SW7111201_HISTORICAL FILE_20210729

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW 1111RO
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

Was --'CD
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
BPJAN WPENN
Director
NORTH CAROLINA
Environmental Quality
July 29, 2021
Atlantic Wind, LLC
Attention: W. Benjamin Lackey, Authorized Signatory
1125 NW Couch St., Suite 700
Portland, OR 97209
Subject: Stormwater Permit Renewal
Stormwater Management Permit SW7111201
Desert Wind — Temporary Laydown Facility
Perquimans County
Dear Mr. Lackey:
A Division of Energy, Mineral, and Land Resources file review has determined that
Stormwater Permit SW7111201 for a stormwater treatment system consisting of two
sediment basins to serve a proposed Temporary Laydown Facility located in
Perquimans County, North Carolina expires on December 12, 2021. This is a reminder
that permit renewal applications are due 180 days prior to expiration. We do not have a
record of receiving a renewal application.
If you wish to maintain this permit, please submit a completed permit renewal
application along with a $505.00 fee for permit renewal. Permit application forms for
renewal can be found on our website at: hftps://deq.iic.gov/about/divisiolls/energy-
mineral-and-land-resources/stormwater/stormwater-program/post-construction-2. North
Carolina General Statutes and the Coastal Stormwater rules require that this property
be covered under a stormwater permit if the project is built. Failure to maintain a permit
subjects the owner to assessment of civil penalties. If this project has not been built and
you do not wish to maintain the permit, please advise.
If you have questions, please feel free to contact me at [phone]. 1 will be glad to
discuss this by phone or meet with you. If you would like, I can e-mail you a copy of the
application forms. You can request a copy by e-mailing me at
roger.thorpeCcDncdenr.gov.
Sincerely,
Roger K. Thorpe
Environmental Engineer
— North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
Washington Regional Office 1 943 Washington Square Mall I Washington, North Carolina 27889
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STORM WATER MANAGEMENT PLAN
FOR
LAYDOWN YARD AT
DESERT WIND PROJECT
Pasquotank County &
Perquimans County
North Carolina
Owner/Operator:
lberdrola Renewables
201 King of Prussia Road, Suite 500
Radnor, PA 19087
Prepared: November 10, 2011
SEAL
28116
Prepared By:
3 'Ar
FISH ERASSOCIATES
135 Calkins Road, Rochester, NY 14623
Phone: [phone]
www.fisherassoc.com
FA No.: 110003
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STORM WATER MANAGEMENT CALCULATIONS
FOR
LAYDOWN YARD AT
DESERT WIND PROJECT
Perquimans County &
Perquimans County
North Carolina
Owner/Operator:
Iberdrola Renewables
201 King of Prussia Road, Suite 500
Radnor, PA 19087
Published: November 10, 2011
Resubmitted: June 5, 2015
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Prepared By:
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FISHERASSOCIATES
135 Calkins Road, Rochester, NV 14623
Phone: [phone]
www.fisherassoc.com
FA No.: 110003

1
t
Soil, Water, & Environment
' Group
June 17, 2015
Mr. Steven D. Wilkinson, PE
' Project Engineer
Fisher Associates
135 Calkins Rd, Suite A
' Rochester, NY 14623
Soil, Water, & Environment Group, PI.EC
3216 Byers Drive, Suite B
Raleigh, NC 27607
Ph# [phone] • Fax# [phone] • hrtp:/hv«m•.swegrp.com
' Re: In -Situ Hydraulic Conductivity Testing Report for Storm water BMPs — Desert Wind
(Iberdola) Project Storm water BMP sites, Pasquotank Co., NC
' Dear Mr. Wilkinson,
This letter report discusses field work completed at the Desert Wind (Iberdola) Project Storm
water BMP sites through June, 2015 by Soil Water and Environment Group (SWE) personnel for
the five (5) proposed storm water receiver, sites (temporary and permanent infiltration basins).
B The information contained in this report can be used in the permit application process for a
Division of Water Resources (DWR) storm water permit for treating water exiting the proposed
project impervious surfaces.
The site was investigated and observations were recorded about the suitability of native,
disturbed agricultural soils to receive storm water from three project BMP sites (SPl/2, SP3, and
SP4a/b/c) (Figures). The three BMP sites are located on a large farm at the south end of the
Great Dismal Swamp in Pasquotank County, NC. SPI, 2 and 3 are along Foreman Road and
SP4 is along Access Road 30 off of Swamp Road (SR 1214). Soil found on the site and vicinity
is characteristic of the Coastal Plain in this region of NC and soils along interstream divides.
Vegetation on the sites was managed crops (soybeans, corn, & wheat) and fallow fields.
According to the NRCS Soil Survey for Pasquotank County (NRCS Soil Web, 2015) soils
present at the storm water receiver sites include, Portsmouth (Pt) and Cape Fear (CO series soils.
The study site contains highly disturbed agricultural soils with intensive drainage infrastructure
(perimeter and lateral ditches, and flashboard risers). Field augerings revealed soils present are
most similar to the Portsmouth loam and Cape Fear loam series soils. Portsmouth and Cape Fear
series soils consist of poor to very poorly drained, slow to rapidly permeable soils that formed
from wet sandy marine and fluvial sediments of the lower Coastal Plain.
In -situ saturated hydraulic conductivity (Ksat) measurements were performed at each BMP site
with a compact constant head permeameter (CCHP or Amoozemeter). A detailed soil profile
description was performed at each Ksat location to determine the most limiting horizon for Ksat
testing as well as other soil characteristics such as depth to ground water (GW) and seasonally
high water table (SH WT) observations (See Soil Descriptions — Appendix). The Ksat
measurements were performed at anticipated design depths and in the most limiting soil horizons
above the observed SHWT if present.

The Ksat values ranged from 1.2 to 18.3 in/hr (18.3 - 273.3 gpd/ft). The hydraulic
conductivities are summarized for each BMP in Table 1. Detailed test results are in the
Appendix.
Table I: Summary of BMP sites hvdraulic conductivity. Pasauotank Co. NC
BMP site
Depth in.
H draulic conductivity
SHWT (in.)*
G d/n
in/hr
SPl & SP2
16.5
260.3
17.4
28
SP3
23.6
273.3
18.3
28
SP4a
21.7
29.5
2.0
18
SP4b
21.7
256.2
17.1
26
SP4d
23.6
24.1
1.6
18
SP4e
22.8
18.3
1.2
18
SP4f
23.6
27.7
1.9
18
• SI4WT achieved through intensive agricultural drainage practices
The instantaneous loading rate for the soils found at SP 1-2, SP-3, and SP4b/c (Portsmouth
series) is found in Table 2 to be 0.5-1.0 in/hr for the given slope (0-3%). If BMP vegetation is
maintained, this rate can be increased by 25% to .625-1.5 in/hr. The instantaneous loading rate
for the soils found at SBP4a (Cape Fear series) is found in Table 2 to also be 0.5-1.0 in/hr for the
given slope (0-3%). This rate can also be increased by 25% to 0.625-1.5 in/hr, if BMP vegetation
will be maintained.
Table 2: Typical Ranges of Soil Infiltration Rates by Soil Texture and Slope (lberdola-
Desert Wind). Pasauotank Co.. NC.
Basic Infiltration Rate in/hr
Slope
Texture
0-30%
3-9%
9+%
Sands
1.0+
0.7+
0.5+
loamy sands
0.7-1.5
0.5-1.0
0.4-0.7
sandy learns and
fine sandy loams
0.5-1.0
0.4-0.7
0.3-0.5
very fine sandy
loam and silt loam
0.3-0.7
0.2-0.5
0.15-0.3
sandy clay loam and
silty clay loam
0.2-0.4
0.15-0.25
0.1-0.15
clay and silty clay
0.1-0.2
0.1-0.15
<0.1
Source: Sprinkler Irrigation Association, Sprinkler Irrigation (1969)
I. For good vegetative cover, these rates may be 25-50% greater. For poor surface conditions, rates may be as much
as 50% less.

It appears from site data that the proposed BMP sites have potential for storm water distribution.
All five (5) 13MP locations contain suitable soils with textures allowing rapid infiltration and
adequate treatment characteristics for receiving and filtering storm water before entering surface
waters. However, SP4a, d-f Ksats contain Cape Fear series soils with a shallow Ap horizon and
limiting 13 horizons for storm water infiltration along with a seasonal high water table soil
characteristics occurring near 16-18 inches of the soil surface under current drainage conditions.
These characteristics may limit the sites potential for BMP implementation due to the separation
required between the soil surface and SHWT for storm water treatment per DWR statutes.
Additional soil material or land area may be needed to achieve the proper depth of soil for
treatment above the seasonal high water table and allow for a higher volume of soil, retention,
and infiltration capacity.
We look forward to working with you on this project. Let us know if you have any questions
about the information and services provided to date for permitting these systems with DWR.
Sincerely,
,4�uv
Scott J. Frederick, EI, NCESS
Environmental Scientist
03 1 e
Soil, Water, & Environment
Group
3216 Byers Drive
Suite B
Raleigh, NC 27607
I'll [phone]
Fax [phone]
Cell [phone]
sifrederick a,swegrp corn
www.swggrp.com
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L.�
I LEGEND
^.� WTG 36 PROPOSED TURBINE
---- PROPOSED ACCESS ROAD
COLLECTION LINES
1]
BYPASS
APPROXIMATE
APPROXIMATE
APPROXIMATE
PROXIMMTE
LENGTH OF
APPROXIMATE
TEMPORARY
PERMANENT
SUBMRTAL
PROTECT
NGTH OF
DISTURBED
SECTION
COMPONENTS
TURBINES
EW ROAD
[LE
EXISTING ROAD
��
MIPERVIOU3
IMPERVIWS
FTwi
IMPROVEMENTS
ACRE (H-I
AREA
AREA
FT(ab)
ACRE (H-)
ACRE (-I.)
A
LAYDOWN YARD
20.3
B
NTERCONNECT
3350
57
C
OSM/
-
-
10
SUBSTATION
S21. S28.S29.
D
ACCESS ROAD
S43, S33, S19,
]590
19➢30
435
718/9
SW S34.S20.
S21,S31
S12. S21 S24.
E
ACCESS ROAD 12
CARL ROAD
S32, S5, S6.S13.
9330
24540
55
DELORS ROAD
S14, S25, S1.
S16.S15
T1, T5. T6. W
KENTROAD
T14, T19, T22,
F
ACCESS ROAD
Ti T, T18. 120,
16370
22930
64
T1-51TB-J / 10111
II 1, T23. T24,
T25
S35.540, S36.
FOREMAN ROAD
S37. S38. S39.
G
HORNEft ROAD
P5.541 S42
139M
12890
56
ACCESS ROAD
,
Pt, P6. P3, P4
R6, R3. R1. R9,
ATLAS ROAD
R10, R4.R1.R5,
H
HORNER ROAD
R2, RB, O8. 02
13710
30560
76
ACCESS ROAD
03,06, 07,011,
1/21315
01. 02
S26.SITS18.
I
FOREMR AN OAD
S9, 510, S3. S4,
11560
31790
65
OLD DOMINION RD
51.S2, Sll,S22
N9, N5. N6, N1.
WALDORD ROAD
N10. NB,Ll N2.
J
ACCESS ROAD
N3. N4. Ml, M2,
11790
45010
91
13114115116
N1, M3, W, L2,
L3, L4,L5
K
RALROAD BED
PM1. W24. W28,
11970
14820
39
ROAD
W23. W22 W27
W21. WIQ W2o,
L
ACCESS ROAD
W13. W12, W6.
8770
24480
56
17/18/22123
W4, W2. W3. W6,
w5, w9, wl o
W19. W11. W16.
M
ACCESS ROAD
W 7 W26.W25.
5920
14860
35
19120,21
W16-w15
MILL POND ROAD
N
ACCESS ROAD
Al. A2.81.82.
B3, B4. Ct. C4.
14670
21160
63
31 b131a 129/27,
C5, C6, D1, D2
4I25
w1, H1. W2. Gi,
O
ACCESS ROAD
G1. G2. G3. G6.
ID690
11810
38
261G6
GB
P
ACCESS ROAD
F1.F2,F3,F4
2640
5550
15
32133
w
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2
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Pow
N
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vawen .a.
110003
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CP-EC

FISHERASSOCIATES
November 14, 2011
Lyn Hardison
One -Stop Permitting Coordinator
NCDENR Washington Regional Office
943 Washington Square Mall
Washington, NC 27889
Desert Wind Project
Pasquotank and Perquimans Counties
North Carolina
Dear Lyn:
EXPRESS
DEC 01 2011
135 Calkins Road
Rochester, NY 14623
Phone: S85-334-1310
Fax: [phone]
w Jisherassoc.com
The enclosed submittal materials are for the Stormwater and Erosion Control Express Permitting Options for the
Laydown Yard portion of the proposed wind farm project.
The Laydown Yard is(al5-acre t mporarily stabilized site located in the center of the overall project that is currently
used as farm land. The si e wwill be constructed using geotextile material placed over the existing ground with gravel fill
placed over the geotextile. The site will also be enclosed with security fencing and gates. This area will be used during
the 3-year construction period for equipment and material storage, work force parking, construction office trailers and
concrete batch plant. After the project is complete, the proposed improvements will be removed, the site will be
restored to preconstruction conditions, and returned to its current farming use.
Erosion control measures include stabilized construction entrances, silt fence around the perimeter of the site, and
rock check dams in two of the existing channels that will be filled during the use of the site. These measures will
remain in place until the site has been restored to pre -construction conditions and returned to farm use. At the request
of the local farmers and landowners, temporary and permanent soil stabilization will consist of wheat straw and fescue
grass seed only to reduce the potential of unwanted vegetation.
For stormwater management, sediment basins, in lieu of a permanent BMP design, were designed to collect run-off
and then discharge it to the local drainage channels through flashboard riser outlets. The basins were designed in
accordance with NCDENR standards and checklist except for the length -width ratio which is due to the site
configuration. This deviation will not impair the basins' function. The basins will be maintained by the contractor
during the life of the project. The basin areas will be restored to preconstruction condition after project completion.
The documents being submitted include the following:
➢ Plan Set —4copies
➢ Sediment Basin Sizing calculations for the North and South Basins — 4 copies of each
➢ Impervious Area Master Plan — distinguishing between improved existing and new impervious areas — 4 copies
➢ Soil Scientist Report (Hydraulic Conductivity Testing) for all three major sites including the Laydown Yard-4
copies
➢ NCDENR On -Site Stream Determination-4 copies
➢ Express Review Submittal Master Plan — approximate limits and project elements included for each individual
submittals —4 copies
➢ Copy of all filed landowner lease agreements providing permission to submit plans on behalf of the landowner
➢ Financial Responsibility/Ownership Form

Desert Wind November 10, 2011
Page 2
➢ Stormwater Management Permit Application
➢ Erosion and Sediment Control Checklist
➢ Express Review fee check - $4,000
➢ Erosion and Sediment Control permit fee check - $1,365
Thank you for your attention to this project. Please let us know if there is anything we can do to help expedite your
review.
Sincerely,
FISHER ASSOCIATES, P.E., L.S., P.C.
Steven D. Wilkinson
Project Engineer
C: Walter Mcisner, Iberdrola Renewables
110003

f �f lyf W��a[C;l f S
14 of November. 2011
Dear Lyn:
Lyn Hardison
One -Stop Permitting Coordinator
NCDENR Washington Regional Office
943 Washington Square Mall
Washington, NC 27889
Please find within this package our official submittal of Stormwater and Erosion Control
Express Permitting Options for the "Laydown Yard" portion of the Desert Wind Project.
In addition, please find directly attached to this letter the executed Lease Memorandums
authorizing Iberdrola Renewables to pursue permits as required in the Development of our
Desert Wind Project. As previously discussed, we are sending you one copy of these
documents for central repository for as they will be referenced within our subsequent permit
applications. If additional copies are required, please do not hesitate to contact me with this
request and we will forward. A digital copy can also be made available at your request.
Should you have any questions, please contact Michael Clayton (IRI) or myself.
Regards,
wa%terJ. Mei5ner
Walter J. Meisner
Sr. Project Engineer
Inclusions: Desert Wind Property Lease Memorandums (Project Entirety)
cc. M. Clayton, File
IBERDROLA RENEWABLES, Inc.
201 King of Prussia Rd., Suite 500
Radnor, PA 19087
1 elephone(610) 2S4-9800
www, iberdrolarenewables.us

Reviewer:
©m North Carolina Department of Environment and
/.� Submit'.
Natural Resources
NCDENR Request for Express Permit Review Time:
Confirm:
FILL-IN all the information below and CHECK the Permit(s) you are requesting for express review. Call and Email the completed form to the
Permit Coordinator along with a completed DETAILED narrative, site plan (PDF (le) and vicinity map (same items expected in the application
ap ckape of the project location. Please include this form in the application package.
• Asheville Region -Alison Davidson 828.296.4698;alison.davidson(e-ncdenr.pov
• Fayetteville or Raleigh Region -David Lee 919-791.4203; david.lee(ncdenr.pov
• Mooresville & Winston Salem Region - Patrick Grogan 704-235.2107 or patrick.proganoncdenr.pov
• Washington Region -Lyn Hardison 252-948.3842 or Ivn.hardisonna ncdenr.gov
• Wilmington Region -Janet Russell 910-796.7302 or ianet.russellp(,ncdenr.pov
• ' Wilmington Region -Cameron Weaver 910-796-7303 or cameron.weaver(amcdenngov
NOTE: Project application received after 12 noon will be stamped in the following work day.
SW _
SW
SW_
SW
SW_
Project Name: DESERT WIND LAYDOWN YARD County: PERQUIMANS
Applicant: ERIK LALLUM Company: DESERT WIND/IBERDROLA RENEWABLE
Address: 201 KING PRUSSIA ROAD, STE 500 City: RADNOR, Slate: PA Zip: 19087
Phone: [phone], Fax: [phone], Email: (@� _
Physical Location:HEADING SOUTH ON TURNPIKE RD FROM RT 158 (8 MILES) TURN LEFT ONTO PRIVATE RD RAILROAD BED, GO 4 MILES
TURN LEFT ON EXISTING FARM LANE, SITE 600 FEET
Project Drains into UT TO PERUIMANS RIVER waters — Water classification C SW (for classification see-
http://h2o.enr.state.nc.us/bims/reports/reportsWB.html)
Project Located in _ River Basin. Is project draining to class ORW waters? YIN, within % mile and draining to class SA waters Y/N or within 1 mile
and draining to class HOW waters? Y/N
Engineer/Consultant: STEVE WILKERSON Company: FISHER ASSOCIATES
Address: 135 CALKINS ROAD City: ROCHESTER, State: NY Zip: 14623-_ EXPRESS
Phone: [phone], Fax: [phone] Email: _(a. _ 5lN _1 l N 7
SECTION ONE: REQUESTING A SCOPING MEETING ONLY t DEC 01 2011
❑ Scoping Meeting ONLY ❑ DWQ, ❑ DCM, ❑ DLR, ❑ OTHER: NC ®ENR
SECTION TWO: CHECK ONLY THE PROGRAM (S) YOU ARE REQUESTING FOR EXPRESS PERMITTING
❑ 401 Unit ❑ Stream Origin Determination: _ # of stream calls — Please alach TOPO map marking the areas in questions
❑ Intermittent/Perennial Determination: _ # of stream calls — Please attach TOPO map marking the areas in questions
❑ 401 Water Quality Certification ❑ Isolated Wetland ( linear ft o r acres)
❑ Riparian Buffer Authorization ❑ Minor Variance ❑ Major General Variance
® State Stormwater ❑ General ❑ SFR, ❑ SFR < 1 ac. ❑ Bkhd & Bt Rmp, ❑ Clear & Grub, ❑ Utility ❑ Other
❑ Low Density ❑ Low Density -Curb & Gutter _ # Curb Outlet Swales ❑ Off -site [SW _ (Provide permit #)]
❑ High Density -Detention Pond _ # Treatment Systems ❑ High Density -Infiltration _ #Treatment Systems
❑ High Density -Bio-Retention _ # Treatment Systems ❑ High Density —SW Wetlands _ # Treatment Systems
® High Density -Other _ # Treatment Systems /❑ MOD:❑ Major El Minor El Plan Revision ❑ Redev. Exclusion SW (Provide permit
❑ Coastal Management El Excavation & Fill ❑ Bridges & Culverts ❑ Structures Information
❑ Upland Development ❑ Marina Development ❑ Urban Waterfront
® Land Quality ® Erosion and Sedimentation Control Plan with 20 acres to be disturbed.(CK # Lk -- 9(for DENR use)) f
SECTION THREE — PLEASE CHECK ALL THAT IS APPLICABLE TO YOUR PROJECT (for both scoping and express meeting request)
Wetlands on Site ❑ Yes ❑ No
Wetlands Delineation has been completed: ❑ Yes ❑ No
US ACOE Approval of Delineation completed: ❑ Yes ❑ No
Received from US ACOE ❑ Yes ❑ No
Buffer Impacts: ❑ No ❑ YES: ac re(s)
Isolated wetland on Property ❑ Yes ❑ No
404 Application in Process w/ US ACOE: ❑ Yes ❑ No Permit
For DFNR use only
Fee Solit for mulUDle permits: (Check # ?-2F, Total Fee Amount S
SUBMITTAL DATES
Fee
SUBMITTAL DATES
Fee
CAMA
$
Variance (❑ Mal; El Min)
$
SW (® HD, ElLD, ❑ Gen)
$ �Y'cn
401:
$
LOS
$ - arc
Stream Deter,_
$
NCDENR EXPRESS June 2011

PWA
IH DEWR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue,
Governor
Atlantic Wind, LLC
Mr. Michael Clayton
201 King of Prussia Road, Suite 500
Radnor, PA 19087
Coleen H. Sullins
Director
July 8, 2011
Dee Freeman
Secretary
DWQ EXP# 11-0615
Perquimans/Pasquotank Counties
Subject Property: Desert Wind Project
Little River and Pasquotank River, Pasquotank River Basin
On -Site Stream Determination - EXPRESS REVIEW PROGRAM
Dear Mr. Clayton:
On June 29, 2011, at your request, I conducted an on -site determination to review a drainage feature located on the subject
sites to determine if drainage features would be considered streams using the NC Division of Water Quality Stream
Identification Method. Seventeen features were reviewed and features are labeled by Areas 1 through 8 on the attached
maps and initialed by me on June 29, 2011.
The Division of Water Quality (DWQ) has determined that the feature labeled as "Area 6, Mill Pond Road South
of Turbine B2" on the attached maps, and highlighted in blue, is considered a stream. The stream starts (N 36e 17'
34.23" W 76e 29' 50.92") at the junction of two drainage features (see attached maps) and continues down stream to the
Pasquotank River.
The other sites reviewed are highlighted in red on the attached maps and are considered *ephemeral drainage features.
The sites reviewed are as follows: Area 1 drainage feature off Sandy Road, between site 6-1 and 3-2 is considered an
ephemeral feature. The second drainage reviewed in Area I off Access Road 6, between Turbine P3 and P6 is ephemeral.
Area 2 drainage feature on Foreman Road between Turbine S36 and S35 is considered ephemeral. The second drainage
site on Access Road to Turbine S40 is also considered ephemeral.
Area 3 drainage feature crosses Access Road 3, 1-8, Access Road 2, 1-4, and Access Road 1, 1-1 all three are considered
ephemeral drainage features.
Area 4 & 5 drainage features start at crossing on Sandy Road (SR 1469) and continues up gradient, turning west along
Carl Road and ending at the end of lateral drainage ditch near 18-21. Although this feature is at the headwaters of Little
River it is not considered a stream.
North Carolina Division of Water Quality
943 Washington Square Mao
Washington, NC 27889
Phone: [phone] FAX: [phone]
Internet nww.ncwatelquafity.om
An Equal Opportunity 1 Affirmative Acton Empbyer
No a hCarolina
Amurally

Area 6 the roadway crosses a drainage features at 21-I through 21-8 and the feature is considered to be an ephemeral
drainage features. The drainage feature that runs parallel to Mill Pond Road, shown on the attached maps highlighted in
blue, is a stream feature. The stream feature starts at the junction of two drainage features and continues downstream to
the Pasquotank River (see attached maps).
Area 7 the drainage feature runs parallel to Access Road 27, culvert crossings 24-2 through 25-10 is considered to be
ephemeral drainages.
Area 8 consists of three drainage features off Access Road 32, culvert crossings 28-2 through 30-9, 30-1 and 30-2 are all
considered ephemeral drainage features.
• Please note that this Office defines the word "Ephemeral" drainage feature as meaning a feature that carries only
stormwater in direct response to precipitation with water flowing only during and shortly after large precipitation events.
Please also note that drainage feature shown on USGS map has been severely modified and many do not exist on ground
as depicted.
The owner (or future owners) should notify the DWQ (and other relevant agencies) of this decision in any future
correspondences concerning this property. This on -site determination shall expire five (5) years from the date of this
letter. Landowners or affected parties that dispute a determination made by the DWQ or Delegated Local Authority that a
surface water exists and may request a determination by the Director. A request for a determination by the Director shall
be referred to the Director in writing c/o John Domey, DWQ Wetlands/401 Unit, 2321 Crabtree Blvd., Raleigh, NC
27604-2260. Individuals that dispute a determination by the DWQ or Delegated Local Authority that "exempts" a surface
water may ask for an adjudicatory hearing. You must act within 60 days of the date that you receive this letter.
Applicants are hereby notified that the 60-day statutory appeal time does not start until the affected party (including
downstream and adjacent landowners) is notified of this decision. DWQ recommends that the applicant conduct this
notification in order to be certain that third party appeals are made in a timely manner. To ask for a hearing, send a
written petition, which conforms to Chapter 150B of the North Carolina General Statutes to the Office of Administrative
Hearings, 6714 Mail Service Center, Raleigh, N.C. 27699-6714. This determination is final and binding unless you ask
for a hearing within 60 days.
This letter only addresses stream determinations and does not approve any activity within Waters of the United States or
Waters of the State. If you have any additional questions or require additional information please call Roberto Scheller in
the Washington Regional Office at [phone].
incer 1 ,
For Co en u s
Attachments: Perquimans/Pasquotank County Soil map
USGS Chapanoke Quad maps
Aerial map
cc: DWQ 401/Wetland Express Unit
File Copy
Filename 11-0615

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Area 6, Mill Pond
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Name:CHAPANOKE
Date: 7/6/2011
Scale: 1 inch equals 1000 feet
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Location: 036' 1T 34.23" N 076' 29' 50.92" W
Caption: Atlantic Wind LLC, Desert Wind Project, Stream Determination,
Area 6, South Mill Pond Road

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SWE GROUP (7/1 9/1 1)
2-1
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shwt: 28 in
----------------------------
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_ infiltration rate:.5-1 in/hr
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DRAFT SITE MAP: DATA COLLECTION
SWE GROUP (7/19/11)
Soil Borings
TEMPORARY
Ksat 2 Test Location
_ — — — - — - shwt: 28 in
soil type: portsmouth loam
- infiltration rate:.5-1 in/hr
BASIN BMP insitu Ksat: 18.2 in/hr
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4 Test Location (SP4b)
type: portsmouth loam
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1.
Soil, Water, & Environment
Group
July 22, 2011
Mr. Salman Moazzam, PE
Fisher Associates
135 Calkins Road
Rochester, NY 14623
Soil, Water, & Environment Group, LLC
Research Building 1, Centennial Campus
1001 Capability Drive, Suite 312 • Raleigh, NC 27606
Ph# [phone] • Fax# [phone] • http://www.swegrp.com
FINAL
Re: In -Situ Hydraulic Conductivity Testing Report for Storm water BMPs — Desert Wind
(Iberdola) Project Storm water BMP sites, Pasquotank Co., NC
Dear Mr. Moazzam,
This letter report discusses field work completed at the Desert Wind (Iberdola) Project Storm
water BMP sites in July 2011 by Soil Water and Environment Group (SWE) personnel for the
four (4) proposed storm water receiver sites (temporary and permanent infiltration basins). The
information contained in this report can be used in the permit application process for a Division
of Water Quality (DWQ) storm water permit for treating water exiting the proposed project
impervious surfaces.
The site was investigated and observations were recorded about the suitability of native,
disturbed agricultural soils to receive storm water from three project BMP sites (SP1/2, SP3, and
SP4a/b) (Figures). The three BMP sites are located on a large farm at the south end of the Great
Dismal Swamp in Pasquotank County, NC. SP1, 2 and 3 are along Foreman Road and SP4 is
along Access Road 30 off of Swamp Road (SR 1214). Soil found on the site and vicinity is
characteristic of the Coastal Plain in this region of NC and soils along interstream divides.
Vegetation on the sites was managed crops (soybeans and corn) and fallow fields.
According to the NRCS Soil Survey for Pasquotank County (NRCS Soil Web, 2011) soils
present at the storm water receiver sites include, Portsmouth (Pt) and Cape Fear (Cf) series soils.
The study site contains highly disturbed agricultural soils with intensive drainage infrastructure
(perimeter and lateral ditches, and flashboard risers). Field augerings revealed soils present are
most similar to the Portsmouth loam and Cape Fear loam series soils. Portsmouth and Cape Fear
series soils consist of poor to very poorly drained, slow to rapidly permeable soils that formed
from wet sandy marine and fluvial sediments of the lower Coastal Plain.
In -situ saturated hydraulic conductivity (Ksat) measurements were performed at each BMP site
with a compact constant head permeameter (CCHP or Amoozemeter). A detailed soil profile
description was performed at each Ksat location to determine the most limiting horizon for Ksat
testing as well as other soil characteristics such as depth to ground water (GW) and seasonally
high water table (SHWT) observations (See Soil Descriptions — Appendix). The Ksat
measurements were performed at anticipated design depths and in the most limiting soil horizons
above the observed SHWT if present.

The Ksat values ranged from 1.9 to 18.2.6 in/hr (5.0 — 46.4 gpd/f 2). The hydraulic conductivities
are summarized for each BMP in Table 1. Detailed test results are in the Appendix.
Table 1: Summary of BMP sites hydraulic conductivity, Pasquotank Co, NC (July 2011)
BMP site
Depth (in.)
Hydraulic conductivit
SHWT (in.)*
G d/ft
in/hr
SP1 & SP2
16.5
260.3
17.4
28
SP3
23.6
273.3
18.3
28
SP4a
21.7
29.5
2.0
18
SP4b
21.7
256.2
17.1
26
• SHWT achieved through intensive agricultural drainage practices
The instantaneous loading rate for the soils found at SP 1-2, SP-3, and SP46 (Portsmouth series)
is found in Table 2 to be 0.5-1.0 in/hr for the given slope (0-3%). If BMP vegetation is
maintained, this rate can be increased by 25% to .625-1.5 in/hr. The instantaneous loading rate
for the soils found at SBP4a (Cape Fear series) is found in Table 2 to also be 0.5-1.0 in/hr for the
given slope (0-3%). This rate can also be increased by 25% to 0.625-1.5 in/hr, if BMP vegetation
will be maintained.
Table 2: Typical Ranges of Soil Infiltration Rates by Soil Texture and Slope (lberdola —
Desert Wind), Pasquotank Co., NC (July 2011).
Basic Infiltration Rate in/hr
Slope
Texture
0-3%
3-9%
9+%
Sands
1.0+
0.7+
0.5+
loamy sands
0.7- 1.5
0.5-1.0
0.4-0.7
sandy loams and
fine sandy loams
0.5-1.0
0.4-0.7
0.3-0.5
very fine sandy
loam and silt loam
0.3-0.7
0.2-0.5
0.15-0.3
sandy clay loam and
silty clay loam
0.2-0.4
0.15-0.25
0.1-0.15
clay and silty clay
0.1-0.2
0.1-0.15
<0.1
Source: Sprinkler Irrigation Association, Sprinkler Irrigation (1969)
1. for good vegetative cover, these rates may be 25-50% greater. For poor surface conditions, rates may be as much
as 50% less.

It appears from site data that the proposed BMP sites have potential for storm water distribution.
All four (4) BMP locations contain suitable soils with textures allowing rapid infiltration and
adequate treatment characteristics for receiving and filtering storm water before entering surface
waters. However, SP4a (Ksat 3) contains Cape Fear series soils with a shallow Ap horizon and
limiting B horizons for storm water infiltration along with a seasonal high water table soil
characteristics occurring near 18 inches of the soil surface under current drainage conditions.
These characteristics may limit the sites potential for BMP implementation due to the separation
required between the soil surface and SHWT for storm water treatment per DWQ statutes.
Additional soil material may be needed to achieve the proper depth of soil for treatment above
the seasonal high water table and allow for a higher volume of soil, retention, and infiltration
capacity.
We look forward to working with you on this project. Let us know if you have any questions
about the information and services provided to date for permitting these systems with DWQ.
Sincerely,
7 d
Scott J. Frederick, Et, NCLSS
EnJ
vironmental Scientist
Soil, Water, & Environment
Group
3216 Byers Drive
Suite B
Raleigh, NC 27607
Ph [phone]
Fax [phone]
Cell [phone]
sjfrederick a swegrp.com
www.swegrp.com
_en SOIL Srn
Cc: Mr. Samir Dumpor (NCDWQ)

APPENDIX
Figures, Soils Descriptions & Ksats

Am` Sell Invesdoadon Data Sheet
f p
Stmcture
Hodz
Depth in.
Main Colors
Mottles
Torture
Grade
Class
Type
Moist & Wet
ConsisL
Ped Coadn a
Hoizon
Bounds
Other Remarks
moist
Ap
0-8
10YR 311 v.
dark gray
sandy loam
weak
fine
granular
v. friable
-
-
sent and pepper, some fine roots
A
8-18
10YR 2/2 v.
dark brown
sandy oam
weak
fine
granular
friable
-
-
buried organic fragments 35%
Eg
18-22
10YR511 aray
10YR 411
sandy loam
weak
med
pranuflor
finable
-
Bee
122-31
10YR 6/1 ra
10YR 4/1
sandy loam
I weak
I medium
subangular
blocky
i hieble
i-
transition - SHNR
lBtg
31-36-
10YR 711 It.
1 MY
I
sandy loam
weak
medium
subangular
bloc
finable
-
tmnsitlonin toC

C up Soil Inveatioabon Data Sheet
Structure
Honz
Depth in.
Main Colors
Mottles
Texture
Gnde
Class
Moist & wet
Consist
Pod Coatings
Holxon
Boundary
Other Remarks
moist
AP
0.10
10YR 311 v.
dark gray
sandyloam
weak
fine
granular
v. finable
salt and pepper, some fine root$
A
10-18
10YR 212 v.
dark brown
sandy loam
weak
fine
granular
finable
bused organic fragments 25
Eg
18-22
10YR511 gmy
10YR 4/1
sardy loam
weak
med
granular
finable
Be
22-30
1 10YR 611 Qry
I 10YR 411
1 sandy loam
I eak
I medium
subanguiar
I blocky
I liable
I
I
itransitian - SHNR

"011
Fob,
VA
ilk
01
14

laoup mstWSoil Ieation Oats Sheet
Structure
Honz
Depth In,
Main Colors
moist
Mottles
Texture
Grade
Class
Tvve
Moist 6 Wet
Consist
Ped Coafin s
Hotzon
Boundary
Other Remarks
Ap
0.8
10YR 211
black
loam
weak
fine
granular
Mable
some fine roots
A
B-16
10YR 211
black
loam
weak
med
manular
Enable
Big
16 24+
10YR5/1 may
IOYR 6/8
clay
mod
med
subangular
blocky
firm, mod
sticky, .mod
plastic
redox morales 20% transition - SHWT 18"

~
Ny �
r
y'
f �d
'ewFey 'm r
r�
x
n P

S
Snd. Ware, c E +u® . Soil Invesho coon Dale Sheet
C P
StBcture
Horiz
Depth In.
Main CobB
Mottles
Texture
Grade
Class
Tvoe
Moist S Wet
Consist
Pod Coatings
HoHon
Boundary
Other Remarks
moist
Ap
0.6
tOYR X1 v
dark nay
sandy loam
weak
One
ranular
v. friable
well drained
A
610
tOYH 22 v.
dark brown
sandy loam
weak
fine
ranular
fnable
Eq
10-16
10YR513
brown
sandy loam
weak
med
subanguiar
blocky
fnable
Big
18-26+
1 OYR 712 It
gray
I
tancly loam
weak
medium
subanguiar
b1ccky
I fnable
I
Inansition - SH\A4

. , I
.

W = Hole depth (cm)
r= Radius d me hole (than) (cm)
n Dow. b.pvean reference level ervd soil surface (an)
D= D ltmce from the W. Whom to the Ware ae revel (hd.rs) (co)
Hi • Initial desired water depm (heed) in Yale (cm)
Wr= Rabo of head to radius of hole (must be a 5)
di = Constan -head tube xtOng, Initial d measured in hole (di = DHi) (on) - usually 1 an less than ca=lated di
dsue = Initial distance horn water xdaoe to pmund (had - Hi)
t-ON = 3-way valve tuned to 1-ON (CF = 20, mWtiply CF times A MR to obtain volume of how)
-0 2N = Sway valve tamed to 2-0N (OF = 105, mWtipty CF limes a MR to obtain vdi me of floe,)
awn = Final distance from water wdacwou e to nd (steaW state)
of = Final d measued in We (dsw, ♦ m) (an) - should W wtNn 1-2 an deli
If - Final water depth in hole (Hf = Ddt) (cm)
MR. = Initial measuring rexrvdr heading (on)
Ti = most time to record measuring reservoir level drop (min )
MRf = Final measwrq rese. readirq (on)
Tf = Final time to record measuring rexrvoir level drop (min.)
d MR = 0ha,. in measudrq mxrwir level (an)
e T- Charge in time for maaswine mxrwir water dmp (min.)
V = how volume (cd)

M = Hole depth (an)
r = Radius of the hole (dia 12) (on)
n = Diaw. Msween rafermce level are soil ow. (cm)
D = Distance from the hole Whom to me referenn level Md+m) (cm)
Hi = Initial desired water doom (head) In ole (on)
Wr = Ratio of head to radius of hole (must be a 5)
di = Constant -Mad tube setting, initial d measured in hole (di = 6Hi) (an) - usually 1 an less man oalalated of
door, = Infidel diatom. Man water surface to omond (M - Hi)
40N = 3. y valve fumed to 1-ON (CF = 20, multidv CF dmese MR to obtain volume of g )
2-0N = noway valve timed to 2-0N (CF = 105, multiply CIF lima a MR to obtain volume of Mow)
Mi Final distance from eater surface to around (steady state)
df = Final of measured in hole (den,+tat (an) should be within 1-2 an of or
Hf - Fine l ante( depth In Mb (Hf = Dog) (an)
MRi = midal measunrp reservoir reading (an)
T = linual time to lei maesunng reservoir novel drop (min.)
MRf = Final motioning mservair wading (an)
Tf = Final time M record measuring roaervoir level dap (min.)
a MR = Change in mea." reservoir level (cm)
a T = Change in time for meesunng reservoir water dap (min.)
V = Mow volume (cm)

no = Hole depth (an)
r = Radius of the hole (duin) (an)
n = Distance benveen reference level and soil sucace (am)
D = Dlslance bon the hole bottom to me rerece fenleval (hd+m) (an)
W = Initial desi ul wafer depth (head) to hole (on)
Wr= Ratio of bead to radius of hole (must be 2 5)
di = Oonslanl4beec tube falling. initial it measured in hob ids = PHi) (an) - usually 1 an less than coloda ad di
dsum = Instal disarm ham water sudere to pound (no - Hit
1-ON = 3-way valve Nmed to 1-ON (OF = 20, moMply OF limes a MR to obtain volume of aoal
2-ON = 3-way valve tumed to 2-ON (OF = 105. muddily OF times A MR to obtain volume of f mv)
our ,= Foul distance from wafer surface to ground (steady state)
of = Firal d measured m Hole (dso,+ be) (an) - should be within 1-2 e m of m
Hf - Final to, depth in mi. (Hf = i (an)
MRi - Initial measun, reservoir beading (an)
T = Initial time to reoad measuring besemolr level drop (min.)
MRf = Final measumq reunwir reading (am)
Tf = Final time W record measuring reservoir level prop (min)
• MR = Change in measuring reservoir level (an)
c T= Charge in time fo measuring reservoir water chop (min.)
V = flow volume (an'

ad = Hole depth (an)
= Radius of Me bole (Mia Q) (an)
r, = U.. beN.een reform. keel and sal surface (on)
D = Distance from the bole bottom to the reference level Md+m) (on)
HI = Inhal Marano wffier depth (bead) in Mk (an)
Wr= Ratio of band to rediue of bole (must be a 5)
Mi = CmAant-head tube swing, initial M measured in hob (di = DHi) (mg -usually 1 an Into, Man.t.Iated at
dsun is hills? distm. from ureter sudso, to around (hit - Hi)
1.ON=beay vaNaN to1-0N(CF=20,mMliply CFtimesAMRioodainvo dflaw)
2AN = awav valve fumed l02-ON (CF = 105. multioN CF times A MR to obtain vdume of flow)
it.,, = Final dare. from wale, surface o ground (Meade aMe)
of = Final d measured in hole (dup+re) (arm - Mwuld be wimin 1-2 on of at
Hf - Final water death in hole Of = D do fan)
MRi=tabel measu n,, reservoir reading(anl
T = initial Mae W reborn! ..nng..,r leval drop (mah)
MRf = Final ...a, ra.rvar reach, (an)
Tf = Final nine W re.m measuring reservcir level Map (min.)
A MR = Change in meawrin reservor Imal (an)
A T= Chenille in time for mearering reservoir enter that, (min.)
V = floe .fume (m)
a] 50.11 111a5.00

Stormwater BMPs,
Pasquotank Co,
NC (lberdola - Desert Wind). Saturated
Hydraulic
Conductivity Data (July 2011)
BMP' Soil Series
Horizon
Depth (cm)
Depth in
Ksat (cm/hr)
Ksat (in/hr)
Gpd/ft;
SHWT (in)
1 and 2 Portsmouth
B
42.0
16.5
44.2
17.4
260.3
28
3 Portsmouth
B
60.0
23.6
46.4
18.3
273.3
28
4a Rains
B
55.0
21.7
5.0
2.0
29.5
18
4b Portsmouth
B
55.0
21.7
43.5
17.1
256.2
26
' - Best Management Practice
Average
34.8
13.7
204.8
25