SW5090501_HISTORICAL FILE_20090629

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW�i�,����
DOC TYPE
El CURRENT PERMIT
❑ APPROVED PLANS
�D HISTORICAL FILE
DOC DATE
YYYYMMDD

S&ME
April 9, 2009
Murphy Oil USA
422 North Washington
El Dorado, Arkansas 71730
Attention: Mr. Dan Crawford
Reference. Seasonal 1-ligh Water Table Determinations
Proposed Murphy Express Location
Hwy 64 and Progress Boulevard
Slier City, NC
S&ME Project No. 1471-08-103A
Dear Mr. Crawford;
S&ME, Inc. is pleased to provide this report for seasonal high water table determinations
at the above -referenced site. S&ME was requested by Mr. Pov Chin with Greenberg
Farrow to perform these services in preparation for the design considerations of the storm
water management system currently being considered. The storm water quality
management system being considered is a manufactured sand trap/filter system to be located
on the southeast corner of the property in the landscaped island area as shown on the
attached site plan supplied by Greenberg ]{arrow on April 2, 2009. S&ME has conducted
these services in general accordance with S&ME Proposal No. 7409046 dated April 3,
2009.
PROJECT BACKGROUND
The project property is located on the southeast side of the intersection of US Highway
64 and an unnamed access drive to the Walmart Super. The site is currently undeveloped
and comprised of Tall Fescue grass and various weeds.
A site plan showing the approximate sand trap/ filter system was provided by Murphy
USA (MUSA) to S&MI" with the proposed site plan from the civil design firm, Greenberg
Farrow.
Regulatory guidance on requirements for permitting sand filter devices is provided in the
North Carolina Division of Stormwater Ouality — Best Management Practices Manual,
dated July, 2007, revised September 28, 2007 (NCDENR — SW — BMP). Guidance
associated with permitting sand filter devices will need to be followed as specified in the
NCDI NR— SW -- BMP.
S&ME, INC. 13718 Old Battleground Road 1 Greensboro, NC 27410 / p 336,288.7180 ! 336.288.8980 /www.si-noinc,corn

Seasonal High Water Table Determinations SBME Project No, 1471-08-103A
Murphy USA Siler City, North Carolina _ April 9, 2009
FINDINGS
Seasonal High Water Table Determinations
The seasonal high water table determinations were perlormcd on April 9, 2009 by
advancing two hand auger borings to depths ranging from approximately 35 to 37 inches
below the existing ground surface at the approximate locations shown on the attached site
platy (Figure 1).
Soils were evaluated under the guidance of a Licensed Soil Scientist for evidence of
seasonal high water table influence. This evaluation involved looking at the actual
moisture content in the soil and observing the matrix and mottle colors. Depending on
the soil texture, the soil color will indicate processes that are driven by seasonally high
water table fluctuations, such as iron reduction and oxidation and organic matter staining.
A hand auger boring profile sheet that provides a description of the observed soil
horizons and the determined seasonal high water tables has been included with this
report.
The soils at the test locations were observed to range from clay to silty clay. The
seasonal high water tables were determined to be 29 and 21 inches below the existing
ground surface at Test Locations I and 2, respectively. See "fable 1 below and Figure 1
f'or the seasonal high water table depths and test locations.
TABLE 1
TEST
LOCATION
_
SEASONAL HIGH WATER TABLE
inches below surface)
1
29 inches
2
21inches
See Figure 1 (attached) for the approximate test locations
Please note that these seasonal high water table evaluations are based on secondary
evidence and not on direct groundwater level measurements. Groundwater levels
fluctuate for numerous reasons, and these findings do not indicate that groundwater levels
have not or will not rise above the noted depths.

Seasonal High Water Table Determinations SME Project No. 1471-08-103A
Murphy USA, Siler City, North Carolina Aril 9 2009
CLOSING
S&ME appreciates the opportunity to provide these services to you. If you have any
questions, please contact its.
Sincerely,
S&ME, Inc.
AAA
Martin Mabe
Project Manager/Agronomist
cc: Barry S. Cleveland, S&ME, Inc,
Rob Willcox, L.S.S.
Natural Resources Department Manager
Attachments: Figure 1 -- Approximate Test Location Sketch
Soil Boring Profile
SA158811588 REPORTS101her Branches11471 -Spa rtanburg11471-08-103A Murphy USAISHWT Report.doc

DATE: 4-9-09 1 1 S&ME PROJECT NUMBER: 1471-08-103A

S&ME, INC.
SITEISOIL EVALUATION
Project No. ]l-i11-08--]p3R Phone No. Date:
Location � Pin _ County: 0_W6= Property Size
Proposed Facility: 1�, « _ Water Supply: On -Site Well ❑ Evaluation: Auger Boring
Described By:
Weather:
Community ❑ Pit
_ ].. n,„cLC Public ❑ Cut
!�° Antecedent Moisture Surface Water:
FACTORS
PROFILB*-
PROFILE *1 2_
PROFILE
PROFILE
Landscape Position %
�fe�i>. /_
L�
Horizon Depth 1
Color Munsell
Texture
Structure
k
F_
Consistence
!9 S
Boundary
Horizon Depth li
LV-
Color-Munsell
;2,$ iQ
Texture
Mottles
Structure
I,
Consistence
�!!. '
S
Boundary
Horizon Depth Ili
j&?_
7
Color-Munsell
SY Cr�
"Texture
Mottles
Structure
Consistence
Ae3
Boundary
Horizon Depth IV
F7-�-
Color- MunsclI
Texture
e-
Mottles
IVY27/
--_-�j
l JQ�i�7//
Structure
Consistence
Boundary
Soil Wettiess
ri
Restrictive Horizon
Saprolite
LIAR
Classification
���
LEGEND
LANDSCAPE POSITION
R
Ridge Intcriluve
S
Shoulder
L
LinearSlopc
FS
Foot Slope
N
Nose Slope
II
Ilead Slope
Cc
Concave Slope
Cv
Convex slope
T
Termce
P
Flood Plain
,rEXTURF,
s
sand
Is
Loamy sand
sl
sandy loam
1
loam
si
silt
sil
silt loam
sicl
silty clay loam
Cl
clay loam
scl
sandy clay loam
sc
sandy clay
sic
silty clay
c
clay
CONSISTENCE
WFT
Ns non -sticky
Ss slightly sticky
S sticky
Vs very sticky
Np
non-plaslic
Sp
slightly plastic
P
plastic
Vp
very plaslic
MOIST
vfr
Veiy triable
fr
friable
fi
firm
Vr
Very firm
STRUCITRE
sg
single grain
m
massive
cr
annnh
gr
gaanular
shk
subangularhlocky
abk
angular blocky
pi
platy
pr
prismatic

♦r .:m
1
DRAINAGECALCULATION G REPORT
ff @-9-0 wIN
MAY 1 3 2009
Murphy USA — Siler City
Project # 20070551.8
May G, 2009
MURPHY USA - SILER CITY
U.S. HIGHWAY 64
SILER CITY
NORTH CAROLINA
GF PROJECT No. 20070551.8
May 6, 2009
PREPARED BY: �.►�'
GREENBERG FARROW
1430 WEST PEACHTREE STREET NW
SUITE 200, ATLANTA, GA 30309
T: 404-601-4000
F: 404-601-3980
COA: C-2561
.� O
=p.�'Essio�.�
SE f' _
o
' NO
5

•
INDEX
1 Stormwater Management Stud
1. Project location and Description
2. Pre -developed conditions
3. Post -developed conditions and proposed drainage strategy
4. Design criteria and Calculations
2 Appendix
• Sand Filter Supplement
• WQv Pond: Vertical Filter Drawdown Calculations
• Precipitation Intensity Estimates Table from NOAA
• Hydrograph Summary Report
• Hydrograph Report
• Pond Report
Muiphy USA — Siler City
Project # 20070551.5
May 6, 2009

I STOMWATER MANAGEMENT STUDY
1.1 Proiect Location and Description:
The proposed project site is located immediately east of the Wal-Mart Shopping Center on the south side
of U.S. Hwy 64 approximately 1000 feet east of U.S. Hwy 421 in the Town of Siler City, Chatham
County, North Carolina. The proposed site is approximately 0.826 acres of undeveloped land and would
require approximately 1.19 acres of disturbed area to build 1,200 SF c-store, 8 gasoline pump islands,
associated 10 parking spaces, and a shared driveway with adjacent future development. The property is
adjacent to the east and south by the undeveloped lots, to the west by Wal-Mart entrance driveway, and
is bordered to the north by U.S. Highway 64.
1.2 Pre -Developed Conditions:
The existing site is relatively flat, grassed, and clear of mature trees. The 1.19 acre disturbed area is a
part of a larger +/- 500 acre drainage basin that discharges into an unnamed tributary of Love's Crcek
downstream draining into Rocky River in Cape Fear River Basin. The proposed site is located at the
lower end of this drainage basin. Currently there is a 24" RCP outlet with headwall on the site and all
storm water run-off, including on and offsite, drain to the south to a tributary of Love's Creek
1.3 Post -Developed Conditions and proposed drains a strate
The project will add approximately 0.76 acre (33,428 Square Feet) impervious areas.
Although, the amount of impervious area has increased, the project site is relatively small and has a
much shorter time of concentration when compared to the overall basin. The shorter time of
concentration results in a peak discharge that occurs at an earlier time than the peak discharge of the
overall basin. Thus, the peak discharge of the overall basin will remain unchanged and a separate
detention facility for this site will not be necessary.
However, since the proposed development will add approximately 64% of impervious area and the
disturbed area will be more than 1 acre, a storni water quality treatment system, a sand filter, will be
installed in a landscape island at the south of the property by the proposed entrance driveway. The sand
filter consists of 624 C.F. volume of sedimentation chamber and 1,496 C.F. volume of sand filter
chamber treating 2,120 C.F. storm water run-off in total which exceeds the required WQv of 1,996 C.F.
In conclusion, due to the installation of the WQv treatment system and the fact that the project site will
peak much sooner than the overall drainage basin, down stream properties will not be adversely affected
by the proposed development.
Murphy USA — Siler City 3
Project # 20070551.8
,\9ay 6. 2009

1.4 Design Criteria and Calculations:
✓ WQv Calculations
Drainage Area (Disturbed Area) = 52,260/43,560= 1.199 ac
Impervious Area-- 33,428 / 43,560= 0.767 ac
Ratio of impervious area to drainage area= 33,428 / 52,260= 0.639 (64%)
Rv= 0.05 + 0.9 * 0.64= 0.626
WQv= 0.626 * 52,260 * 1 / 12= 2,726 cf
Adjusted WQv = 0.75 * 2,726= 2,044 cf
✓ Pre -development !},ear 24 hour run-off.
I year 24 hour intensity: 0.12 in/hr
Run-off coefficients (C): Lawn, Clay Soil, average 2-7%= 0.22
Therefore, Pre -development Q= C * 1 * A= 0.22 * 0.12 * 52260 / 43560= 0.03 cflsec
✓ Post -development I year 24 hour run-off
➢ Peak Flow Rate before WQv pond routing
Run-off coefficients C)
Post impervious area= 0.76 acres with C= 0.95
Post pervious area= Lawn, Clay Soil, average 2-7%= 0.43 acres with C= 0.22
Weighted C= 0.68 -) 0.7
Therefore, Post -development (before pond routing) Q
= C * I * A= 0.7 * 0.12 * 52260 / 43560= 0.1 cflsec
Peak Flow Rate after WQv pond routing
Pond drawdown rate calculation
Filter permeability (K) = 3.5 fUday= 0.15 ft/hi= 1.8 in/hr
Total drawdown time for 24 inches= 16.61 hours by Darcy's equation
Average Rate (in/hr) = 24 / 16.61= 1.445 in/hr --> 1.45 in/hr
Use 1.45 in/hr for exFiltration rate (more conservative)
Post -development (after pone! routing) Q= 0.03 cflsec calculated
by Hydrotlow Hydrographs
Murphy USA — Siler City 4
Project # 20070551.8
tMay 6, 2009

2 APPENDIX
Murphy [SSA --- Siler City
Project # 20070551-S
May 6, 2009

Permit Number:
SwrJQQf}sb( (to be provided by DrNQ)
O� �pTEA
O� �G
r
AA7
NCDENR Q Y
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
SAND FILTER SUPPLEMENT
This form must be filled out on line, printed and submitted with at! of the required information,
Make sure to also fill out and submit the Required Items Checklist (Section III) and the I&M Agreement (Section IV)
ItPROJECT.INF,ORMATIONa ,, , , ��:, n ��
V,A$�a € ii r O s G�. ,Ju.a.'r�<_0.�' i.;,yd.i Sm'9:' rs,1'S .x 5a��� ,r
Project name MURPHY OIL USA - SILER CITY
Contact name JOSH Y00
Phone number 404-601-4000
Date April 27, 2009
Drainage area number 1
II.-DESIGNiINFORMATION F.,
Site Characteristics
Drainage area (AD) 52,260.00 ft2 OK
Impervious area
Impervious (IA)
Design rainfall depth (FRO)
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 (WQVAdi)
Volume contained in the sedimentation basin and on top of the sand filter
Maximum head on the sedimentation basin and sand filter (hmaxFller)
Average head on the sedimentation basin and sand filter (hA)
Runoff Coefficient (Rv)
Type of Sand Filter
Open sand filter?
If this is an open sand filter; The clearance between the bottom of the sand
filter and the SHWT (dshwT)
Closed/pre-cast sand filter?
If this is a closed sand filter. The clearance between the bottom of the sand
filter and the SHWT (dSHWT)
If this is a closed, underground closed sand filter: The clearance between
the surface of the sand filter and the bottom of the roof of the underground
structure (dspace)
33,428.00 ft 2
64.0% %
1.00 in
2.88
in
0.12
inlhr
0.03
ft3lsec
0.03
ft3lsec
0.00
ft3lsec
2,724.85 ft'
2,043.64 ft' OK
2,128.00
2.00 ft OK
1.00 ft OK
0.63 (unitless)
Y YorN
2.00 ft
N YorN
Form SW401-Sand Filler-Rev.4 Parts I and II. Project Design Summary, Page 1 of 3

Permit Number, D�/
(to be provided by DWQ)
Sedimentation Basin
OK. Meets minimum, but may need to be increased to
Surface area of sedimentation basin (As) 316.00 f12 contain the required volume if error under Storage
Volume section.
Sand Filter
OK. Meets minimum, but may need to be increased to
Surface area of sand filter (Ar) 748.00 ft 2 contain the required volume if error under Storage
Volume section.
Depth of the sand media filter bed (dr) 1.50 ft
Coefficient of permeability for the sand filter (k) 3.50 (ft/day)
Time to drain the sand filter (t) 40.00 hours OK. Submit drainage calculations.
Time to drain the sand filter (t) 1.67 days
Additional Information
Does volume in excess of the design volume bypass the sand filter?
Y
Y or N OK
Is an off-line flow -splitting device used?
Y
Y or N OK
Does volume in excess of the design volume flow evenly distributed through a
Y or N
vegetated filter?
/V/�
What is the length of the vegetated filler?
1V1,4 ft
Does the design use a level spreader to evenly d}stribute flow?
6
Y or N
is the BMP located at least 30ft from surface waters (50ft if SA waters)?
Y
Y or N OK
If not a closed bottom, is BMP located at least 100ft from water supply wells?
Y
Y or N OK
Are the vegetated side slopes equal to or less than 3:1
IVIA
Y or N
Is the BMP located in a recorded drainage easement with a recorded access
Y
Y or N OK
easement to a public Right of Way (ROW)?
What is the width of the sedimentation chamberlforebay Ald)?
9.00 ft
OK
What is the depth of sand over the outlet pipe?
1.50 ft
OK
Figure 1: Open Sand Filter
heJirnrrrtafiuu Nan
J Fillcr
{."r Fost?1)n •j
i+k-Situ 5��i1 tir:+��.�nsfl�hiTTicl+ �S"nlrrT:+Llr
.............
Form SW401-Sand Piher-Rev.4 Pails I and II. Project Design Summary, Page 2 of 3

Figure 2: Closed Sand Filter
Permit Number:
51A/"5bl (to be provided by D 1W)
%Veiv
F1 0 v"
Mow
.hnchual moles iall)
Li-S1111 Sod
Sc.'Ioilably Hi.-'h
Wafci Table
W'Itc).
(AlectcA
Coves- Cil.'kfrS
Sllid
o Pipc
. .... ...............
Z
........... ..........
F
........................sty
... .......... .....
: ( 6WT
I Sand filicj' chmill,ci. Chintbel. 41r-i
JfffhVj'
Otlprics'
Form SW401-Sand Filter-Rev.4 Parts I and R. Project Design Summary, Page 3 of 3

WQV POND: VERTICAL FILTER DRAWDOWN CALCULATIONS
USING DARCY'S EQUATION
Project Name: MURPHY OIL NORTH CAROLINA Date: 5-May-09
Project Number: 20070551.8
BASIN INFORMATION FILTER PIPE INFORMATION
Filter permeability (K) (ft/hr):
0.15
Filter permeability (K) (ft/day):
3.50
Factor of safety:
1,00
Gravel envelope factor:
1.00
Adjusted Filter permeability (K) (ft/hr):
0.15
Top of treatment volume elev:
544.00
Bottom of treatment volume elev:
542.00
Number of increments:
8.00
DARCY'S EQUATION
O = KiA i = H/D
t = V/Qave
Total drawdown time = sum of drawdownYtimes for each increment
POND INCREMENTAL DRAWDOWN CALCULATION
Length of Pipe (L) (ft):
20.00
Pipe diameter (d) (in):
6.00
Number of pipes:
2.00
Gravel envelope (in)
3.00
Pipe invert elevation:
541.5
Depth of filter media (D) (ft):
1.50
Area of filter media (W) (ft^2):
748.00
Manning's n
0.016
Sloe (5)(ft per ft):
0.0020
MANNING'S EQUATION
Q = A'(1 A861n)`R^(2/3)'S"(1/2)
R=A/P 777771
Elevation
(ft)
Storage
(cf)
Storage
increment (V)
(cf)
Change in
Elev. (H)
(ft)
Hydraulic
Gradient
(i)
Avg. Filter
Flow Area (A)
(sf)
Instantaneous
Discharge (Q)
(cfh)
Avg. Discharge
per Increm.
(Oave)
(cfh)
Drawdown Time
per Increm.
M
(hrs)
544.00
1496
2.38
1.58
748.00
172,72
149.6
165.44
0.90
543.80
1346A
2.17
1.45
748.00
158.17
224.4
147.26
1.52
543.50
1122
1.88
1.25
748.00
136.35
224.4
125.45
1.79
543.20
897.6
1.58
1.05
748.00
114.54
224.4
103.63
2.17
542.90
673.2
4.27
0.85
748.00
92.72
224.4
81.81
2.74
542.60
448.8
0,98
0.65
748.00
70.90
224.4
60.00
3.74
542.30
224A
0.67
0.45
748.00
49.09
224.4
60.00
3.74
542.00
0
0.38
0.25
748.00
27.27
TOTAL
DRAWDOWN (IN).,�24
DOToFal
Drawdown time;(h€) 16 61
iy Av Rate in/h� .1:445
UNDERDRAIN PIPE CAPACITY CALCULATION
Single Pipe Combined Pipe Maximum Maximum
Single Pipe Single Pipe Hydraulic Capacity capacity Discharge Discharge
Area (ft"2) Perimeter (ft) Radius ( R) (cfs) (cfs) (Q) (Cfh) (0) (Cfs)
0.196 1.571 0.1250 0,204 0.41 165.44 0.05
Capacity exceeds maximum discharge
Pipe design is acceptable

POINT PRECIPITATION r' r, \,
FREQUENCY ESTIMATES r
`y'' , FROM NOAA ATLAS 14 �
SILER CITY 2 S, NORTH CAROLINA (31-7924) 35.7606 N 79.4622 W 498 feet
from "Precipitation -Frequency Atlas of the United Siates" NOAA Atlas t4, Volume 2, VttSion 3
G.M. Bounin, D. Martin, B. Lin, T. Parzybok, M.Yckta, and D. Riley
NOAA, National Weather Service, Silver Spring, Maryland, 2004
Extracted.- Tue May 5 2009
Confidence Lifni�s` Seasonality , ! Location Maps Other Info GIS data Maps Does Return Io State Map
Precipitation Intensity Estimates (in/hr)
ARI *
I!I
li
-
3U 6ll
-
ZE
Cr hr
!2 hr
21 hr
d8 hr
4
-
7
ID
-Hurtnthtmin
11
30 4�
till
mm
dal
r}a�'
day_
day' day
rim
I _
14.9G
3.96
3.30
2.26 1.41
0.84
0.60 0.36
0.21
O.12
D.O7
0.04
003
0.02
O.OI
O.OI 0.01
0.01
0 5.88
4.70 3.94 2.72 1.71 1.02 0.73 OF447 0.26
0.15
0.09 0.05 0.03
0.03 0.02
O.OI 0.01 O.OI
06.83 5.47 4.61 3.27 2.10 1.27 0.91 0.55 0.32 0.19 0.1E 0.06 0.04 0.03 0.02 0.02 O.DI O.OI
10 7.4G 5.97 5.03 3.65 2.37 1.45 1.04 0.63 0.38 0.22 0.13 0.07 0.04 0.03 0.02 0.02 0.01 001
25 86.50 .16 5.50 4.07 2.71 7 1.61.21 0.74 0.44 0.26 0.15 0.08 0.05 0.04 0.03 0.02 OA2 0.01
50 8.62 6.86 5.79 4.36 2.96 1.84 1.34 0.82 0.50 0.29 0.1 G 0.09 0.06 0.04 0.03 O.D2 0 02110.02
f 00 9.02 7.16 6.04 4.G2 3.19 2.01 1.47 0.91 0.56 0.32 0.18 D.10 0.06 0.05 0.03 0.02 0.02 0.02
20D 9.35 7A1 G.23 4.85 3.40 2.17 ].60 1,00 0.62 0.35 0.20 O.11 0.07 0.05 0.03 0.03 0.02 0.02
500 9.68 7.GG G.43 5.12 3.67 2.38 1.77 ].l2 0.70 0.40 0.2E 0.12 0.0R O.OG D.04 0.03 0.02 OA2
1000 tJ.92 7.81 G.54 5.29 3.86 2.53 L91 1.21 0.77 OA4 0.25 0.14 0.09 0.0G 0.04 0.03 0.02 0.02
"These precipitation frequency estimates are based on a paRial_duraUOn eri ARI is the Average Recurrence Interval.
Please refer to NOAA Adas 14 Document for more inlomraiion- NOTE: Formatting forces estimates near zero to appear as zero.
* Upper bound ol'the 90% confidence interval
Precipitation Intensity Estimates (in/hr)
45fiU2
2448d7 20A1
years) min min min min minI2U hrhr da30
(Jay day53
nFh r
5.44 4.34 3.62 2.48 L55 0.93 0.6G 0.40 0.23 0.13 0.08 0.04 0.03 0.02 0.02 OAl 0.01 O.QI
6A6 5.16 4.32 2.99 1.87 1.13 0.80 0.48 O.E8 0.16 0.09 0.05 0.03 0.03 0.02 O.OI O.OI 0.01
7.48 5.99
5.05 3.59 2.30 1.40 ].00 D.60 0.35 0.20 0.12 OF067 O0.04 0.03 0.02 0.02 0.01 0.01
IU 8.16 G.53
S.SO 3.99 2.60 1.59 1.I4 0.G9 0.4] 0.23 0.13 0.07 O.OS 0.04 0.02 0.02 0.02 O.OI
25 8.93 7.11
6.O1 4.45 2.9G 1.84 1.32 0.80 0.48 0.28 O. S G O- 0.06 0.04 0.03 0.02 0.02 0.01
50 9.42 7.50
G.33 4.77 3.23 2.02 i.47 0.90 0.54 0.31 0.18 0.1 O0.0G 0.05 0.03 0.02 O.D2 0.02
100 9.8fi 7.84
6.G0 5.06 3.48 2.20 l.G] 099 0.60 0.34 0.20 D.1 [ 0.07 0.05 D.03 0.03 0.02 0.02
200 1D.24 8.11
6.82 5.31 3.72 2.38 L75 1.08 0.G7 0.38 0.22 0.12 0.07 0.06 0.04 0.03 0.02 0.02
500 ]0.61 $.39
7.04 5.60 4.02
2.61 ].94 1.21 0.76 0.43 0.24 0.13 0A$ O.06 0.04 0.03 0.02 0.02
7.1G 5.8D 4.23
1000 HEED
2.79 2.09 ].32 0.83 0.47 0.27 0.15 0.09 0.07 0.04 U.03 0.02 E2]
The upper bound of the confidence interval at 90% confidence level is the value which 5%of the simulated quantile values for a given frequency are greater than,
" These precipitation frequency estimates are based on a partial -0uraGgn Beni AR) is the Average Recurrence Interval.
Please refer to NOAA .Adas 14 Document for mare information. NOTE: Formatting prevents estimates near zero to appear as zero.
* Lower bound of the 901% confidence interval
Precipitation Intensity Estimates (in/hill
ARI** 5 IO Ii 30 60 I211 i M6, 1224 4ti 4 7 IU 20 EO 45 60
ntin ntiu ruin min min hr hr hr hr day day day day 11 day Ij d., 11 cl. '
�4.54 3.G2 3.02 2.07 1.29 0.77 0.55 07337 0.20 U.i2 0.07 0.04 0-03 U.02 0.01 0.01 O.OI 0.01
�2 5.3H 4.30 3.G0 2.49 1.56 U.94 Q67 0.40 0.24 0.14 O.OR 0.05 0.03 0.02 0.02 0.01 0.01 0.01
3 6.24 4.99 4.21 2.99 1.92 1.16 0.83 0.50 0.30 0.17 0.10 0.06 0.04 0.03 0.02 0.02 0.01 6.01
10 G.80 5.44 4.59 3.33 2.17 1.3 ] 095 O.S7 0.34 0.20 O.12 0.06 0.04 0.03 0.02 0.02 0.01 0.01
25 7.40 5.90 4.98 3.69 2.4G 1.5i 1.09 O.G7 0.40 0.24 U.14 0.08 0.05 0.04 0.02 0.02 0.02 0.01
50 7.79 G.20 5.24 3.94 2.G7 1.66 1.21 0.74 0.45 0.27 0.15 0.05 O.US 0.04 0.03 0.02 0.02 0.01
1 00 E1j 6.44 5.43 4.16 2.87 EE Ej 0.81 0.50 0.30 O.17 0.09 0.06 0.05 0.03 0.02 0.02 0.02
200 8.3G 6.63 EE 4.34 3.64 i.92 1.42 0.88 0.54 0.33 0.19 0.10 0.06 0.05 0.03 0.02 0.02 U.U2
SOD 8.59 G.80 5.7U 4.54 3.25 2.08 1.55 07977 0.60 0.37 0.21 0.11 0.07 0.05 0.03 0.03 0.02 0.02
111U0 8.72 G.87 5.75 4.G6 3.40 2.20 I .GS Lp4 0.G5 0.40 0.22 0. ] 2 O.OR D.OG 0.04 0.03 U.02 U.02
The lower bound of the confidence interval at 90% confidence level is the value which 5% of the simulated quantile values for a given frequency are less than,

"These i frequency estimates are based on a partiai-dufalion maxima series. ARI is the Average Recurrence Interval.
Piease relar to NOAA Alas 14 Document for more information. NOTE: Formatting prevents estimates near zero to appear as zero.
Tex,t, version of tables
Partial duration based Point IDF Curves Version: 3
35.7606 N 79.4622 W 498 ft
10
.. .. . ........... ..... .. ... .. .. ... .. .
. ..... ... .... .. .. ... ......
2 ..... ... ... .....
... .... - - ------- - - ..... . . . . . . ......... ...... . .. ..... .. ...
9.3
0.2
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a
02 . ........ -
. . ... ... .. .. ... ..
L
.001
E L L L L L L L L :P 31 ZX-
Z C Z Z -C C C C r M -0 M M M a
I I) W, In Or 0, 0, to Ja J. M
- - C1 10 a, Duration
Tue Mau 05 1201:41 2009
Maps -
Average Recurrence Interval
(years)
I - Lj N i F.
'L .''Jor r 100-year
IB-year 500-gear
a, 1000-klear
i ?O-W i 18-W loii-w CIO I- W 80 11 W
70"W
These maps were produced using a direct map request from The
lAeppmg and -Caj,,Ogiai Resources
Tiger.Map Sower.
ple"Se , rad fo, ",.,c i,,Jb, ""nio';
Z

LEGEND
-- State --- Connector
County Stream
Indian Resv r k,":; Mi 1 itary Area
LakelPondlocean 7 National Park
— Street Other Park
---- Expressway C i ty
— - Highway .0 .2 C.Vnty,6 .8 rai
Scale 1:228583 1 z 11
*average --true scale depends on monit.r.resolution
79,t; 'W 74_!9"'W 79.4"W
Other Mapsll'hotographs -
View USES digital ortho hwo gtla(tram-.le {[)OO covering this location from TerraServer, USGS Aerial Photograph may also be available
from thss site. A DOQ is a computer -generated image of an aerial photograph in which image displacement caused by terrain relief and camera
tilts has been removed. [t combines the image characteristics of a photograph with the geometric qualities of a map. Visit the 115C�5 for more information.
Watershed/Stream Flow Information -
Find the Watershed for this location using the U.S. Environmental Protection Agency's site.
Climate Data Sources -
Precipitation frequency resells are based on darn front a variety ofsources, but largely NC_DC. The following links provide general information
about obser%ing sires in the area, regardless of if their data was used in this sttrrly. For detailed it forinalion abora the stations used in this study,
please refer to N7.4.g_ Was 14 Document.
Using the .ational Climatic Ce3lter's ( CDC) station search engine, locate other climate stations within:
+/-30'minutes .,.OR... +1-1 degree Iof this location (35.76061-79.4622). Digital ASCII data can be obtained directly from iVCDC'
Hyslrotnrteorologiral Design Studies Center
DOClNOAAlNational Weather Se ire
1325 East-West tlighsvay
Silver Spring, AID 20910
[phone]
Questions?: lir1.0 114CuiDns`u;no;�a. eor
Diaclmnle�

Hydrograph Summary Re po gydratlow Hydrographs Extension for AutoCAD® Civil 3D® 2008 by Autodesk, Inc. v6.052
Hyd.
No.
Hydrograph
type
(origin)
Peak
flow
(cfs)
Time
interval
(min)
Time to
peak
(min)
Hyd.
volume
(cult}
Inflow
hyd(s)
Maximum
elevation
(ft)
Total
strge used
(cult)
Hydrograph
description
1
Rational
0.031
1
720
1,357
------
------
------
PRE -DEVELOPED
2
Rational
0.100
1
720
4,318
------
------
------
POST -DEVELOPED
3
Reservoir
0.030
1
968
205
2
544.00
2,132
POST WQV POND ROUTE
SILER CITY MURPHY OIL.gpw
Return Period: 1 Year
Tuesday, May 5, 2009

2
Hydrograph Report
Hydraflow Hydrographs Extension for AutoCADS Civil 31)® 2008 by Autodesk, Inc. v6.052
Tuesday, May 5, 2009
Hyd. No. 1
PRE -DEVELOPED
Hydrograph type
= Rational
Peak discharge
= 0.031 cfs
Storm frequency =
1 yrs
Time to peak
= 12.00 hrs
Time interval =
1 min
Hyd. volume
= 1,357 cuft
Drainage area =
1.190 ac
Runoff coeff.
= 0.22
Intensity =
0,120 inlhr
Tc by User
= 720.00 min
IDF Curve
= SILER CITY.IDF
Asc/Rec limb fact
= 1/1
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0 oa
0 2 4
-- Hyd No. 1
PRE -DEVELOPED
Hyd. No. 1 -- 1 Year
6 8 10 12 14 16 18 20 22 24
Time (hrs)

41
Hydrograph Report
Hydraflow Hydrographs Extension for AutoCADO Civil 3D(D 2008 by Autodesk, Inc, v6.052
Tuesday, May 5, 2009
Hyd. No. 2
POST -DEVELOPED
Hydrograph type =
Rational
Peak discharge
= 0.100 cfs
Storm frequency =
1 yrs
Time to peak
= 12.00 hrs
Time interval =
1 min
Hyd. volume
= 4,318 cult
Drainage area =
1.190 ac
Runoff coeff.
= 0.7
Intensity =
0.120 in/hr
Tc by User
= 720.00 min
IDF Curve =
SILER CiTY.IDF
Asc/Rec limb fact
= 1/1
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03 i
0.02
0.01
000
0 2 4
--- Hyd No. 2
POST -DEVELOPED
Hyd. No. 2 -- 1 Year
6 8 10 12 14 16 18 20 22 24
Time (hrs)

Hydrograph Report
Hydraflow Hydrographs Extension for AutoCADS Civil 3D® 2008 by Autodesk, Inc. v6.052 Tuesday, May 5, 2009
Hyd. No. 3
POST WQV POND ROUTE
Hydrograph type = Reservoir Peak discharge = 0.030 cfs
Storm frequency = 1 yrs Time to peak = 16.13 hrs
Time interval = 1 min Hyd. volume = 205 cult
Inflow hyd. No. = 2 - POST -DEVELOPED Max. Elevation = 544.00 ft
Reservoir name = PROPOSED WQV POND Max. Storage = 2,132 cult
Storage Indication method used. Exfiltration extracted from Outflow.
Q (cfs)
0.10
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
000
0.0 2.0
_Hyd No. 3
POST WQV POND ROUTE
Hyd. No. 3 -- 1 Year
6� aNF
�,; a of 6.Y
0 � �''4 €S � 6 k�6
fi E s 1 yp 4 •m i s E � �� �`zya'%� ri fY fi � ��� s� tr�'�� H'•
�.s
y�
3.4
-
9.e t .
4.0 6.0 8.0
Hyd No. 2
10.0 12.0 14.0 16.0 18.0
Total storage used = 2,132 tuft
20.0
Time (hrs)

, .Pond Report
Hydraflow Hydrographs Extension for AutoCADO Civil 3DO 2008 by Autodesk, Inc. v6.052
Tuesday, May 5, 200£
Pond No. 1
- PROPOSED
WQV POND
Pond Data
Contours - User -defined contour areas. Conic method
used for volume
calculation. Begining Elevation = 542.00 ft
Stage 1 Storage
Table
Stage (ft)
Elevation (ft)
Contour area (sgft)
Incr. Storage (cuff)
Total storage {cuff)
0.00
542.00
1,064
0
0
1.00
543.00
1,065
1,064
1,064
2.00
544.00
1,066
1,065
2,130
3,00
545.00
1,067
1,066
3,196
Culvert 1 Orifice
Structures
Weir Structures
[A]
[131
[C]
[PrfRSr]
[A] [B]
[C]
[D]
Rise (in)
= 18.00
0.00
0.00
0.00
Crest Len (ft)
= 12.00 0.00
0.00
0.00
Span (in)
= 18,00
0.00
0.00
0.00
Crest El. (ft)
= 544,00 0.00
0.00
0.00
No. Barrels
= 1
0
0
0
Weir Coeff.
= 3.33 3.33
3.33
3.33
Invert El. (ft)
= 536.70
0.00
0.00
0.00
Weir Type
= Riser ---
---
---
Length (ft)
= 30.00
0.00
0.00
0.00
Multi -Stage
= Yes No
No
No
Slope (%)
= 1.00
0.00
0,00
nla
N-Value
= .013
.013
.013
nla
Orifice Coeff.
= 0.50
0.60
0.60
0.60
Exfil.(inlhr)
= 1.450 (by Contour)
Multi -Stage
= nla
No
No
No
TW Elev. (ft)
= 0.00
Note; Culvertl0rifice outflows are analyzed under inlet (ic) and Bullet (oc) control. Weir risers checked for orifice conditions (ic) and submergence (s)
Stage l Stage 1 Discharge
3.00
2.00
1.00
swirl
Elev (ft)
545.00
544.00
543,00
542 00
0.00 2.00 4.00 6.00 8,00 10.00 12.00 14.00 16.00 18.00 20,00
------ Total Q Discharge (cfs)

rd
IDate Received
Fee Paid
Permit Number
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM ,
This form may be photocopied for use as an original 1.
I. GENERAL INFORMATION r
1. Applicants name (specify thi name of the corporation, individual, etc. who owns the project):
C.
2. Print Owner
Officia"s ttaipe and title (person.legally responsible for facility and compliance):
Pil +tar fr7'yh�'i'
I Mailing Address for person listed in itern 2 above:
City: nzdo — _ State:�� zip: ,7Zz7�1 ^_
i'hone: (': r-I` la�/ -- — pax:
Email:
4. Project Name (Subdivision, facility, or establislunent name -should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Z(/urj6v Diw muif --- v%/ter C'
5. Location of Project (street
City:s
County:
6. Directions to project (from t:7 st n1; or intersection):
L atltude.,V- 44 Pl- Longitude:
go
" W of project
8. Contact person
�-w- ho'can answer questions aoout the project:
Name: �J /�S// � "F:lel�h ,�►v Phiniber:
Email: 1 OO AQ
II. PERMIT INFORMATION:
1. Specify whether project is (cherk nr<_)• i .tip �_ 1;i.,t. vv_ ! ❑%loaific4tion
Forin SWU-101 Version 09.25.08 ,' :.: ; ::"

2. If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number /t/ZA — and its issue date (if known)
3. Specify the type of project (check one):
❑Low Density [High Density ❑Redevelop ❑General Permit ❑Universal SMP ❑Other
4. Additional Project Requirements (check applicable blanks; information on required state permits can be
obtained by contacting the Customer Service Center at I-877-623-6748):
❑CAMA Major Sedimentation/Erosion Control ❑404/40I Permit ❑NPDES Industrial Stormwater
III. PROJECT INFORMATION
1. In the space provided below, summarize how stormwater will. be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
2. Stormwater runoff from this project drains to theGCVC/71�'V River basin.
3. Total Property Area: /9/ojacres 4. Total Coastal Wetlands Area: 0 acres
5. -Total Property Area (3) — Total Coastal Wetlands Area (4) = Total Project Area**: 19 acres
6. (Total Impervious Area / Total Project Area) X 100 = Project Built Upon Area (BUA): %
7- How many drainage areas does the project -have?_
8. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
For high density prbiects, complete the table with one drainage area for each eneineered stormwater device.
n nfa .,.,,�, ' _
EREKww -
.r �e qy� ._nu...�gv: ay. '+
*, . ► r e reiving
,•�xp r�.�nY-�:r�.,w:.��+rt4''r'}p�,g
Stream Name
G % ter
Stream Class & Index No.
Class / — 4-3 69
Total Drainage Area (sf)-2
On -site Drainage Area (so
Off -site Drainage Area (so
Existing Impervious* Area (sf)
Proposed Impervious*Area (so
33 /2
% Impervious* Area (total)
���t Y i'.F'. �. �IYr� ��'Ki-,p,-y�f
rnperv{�ofs;�urfaceArca
� .c yir ' '- i � K 1 - } t
µ ,- ; T rauagefAa1= -..1
'.i i ,rW..+1(Y x1 N' _ i' -•S
D�r_a�nage Area_2G `;
On -site Buildings (so
/ zoo
On -site Streets (sf)
f O
On -site Parking (sf)
On -site Sidewalks (sf)
Other on -site (sf)
_5!`� 9
---.- r - — - -
Off -site (sf)
Total (so:
/p
­3g, 41o,65—
r impervious area is defined as the built upon area including, but not limited to, buildings, cr;., pal.:_,rrr
.sidewalks, gravel areas, etc.
*`Total project area shall be calculated to exclude Coastal Wetlands from use wren calcni!z'i:t ;'ire 'd;'le.Yr�t:C:
percentage calculation. This is the area used to calculate overall percent project Sir; ' ;' r 1}.
:,orrn.SWiJ-10E Version 09.25.08 Page 2 off _

t: -a
.�i
9. How was the off -site impervious area listed above derived?
tomC►��S y/"' '"�
Y "5ens�Z�t��'!7/ ���'c� J/1 I -A plaxv
Projects in Union County' Contact the DWQ Central Office staff to check to see if you project is located
within a Threatened & Endangered Species wdlersh`e'd IfidW nay be subject to more stringent stormwater
requirements.
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
One of the following property restrictions and protective covenants are required to be recorded for all
subdivisions, outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table
listing each lot number, size and the allowable built -upon area for each lot must be provided as an attachment.
Forms can be downloaded from htt : t2o.enr.state.nc.uslst1&mu forms.htm - deed restrictiQns.
Form DRPC-1
High Density Commercial Subdivisions
Form DRPG-2
High Density Developments with Outparcels
Form DRPC-3
High Density Residential Subdivisions
Form DRPC-4
Low Density Commercial Subdivisions
Form DRPC-5
Low Density Residential �;ubdivisicns
Form DRPC-6
Low Density Residential Subdivisions with Curb Outlets
By your signature below, you certify that the recorded property restrictions and protective covenants for this
project shall include all the applicable. items required in the above form, that the covenants will be binding
o1wall 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.
V. - SUPPLEMENT FORMS
The applicable state stormwater management pemnit.supplentent form(s) listed below nuist be submitted for each
3MP specified for this project. Contact the Stormwater Permitting Unit at [phone] ftir the status and
availability'of these forms. Forms can be downloaded from htt� 1(`i2o_e�tr.st�te.nc usjVLb Ls.htm.
1-orrn SW401-Low,Density
Form-SW401-0nrb'Outlet System
Form'SW401-Off-Site System
Form SW401-.Wet Detention Basin
Form SW401-Infiltration Basin
Form SW401-Infiltration Trench
Form SW401-Bi6retention Cell
Form'SW401-Level Spreader
Form SW401-Wetland
Form SW401-Grassed Swale
Form SW401-Sand Filter
Form SW401-Peiriteable Pavement
Form SW401-Cistem -
Low Density Supplement
Curb Outlet System Supplement
Off -Site System Supplement _
Wet Detention Basin Supplement
Infiltration Basin Supplement ' .
Underground Infiltration french Supplen•teut
Bioretention Cell Supplement
Level Spreader Filter Strip/Re:,to:pd Mpat::o.n Puffer S ipplement
Constrkicted Wetland Supplemmit
Grassed Swale Supplement
Sand Filter Supplement
Permeable Pavement Suppiement
Cistern Su.ppleme^it
r-
Form S W U-101 Version 09.25.08 Pap t :% n r: -

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. The complete application package should be
submitted to the appropriate DWQ Office. (Appropriate office may be found by locating project on the
interactive online map at h!W://h2o.enr.state.ne.us/su/msi maps.htm}
1. Please indicate that you have provided the following required information'by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stormwater Management Permit Application Form __
Original and one copy of the Deed Restrictions & Protective Covenants Form (if -VIA
required as per Part IV above)
Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP _
Permit application processing fee of $505 (Express: $4,000 for HD, $2,000 for LD)
payable to NCDENR
o Calculations & detailed narrative description of stormwater treatment/management
o Copy of any applicable soils report
:r'wo copies of plans and specifications (sealed, signed & dated), including:
- Development/Project name
- Engineer and firm
-Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location ntap with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control urea! rures
Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
Via. AGENT AUTHORIZATION
fr" your tv sh to cf__ iegnate authority to another individual or firm so that they may providc u,:nr t:adon on your
bcdialf (sucli as a, ;ditional information requests), please complete this section. (ex. des: ;;.t.irts; Lregineer c.-r firm'.
4�esik;��ntcu ❑�;c�::: (individual ar firm): ��/� —�, ___—---------------___-- . -- .
"Jaaiii.: : +. i•srr_ _._._-.._y� j o ��s-r P�CHT,�� sT _AIW
-it j+ - -- .h� %h�%�✓ �f7 � State:. - � :lip:_
Tlhcne: C 140 ' _t> 01 Fax: % _)_ 6 6:;v=��_> �
V1 i �. APPLICANT'S CERTIFICATION
r .',i 'r��►r,:� uj rer:on listed in Genera! lufornrntiart, it 2) e4 �/� a.
:hit -the information included on this permit application form is, to tfie best of my knowled;;e,
, .,
in conformance with the approved plan, i,.at the required deed .,r:>=� �c•.iti..:+.; _
;r',.i'.1- C(. ilVe ri:)Veliant3 ?lry Ir_ebe record d at the proposed project complies with tto lt_ia�me:Zts. f r: -_
` � .
• .. - --.�•� :arc.—__—_ ,�� `� � � �..__ Da#e:----- '�-----...._... _.--�.; _
- M : NVIJ-;0i V";rsioit 09_75.08 Pagc 4 of

. . %
i%
rr?, Ar
CENR
North Carolina Department of Environment and Natural Resources
Division�.;r !$, ater,.Quality
,"' a
Beverly Eaves Perdue COleen H. Sullins
Governor Director
May 29, 2009
Mr. Henry Heithaus, President
Murphy Oil USA, Inc.
200 Peach Street
El Dorado, AR 71731
Subject: Stormwater Permit No. SW5090501
Murphy Oil USA — Siler City
High Density Commercial Sand Filter Project
Chatham County
Dear Mr. Heithaus:
Dee Freeman
Secretary
i^
JUN 2 9 90
The Stormwater Permitting Unit received a complete Stormwater Management Permit
Application for Murphy Oil USA — Siler City -on May 1, 2009, with additional information received
on May 13, 2009 and May 28, 2009. Staff review of the plans and specifications.has determined
that the project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A
NCAC 2H.1000 and Session Law 2006-246. We are forwarding Permit No. SW5090501, dated
May 29, 2009, for the construction, operation and maintenance of the subject project and the
stormwater BMPs.. The approved design includes a sand filter that has been oversized to
provide additional treatment volume and surface area in lieu of providing an off-line bypass and
vegetated filter strip.
This permit shall be effective from the date of issuance until May 28, 2019, 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 inspection 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 thirty (30) 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, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this
permit shall be final and binding.
This project will be kept on file at the Raleigh Regional Office. If you have any questions, or
need additional information concerning this matter, please contact Robert Patterson at (919)
807-6375; or [e-mail].
Wetlands and Stormwater Branch
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] Customer Service; 1-877-62M748
Internet: www.ncwaterquality.org
An Equal Opportunity 1 Affirmative Action Employer
011C
Noi-thCarol ina
Aaturl ll'ff

Mr. Henry Heithaus
SW5090501 — Murphy Oil USA — Siler City
Mav 29, 2009
. v
Sincerely,
> . 2_��
fbi• Coleen H. Sullins
cc:. Raleigh Regional Office
Central Files
tSPU Files'
., - 0
ec: Asir. Josh Yoo', GreenbergFarrow
Page 2 of 2

State Stormwater Permit
Permit No. SW5090501
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
Murphy Oil USA, Inc.
Murphy Oil USA — Siler City
US HWY 64 (approx. 1,400' east of US HWY 421), Siler City, Chatham County
FOR THE
construction, operation and maintenance of a sand filter in compliance with the
provisions of Session Law 2006-246 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 May 28, 2019, 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 33,428 square feet of
impervious area.
3. The tract will be limited to the amount of built -upon area as indicated in Section
1.7 of this permit, and per the application documents 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 least 30 feet
landward of all.perennial and intermittent surface waters.
Page 1 of 6

State Stormwater Permit `
Permit No. SW5090501
7. The following design criteria have been provided in the sand filter and must be
maintained at design condition:
a. Drainage Area, P.cres:
Onsite, ft :
Offsite, ftZ:
b. Total Imperviou� Surfaces, ftZ:
Onsite, ft :
Offsite, ftZ:
C. Design Storm, inches:
d. Maximum Head, feet:
e. Bottom Elevation, fmsl:
f. Sand Media Depth, feet:
g.- Sed. Chamber Width, feet: z
h. Filter Chamber Surface Area, f#Z
i. Sed. Chamber Surface Area, ft
j. Permitted Treatment Volume, ft5:
k. Bypass'/ Storage Elevation, fmsi:
I. Predevelopment 1 year 24 hour:
M. Post development 1 year 24 hour:
n. Drawdown Time, hours:
o. Underdrain Diameter, inches:
P. Separation from SHWT, feet:
q. Receiving Stream/River Basin:
r. Stream Index Number:
S. Classification of Water Body:
11. SCHEDULE OF COMPLIANCE
1.2
36,076
16,184
33,428
28,618
4,810 -
1.0
2.0
540.5 (bottom of sand layer)
1.5 (above underdrains)
9 -
748
316
2,725
544.0-(weir invert)
0.3 cfs
0.3 cfs
40
6.0
2.0
Rocky River 1 Cape Fear
17-43-(8)
„C„
1. The stormwater management system shall be constructed in its entirety and
operational for its intended use immediately after the site is stable.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
3. The permittee.shall at all time 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. Mowing and re -vegetation of slopes and the filter strip.
d. Immediate repair of eroded areas.
e. Maintenance of all slopes in accordance with approved plans.
f. Debris removal and unclogging of all drainage structures, level spreader,
filter media, underdrains, catch basins and piping.
g. Access to the sand filter and outlet structure must be available at all times.
4. 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.
5. The permittee shall submit to the Division of Water Quality an annual summary
report of the maintenance and inspection records for each BMP. The report
shall summarize the inspection dates, results of the inspections, and the
maintenance work performed at each inspection.
Page 2 of 6

State Stormwater Permit
Permit No. SW5090501
6. The facilities shall be constructed as shown on the approved plans. This permit
shall become void unless the facilities are constructed in accordance with the
conditions of this permit, the approved plans and specifications, and other
supporting data.
7. 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 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.
8. 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.
9. Access. to the stormwater facilities shall be maintained via appropriate recorded
easements at all times.
10. 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,
for which 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.
11. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
12. A copy of the approved plans and specifications shall be maintained on file by
the Permittee for a minimum of ten years from the date of the completion of
construction.
13. 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 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 signed by both parties, to the
Division of Water Quality, accompanied by the supporting documentation as
listed on page 2 of the form. The approval of this request will be considered on
Page 3 of 6

State Stormwater Permit
Permit No. SW5090501
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 a request'to.transfer the permit.
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 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 re -issuance or
termination does not stay any permit condition.
8... Unless specified elsewhere, permanent seeding requirements for the stormwater
control 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 2006-
246, 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. The permittee shall submit a renewal request with all required forms and
documentation at least 180 days prior to the expiration date of this permit
Permit issued this the 29t" day of May 2009
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
for Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 4 of 6

State Stormwater Permit
Permit No. SW5090501
Murphy Oil USA — Siler City
Stormwater Permit No. SW5090501
Chatham 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 Name)
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 5 of 6

State Stormwater Permit
Permit No. SW5090501
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 outlet/bypass structure elevations are per the approved plan.
6. The outlet structure is located per the approved plans.
7. Trash rack is provided on the outlet/bypass structure.
8. All slopes are grassed with permanent vegetation, per the vegetation plan.
9. Vegetated slopes are no steeper than 3:1.
10. The overall sand filter is constructed per the approved plans.
11. The permitted amounts of surface area and/or volume have been
provided..
12. Required drawdown devices are correctly sized per the approved plans.
13. All required design depths are provided.
14. All required parts of the system are provided, such as a sediment
chamber and sand filter chamber.
15. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Raleigh Regional Office
3800 Barrett Drive
Raleigh, NC 27609
NCDENR-DWQ Central Files
1617 Mail Service Center
Raleigh, NC 27699-1617
Page 6 of 6

Greenberghrrow
MAY 0 1 7.009 7
I
Letter of Transmittal
April 28, 2009
1430 West Peachtree Street, NW
Suite 200
Atlanta, GA 30309
t: 404 601 4000
f: 404 601 3970
ATLANTA
NEW YORK
C HICAGO
LOS ANGFU5
BOS70N
DALLAS
NEW JER5EY
57, PETER5$l1RG
To NCDENR-Raleigh Regional Office Project Murphy Express-Siler City.
DIVISION Se WATER QUALITY Project# 20070551.8 g
1617 Mail Service Center
Raleigh, NC 27699 From JOSH Y00 I
919-807-6375 } 1
Attn. Robert Patterson - -
We are sending you the following enclosures via Air Express - Standard for your use:
Copies Date Description
2 4/27/09 Site Development Plans -Civil Plans
1 Application Form
1 Sand filter O&M Agreement
1 Sand filter supplement sheet
1 Supplement Documents -Storm Water Management letter, Soil report, Hydro CAD
................... .analysis for 25 years storm event
1 $505 of Review Fee
Message
Mr. Robert Patterson
As we discussed, Murphy has not closed the lot yet. However, when we are close to approval, Murphy will close the lot. Then
I will forward you the deed if you need, or any other documents for the final approval and permit.
Should you have any questions, please contact me at 404-601-4000, or e-mail me at [e-mail]
Thanks
If enclosures are not as noted, please contact sender
copies
01 Transmillal 02.0H6 PA200200705518i999 Senn2009-04-2810 NCDENR DNl- AI_elter 6bTransmittal.doc

Greenbergf arrow
Letter of Transmittal
May 28, 2009
To NCDENR-Raleigh Regional Office Project Murphy Express-Siler City
DIVISION OF WATER QUALITY project# 20070551.8
1617 Mail Service Center
Raleigh, NC 27699 From JOSH YOO
919-807-6375
Attn. Robert Patterson
We are sending you the following enclosures via Air Express - Standard for your use:
If enclosures are not as noted, please contact sender
Copies
1430 West Peachtree Street, NW
Suite 200
Atlanta, GA 30309
t: 404 601 4000
f: 404 6601 3970
An ANTA
NEW YOU
CHCAGO
LOS ANGELF.S
BOSTON
WALLAS
NEW JERSEY
57 PETERMRG
01 Tjei ,InittFl 02.05.05 P,12007,2G07C551M99 Senli2009-5-28:o NCDFlgR UWO (3rd)'letter of lransmiral.duc

GreenbergFarrauu
MA009
DENR . WA
QUAL
Letter of Transmittal
May 12, 2009
To NCDENR-Raleigh Regional Office Proiect Murphy Express-Siler City
DIVISION OF WATER QUALITY pre;ect# 20070551.8
1617 Mail Service Center
Raleigh, NC 27699 From JOSH YOO
919-807-6375
Attn. Robert Patterson
We are sending you the following enclosures via Air Express - Standard for your use:
1430 West Peachtree Street, NW
Suite 200
Atlanta, GA 30309
t: 404 601 4000
f: 404 601 3970
A7LAWa
NEW WRX
CHKAGO
LOi ANGELES
ROSTC'NJ
PALL
NP,N 1FR'Ci
ST Ff IERSRURL:
Message
Mr. Robert Patterson
,The O&M agreement signed by a Vice President or higher of Murphy is the only missing item of this submittal. I will forward it
to you once I have it.
Should you have any questions, please contact me at"404-60'1-4000, or e-mail me at [e-mail]
Thanks
1t enclosures are not as noted, 0!ease contact a n �r
Copies
01 Transmittal 02.06.06 P 17 ^ 20Ui0551 A1999 5ent,2009 05-121n KJ 'VJR DA'C {2N0)Ietler n! Transmiltal,doc

_ is � � '' �1
' M � ; w _ _
�; ��( �� � � � a � 1 �

GreenbergFarrow
Letter of Transmittal
April 28, 2009
To NCDENR-Raleigh Regional Office
DIVISION OF WATER QUALITY
1617 Mail Service Center
Raleigh, NC 27699
919-807-6375
Project Murphy Express-Siler City
Project # 20070551.8
From JOSH YOO
Attn. Robert Patterson
We are sending you the following enclosures via Air Express - Standard for your use:
Copies Date Description
1
$505 of Review Fee
1430 West Peachtree Street, NW
Suite 200
Atlanta, GA 30309
t: 404 601 4000
f: 404 601 3970
Message
�
N
two
Cn
If enclosures are not as noted, please contact sender
Copies
ATLANTA
NEW YORK
CHIC AGO
LOS ANGELES
BOSTON
WALLAS
NEW JERSEY
ST.PETERSBURG
01 Transmittal 02.06 08 PA2007 ?0070551%999 Se*2009-04-28 to NCDFNR DW41Lelter of Transmittal.doc

7/

Patterson, Robert ,�� ?
From: Patterson, Robert W,
Sent: Monday, May 04, 2009 9:26 AM
To: [e-mail]
Cc: [e-mail]'; Danny Smith
Subject: Murphy Oil Usa, Inc. - Siler City, Chatham County - Additional Information Request
Josh,
The Division of -Water Quality Central Office received a Stormwater Management Permit Application for the subject
project on May 1; 2009. A preliminary review of that information has determined that the application is not complete.
The following information is needed to continue the stormwater review:
1. On the main application form (SWU-101):
,,-Item 111.2 is incorrect, this is in the Cape Fear River Basin, please correct. .
✓-Item 111.6 must be completed - it was left blank.
1�ltem 111.8, tables must be completed. The bottom table was left blank. Also, the receiving stream, class, and
index number must be completed (see
http://h2o.enr.state.nc.us/bims/reports/reportsWB.htmi).
-One original & one copy must be provided, only the original was submitted..
v
2. The drainage area to the BMP must be delineated on the plans, or on a separate sheet no smaller.than 11"x17".
3. No pertinent calculations were provided. The only calculations provided were for the.25-yr.storm, which we do not
review. Calculations must be provided for the site and BMP design. This includes items like calculating the WQV using
'the simple method, draw down calculations showing the treatment volume discharging at a rate less than or equal to
the pre -development 1-yr, 24-hr storm (using the Rational Method), underdrain calculations, etc. All calculations must
be sealed, signed and dated.
4,,Jhe person signing the application and 0&M agreement must be a Vice President or higher for Corporations (as per
24-1003(e)(1)). Or, an original signed.letter may be provided by one of the,above mea-tinned officers providing signing
authority to Tom Bentley.
v5. There are items left blank on the sand filter supplement form that must be completed.
5 ) 2oaft V14 �+faNti ,S/S/i
Please note that this request for additional information is in response to a preliminary review. The requested
information should be received by this -Office prior to May 18, 2009; or the application will be returned as incomplete.
The return of a project will necessitate resubmittal of all required items, including the application fee.
If you need additional time to submit the information, please mail or fax your request for a time extension to the
Division at the address and fax number at the bottom of this letter. The request must indicate the date by which you
expect to submit the required information. The Division is allowed,90 days from the receipt of a completed application
to issue the permit.
The construction of any impervious surfaces, other than a construction entrance under an approved Sedimentation
Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject to enforcement action pursuant to NCGS 143-
21S.6A.
If you have any questions concerning this matter please feel free to call me at [phone].
Robert D. Patterson, PE
Environmental Engineer

NCDENR I DWQ I Stormwater Permitting
1617 Mail Service Center, Raleigh, NC 27699-1617 (Mailing)
512 N. Salisbury St, Raleigh, NC 27604 (Location & Parcels)
[phone] Phone [phone] Fax
Email: robert.patter son cr ncdenr.gov (NOTE NEW EMAIL ADDRESS)
Website: http:f/h2o.enr.,state.nc.us/su/stormwater.htm]
*Please consider the environment before deciding to print this email*
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties.
2

Application Completeness Review
First Submittal ❑ Re -submittal Date Received: s r Date Reviewed: s `f Di By 1�.�
Development/Project Name: Mc.� X YIsRtfte, — Syr-r_-tQ. c
Receiving stream name gafi.ny {t. 10"' S� +' . classification: C_
For post -construction requirements, a program will be deemed compliant for the areas where it is
implementing any of the following programs: WS-I, WS-II, WS-I11, WS-IV, HQW, ORW, Neuse River Basin
NSW, Tar -Pamlico River Basin NSW, and the Randleman Lake Water Supply Watershed Nutrient
Management Strategy.
Projects that require a 401/404 within an NSW require 85% TSS, 30% TN and 30% TP removal.
T&E Species (Goose Creek, Waxhaw Creek or Six Mile Creek Water Sheds): Nf�i
Latitude and Longitude: ieE_* t `o`t "Al W .2-S ' 33'w Jurisdiction ST*9-'>•�
Project Address: L4 S. . hilN__ _b Sr 4n-w— STY __
Engineer name and firm: 2dv_✓ ,
❑ Low Density (no curb and gutter) ❑ Low Density with curb and gutter outlets [� High Density ❑ Other
❑ 401/404 im acts__tg9 surface waters, wetlands, and buffers (add language to cover letter and/or addinfo letter)
ar BUA 6 �- 1-t'7. . .
V Check for $505.00 included
a,- Original signature (not photocopy) on application
OLegal signature (Corporation-VP/higher, Partnership -General Partner/higher, LLC-member/manager, Agent).
L Check spelling, capitalization, punctuation: http://www.secretary.state.nc.us/corporations/thepage.aspx
If an agent signs the application, a signed letter of authorization from the applicant must be provided
which includes the name, title, mailing address and phone number of the person signing the letter.
❑ For subdivided projects, a signed and notarized deed restriction statement
©Sealed, signed & dated calculations
a- Correct supplement and O&M provided for each BMP on site (check all that were provided & number of each)
❑ Bioretention
❑ Dry Detention Basin
❑ Filter Strip
❑ Grass Swale
❑ Infiltration Basin
❑ Infiltration Trench
❑ Level Spreader
❑ Permeable Pavement
❑ Restored Riparian Buffer
❑ Rooftop Runoff Management
2- and Filter
❑ Stormwater Wetland
❑ Wet Detention Basin
❑ Low Density
❑ Curb Outlet
❑ Off -Site
­0 NCDOT Linear Road
Le' Two sets of sealed, signed & dated layout & finish grading plans with appropriate details
s�- Narrative Description of stormwater management provided
El- Soils report provided
ur� Wetlands delineated or a note on the plans that'none exist on site and/or adjacent property
d Details for the roads, parking area, cul-de-sac radii, sidewalk widths, curb and gutter;
mr'� Dimensions & slopes provided �
® Drainage areas delineated O Pervious and impervious reported for each ❑ Areas of high density
Ell' Inspection and maintenance agree ents provided
ElApplication complete Ipplication Incomplete Returned: (Date)
Comments M(457 6"P1,97rif ZT. S/ -m it L Ylv. ,
/S 1A/609A)&c Y. ! mteG. 4 /copy OF sWu -10! 1 ! -
%7 r JV-, .6 : 121 W_x P'0-41
l C-i-P
1
May 14, 2008 Revision

SL 2006-246 Section 9 Post Construction Requirements for Non -Coastal Counties
Low -density projects
❑ No more than two dwelling units per acre or 24% built -upon area;
❑ Vegetated conveyances to the maximum extent practicable;
❑ Built -upon areas at least 30 feet landward of perennial and intermittent surface waters;
❑ Deed restrictions, protective covenants, and/or other restrictive language/measures.
High density projects
❑ Control and treat runoff from the first one -inch of rain.
❑ Runoff volume drawdown time must be a minimum of 48 hours, but not more than 120 hours;
❑ Discharge the storage'volume at a rate equal to or less than the predevelopment discharge rate for the
one-year,• 24=hour storm.'
❑ Achieve 85% average annual removal of total suspended'solids`
❑ For BMPs that require a separation'from the seasonal high-water table (SHWT);'the separation shall include
at least 12 inches of naturally occurring soil above the SHWT.
❑ Stormwater management measures must comply with the General Engineering Design Criteria For All
Projects requirements listed in 15A NCAC 2H .1008(c);
❑ All built -upon areas are at least 30 feet landward of perennial and intermittent surface waters; '
❑ Deed restrictions, protective covenants, and/or other restrictive language/measures
❑ Provide a mechanism to require long-term operation and maintenance of Best Management Practices
Post -Construction Runoff Controls for T&E Species
Goose Creek, Six Mile Creek and Waxhaw Creek Watersheds
Buffers
❑ 200' undisturbed buffers on perennial streams
❑ 100' undisturbed buffers on intermittent streams
Low -density projects
❑ All built upon area shall be limited to 10 percent.
❑ Use of vegetated conveyances to the maximum'extent practicable;
❑ Deed restrictions, protective covenants, and/or other restrictive language/measures
High -density projects
❑ The stormwater control measures must control and treat the difference between the pre -development and
post -development conditionsforthe 1-year-24-hour-storm. ------- --- - -
❑ Runoff volume drawdown time must be a minimum of 48 hours, but not more than 120 hours;
❑ All structural Stormwater treatment systems must be designed to achieve 85% average annual removal of
total suspended solids;
❑ Stormwater management measures must comply with the General Engineering Design Criteria For All
Projects requirements listed in 15A NCAC 2H .1008(c)
❑ Deed restrictions, protective covenants, and/or other restrictive languagelmeasures.
❑ Provide a mechanism to require long-term operation and maintenance of Best Management Practices
High Density Projects that require a 401/404 within an NSW
❑ 85% T5S t
❑ 30% TN
o
May 14, 2008 Revision