SW7130603_CURRENT PERMIT_20130619

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW 7�Q�
DOC TYPE
f7OCURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

QUA
NCDENR
North Carolina Department of Environment and
Division of Water Quality
Pat McCrory Thomas A. Reeder
Natural Resources
John E. Skvarla, III
Governor Acting Director Secretary
June 19, 2013
Mr. Dominick F. Piccolomini
Virginia Electric and Power Co. (Dominion NC Power)
701 East Carry Street, 12th Floor
Richmond, VA 23219
Subject: Stormwater Permit No. SW7130603
Dominion North Carolina Power—Winfall Substation
High Density Project
Perquimans County
Dear Mr. Piccolomini:
The Washington Regional Office received a complete Stormwater Management Permit
Application for Dominion North Carolina Power — Winfall Substation on June 6, 2013 and
additional information on June 18, 2013. Staff review of the plans and specifications has
determined that the project, as proposed, will comply with the Stormwater Regulations set forth
in Session Law 2008-211 and Title 15A NCAC 2H.1000. We are forwarding Permit No.
SW7130603 dated June 19, 2013, for the construction of the subject project.
This permit shall be effective from the date of issuance until June 19, 2021, and shall be
subject to the conditions and limitations as specified therein. Please pay special attention to
the Operation and Maintenance requirements in this permit. Failure to establish an adequate
system for operation and maintenance of the stormwater management system will result in
future compliance problems.
If any.parts, requirements, or limitations contained in this permit are unacceptable, you have
the right to request an adjudicatory hearing upon written request within sixty (60) days
following receipt of this permit. This request must be in the form of a written petition,
conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of
Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714. Unless such
demands are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please
contact Samir Dumpor, or me at [phone].
Sincerely, /-
Thomas Reeder
Division of Water Quality
AA/sd: K:\SD\Permits - Sand Filter\SW7130603
cc: Chris Soldan, ARCADIS-US (1100 Welborne Dr., Suite 100, Richmond, VA
23229)
erquimans County Building Inspections
Washington Regional Office
North Carolina Division of Water Quality Internet: www.newateroualilv.ore
943 Washington Square Mall Phone: [phone] One
Washington, NC 27889 FAX [phone] NorthCarolina
An Equal Opportunity/Affirmative Action Employer— 50%Recyded110% Post Consumer Paper NQt{1{µAll

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i
State Stormwater Management Systems
Permit No. SW7130603
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North
Carolina as amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Virginia Electric and Power Co. (Dominion North Carolina Power)
Dominion North Carolina Power— Winfall Substation
Perquimans County
FOR THE
construction, operation and maintenance of one (1) open sand filter with an underdrain in
compliance with the provisions of Session Law 2008-211 and 15A NCAC 2H .1000
(hereafter referred to as the "stormwater rules') and the approved stormwater management
plans and specifications and other supporting data as attached and on file with and
approved by the Division of Water Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until June 19, 2021, and shall be
subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.7 on page 3 of this permit. The stormwater control
has been designed to handle the runoff from 8,907 square feet of impervious area.
3. The tract will be limited to the amount of built -upon area indicated in Section 1.7 of
this permit, and as shown on the approved plans.
4. All stormwater collection and treatment systems must be located in either dedicated
common areas or recorded easements. The final plats for the project will be
recorded showing all such required easements, in accordance with the approved
plans.
5. The runoff from all built -upon area within the permitted drainage area of this project
must be directed into the permitted stormwater control system.
6. The built -upon areas associated with this project shall be located at lest 50 feet
landward of all surface waters.
Page 2 of 7

State Stormwater Management Systems
Permit No. SW7130603
The following design criteria have been permitted for the sand filter(s) and must be
provided and maintained at design conditions:
a. Drainage Area, ft2:
b. Total Impervious Surfaces, ft2:
C. Design Storm, inces:
d. Design Volume, ft :
e. Adjusted Water Quality Volume, ft3:
f. Provided Storage Volume, ft
g. Sediment Chamber Surface Ary, ft2:
h. Sand Chamber Surface Area, ft
i. Predevelopment 1 year 24 hour:
j. Post -development 1 year 24 hour:
k. Top / Bypass Weir Elevation, FMSL:
I. Bottom of Sand Filter Elevation, FMSL
M. Seasonal High Water Table, FMSL:
n. Receiving Stream/River Basin:
o. Stream Index Number:
P. Classification of Water Body:
It. SCHEDULE OF COMPLIANCE
2.
4.
7
15,995
8,907
1.5
1,102
826
2,390
280
1,500
0.24
0.26
13.75
12.25
10.84
UT to Mill Creek / Pasquotank
30-6-5-(2)
"SC"
The stormwater management system shall be constructed in its entirety, vegetated
and operational for its intended use prior to the construction of any built -upon
surface.
During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
The permittee shall at all times provide the operation and maintenance necessary to
assure the permitted stormwater system functions at optimum efficiency. The
approved Operation and Maintenance Plan must be followed in its entirety and
maintenance must occur at the scheduled intervals including, but not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowin.9 and revegetation of slopes and the vegetated filter.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and
specifications.
f. Debris removal and unclogging of bypass structure, infiltration media, flow
spreader, catch basins, piping and vegetated filter.
g. A clear access path to the bypass structure must be available at all times.
Records of maintenance activities must be kept for each permitted BMP. The
reports will indicate the date, activity, name of person performing the work and what
actions were taken.
The facilities shall be constructed as shown on the approved plans. This permit shall
become voidable unless the facilities are constructed in accordance with the
conditions of this permit, the approved plans and specifications, and other
supporting data.
If the stormwater system was used as an Erosion Control device, it must be
restored to design condition prior to operation as a stormwater treatment device,
and prior to occupancy of the facility.
Upon completion of construction, prior to issuance of a Certificate of Occupancy,
and prior to operation of this permitted facility, a certification must be received from
Page 3 of 7

State Stormwater Management Systems
Permit No. SW7130603
an appropriate designer for the system installed certifying that the permitted facility
has been installed in accordance with this permit, the approved plans and
specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must be noted on the Certification. A modification
may be required for those deviations.
Access to the stormwater facilities shall be maintained via appropriate easements at
all times.
The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited to, those listed below:
a. Any revision to any item shown on the approved plans, including the
stormwater management measures, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further subdivision, acquisition, lease or sale of all or part of the project area.
The project area is defined as all property owned by the permittee, forwhich
Sedimentation and Erosion Control Plan approval or a CAMA Major permit
was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
10. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
11. A copy of the approved plans and specifications shall be maintained on file by the
Permittee at all times.
12. The Director may notify the permittee when the permitted site does not meet one or
more of the minimum requirements of the permit. Within the time frame specified in
the notice, the permittee shall submit a written time schedule to the Director for
modifying the site to meet minimum requirements. The permittee shall provide
copies of revised plans and certification in writing to the Director that the changes
have been made.
III. GENERAL CONDITIONS
This permit is not transferable to any person or entity except after notice to and
approval by the Director. In the event of a change of ownership, or a name change,
the permittee must submit a completed Name/Ownership Change form to the
Division of Water Quality, signed by both parties, and accompanied by the
appropriate documentation as listed on page 2 of the form. The approval of this
request will be considered on its merits and may or may not be approved.
2. The permittee is responsible for compliance with all permit conditions until such time
as the Division approves any transfer request.
3. Failure to abide by the conditions and limitations contained in this permit may
subject the Permittee to enforcement action by the Division of Water Quality, in
accordance with North Carolina General Statute 143-215.6A to 143-215.6C.
4. The issuance of this permit does not preclude the Permittee from complying with
any and all statutes, rules, regulations, or ordinances, which may be imposed by
other government agencies (local, state, and federal) having jurisdiction.
5. In the event that the facilities fail to perform satisfactorily, including the creation of
nuisance conditions, the Permittee shall take immediate corrective action, including
Page 4 of 7

State Stormwater Management Systems
Permit No. SW7130603
those as may be required by this Division, such as the construction of additional or
replacement stormwater management systems.
6. The permittee grants DENR Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
7. The permit issued shall continue in force and effect until revoked or terminated. The
permit may be modified, revoked and reissued or terminated for cause. The filing of
a request for a permit modification, revocation and reissuance or termination does
not stay any permit condition.
8. Unless specified elsewhere, permanent seeding requirements for the stormwater
controls must follow the guidelines established in the North Carolina Erosion and
Sediment Control Planning and Design Manual.
9. Approved plans and specifications for this project are incorporated by reference and
are enforceable parts of the permit.
10. The issuance of this permit does not prohibit the Director from reopening and
modifying the permit, revoking and reissuing the permit, or terminating the permit as
allowed by the laws, rules and regulations contained in Session Law 2008-211, Title
15A NCAC 2H.1000, and NCGS 143-215.1 et. al.
11. The permittee shall notify the Division in writing of any name, ownership or mailing
address changes at least 30 days prior to making such changes.
12. This permit shall be effective from the date of issuance until June 19, 2021.
Application for permit renewal shall be submitted 180 days prior to the expiration
date of this permit and must be accompanied by the processing fee.
Permit issued this the 19th day of JUne, 2013.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
for
Division of Wate�JrQuality v
By Authority of the Environmental Management Commission
Permit No. SW7130603
Page 5 of 7

State Stormwater Management Systems
Permit No. SW7130603
Dominion North Carolina Power — Winfall Substation
Stormwater Permit No. SW7130603
Perquimans County
Designer's Certification
I, , as a duly registered in the
State of North Carolina, having been authorized to observe (periodically/ weekly/ full time)
the construction of the project,
(Project)
for (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
Page 6 of 7

State Stormwater Management Systems
Permit No. SW7130603
Certification Requirements:
1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The bypass structure weir elevation is per the approved plan.
6. The bypass structure is located per the approved plans.
7. A Trash Rack is provided on the bypass structure.
8. All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 3:1.
10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
11. The permitted amounts of surface area and/or volume have been provided.
12. All required design depths are provided.
13. All required parts of the system are provided.
14. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Perquimans County Building Inspections
Page 7 of 7

W>'�C_)
DWQ USE. ONLY
-, Date Received
Fee Paid
Permit Number
-0 - I3
�o
Applicable Rules: ❑ Coastal SW -1995 ❑ Coastal SW - 2008 ❑ Ph II - Post Construction
(select all that apply) ❑ Non -Coastal SW- HQW/ORW Waters ❑ Universal Stormwater Management Plan
❑ Other WQ M mt Plan:
State of North Carolina R E C E I V E
Department of Environment and Natural Resources
Division of Water Quality
JUN - 6 2013
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be platocopied for use as an original (�
I. GENERAL INFORMATION ���Fi `b —WAR0
1. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Dominion North Carolina Power - Winfall Substation
2. Location of Project (street address):
City:Winfall County:Perquimans
3. Directions to project (from nearest major intersection):
From the intersection of Two Mile Desert Road and Main St, proceed north 1 /4 mile The site is on the right
4. Latitude:360 13' 22" N Longitude:-760 2743" W of the main entrance to the project.
If. PERMIT INFORMATION:
1. a. Specify whether project is (check one): ®New ❑Modification ❑ Renewal w/ Modificationt
tRenewals with modifications also requires SWLI-102 - Renewal Application corn
b.1f this application is being submitted as the result of a modification to an existing permit, list the existing
permit number , its issue date (if known) and the status of
construction: ❑Not Started ❑Partially Completed* ❑ Completed* *provide a designer's certification
2. Specify the type of project (check one):
❑Low Density ®High Density ❑Drains to an Offsite Stormwater System ❑Other
3. If this application is being submitted as the result of a previously returned application or a letter from DWQ
requesting a state stormwater management permit application, list the stormwater project number, if
assigned, and the previous name of the project, if different than currently
proposed,
4.a. Additional Project Requirements (check applicable blanks; information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
❑CAMA Major
❑NPDES Industrial Stormwater
®Sedimentation/Erosion Control: 3.89 ac of Disturbed Area
❑404/401 Permit: Proposed Impacts
b.If any of these permits have already been acquired please provide the Project Name, Project/Permit Number,
issue date and the type of each permit:
5. Is the project located within 5 miles of a public airport? ®No ❑Yes
If yes, see S.L. 2012-200, Part VI: htt�//portal.ncdenr.org/web/wq/ws/su/statesw/rules laws
Form SWU-101 Version 06Aug2012 Page I of

Ill. CONTACT INFORMATION
1. a. Print Applicant / Signing Official's name and title (specifically the developer, property owner, lessee,
designated government official, individual, etc. who owns the project):
Applicant/Organization:Virginia Electric and Power Co. (Dominion North Carolina Power)
Signing Official & Title:Dominick F. Piccolomini, Authorized Representative
b.Contact information for person listed in item la above:
Street Address:701 East Carry Street, 12'h Floor
City:Richmond State:VA Zip:23219
Mailing Address
Phone: (804 ) 771-6082 Fax:
Email: I)[e-mail]
c. Please check the appropriate box. The applicant listed above is:
® The property owner (Skip to Contact Information, item 3a)
❑ Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below)
❑ Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and
2b below)
❑ Developer* (Complete Contact Information, item 2a and 2b below.)
2. a. Print Property Owner's name and title below, if you are the lessee, purchaser or developer. (This is the
person who owns the property that the project is located on):
Property Owner/,
Signing Official &
b.Contact information for person listed in item 2a above:
Street Address-
City: -
Mailing Address (if
City:
Phone: ( 1
Email:
State: z
State:
Fax: ! 1
3. a. (Optional) Print the name and title of another contact such as the project's construction supervisor or other
person who can answer questions about the project:
Other Contact Person/Organization:ARCADIS-US (Engineering Consultant)
Signing Official & Title:Chris Soldan or Todd Boykin
b.Contact information for person listed in item 3a above:
Mailing Address:"1100 Welborne Dr Suite 100
City:Richmond State:VA Zip:23229
Phone: (804 ) 740-0181 Fax: (804 ) 740-1053
[e-mail] or [e-mail]
4. Local jurisdiction for building permits: Perquimans County, NC Building Inspections
Point of Contact:Virgil'Parrish Phone k: (252 ) 426-8283
Fonn S WU-101 Version 06Aug2012 Page 2 of 6

IV. PROJECT INFORMATION
1. In the space provided below, briefly summarize how the stormwater runoff will be treated.
An open basin sand filter will treat the runoff for the first 1r/z inch of rainfall from existing impervious areas
on a'1:1 basis with the increased impervious area. The outlet pipe will discharge to the existing ditch For
storms greater than the 1-year 24-hour storm, excess runoff will sheet flow to the existing grass -lined ditches
2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved:
❑ Approval of a Site Specific Development Plan or PUD Approval Date:
❑ Valid Building Permit Issued Date:
❑ Other: Date:
b.If claiming vested rights, identify the regulation(s) the project has been designed in accordance with:
❑ Coastal SW - 1995 ❑ Ph II - Post Construction
3. Stormwater runoff from this project drains to the Pasguotank River basin.
4. Total Property Area: 4 acres
5. Total Coastal Wetlands Area: acres
6. "Total Surface Water Area: acres
7. Total Property Area (4) - Total Coastal Wetlands Area (5) -Total Surface Water Area (6) = Total Project
Area': acres
Total project nren shall be calculated to exclude the followingg the normal wool of ingpunded structures, the area
Nhueen the books of streams and rivers, the area below the Normal High Water (NHW) line or Mean High Water
(MHW) line, and coastal wetlands lardroard frmn the NHW (or MHW) line. '17re resultant project area is used to
calculate overall percent built upon area (BUA). Nou-coastal wetlands landward of fhe NHW (or MHW) line may
be included in file total project area.
8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 49 %
9. How many drainage areas does the project have? 3 (For high density, count 1 for each proposed engineered
stormwater BMP. For low density and other projects, use 1 for the whole property area)
10. Complete the following information for each drainage area identified in Project Information item 9. If there
are more than four drainage areas in the project, attach an additional sheet with the information for each area
provided in the same format as below.
Basin Information
Drainage Area 1
Drainage Area 2
Draina e Area 3
Draina e Area _
Receiving Stream Name
Unnamed
tributary to
Mill Creek
Unnamed
tributary to
Mill Creek
Unnamed
tributary to
Mill Creek
Stream Class "
Mill Creek (SC)
Mill Creek (SC)
Mill Creek (SC)
Stream Index Number*
30-6-5-(2)
30-6-5-(2)
30-6-5-(2)
Total Drainage Area (so
37,168
106,192
33,760 ✓
On -site Drainage Area (so
37,168
106,192
33,760
Off -site Drainage Area (so
0
0
0
Proposed Impervious Area** (so
12,917 .
54,322
19,070
% Impervious Area** total
35
51
56
Impervious'* Surface Area
Drainage Area 1
Drainage Area 2
Drainage Area _
Drainage Area _
On -site Buildings/Lots (so
-
-
On -site Streets (so
-
-
On -site Parkin (so
-
-
On -site Sidewalks (so
-
-
Other on -site (so
-979 ✓
4097 ✓
1604 ✓
Future (so
-
-
Off -site (so
-
-
Existin BUA*** (so
13,896
50,226 ✓
17,466
Total (so:
12,917
54,322
19,070
Streaur Class and Index Number call be determined at: http://portal.ncdenr.org eb/wq[ps/csu/classifications
Form SWU-101 Version 06Aug2012 Page 3 of 6

Int/wrvious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Report only that anount of existing BL1A that will remain after development. Do not report any existing BUA that
is to be removed and which will be replaced by new BUA.
11. Flow was the off -site impervious area listed above determined? Provide documentation.
Projects in Union County: Contact DIVQ Central Office stafflo check ifthe project is located within a Threatened &
Endangered Species watershed that stay be subject to more stringent smrnnvater requirements as per 1511 NCAC 02B .0600.
V. SUPPLEMENT AND O&M FORMS
The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms
must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded
from htti)://t)ortal.ncdenr.oru/web/wa/ws/su/bmD-manual.
VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. A detailed application instruction sheet and BMP
checklists are available from http://portal.ncdenr.oriz/web/wq/ws/su/statesw/forms does. The complete
application package should be submitted to the appropriate DWQ Office. (The appropriate office may be
found by locating project on the interactive online map at http://portal.ncdenr.org/web/wq/ws/su/maps.)
Please indicate that the following required information have been provided by initialing in the space provided
for each item. All original documents MUS"I' be signed and initialed in blue ink. Download the latest versions
for each submitted application package from http://portal.ncdenr.org/web/wq/ws/su/statesw/forms does.
Initials
1. Original and one copy of the Stormwater Management Permit Application Form.
2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants
Form. (if required as per Part VII below)
3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M
agreement(s) for each BMP.
4. Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to
http://www.envhelp.org/pages/onestopexpress.html for information on the Express program
and the associated fees. Contact the appropriate regional office Express Permit Coordinator for
additional information and to schedule the required application meeting.)
5. A detailed narrative (one to two pages) describing the stormwater treatment/management for
6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the
receiving stream drains to class SA waters within 1/2 mile of the site boundary, include the Vz
mile radius on the map.
7. Sealed, signed and dated calculations (one copy).
8. Two sets of plans folded to 8.5" x 14" (sealed, signed, & dated), including:
a. Development/Project name.
b. Engineer and firm.
c. Location map with named streets and NCSR numbers.
d. Legend.
e. North arrow.
I. Scale.
g. Revision number and dates.
h. Identify all surface waters on the plans by delineating the normal pool elevation of
impounded structures, the banks of streams and rivers, the MHW or NHW line of tidal
waters, and any coastal wetlands landward of the MHW or NHW lines.
• Delineate the vegetated buffer landward from the normal pool elevation of impounded
structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters.
i. Dimensioned property/project boundary with bearings & distances.
j. Site Layout with all BUA identified and dimensioned.
k. Existing contours, proposed contours, spot elevations, finished floor elevations.
1. Details of roads, drainage features, collection systems, and stormwater control measures.
in. Wetlands delineated, or a note on the plans that none exist. (Must be delineated by a
qualified person. Provide documentation of qualifications and identify the person who
made the determination on the plans.
n. Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations.
Form SWU-101 Version 06Aug2012 Page 4 of 6

Q
o. Drainage areas delineated (included in the main set of plans, not as a separate document).
p. Vegetated buffers (where required).
Copy of any applicable soils report with the associated SI-IW"r elevations (Please identify
elevations in addition to depths) as well as a map of the boring locations with the existing
elevations and boring logs. Include an 8.5"xll" copy of the NRCS County Soils map with the
project area clearly delineated. For projects with infiltration BMPs, the report should also
include the soil type, expected infiltration rate, and the method of determining the infiltration rate.
(Infiltration Devices submitted to WiRO: Schedule a site visitfor DWQ to verifij the SHWr prior
to submittal, [phone].)
A copy of the most current property deed. Deed book: 16 Page No: 554
For corporations and limited liability corporations (LLC): Provide documentation from the NC _
Secretary of State or other official documentation, which supports the titles and positions held
by the persons listed in Contact Information, item 'la, 2a, and/or 3a per'15A NCAC 2H.1003(e).
The corporation or LLC must be listed as an active corporation in good standing with the NC
Secretary of State, otherwise the application will be returned.
http://www.secretary.state.nc.us/Corporations/CSearch.aspx
VIL DEED RESTRICTIONS AND PROTECTIVE COVENANTS
For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective
covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed
BUA allocations vary, a table listing each lot number, lot size, and the allowable built -upon area must be
provided as an attachment to the completed and notarized deed restriction form. The appropriate deed
restrictions and protective covenants forms can be downloaded from
http://portal.ncdenr.org/web/wq/ws/so/statesw/forms does. Download the latest versions for each
submittal.
In the instances where the applicant is different than the property owner, it is the responsibility of the property
owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring
that the deed restrictions are recorded.
By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions and
protective covenants for this project, if required, shall include all the items required in the permit and listed
on the forms available on the website, that the covenants will be binding on all parties and persons claiming
under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the NC DWQ, and that they will be recorded prior to the sale of any lot.
Vill. CONSULTANT INFORMATION AND AUTHORIZATION
Applicant: Complete this section if you wish to designate authority to another individual and/or firm (such as a
consulting engineer and/or firm) so that they may provide information on your behalf for this project (such as
addressing requests for additional information).
Consulting Engineer:Todd Boykin
Consulting Finn: ARCADIS-US
Mailing Addressi1100 Welborne Dr Suite 100
City:Richmond State:VA Zip:23229
Phone: (804 ) 740-0181
Email:[e-mail]
Fax: (804 ) 740-1053
IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled out, complete this
section)
1, (print or type name of person listed in Contact Information, item 2a) certify that I
own the property identified in this permit application, and thus give permission to (print or hype name of person
listed in Contact Information, item 1a) with (print or hjpe tame of organization listed in
Contact btfornation, item la) to develop the project as currently proposed. A copy of
the lease agreement or pending property sales contract has been provided with the submittal, which indicates the
party responsible for the operation and maintenance of the stormwater system.
Form S WU-101 Version 06Aug2012 Page 5 of 6

As the legal property owner I acknowledge, understand, and agree by my signature below, that if my designated
agent (entity listed in Contact Information, item 1) dissolves their company and/or cancels or defaults on their
lease agreement, or pending sale, responsibility for compliance with the DWQ Stormwater permit reverts back to
me, the property owner. As the property owner, it is my responsibility to notify DWQ immediately and submit a
completed Name/Ownership Change Form within 30 days; otherwise I will be operating a stormwater treatment
facility without a valid permit. I understand that the operation of a stormwater treatment facility without a valid
permit is a violation of NC General Statue 143-215.1 and may result in appropriate enforcement action including
the assessment of civil penalties of up to $25,000 per day, pursuant to NCGS 143-215.6.
a Notary Public for the State of
do hereby certify that
before me this _ day of ,
County of
personally appeared
and acknowledge the due execution of the application for
a stormwater permit. Witness my hand and official seal,
SEAL
My commission
X. APPLICANT'S CERTIFICATION Dominick F. Piccolomini for
1, (print or hjpe name of person listed in Contact Information, item 1n) Dominion North Carolina Power
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of the
applicable stormwater rules under "15A NCAC 21-1 .10000%and any other applicable state stormwater requirements.
Signature: o�/��� � ��.e ram- ��- Date: .-/31113�
sue, a Notary Public for the State of Gea+tty of
_ptchman� do hereby certify that amtpi"D{(� F. �r rn�o(yn1 personally appeared
before me this��iay of , tro I3 , and acknowledge tl e Live execution of the application for
a stormwater permit. Witness my hand and official seal, E
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My commission expires 7Scl . go(5-
Form SW U-101 Version 06Aug2012 Page 6 of 6

Permit Number.
(to be provided by DWQ)
Op W47E4
WDEHR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
SAND FILTER SUPPLEMENT
This form must be tilled out on line, punted and submitted with all of the required information.
Make sure to also fill out and submit the Required Items Checklist (Section NIJ and the I&M Agreement (Section 1W
11. PROJECT INFORMATION
Project name Dominion North Carolina Power - Winfall Substation
Contact name Chris Soldan or Todd Boykin
Phone number 804-740-0181
Date May 29. 2013
Drainage area number Sand Filter Drainage Area SFDA1 (subdrainage area of DAN1)
II. DESIGN INFORMATION
Site Characteristics
Drainage area (A,)
Impervious area
% Impervious (IA)
Design rainfall depth (RD)
Peak Flow Calculations
1-yr, 24-hr runoff depth
1-yr, 24-hr intensity
Pre -development 1-yr, 24-hr runoff
Post -development 1-yr, 24-hr runoff
Pre/Post 1-yr, 24-hr peak control
Storage Volume
Design volume (WQV)
Adjusted water quality, volume (WQVA4)
Volume contained in the sedimentation basin and on top of the sand filter
Top of sand filter/grate elevation
Weir elevation (between chambers)
Maximum head on the sedimentation basin and sand filter (hr Fi a)
Average head on the sedimentation basin and sand filter (hA)
Runoff Coefficient (R,r)
Type of Sand Filter
Open sand filter?
SHWT elevation
Bottom of the sand filter elevation
Clearance (ds,,T)
Closed/pre-cast sand filter?
SHWT elevation
Bottom of the sand filter elevation
Clearance (dsawr)
If this is a closed, underground closed sand filler. The clearance between
the surface of the sand filter and the bottom of the roof of the underground
structure (da.)
15,995.00 fill
8,907.D0 ft'
55.7% %
1.50 in
3.06
in
0,13
inthr
0.24
ft'/sec
0.26
ff'lsec
0.02
ft'/sec
1,102.00 ft'
826.50 ft'
2,390.00 ft'
14 ft amsl
13.75 $ amsl
0.25 it
0.13'ft
0.55 (unitless)
Y YorN
10.84 It amsl
12.25 it amsl
1.41
YorN
ft amsl
ft amsl
OK
E C E I V E D
JUN - 6 2013
OK
Insufficient depth.
OK
Form SW401Sand Filter-Rev.5 2009Sept17 Parts I and II. Proiect Design Summary, Page 1 of 2

Permit Number.
(to be povided by DWO)
Sedimentation Basin
Surface area of sedimentation basin (A,)
Sedimentation basin/chamber depth
Sand Filter
Surface area of sand filter (Af)
Top of sand media filter bed elevation
Bottom of sand media filter bed/drain elevation
Depth of the sand media filter bed (d,)
Coefficient of permeability for the sand filler (k)
Outlet diameter
Outlet dischargeHlowrate
Time to drain the sand filter (1)
Time to drain the sand filter (t)
Additional Information
Does volume in excess of the design volume bypass the sand fifteR
Is an off-line flaw-splifting device used?
If draining to SA waters: Does volume in excess of the design volume flow
evenly distributed through a vegetated filter?
What is the length of the vegetated filter?
Does the design use a level spreader to evenly distribute flow?
Is the BMP located at least 30ft from surface waters (50ft if SA waters)?
If not a dosed bottom, is BMP located at least 100ff from water supply wells?
Are the vegetated side slopes equal to or less than 3:1
Is the BMP located in a recorded drainage easement with a recorded access
easement to a public Right of Way (ROW)?
What is the width of the sedimentation chamber/forebay (Wsw)?
What is the depth of sand over the outlet pipe (dpipe)?
260.00 ff'
JR. nieels IIIII unmet, uuuuey iincu lu ue niuedcuu w
1,50 ft
nnnln:n Ilan —.....A ..nl..nn :( nr.n..nAn. Clnnv.n
1,500.00 ft'
Vn, muem umsumw, um iiidy uauu w ue IIIUIWseu w
nnnlnin IFn —.4—A nlnn i(nrm� nAn� Cln�nnn
13.75 ft amsl
12.25 ft amsi
1.50 It
3,50 (ft/day)
4.00 in
0.06 ft'/sec
10.29hours
OK. Submit drainage calculations.
0.43 days
Y
Y or N
OK
Y
YorN
OK
YorN
It
YorN
Y
YorN
OK
Y
YorN
OK
Y
YorN
OK
YorN
2.00'It
OK
1.17 ft
OK
Form SW401Sand Fllter-Rev.5 2009Sep117 Parts I and II. Petted Design Summary, Page 2 of 2

DV
Permit Number:
(to be provided by OWQ)
Drainage Area Number:
Sand Filter Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a
known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or
replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and
the removal efficiency of the BMP.
Important maintenance procedures:
— "fhe drainage area will be carefully managed to reduce the sediment load to the sand filter.
— The sedimentation chamber or forebay will be cleaned out whenever sediment depth exceeds
six inches.
— Once a year, sand media will be skimmed.
— The sand filter media will be replaced whenever it fails to function properly after maintenance.
The sand filter will be inspected quarterly and within 24 hours after every storm event greater than
1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in
a known set location and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired
immediately.
BMP element:
Potential problem:
How I will remediate the problem:
Entire BMP
Trash/debris is present.
Remove the trash/debris.
Adjacent pavement (if
Sediment is present on the
Sweep or vacuum the sediment as soon as
applicable)
pavement surface.
possible.
Perimeter of sand filter
Areas of bare soil and/or erosive
Regrade the soil if necessary to remove the
gullies have formed.
gully, and then plant a ground cover and
water until it is established. Provide lime
and a one-time fertilizer application.
Vegetation is too short or too long.
Maintain vegetation at an appropriate
height.
Flow diversion structure
The structure is clogged.
Unclog the conveyance and dispose of any
'
sediment offsite.
The structure is damaged.
Make any necessary repairs or replace if
damage is too large for repair.
Forebay or pretreatment area
Sediment has accumulated to a
Search for the source of the sediment and
depth of greater than six inches.
remedy the problem if possible. Remove
the sediment and stabilize or dispose of it
p
in a location where it will not cause
'
t/ ®
impacts to streams or the BMP.
Erosion has occurred.
Provide additional erosion protection such
JUN - 6 2013
as reinforced turf matting or riprap if
needed to prevent future erosion
problems.
�%��
IQ— Y V ARO
Weeds are present.
Remove the weeds, preferably by hand. If
a pesticide is used, wipe it on the plants
rather than spraying.
Form S W 401-Sand Filter O&M-Rev.4 2009Sept 17
Page I of 3

BMP element:
Potentialproblem:
How I will remediate theproblem:
Filter bed and underdrain
Water is ponding on the surface for
Check to see if the collector system is
collection system
more than 24 hours after a storm.
clogged and flush if necessary. If water
still ponds, remove the top few inches of
filter bed media and replace. If water still
ponds, then consult an expert.
Outlet device
Clogging has occurred.
Clean out the outlet device. Dispose of the
sediment offsite.
The outlet device is damaged
Repair or replace the outlet device.
Receiving water
Erosion or other signs of damage
Contact the NC Division of Water Quality
have occurred at the outlet.
401 Oversight Unit at 919-733-1786.
Form SW401-Sand Filter O&M-Rev.4 2009Septl 7 Page of 3

Permit Number:
provided by DIVQ)
I acknowledge and agree by my signature below that I am responsible for the performance of the
maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior
to any changes to the system or responsible party.
Project name:Dominion North Carolina Powe r - Winfall Substation
BA1fP drainage area number:SFDAI
Print name:Dominick F. Piccolomini
Title:Authorized Representative, Virginia Electric and Power Company
Address:701 East Cary Street: 12t11 Floor. Richmond, VA 23219
Date: 2r131 //3
Note: The legally responsible party should not be a homeowners association unless more than 50%of the lots have been
sold and a resident of the subdivision has been named the president.
1, , a Notary Public for the State of
V6§niq , Cect of VchmmnA , do hereby certify that
Dbmt6ck_ e, PtecOOW*I , personally appeared before me this 315- day of
(vial_ � 201.3 , and acknowledge the due execution of the forgoing sand filter
maintenance requirements. Witness my hand and official se I,
P.
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My commission expire,
Form SW401-Sand Filter O&M-Rev.4 2009Septl7 Page 3 of 3