwater must be
identified and sign the following certification statement:
I certify under the penalty of law that I have read and understand the terms and conditions of the
SWPPP for the above designated project and agree to follow the practices described in the
SWPPP.
This certification is hereby signed in reference to the above named project:
Company:
Address:
Telephone Number:
Type of construction service to be provided:
Signature:
Title:
Date:
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Appendix I MAINTENANCE AGREEMENTS FOR
STORMWATER MANAGEMENT FACILITIES
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Appendix J DELEGATION OF AUTHORITY
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Delegation of Authority
I, (name), hereby designate the person or specifically described position
below to be a duly authorized representative for the purpose of overseeing compliance with
environmental requirements, including the Construction General Permit, at the
construction site. The designee is authorized to sign any
reports, stormwater pollution prevention plans and all other documents required by the permit.
(name of person or position)
(company)
(address)
(city, state, zip)
(phone)
By signing this authorization, I confirm that I meet the requirements to make such a designation as set
forth in Virginia's General VPDES Permit for Discharges of Stormwater from Construction Activities
(CGP), and that the designee above meets the definition of a "duly authorized representative" as set forth
in in the CGP.
I certify under penalty of law that I have read and understand this document and that this document and
all attachments were prepared 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:
Company:
Title:
Signature:
Date:
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Appendix K LOG OF CHANGES AND UPDATES TO SWPPP
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SWPPP Updates Log
Amendment No.
Description of the Amendment
Date of
Amendment
Amendment Prepared by [Name(s)
and Title
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Appendix L. ADDITIONAL SUPPORTING INFORMATION