NCG140387_COMPLETE FILE - HISTORICAL_20190314

STORMWATER DIVISION CODING SHEET
i L- - NCG PERMITS
PERMIT NO. /v��
DOC TYPE 5( HISTORICAL FILE
❑ MONITORING REPORTS
DOC DATE ❑ -Doi 'I u 3 I y
YYYYMNVDD

C/L-
O
SURFACE ELEV. @ 46.5'
C/L-
O
C/L-
N
C/L
RECLAIM MACHINE
FLOOR ELEV. @ 46.5' \
TOP OF WALL
@ 46.5'
R F(-Yrl F
EOC @ 46.5'
RECYCLE STONE BIN
5URFACF ELEV. @ 46.5'
46.5' 6.5' f 46.5`
EOC
-4
EOC
EOC
12'
4'
12'
12'
2
0�
0
1
z
Fr)
0
0
>
¢�
oC
z
LU
p
w
1.-/ U
Lu
`/_ U
0
D �
D �
52.0'
f
SLURRY
RECLAIM OUTLET
MACHINE
4' WEIR WALL @ 44.5'
BOTTOM ELEV. @ 40.5'
N
BOTTOM ELEV. @ 40.5'
A .2-
C/L
D15CHARGE PIPE C/L-
TO RECLAIM
MACHINE _
N
C/L
4' WEIR WALL @ 44.5'
BOTTOM ELEV. (P 40.5'
0
6'
WEIR W,, 1.1 @ 44.5'
D € -. )TTOM ELEV. @ 40.5'
PUMP
iAMBER
TOP OF WALL @ 46.5'
4'
ry
O NOTE: "EOC" = EDGE OF
CONCRETE
z
0
z
z
uJ
0
WOODEN 5TEP5 (YP.)
15'
1 ,
I
I Al
�T
LU
I
I
:2 p 1 10.5' START RAMP (T)T.) -�
4 RAMP DOWN t
1
O I
21 ca ` EDGE OF CONCRETE
-- I
--
I
I
I •10.5'
0 RAMP DOWN
I
I
O 4' WEER WALL @ 44.5' 1
O +/FI0.5 RAMP DOWN
O� 1
C B �C
G' OVERFLOW WEIR WALL @ 45.5' 74'
TOP OF WEIR
WALL @ 44.5'
TOP OF WALL @ 4 .5'
SECTION B-B
NT5
i0.5
Il = RAMP DOWN
I
I
4 WEIR WALL @ 44.5'
1 40.5'
--aRAMP DOWN
1
I
PLAN VIEW
SCALE: I " = I G'
SECTION A -A
NT5
TOP Of WALL @ 46.5'
TOP OF WEIR WALL @ 44.5'
31'
TOP OF WALL @ 46.5'
TOP OF WALL @ 46.5'
-APRON FLAT @ ELEV.=46.5'
A
TOP OF WALL @ 46.5'
~TOP Of WALL @ 46.5'
1
TOP OF WALL @ 46.5'
APRON @ 46.5'
rtlo �c hA/A 1 1 � 46.5'
'OP OF OVERFLOW WEIR
VALL @ 45.5'
SECTION C-C
WASH DOWN / RECLAIM FACILITY DETAI L5
NOTE: 5EE 5EPARATE DOCUMENT FOR 5TRUCTURAL DETAILS,
NT5
6" MIN,
i1I l I �CDMPACTED 5U66RAb>
ROADWAY/PARKING SURFACE DETAIL
NT5
0 x I'-0' x .080 5TD ALUM. SIGN
TD READ'VAN ACCE551BLf='. BOLT
TO WI). P05T Wrrh 318' CANDIUM
PLATED NUTS, BOLTS t WA5HER5
I'-G' x 1'-0' x .080 5TD. ALUM,
HANDICAPPED PARKING SIGN TO
READ'RE5EKVED PARKING'WITH
IDENTIFICATION SYMBOL. BOLT
TO Wiz. P05T WI 318' CANDIUM
PLATED NUT5, BOLTS AND WA5HER5-
9' x V-O' x .080 5TO ALUM. SIGN
TO READ 'MAXIMUM PENALTY $250,-
GS 20-37.0. BOLT TO WD. P05T
WITH 3.8' CANDIUM PLATED NUTS,
BOLT5 AND WA5ht'.R5.
TREATED WOOD 4'x4' POST.
RESERVED
PARE®ING
� fib
N F.
MAYIMUM
1 E
re"auY
$25U
12' _ =1
SIGN R7-8E
TH15 SIGN MAY BE
USED IN PLACE OF
51GN5 R7-81 R7-81)
I ' TS[RVED
!l ^AMNG
�I �I
� II
SIi:p1 R7-8
VAN ACCE551BLE
N 51GN (AS REQUIRED)
6 0 L J L J - N
o a R7_g O O
O1= D R7-BE O 0 0
U U
K7-bD
EINI5HED
GRADE in n
51GN MOUNTING HEIGi1T5
O�NT5
CONDITION I'
11 PASS UNDER OR ROUNDSIGN
:
CONDITION 2: PEDE5TRIAL PATH GOE5 BY,
I I UNDER OR AROUND SIGN:
-112"R('rYP} I-112'R(TW}
MAIfIMUM VAN
ru um iu
y25o 318"ITYP) AUCESsiStP 318'rTYP)
SIGN K7-8D VAN ACCE550L: SIGN
5TANDARD COLORS (ALL SIGNS):
BACXGROUND - WNME
LETTERING / BORDER - GREEN
ARROW - GREEN
FIGURE - WHITE ON BLUE BACKGROUND
CORNER RADIUS - 1 1/2' (ALL SIGNS):
TYPICAL HANDICAP SIGN DETAIL
NTS
5TONE SUI uNi q- rlivui iv><
- -CAP - STEAMER HOSE CONNECTION
- G" 5CH 40 PVC 90 BEND
24"
G" 5CH 40 PVC RI5ER PIPE
GROUND- -
HEAD A5gEMBLY DETAIL
5TRAINf-F' -P1FT� it
NT`3
6" PVC STRAINER WITH BUILT IN CHECK VALVE BACK FLU5H
END CAP. INTAKE RATIO 5HALL EQUAL OR EXCEED 4: 1. HOLE
PATTERN SHALL BE SUCH TO PROVIDE 100%4 PULL DOWN TO
LINE Of HOLE5 WITH NO CAVITATION @ 1,000 GPM.
ELEV. = 36.5'
50
N O
i 5EE "HEAD A55EMBLY DETAIL."
45
GARCo MIN. COVER = 24"'
�O
`SFp PERMANENT POOL
Q4 1.0'
_ I
40
w -0 -
G,5 -
900 BEND -f C/y 40 pVC 5EE "STRAINER DETAIL."
1 1 1/40 EEND
- 36.5'
35
BOTTOM @
Q I 1 1 1 /4- BEND 34.0
++
2„ STON = SUPPORT ANCHOR
I
30 1 1 1'1 1'
1211 0 10 20 30 40 50 60
DISTANCE _F'OM EDGE OF GRAVEL= DRIVE (FT.)
SECTION
PIPING PROFILE
CONCRETE WHEEL STOP DETAIL
NT5
5CALE: 1-10RIZONTAL: I " = 1 0'
VERTICAL: 1 " = 5'
DRY HYDRANT DETAILS
� h � .1 / a �� e"p wt //
Ccr3struct c,l in accordance with these documents is
required by the stormwatel c+z-,oiit. North Carolina
rules require that the storywater system designer
inspect during constru, tsion, certify conformity with the
parts and specs; and ce;i,`v re=^pliance with the
stormwater rules.
Date
by �-� !�C omsion of ater Quality
Shoot #._ sww4alew Date�01Z�41i
[vap, ee
FINAL DRAWING
NOT I55U ED FOR
CONSTRUCTION
i

GENERAL 51TE PLAN DATA. -
PROJECT NAME:
BENTON READY -MIX OF BRUNSWICK, INC.
PROJECT PARCEL NUMBER:
18200092
PROJECT ADDRESS:
197 BARNHILL ROAD NW
5HALLOTTE, NC 28459
PARCEL ACREAGE:
5.47
PROPOSED IMPERVIOUS SURFACES:
BUILDINGS:
5,170 5.F.
RECYCLED A5PHALT/5A5E
132,G23 5.F.
OTHER:
1 1,532 5.F.
TOTAL PROPOSED IMPERVIOUS SURFACE:
149,325 S.F. (3.43 AG)
IMPERVIOUS COVERAGE RATIO:
0.4049 (40.5%)
EXISTING STRUCTURES (TO BE REMOVED):
895 51'
CURRENT ZONING OF PROFERIY:
IG (INDUSTRIAL GENERAL)
FLOOD ZONE DESIGNATION:
NONE
EX15TfNG LAND USE:
VACANT
INTENDED USE:
IG - CONCRETE BATCH PLANT
SETBACKS:
50' FRONT AND REAR
10' 51DE5
ON 51TE WETLANDS ACREAGE:
0.3G
GENERAL NOTES
1. Sewer Service will be by a private on -Site septic tank 5y5tem permitted by the
Brunswick County Health Department.
2. Water service will be a private well permitted by the brun5WICk County Health
PARKING SPACE DATA TABLE
PARKING 5PACE5 REQUIRED PARKING 5PACE5 PROVIDED
STANDARD SPACES 4 22
HANDICAP ACCES51BLE I I
TOTAL3�k Yf rstc y LSE{4c�
CONCRETE TRUCK PARKING SPACES: ! G
STANDARD PARKING 5PACE CALCULATION:
PER 1 .000 5F ENCL05ED FLOOR AREA: 4,570 5F / 1,000 = 5
HANDICAPPED PARKING SPACE CALCULATION:
1-25 TOTAL 5PACE5 IN LOT REQUIRE5 I ACCE551BLE 5PACE
404 WETLANDS 0.36 AC
Course
Bearing
D15tance
L I
N 44054'34" If
189.97'
L2
N G9042158" E
G9.72'
L3
N 57040' 14" E
45.52'
L4
N 38055138" E
42.44'
L5
N 50040102" E
53.00'
LG
N 45034' i 0" E
48.04'
L7
N 70" 13'4G" If
3G.48'
L8
N 47037'02" E
5G.70'
L9
N 25°4230 E
42.45'
L 10
N 2 103912 1" W
22.50'
L I I
N 08°23' 1 2" W
30.95'
L 12
5 44°54'34" W
1 410.87'
PARCEL #: 18200085
OWNER: BRUNSWICK TIMBER LLC
ADDRESS, SUITE I250
15 PIEDMONT CENTER
ATLANTA, GA 30305
ZONING: CO -RR
USE. VACANT
38.5' 40.0' 47.1'
ni
- - - -
- - - -
-
♦
/
/
10
Department.
p0' ♦/
3. All Utilities will be under ground. Developer will coordinate electric line
♦ `SS
placement with BEMC and telephone/cable line placements with AMTC.
S
4. Erosion control during construction will be in compliance with the State of
North Carolina regulations.
♦♦ 7
5.5tormwater treatment will be in compliance with the Brunswick County and
i♦P
State of North Carolina regulations.
//� ,I, O
G. No sign currently proposed. 51gn to be proposed at a future time as desired.
°J� �♦ 1''
O� Uj� ♦ `
7. All external lighting shall be in accordance with approved lighting plan.
♦ I.. L,
♦ v
8. Telephone * electric plans shall be developed and Implemented by ATMC
/
BEMC prior to and during construction in accordance with approved 5tandard5.
♦♦
9. The Contractor is re5pon5ible for locating existing underground Ut111tie5 prior
to beginning work whether or not said utI[ItI65 are Shown on tl- - plans. Locations
shown on the plans Should be considered approximate and field verification should
/♦ 1
PROPOSED PROCESS
be performed. Any damage to existing utilities or project feat,ires Shall be
/
f� WATER WELL
corrected by the Contractor at his expense.
♦♦ : I . 1..
`
10. Should the Contractor determine that existing conditions or other factors
\V ♦ ���
t ♦♦ `� �.i
`o
present or may present a conflict to performing the work set (ut on the plans
♦ ��
andlor other construction documents, he shall immediately contact the Engineer
♦ 0�
for direction.
1 . The Contractor shall not perform any work on any properties outside the
♦ `I' �
boundaries of th15 project except a5 may be allowed by propel'i-y owners in
04 R 23'
writing.
Rx�` ♦♦
p v AGGREGATE HOPPER
/ ) O, Z
30.0
♦
a00SAND GArEi
♦ NS
RECLAIM 4 WA5HDOWN R 20' R 44
AREA
� o
♦
♦
♦
----------------------- 50' FRONT SETBACK
235.2'
I� HELICOPTER PAD - S
U 61
in in I
30.0' I N 89°34'09'W T 572.28'
PARCEL #:
1820008501
OWNER:
ODELL WILLlAM50N
PARCEL #:
182000920E
ADDRE55:
2 CAUSEWAY
OWNER:
50UTHPORT CONCRETE CORPORATION
OCEAN ISLE BEACH, NC 284G9
ADDRE55:
3710 SKY VIEW LANE 5E
ZONING:
5H-HB
SOUTHPORT, NC 264G 1
USE:
COMMERCIAL (UNDER CONSTRUCTION)
ZONING:
CO-IG
USE:
COMMERCIAL (UNDER CONSTRUCTION)
TH15 DRAWING 15 THE PROPERTY OF COMPA55 POINTE ENGINEERING, PA
AND 15 NOT TO BE REPRODUCED IN WHOLE OR IN PART WITHOUT WRITTEN
PERM15510N FROM COMPASS POINTE ENGINEERING, PA.
O 20
ra
(V
�%,
5 89043A E 147.76'
PROPOSED
ABLE WATER
WELL
EXI TING WELL TO
Bff A15MOONED
M I IIER
PROP05ED qROCE35
WATER WALL
R 18'
RE C✓LO o
A5PHi LTIASE
(51-IAD D AFi A)
162.0
G4.0'
N 88°06'
EXISTING
SEPTIC TANK
w 4-
ca
501 R AR BACK AND BUFFER
R'l5' 1 R30'
o
N
moo- ADDITIVE
M�'1! PROCESS HOU5E
WATER TANKS 20'
R 20' HOUSE g
40, -LYA5H 51LO 40'
41P- I CONVEYOR
CONCRETE BATCH PLANT
5able: I' = 40'
OFFICE
PARKING
c
n,
CONTROU t
)PERATOR
BUILDING
'7:35'
`10
CEMENT
SILO
R 35'
CONCRETE WHEEL STOP
SEE DETAIL)
9.5' x 20' PARKING
SPACE (TYP.)
RECYCLED
A51PHALTIbA5E
(5HADEC AREA)
DRY FRE HYDRANTS
(SEE DeTAIL5.)
EXISTING DRIVE
(TO ISE RELOCATED)
9G.0'
188.44`
1 1 I EXISTING SHED
50' BUFFER 0TO BE REMOVED
m
O
co
EXISTING OBILE HOME
TO 15E RE OVED } APPROXIMATE LOCATION O=
l EXISTING NITRIFICATION FIE''-D
1
86.4' 1
4 N
1
- TE PORARY OFFICt
4 PROP05ED HANDICAP
-- - PARKING SIGN
(TYP.-SEE DETAIL.)
915 }
1
FUTURE }
OFFICE l
1
w
}
FUTURE
MAINTENANCE 74.1'
1
50' l
0
3�0
50'
I
I
8Uf'f�l=R
1
132.7'
1
!
f
1 1 O. f
172.0
f
I
1
'ZOM PROPER
CEMENT WEI
LIN
TO CENTER OF!
DISTANCE TO
H H
/L
PPER (MIN. f
I
ROM WEIGH
HOP PE
. 1S
164')
C\
f
U1
mj
of
I
o
O
_o f
to
on
nl
U4
OI
�
f
i
1
in
CIS
f1
PROPOSED 10' x 10'
SCREENED DUMP5TER PAD
STRUCTURE HEIGHT5
STRUCTURE I.D.
HEIGHT
PROCE55 WATER STORAGE TANKS HOUSE
22'
ADDITIVE CONTROL BUILDING
10,
FLYA5H SILO
GO'
CEMENT SILO
55'
CONTROL / OPERATOR BUILDING
22'
OFFICE / MAINTENANCE~ BUILDING
20'
PARCEL #:
18200091
OWNER:
VIOLA H. hEWF'
ADDRESS:
2 12 5HIfRRILL `_ I R.EET
MATCH
LINE
OAKI5LAND, Nc 2.84G5
ZONING:
CO -RR
USE:
VACANT
l
} 1
�
i.
o
m
4 �
INV 121N 80X
37.G4
INV 121N GMP
GO
1 �1-21 E B
X
�'37.95
- : .88
R151ER
41.1 I`; 11
j
J
TOP BOX y J ��
42.03 / i
f INV 121N CMP
t - 38,01
1
�0
17 101 BUFFER AND 51DE SETBACK
-
PARCEL #:
15200091
a
OWNER:
VIOLA H. `1fV,ffTT
ADDRE55:
212 5HERZILL 5TRET
OAK I5LAr D, ;A'G 26465
in
m
ZONING:
CO-IG
cr}
USE:
RESIDENTIAL
O
to
EXISTING DIRT DRIVEWAY
1
APPROX. I O' WIDE
l+
i~- - NEARE5T FIRE
24' - - HYDRANT > 1,500 FT
MATCH LINE
ALONGit
U5 H WY 17S
EXl it TINv�
CO VET
f
EX15TING GO' ACCESS
! AND UTILITY EASEMENT
MC 34-257
FINAL DRAWING
NOT ISSUED FOR
CON5TRUCTION
I,C7 COPYRIGHT 2006
ALL RIGHT5 RE5ERVED

5TORMWATER NARRATIVE
The proposed Benton Ready -Mix of Brunswick, Inc. facility will be located within the planning Jurisdiction of
Brunswick County on tax parcel number 18200092, The site 1s Just northeast of the Town of 5hallotte,
approximately 1 /3 miles north of U5 17. The address 15 157 Barnhill Road, NW. The tract area is 8.55 acres,
approximately 0.3G acres of which are wetlands. No wetlands are proposed to be disturbed during the
construction of this project.
Approximately 39.9% of the site will be covered by "built -upon area" (BUA). The large portion of the BUA will be
recycled asphalt or base material for the movement and parking of concrete mixer trucks. A smaller portion of the
BUA will consist of an office/maintenance budding, control house, well tank house, plant hopper/loadmgiconveyor
system, a mixer fueling area, a helicopter pad, and miscellaneous concrete surfaces associated with the mixer
washdown and concrete reclaim area. 5tormwater runoff from all of the BOA will be collected and directed to a
wet detention pond for treatment with the exception of a small portion of the entrance drive and the helicopter
pad (30' x 30'). The helicopter pad will be surrounded by grass surfaces graded to provide overland flow.
5tormwater collection will be by yard inlets, catch basin, storm drainage piping, and vegetated 5WACS.
The 5tormwater pond is designed to treat the runoff from the first I V2" of rainfall and to remove 90% of
suspended solids in accordance with State regulations. The orifice in the pond outlet structure is sized to draw
down the "treatment volume" in approximately 2 VP days. In addition, the pond is designed to be in compliance with
the Brunswick County 5tormwater ordinance.
In addition to the State 5tormwater permit, application shall also be made for an NPD55 Dr5charge Permit for
Ready -Mix Concrete 51te5. Process wastewater will result from washdown of the surface of the mixer trucks
before they leave the site to deliver concrete and from the dumping of excess concrete from mixer trucks when
they return from delweries. A reclaim/settling facility will be used to treat the process wastewater. A large
portion of the water used in this operation will be recycled; however, there will be some overflow into a vegetated
swale that is part of the 5tormwater collection system that directs runoff to the wet detention pond. The
overflow is at the end of the settling basin where a large percent of the solids have been settled out. The settling
facility will be routinely cleaned out by front-end loaders which access the compartments of the Settling basin by
ramps.
Further, application will be made to the NC Division of Air Quality for the required air duality permit for this project.
This project drains to a tributary of Williams Branch within the Lumber River Basin. Williams Branch is classified as
C; 5w, HQW and has the stream index # 1 5-25-2-9-3.
5TORMWATER FACILITIE5 MAINTENANCE
i . After every significant runoff producing event and at least monthly;
• Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulatlons, vegetated
cover, and general condition,
• Check and clear the orifice of any obstructions such that drawdown of the te-aporary pool occurs within 2 to 5
days. Replace orifice nipples that become damaged.
2. Repair eroded areas Immediately. Re -seed as necessary to maintain good � getative cover. Mow vegetative
cover to maintain a maximum height of six inches. Remove trash as needed.
3. Inspect and repair the collection system (i.e. yard Inlets, storm drains, etc.) quarterly to maintain proper
functioning.
4. Remove accumulated sediment from the wet detention basin main pond and forebay Immediately after completion
of construction and after all denuded areas have been stabilized with a vigorous vegetative cover. Thereafter,
remove accumulated sediment in each part of the pond semi-annually or when water depth is reduced to 4 feet in
the forebay andlor the main pond. Removed sedlment shall be dtsposed of in an appropriate manner and shall be
handled in a manner that will not adversely impact water quality (i.e. do not stockplle near the wet detention basin,
a stream, or any other water body).
51 Remove cattails and other indigenous wetland plants from the wet detention pond when they cover 50% of the
basin 5urfa _�-4-
SWALE DATA TABLE
Depth of
Flow Ft
Velocity
(FPS - - -
E.D.
Shape
Bank Slope
Temporary Cover During
Permanent
Design
During
During
Construction
Cover
Slope {%)
Construction
Permanent (@
Construction
Permanent
f@ Q21
Q10)
1`9 tat)
Q 010)
A1A
Triangular
3.1 (H V1 or
.lute Net
grass
0 91
0-7
1 1
2 9
1-4
Flatter
A.1B
Triangular
3,1 (H V) or
(special liner not required
grass
0.38
1.1
12
2 0
0,7
Flatter
apply seed4oitilizertnullch'}
A2A
Triangular
3 1 (H V) or
r
I (special liner not required -
';
grass
0.53
0 7
1 1
I 2.0
0.5
Flatter
apply see-&fartilizerlrnurch)
E
A2B
Triangular
`:. 3:1 (H -V) or
Jute Net
grass
1.45
0-5
_
109
2.9
f 1-2
i Flatter
B1
Triangular
; 3.1 (M:V) or
Fiberglass Roving
grass
0.91
09
14
2.2
1 9
Flatter
132A
Triangular
3:1 (H:V) ar
? Jute Net
grass
091
06
1.1
2.9
{ 1.2
Flatter
B28
Triangular
3 1 (H V) or
Double Fiberglass Rmmng
grass
3.33
04
06
r
2.7
12
Flatter
IV
,NGTE: E: Marc jute net is called out, f argiasa or double fiberglass roving may he used. 'Where fibergiass roving is called out. double fbeiglass roving may be used-
N 8800035 f 85.44'
5 82043'44"1= 147,70 _
/4--52 53
52
r
0 1i
1 \
J
Cl r 1
r I
t `
_\
\
1
�
I
�
\
1
\
I
\
I
0
d 1 J
! lit
LEGEND
WET LANDS
PROP05ED GRADE
49
EXISTING GRADE
- - -- -49- - - -
5W POND DA BOUNDARY
NOTED
� SD-B2
STORM DRAIN WITH ID
J13-A5
JUNCTION BOX WITH iD NOTEp
YARD INLET WITH ID NOTED
Y1-5 I
CATCH BASIN WITH ID NOTED
C13-A3
PROPOSED 51"OT ELEVATION
48.5
i
INLET and JUNCTION BOX DATA TABLE
Rim
Invert Elevation ft.
I. D.
Type
Elevation
In
In
Out
YI-Al
Yard Inlet
440
38.0
40.0
38.0
YI-A2
Yard Inlet
45.5
41.0
; (nla)
41.0
CB-A3
Catch Basin
46.0
41-8
(nla)
41.8
YI-A4
Yard Inlet
45.2
(nla)
(nfa)
....
422 ....
JB-AS
Junction Box
49.6
46.8
(inla) -
--46.8-
YI A.6
Yard Inlet
48-8
nla
nla
47.0
YI-B1
Yard Inlet
43.2
39.3
(nfa)
I .
39.3
YI-B2
Yard Inlet
43.2 1
40.0
1
Infa)
40.0
I YI-B3
Yard Inlet
43.5 �
n/a
l )
i
nla
�� ...) _
40.5
JB-Cl
JLlnction Box
43.0
38-5
(nla)
38.5
STORM DRAIN DATA TABLE
� RIM 48.5 I � \ _ _ J � � 1 -
\\ \ \ N, I 11 \\ ' // / .s 1 r I. D. Type Diameter Length jft,) Invert Elevation h.
li 1 ty� �D-AG y \\ / ,� _ r i 1 i (in.) In Out
SD -Al FRCP 36 32 38.0 37.5
SD-A-2 RCP is 64 41 0 _ 40.0..
JE�-A�/ - / i SD-A3 RCP 18 112 418 41.0
rr -. 1 __ _
G. Use a mp to draw down the basin in an emergency or as needed for maintenance. The discharge of the pump, 4 / ' '
�, / I SD �4 RCP 5 64 42 2 41.8
50 y'
should be directed into a sum to settle out sediment prior to overflown intr• 0 natural drain e feature. Z/l.+y�0 9 ' / j / , j
P P g 9 ! / s � � -. / /� ;� � / / Si] -AS RCP 12 72 46_$ 46.fi
7. Perform other maintenance activities as may be required to keep the wet detention and and collections stem _ \ / - /
y d l' p y 44 - ' , </ _ ��� r-_ ' �/ /�' SD A6 RCP 12 40 47.0 46.8 _.._.
in good working order. SWALE AiB - / f
T
5WALE A2A / / I // t \ - _, 1 , } OD-B 1 R•✓P 30 288 39.3 - 38.0
5WALE 13213 SD-B2 RCP 18 56 40.0 39.5
(STEEPER SLOPE)13n,
SD B3 RCP 15 so40.5 40.0
// / Z. RiM P, 45.2 / �-
f 49 / ,' i 11Ii SD-101 CAAP 16 160 38.3 37 6
�1' '> /�/ , lilll _SD-C2 CAAP 18 162 39.0 I 38.5
,AAP = CORRUGATED MATCH LINE
�/�\ 4LUMINUM A
D-A4 } ---�' /�� / -Nit�i �, / /, III EXISTING ALIGNMENT/ r I NEW ALIGNMENT
48
/4g / RIM 6.0 \ \ Ty�ir'IcE- i l �1// ' /// _ I t1 1 cJD-C I
I I
// 46.5 REALIGN EXISTING ACCE55 K)AD. REMOVE 1t
GRAVEL FROM PORTION OF FYISTING ROAD
ik� w l�l BEING ABANDONED AND PLACE RECYCLED
ASPHALT/13A5E ON NEW ROAD ALIGNMENT. r �'
INV 121N Box
7.64
5D-A3 Gv rGl fl+ri i
/ / / c--` �\ iil0 I INV 1 21N CMP -I-21 X Ifll+1�14 4G.3 ��` \� '� i+ 1��'37.9
4G 5 46.5 ` �� \ // // / l \ {{f a RtSiER �Ii jll
r �� J/ ii)lllflttlr 4
4G.5 4G.3 , � 41.1 1
�
/ / \ TOP BOX /
RiM 45.5 / ( \ Ul /
/ / I SWALE B2A \ 42.03 1 ! I! I i
Y1-A2 - r INV 2iN CIA I I l I
€ 5D-A2 + r , 1` L u
z 4G �� I ((MILDER SLOPE) . III t- 38.�11 _ Ill �, I_
! A EAIAr' /
4G.5 1 46.2 SW L / \`yl I II i Q )I I I J
46.5 Y AI Z/' 5D-B� /� SWALE BI 1 fl In i�
/' YI-B i 1 I j 0 1 / i 0
t j l /, b`
�6 / { r / YI-B3 �r { I Lin \ / I ! n
.� r/ / 45 � y I ^. l RIM 43.2 `t 4 I N I // I I ! I I O V
45 RIM @ A4::0
_.4.7 -� 4
4 3 4 \ 5D-52--- RiM 43.5 III �, Q
- { SD-63 I ill N 11 f i I I l/ r
48.5 , \ SiNALE A l 13.. 2.2 11
0.5
-2 i�0 _ -� I► �/�/ A,SDAI
RI 43. 34 I 411` EXl TIN��
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5D-C2 , g ., \. AA 1 cm I li1
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G+- � � EX15TfNG
_ \. ! I u� 1
GO'EACOVER 43.5' 1 MC 345257NT
/ L_
TH15 DRAWING 15 THE PROPERTY Of COMPA55 POiNTE ENGINEERING, PA
AND 15 NOT TO 13E REPRODUCED IN WHOLE OR IN PART WITHOUT WRITTEN
PERM1551ON FROM COMPA55 POINT= ENGINEERING, PA.
(C) COPYRIGHT 2005
ALL RIGHTS RE5ERVED
.Pi
' 1 POND OUTLET l I I ti JB-C 1
1 RI5ER PIPE 1 Il I Ill
rl I STORMWATEk WET DETENTION POND REALIGN EXISTING ACCE55 ROAD. R'_MOVE
,r f'r I GRAVEL FROM PORTION OF EX15TIN6 ROAD
(SEE DETAILS) EXISTINGALiGNMENT 1 1 Ili Il tl 40
41 t A5P ALI BEING T/BA5OON NEW ROAD ALIGf` RENT.
�:. u: r 42; 5D-C I
n 20 40 60 1 GO
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5nla: I' - 40
s�
9-
M ATC L+NE
I J�n
�'rZncP�
5CALE: I' = 40
DRAWN BY: TMM
CHECKED BY: DMC
155uED DATE: 911 1106
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Appromea t�ifi�.tpi4✓t96 �3AM012414111ants
Construction in accordance with these documents is
North Carolina
�\Q0 CARO
required by the stormwater permit.
rules require that the stormwater system designer
O S
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Inspect during construction; certify conformity with the
f
plans and specs; and certify compliance with the
storltnwater rules.
Date 2 i6 0
-
499 a
Permit # 123,9Z
by NC Division of ate Qua ity
OJ ��
Sheet # Revision Data�4t
( `
FI N AL D fzAWI N G5
NOT 155U ED FOR
C-3
CON5TRUCTION
PROJECT # 050508

4G.5' 4G.5' f 4G.5'
EOC
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RECLAIM MACHINE
WOODEN STEPS MT P.)
FLOOR ELEV. @ 4G.5I
TOP Of WALL
52.0'
15
@ 4G.5'
.//
C/L
,
SLURRY
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4'
-
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RECYCLE
RECLAIM
OUTLET
I
-
-
SAND BIN
MACHINE
LU I
SURFACE ELEV. @ 46.5'
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p 1 40.5'
START RAMP (Tl'P.) 1
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EOG.-'@ 4G.5'
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RAMP DOWN
`�
RECYCLE STONE BIN
SURFACE ELEV. 4G.5`
21 m
EDGE OF CONCRETE
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TO RECLAIM
MACHINE
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4' WEIR WALL @ 4�_4 .5' I TOP Of WALL @ 46.5'
40.5'
�-- RAMP DOWN
�- BOTTOM ELEV. @ 40.5' -1141
I
�� 4' WEIR WALL @ 44.5' `TOP OF WALL @ 46.5'
II/40.5'
BOTTOM ELEV. @ 40.5' RAMP DOWN - APRON FLAT @ ELEV.=4G.5'
A 2' I A
I
4' WEIR WALL @ 44.5' I
�/ I 40.5' I TOP OF WALL @ 4G.5'
BOTTOM ELEV. @ 40.5' i-- RAMP DOWN
I
WEIR WALL @ 44.5'
BOTTOM ELEV. @ 40.5'
PUMP
CHAMBER
TOP OF WALL @ 4G.5if A
G G' OVERFLOW WEIR WALL W5.5--) 74'
TOP OF -Ifs ,
WALL 44.5'
0 TOP OF WALL @ 4G.5' ----
4'
LLJ
BOTTOM @ 40.5'
SECTION B-I3
NT5
4' WEIR WALL @ 44. I TOP Of WALL @ 4G.5'
I/40.5'
m RAMP DOWN
I
PLAN VIEW
SCALE: I " = 1 0'
SECTION A -A
NT5
TOP OF WALL @ 4G.5'
i�
TOP OF WEIR WALL @ 44.5'
31'
TOP OF WALL @ 4G.5'
APRON @ 4G.5'
T r.0 'J�) 4G.5'
'OP OF OVERFLOW WEIR
VALL @ 45.5'
SECTION C-C
NT5
WASH DOWN / RECLAIM FACILITY DETAILS
NOTE: SEE 5EPARATE DOCUMENT FOR STRUCTURAL DETAILS.
llil�lll'=�Illi q��i
--1 I III IIIOMPACTED 51_1130AD'E I -' III 11
ROADWAY/PARKING SURFACE DETAIL
NT5
G' x I'-O' x .080 STD ALUM. SIGN
TO READ'VAN ACCESSIBLE'. 501-
TO WD. P05T WITH 318' CANDIUI
PLATED NUTS. BOLT5 t WA511PR:
i'-W x P-O' x .080 5TD. ALUM.
HANDICAPPED PARKING SIGN TO
READ 'RE5EKVED PARK€NG'WITH
IDENTIFICATION 5YM130L. BOLT
TO WD. P05T W1 3/8' CANDIUM
PLATED NUTS, BOLTS AND WASH
9' x 1'-0' x .080 5TD ALUM. 51GI,
TO READ 'MAXIMUM PENALTY $2
G5 20-37.G', BOLT TO WD. P05-
WITH 3.8' CANDIUM PLATED NUT'
BOLT5 AND WA51-1ER5.
TREATED WOOD 41x4' POST.
RES.RVEU
FARRNG
PftmTY
$25D
I Z'
SIGN R7-8E
THI5 5€GN MAY Dff
USED IN PLACE OF
51GN5 R7-8 / K7-8D
VAN ACCE551BLE
- 51GN
(A5 REQUIRED} _
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51GN MOUNTING HFIGHT5
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NT5
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CONDITION I : PEDE5TRIAL PATH DOES NOT
PA55 UNDER OR AROUND SIGN:
CONDITION 2: PEDE5TRIAL PATH GOES BY,
UNDER OR AROUND SIGN:
07
I-I12'R{ffP)ED, I-112'R rYP)
MAx1µUM VAN
250 3181[LYP} Accesslal 318'(iYP}
SIGN R7-5D VAN ACCt551B1 E 51GN
STANDARD COLORS (ALL 51GNS):
&ACiCGROUND - Wk117E
LETTERENG 1 BORDER - GREEN
ARROW - GREEN
FIGURE - WHITE ON BLUE BACKGROUND
CORNER RADIUS 1 112' {ALL SIGNS):
T"I:'ICAL HANDICAP SIGN DETAIL
NT5
2"
3"
1211
5ECTION
CONCRETE WHEEL STOP DETAIL
NT5
STONE 5U4 I vl,,l q- tAtj i €vl,
55
50
45
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LU 40
35
24"
r - CAP - STEAMER H05E CONNECTION
G" SCH 40 PVC 90 BEND
G" SCH 40 PVC RISER PIPE
)UND_
HEAD A55EMBLY DETAIL
G" PVC STRAINER WITH BUILT IN CHECK VALVE BACK FLUSH
END CAP. INTAKE RATIO SHALL EQUAL OR EXCEED 4: 1. HOLE
PATTERN SHALL BE 5UCH TO PROVIDE 100% PULL DOWN TO
LINE OF HOLL5 WITH NO CAVITATION @ 1,000 GPM.
-ELEV. = 3G.5'
%_,vi @ 34.0'
5TRAINEF DFTAII
NTH
MIN. COVER - 24
G •AU I
�L'C� SFO I PERMANENT POOL I
4 1 .0'
C, S II
900 BEND + Cfy 4 �, SEE IIG
O
j 1 1 1/40 SEND VC
j 3 -3G.5'
;BOTTOM
I I ! 140 BEND - 34.0'
1 � I
I 5TOPIL .SUPPORT t- ANCHOR.
{
O 10 20 30 40 50
DISTANCE FROM EDGE OF GRAVEL DRIVE (FT.)
PIPING PROFILE
5CALE: HORIZONTAL: I " = 1 0'
VERTICAL: 1 " = 5'
DRY HYDRANT D ETA I L5
TRAINER DETAIL."
GO
da40/V0, i �� �114 lg -
Approve tarmwater �rra,i otuments
Construction in accordance with these documents is
required by the stormwater psi -relit. North Carolina
rules require that the stormwater system designer
inspect during construction; certify conformity with the
plans and specs: and certify compliance with the
stormwater rules.
Permit# /40 $'7 Date 2� a
by NC. Division of Water Quality
Sheet # RwWlen Date"
1�,5sc�
FINAL DRAWING
NOT ISSUED FOR
CONSTRUCTION
5CALE: SEE DRAWING
DRAWN BY: TMM
CHECKED BY: DMC
ISSUED DATE: f017108
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R15ER WALL
2 1 /2" 5CH 80 PVC MALE
SLIP X FEMALE SLIP
90 BEND (EA. 51DE)
2 1 /2" 5CH 80 PVC
(EA. 51DE)
ORIFICE PIPE
(SEE DETAIL)
MINIMUM TOP OF BANK ELEV. = 45.5'
�31
i
II
SEAL WITH NON -SHRINK GROUT I 1
41 .0' ELEV. i
2 112" 5Ch1 80 ?VC MIPT X FEMALE SLIP
BU5HING (EA. SIDE)
2 112" 5CH 40 GALV. FIPT X FIPT COUPLING5(5)
WITH 5CH 80 GO LV. NIPPLE A5 REO'D.
ORI EICE PIPE DETAIL
NT5
W-1 9-4 (3/4 x 1/8) GALVANIZED BAR GRATING FA5TENED WITH
- J-CLIP5 TO A l 1 /4" x 1 t /4" x 1 /4" GALVANIZED ANGLE FRAME.
EMBED AND MORTAR ANGLE FRAME INTO TOP Of CONCRETE BOX.
TOP OF R15ER @ 4 I .2'
v _
0 O aaQ, 4� O aa�i.ip
48" x 48" CONCRETE ��° � °C6 1 2" MIN,
PAD 8" THICK °��,°��°
GO" x GO" STONE BED
POND OUTLET 5TRUCTURE 5ECTION
NTS
1 8" CORRUGATED
ALUMINUM ALLOY PIPE
INV IN = 39,0'
INV OUT @ JB-C I = 38.3'
3G" x 3G" REINFORCED
CONCRETE BOX
TOP OF i=OREBAY DAM @ 40.0'
IIII
III
BOTTOM @ 37
\-1-1
_
'I1
STORMWATER FACILITIES MAINTENANCE
1.
After every significant runoff producing event and at least monthly:
• inspect the wet detention basin system for sediment accumulation, erosion, trash
accumulations, vegetated cover, and general condition.
• Check and clear the orifice of any obstructions such that drawdown of the temporary pool
occurs within 2 to 5 days. Replace orifice nipples that become damaged.
2.
Repair eroded areas immediately. Re -seed as necessary to maintain good vegetati:1e cover.
Mow vegetative cover to maintain a maximum height of six inches. Remove trash as heeded.
3.
Inspect and repair the collection system (i.e. curb inlets, storm drains, etc.) quarterly In
maintain proper functioning.
4.
Remove accumulated sediment from the wet detention basin main pond and foreba.
immediately after completion of construction and after all denuded areas have been gIlabilized
with a vigorous vegetative cover. Thereafter, remove accumulated sediment in each part of
the pond semi-annually or when water depth is reduced to values presented in the Sid rmwater
Permit. Removed sediment shalt be disposed of in an appropriate manner and shall 6e
handled in a manner that will not adversely impact water quality (i.e. do not stockpile rtear the
wet detention basin, a stream, or any other water body).
5.
Remove cattails and other indige and plants from the wettdeten ion nds Aen they
co-ver50% of the basin- surfacer
6.
Use a pump and/or siphon to draw down the basin in an emergency or as needed for
maintenance. If a pump is used its discharge should be directed into a sump to settle out
sediment prior to overflowing into a natural drainage feature.
7.
Perform other maintenance activities as maybe required to keep the wet detention pond and
collection system in good working order.
Ia 1-- P
PROVIDE ALUMINUM ALLOY OR
APPROVED EQUAL ANTI -SEEP
COLLAR AT POINT OF DEEPE5T
COVER OVER PIPE5.
R 5.00'
ARC LENGTH = 3. 1 G'
2.G5' N 53°20'21"W
1A
5CALE: 5EE DRAWING
DRAWN BY: TMM
CMECAED BY: DMC
155UED DATE: 101 8
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STORMWATER POND PLAN
5CALE: 1 = 20 MINIMUM TOP OF BANK fffV. = 45.5'
Q
TOP Of VEG. 5HELf @ 4 1 .5' -- �= Q
NORMAL PQOL 100 YR. FLOOD POOL @ 42,8'
@ 41 .0' TEMPORARY POOL @ 42.2' _ Z
4
w
BOTTOM OF VLG. 5NLLF @ 40.5'
-r I 1Z
O
ELEVATION = 34' FOR 5TORMWATLK 5T0RAGE CALCULATION PURPOSES - r [��
BOTTOM @ 33'-5EDiM> NT 570PAGf I I I i _ V
5TORMWATER POND SECTION B-B
HORIZONTAL 5CALE: 1 " = 20'
VERTICAL SCALE: 1 " = 4' POND DRAINAGE NOTE
A PUMP SHALL BE PROVIDED FOR THE MAINTENANCE OF
THE POND AND OUTLET 5TRUCTURE AND FOR DRAWING
DOWN THE POND IN THE EVENT OF AN EMERGENCY,
POND VEGETATION NOTE5
Ve�jetative 5helf - Plant Arrowhead Mac
- I F ICkerelweed.IrDO Not I
1 ` ee_InG__LOVBgra55.
3 VEGETATIVE SHELF 3
1 Q NORMAL POOL 10 !
@ 41.0
d� k
LJ i I
2 2
VATION = 34' FOK 5TOKMWATLK
STORAGE CALCULATION PURPQ5F5 -�
5EDiMENT STORAGE
II�
BOTTOM 15.0' 10.0'
@ 33'
elt /__' ° 5320' " 21I-
- __1
5 890 34' 09' EI, 1
R 25.5'
ARC LENGTH = 60. 1 1'
i
30.00' I
5 89° 34' 09' E
'
/-\RU LCNU 1 11 = 6. 1 (
HORIZONTAL SCALE: 1 " = 20'
VERTICAL SCALE: 1" = 4'
194. 14' 5 890 34' 09" E -
235,57' N 890 34' 09" W
PERMANENT POOL DIMEN51ONAL PLAN
SCALE: I" = 20'
5 440 34' 09" E
13.230- 7
R GO.O'
ARC LENGTH = 47. 1 24'
R 10.0'
ARC LENGTH= 23.5G2'
idpproved i ormwater Perini c�utnen
Construction in accordance WLtn these documents is
required by the stormwater permit. North Carolina
rules require that the storrnwater system designer
Inspect during construction; certify Conformity with the
plans and specs: and certify O r,pliance with the
5tormwater rules.
Permit#_/V__C�4 3»7 Date 2 Z
by p NC Dtvlsion of ater uality
Sheet # Revision Date CPS
FINAL Dr\^WING
NOT I55UED FOR
CON5TRUCTION
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C-5
PROJECT # 080508

UTILITY COM PAN I E5
BRUN5WICK ELECTRIC (ELECTRIC)
ATLANTIC TELEPHONE (TELEPHONE * CABLE)
(ON SITE WATER * SEWER)
5HEET INDEX
C5
PROJECT COVER'.' H EET
Cl
EXISTING CONDITI- )N5
C2
51TE PLAN
C3
5TORMWATER AND GRADING PLAN
C4
ER051ON CONTROL PLAN
C5
STORM WATER POND DETAI L5
CG
EROSION CONTROL * STORMWATER NOTE-
C7
MISCELLANEOUS DETAILS
H I
HERITAGE TREE SURVEY
L I
LANDSCAPE PLAN
SITE, 5TORMWATER,
AND EROSION CONTROL PLANS
E3ENTON READY-MIX
OF 13RUN5WICK, INC.
LOCKWOOD FOLLY TOWN5H IP
COUNTY OF E3RUN5WICK
NORTH CAROLINA
5EFFEME.3ER 2008
SITE
Nc 130
O
S1IALLOTTE
VICINITY MAP
NOT TO SCALE
OWNER AND DEVELOPER
BENTON READY -MIX OF BRUNSWICK, INC.
P.O. BOX 797
CONWAY, 5C 25525
5 U RVEYO R
TOMPKINS
LJ LAND
SURVEYING
P.A.
2 1 61 A511 LITTLE RIVER ROAD NW
ASH, NORTH CAROLINA 25420
%- 10) 579-9505
FOUNTAIN HEAD LANDING
G934 SUITE G BEACH DRIVE 5W
:OCEAN ISLE BEACH, NORTH CAROLINA 284G9
PHONE [phone]
SEALSjo �
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FINAL DRAWINGS
NOT ISSUED FOR
CON5TRUCTION

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+ 4I .7 4 57 4 50 44.7G
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+ E.67 + 48.7 1 + 47.02 ++ A3.5G
+ + 1 .44 w„� o-.<.
4 + 2 A.8 + 47.5
4.26
A5.49 5 L + AG. 7 44.74 + 43.G
42.3 + .25 S IL RD
+ 47.56 + k }
+44. 4 .l9 + 4 .17 ++
45.97 + +
+ 3.7 t 4G.73 ++ E� K
89 �� t+4 `76 + 45. 4 +
+ a5. ++ + + 1 L+2`9TLE + 47.33 PP solL RD
8 + 4 + 4G.79$7 + 42.06 + 42.24
4.8
A5 501L R + 42.G7 + 43.25+ 43.00
�47 + 46.50 + 4G. 7 + 4G.77 � + .07 + A4.5 1 + +$++ ++ -
43.87 0... 0 +.:,5.43 �r 44.9G �` o
•I- 4&.47
m
+44.54 , + O VIOLA a-IEW�
O O �+ _�� �i G s LR +42. 1 NIK DB 136-194
C z I K t 46.G5 J t 4 !J3�D + 46.37
C +45.65 42 A1.96 MB 4�-� i
+4 .!2 +4s.A2 N 89°34'09"W +44.i +44.57 872,28's}2,4
+ + 44.30 + 43.57 t + .
t +
O +
� Q
!L � D
SOI
O SOUTHPORT CONCRETI= CO
+ DB 2230-509
MC 34-257
GRA gkbVEL R
a0Z 1 IN7.G,4 BOX
� �R
1NV 37.e51N GMP B
R!SIER
4i.! 1 +
TOP BOX +
O 42.03
1-INV 21N CM
+
MAC CON5TRUCTION
GRA VE MC 20-4g 1
- - �P5�MtN� + vE
+
60 3q.25�
�C
GRA WWI
NOTES
I AREA BY COORDINATE5 .
2 PTZOPFRTY 15 SUBJECT TO ANY AND ALL RESTRICTIVE COVENANTS
FA5EMENT5 AND MINERAL RIGHTS IF APPLICABLE AND
RECORDED IN THE BRUN5W[CK COUNTY REGISTRY.
3 PROPERTY 15 LOCATED IN A FLOOD ZONE. m m � 0 5a 55 z
4 IRON RODS PLACED AT ALL CORNERS UNLESS OTHEFW15F NOTED. r� v mmn o
5 PROPERTY SUBJECT TO ALL ZONING R1 QUfMENT5 OF
~ O (Bzz� X m
N.C. 0 z mom U) �
G ELEVATION DATUM z F r m pm H
ro a D wo z m
0 q a o zmz Ow
7 TH15 SURVEY RETLECTS AN A515UILT OF TH15 PROPERTY A5 OF THE m { o +n p
DATE OF SIGNATURE. o zm zs>
m
o M Oy m+
r O
n � �
O O
z
c
m
m
z
NOTE
m
ThIS 5URVEY REFLECTS THE RESULTS OF A NEW
AND UPDATED SURVEY OF THE PROPERTY SHOWN
COURSES AND D15TANCE5 MAY VARY FROM
PREVIOUS DATA OF RECORD.
C�z�n
O 0O z
JAMES R. TOMPKIN5 A REGISTERED LAND 5URVI=YOP
{1 r CI KTIF`( THAT THE RATIO OF FK> 0510N IS 11
V AND THAT TH15 MAP MEFT5 THE MINIMUM STANDARDS OF PRACTICE O 3 O rn = n
{ n I"OK LAND SURVEYING IN NORTH CAROLINA. O a j
C C +GRAVEL RD
rn Mj ran N
� �
WITNE55 MY HAND AND SEAL THIS _ DAY OF r�
(D z � � 7
z O JAME5 K. TOMPKIN5 RLS # 285! C�
Ln
� n
EXISTINGCONDITIONS REV1510N# DATE PEV15ION
� �44 edlll�����4�lddf!///
Com ass Pointe En Ineerin , PA
Z
M ry b rn z
�'�`' " _ BENTON READY-M(X OF Bi�UNSWfCK INC 0 j -
• �, � ;� � � r- A;';: � �- Fountain Dead Landing
G934 5urte G Beach Dr. 5W SHALLOTTE, NOIRTH CAROLINA o
Ocean Isle Beach, North Carolina 284G9 (9 10) 575-5872
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5TORMWATER NARRATIVE
The proposed Benton Ready -Mix of Brunswick. Inc. facility will be located within the planning jurisdiction of
Brunswick County on tax parcel number 18200092. The site Is just northeast of the Town of Shallotte,
approximately 1 /3 miles north of U5 17. The address Is 197 Barnhill Road, NW. The tract area is 8.55 acres,
approximately 0.3G acres of which are wetlands. No wetlands are proposed to be disturbed during the
construction of this project.
Approximately 39.9% of the site will be covered by "built -upon area" (BUA). The large portion of the BUA will be
recycled asphalt or base material for the movement and parking of concrete mixer trucks. A smaller portion of the
BUA will consist of an off icelmaintenance. building, control house, well tank house, plant hopper/loading/conveyor
system, a mixer fueling area, a helicopter pad, and mi5ceilaneous concrete surfaces associated with the mixer
washdown and concrete reclaim area. 5tormwater runoff from all of the BUA will be collected and directed to a
wet detention pond for treatment with the exception of a small portion of the entrance drive and the helicopter
pad (30' x 30). The helicopter pad will be surrounded by grass surfaces graded to provide overland flow.
5tormwater collection will be by yard inlets, catch ba5m, storm drainage piping, and vegetated 5Wale5-
The 5tormwater pond is designed to treat the runoff from the first I W of rainfall and to remove 90% of
suspended solids in accordance with 5tate regulations. The orifice in the pond outlet structure is sized to draw
down the "treatment volume" in approximately 2 %2 days. In addition, the pond 15 designed to be in compliance with
the Brunswick County 5tormwater ordinance.
In addition to the State stormwater permit, application shall also be made for an NPOES Discharge Permit for
Ready -Mix Gancrete .5ite5. Process wastewater will result from washdown of the surface of the mixer trucks
before they leave the site to deliver concrete and from the dumping of excess concrete from mixer, trucks when
they return from deliveries. A reclaiml5ettlin9 facility will be used to treat the process wastewater. A large
SWALE DATA TABLE
Depth of
Flow Ft.
Veloci
FPS
I.D.
Shape
Bank Slope
Temporary Cover During
Permanent
Design
During
g
During
g
Construction
Cover
Sloe
p ( j
Construction
Permanent (@
Construction
Permanent
(@ 02)
Q10)
(@ Q2)
Q Q10)
ai A.
T i,anguiar
3 1 (H:V) or
Flatter
Jute Net
grass
0 91
ra 7
1 1
2 9
14
A1B
Triangular
3:1 (H:V) or
(special liner not required -
grass
0 38
1 1
12
2-0
0-7
Flatter
apply seedrfartilizerfnullchj
A2A
Triangular
; 3 1 (H:V} of
(special liner not required
grass
0.53
0.7
1 1
2 0
0 E
Flatter
I apply seedlfertilizerlmulch)
A2B
Triangular
31 (H:V) Of
Age Net
grass
1.45
0 5
09
2.9
12
Hatter
_
B1
Triangular
(H:V) or
Fiberglass Roving
grass
0.91
0 9
14
2.2
1.9
Flatter
Flatter
62.A
i naiigular
3 1 (RV} or
Jute Idet
grass
0.91
0 6
1 1
29
12
Flatter
028
Triangular
{ 3 1 (KV) or
! Double Fiberglass Roping
grass
3.33
04
06
27
12
Flatter
!NOTE: Aiiare lute nil is called out, fiberglass or double fibergAssraving may be used, Where fiberglass roping is callad oui, double fiberglass mJng may be used.
LEGEND
WETLAND5
PR0P05ED GRADE
49
M5TING GRADE
-- 49 -
Svv POND DA BOUNDARY
I 5TORM DRAIN WITH ID NOTED
5D-B2
JUNCTION BOX WITH ID NOTED
J13-A5
NOTED
YI-B I
YARD INLET WITH ID
r
CATCH BA51N WITH ID NOTED
CB-A3
PROPOSED 5POT ELEVATION
8 rJ
141LET and ,JUNCTION BOX DATA TABLE
I,
portion of the water used in this operation will be recycled; however, there will be Same overflow into a vegetated
swale- that is part of the 5tormwater collection system that directs runoff to the wet detention pond. The
overflow 15 at the end of the 5etthng basin where a large percent of the 5olyd5 gave been settled out. The settling
- -
/
_ 5 82°43'44"E 141 .76`
\
`
N 88°06'3rJ"E => 18�.44
\
- /
-..-
I I
T YP e
Rini
Elevation
Invert Elevation
ft.
In
In
Out
facility will be routinely cleaned out by front-end loaders which access the comi-=rtments of the settling basin by
ramps-
_ /
75I
l
4
/�
r'I, �,l
Yard Inlet
44.0
38-0
-
_ 1,40.0
_
38.0
._.. .
Further, application will be made to the NC Division of Air Quality for the requrl ' air duality permit for this project.
/ / 52
-�-+
'; l-A.2
Yard Inlet
45.5
49.0
� nJa
41.0
This project drams to a tributary of Williams Branch within the Lumber River Ba Williams Branch 15 classrffed as
1
ly
r 52
l
/ /
/
GB r+3
I
Catch Ba51I1
46.0
41.8
} (nla)
___
_41_S
G; 5w, HQW and has the stream index # 15-25-2-9-3.
i (, I! C
/
r I :A4
Yard inlet
45.2
(nJaa
(n1a)
;
42.2
STORMWATER FACILITIE5 MAINTENANCE
, 4l I \\ \\ \ ��
/ Q 1
1/ l! O I!
JB-45
Junction Box
49.6
46.8
(n1a)
415.8
i . After every significant runoff producing event and at least monthly: \ \ \ \
• Inspect the wet detention basin system for Sediment accumulation, ero5ian, I 5h accumulations, vegetated
cover, and general condition. 1 1 \
0 Check and clear the orifice of any obstructions such that drawdown of the ter jorary pool occurs within 2 to 5 \ 1 11 1
days. Replace orifice nrpple5 that become damaged. 1 1\ 1
2. Repair eroded areas immedrateiy. Re -seed as necessary to maintain good etat+ve cover. Mow vegetatee ( v 1
cover to maintain a maximum height of six inches. Remove trash as needed.
1 l `-
\
1
\
I
`r i-u.6 Yard Inlet 48 8 (n1a)-
/
1 j II
1
t 161 Yarn Inlet 43 2 39.3 I n!a
39.3
YI-B2 Yard inlet 43.2 40.0 E (nfa)
40,0
d
Q
I I
YI-63 Yard Inlet 43.5 (n/a) (nla)
40.5
JB-01 Junction BOX 43.0 38.5 Wa
38.6
3. Inspect and repair the collection system (i.e. yard inlets, storm drams, etc. iarterly to maintain proper, 1
functioning. �\ �l \ �� -'I-AGi- // s. /� 1 // T TORM GRAIN DATA TABLE
4. Remove accumulated sediment from the wet detention basin main pond and : :bay immediately after completion \ \ RIM 48.5 ( \ - J ➢ ' �/
of construction and after all denuded areas have been stabthzed with a vicgorou,_ --cgetative cover. Thereafter, �\ \ \ } () \� I 1 I Type Diameter Length (ft.)Invert Elevation ft.
remove accumulated sediment in each part of the pond semi-annuaily or when im . sr depth rs reduced to 4 feet +n - li I D-AG ) \� % �� i 1 f II �lil. In Out
the forebay and/or the main pond. Removed sediment shall be disposed of in an appropriate manner and shall be ; j , + , / \ i , f
handled in a manner that will not adversely impact water cluahty (i.e. do not sto(' pile near the wet detention basin, t \ '�� SD -Al ROP 36 32 ` 38 0 ' - _ 37.5
a stream, or any other water body). p)� �' - i 1 I A
1
SD-rs2 RCP 18 64 41.0 40.0
5. Remove cattails and other indigenous wetland plants from the wet detention I' )nd when they cover 50% of the J A�
1 \ =
basin surface. These plants shall be encouraged to grow along the vegetated s: elf and forebay berm. _-' �� / f I D .n3 RCP 1$ 112 !{ 41.8 E 41.0
SD r,f RCP 15 64 42.2 41.5
6. Use a pump to draw down the basin emergency emergency or a5 needed for maintenance. The discharge of the pump
should be directed into a sump to settle out sediment prior to overflowing into a natural drainage feature. \ y /
�� /�)-A5 RCP 12 72 46-B 466
7. Perform other maintenance activities as may be required to keep the wet d pntion pond and collection system / \ _ I / // D-ri.s RCP 12 40 47.0 46.$
in good working order. / SWALE AiB
5WALL A A �� \\ '�-_` 1 ��" �D r_.: RC_P 30 288 39.3 t 38.0
j l 1-`��`1,' ` 5WALE 5213 D-B2 RCP 18 56 40.0 39_5......
(STEEPER 5LOFE)
z�_,4 , _
!,I RCP 15 80 40.5 .......40-0 .... RIM 45.2 f/4 _ � �� ... ...... .
i
49 ,/ �� jll SD-C1 i. _?CAAP 18 160 � I � 38.3 37.6
D-C2 Ck-4.P 18 1152 39.0 38.5
i"AAP = CORRUGATED MATCH LINE
/X/ j/ l _` I/ �, ,Li -J/ II I! ALUMINUM Al-
�C. aD-A4 ) / i / / EXI5TING ALIGNMENT r
NEW ALIGNMENT
C13-A I
RIM 4G.0 \ T_ 0 //0
REALIGN EROAD. ACCESS AD. REMOVE 1
4G.5 \ --
� GRAVEL FROM PORTION OF E>ISTING ROAD
03 BEING ABANDONED AND PLAN RECYCLED 1
A5PHALTISA5E ON NEW ROALI ALIGNMENT.
INV 121N BOX
47 , 7.G4
TH15 DRAWING 15 THE PROPERTY Of COMPA55 POINTE ENGINEERING, PA
AND 15 NOT TO BE REPKODUCED IN WHOLE OR IN PART WITHOUT WRITTEN
PERM155ION FROM COMPA55 POINTE ENGINEERING, PA.
(C) COPYRIGHT 2008
ALL RIGHT5 RE5FRVED
SD-A3 \ O //INV 121N GMP �� 121 s X IIIj111�I111
I
4G.3 \� / III U If 37.9 � . 38
o1 11i 1 i11 ti
�� /// / ✓ 4G.5 4G.5 i \ �� ,� i� 'r �I \ I RISILR1 i J III 1I1 I
i/ ! I11
4G.5 4G.3 4 1-1
TOP
RIM
_ BOX
45.5 ' /� I I I 5WALEB2A \� 42.03 �f j INVI 21NCM 1 !!1jllr i
r, aL_` YI-A2 i - I t- 38.� 1 ' _ ! r l L O
SD-A2 4G (MILDER SLOPE) \ II 1 t
� j {` mot/ 1 �\cs 1 SWALE A I Ar' / // � )f 11 1\ 1 /' ! f f�
46.5 11 4G.2 YI-AI
/SD-BIX >SWALE 46lI\\\I /lf)! 1rr / YI-B I )44 I so ) I j
YI-133 v 1 I (V i 1 //I1 / I I I , O� �0/
RIM @43,2 i f III II '1 0 (
RIM 44.0
4S 47 4�; a 4 `- 5D-B2 III RIM 43.5 }I 1\✓ / ��
5WALE AI B i az.z 5D-B3
_ 34 \ RIM @ 43.2 EX I TlNVE
YI-B2 I U �
I I I r
\\�III /
EXI TING
GO' PA5EMENT
COVER 43.5' i MC 34-257
-' N 890 34i 09ii W ,
/ 872 2g' , POND POND OUTLET %1 JB-C 1
I RIS>=R PIPE 7 1 I l II
i I I I
5TORMWATER WET DETENTION POND REALIGN EXISTING ACCE55 ROAD. KtAOVE
EXISTING ALIGNMENT r r 4 II GRAVEL FROM PORTION OF EXI5TIN6 ROAD
(5EE DETAILS) 40 RECYCLED
BEING ABANDONED AND PLACE
1 1(
1 1 -
41 ASPHALTIRAs]" ON NEW ROAD ALIGNAENT.
2, - S D-C I
0 20 AO 80 1GO
1
N 11
wale; I' 40' i
MATCH LINE
FINAL DRAWINGS
NOT 155UED FOR
CONSTRUCTION

ER0510N CONTROL PLAN NARRATIVE
Protect Description
Mr, Keith A. Benton, 5r., owner, plans to build this concrete batch plant under the name of Benton Ready -Mix of Brunswick, Inc. The Site IS fu5t
northeast of the Town of 5hallotte, approximately 1/3 miles north of U5 17. The addre55 is 197 Barnhill Road, NW. The project site consists of 5.55
acres of which 0.3G acres are wetlands. No wetlands are proposed to be disturbed durmg the con5truction of this project.
Approximately 353% of the site Will be covered by "built -upon area" (BUA). The large portion of the BUA will be gravei for the movement and parking of
concrete mixer trucks. A smaller portion of the BUA will con515t of an officelmaintenance building, control house, well tank house, plant
hopper/loadinglconveyor system, a mixer fuelincj area, a helicopter pad, and miscellaneous concrete 5urface5 a55octated with the mixer wa5hdown and
concrete reclaim area. 5tormwater runoff from all of the BUA will be collected and directed to a wet detention pond for treatment with the exception
of a portion of the entrance drive and the helicopter pad (30' x 30`). The helicopter pad will be surrounded by grass surfaces graded to provide
overland flow. 5tormwater collection will be by yard inlets, catch basin, storm drainage piping, and vegetated swales.
51te Description
The project area IS currently wooded except for a mobile home site (unoccupied) in the northeast corner of the site and access road to the mobile home
site. The mobile home will be removed from the site prior to the completion of construction.
The project drains to a tributary of Williams Branch. Wlham5 Branch 15 classified a5 C; 5w; HQW: Relief ranges from a maximum elevation of
approximately 53' at the northeast corner of the site and to a minimum elevation of approximately 42' at the southeast corner of the Site. The primary
5011 types based on the Brunswick County Sod Survey are Baymeade and Goldsboro.
Adjacent Property
Woodlands surround the project to the north, east, and went. The tract to the South of the project 15 cleared and 15 currently besng developed by
Southport Concrete Company.
Planned Fr05ton and Sedimentation Control Practices
The 5tormwater wet detention pond will serve as the primary erosion control feature during and construction of this project. This pond will serve as a
Sediment basin. FoNowing construction and the stabilization of all disturbed surfaces, the pond wih be cleaned of collected Sediment.
Other erosion control features will include sediment fencing, a gravel construction entrance/exit, inlet protection at yard mlets and catch basin, and
temporary check dams within grassed -heed vegetative swales. Protective lining of swales during construction shall be jute net, fiberglass roving, or
double fiberglass roving as Specified in the "5wale Data Table.' All disturbed areas shall be stabilized by vegetative ground cover within 2 1 days
following any completion of grading unless the final gravel surface can be placed by that time. Within 2 1 days following completion of construction,
permanent ground cover over all disturbed areas not covered by BUA shall be. established.
GON5TRUCTION 5EQUIENCE
1. The Contractor shah notify the NCDENK land Quality Section, Wilmington Recjional Office at (9 1 0) 79G-72 15 at least 48
hours prior to beginning construction.
2. Install construction entrance.
3. Clear alignments for all sediment fencing and install sediment fence.
4. Clear and grub the area for the stormwater detention pond. Construct the 5tormwater pond with outlet structure and
storm dram. Apply seed and mulch to disturbed areas and Stabilize all slopes.
5. Clear and grub aiignment5/location5 for swales, storm drains, and Inlets/junction box.
G, Construct swales, inlets/junction box, and Storm drains. 5eed, fertilize, and mulch swales, apply protective liner, and Install
check dams. install inlet protection at yard inlets and catch basin.
7. Clear and grub areas for the drives, parking, and structures.
8. Grade areas for the drives, parkmg, and structures.
9. Place cjravel and construct structures.
10. Apply seed and mulch to all disturbed areas that are not covered with BUA.
I I . Clean out all storm drainage piping.
12. Maintain ail temporary measures until permanent and uniform vegetation is established or permanent ground cover 15
provided.
� > r
�p
5 t.l '- A2A.
ER0510N.CONTROL MAINTENANCE PLAN
I . Check all erosion and Sediment control practices for stability and operation followmg every runoff -producing rainfall event but in no case less than
once every week. Any needed repairs shall be made immediately to maintain all practices as designed.
2. The 5tormwater detention pond shall be cleaned out before the sediment reaches a level 3 feet below the orifice elevation. Immediately after
completion of construction and after all denuded areas have been stabilized with a vigorous vegetative cover, remove accumulated sediment from the
wet detention pond and restore the basin to the design elevattons.
3. Check the 5tormwater pond orifice at least once a week and c#ear it of any obstructions. Replace orifice nippie5 that become damaged.
4.5ediment shall be removed from behind sediment fences before it reaches a level one-half foot deep at the fence. Pence5 shall be repaired as
necessary to maintain a barrier.
5. All seeded areas shall be fertilized, reseeded, and mulched a5 necessary to maintain a vigorous, dense vegetative cover.
G. Leave temporary check darns in -place until all areas upstream are stabilized.
e: i:-:!...PiF_4,. ��ES 11': •q�'.ti#-�.�..rv�.`r�"'�.- �W�T"{d::�C�"i'x+'nTi'i
LEGEND
LIMIT Of D15TURbANCE
WETLANDS
GRA55--LINE1) CHANNEL
5D-B2
5TORM DRAIN WITH 10 NOTED
JB-A5
JUNCTION BOX WITH ID NOTED
YAR'-,� INLET WITH ID NOTED
YI-D
SEDIMENT FENCE
CONSTRUCTION ENTRANCE
i PROTECTION
t
>A
,, "' ✓� - _ . - . �.._... _'._ _--- ---- Ada,,,,:_::,=„r w ., , ,.,,.,.W.�i..�.,�.„. 11
a i _ - •r �>' 5411Ai L 7'A4 lJ �•1 r _ — _ _. -�' •—_ fe��,J i �
r 4 SWALE B%15
1 i ,� / --- `.�.. , /' � � ~t� ,! i I � € (-1-E1=PER SLf;I✓E1
!
MATf�f I �_INr�
JG- r#
EXfSTiNG ALIGNMENT
ji
.'r
j 1 3jj
� Jf
l (
i I REALIGN EXISTING ACCESS GOAD.
GRAVEL FROM PORTION OF EXISTIN
BEING ABANDONED AND PLACE RE
f _ I A5PHALT/BA5E ON NEW ROAD ALIGN
I
,i..l 1
F, I_J 1 - ' w.•''.r i i • 1 ,-.
�uxx:•u.:�.,r�n�:o>�wai,�ai�mwva�,t.::ic�.:�: i-.��;n;,msa
_ l
V
STONE CHECK DAM
5(T F-fA,t _', tiF it OUTLET PROTECTION
--•- _�, r�,� _ _..- -.-. • � 4f 'fit '4' BLOCK #GRAVEL W LET
FF
4 i A2'(W DER sl
�,1"•l;l_F» A I rt I I 1 15 TONS CLA95 A EROSION
CONTROL STONE
,� i1 AIL. E's1 ,
r
I
.' �, f _ ' ,� _ �•----•.�._�.a..,....- ;dam- � -- ! _ - _ _ _ � _- _ �ti"-I .
A -
.T
—
'\ 1
r ._ .. - ... ........_- r`."'�.r""�._. w,swx� ... ,u,a��.��ti +a^rnura,•,:r vws..arnwxn e.rx� .'uwmaks..w ""`••...�^:�� �y�:
-tVALE A i
5 -A I
_ 1
r
1"PON
,
eel}
_. �� ��- /' � _ , `y, �r,. _ - _ - __ __ _..ww„-•"...,....,4.w�..-A+......+ . � �j ��- lw 24,ti ���� ry Y � r ✓i � I� , i I
`r,�`„�.
SPOIL AREA
C j (HELICOFicR PAD TO BE CON5TRUCTF_q I � Yam' '�'8b*� wd° aII6s0V7""
c • J G / ' _ FOLLOWING REMOVAL OF SPOIL.)
I �q
c 7
1 Y.
I L -
.a. ..........._.:...-.....�-._:.,.t:._.:..::...;:,-�..Y.._..A...,;...::...-...-._..---.:...-..y....... ._.. ..-..,.:..�._:.:.e -. -- -. -. .. .._ .d - :. .-.,' ..,.. ..::.:. -..,_w-mot --- - _ - -� -- �.�,--.�� � F-._,.c,-..:-:�-v.�,�.-was-.,...:.�..-.-:..��..:-t�r�ccaee.�rr>_*.�.,-..I�a:.::.�.::wva• ._...;-._-�. �:::n�.FPrr F�:a,.=�+r�._ ��xs:rs�..e�« a=�zr�r _-ti,:
PI L:` :A/ ,'>`' POND POND OUTLET
r W
;�! i�'.Mlr1.�3 r_; �.� ;:I [.�i. I : f i• I'C_ii4ff. �''� ! REALIGN EXISTING ACCE55 ROAD. REMOVE
1 #' GRAVEL FROM PORTION OF EXISTING ROAD
EX15TING ALIGNMENT—
'� BEING ABANDONED AND PLACE RECYCLED
r#I A5PHALT/13A5E ON NEW ROAD ALIGNMENT.
0 20 40 80 I GO
I
Scale.- ,• - 40a.t.--:..,�....J t
TH15 DRAWING 15 THE PROPERTY OF COMPA55 POINTE ENGINFI WNG, PA
AND 15 NOT TO BF REPRODUCED IN WI1OLE OR IN PART WITHOUT WRITTEN
PERM155ION FROM COMPA55 POINTE ENGINEERING, PA.
(C) COPYRIGHT 2005
ALL RIGHT5 RE5ERVED
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NEW ALIGNMENT
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REMOVE
ROAD
CYCLED
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5CALE: I ` = 40'
PRAWN 8Y: TMM
CHECKED BY: DMC
155UED DATE: 10/7105
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C-4
CONSTRUCTION
PROJECT # 080508

R15ER
2 1/2" 5CH 80 PVC MALE
SLIP X f=i-MALE 5LIP
90 Bf<ND (EA. SIDE)
2 1/2" 5CH 80 PVC
(EA. 51 DE)
ORIFICE PIPE
(SEE DETAIL)
48" x 48" CONCRETE
PAD 8" THICK
GO" x GO" STONE BED
3
W1 11
SEAL WITH NON --SHRINK GROUT
PCH 80 PVC MIPT X FEMALE SLIP
S (EA. 51DE)
CH 40 GALV, 1F1PT X FIPT COUPLING5(5)
H 80 G-'�,13V. NIPPLE A5 REQ'D.
ORIFICE PIPE DETAIL
NT5
W-19-4 (3/4 x 1/8) GALVANIZED BAR GRATING fA5TENED WITH
J-CLIPS TO A I 1/4" x 1 1/4" x 1/4" GALVANIZED ANGLE FRAME.
EMBED AND MORTAR ANGLE FRAME= INTO TOP OF CONCRETE BOX.
1211 MIN.
TOP OF RISER @ 4 1 .2'
POND OUTLET 5TRUCTU RE SECTION
NT5
1 8" CORRUGATED
ALUMINUM ALLOY PIPE
INV IN = 39.0'
INV OUT @ JB-C I = 35.31
3G" x 30 REI'AfORCED
CONCRETE BOX
MINIMUM TOP OF BANK ELIEV. = 45.5'
TOP Of FORLBAY DAM @ 40.0—
BOTTOM P 37,
STORMWATER FACILITIES MAINTENANCE
1. Auer every significant runoff producing event and at least monthly:
• Inspect the wet detention basin system for sediment accumulation, erosion, trash
accumulations, vegetated cover, and general condition.
• Check and clear the orifice of any obstructions such that drawdown of the tempo;,,,/ pool
occurs within 2 to 5 days. Replace orifice nipples that become damaged.
2. Repair eroded areas immediately. Re -seed as necessary to maintain good vegetative cover.
Mow vegetative cover to maintain a maximum height of six inches. Remove trash as heeded.
3. Inspect and repair the collection system (i.e. curb inlets, storm drains, etc.) quarterly
maintain proper functioning.
4. Remove accumulated sediment from the wet detention basin main pond and forebay
immediately after completion of construction and after all denuded areas have been sbbilized
with a vigorous vegetative cover. Thereafter, remove accumulated sediment in each part of
the pond semi-annually or when water depth is reduced to values presented in the Stcrmwater
Permit. Removed sediment shall be disposed of in an appropriate manner and shall be
handled in a manner that will not adversely impact water quality (i.e. do not stockpile dear the
wet detention basin, a stream, or any other water body).
5. Remove cattails and other indigenous wetland plants from the wet detention ponds wen they
cover 50% of the basin surface. These plants shall be encouraged to grow along the
vegetated shelf and forebay berm.
6. Use a pump and/or siphon to draw down the basin in an emergency or as needed fot
maintenance. If a pump is used its discharge should be directed into a sump to settle out
sediment prior to overflowing into a natural drainage feature.
7. Perform other maintenance activities as may be required to keep the wet detention pond and
collection system in good working order.
PROVIDE ALUMINUM ALLOY OR
APPROVED EQUAL ANTI -SEEP
COLLAR AT POINT OF DEEPE5T
COVER OVER PIPES.
R 5.00'
ARC LENGTH = 3. 1 G'
2.G5' N 53° 20' 2 1 " W
5TORMWATER POND PLAN
5CALE: 1 " = 20'
NORMAL POOL
@ 41 .0'
100 YK FLOOD POOL @ 42.8'
ELEVATION = 34' FOR 5TORMWATER STORAGE CALCULATION PURP05E5
60TTOM @ 33,
5TORMWATER POND 5ECTION 13-13
�' c 530 20' 2 1 " E
3 890 34' 09' E 1,
R 25.5'
ARC LENGTH = 80. 1 1'
30.00' i 1
5 89" 34' 09' I=
HORIZONTAL SCALE: 1 " -- 20'
VERTICAL SCALE: 1 " = 4'
3I -- VEGETATIVE SLIELF
II� NORMAL POOL
@ 41 .0'
I
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2
1
ELEVATION = 34' FOR STORMWATEK
5TORAGE CALCULATION PURPOSE5
SEDIMENT 5TOKAGE -.
L.
BOTTOM
@ 33'
�I
2
TEMFORARY POOL (W 42.2'
MIMMUM TOP OF DANK FLFV. - 45.5'
Tor OF VEG. SHELF @ 4 1 .5' -
1= _
3
I
BOTTOM OF VEG. 5HELF @ 40.5' —`'
-
SEDIMENT 51-JRAGE I I I
I I -
POND DRAINAGE NOTE
A PUMP 5HALL DE PKOVIDED FOR THE MAINTENANCE Of
THE POND AND OUTLET 5TRUCTUR.E AND 1'OR DRAWING
DOWN THE POND IN THE EVENT OF AN EMERGENCY.
POND VEGETATION NOTES
_ Ve,�etative Shelf - Plant Arrowhead / Duck potato or
Plckerelweed. Do Not plant Cattail
aI or Weeper Lovec3ras5.
5TORMWATER POND SECTION A -A
HORIZONTAL SCALE: 1 " = 20'
VERTICAL 5CALE: 1 " = 4'
194. 14' 5 890 34' 09" E
238.87' N 890 34' 09" W
PERMANENT POOL DIMENSIONAL PLAN
SCALE: 1 " = 20'
5 440 34' 09" E
13.230'
R GO.O'
ARC LENGTH= 47. 1 24'
R 10.0'
ARC LENGTH= 23.5G2'
FINAL DRAWING
NOT 155UED FOR
CONSTRUCTION
5CALE: SEE DRAWING
DRAWN SY: TMM
CHECKED 5Y: DMC
155UED DATE: } 0/7/05
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PROJECT # 050508

CONSTRUCTION NOTES
I . Survey proposed centerline of channel.
2. Determine the existing grade along the centerline and plan final grades to approximate the
value presented in the "5wale Data Table". Inform Engineer if final grades will differ
5ignfigantly from that shown in the table.
3. Remove all trees, brush, stumps, and other ojectionable material from the foundation area
and dispose of properly.
4. Excavate channel. Grade banks at 3: 1 (H:V) or flatter.
5. 5eed, mulch, and fertilize the channel surface as directed in the "Grassing Notes."
G. Apply protective liner as indicated on the "Swale Data Table."
7. Once E5tabh5hed, keep the grass in a healthy vigorous condition at all times,
IMMEDIATELY FOLLOWING GRADING
OF CHANNEL, 5EEDING, t FERTILIZING,
PLACE PROTECTIVE LINER TO PROTECT
CHANNEL BANKS. (SEE 5WALE DATA TABLE.")
11-�1��1111 -
--Ills--IlilIL_ "I
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illl-3 —
ELEVATION
--(III �III�II
Ill/
GRA55 - LINED CHANNEL
NT5
SEEDING MIXTURE
PERMANENT 5PECIE5
-RATE (Ib/acre)
PEN5ACOLA BAHIAGRA55
50
5ERICEA LE5PEDEZA
30
PEN5ACOLA BAHIAGRA55
50
TALL FESCUE
80
TEMPORARY 5PECIE5 (AS REQ'D)
RATE (Iblacre)
WINTER (5EPTFM0FR - APRIL)
TALL FESCUE
50
SUMMER (MA Y-AUGU5T)
GERMAN MILLET
40
G' MAX EXTRA STRENGTH FABRIC
WITHOUT WIRE: PENCE
fi' MAX STANDARD STRENGTH FABRIC'
ELEVATION
N OTE5
I . In5tall Sediment fence at IOCatiOn5 shown on the plans and at locations
necessary to retain sediment on the construction site.
2. Fabric Shall be at least 95% by weight of polyolefin or polyester certified
by the manufacturer or Supplier to conform to the recfuirement5 of A5TM D
G4GO. Particular characteri5tic5 of fabric Shall include: a) a minimum grab
strength of 90 Ib5 in both the machine and x-machine directions; b) a
permittivity of 0.05 Sec- I ; c) an apparent openirlg 51Ze of O.GO min; and,
ultraviolet 5tabiity of 70% after 500 hours of exposure.
3. Filter fabric shall be from a continuous role cut to the length of the
barrier to avoid joints. When joints are nece55ary, Securely fasten the filter
fabric at a support post with 4' minimum overlap to the next post.
ATURAL 4. Po5t5 shall be of the Self -fastener, steel -angle type with a minimum length
ROUND of 5' and a weight of 1.33 Ib/LF.
5. Wire fence Shall be used where post 5paang exceeds G' and/or where
extra Strength fabric 15 not used. Wire fence shall be minimum 14 gauge and
have a max:mum mesh Spacing of G". It Shall extend to the bottom of the
trench.
G. Wire or plastic ties used to fasten wire fens: and/or filter fabric to the
pasts shall have a minimum tensile Strength of 50 Ibs.
7. Do not attach filter fabric to exi5ting trees.
SEDIMENT FENCE DETAIL
NT5
SEEDING NOTES
1. ALL ARr-A5 DISTURBED BY CON5TRUCTION ACTIVITIES, A5 WELL AS 5EVERELY ERODED AREAS,
SHALL BE `=STABILIZED BY ESTABLISHING A PERMANENT GRA55 COVER. SEEDING MIXTURES SHALL BE
SELECTED 6A5ED ON THE 501L TYPE PRESENT, 5EA50NAL CONDITIONS, AND OTHER FACTORS AFFECTING
GROWTH. THE FOLLOWING APPLICATION METHOD5 MAY BE U5ED, ALTHOUGH IT 15 RECOMMENDED A
SPECIALIST BE CONSULTED TO ENSURE DESIRED RESULTS BASED ON PARTICULAR SITE CONDITIONS.
A. CULTIVATE AREA TO A 5-{NCH DEPTH
B. APPLY 3,000 LB/ACKE GROUND AGRICULTURAL LIMESTONE (OR IN ACCORDANCE WITH SOIL TESTS)
C. APPLY 10--1 O-1 O COMMERCIAL FERTILIZER AT 500 LB/ACRE (OR IN ACCORDANCE
WITH 501L TESTS)
D. MULCH WITH GRAIN STRAW AT 3,250 LB/ACRE TO 4,350 LB/ACRE
E. ANCHOR BY TACKING WITH WITH ASPHALT EMULSION, ROVING, NETTING, OR BY CRIMPING WITH
A ?AULCH ANCHORING TOOL
2. WHEN IT 15 NOT P055113LE TO ESTABLISH A PERMANENT GRA55 COVER IN A REASONABLY SHORT
PERIOD OF TIME DUE TO CONDITION5, A TEMPORARY GKA55 COVER SMALL BE ESTABLISHED. THI5
TEMPORARY COVER SHALL INCLUDE ANNUAL GRASSES OR SMALL GRAINS, SUCH AS RYE GRA55.
PERMANENT VEGETATION MUST STILL BE ESTABLISHED. MULCH MUST BE APPLIED WHEN SEASONAL
CONDITIONS DO NOT ALLOW PERMANENT OR TEMPORARY GRASS ESTABLISHMENT, BUT MUST BE USED
FOR THE 5HORTE5T PRACTICAL DURATION, AND NOT WHEN PERMANENT OR TEMPORARY VEGETATION METHODS
MAY BE USED. TOP501L SHALL BE USED WHEN NECESSARY TO ESTABLISH VEGETATIVE COVER.
3. IRRIGATE AS NECESSARY TO OPTIMIZE GROWTH.
GRA551NG- NOTE5
WIRE
FENCE
BACKFILL TRENCH
AND COMPACT
STEEL FILTER THOROUGHLY NATURAL
P05T FABRIC GROUND
�+b UPSLOPF-
4`
_MIN._
�jj ii°'1��-TM-'' * g
N Q�ld� a ���-
DETAIL
D= DIAMETER OF LARGEST CONNECTING PIPE + ! 2".
PRECAST CONC SLAB
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SUPPORTS AT EACH
CORNER
C
G" MiN CRUSHED
STONE
=1I1�---II1= II
COMPACTED�-
5I;15GRADE
YARD INLET DETAIL
NT5
MANHOLE FRAME # COVER
(NC DOT 5TD. 640.54)
PRECAST CONCRETE
SUITABLE FOR H-20
TRAFFIC LOADING
OUTLET PIPE
SEE TABLE FOR 51ZE
AND INV. ELEV_
SEAL WATER -TIGHT
BETWEEN PIPE
BASIN WALL
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SCALE: 5EE PLAN
DRAWN BY: TMM
CHECKED BY: DMC
155UED DATE: 1017/06
N
1211 MIN. Of NCDOT #5 ° V ° RIM tLEV. 4G.0' ^ Ln
OR # 57 WASHED STONE 1.5 FT 6" PRI=CAST
Ln
CLA55 B - --- CONCRETE TOP �_ lL�
RIPRAP rE �, — WHEN REQ'D C O
2' MAX == �I 30" MIN. PRECAST CONCRETE 30" MIN.
�L1
04 00O�Q ooD 71
AT CENTER I� �I SUITABLE FOR h-20
U > ' #57 CLEAN WASHED I I FLOW INV= l 8" TRAFFIC LOADING M 6�
4 TO G FT STONE —ir 15"
FILTER FABRIC
i`
CR055 5ECTION «_"; _-___
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• .0N. CRUSHED STONE �G' MIN. CRUSH STONE cis
00
PLAN SECTION B-B COMPACTED 5UBGRADE
VIEW SECTION A -A �L!
SEAL WATER TIGHT BETWEEN B —
9" MIN I .S MIN PIPE AND CATCH BASIN ��, s
PLACE CONCRETE BLOCKS TWO ----------------
u c����0{ °"� — 2"MESH ",l
COUR5E5 HIGH AROUND INLET ------ ----- OqO d02�CIC)a�Q� CAST IRON HOOD, FRAME,
o� AND GRATE MIN. PERIMETER = S.O FT.
MIN. AREA OPEN = 1.5 SF A or I I A �
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boa �
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STONE CHECK DAM
NITS
G J l.'VfIIWL nV VI\L V!-lIL
TEMPORARY GRAVEL
CONSTRUCTION ENTRANCE
NT5
LPLACE BLOCKS OPEN ON EACH
SIDE OF INLET
SECTION
BLOCK t GRAVEL INLET PROTECTION
NT5
B +1
PLAN
CATCH DA51 N C 5-A3 DETAIL
NT5
NOTES: 1. D = DIAMETER Of LARGEST CONNECTING PIPE + 12".
2. TOP OF BOX 2" TO 4" ABOVE GRADE IN GRASSED AREA.
PRECAST CONC SLAB
51UITABLE FOR H-20
TRAFFIC LOADING
V
I Z MIN CRUSHES
STONE ------------------
COMPACTED 'III —III —I 1
5UBGRADEI—
MANHOLE FRAME COVER
(NC DOT 5TD. 840.54)
JUNCTION BOX DETAIL
NT5
PRECAST CONCRETE
5UITABLL FOR H-20
TRAFFIC LOADING
INLET/OUTLET PIPES)
SEE TABLE FOR SIZE(S)
AND INV. ELEV(5).
SEAL WATERTIGHT
BETWEEN PIPE 4
DA51N WALL
FINAL DRAWING
NOT 155UED FOR
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CON 5TRU CT I O N I PROJECT # 080 103

-.- -.- ____ - -- _- --...�+J+4_•1_ts_, d:i,.fa . l:: t.'dii_!�.��_�.-?_...ice-
C/L-
O
SURFACE ELEV. @ 4G.5'
C/L-
O
C/L-
RECLAIM MACHINE
FLOOR ELEV. @ 4G.5' \
TOP Of WALL
@ 4G.5'
RECYCLE
SAND BIN
4G.5' 4G.5' 4G.5'
EOC EOC EOC
12' T4- 12' 12'
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SLURRY
R1=CLAIM 4OUTLFf
MACHINE
EOC @ 4G.5'
RECYCLE STONE BIN
SURFACE ELEV. @ 4G.5'
4' WEIR WALL @ 44.5'
N
BOTTOM ELEV. @ 40.5'
C/L
N
BOTTOM ELEV. @ 40.5'
A,2'
C/L------- L
4' WEIR WALL @ 44.5'
BOTTOM ELEV. @ 40.5'
IIB
D15CHARGE PIPE C/L 61
TO RECLAIM
MACHINE WEIR WALL @ 44.5'
N-0 1141
BOTTOM ELEV. @ 40.5'
PUMP
CHAMBER
TOP OF WALL @ 4G.5'
C/L -
5
O NOTE: "EOC" = EDGE OF
Q CONCRETE
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1 5'
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START RAMP (TYP.)
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21 m
EDGE Of CONCRETE --�
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TOP OF WALL @ 4G.5'
I f_
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I
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- RAMP DOWN
`TOP OF WALL @ 46.5'
4' WEIR WALL @ 44.5' I
4().5'
-- RAMP DOWN
0
APRON FLAT @ ELEV.=4G.5'
oA
� �
1
ITOF OF WALL @ 4G.5'
I
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G B� C
G' OVERFLOW WEIR WALL @ 45.5' 74'
TOP OF WEIR
WALL @ 44.5` \
TOP OF WALL @ 4G.5' -- -
SECTION B-B
NT5
1� 4 RAMP DOWN
I
a
4` 'iNFIR WALL @ 44.5'
RAMP DOWN
I
I
PLAN VIEW
SCALE: I " = 10'
SECTION A -A
NT5
TOO OF WALL @ 4G.5'
TrF OF WEIR WALL @ 44.5'
TOP OF WALL @ 4G.5'
TOP Of WALL @ 4G.5'
APRON @ 4G.5' -\
Tr,tD r,G 1A1A f I @ 46.5'
'OP OF OVERFLOW WEIR
VALL @ 45.5'
SECTION C-C
WASH DOWN / RECLAIM FACILITY DETAI L5
NOTE: 5EE 5EPARATE DOCUMENT FOR 5TRUCTURAL DETAILS.
NT5
G" MIN.
D SUBGRAD
`--"` I II I
fill -III] IIII-till �IIII'
ROADWAY/PARKING SURFACE DETAIL
NTS
G` x P-0' x .080 5TD ALUM. SIGN
TO READ 'VAN ACCE5$113kf'. BOLT
TO WD. POST WITH 318' CALADIUM
PLATED NUTS, BOLT5 # WA5HER5
1'-0 x V-O' x ,080 5TD. ALUM.
NANDICAPPFD PARKING 51GN TO
READ "REST RV -D PARYJNG'WITFi
IDENTIFICATION SYMBOL. BOLT
TO WD. P05T W13/6' CANDIUM
PLATED NUTS, BOLTS AND WASHERS.
9' x I'-0' x .080 STD ALUM. SIGN
TO READ "MAxiMUM PENALTY $250.----
G5 20-37.6". BOLT TO WD. POST
WITH 3.8' CANDIUM PLATED NUTS,
BOLTS AND WASHERS.
TREATED WOOD 4'x4' P05T.
RESERVED
PAFWNG
N
�y
MAXIMUM
FENAI7Y
$250
51GN R7-8E
THI5 SIGN MAY BE
USED IN PLACE OF
51GN5 R7-8 / R7-8D
F- ,VE6
�.l
I-'__ -
Imo- 2I
5'GN R7-5
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VAN ACCE55113LE
SIGN (AS R1 QUIRED)
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I O
NT5
nl
CONDITION 1 : PEDE5TRIAL PATH DOES NOT
11-
PA55 UNDER OR AROUND SIGN:
CONDITION 2: PtDF:5TRJAL PATH GOES Y
III
UNDER OR AROUND SIGN:
I-112'R(fYP) I-I/2'R(fYP)
M"tmuM VAN
$250 3/8'(TYP) AccFss atE 318"{fYP)
LL
12'
SIGN R7-8D VAN ACCESSIBLE SIGN
STANDARD COLORS (ALL 51GN5):
BACKGROUND - WHITE
LETTERING / BORDER - GREEN
ARROW - GREEN
FIGURP - WHITE ON BLUE BACKGROUND
CORNER RADIUS - 1 I/2' (ALL 51GN5):
TYPICAL HANDICAP SIGN DETAIL
NITS
CONCRETE
2"
3"
1 2"
EEL STOP DETAIL
NT5
STONE 5U1
24"
CAP - STEAMER 1105E CONNECTION
G" SCH 40 PVC'30 BEND
G" SCH 40 PVC RISER PIPE
)UND
HEAD ASSEMBLY DETAIL
G" PVC STRAINER WITH BUILT IN CHECK VALVE BACK FLU5H
END GAP. INTAKE RATIO SHALL EQUAL OR EXCEED 4: 1. HOLE
PATTERN SHALL BE SUCH TO PROVIDE 100% PULL DOWN TO
LINE OF HOLES WITH NO CAVITATION @ 1,000 GPM.
ELEV. = 3G.5'
..��E @ 34.0' -
5TRAINER DETAIL
NT5
55
50-
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SEE "HEAD ASSEMBLY DETAIL."
45
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"STRAINER
90 BEND + 40 SEE DETAIL."
PVC
1
i i 1/4° BE11D I j
G. 5'
35
BOTTOM @
11 1 /40 BEND 34.0'
STONE SUPPORT t. ANCHOR
30
0
10
20 30 40 50 GO
DISTANCE PRCM EDGE OF GRAVEL DRIVE (FT.)
PIPING PROFILE
SCALE: HORIZONTAL: III = 10'
VERTICAL: I " = 5'
DRY HYDRANT DETAILS
FINAL DRAWING
NOT ISSUED FOR
CONSTRUCTION

2 1I2" 5CH 80 PVC MALE
5LIP X FEMALE 5LIP
90 BEND (EA. SIDE)
2 1 /2" 5CH 80 PVC
(EA. 51DE)
ORIFICE PIPE
(SEE DETAIL)
48" x 48" CONCRETE
PAD 8" THICK
GO" x GO" STONE BED
MINIMUM TOP Of BANK ELEV. - 45.5'
,I
3
ilfl_--.-_-ill
5EAL WITH NON-5HRINK GROUT
f_LEV.
CH 80 PVC MIPT X FEMALE 5LIP
3 (EA. 50E)
�H 40 tyALV. FIFT X FIFT COUPLING5(5)
H 80 63ALV. NIPPLE A5 REQ'D.
ORI EICE PIPE DETAIL
NT5
W--19-4 (3/4 x 1 /8) GALVANIZED BAR GRATING FASTENED WITH
J-CLf P5 TO A l 1 /4" x 1 1 /4" x 1 /4" GALVANIZED ANGLE FRAME.
EMBED AND MORTAR ANGLE FRAME INTO TOP OF CONCRETE BOX.
1 2" MIN.
TOP Of RI5ER @ 4 1 .2'
POND OUTLET STRUCTURE SECTION
NTS
18" CORRUGATED
ALUMINUM ALLOY PIPE
INV IN = 39.0'
INV OUT @ J B-C I = 38.3'
3G" x 3G" REINFORCED
CONCRETE BOX
TOP OF FOREBAY DAM @ 40.0' ----1
1
BOTTOM P 37'
STORMWATER FACILITIES MAINTENANCE
9. After every significant runoff producing event and at least monthly:
• Inspect the wet detention basin system for sediment accumulation, erosion, trash
accumulations, vegetated cover, and general condition.
• Check and clear the orifice of any obstructions such that drawdown of the llempopry pool
occurs within) to 5 days. Replace orifice nipples that become damaged.
2. Repair eroded areas immediately. Re -seed as necessary to maintain good vegeiat"Ve cover.
Mow vegetative cover to maintain a maximum height of six inches. Remove trash ar, needed.
3. Inspect and repair the collection system (Le- curb inlets, storm drains, etc.) quarterly F.o
maintain proper functioning.
4. Remove accumulated sediment from the wet detention basin main pond and fareba;f
immediately after completion of construction and after all denuded areas have been slllabilized
with a vigorous vegetative cover. Thereafter, remove accumulated sediment in each Oart of
the pond semi-annually or when water depth is reduced to values presented in the SIOrmwater
Permit. Removed sediment shall be disposed of in an appropriate manner and shall be
handled in a manner that will not adversely impact water quality (i.e. do not stockpile Aear the
wet detention basin, a stream, or any other water body).
5. Remove cattails and other indigenous wetland plants from the wet detention ponds when th y
cover 50% of the basin surface.
B. Use a pump and/or siphon to draw down the basin in an emergency or as needed for
maintenance. If a pump is used its discharge should be directed into a sump to settle out
sediment prior to overflowing into a natural drainage feature.
7. Perform other maintenance activities as maybe required to keep the wet detention p.ind and
collection system in good working order.
PROVIDE ALUMINUM ALLOY OR
APPROVED EQUAL ANTI -SEEP
COLLAR AT POINT OF DEEPE5T
COVER OVER PIPE5.
R 5.00'
ARC LENGTH = 3. 1 G'
2.G5' N53020'21"W
5TORMWATER POND PLAN
SCALE: 1 " = 20'
NORMAL POOL
@ 41 .0'
100 YI2 FLOOD POOL @ 42.8'
El EVATION - 34' FOR STORMWATEK 5TORAGL CALCULATION PURPOSES
DOT TOM @ 33'
5TORMWATER POND SECTION B-B
HORIZONTAL 5CALE: 1 " = 20'
VERTICAL 5CALE: 1 " = 4'
3 ! VEGI=TATIVE 5H1 LP
�J ^ NORMAL POOL
ZJ 8
t
I �I
II -
-2 2
-I
ELEVATION = 34FOR 5TORMWATER
5TORAGE CALCULATION PURP05E5
I
5EDiMFNT STORAGE
BOTTOM 1 I S.O' j 0.0'
@ 33'
`'rGZ' G 53020'21 Ef
5 890 34' 09' E I\
R 25.5'
ARC LENGTH = 80. 1 1'
30.00' I
5 890 .34'09' F
ArU LF_NU I n = 6. 1 G'
MINIMUM TOP OF DANK ELEV- = 45.5'
TOP OF VLG. 5HELF @ 4 1 .5'
TLMPORAKY POOL (a) 42.2'
BOTTOM OF VEG, SHELF @ 40.5'
5EDIMENT 51 ORAGE
POND DRAINAGE NOTE
A PUMP SHALL BE PROVIDED FOR THE MAINTENANCE Of
THE POND AND OUTLET 5TKUCTURE AND FOR DRAWING
DOWN THE POND IN THE EVENT OF AN EMERGENCY.
POND VEGETATION NOTE5
Ve�jetative Shelf - Plant Arrowhead / Duck potato or
Pickereiweed. Do Not plant Cattail
or Weeping Love�aras5.
3
5TORMWATER POND 5 ECT I O N A -A
HORIZONTAL SCALE: 1 " = 20'
VERTICAL SCALE: 1" = 4'
194. 14' 5 890 34' 09" E
238.87' N 890 34' 09" W
PERMANENT POOL DIMENSIONAL PLAN
SCALE: 1 " = 20'
5 440 34' 09" E _
1 3.230'
R GO.0'
ARC LENGTH = 47. 1 24'
R 10.0'
ARC LENGTH= 23.5G2'
Approve St , water Permit Documents
Construction in accordance with these documents is
required by the stormwater pr. rnit. North Carolina
rules require 1h2t the stormwater system designer
inspect during construction; ce iify conformity with the
plans and specs; and certify co?!pliance with the
stormwater rules. )
Permit # /V'C ? Date
by NC Division of water Quality
Shoat Revision 0ato
FINAL DRAWING
NOT ISSUED FOR
CONSTRUCTION
M
Q
W
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z
0
sL
ELI
lLJ
O
5CALE: 5EE DRAWING
DRAWN BY: TMM
CHECKED DY: DMC
65UED DATE: 10/7/03
a
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Q
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LU
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PROJECT # 080508

r
STORMWATER NARRATIVE
The proposed Benton Ready -Mix of Brunswick, Inc. facility will be located within the planning jur15d1r-tf0n of
Brunswick County on tax parcel number 1 8200092. The site s5 just northeast of the Town of 5hallotte,
approximately 1/3 msie5 north of U5 17. The address 15 197 Barnhill Road, NW. The tract area is 8,55 acres,
approximately 0.3G acres of which are wetlands. No wetlands are proposed to be disturbed during the
construction of this project,
Approximately 393% of the site will be covered by built -upon area (BUA). The large portion of the BUA will be
recycled asphalt or base material for the movement and parking of concrete mixer trucks. A smaller portion of the
BUA will consist of an office/maintenance- building, control house, well tank house, plant hopper/loadinglconveyor
system, a mixer fueling area, a helicopter pad, and miscellaneous concrete surfaces associated with the mixer
washdown and concrete reclaim area, 5tormwater runoff from all of the BUA will be collected and directed to a
wet detention pond for treatment with the exception of a small portion of the entrance drive and the helicopter
Pad (30' x 30'). The helicopter pad will be Surrounded by grass surfaces graded to provide overland flow.
5tormwater collection will be by yard inlets, catch basin, storm drainage piping, and vegetated 5WAC5.
The stormwater pond $5 designed to treat the runoff from the hr5t 1 I/z" of rainfall and to remove 50% of
suspended solids in accordance with State regulations. The orifice in the pond outlet structure is sized to draw
down the "treatment volume" in approximately 2 %2 days. In addition, the pond 15 designed to be in compliance with
the Brunswick County 5tormwater ordinance.
In addition to the State 5tormwater permit, application shall also be made for an NPDff5 Drschdrge Permit far
Ready -Mix Concrete .Sites. Process wastewater will result from washdown of the surface of the mixer trucks
before they leave the site to deliver concrete and from the dumping of excess concrete from mixer trucks when
they return from deliveries. A reclaim/settling facility will be used to treat the process wastewater. A large
portion of the water used in this operation will be recycled; however, there will be some overflow Into a vegetated
Swale that is part of the stormwater collection system that directs runoff to the wet detention pond. The
overflow is at the end of the Settling basin where a large percent of the solids rave been settled out. The settling
facility will be routinely cleaned out by front-end loaders which access the compartments of the settling basin by
ramps.
Further, application wit: be made to the NC Division of Air Quality for the required air quality permit for this project.
This project drains to a tributary of Williams Branch within the Lumber River Ba5� i. Williams Branch is classified as
C; 5w, HQW and has the stream index # 15-25-2-9-3.
5TORMWATER FACILITIE5 MAINTENANCE
i . After every signifscant runoff producing event and at least monthly:
® Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulations, vegetated
cover, and general condition.
0 Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within 2 to 5
days. Replace orifice nipples that become damaged.
2. Repair eroded areas immediately. Re -seed a5 necessary to maintain good vegetative cover. Mow vegetative
cover to maintain a maximum height of Six inches. Remove trash as needed.
3. Inspect and repair the collection system (i.e. yard Inlets, storm drains, etc.) quarterly to maintain proper
functioning.
4. Remove accumulated sediment from the wet detention basin main pond and f 1rebay immediately after completion
of construction and after all denuded areas have been stabilized with a vigorous vegetative cover. Thereafter,
remove accumulated Sediment in each part of the pond Semi-annually or when water depth is reduced to 4 feet in
the forebay and/or the main pond. Removed sediment shall be disposed of in an appropriate manner and shall be
handled in a manner that will not adversely impact water quality (i.e. do not stockpile near the wet detention basin,
a stream, or any other water body).
5. Remove cattails and other sndigenous wetland piant5 from the wet detention pond when they cover 50% of the
I
Depth of Flow (Ft.1
Veloci
FPS
I.D.
Shape
Bank Slope
Temporary Cover During
Construction
Permanent
Cover
Design
Slope (°h)
DuringDuring
Permanent (a0
Permanent
Construction
Construction
t Q10)
Q2)
1A
Triangular i
3:1 (H:V) or
Jut€ Filet
grass
0 91
0 7
1.1
29
1.4
Flatter
A1B
Triangular
3.1 (H t1) or
(special linernot required
grass
9
0 38
1.1
1 2
2 0
0 ?
Flatter
apply seedifililizedmulch)
A2A
Triangular I
3 1 (H V) or
(special linerioi required -
grass
0-53
0 7
1.1
2 3
0.5
Flatter
apply seed+filtilizeremulch)
A2B
Triariguiar
or
3 1Flai
Jul, [let
grass
1.45
0 6
0-9
2 3
1 2
er
Bt
Triangular j
3,1 (KV1 or
Fibergliss Roving
grass
0-91
09
1 4
22
1.9
Flatter
B2A
Triangular
3.1 (H V) or
J i) Net
grass
0.51
O fi
11
2 9
3.2
Flatter
826
Triangular '
3 1 (H V.) or
Double Fihrglass Rooting
grass
3.33
0.4
0.6
2-7
12
Flatter
iQTc: "Vvhere juie nei s caibd out. fiberglass or dout,ie fiberglass 0, ng may be used. Vvhere fiberglass romg s catied out double f erg{as€ ruving may Le use6
/
N 58c'003 5" E =
85.44'
5 88043'44" E 14' , 70
-
_
I
'
_
J
/
1
52
i�
ll
1
1
F
1 1
\
J
LEGEND
WETLANDS
PROPOSED GRADE
1=XISTING GRADE
SW POND PA BOUNDARY
STORM DRAIN WITH ID NOTED
JUNCTION SOX WITH ID NOTED
YARD INLET WITH ID NOTED
CATCH BASIN WITH ID NOTED
L PROPOSED SPOT ELEVATION
49
SD-B2
r
JB-A5
_,4r YI-B I
cpzw CB-A3
48.5
INLET and JUNCTION BOX DATA TABLE
Rim
invert Elevation ft.
1. D.
Type
Elevation
In
In
Out
YI-Al
Yard Inlet
44.0
38.0
40.0 I
38-0
YI-A2
Yard Illlet
45.6
41.0
(11/8)
41.0
CB-A3
Catch Basin
40 0
41 8
(ilia)-
YI-A.4
Yard Inlet
4 5. 2
(IVa)
(ilia) .._..W_
_ .-_.
,42.2. _ ....
JB-A5
JLInctiri11 Bow. `
49 G
46.6
(nfa)
-
45.8
YI-A3
Yard Iniet
YI-B1
Yard Illlet
412
393
(rtl'a)
39.3
YI-B2
Yard Inlet i
432
40 0
(nfa)
40.0
YI-133
Yard Inlet
43.5
(i a)
(ira) _
__-..
40-5
JB-C1
A111Ct1011 Bar.
43.0
38.5
(nta)
38.5
\YI-AG til \\ l �pp � / s� / I I / STORM DRAIN DATA TABLE
RIM
48.5 /
11 J/ Diameter
I. D. Tyke Length (#.)
Invert Elevation f.
*D-AG In.
In Out
SD -Al RCP 80 32 _ 3I 375
SG A2 RCP 18 6 _ . .. _._.41.0-._...40 0 .......
SD A3 RCP 18 112 41.8 41 0
_ _ / I w. _ _._ _ --
basin surface. I
/ I
SD A4
RCP
15
41:0.-__._.
G. Use a pump to draw down the basin in an emergency or as needed for maintenance. The dlscharge of the pump } l �'�� �' 50 ' /
to into a natural drainage feature. I / '/ '/ / /�C
SD
IP
1
?
- --Oi$
1~
- -
should be directed Into a sum to settle out Sediment prior overflowing
�\-
' / /�
Ia
R CP
12Q
0
$..__.
7. Perform other maintenance activities aS may be required to keep the wet detention pond and collection system
- \ - - r i -
- -
-_
m good working order. , s SALE /A'�B _ ,
\ /
5WALE F oA J
-
D B1
IZCP
30
288
39 3
38 0
Ln
n
CO
o LU
CO V
OD CV
o m
O m
z
SD-B2 RC18 8
40.05WALE B2B I 395
1 �� \ / / / • j i l (STEEPER 5LOPE) SD-B3 RCP 15 80 1 40.5 40-0
RIM @ 45.2
49 i ,' /' f 11I SD-C1 CAAP 18 160 38.3 1 37 8
YI-A4�-" _..__.
i
SD-C2 CAAP 18 152 391.0 38 5
l
- - - ' - :6AAP = CORRUGATED MATCH LINE
II 1 Al I QV WRE
/ / .. �� EXISTING ALIGNMENTi r
/ / �D-A4
'"// / SA:)- V --� /,/ �� �� / NI NEW ALIGNMENT
CB -A
/ 1 / I
�q%
4G - 0 ,�
/ ! / RIM 4G.0 - /
4G.5 \ _ _ i ,' /� REALIGN EXI5TING ACCE55 ROAD. REMOVE
GRAVEL PROM PORTION OF ECISTING ROAD I
BEING ABANDONED AND PUCE RECYCLED I
ASPHALT/BASE ON NEW ROA' ALIGNMENT. `J
INV I21N 60X
47 ! ��� 7. G4
'� � \ f �i� ll
5D-A3 / '/ I �r--4'� JJI10 INV 121N CM �^ G < X ll)lII Jill,1
% /, , \ / _ / 1 \� llIC09 1-'37.9 8f 11j11f11 I
4G.3 i I fill
G.54G.5 n �I o �
4G.5 4G.3 I51ER �- =` �IlljJfill I
!
1 _ 1t�i_
T) TOP BOX �� r'
5WALE 132A 1 / 11111, 1
INV 21N CM L
1-A2 SD-A2 1 t- J )! lit
I
Y
4G ,. \ I WILDER SLOPE) }il 38.�I1
5WALE A I A� / I I iI
! YI-A 1 / /
46.5 1 SD-B I / SWA>_E B I 1 YI-B 1 I 1111.o�I11 J
,' 1 i YI433 1 Ln
/ �.7 45
J it /� a. 45 RIM @ 44.0 / 45
jl ll 11
/ �5 ...:.: s
A7 47 4G 3 4 ` SD-B2 �I RIM�3.5 II 1 Q I lif
48 i i I I I/
"AI13 l 4z.z � 1 5D-B3
5WALE
7 3 ' os
,=====tll O -1
5D-A I RIM 43.2 1 I I EXI TI N�
YI-B2 Ito
l`✓�/��\\ \� ��� ;r ` ` i O Ii EXI5TiNG
GO' EASEMENT
COVER 43.5'
I N 89°34'09"W 872.28' I )ND POND OUTLET `I JB-C I
/ i----
TH(5 DRAWING 15 THE PROPERTY OF COMPASS POINTE ENGINEERING, PA
AND 15 NOT TO BE REPRODUCED IN WHOLE OR IN PART WITHOUT WRITTEN
PERMI5510N FROM COMPA55 POINTE ENGINEERING, PA.
CC) COPYRIGHT 2008
ALL RIGHT5 RE5ERVED
I 5ER PIPE i �'' �j j ✓ 11I
REALIGN EXI5TING ACCE55 ROAD. REMOVE
STORMWATER WET DETENTION POND ' r r'r~�\ g i/ I GRAVEL FROM PORTION Of EXI5TIN,7' ROAD
(SEE DETAILS) EX15TiNG ALIGNMENT 1 1 1`I i 4 j1 40 BEING ABANDONED AND PLACE REC,(CLED
4 1 A5PHALT/13A5E ON NEW ROAD ALIGNMENT.
42; SD-C I
0 20 40 80 160
y i I
Scale: I' - 40
MATCH LINE
Approved 4ormwater Permit Documents
Construction ire accordance wits; these documents is
required by the stormwater permit. North Carolina
rules require that the stormwater system designer
Inspect during constwc ion; certityf conformity with the
plans and specs; and cerfi1,y coriipliance with the
stormwater rules. API ikoala;PA
Permit # "e' /¢0 3g Z__ Date ; ?,d o
by fgJC> NC i3ivision of Wafer Quali
Sheet # Revision Date to
FINAL D RAWI N G5
NOT 155UED FOR
CONSTRUCTION

!i
It
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Interim Director
Benton Ready -Mix of Brunswick, Inc.
Keith Benton
197 Barnhill Road, Northwest
Shallotte, NC 28462
NORTH CAROLINA
Environmental Quality
March 14, 2019
Subject: Compliance Evaluation Inspection
NPDES General Stormwater Permit NCG140000
Certificate of Coverage NCG140387
Shallotte Ready Mix
Brunswick County
Dear Mr. Benton:
On February 13, 2018, Brian Lambe from the Wilmington Regional Office of the Division of Energy,
Mineral, and Land Resources (DEMLR), conducted a compliance evaluation inspection for Shallotte
Ready Mix located in Barnhill road, Brunswick County, North Carolina. The site drains to a tributary of
Williams Branch which is currently classified as Class C, SW, HQW Waters in the Lumber River Basin.
The following observations were noted during the DEMLR inspection (please see the attached
addendum for additional information about your permit):
1) Stormwater Pollution Prevention Plan SPPP
A Stormwater Pollution Prevention Plan (SPPP) has not been developed, recorded, and properly
implemented.
Yes D No
2) Qualitative Monitoi•in�
Qualitative monitoring has not been conducted and recorded in accordance with permit requirements.
Yes 0 No m
3) Analytical Monitoring
Analytical monitoring has not been conducted and recorded in accordance with permit requirements.
Yes © No 12
Other Observations:
Wastewater comingling with stormwater is disallowed per state Stormwater permit SW8 080937.
Please contact this office to schedule a compliance inspection.
If you need to submit a name or ownership change form, please contact this office.
Thank you for your assistance and cooperation during this inspection. Please be advised that violations
of the NPDES Stormwater General Permit may be subject to a civil penalty assessment of up to
$25,000.00 per day for each violation. If you have any questions, comments, or need assistance with
understanding any aspect of your permit, please do not hesitate to contact Dan Sams or me at (910)796-
7215 or [e-mail]
Sincewty,
in Lambe
ironmental Specialist
d Quality Section
Attachments: '�—�'
1. BIMS Inspection Checklist
cc: 6WiRO Files — Land Quality
North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
L - �0'- It E Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington, North Carolina 28405
910.796.7215

'1
I
Compliance Inspection Report
Perrnit: NCG140387 Effective: 08/01/17 Expiration: 06/30/22 Owner : Benton Ready Mix of Brunswick Inc
SOC: Effective: Expiration: Facility: Shallolte Ready Mix Facility
County: Brunswick
197 Bamhil! Rd
Region: Wilmington
Supply NC 28462
Contact Person: Keith ABenton Title: President Phone: [phone]
Directions to Facility:
From the Intersection of Royal Oak Rd (SR 1845) and US 17 northeast of Shadotte travei east toward Wilmington apx 0.7 miles turn
left on BamhiV Road and travel apx .G33 miles to entrance of site
System Classifications:
Primary ORC: Certification: Phone:
Secondary ORC(s):
On -Site Representative(s):
Related Permits:
Inspection Date: 02/131, - -
Primary Inspector: Brian
Secondary Inspeetor(s):
Time: 01:00PM Exit Time: 02 00PM
Phone:
Reason for Inspection: Routes Inspection Type: Compliance Evaluation
Permit Inspection Type: Ready Mix Concrete StormwaterA/Vastewater Discharge COC
Facility Status: ❑ Compliant ® Not Compliant
Question Areas:
fg Slorm water
(See attachment summary)
Page 1 of 3

Ei
permit: NCO140387 Owner- Facility: Benton Ready Mix of Brunswick Inc
Inspection Date: 0211312019 Inspection Type : Compliance Evaluation Reason for Visit: Routine
Inspection Summary.
SPPP and sampling records were not available during inspection. Contact this office to schedule a re -inspection. Please
review permit and requirements for wastewater discharge. Any wastewater associated with vehicle or equipment cleaning,
raw material stockpiles, or mixing drum cleanout must adhere to permit requirements. Sampling should be quarterly with
effluent limitations per wastewater in HQW. Comingling of stormwater and wastewater qualifies the stormwater pond
discharge as wastewater. However, refer to accompanying state stormwater report for SW8080937, which disallows
wastewater from entering the stormwater pond and system You must, therefor, isolate the wastewater from the state
permitted stormwater system.
Page 2 of 3

v
Permit N=40387 Owner - Facility: Benton Ready Mix of Brunswick Inc
Inspection bate: 0211312019 Inspection Type. Compliance Evaluation Reason for Visit: Routine
Stormwater Pollution Prevention Plan
Yes No NA NE
Does the site have a Stomwater Pollution Prevention Plan?
❑ ❑ ❑
# Does the Plan include a General Location ((jSGS) map?
❑ ® ❑ ❑
# Does the Plan include a "Narrative Description of Practices"7
❑ ❑ ❑
# Does the Plan include a detailed site map including outfall locations and drainage areas?
❑ ® ❑ ❑
# Does the Plan include a list of significant spills occurring during the past 3 years?
❑ ® ❑ ❑
# Has the facility evaluated feasible alternatives to current practices?
❑ ® ❑ ❑
# Does the facility provide all necessary secondary containment?
❑ ® ❑ ❑
# Does the Plan include a BMP summary?
❑ Z ❑ ❑
# Does the Plan include a Spill Prevention and Response Plan (SPRP)?
❑ [19 ❑ ❑
# Does the Pian include a Preventative Maintenance and Good Housekeeping Plan?
❑ [M ❑ ❑
# Does the facility provide and document Employee Training?
❑ 91 ❑ ❑
# Does the Plan include a list of Responsible Parly(s)?
❑ ® ❑ ❑
# Is the Plan reviewed and updated annually?
❑ M ❑ ❑
# Does the Plan include a Stormwater Facitity Inspection Program?
❑ ® ❑ ❑
Has the Stormwater Pollution Prevention Plan been implemented?
❑ ® ❑ ❑
Comment: SPPP was not produced during inspection. Please contact this office for re -inspection
Qualitative Monitoring Yes'No NA NE
Has the facility conducted its Qualitative Monitoring semi-annually? ❑ ® ❑ ❑
Comment: Records were not produced during inspection.
Anal tical Monitorin
. Yes Np NA NE
Has the facility conducted its Analytical monitoring? ❑ ® ❑ ❑
# Has the facility conducted its Analytical monitoring from Vehicle Maintenance areas? ❑ ❑ 2N ❑
Comment: Sampling records not produced during inspection.
Permit and Outfalis
Yes No NA NE
# Is a copy of the Permit and the Certificate of Coverage available at the site? ❑ ® ❑ ❑
# Were all oulfalls observed during the inspection? ❑ ® ❑ ❑
# If the facility has representative outfall status, is it properly documented by the Division? ❑ ❑ ® ❑
# Has the facility evaluated all illicit (non stormwater) discharges? ❑ ®❑ ❑
Comment: No records available onsite.
{Wage 3 of 3

i�
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Interim Director
March 14, 2019
NORTH CAROUNA
,Environmental Quality
Benton Ready Mix of Brunswick; Inc
Attn Keith Benton
197 Barnhill Road
Supply, NC 28462
Subject: Notice of Inspection —Not Compliant
Shallotte Ready Mix Facility
State Stormwater Management Permit No. SW8 080937
Brunswick County
Dear Mr. Benton:
Effective August 1, 2013, the State Stormwater program was transferred from the Division of Water
Quality (DWQ) to the Division of Energy, Mineral and Land Resources (DEMLR). All previous
references to DWQ will remain in older stormwater permits issued prior to August 1, 2013 until they are
modified, Please note that. this letter references DEMUR as the Division responsible for compliance with
the permit.
On August S, 2009, the Governor signed Session Law 2009-406. This law impacted any development
approval issued by the former Division of Water Quality under Article 2I of Chapter 143 of the General
Statues, which was current and valid at any point between January 1, 2008, and December 31, 2010. The
law extended the effective period of any stormwater permit that was set to expire during this time frame
to three (3) years from its current expiration date. On August 2, 2010, the Governor signed Session Law
2010-177, which granted an extra year for a total of four (4) years extension. Accordingly, the Division is
herewith notifying you that the subject permit is now effective from the date of issuance until December
30, 2021 which includes all available extensions.
On February 13, 2019, the Wilmington Regional Office of the Division of Energy, Mineral and Land
Resources (DEMLR) inspected the subject project, located at Barnhill Road in Brunswick County to
determine the status of compliance with the State Stormwater Management Permit Number SW8 080937
issued on October 13, 2008. DEMLR file review and site inspection revealed that the site is not in
compliance with the terms and conditions of this permit. Please find a copy of the completed form
entitled "Compliance Inspection Report" attached to this letter, which summarizes the findings of the
recent inspection.
As indicated in the attached inspection report, the following deficiencies must be resolved:
I . Wastewater entering the stormwater pond is not allowed. Please contact this office for a
compliance inspection. Stormwater from all BUA must flow to the system. All wastewater must
Clow to the closed loop recycle system.
Please be reminded that it is your responsibility as the permittee of record to submit a completed and
signed Permit Transfer Application Form to the Division of Energy, Mineral and Land Resources 30-60
calendar days prior to making any of the below listed changes. This form is available on our website at:
ht s:/Ide .iic.p,ov/about/divisions/energy-mineral-land-res_ou_rceslcncrgy-mineral-land-ruleslstormwater-
program/post-construction.
An ownership change including the sale or conveyance of the permitted project area in whole or in part_
This does not include the conveyance of subdivided residential lots to individuals which are made subject
to a recorded declaration of covenants and restrictions which contain the statements required by the
stormwater permit;
North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
t��QEQ Wilmington Regional Office 1 127 Cardinal Drive Extension I Wilmington, North Carolina 28405
r+S2L�11��94!^N
o.u..e�ea en.eo.,.�mra 910.796.7215

State Stormwater Permit No. SW8 090937
Page 2 of 2
a. The sale or conveyance of the common areas to a Homeowner's or Property Owner's
Association, subject to the requirements of Session Law 201 1-256;
b. Foreclosure proceedings,
c. Filing for I3ankruptcy;
d. Dissolution of the partnership; corporate entity or LI-C. Per NCGS 55-I4-05, a dissolved
corporation continues its corporate existence but may not carry on any business except that
appropriate to wind up and liquidate its business and affairs, which includes the stormwater
management permit.
e. A name change of the owner 1 permittee;
f. A name change of the project;
& A mailing address change of the permittee;
Please be advised that as the permittee, you are required to comply with the terms, conditions and
limitations of the Stormwater ;Management Permit under 'Title 15A North Carolina Administrative Code
21A .1003 and ?Forth Carolina General Statute 143-214.7, including the operation and maintenance of the
permitted stormwater system.
Failure to provide the requested information, or to respond to this letter with a plan of action, including a
timeline to resolve the identified deficiencies, -by March 31, 2019, are considered violations of the
permit. If the requested information is not submitted to this office by the due date, then D1MLR staff
will re -inspect the site and may issue a hlotice of Violation. Please also note that any individual or entity
found to be in noncompliance with the provisions of a stormwater management permit or the stormwater
rules is subject to enforcement action as set forth in NCGS 143 Article 21, including the assessment of
civil penalties of up to S25,000 per day.
If you have any questions, please contact me at the Wilmington Regional Office, telephone number (910)-
796-7215 or via email at [e-mail]
Sincerely,
LILbarf Lambe
Environmental Specialist
Enclosure: Compliance Inspection Report
Permit "Transfer Application Form
GDSlbpl: I11Stormwater\Permits & Projects120081080937 14D12019 03 CF.I_defcient 080937
cc: Stormwater Permit File

J
Compliance Inspection Report
Permit:
SW8080937 Effective:10113/nB
Project:
Shallolle Ready Mix Facility
Owner:
Benton Ready Mix of Brunswick inc;
County:
Brunswick
Region*
Wilmington
Expiration: 12130/21
Adress: 197 Barnhill Rd
CitylStatelZip: Supply NC 28462
Contact Person: Keith A Benton Title: President Phone: [phone]
Directions to Project:
From the intersection of Royal Oak Rd (SR 1845) and US 17 northeast of Shallotte travel east toward Wilmington apx 0.7 miles
turn left on Barnhill Road and travel apx .033 miles to entrance of site
Type of Project: State Stormwater - WD - Detention Pond
Drain Areas: 1 -
On -Site Representative(a):
Related Permits:
Inspection Date: 02/13/2019
Entry Time: 01:OOPM
Primary Inspector: Brian P Lambe
Secondary Inspector(s):
"
Reason for inspection: Routine
Permit Inspection Type: State Stormwater
Facility Status: ❑ Compliant Not Compliant
Question Areas:
® State Stormwater
(See attachment summary)
Exit Time: 02:QOPM
Phone:
Inspection Type: Compliance Evaluation
page.. 1

Permit: SW8050937 Owner - Project- Benton Ready MIX of Brunswick Inc
Inspection Date: 0211312019 Inspection Type Compliance Evalualion Reason for Visit: Routine
Inspection Summary:
Wastewater from concrete operations onsite is comingling with stormwater. Please contact this office to schedule a
compliance meeting.
File Review Yes No NA NE
Is the permit active? ® ❑ ❑ ❑
Signed copy of the Engineer's celifcatlon is in the file? ® ❑ ❑ ❑
Signed copy of the Operation & rvlaintenance Agreement is in the rile? ® ❑ ❑ ❑
Copy of the recorded deed restrictions is in the fife? ❑ 19 ❑ ❑
Comment: No record of deed restrictions.
Built Upon Area Yes No NA NE
Is the site BUA constructed as per the permit and approval plans? H 110 ❑
Is the drainage area as per the permit and approved plans? ❑ M ❑ ❑
Is the BUA (as permitted) graded such that the runoff drains to the system? ❑ [9 ❑ ❑
Comment Additional wastewater }s allowed to comin le with stormwater from mixing drum cleanout and truck
washdown- The closed loop recycle system pump was not operating.
SW Measures
Yes No NA NE
Are the SW measures constructed as per the approved plans? M ❑ ❑ ❑
Are the iniets located per the approved plans? ® ❑ ❑ ❑
Are the outlet structures located per the approved plans? ® ❑ ❑ ❑
Comment
Operation and Maintenance
Yes No NA NE
Are the S1N measures being maintained and operated as per the permit requirements? ❑ ®❑ ❑
Are the SW BMP inspection and maintenance records complete and available for review or provided to ❑ 2 ❑ ❑
DWQ upon request?
Comment: Wastwater is comingling with stormwater in the. stormwater system.
Other Permit Conditions
Yes No NA NE
Is the site compliant with other ecnditions of the permit? ❑ ❑ ❑
Comment:
Other WQ Issues Yes No NA NE
Is the site compliant with other water quality issues as noted during the inspect}on? ❑ N ❑ ❑
Comment: . See NCG140387.
page: 2

i idlllll. l.l.il... i.ill.l..l.l l....tl..i..f[.11
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♦tv sr NO 0 2!"i nV s•n
w r e L%
r.:61x.
Benton Ready Mix of Brunswic
Keith A. Benton
197 Barnhill Rd. NW
k
U.S. POSTAGE )> PITNEY BOWES
ZIP 28405 $ 000.650
02 1 YY
0001399346MAR 15 2019
Supply, NC284E.L'x16e - 2TG lE — _-•..oOLD -
RETURN TO SENDER
NO SUCH STREET
UNABLE TG FORWAR'D

FA
ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Interim Director,
hTiARAifE►.IOU
NORTH CAROLINA
Environmental Quality
Benton Ready Nlix of Brunswick. Inc
Attn Keith Benton
197 Barnhill Road
Supply, 1C 28,162
Subject: Notice of Inspection — Not Compliant
Shal.lolte heady -N ix Facility
State Stormwate.r Nlanagement 1 erinit No. SXV8 080937
Brunswick County
Dear Mr. Benton:
l-ffective August i, 2013, the State Storrnwater program was transferred from the Division of Water
Quality (DWQ) to the Division of Lnergy, Nlinerai and Land Resources (Dl it1LR). All previous
references to DWQ will remain in older stormwater permits issued prior to August 1, 2013 until they are
modified. Please note that this letter references as the Division responsible for compliance with
the permit.
On August 5, 2009, the Governor signed Session Law 2009-406. This law impacted ally development
approval issued by the former Division of Water Quality under Article 21 of Chapter 143 of the General
Statutes, which was current and valid at any point between January 1, 2008,.and December 31, 2010, The
law extended the effective period of any stormwater permit that was set to expire during this time frame
to three (3) years from its current expiration date. On August 2, 2010, the Governor signed Session Law
2010-177, which granted an extra year for a total of four (4) years extension. Accordingly, the Division is
herewith notifying you that the subject permit is.now effective from the date of issuance until December
30, 2021 which includes all available extensions.
On February 13, 2019, the Wilmington Regional Off ice of the Division of Lnergy, Mineral and Land
Resources (DL,N/1LR) inspected the subject project, located at I3arnhill Road in Brunswick County to
determine the status of compliance with the State Stormwater Nlana.gement Permit Number SW8 080937
issued on October 13, 2008. file review and site inspection revealed that the site is not in
compliance with the terms and conditions of this permit. Please find a copy of the completed form
entitled "Compliance Inspection Report" attached to this letter, which summarizes the Findings of the
recent inspection.
As indicated in the attached inspection report, the following deficiencies must be resolved:
1. Wastewater entering the stormwater pond is not allowed. Please contact this office for a
compliance inspection. Stormwater from all 13UA must flow to the system. All wastewater must
(low to the closed loop recycle system.
Please be reminded that it is your responsibility as the permitter of record to submit a completed and
signed Permit Transfer -Application Dorm to the Division of Lnergy, Mineral and Land Resources 30-60
calendar days prior to making any of the below listed changes. This form is available on our website at:
https://dcq.nc.gov/aboLIMivisionslenergy-mineral-land-resourceslener mineral-land-ruleslstormwater-
pro ram post -construction.
An ownership change including the sale or conveyance of the permitted project area in whole or in part.
This does not include the conveyance of'subdivided residential lots to individuals which are made subject
to a recorded declaration of covenants and restrictions which contain the .statements required by the
stormwater permit;
North Carolina Department of Environmental Quality I Division of Energy. Mineral and Land Resources
��DEWilmington Regional Office 1127 Cardinal Drive Extension I Wilmington, North Carolina 28405
Q $
� 910.796.7215

State Stormwater Permit No. SW8 080937 ...
Page 2 of 2
a. The sale or conveyance of the common areas to a HomcowncCs or Property Owner's
Association, subject to the requirements of Session Law 201 1-256;
b. Foreclosure proceedings;
c. riling for 13ankruptcy;
d. ' Dissolution of the partnership, corporate entity or LLC_ Per \CGS 55-14-05, a dissolved
corporation continues its corporate existence but may not carry on any business except that
appropriate to wind up and liquidate its business and affairs, which includes the stormwater
management permit.
o. A name change of the owner i permittee;
f. A name change of the project;
g. A mailing; address change of the permittce;
Please be advised that as the permittee, you are required to comply with the terms, conditions and
limitations of the Storm water %,lanagement Permit under Title 15A Nortli Carolina Administrative Code
21-1 .1003 and North Carolina General Statute 143-214.7, including the operation and maintenance of the
permitted stormwater system.
Failure to provide the requested information, or to respond to this letter with a plan of action, including a
titrtcline to resolve the identified deficiencies, by larch 31, 2019, are considered violations of the
permit. If the requested information is not submitted to this off -tee by the due date, then DEINPI aR staff
will re -inspect the site and may issue a Notice of Violation. Please also note that any individual or entity
found to be in noncompliance with the provisions of a stormwater management permit or the stormwater
rules is subject to enforcement action as set forth in tiCGS 143 Article 21. including the: assessment of
civil penalties of up to 525,000 per day.
11you have any questions, please contact me at the Wilmington Regional Office, telephone number (910)-
796-7215 or via email at Brian. l.,[e-mail]
Sincerely,
vironmental Specialist
Enclosure: Compliance inspection Report
Permit Transfer Application Forrn
G1)Slbpl: %StormwaterTermits & Projects1200K080937 HDV019 03 Cl:l_deficient 080937
cc: Stormwater Perniii bile

.r
Compliance Inspection Report
Permit: SW8080937 Effective:10113/08 Expiration: 12/30/21
Project: Shallotte Ready Mix Facility
Owner: Benton Ready Mix of Brunswick Inc
County: Brunswick Adress: 197 Barnhill Rd
Region: Wilmington
City/State/Zip: Supply NC 28462
Contact Person: Keith A Benton Title: Presldenl Phone: [phone]
Directions to Project:
From the inlersection of Royal Oak Rd (SR 1845) and US 17 northeast of Shallotte travel east toward Wilmington apx 0.7 mites
turn left on Barnhill Road and travel apx .033 miles to entrance of site
Type of Project: State Stormwaler- HD - Detention Pond
Drain Areas: 1,-
On-Site Representative(s):
Related Permits:
Inspection Date: 02/13/2019 Entry Time: 01:00PM Exit Time: 02-OOPM
Primary Inspector: Brian P Lambe Phone:
Secondary Inspector(s): �^
Reason for Inspection: Routine Inspection Type: Compliance Evaluation
Permit Inspection Type: State Stormwaler
Facility Status: ❑ Compliant e Not Compliant
Question Areas:
State Stormwater
(See attachment summary)
page: 1

Permit: SA'8080937 owner • Project: Benton Ready Mix of Brunswick Inc
Inspection Date: 0211312019 Inspection Type Compfiance Evaluation Reason for Visit: Routine
Inspection Summary:
Wastewater from concrete operations onsite is comingling with stormwater. Please contact this office to schedule a
compliance meeting.
File Review
Yes
No NA NE
Is the permit active?
M
❑ ❑ ❑
Signed copy of the Engineer's certification is in the file?
0
❑ ❑ ❑
Signed copy of the Operation & Maintenance Agreement is in the file?
0
❑ ❑ ❑
Copy of the recorded deed restrictions is in the file?
❑
M ❑ ❑
Comment: No record of deed restrictions.
Built Upon Area Yes No NA NE
Is the site BUA constructed as per the permit and approval plans? M ❑ ❑ ❑
Is the drainage area as per the permit and approved plans? ❑ 0 ❑ ❑
Is the BUA (as permitted) graded such that the runoff drains to the system? ❑ 0 ❑ ❑
Comment Additional wastewater is allowed to cominole with stormwater from mixino drum cleanout and truck
washdown. The closed loop recycle system pump was not operating
$W Measures Yes No NA NE
Are the SW measures constructed as per the approved plans? ❑ ❑ ❑
Are the inlets located per the approved plans? ❑ ❑ ❑
Are the outlet structures located per the approved plans? 0 ❑ ❑ ❑
Comment:
Operation and Maintenance Yes No NA NE
Are the SW measures being maintained and operated as per the permit requirements? ❑ M ❑ ❑
Are the SW BMP inspection and maintenance records complete and available for review or provided to ❑ 0 ❑ ❑
OWQ upon request?
Comment: Wastwater is comingling with stormwater in the stormwater s stem.
Other Permit Conditions Yes No NA NE
Is the site compliant with other conditions of the permit? ❑ ❑ ❑
Comment:
Other WQ Issues Yes No NA NE
Is the site compliant with other water quality issues as noted during the inspection? ❑ 0 ❑ ❑
Comment: See NCG140387.
page: 2

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Interim Director
Benton Ready -Mix of Brunswick, Inc.
Keith Benton
197 Barnhill Road, Northwest
Shallotte, NC 28462
NORTH CAROUNA
Environmental Quality
March 14, 2019
Subject: Compliance Evaluation Inspection
NPDES General Stormwater Permit NCG140000
Certificate of Coverage NCG140387
Shallotte Ready Mix
Brunswick County
Dear Mr. Benton:
On February 13, 2018, Brian Lambe from the Wilmington Regional Office of the Division of Energy,
Mineral, and Land Resources (DEMLR), conducted a compliance evaluation inspection for Shallotte
Ready Mix located in Barnhill Road, Brunswick County, North Carolina. The site drains to a tributary of
Williams Branch which is currently classified as Class C, SW, HQW Waters in the Lumber River Basin.
The following observations were noted during the DEMLR inspection (please see the attached
addendum for additional information about your permit):
1) Stormwater Pollution Prevention Plan (SPPP)
A Stormwater Pollution Prevention Plan (SPPP) has not been developed, recorded, and properly
implemented.
Yes ❑ No ■
2) Qualitative Monitoring
Qualitative monitoring has not been conducted and recorded in accordance with permit requirements.
Yes ❑ No ■
3) Analytical Monitoring
Analytical monitoring has not been conducted and recorded in accordance with permit requirements.
Yes ❑ No ■
Other Observations:
Wastewater comingling with stormwater is disallowed per state stormwater permit SW8 080937.
Please contact this office to schedule a compliance inspection.
If you need to submit a name or ownership change form, please contact this office.
Thank you for your assistance and cooperation during this inspection. Please be advised that violations
of the NPDES Stormwater General Permit may be subject to a civil penalty assessment of up to
$25,000.00 per day for each violation. If you have any questions, comments, or need assistance with
understanding any aspect of your permit, please do not hesitate to contact Dan Sams or me at (910)796-
7215 or [e-mail]
Sincerevi
®rl� n Lambe
En ironmental Specialist
La d Quality Section
Attachments:
1. BIMS Inspection Checklist
cc: 00 Files — Land Quality
Dff Q'\ North Carolina Department of Environmental Quality I Division of Energy. Mineral and Land Resources
•/ Wilmington Regional Office i 127 Cardinal Drive Extension I Wilmington, North Carolina 28405
NOMTs CA MNA
°�""�'•a°� 910.79b.7215

Compliance Inspection Report
Permit: NCG140387 Effective: 08/01/17 Expiration: 06/30/22 Owner: Benton Ready Mix of Brunswick Inc
SOC: Effective: Expiration: Facility: Shallolte Ready Mix Facility
County: Brunswick 197 Barnhill Rd
Region: Wilmington
Supply NC 284$2
Contact Person: Keith A Benton Title: President Phone: [phone]
Directions to Facility:
From the intersection of Royal Oak Rd (SR 1845) and US 17 northeast of Shallotte travel east toward Wilmington apx 0.7 miles turn
left on Barnhill Road and travel apx 033 miles to entrance of site
System Classifications:
Primary ORC: Certification: Phone:
Secondary ORC(s):
On -Site Representative(s):
Related Permits:
Inspection Date: 0211312019 ntry Time: 01:OOPM Exit Time: 02 OOPM
Primary Inspector: Brian P Lam Phone:
Secondary Inspector(s):
Reason for Inspection: Routi Inspection Type: Compliance Evaluation
Permit Inspection Type: Ready Mix Concrete StormwaterA/Vastewater Discharge COC
Facility Status: ❑ Compliant e Not Compliant
Question Areas:
Storm Water
(See attachment summary)
Pagel of 3

Permit: NCG140387 Owner - Facility: Benton Ready Mix of Brunswick Inc
Inspection Sate: 0211312019 Inspection Type : Compliance Evaluation Reason for Visit: Routine
inspection Summary:
SPPP and sampling records were not available during inspection. Contact this office to schedule a re -inspection. Please
review permit and requirements for wastewater discharge. Any wastewater associated with vehicle or equipment cleaning,
raw material stockpiles, or mixing drum cleanout must adhere to permit requirements Sampling should be quarterly with
effluent limitations per wastewater in HOW. Comingling of stormwater and wastewater qualifies the stormwater pond
discharge as wastewater. However, refer to accompanying state stormwater report for SW8080937, which disallows
wastewater from entering the stormwater pond and system. You must, therefor, isolate the wastewater from the state
permitted stormwater system.
Page 2 of 3

Permit: NGG140387 Owner - Facility: Benton Reacy Mix of Brunsxick Inc
Inspection Date: 0211312019 Inspection Type : Compliance Evaluation Reason to Visit: Routine
Stormwater Pollution Prevention Plan
Yes No NA NE
Does the site have a Stormwater Pollution Prevention Plan?
❑ 0 ❑ El
# Does the Plan include a General Location (USGS) map?
❑ ■ ❑ ❑
# Does the Plan include a "Narrative Description of Practlws'?
❑ 0 ❑ ❑
# Does the Plan include a detailed site map including outfall locations and drainage areas?
❑ M ❑ ❑
# Does the Plan include a list of significant spills occurring during the past 3 years?
❑ S ❑ ❑
# Has the facility evaluated feasible alternatives to current practices?
❑ 0 ❑ ❑
# Does the facility provide all necessary secondary containment?
❑ ■ ❑ ❑
# Does the Plan include a BMP summary?
❑ d ❑ ❑
# Does the Plan include a Spill Prevention and Response Plan (SPRP)?
❑ 0 ❑ ❑
# Does the Plan include a Preventative Maintenance and Good Housekeeping Plan?
❑0 ❑ ❑
# Does the facility provide and document Employee Training?
❑ 0 ❑ ❑
# Does the Plan include a list of Responsible Party($)?
❑0 ❑ ❑
# Is the Plan reviewed and updated annually?
❑0 ❑ ❑
# Does the Plan include a Stormwater Facility Inspection Program?
❑ O ❑ ❑
Has the Stormwater Pollution Prevention Plan been implemented?
❑ 0 ❑ ❑
Comment: SPPP was not produced during inspection. Please contact this office for re -inspection
Qualitative Monitoring yes No NA NE
Has the facility conducted its Qualitative Monitoiing serni-annually? ❑ 0 ❑ ❑
Comment: Records were not produced during inspection.
Analytical Monitoring Yes No NA NE
Has the facility conducted its Analytical monitoring? ❑ ■ ❑ ❑
# Has the facility conducted its Analytical monitoring from Vehicle Maintenance areas? ❑ ❑ M ❑
Comment: Sampling records not produced during it nspection.
Permit and Outfalls Yes No NA NE
# Is a copy of the Permit and the Certificate of Coverage available at the site? ❑ M ❑ ❑
# Were all oulfalls observed during the inspection? ❑ M ❑ ❑
# If the facility has representative outfall status, is it properly documented by the Division? ❑ ❑ M ❑
# Has the facility evaluated all illicit (non stormwater) discharges? ❑ M ❑ ❑
Comment: No records available onsite.
Page 3 of 3

ORT11 CAROLalirA DIVISION OF
AIR (QUALITY
Inspection Report
Date: 10/02/2017
Facility Data
Benton Ready -Mix of.l1runswick, Inc.
197 Barnhill Road'N"7
Shallotte, INC 28459
Lai: aid 59.9290m Long: 78d 20.5950m
SIC: 3273 / Ready -Mixed Concrete
NAICS: 32732 / heady-Nlix Concrete Manufac-m -ing
Contact Data
Facili1v C()niaci H Authorized Contact j "I tchnical Contact
Dennis Jones Kenneth Huggins Kenneth Huggins
Plant Manager Corporate Manager Corporate NlanaQer
[phone] (plant) [phone] (cell) 1 [phone] (cell)
Comments: Multi -media inspection performed. Inspect facility as
scheduled.
lnspector's Signature: Scott Sanders
Date of Sip-iiatuie 10/2/17
Wilmington Regional Office
Benton Ready-nvlix of Brunswick, Inc_
NC Facility ID ' 1000115
County/F1PS: Brunswick/019
Perinit Data
Permit n/a
Issued n/a
Expires n/a
Classification Permit Exempt
Permit Status Inactive
Current Permit Application(s) None
SI.P
Program Applicability
Comphancc Data
Inspection Date 09/28/2017
Inspector's Nanie Scott Sanders
Operating Status Operating
Compliance Code Compliance - inspections
Action Code ]�-CI-
On -Site Inspection Result Compliance
I Total Actual emissions in TONS/YE�kR: I
TSP
Sot
NOX
VOC
co
PA1110
* IMwP
2012
0.2760
---
---
---
---
0.1260
0_0950
Five Year Violation Historv: None
Date Letter Type Rule Violated
Performed Stack rl-ests since last FCE: None
Date Test Results Test Methods)
* I-hahest RAP Emitted (in pounds
Violation Resolution Date
Source(s) "fester!
"Directions to the site are as follows: From Wilmington, take US-17 West to-,vard Shallotte/Myrtle Beach_ Go
27.2 miles. Turn right onto Barnhill R.d. 'N'W. Follow 0.5 miles and Benton Ready -Mix is at the end of the road
straight ahead. The concrete plant is behind Barnhill Contracting Company's old asphalt plant.

Benton Ready-Nlix of Brunswick; Inc.
October 2, 2017
1. Contact was made with Kenneth Huggins, Corporate Tvlanager, and Dennis .Tones; Plant
Manager to perform a n•rultimedia inspection. Niultimedia team members included Scott
Sanders (DAQ) and Trentt ,fames (DEIMLR).
2. Benton Ready -Mix of Brunswick-, Inc. operates a concrete batch plant that consists of one
cement storage silo, one fiyash silo, and one weigh hopper. A.ground level central dust
collector (1,423 sq. ft.) is installed on all sources.
On Ni larch 1, 2017, 13enton Ready-Nlix requested rescission of Permit No. 09955GO1. Rased
on their letter and supporting documentation; DAQ granted the rescission request on Nilarch
20, 2017. Based oil the information, the facility qualified for exemption fronl ponnttLtng Since
the facility was currently classified as `small" and the facility -wide actual emissions of P1410;
S02. NOx, VOC's, CO, HAl''s, and TAP's from previous years each was less than 5 tons per
,,.car and the total aggregate emissions of these pollutants were less than 10 tons per year.
It was discovered during, this inspection that the facility is currently under new ownership.
Thomas Corcrete is the new owner. This change occurred approximately six months ago
(February 2017). A change of ownership form wi I1 be emailed to .Kenneth Huggins, Corporate
klanager, so that DAQ can update Ibeam to reflect this change.
5. The following equipment was previously contained in Permit No, 09955GO I :
One Concrete batch plant with fabric filter air pollution control systeni(s) installed on all
sources;
1.. One (1) cement mixing weigh hopper and loading operation; and,
2. Silos for cement and flyash. storage.
6. Applicable regulations for Benton Ready-Rlix of Brunswick, Inc. were as follows:
2D. 0202 "Permit Renewal and Emission Inventory Requirement"
2D. 0515 "Particulates from Miscellaneous Industrial Processes"
21). 0521 "Control of 'Visible Emissions"
21). 0535 "Excess Emissions Reporting and Malfunctions"
21). 0540 "Particulates from Fugitive Bust Emission Sources"
21). 061.1 ".1Bagfilter Requirements"
2D. 1100 "Toxic Air Pollutant Control Requirements"
2Q. 0310 "numerous Similar Facilities"
2Q. 0711 "Emission Rates Requiring a Permit"
7. Benton Ready-Nlix of Brunswick, Inc. operates five (5) days per week; fifty-two (52) weeks
per _year. Fugitive emissions are kept to a minimal due to the water spray that is applied to
the property by mixer truck or loader on a regular basis. Gravel has been placed on the haul
roads to decrease fugitive emissions. Fugitive emissions from the haul roads were Meryl
minimal during the inspection. This plant is located in a very rural area with no nearby
Page 2 of 3

Benton Ready -Mix of Brunswick, Inc.
October 2. 2017
surrounding residences.
S. The current loading rate for the site is approximately one hundred (100) yards of cement per
day. Benton Ready -Mix runs five (5) trucks out of this site..
9. Benlon Ready -Mix started producing concrete at this location in March 2009.
10. No loading of cement or flyash to the storage silos via tanker truck was observed during the
inspection.
11. Benton Ready-N,lix of Brunswick, Inc. receives approximately three (3) loads of cement per
week and one (1) load of flyash per week with an average process rate of twenty-five (25)
tons per load per hour. Loading time is usually one hour.
12. Maintenance is performed on the baghouse on a regular basis. Maintenance records are kept
on site for reference. The baghouse contains 104 bags. During the loading of the silos;
delivery pressure from the truck should be kept at a minimurn to avoid bag failure. Benton
Ready-Nlix operates their trucks at a delivery pressure no greater than ten (10) pounds per
square inch. An increase in pressure above this litnit could cause a bag failure. All of the
bags in the central dust collector were changed on Ivlay 15, 2015. This was the 5th time that.
the entire baghouse has been changed out since the plant started up in 2009. The facility logs
a daily magnalielic reading for the central dust collector- (sheet attached). Optimal readings
are between 2 and 3 inches which indicates good pressure. The magnahelic had a reading of
2.5 during the inspcction. Some reclaim ductwork that connects the central dust collector to
the top of the flvash silo was replaced on February 18, 2015..Ductwork was also repaired or
replaced out ]\March 3, 2016.
13. This plant produced 7,386 cubic yards of concrete in 2009, 8,905.25 yards of concrete in
calendar year 2010, 11,291 yards of concrete in calendar year 2011, 17,112 yards of concrete
in calendar year 2012, 16,594 yards of concrete in calendar year 2013, 18,683 yards of
concrete in CY 2014, 15,976 yards of concrete in CY 2015, and 14,187 yards of concrete in
CY 2016. These annual production reports were due by March 1" of each year and have all
been received on time. These reports indicated compliance with the toxic condition in the air
permit. The permit limit for this plant is 120,000 cubic. yards per year. This is based on
distance to the nearest property boundary to be 164 feet.
14. 5-year compliance history —No NOD's or NOV's have been issued during this period.
1.5. Benton. Ready -Mix of Brunswick, Inc. is in compliance with Air Quality regulations.
Page 3 of 3

permit; NCG140367 Owner - Fatuity: Ben' on Rem.., laiix of Brunswick Inc
Inspection Rate- 09/2612017 Inspection Type : Compliance Evaluation Reason for Visit: Follow-up
Inspection Summary:
Facility has developed a SINPPP and is prepared to start quarterly sampling. Pump needs to be fixed on recycle system
and vegetation established on bare slope of pond where pipe was fixed. A PERMIT NAME/OWNERSHIP CHANGE FORM
has been included and needs to be filled out submitted since facility is now operated by Thomas Concrete. It would be
beneficial to maintain pond vegetation for easier access to outfall structure.
Page: 2

Permit: NCG1 to3E7 Owner - Faeiliry: Benton Ready Nfix of BiunswicV Inc
Inspection Date: 0912812017 Inspection Type: Compliance Evaluation Reason for Visit: Follow-up
Stormwater Pollution Prevention Plan
Yes No NA NE
Does the site have a Stormwater Pollution Prevention Plan?
M
❑ ❑ ❑
# Does the Plan include a General Location (USGS) map?
E
❑ ❑ ❑
# Does the Plan include a "Narrative Description of Practices'?
B
❑ ❑ ❑
# Does the Plan include a detailed site map including outfall locations and drainage areas?
®
❑ ❑ ❑
# Does the Plan include a list of significant spills occurring during the past 3 years?
❑ ❑ ❑
# Has the facility evaluated feasible alternatives to current practices?
e
❑ ❑ ❑
# Does the facility provide all necessary secondary containment?
❑ ❑ ❑
# Does the Plan include a BMP summary?
M
❑ ❑ ❑
# Does lire Plan include a Spill Prevention and Response Plan (SPRP)?
❑ ❑ ❑
# Does the Plan include a Preventative Maintenance and Good Housekeeping Plan?
■
❑ [] ❑
# Does the facility provide and document Employee Training?E
❑ ❑ ❑
# Does the Plan include a list of Responsible Party(s)?
❑ ❑ ❑
# Is the Plan reviewed and updated annually?
0
❑ ❑ ❑
# Does the Plan include a Stormwater Facility Inspection Program?
M
❑ ❑ ❑
Has the Stormwater Pollution Prevention Plan been implemented?
®
❑ ❑ ❑
Comment? SWPP has been drafted and on site
Qualitative Monitoring Yes No NA NE
Has the facility conducted its Qualitative Monitoring semi-annually? ❑ 2 ❑ ❑
Comment: No_montioring being done. but plan on starting sampling. this quarter
Analytical Monitoring Yes No NA NE
Has the facility conducled its Analytical monitoring? ❑ e ❑ ❑
# Has the facility conducted its Analytical monitoring from Vehicle Maintenance areas? ❑ 0 ❑ ❑
Comment: NO montioring being done, but plan on starting sampling this quarter
Permit and Outfalls Yes No NA NE
# Is a copy of the Permit and the Certificate of Coverage available at the site? S ❑ ❑ ❑
# Were all oulfalls observed during the inspection? ❑ ❑ ❑
# If the facility has representative outfall status, is it properly documented by the Division? ❑ ❑ ® ❑
# Has the facility evaluated all illicit (non stormwater) discharges? ❑ ❑ ® ❑
Comment:
Page 3

Compliance Inspection Report
Permit: NCG140387 Effective: 08/01/17 Expiration: 06/30/22 Owner : Benton Ready Mix of Brunswick Inc
SOC: Effective: Expiration: Facility: Shallolte Ready Mix facility
County: Brunswick 197 Bamhlll Rd
Region: L^filmington
Supply NC 28462
Contact Person: Keith A Benton Title: President Phone: [phone]
Directions to facility:
From the intersection of Royal Oak Rd (SR 1845) and US 17 northeast of Shailotle travel east toward kNilminglon apx 0.7 miles turn
left on Barnhill Road and travel apx .033 miles to entrance of site
System Classifications:
Primary ORC: Certification: Phone:
Secondary ORC(s):
On -Site Representative(s):
Related Permits:
Inspection Date: 09/2812017 Entry Time: 10:00AM Exit Time: 11:30AM
Primary Inspector: Elsie C James Phone:
Secondary Inspoctor(s):
Scott Sanders
Reason for Inspection: Follow-up Inspection Type: Compliance Evaluation
Permit Inspection Type: Ready IvIlix Concrete SlormwalerMlastewater Discharge CDC
Facility Status: ❑ Compliant Not Compliant
Question Areas:
® Storm Water
(See attachment summary)
Page: 1

Compliance Inspection Report
Permit: NCG140387 Effective: 07/01/16 Expiration: 06/30/17 Owner: Benton Ready Mix of Brunswick Inc
SOC: Effective: Expiration: Facility: Shallotte Ready Mix Facility
County: Brunswick 197 Barnhill Rd
Region: Wilmington
Supply NC 28462
Contact Person: Keith A Benton Title: President Phone: [phone]
Directions to Facility:
From the intersection of Royal Oak Rd (SR 1845) and US 17 northeast of Shallotle travel east toward Wilmington apx 0.7 miles turn
left on Barnhill Road and travel apx .033 miles to ontrance of site
System Classifications:
Primary ORC: Certification: Phone:
Secondary ORC(s):
On -Site Representative(s):
Related Permits:
Inspection Date: 08/17/2016 rEntry Time: 11:30AM Exit Time: 12:30PM
Primary Inspector: Elsie C Jame Phone:
Secondary Inspector(s):;
Brian S West
Reason for Inspection: Routine Inspection Type: Compliance Evaluation
Permit Inspection Type: Ready Mix Concrete Stormwater/Wastewater Discharge CDC
Facility Status: ❑ Compliant a Not Compliant
Question Areas:
E Storm Water
(See attachment summary)
Page: 1

,*S
Permit: NCG140387 Owner - Facility: Benton Ready Mix of Brunswick Inc
Inspection pate: 08117120116 Inspection Type : Compliance Evaluation Reason for Visit: Routine
Inspection Summary:
A Stormwater Pollution Prevention Pollution Plan (SWPPP)has not been developed. No monitoring has been conducted.
Provided a copy of the general permit, technical bulletin, and sampling sheets to Kenneth Huggins and discussed what is
required for SWPPP and sampling. Mr. Huggins stated that he will address non-compliance issues in a timely manner and
begin the sampling
Page: 2

Permit: NCG140387 Owner - Facllily: Benton Ready Mix of Brunswick Inc
Inspection Date: 08/1712016 Inspection Type : Compliance Evaluation Reason for visit: Rou; ne
Analytical Monitoring Yes No NA NE
Has the facility conducted its Analytical monitoring? ❑ ❑ ❑
# Has the facility conducted its Analytical monitoring from Vehicle Maintenance areas? ❑ i ❑ ❑
Comment, No Monitoring being done
Permit and Outfalls Yes No NA NE
# Is a copy of the Permit and the Certificate of Coverage available at the site? ® ❑ ❑ ❑
# Were all outfalls observed during the inspection? ' ❑ 1111
# If the facility has representative outfall status, is it properly documented by the Division? ❑ ❑ ® ❑
# Has the facility evaluated all illicit (non stormwater) discharges? ❑ ❑ ■ ❑
Comment. Good housekeeping and set on site
Qualitative Mon.itoring Yes No NA NE
Has the facility conducted its Qualitative Monitoring semi-annually? ❑ ® ❑ ❑
Comment: No_monitoring_being done
Stormwater Pollution Prevention Plan
Yes No NA NE
Does the site have a Slormwater Pollution Prevention Plan?
❑
❑ ❑
# Does the Plan include a General Location (USGS) map?
❑
❑ ❑
# Does the Plan include a "Narrative Description of Practices"?
❑
❑ ❑
# Does the Plan include a detailed site map including outfall locations and drainage areas?
❑
0
❑ ❑
# Does the Plan include a list of significant spills occurring during the past 3 years?
❑
N
❑ ❑
# Has the facility evaluated feasible alternalives to current practices?
❑
0
❑ ❑
# Does the facility provide all necessary secondary containment?
❑
0
❑ ❑
# Does the Plan include a BMP summary?
❑
0
❑ ❑
# Does the Plan include a Spill Prevention and Response Plan (SPRP)?
❑
0
❑ ❑
# Does the Plan include a Preventative Maintenance and Good Housekeeping Plan?
❑
N
❑ ❑
rr Does the facility provide and document Employee Training?
❑
❑ ❑
# Does the Plan include a list of Responsible Party(s)?
❑
❑ ❑
# Is the Plan reviewed and updated annually?
❑
0
❑ ❑
# Does the Pian include a Stormwaler Faciiity Inspection Program?
❑
0
❑ ❑
Has the Stormwater Pollution Prevention Plan been implemented?
❑
■
❑ ❑
Comment: SWPPP has not been developed
Page: 3

Compliance Inspection Report
Permit: NCG140387 Effective: 07101/16 Expiration: 06/30117 Owner: Benton Ready Mix of Brunswick Inc
SOC: Effective: Expiration: Facility: Shallotte Ready Mix Facility
County: Brunswick 197 Barnhill Rd
Region: Wilmington
Supply NC 28462
Contact Person: Keith A Benton Title: President Phone: [phone]
Directions to Facility:
From the intersection of Royal Oak Rd (SR 1845) and US 17 northeast of Shallotte travel east toward Wilmington apx 0,7 miles turn
left on Barnhill Road and travel apx .033 miles to entrance of site
System Classifications:
Primary ORC: Certification: Phone:
Secondary ORC(s):
On -Site Representative(s):
Related Permits:
Inspection Date: 08/17/2016 try Time: 11:30AM Exit Time: 12:30PM
Primary Inspector: Elsie C Jame Phone:
i
Secondary Inspector(s):
Brian S West
Reason for Inspection: Routine Inspection Type: Compliance Evaluation
Permit Inspection Type: Ready Mix Concrete Stormwater/Wastewaler Discharge COC
Facility Status: Compliant Not Compliant
Question Areas:
® Storm Water
(See attachment summary)
Page:

Permit• NCG140387 Owner - Facility: Benton Ready Mile of Brunswick Inc
Inspection pate: 08/1712016 Inspection Type: Compliance Eva;cation Reason for Visit: Routine
Inspection Summary:
A Stormwater Pollution Prevention Pollution Flan (SWPPP)has not been developed. No monitoring has been conducted.
Provided a copy of the general permit, technical bulletin, and sampling sheets to Kenneth Huggins and discussed what is
required for SWPPP and sampling. Mr_ Huggins slated that he will address non-compliance issues in a timely manner and
begin the sampling
Page: 2

Permit: NCG140387 owner - Facility: Benton Ready Mix of Brunswick Inc
Inspection Date: 08/1712016 Inspection Type : Compliance Evaluation Reason for Visit: Routine
Analytical Monitoring Yes No NA NE
Has the facility conducted its Analytical monitoring? ❑ 0 ❑ ❑
# Has the facility conducted its Analytical monitoring from Vehicle Maintenance areas? ❑ ❑ ❑
Comment: No Monitoring being done
Permit and dutfalls Yes No NA NE
# Is a copy of the Permit and the Certificate of Coverage available at the site? E ❑ ❑ ❑
# Were all outfalls observed during the inspection? 0 ❑ ❑ ❑
# If the facility has representative outfall status, is it properly documented by the Division'? ❑ ❑ 0 ❑
# Has the facility evaluated all illicit (non stormwater) discharges? ❑ ❑ 0 ❑
Comment: Good housekeeping and set on site
Qualitative Monitoring Yes No NA NE
Has the facility conducted its Qualitative Monitoring semi-annually? ❑ ®❑ ❑
Comment: No monitoring being done
Stormwater Pollution Prevention Plan
Yes No NA NE
Does the site have a Stormwater Pollution Prevention Plan?
❑
® ❑ ❑
# Does the Plan include a General location (USGS) map?
❑
® ❑ ❑
# Does the Plan include a "Narrative Description of Practices"?
❑
® ❑ ❑
# Does the Plan include a detailed site map including outfall locations and drainage areas?
❑
❑ ❑
# Does the Plan include a list of significant spills occurring during the past 3 years?
❑
®❑ ❑
# Has the facility evaluated feasible alternatives to current practices?
❑
❑ ❑
# Does the facility provide all necessary secondary containment?
❑
❑ ❑
# Does the Plan include a BMP summary?
❑
❑ ❑
# Does the Plan include a Spill Prevention and Response Plan (SPRP)?
❑
0 ❑ ❑
# Does the Plan include a Preventative Maintenance and Good Housekeeping Plan?
❑
0 ❑ ❑
# Does the facility provide and document Employee Training?
❑
■ ❑ ❑
# Does the Plan include a list of Responsible Party(s)?
❑
0 ❑ ❑
# Is the Plan reviewed and updated annually?
❑
0 ❑ ❑
# Does the Plan include a Stormwater Facility Inspection Program?
❑
0 ❑ ❑
Has the Stormwater Pollution Prevention Plan been implemented?
❑
0 ❑ ❑
Comment: SWPPP has not been developed
Page: 3

Mr. Keith Benton, Sr.
Page 3 of 3
February 26, 2009
Engineer's Certification
lCdC No. NCG140387}
it , as a duly registered Professional Engineer in the
State of North Carolina, having been authorized to observe {periodically, weekly, full time}
the
construction of the project,
Project Name Location
for the Permittee hereby state that, to the best of my abilities, due care and diligence was
used in the observation of the following installations:
• Construction of a wastewater treatment system at the Benton Ready -Mix of Brunswick
site.
I certify that the construction of the above referenced project was observed to be built
within substantial compliance and intent of the approved plans and specifications.
Signature
Registration No.
Date
Mail this Certification to: Stormwater Permitting Unit
NC Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
4

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT
AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
FAX [phone]
Facsimile transmittal
To: Don Covil, Compass Point Engineering Fax: [phone]
From: Ken Pickle, Stormwater Permitting Unit, Date: February 26, 2009
Division of Water Quality
Phone: [phone] Pages: 7
E-mail: [e-mail]
Urgent For review Please comment Per your request FYI, no action Please recycle
Subject: Copy COC NCG140387, Benton Ready -Mix of Brunswick
Don,
Again, I apologize for the delay on my desk, and for my failure to meet my promises.
Here's the COC for Benton Ready -Mix.
Please recall our conversations on a few points:
a) The general permit NCG14 sets a permit limit of 30mg/L TSS on the wastewater
discharge. However, Benton will discharge to a HQW water for which NC rule at 15A NCAC
2B .0224(b)(ii) requires that wastewater discharges be limited to 20 mg/L. I`ve
incorporated that extra restriction on the face of the COC, and I've notified the permittee of
that extra restriction in the transmittal letter.
b) We are seeing too many BMPs (wet detention basin) built way below design drawing
dimensions. Please alert your client that you have a responsibility to certify the
construction, and that DWQ will inspect this facility prior to its operation. We don't want '4
any embarrassments.
c) In consideration of the significant delay already on my desk, and despite not having
drawings in the final form, I've approved the submittal based on our conversation, and on J
my expectation that you will revise the final drawings in order to: eliminate the spec to
encourage cattails; provide a hardened conveyance from the recycle bins overflow into the
southern Swale leading to the wet pond; identify for your client where his
monitoring/sampling point is located on the drawing.
t
u
d) Your engineering argument did not address the requirements to show pH compliance (a
single pH sample from a sister plant is not sufficient). However after subsequent
consideration, I've concluded that you're the. PE, and you've presented the design in
response to the permit requirements. Please alert your client that his obligation is to meet
the permit discharge limits, and that any exceedence of those limits is a violation of the
permit.

MCDENR
North Carolina Department of Environment and Natural Resources v
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
February 26, 2009
Mr. Keith Benton, Sr.
P,O.Box 797
Conway, South Carolina 29528
Subject: General Permit No. NCG140000
Benton Ready -Mix of Brunswick, Inc.
COC No. NCG140387
Brunswick County
Dear Mr. Benton:
In accordance with your application for a discharge permit received on October 30,
2008, we are forwarding herewith the subject certificate of coverage (COC) to discharge
under the subject state - NPDES general permit. This permit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of
Agreement between North Carolina and the US Environmental Protection Agency dated
October 15, 2007 (or as subsequently amended).
Please note that the face of your COC contains a special additional
requirement limiting total suspended solids (TSS) in your wastewater discharge to
no greater than 20 mg/L. This additional limitation is consistent with !North Carolina
environmental rules found at 15A NCAC 02B .0224(b)(0), the -water quality standards
applicable to High Quality Waters (HQW). In accordance with the information presented in
your application, your facility will discharge to waters classified as HQW, and the cited rule
applies to site discharges of commingled stormwater and wastewater from your proposed
wet detention basin.
Please take notice that this certificate of coverage is not transferable except after
notice to the Division of Water Quality. The Division of Water Quality may require
modification or revocation and reissuance of the certificate of coverage. This permit does
not affect the legal requirements to obtain other permits which may be required by the
Division of Water Quality or permits required by the Division of Land Resources, Coastal
Area Management Act, or any other federal or local governmental permit that may be
required.
Your COC also serves as DWQ's Authorization to Construct treatment facilities.
Please notify the Wilmington Regional Office, telephone number [phone], at least
forty-eight (48) hours in advance of operation of the installed facilities so that an in -place
inspection can be made. Such notification to the regional supervisor shall be made during
the normal office hours from 8:00 a.m. until 5:00 p.m. on Monday through Friday,
excluding state holidays.
MAR 0 2 ?009
Wetlands and Stormwater Branch One
1617 Mail Service Center, Raleigh, Narth Carolina 27599-1617 B�: N Orth C 1r o 1 in [a
locaton: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phc,ne: 919.807-6300 i FAX: [phone] Customer Service: 1 •B77-623-6746 / �/ l`
Internet: www,ncwaterquality.org Yv ,/
An Equal opportunity 1 AfGrmalive Action Employer / A

Mr. Keith Benton, Sr.
Page 2 of 3
February 26, 2009
Upon completion of construction and prior to operation of this permitted facility,
DWQ must receive the attached Engineer's Certification from a professional
engineer certifying that the permitted facility has been installed in accordance
with the NPDES Permit, the associated Authorization to Construct, and the
approved plans and specifications. Please mail the certification to the Stormwater
Permitting Unit, 1617 Mail Service Center, Raleigh, NC 27699-1617.
Please note that any future construction, installation, or modification of wastewater
treatment facilities (including process wastewater recycle systems) will require an
Authorization to Construct (ATC) prior to construction per 15A NCAC 2H .0138 & .0139. You
must submit, in triplicate, plans/specifications and design calculations, stamped and sealed
by a professional engineer, with a letter requesting an ATC to the Stormwater Permitting
Unit, 1617 Mail Service Center, Raleigh, NC 27699-1617.]
One (1) set of approved plans and specifications is being forwarded to you. The
Permittee shall maintain a copy of the approved plans and specifications on file for the life of
the facility. If you have any questions concerning the General Permit, your COC, or the
Authorization to Construct, please contact Ken Pickle at telephone number [phone].
Sincerely,
for Coleen H. Sullins
cc: Wilmington Regional Office, Linda Willis, with enclosure
DWQ Central Files, letter only
Stormwater Permitting Unit Files, with enclosure
Don Covil, Compass Pointe Engineering, letter only via fax
Enclosure: Approved permit application materials

nr
~y 01KIDENR
North Carolina Department.of Environment and
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
February 26, 2009
Mr. Keith Benton, Sr.
P.O.Box 797
Conway, South Carolina 29528
Natural Resources
Dee Freeman
Secretary
Subject_: General Permit No. NCG140000
Benton Ready -Mix of Brunswick, Inc.
COC No. NCG140387
Brunswick County
Dear Mr. Benton;
In accordance with your application for a discharge permit received on October 30,
2008, we are forwarding herewith the subject certificate of coverage (COC) to discharge
under the subject state - NPDES general permit. This permit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of
Agreement between North Carolina and the US Environmental Protection Agency dated
October 15, 2007 (or as subsequently amended).
Please note that the face of your COC contains a special additional
requirement limiting total suspended solids (TSS) in your wastewater discharge to
no greater than 20 mg/L. This additional limitation is consistent with North Carolina
environmental rules found at 15A NCAC 02B .0224(b)(0), themater quality standards
applicable to Nigh Quality Waters (HQW). In accordance with the information presented in
your application, your facility will discharge to waters classified as HQW, and the cited rule
applies to site discharges of commingled stormwater and wastewater from your proposed
wet detention basin.
Please take notice that this certificate of coverage is not transferable except after
notice to the Division of Water Quality. The Division of Water Quality may require
modification or revocation and reissuance of the certificate of coverage. This permit does
not affect the legal requirements to obtain other permits which may be required by the .
Division of Water Quality or permits required by the Division of Land Resources, Coastal
Area Management Act, or any other federal or local governmental permit that may be.
required.
Your COC also serves as DWQ's Authorization to Construct treatment facilities.
Please notify the Wilmington Regional Office, telephone number [phone], at least
forty-eight (48) hours in advance of operation of the installed facilities so that an in -place
inspection can be made. Such notification to the regional supervisor shall be made during
the normal office hours from 8:00 a.m. until 5:00 p.m. on Monday through Friday,
excluding state holidays.
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: 1-877-623.6748
Internet: www.ncwaterquality.org -
An Equal opportunity 1 Affirmative Action Employer
One
NorthCarolina
Aa mra!!y

Mr. Keith Benton, Sr.
Page 2 of 3
February 26, 2009
Upon completion of construction and prior to operation of this permitted facility,
DWQ must receive the attached Engineer's Certification from a professional
engineer certifying that the permitted facility has been installed in accordance
with the NPDES Permit, the associated Authorization to Construct, and the
approved plans and specifications. Please mail the certification to the Stormwater
Permitting Unit,, 1617, Mail Service Center, Raleigh, NC 27699-1617.
Please note that any future construction, installation, or modification of wastewater
treatment Facilities (including process wastewater recycle systems) will require an
Authorization to Construct (ATC) prior tp construction per 15A NCAC 2H .0138 & .0139. You
must submit, in triplicate, plans/specifications and design calculations, stamped and sealed
by a professional engineer, with a letter requesting an ATC to the Stormwater Permitting
Unit, 1617 Mail Service Center, Raleigh, NC 27699-1617.]
One (1) set of approved plans and specifications is being forwarded to you.. The
Permittee shall maintain a copy of the approved plans and specifications on file for the life of
the facility. If you have any questions concerning. the General Permit, your COC, or the
Authorization to Construct, please contact Ken Pickle at telephone number [phone].
Sincerely,
for Coieen H. Sullins
cc, Wilmington Regional Office, Linda Willis, with enclosure
DWQ Central Files, letter only
Stormwater Permitting Unit Files, with enclosure
Don Covil, Compass Pointe Engineering, letter only via fax
Enclosure: Approved permit application materials

Mr. Keith Benton, Sr.
Page 3 or 3
�_,.. February 26, 2009
Engineer's Certification (COC No;, NCG140387)
1, , as a duly registered Professional Engineer in the
State of North Carolina, having been authorized to observe (periodically, weekly, full time)
the
construction of the project,
Project Name Location
for the Permittee hereby state that, to the best of my abilities, due care and diligence was
used in the observation of the following installations:
• Construction of a wastewater treatment system at the Benton Ready -Mix of Brunswick
site.
I certify that the construction of the above referenced project was observed to be built
within substantial compliance and intent of the approved plans and specifications.
Signature
Registration No.
Date
Mail this Certification to: Stormwater Permitting Unit
NC Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617 "

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
G LNERAL PERMIT NO. NCG140000
CERTIFICATE OF COVERAGE No. NCG140387
STORMWATER AND PROCESS WASTEWATER DISCHARGES
NATIONAL POLLUTANT DISCHARGE h.LIMINATION SYSTEM
In compliance with the provision ofNorth Carolina General Statute 143-215.I, other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the
Federal Water Pollution Control Act, as amended,
Benton Ready -Mix ol' Brunswick, Inc.
is hereby authorized to construct and operate a process wastewater treatment system consisting of a reclaimer, a six -
chamber recycle and §cttling; structure, and a wet detention basin, and is hereby authorized to discharge commingled
process wastewater and stormwater from a facility located at
Benton Ready -Mix of Brunswick, Inc.
197 Banihill (toad, Northwest
Shallotte, North Carolina
Brunswick County
to receiving; waters designated as an unnamed tributary to Williams Branch, a class C Sw HQW water.in the
Lumber River Basin in accordance with the effluent limitations, monitoring; requirements, and other conditions set
forth in Parts 1, I1:, 111, 1V, V, and VI of General Permit No. NCG140000, as attached. Additionally, discharges
from the wastewater treatment system are further limited to containing no more than 20 mg;/L of'fotal Suspended
Solids.
This certificate of coverage shall become effective February 26, 2009,
This Certificate of Coverage shall remain in effect for the duration of the General Permit.
Signed this day February 26, 2b09.
.(w Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

0
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mp"o
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far -is
74
19 r
`J
9* W
Name: HOLDEN BEACH Location: 033* 59' 40.8" N 078* 20' 50.5" W
Date: 2/26/2009 Caption; Benton Ready -Mix of Brunswick, Inc.
Scale: I inch equals 2000 feet ut to Williams Branch
Class C Sw HOW
Copyright (C) 1997, MapteGh, Inc,

•
Markers
Name: Discharge Site - NCG140387
Short Name: Dschrg
Coordinates: 034° 00' 08.1" N, 078' 20' 41.8" W
Comment: Benton Ready -Mix of Brunswick, Inc., Subbasin 03-07-59, Lumber River Basin,
Brunswick County, unnamed tributary to Williams Branch, class C Sw HQW,
USGS quad L25NE

Permit No. NCG140000
monitoring instrumentation, and copies of all reports required by this General Permit for a period
of at least 5 years from the date of the sample, measurement, report or application. This period
may be extended by request of the Director at any time.
7. 1npection and Entry
The permittee shall allow the Director, or an authorized representative (including an authorized
contractor acting as a representative of the Director), or in the case of a facility which discharges
through a municipal separate storm sewer system, an authorized representative of a municipal
operator or the separate storm sewer system receiving the discharge, upon the presentation of
credentials and other documents as may be required by law, to;
a. Enter upon the permittee's premises where a regulated facility or activity is located or
conducted, or where records must be kept under the conditions of this General Permit;
b. Have access to and copy, at reasonable times, any records that must be kept under, the
conditions of this General Permit;
C. Inspect at reasonable times any facilities, equipment (including monitoring and control
equipment), practices, or operations regulated or required under this General Permit; and
d. Sample or monitor at reasonable times, for the purposes of assuring General Permit
compliance or as otherwise authorized by the Clean Water Act any substances or
parameters at any location.
SECTION E: REPORTING REQUIREMENTS
1. Discharge Monitoring Reports
Samples analyzed in accordance with the terms of this permit shall be submitted to the Division
on Discharge Monitoring Report forms provided by the Director. Submittals shall be delivered to
the Division no later than 30 days from the date the facility receives the sampling results from the
laboratory.
When no discharge has occurred from the facility during the report period, the permittee is
required to submit a discharge monitoring report, within 30 days of the end of the sampling
period, giving all required information and indicating "NO FLAW" as per 15A NCAC 0213.0506.
The permittee shall record the required qualitative monitoring observations on the SDO
Qualitative Monitoring Report form provided by the Division, and shall retain the completed
forms on site. Visual monitoring results should not be submitted to the Division, except upon
DWQ's specific requirement to do so.
SubjDitbng Reports
Two signed copies of the Discharge Monitoring Reports (DMRs) shall be submitted to:
Central Files
Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Visual monitoring results should not be submitted to Central Files unless requested by DWQ.
Availability of Reports
Except for data determined to be confidential under NCGS 143-215.3(a)(2) or Section 308 of the
Federal Act, 33 USC 1318, all reports prepared in accordance with the terms shall be available for
public inspection at the offices of the Division of Water Quality. As required by the Act, analytical
data shall notbe considered confidential. Knowingly making any false statement on any such
report may result in the imposition of criminal penalties as provided for in NCGS 143-215.613 or in
Section 309 of the Federal Act.
Part V Page 8 of 9

Permit No. NCG140000
4. NQD_SSormwater Discharges
If the storm event monitored in accordance with this General Permit coincides with a non-
stormwater discharge, the permittee shall separately monitor all parameters as required under
the non-stormwater discharge permit and provide this information with the stormwater
discharge monitoring report.
S. Planned Changes
The permittee shall give notice to the Director as soon as possible of any planned changes at the
permitted facility which could significantly alter the nature or quantity of pollutants discharged.
This notification requirement includes pollutants which are not specifically listed in the General
Permit or subject to notification requirements under 40 CPR Part 122.42 (a).
6. Anticipated Noncompliance
The permittee shall give notice to the Director as soon as possible of any planned changes at the
permitted facility which may result in noncompliance with the General Permit requirements.
7, ills
The permittee shall report to the local DWQ Regional Office, within 24 hours, all significant spills
as defined in Part Vlll of this permit. Additionally, the permittee shall report spills including: any
oil spill of 25 gallons or more, any spill regardless of amount that causes a sheen on surface
waters, any oil spill regardless of amount occurring within 3_00 feet of surface waters, and any oil
spill less than 25 gallons that cannot be cleaned up within 24 hours.
8, Reporting Bypass
a. Anticipated bypass. If the permittee knows in advance of the need for a bypass, it shall
submit prior notice, if possible at least ten days before the date of the bypass; including an
evaluation of the anticipated quality and affect of the bypass.
h. Unanticipated bypass. The permittee shall submit notice within 24 hours of becoming aware
of an unanticipated bypass.
9. Twenty-four Hour Reporting
The permittee shall report to the central office or the appropriate Regional Office any
noncompliance which may endanger health or the environment. Any information shall be
provided orally within 24 hours from the time the permittee became aware of the circumstances.
A written submission shall also be provided within five (5) days of the time the permittee
becomes aware of the circumstances.
The written submission shall contain a description of the noncompliance, and its causes; the
period of noncompliance, including exact dates and times, and if the noncompliance has not been
Corrected, the anticipated time compliance is expected to continue; and steps taken or planned to
reduce, eliminate, and prevent reoccurrence of the noncompliance.
The Director may waive the written report on a case -by -case basis if the oral report has been
received within 24 hours.
10. Other Noncompliance
The permittee shall report all other instances of noncompliance not reported above under
Twenty-four hour reporting at the time monitoring reports are submitted.
11. Other Information
Where the permittee becomes aware that it failed to submit any relevant facts regarding this
General Permit or in any report to the Director, it shall promptly submit such facts or information.
Part V Page 9 of 9

Permit No. NCG140000
PART VI LIMITATIONS REOPENER
This General Permit shall be modified or alternatively, revoked and reissued, to comply with any
applicable effluent guideline or water quality standard issued or approved under Sections 302(b) (2)
(c), and (d), 304(b) (2) and 307(a) of the Clean Water Act, if the effluent guideline or water quality
standard so issued or approved:
a. Contains different conditions or is otherwise more stringent than any effluent limitation in
the General Permit; or
b. Controls any pollutant not limited in the General Permit.
The General Permit as modified or reissued ender this paragraph shall also contain any other
requirements in the Act then applicable.
PART VII ADMINISTERING AND COMPLIANCE MONITORING FEE
REQUIREMENTS
The permittee must pay the administering and compliance monitoring fee within 30 (thirty) days
after being billed by the Division. Failure to pay the fee in timely manner in accordance with 15A
NCAC 2H .0105(b)(4) may cause this Division to initiate action to revoke the Certificate of Coverage.
PART VIII DEFINITIONS
1. ABC
See Clean Water Act.
2. Adverse Weather
Adverse conditions are those that are dangerous or create inaccessibility for personnel, such as
local flooding, high winds, or electrical storms, or situations that otherwise make sampling
impractical. When adverse weather conditions prevent the collection of samples during the
sample period, the permittee must take a substitute sample or perform a visual assessment
during the next qualifying storm event. Documentation of an adverse event (with date, time and
written narrative) and the rationale must be included with your SPPP records. Adverse weather
does not exempt the permittee from having to file a monitoring report in accordance with the
sampling schedule. Adverse events and failures to monitor must also be explained and reported
on the relevant DMR.
3. A11awable Non-Stormwater Discharges
This permit regulates Stormwater discharges. Non-stormwater discharges which shall be
allowed in the Stormwater conveyance system are:
(a) All other discharges that are authorized by a non-stormwater NPDES permit.
(b) Uncontaminated groundwater, foundation drains, air -conditioner condensate without added
chemicals, springs, discharges of uncontaminated potable water, waterline and fire hydrant
flushings, water from footing drains, flows from riparian habitats and wetlands.
(c) Discharges resulting from fire -fighting or fire -fighting training.
Parts V1, VIl and VIII Page 1 of 5

Permit No. NCG140000
4. Best Management Practices (BMPs)
Measures or practices used to reduce the amount of pollution entering surface waters. BMPs
may take the form of a process, activity, or physical structure. More information on BMPs can be
found at: http://cfpub.epa.gov/npdes/stormwater/menuofbmps/index.rfm.
5. Bypass
A bypass is the known diversion of stormwater or wastewater from any portion of a stormwater
or wastewater control facility including the collection system or wastewater treatment facility,
which is not a designed or established operating mode for the facility.
6. Sulk Storage of Liquid Products
Liquid raw materials, manufactured products, waste materials or by-products with a single
above ground storage container having a capacity of greater than 660 gallons or with multiple
above ground storage containers located in close proximity to each other having a total
combined storage capacity of greater than 1,320 gallons.
7. Certificate of Coverage
The Certificate of Coverage (CDC) is the cover sheet which accompanies the General Permit upon
issuance and lists the facility name, location, receiving stream, river basin, effective date of
coverage under the permit and is signed by the Director.
8. Clean Water Act
The Federal Water Pollution Control Act, also known as the Clean Water Act (CWA), as amended,
33 USC 1251, et. seq.
9. Detergents
Detergents, additives, polymers, brighteners and any other solvent or cleaning agents used on
site in the industrial process shall be biodegradable, and the pH must be adjusted to within 6 to 9
standard units. Wherever possible, permittees are encouraged to use phosphate -free detergents.
A current list of all chemicals, with use schedule, quantity, MSDS sheets and aquatic toxicology
data shall be kept on site and up to date in the SPPP.
14.
Division or DWO
The Division of Water Quality, Department of Environment and Natural Resources
Director
The Director of the Division of Water Quality, the permit issuing authority.
EN1CC
The North Carolina Environmental Management Commission
Grab Sample
An individual sample collected instantaneously. Grab samples must he taken within the'first 30
minutes of discharge.
Hazardous Substance
Any substance designated under 40 CFR Part 116 pursuant to Section 311 of the Clean Water
Act.
15, Measurable Storm Event
A measurable storm event is a storm event that results in an actual discharge from the permitted
site outfall. The previous measurable storm event must have been at least 72 hours prior. The
72-hour storm interval may not apply if the permittee is able to document that a shorter interval
is representative for local storm events during the sampling period, and obtains approval from
the local DWQ Regional Office. Two copies of this information and a written request letter shall
Parts V1, VI1 and VIII Page 2 of S

Permit No. NCG140000
be sent to the local DWQ Regional Office. After authorization by the DWQ Regional Office, a
written approval letter must be kept on site in the permittee's SPPP.
16. Municipal Separate Storm Sewer System
A stormwater collection system within an incorporated area of local self-government such as a
city or town.
17, Notice of Intent
The state application form which, when submitted to the Division, officially indicates the
facility's notice of intent to seek coverage under a General Permit.
1.8. Permittee
The owner or operator issued a certificate of coverage pursuant to this General Permit.
19. Point Source Discharge of Stormwater
Any discernible, confined and discrete conveyance including, but not specifically limited to, any
pipe, ditch, channel, tunnel, conduit, well, or discrete fissure from which stormwater is or may he
discharged to waters of the state.
20. Process Wastewater
For the purposes of this permit, process wastewater is wastewater generated from the following
activities:
(a) Vehicle and equipment cleaning operations. For the purposes of this permit, vehicle and equipment
cleaning is limited to the rinsing of the external surfaces of vehicles and equipment. If detergents are
used, they must be biodegradable, and the pH must be adjusted to within 6 to 9 standard units. Wherever
possible, permittees are encouraged to use phosphate -free detergents.
(b) Raw material stockpile wetting operations. This includes wetting for control of temperature and
moisture content. Washing of raw materials is not authorized under this permit.
(c) Mixing drum -cleaning operations. This includes vehicle mixing drum and facility mixing drum cleaning.
It also includes flushing the bed of a dump truck, if used to deliver concrete to a job site. If detergents are
used, they must be biodegradable, and the pH must be adjusted to within 6 to 9 standard units. Wherever
possible, permittees are encouraged to use phosphate -free detergents.
(d) Commingled stormwater and authorized process wastewater shall be considered process
wastewater.
21. Representative Outfal] Status
When it is established that the discharge of stormwater runoff from a single outfall is
representative of the discharges at multiple outfalls, the DWQ may grant analytical
representative outfall status. Representative outfall status allows the permittee to perform
analytical monitoring at a reduced number of outfalls. Qualitative monitoring shall be performed
at all discharges locations regardless of representative outfall status (ROS).
22. Secondary Containment
Spill containment for the contents of the single largest tank within the containment structure
plus sufficient freeboard to allow for the 25-year, 24-hour storm event.
23. Section 313 Water Priority Chemical
A chemical or chemical category which:
(a) Is listed in 40 CFR 372.65 pursuant to Section 313 of Title III of the Superfund Amendments and
Reauthorization Act (SARA) of 1986, also titled the Emergency Planning and Community Right -
to -Know Act of 1986;
(b) Is present at or above threshold levels at a facility subject to SARA title I11, Section 313 reporting
requirements; and
(c) Meets at least one of the following criteria:
Parts Vl, V1I and Vill Page 3 of 5

Permit No. NCG140000
(1) Is listed in appendix D of 40 CFR part 122 on Table 11 (organic priority pollutants), Table 111
(certain metals, cyanides, and phenols) or Table 1V (certain toxic pollutants and hazardous
substances);
(2) is listed as a hazardous substance pursuant to Section 311(b)(2)(A) of the CWA at 40 CFR
116.4; or
(3) Is a pollutant for which EPA has published acute or chronic water quality criteria.
24. Severe Property Damage
Substantial physical damage to property, damage to the control facilities which causes them to
become inoperable, or substantial and permanent loss of natural resources which can reasonably
be expected to occur in the absence of a bypass. Severe property damage does not mean
economic loss caused by delays in production.
25. Significant Materials
Includes, but is not limited to: raw materials; fuels; materials such as solvents, detergents, and
plastic pellets; finished materials such as metallic products; raw materials used in food
processing or production; hazardous substances designated under Section 101(14) of CERCLA;
any chemical the facility is required to report pursuant to Section 313 of Title III of SARA;
fertilizers; pesticides; and waste products such as ashes, slat; and sludge that have the potential
to be released with stormwater discharges.
26. Significant Spills
Includes, but is not limited to: releases of oil or hazardous substances in excess of reportable
quantities under Section 311 of the Clean Water Act (Ref: 40 CFR 110.10 and CFR 117.21) or
Section 102 of CERCLA (Ref: 40 CFR 302.4).
27. Stormwater Discharge Outfall (SDO
The point of departure of stormwater from a discernible, confined, or discrete conveyance,
including but not limited to, storm sewer pipes, drainage ditches, channels, spillways, or
channelized collection areas, from which stormwater flows directly or indirectly into waters of
the State of North Carolina.
28. Stormwater Runoff
The flow of water which results from precipitation and which occurs immediately following
rainfall or as a result of snowmelt.
29. Stormwater Associated with Industrial Activity
The discharge from any point source which is used for collecting and conveying stormwater and
which is directly related to manufacturing, processing or raw material storage areas at an
industrial site. Facilities considered to be engaged in "industrial activities" include those
activities defined in 40 CFR 122.26(b)(14). The term does not include discharges from facilities
or activities excluded from the NPDES program.
30. Storrawater.Pollution Prevention Plan (SPPP)
A comprehensive site -specific plan which details measures and practices to reduce stormwater
Pollution and is based on an evaluation of the pollution potential of the site.
31. Ten Year Design Storm
The maximum 24 hour precipitation event expected to be equaled or exceeded on the average
once in ten years. Storm information can be found in the State of North Carolina Erosion and
Sediment Control Planning and Design Manual
32. Total Flow
The flow corresponding to the time period over which the entire storm event occurs. Total flow
shall be either, (a) measured continuously, (b) calculated based on the amount of area draining
Parts VI, VI1 and VIII Page 4 of 5

Permit No. NCG140O0C
to the outfall, the amount of built -upon (impervious) area, and the total amount of rainfall, or (c)
estimated by the measurement of flow at 20 minute intervals during the rainfall event.
33, Total Maximum Daily Load (TMDL)
TMDLs are written plans for attaining and maintaining water quality standards, in all seasons,
for a specific water body and pollutant. (A list of approved TMDLs for the State of North Carolina
can be found at http://h2o.enr.state.ne.us/tmdl/)
34, Toxic Pollutant
Any pollutant listed as toxic under Section 3O7(a) (1) of the Clean Water Act.
35. Vehicle and equipment leanin
For the purposes of this permit, this cleaning is limited to the rinsing of the external surfaces of
vehicles and equipment. If detergents are used, they must be biodegradable, and the pH must be
adjusted to within 6 to 9 standard units. Wherever possible, permittees are encouraged to use
phosphate -free detergents.
36. yChicleMaintenance-Activity
Vehicle rehabilitation, mechanical repairs, painting, fueling, lubrication, vehicle cleaning
operations, or airport deicing operations.
37. Visible Sedimentation
Solid particulate matter, both mineral and organic, that has been or is being transported by
water, air, gravity, or ice from its site of origin which can be seen with the unaided eye.
38. Summer 7010
The lowest average 7-day stream flow that is expected to occur once every 10 years during the
summer months.
39. 2Ly-e—ar. 24 hour storm event
The maximum 24-hour precipitation event expected to be equaled or exceeded, on the average,
once in 25 years.
Parts V1, VI1 and VI11 Page 5 of 5

Benton
Subject: Benton
From: Linda Willis <Linda.WiIIis a ncmai1.net>
Date: Fri, 23 Jan 2009 09:42:32 -0500
To: Ken Pickle <ken.pickle a ncmail.net>
Ken,
I double checked the fisheries pna maps, they will not discharge to PNA. PNA waters
start south of Hwy 1?0 see attached map.
Linda Willis <llnda.Wlllis(a?ncniall.net>
Enviz-0nmental Engineer I
St:dace Water Ps-0=6011 Section
Division 01' Water Quality
Content -Type: application/pdf
map28.pdf
Content -Encoding: base64
1 0I.1 2/10/2009 2: 10 I'M

This map was produced for illustrative purposes as a general guide to
assist the public. Informational data used for this map were collected / �. ,;:. jL „' ,' ` r + r r\."e
from federal, state, county, and private organizations. While every
effort is made to keep this map accurate and up-to-date, it is not
intended to replace any official source. Under no circumstances shall the �r \V
State of North Carolina be liable for any actions taken or omissions made % YI
from reliance on any information contained herein from whatever source nor _ i' ` % l" `'
shall the State be liable for any other consequences from any such reliance. �,�� `'v}r" ^��,`y;
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Q inland waters (WRCjurisdiction) Map 28

Benton
Subject: Benton
From: Ken Pickle <ken.pickle cr ncmail.net>
Date: Tue, 10 Feb 2009 14:57:05 -0500
To: [e-mail]
ncmail.net
CC: Bethany Georgoulias <bethany.georgouIIas @nc mail. net>, Bradley Bennett
<[e-mail]>
Linda,
I've opened up Benton Ready -Mix and I'm reviewing it now. I've spoken with Don Covil
at Compass Pointe, and established first communication with him. I hope he quits
bothering you, and now starts bothering me. I apologize that you had to be in the
middle as a result of my delay. I'll keep you aware as I progress through the
submittal. My best hope is that I'll be finished this week, presuming that their
submittal is complete.
Don and Z discussed his general design approach, and I've alerted him that a single pH
sample value of 9.01 from a sister facility does not convince me that he has got PH
covered. We have seen pH reported by RRO in the 11 - 12 range for the drum wash.
I'll have a more specific opinion when I look closer at his design calcs.
Ken
Ken Pickle
DWQ Stormwater Permitting Unit
[phone]
[e-mail]
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.
) of 1 2/10/2009 2:58 I'M

Benton Concrete
Subject: Benton Concrete
From: "Don Covil" <dcovil.cpe [e atrnc.net>
Date: Tue, 10 Feb 2009 17:37:25 -0500
To: "ken Pickle" <Ken.Pickle a ncmai[.net>
CC: "michael Norton" <compasspointe a artmc.net>
Ken,
I just left you a voice mail and decided to follow up with email. Basically, I wanted to make two points
thinking they may have some bearing on your review.
,7°. I . We are not discharging directly to Williams Branch but to an unnamed tributary about 3,500'
rele✓d'`'upstream of its confluence with Williams Branch. This can be easily seen by viewing the aerials on
the Brunswick County GIS web site. If you like I'd be glad to email a pdf showing this.
2. The 22 mg/l (page 5 of the calcs.) represents the estimated TSS concentration of the effluent if all
particles greater than 10 microns settle out. The preceding calcs provide basis for estimating the
time for particles = to or > 10 microns settling out in 13.9 hours. 13.9 hours is equal to 41 % of the
total residence time of 34 hours (page 4 of calcs)_ "Intuitively" it would seem almost certain that in 34
hours there would be sufficient settling of pariticles less than 10 microns such that the TSS
concentration would be less than 20 ppm, d-I
Thanks,
Don'
Donald M. Covil, P.E.
Compass Pointe Engineering, PA
6934-6 Beach Drive. SIN
Ocean Isle Beach. NC 28469
[phone]
Donald M. Covil <dcovil.cpe(cuatnic.ner>
Compass Pointe Engineering, PA
/ 6- .i Rs r f
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1 of l 2/1 112009 7:50 AM

Facsimile transmittal
To: Don Covil, Compass Point Engineering
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT
AND NATURALRESOURCES-
DIVISION OF WATER QUALITY
FAX [phone]
Fax: [phone]
From: Ken Pickle, Stormwater Permitting Unit, Date: February 26, 2009
Division of water Quality
Phone: [phone] Pages: 7
E-mail: Ken. [e-mail]
Urgent For review Please comment (Per your request FYI, no action Please recycle
Subject: Copy COC NCG140387, Benton Ready -Mix of Brunswick
Don,
Again, I apologize for the delay on my desk, and for my failure to meet my promises.
Here's the COC for Benton Ready -Mix.
Please recall our conversations on a few points:
a) The general permit NCG14 sets a permit limit of 30mg/L TSS on the wastewater
discharge. However, Benton will discharge to a HQW water for which NC rule at 15A NCAC
2B .0224(b)(ii) requires that wastewater discharges be limited to 20 mg/L. I've
incorporated that extra restriction on the face of the COC, and I've notified the permittee of
that extra restriction in the transmittal letter.
b) We are seeing too many BMPs (wet detention basin) built way below design drawing
dimensions. Please alert your client that you have a responsibility to certify the
construction, and that DWQ will inspect this facility prior to its operation. We don't want
any embarrassments.
c) In consideration of the significant delay already on my desk, and despite not having
drawings in the final form, I've approved the submittal based on our conversation, and on
my expectation that you will revise the final drawings in order to: eliminate the spec to
encourage cattails; provide a hardened conveyance from the recycle bins overflow into the
southern Swale leading to the wet pond; identify for your client where his
monitoring/sampling point is located on the drawing.
d) Your engineering argument did not address the requirements to show pH compliance (a
single pH sample from a sister plant is not sufficient). However after subsequent
consideration, I've concluded that you're the PE, and you've presented the design in
response to the permit requirements. Please alert your client that his obligation is to meet
the permit discharge limits, and that any exceedence of those limits is a violation of the
permit.

_ Thanks for your patience. Please contact me if you have any comments or questions.
Ken

TRANSMISSION VERIFICATION REPORT
TIME
02/26/2009 15:05
NAME
WET AND SH2O BRANCH
FAX
9198076494
TEL
9198076300
SER.4
000EGJ796378
DATE,TIME 02/26 14:47
FAX ND./NAME 919105751214
DURATION 00:03:23
E
DARD
ECM
STATE OF NORTH CAPOLINA
DEPARTMENT OF ENVIRONMENT
AND NATURAL RESOURCES -
DIVISION OF WATER QUALITY
FAX [phone]
77­
F s irn i l'.�
To: Don Covil, Compass Point Engineering Fax: [phone]
From: Ken Pickle, Stormwater Permitting Unit, Date; February 26, 2009
Division of Water Quality
Phone: [phone] Pages: 7
E-mail- Ken,[e-mail]
Urgent For review Please comment
FYI, no action Please recycle
Subject: Copy COC NCG140387, Benton Ready -,Mix of Brunswick
Don,
Again, I apologize for the delay on my desk, and for my failure to meet my promises.
Here's the COC for Benton Ready -Mix.
Please recall our conversations on a few p6ints:
a) The general permit NCG14 sets a permit limit of 30mg/L TSS on the wastewater
discharge. However, Benton will discharge to a HQW water for which NC rule at 15A NCAC
2B .0224(b)(1i) requires that wastewater discharges be limited to 20 mg/L, I've
incorporated that extra restriction on the face of the COC, and I've notified the permittee of
that extra restriction in the transmittal letter,
4.l 1A/- - rc, 1i 4- ^ RMDC (mint- r1PtPntinn hacinl htfilt. wav hei6w design drawina

6934-6 Beach Drive, SW
Ocean Isle Beach, NC 28469
Mr. Bradley Bennett
Stormwater Permitting Unit, Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
RE: Benton Read -Mix of Brunswick, Inc.
Erosion Control Plan Submittal
Dear Mr. Bennett:
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Friday, October 24, 2008
Benton Read -Mix of Brunswick, Inc. (BRMB) plans to construct a ready -mix concrete plant on
an 8.5 acre tract of land just northeast of Shallotte in Brunswick County. The project will include
the construction of the concrete plant, driveway/parking, and accessory structures. Stormwater
runoff from all built -upon surfaces will be collected by vegetated swales and storm drainage
piping and directed to a wet detention pond.
A reclaim and washdown facility will provide treatment for the wastewater generated from
washing down mixers before they leave the site and from the process of reclaiming materials
from mixers returning to the site with excess concrete. Most of the wastewater will be recycled;
however, the means is provided to collect any overflow effluent and transport it via a vegetated
swale to an on -site stormwater detention pond.
We have enclosed the following documents in support of BRMB's request for coverage under
General Permit NCG 140000:
I. copy of the NPDES application for coverage under General Permit NCG 140000;
2. check in the amount of $100.00 to cover the application fee;
3. three copies of project plans;
4. one copy of "NPDES" calculations;
5. one copy of stormwater hydrology & hydraulic calculations;
6. copy of the Erosion and Sedimentation Control permit; and,
7. a county map showing the vicinity of the project site.
We trust that you will find our submittal complete; nonetheless, please call should you have any
questions or comments.
Sincerely,
Donald M. Covil, PE
Compass Pointe Engineering, PA
Enclosures
OCT 2 8 2008
BY:
cc: Mr. Keith Benton, Sr.
d. •
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RENTALS, LLC
10/17/2008 1506
NCDENR
Date Type Reference Original Amt. Balance Due Discount Payment
10/17/2008 Bill 100.00 100.00 100.00
Check Amount 100.00
Horry County State B100.00
a
11

Division of Water Quality / Surface Water Protection
NCDENRNational Pollutant Discharge Elimination System
tC..2r ,u I.*'tw1,rtL-a,
NCG140000
NOTICE OF INTENT
FOR AGENCY USE ONLY
Date Received
Year
Monlh
Da
Certificate of Cover9 e
N.LC LG I i 4
Check 0 Amount
Perrim Assigned w
National Pollutant Discharge Elimination System application for coverage under General Permit
NCG140000:
STORMWATER AND PROCESS WASTEWATER DISCHARGES associated with activities classified as:
SIC (Standard industrial Classification) Code - 3273 Ready Mixed Concrete
For new plant sites that will discharge or recycle process wastewater (even if commingled with
stormwater): This NOI is also an APPLICATION FOR Authorization to Construct (ATC)'wastewater
treatment facilities. ATC requests must be submitted at least 90 days prior to construction'.
For existingr plant sites discharging) or recycling process wastewater (even if commingled with
stormwater): This N01 Is also an APPLICATION FOR Authorization to continue to operate wastewater
treatment facilities in place. Construction, modification, or installation of any new treatment components
at an existing site requires an ATC_
Treatment facilities used to treat or recycle process wastewater (including stormwater SMP structures
treating process wastewater flows commingled with stormwater) require an ATC prior to construction
per 15A NCAC 2H .0138. The authorization to construct or continue to operate will be issued at the
same time as the Certificate of Coverage (COC) for the NCG14 permit. Design of treatment facilities
must comply with requirements of 15A NCAC 21-1.0138 & .0139.
Construction of wastewater treatment facilities (this includes recycle systems) at new or existing plant
sites requires submission of three (3) sets of plans and specifications signed and sealed by a
Professional Engineer (P.E.) or qualified statH2 along with this application. A copy of the design
calculations should be included. Please see questions 14 & 15.
lk-
For questions, please contact the DINO Regional Office for your area. (See page 5)
(Please print.or type)
1) Mailing address of ownerloperator (address to which all permit correspondence will be mailed):
Name h r.
Street Address E, 2.d - 0 "1 9
City C„ •L./aV State _,'Z_C-ZIPCode Zrj,(;28
Telephone No. E?U? or 23�L- 2.87Z Fax: AY{-- 234--g000
2) Location of facility producing discharge:
Facility Name
Facility Contact
Street Address
City
County
Telephone No.
1 State !�_ 4I1-uoae
2711 -2R77_ Fax:__. !i - 04
Page 1 of 5
As per 15A NCAC 2H .0106
ZUnless treatment facilities are designed, constructed, and put into operation by employees internal to the company who are qualified to
perform such work for their respective companies in accordance with General Statutes, 89C-2fi (7), plans and specifications must be signed
and sealed by a P.E.
SWO-229.071408 Last revised 7/14/08

NCG140000 N.O.I.
3) Physical location information:
Please provide a narrative description of how to get to the facility (use street names, state road numbers, and
distance and direction from a roadway intersection). F
ra,, +he ;L%f r. rG ,G t HE o
Of '0 " br V-o x O.-) m .jet _ T rr, le+4- a►. f i Qe4 PhJ -hr. ,J A 41. ;jr_ "{-n .S;fI- _
(A copy of a county map or USGS quad sheet with tacitity clearty located on the map is a required part n1 this application,)
4) Latitude -76o 2 / 4-3q _ N , Longitude 3V f y (deg, min, sec)
5) This NPDES Permit Application applies to which of the following:
21'�New or Proposed Facility Date operation is to begin
❑ Existing
6) Standard Industrial Classification:
Provide the 4 digit Standard Industrial Classification Code (SIC Code) that describes the primary industrial
activity at this facility
SIC Cade: ' 3 2- i 3
7) Provide a brief description of the types of industrial activities and products produced at this facility:
(include a site diagram showing the processareaspresent at this: facility.)
8) Discharge points! Receiving -waters:
How many discharge points (ditches, pipes, channels, etc.) convey stormwater and/or wastewater from the
property?
What is the name of the body or bodies of water (creek, stream, river, lake, etc.) that the facility stormwater.
and/or wastewater discharges end up in? t • ; rx4
If the site stormwater discharges to a separate storms wer system, name the operator of the separate storm
sewer system (e.g. City of Raleigh municipal storm sewer). wI C,
Receiving water classification (if -known): G ; S w 1•f Q 4ti �i5); f!E,�,.L r ., G%�
Note: Discharge of process wastewater to receiving waters classified as WS-fl-to W5-V or SA must
be approved by the N.C. Dept. of Environmental Health. if DEH does not -approve, coverage
under NCG140000 cannot be granted. No new discharges of process wastewater are
permitted in receiving waters classified as WS-1 or,freshwater ORW.
9) Does this facility have any other NPDES permits?
9?"No
❑ Yes
If yes, fist the permit numbers for all current NPDES permits for this facility:
10) Does this facility have any Non -Discharge permits (ex: recycle permits)?
�
i�' No
❑ Yes
It yes, list the permit numbers for all current Non -Discharge permits for this facility;
11) Does this facility employ any best management practices for stormwater control?
❑ No
& Yes
If yes, please briefly describe: .r-f_0 r-'N'0 w4c r c.4-
Page 2 of 5
SWU-229-071408 Last revised 7/14/2008

NCG1 40000 N.O.I.
12) Does this facility have a Stoimwater Pollution Prevention Plan?
Lh No
❑ Yes
If yes, when was it implemented?
13) Are vehicle maintenance activities occurring or planned at this facility?
No
eyes
Wastewater Treatment Design Information
14) Are discharges occurring or planned from any of the following process wastewater generating activities?
Vehicle and equipment cleaning R"'YeS ❑ No
Wetting of raw material stockpiles O'Yes ❑ No
Mixing drum cleaning Yes ❑ No
If yes to any of the above, please describe the type of process used to treat and/or recycle the process
wastewater.
For a sufficient application, you must provide design specifics (e.g., design volume, retention time, surface
area, etc.) and calculations to demonstrate compliance with permit effluent limits (pH — 6-9 SU, Total
Suspended Solids (TSS) -- 30 mgll, and Settleable Solids (SS) — 5 ml/l.) (Use separate sheet(s)].
If all these discharges are recycled, please refer to Question 15.
For plants that recycle and/or dischar a process wastewater:
When applying for this permit, you are also applying for an authorization to construct (new
treatment facilities) or authorization to continue to operate (existing treatment facilities). as
part - :of the NOi. For new sites, you must -submit three (3) sets of design plans and
specifications with this application and provide supporting- calculations that predict.
compliance of final discharge with permit limits. For existing sites, applicants should submit
three (3) sets of plans and specs for facilities as -built and provide as many design details as
possible, or submit a detailed diagram of treatment systems in place that includes information
such as tank volumes, dimensions, retention time, piping, settling basin details, etc.
Please note: if new treatment systems are planned for an existing site, an ATC will be required
prior to construction of those facilities. Plans/specs/calculations prepared by a P.E, and the
request for an ATC may be submitted with this NOI, or separately at a later date. DWO may
request the status of your plans for requesting an ATC upon issuance of the COC.
15) Does the facility use or plan to use a recycle system?
❑ No
Ga*"Yes
If yes, what size storm event is the system designed to hold before overflowing? (for example, 10-yr, 24-hr)
a C, year, 24-hr rainfall event
For a recycle system (regardless of when it overflows), please provide plans, calculations, and design
specifics (e.g., throughput assumptions/water baiance, design.volume, retention time, surface area, amount of
freeboard in design storm event, etc.). (Use separate sheet(s)].
For a sufficient application,.the.inforT,ation.must•demonstrate.complianc:e of final discharge with perm/r,
effluent limit pN — 6-9 SU, Total Solids (TSS)— 30 mgll, and Settleable Solids (SS)�' 5�
must demonsirate_ihat-the-recycle system has suffictent capacity to contain runoff"from-a-25-year, 24-hr;.
rainfall event plus one foot of freeboard under design operating conditions.
Page 3 of 5
SWU-229-071408 Last revised 7/14/2008

NCG140000 N.O.I.
16) Are wastewater treatment facilities (including recycle systems) planned in the 100-year flood plain?
VNo ❑ Yes If so, include information to demonstrate protection from flooding: (Minimum design
requirements for treatment works include protection -from the 100-year flood, per 15A NCAC 2H .0219.)
17) Hazardous Waste:
a) Is this facility a Hazardous Waste Treatment, Storage, or Disposal Facility?
R'No
❑ Yes
b) is this facility a Small Quantity Generator (less than 1000 kg. of hazardous waste generated per month) of
hazgdous waste?
92'No
❑ Yes
c) Is this facility a large Quantity Generator (100D kg, or more of hazardous waste generated per month) of
h�az�aus waste?
Gd`No
0 Yes
d) If you answered yes to questions b. or c., please provide the following information:
Type(s) of waste:
How is material stored:
_Where is material stored:
How many disposal shipments per year:
'Name of transport / disposal vendor; _
Vendor address:
18) Certification:,
North Carolina General Statute 143-215.6 B(i) provides that:
Any person who knowingly makes any false statement, representation, or certification in any application, record, report, plan, or other
document filed or required to be maintained under this Article or a rule implementing this Article; or who knowingly makes a false
statement of a material fact in a rulemaking proceeding or contested case under this Articie; or who falsities, tampers with, or knowingiy
renders inaccurate any recording or monitoring device or method required to be operated or maintained under this Article or rules of the
(Environmental Managementl Commission implementing.fts Article shall be guilty of a Dais 2 misdemeanor which may include a fine
not to exceed ten thousand dollars ($10,000)_
hereby request coverage under the referenced General Permit. I understand that coverage under this permit
will constitute the permit requirements for the discharge(s) and is enforceable in the same manner as an
individual permit.
I certify that I am familiar with the information contained in this application and that to the best of my
knowledge and belief such information is true, complete, and accurate.
Printed Name of Person Signing., "NA A A. 12e a Qr, r
Title: �C7 n,.<
of Applicant)
_10-17-48
(Date Signed)
Notice of Intent must be accompanied by a check or money order for $100.00 made payable to:
NCDENR
Page 4 of 5
SWU-229-071408 Last revised 7/14/2008

NCG140000 N.O.E.
Final Checklist
This application will be returned as incomplete unless all of the following items have been included:
&r"'. Check for $100 made payable to NGDENR.
5;K This completed application and all supporting documentation (including design details and calculations for
treatment systems).
1P L>3 If an Erosion & Sedimentation Control (E&SC) Plan is required from Division of Land Resources (t7LR)
or local designee: documentation verifying applicant has developed and submitted that Plan to the governing
agency (required per 15A NCAC 02H .0138).
For new sites (or sites that will install new treatment facilities). Three (3) copies of plans and
specifications for wastewater treatment facilities (including recycle systems), signed and sealed by a
Professional Engineer or qualified staff meeting requirements of G.S. 89C-25 (7).
'Ka ❑ For existing sites: three (3) copies of plans and specifications for' wastewater treatment facilities (including
recycle systems) as built, stamped and sealed by a Professional Engineer, or (only if plans not available) a
detailed diagram of treatment systems in place that includes information such as tank volumes, dimensions,
retention time, piping, settling basin details, etc.
A site map showing, at a minimum, (existing or'proposed):
(a) outline of drainage areas, (b) stormwaterlwastewater treatment structures, (c) location of
stormwaterlwastewater outf ails (corresponding to which drainage areas), (d) runoff conveyance structures,
(e) areas where materials are stored, (f) impervious areas, and (9) site property lines.
l A county map or i.lSGS quad sheet with location of facility clearly marked.
Mail the entire package to:
Stormwater Permitting Unit
Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Note
The submission of this document does not guarantee the issuance of an NPDES permit -
For questions, please can fact the DWQ Regional Office for your area.
DWG Regional Office Contact Information:
Asheville Office ...... [phone]
Fayetteville Office ...
[phone]
Mooresville Office...
[phone]
Raleigh Office ........
[phone]
Washington Office ...(252)
946-6481
Wilmington Office ...
[phone]
Winston-Salem ......
[phone]
,Central Office .........[phone]
Page 5 of 5
SWU-229.071408 Last revised 7/14/2008

BENTON READY -MIX OF BRUNSICK, INC.
Shallotte,_North Carolina
Notes and Calculations Supporting Application for
General Permit No. NCG 140000 to Discharge Stormwater
Under the National Pollutant Discharge Elimination System
October 2008
Compass Pointe Engineering,. PA
Ocean Isle Beach, North Carolina

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O F 4' WEIR WALL .@ 44.5' ! TOf
! 40.5'
BOTTOM ELEV. @ 40.5' --X p --o- RAMP DOWN
I A
m� I
l
1/40.5'
4 - RAMP DOWN
!
. I
G'
1 4' WEIR WALL '@ 44.5'
WEIR WALL @ 443 1 40.5'
PUMP BOTTOM ELEV. @ 40.5' -/4' I RAMP DOWN
CHAMBER_ TOP Of WALL @ 4G'.5' I
C/L
C B C
GOVERFLOW WEIR WALL @ 45.5' 74'
4' WEIR WALL @ 44.5'
,,0(-- BOTTOM ELEV. @ 40.5-
141
PLAN VIEW
5CALE: I " = 1 0'
TOP OF WEIR
WALL @ 44.5'
TlIG i'1C 71/Al l /1 A/` �1
TO
I
-TO[
1
I TOP OF
APRON @ 4(
n(F\

ENVIRONMENTAL SYSTEMS TESTING SERVICES
6QU Highway 544
Y.� Y -
I'hunc 9,13.347-7698 Post Office Box Ibl y
Fax F,43-347-6 73'2 C*n aY, South Carolina 29528
CLIENT Benton Concrete & Utilities DATE August 18, 2008
309 Highway 544
Conway, SC 29526 ORDERED BY Keith A. Benton
CERTIFICATE OF ANALYSIS
South Carolina Certification # 26101
North Carolina Certification # 45708Gfi�9'"5
SAMPLE TYPE Stormwater
ANALYSIS REQUIRED As Indicated
SAMPLE ID Discharge Pipe
COLLECTEDIDE LIVERED BY Kenneth Huggins on 815108
SAMPLE LOCH NS
Discharge
GI l8rge
Endof
Discharge
PARAMETER
Method Code
Analysis
Date /Time
Pipe @Into
(13F
pe @
Pond
PipeReclaimer
um �
Holding Pond
815/u8 @
H
' SM 4500 HS
1345 b ..KFW
12-07 SU
9.90 SIJ
8,96 SU
9.02 SU
Total
Suspended
8/6108 @
Solids
I SM 2540 D
1510 by VCM
154.8 m /L
172.8 m /L
17A m /L
26-0 mg1L
`Settleable
8110106 @
Solids ..
MCAVVW 1 60. 5
1000 by DW
2.0. mLIL
5.0 mLIL
0.30 mUL
0.20 mUL
Collection
Time
1100
1105
I 1110
1115
COMMENTS: 'Analysis done by TestAmerica Laboratories, Inc., 5102 LaRoche Avenue, Savannah, GA 31404.
Respectfully Submitted by:
Kellah . Webster v
i
Envircniinental SvTesting Services, LLC J S
t�

THEMIP'
5°1�t 77E`F� y ail 5fL'd:';� l�1'r'?QPf �)Jf�tii'
2210 Technology Drive, PO Box 724
Schenectady, NY 12301
Phone 518-382-DO82
Fax [phone]
481 Garlington Road, Suite 1
�j Greenville, SC 29615
��141 u Phone [phone]
L� Fax [phone]
Net: www.the-mandp•lab.com
REPORT Email: [e-mail]
LAB No.: 08775 DATE REP.. September 11, 2008
DATE RECEIVED: August 27, 2008
REQUESTED BY: Kellah Webster
COMPANY: Environmental Systems Testing Services, Lt_C
ADDRESS: 600 Highway 544
PO Box 1615
Conway SC 29528
PURCHASE ORDER No.: 09 15 08
CUSTOMER REQUEST No.: Benton Concrete
DESCRIPTION OF WORK REQUESTED:
Two liquid samples containing concrete sediment were received for particle analysis. The samples are identified
as 845859 Discharge Pipe Into Reclaimer and 845860 Discharge Pipe at Pump.
WORK LOCATION:
Schenectady
Sample Disposition: Sample(s) consumed during testing
Reviewer:�v''h a-�D�-� Author:
Dry Beth Bolduc .Jos ph Foroughi
Digitally signed on: 09/11/2008 8:50 Digitally signed on: 09/1ol2008 8:55
1 HEREBY CERTIFY THAT THE DATA CONTAINED IN THIS REPORT HAVE BEEN GENERATED IN ACCORDANCE WITH AND MEEF THE REQUIREMENTS OF THE ABOVE PURCHASE
ORDER
Shirley Stficklan��
Quality Assurance Administrator
Page i o1 2 Digitally signed on: 09/11/2008 12:26

THE MfP LRB Page 2 of 2 08775
Kellah Webster
The samples, 08775-1 845859 Discharge Pipe Into Reclairner, and 08775-2
845860 -iGm-Ia-ari,qi-u Pipe At , were separately poured into a stack of sieves that had been
cleaned, dried and weighed. Each was rinsed and agitated with three 50-mL aliquots of
deionized water. The retained particles were dried in the sieves in an oven at 105 "C. The
sieves were cooled in a desiccator and reweighed. The weights of the particles in each sieve
were calculated and recorded. Table 1 below shows the resulting fractionation of the particles
by size. Figure 1 is a chart of the results.
TABLE 1 1
PARTICLE SIZE FRACTIONATION BY WEIGHT �
Particle Size
microns
08775-1
% b wei hg t V
087r75-2
% by weight
>250
41.1
22.9
250 - 106
14.3 .
21.7
106 - 75
7.6
3.4
75 : 53
4.7
2.1
53 - 38
4.3
3.7
<38
28.1
46.2
L1m
50.0
45.0
40.0
I
i 35.0
d 30.0
a 25.0
t
2m 20.0
15.0
10.0
5.0
E >250 250 - 106 106 - 75 75 - 53 53 - 38 <38
Particle Size (microns)
Figure 1
Chart of the data in Table 1.
I
i
i
4
,I
i lg 08775-1 % by weighE ;
n 08775-2 % by weight
2210 Technology Drive, PO Box 724, Schenectady, NY 12301 481 Gariington Road, Suite L, Greenville, SC 29615

10
. NR = 2,000
1
. _. NR = 1,000
6NR=
0.1 1QQ
_... NR=10.
a
a� 0.01
NR= 1
A
0.0Q1 A Specific gravity = 2.65
Sphericity = 1.00
B
B Specific gravity = 2.65
Sphericity = 0"115
C C Specific gravity =1.30
0.0001
}: Sphericity = 1.00
f
' D Specific gravity = 1.05
D Sphericity = 1.00
0.00001
0T' 0..1 1 10 100
`r Particle diameter, mm
Wa skew ester �o
_ :
Engineering _ f
Treatment and Reuse
I Fourth Edition'.
Metcalf & Eddy, Inc.
..
Radwd by
(3a - Tdr4a.691—
P'd—E riavt f O'A . . L ..
UMwrih ofGGlmwa Cat _ .
- Franklin L Burton
is Ah.�G+uaoi.
#t. 00%ew sft—1
Pouwnt CiAl 1, e.,—w
UZ—F f .hift-, S.uk
• B'atm Belt atl7�. h GNWM. W IMC-
S . Ul L. MN 8+9 "Y Crest �+ 0l
LR6IX� Lpr. MWt1 M®CAp Mtit M�t�M W.O�
&-.0 SSW 9� sydw 4- ft—

f f `r
RAHIS ET AL. ON ASTM HOUND ROBIN STUDIES 5
-FABLE I-Routstrap darafor LAS-W (after exchiding untlic)s). ,4i_e rejigs to equivalent spheriralId -title diameter.
- - --PM Only SMOnly PM+SM
Size I Ernll Mean Low High Meat Low High Mean Law High
1
5.0
3.5
6.3
6.0
3.9
8.3 5.4
4.2
6.7
1.5
7.9
6.4
9.5
9.5
T 2
12.1 8.7
7.2
10.0
2
11.1
9.6
12.5
13.7
11.6
15.9 12.2
/�}10.9
13.5
3
16.3
14.8
17.8
19.0
16,7
21.3 17.5
16.2
19.0
4
20.5
19.0
22.1
23,4
21.1
25.7 21.8
20.4
23.2
6
27.9
26.5
29A
30.7
28.3
33.3 29.1
27.7
30.6
8
34.1-
32.9
35.5
37.3
34.9
39.7 35.5 �l'
10 )A b" 47.2
34.1
' 45.4
37.0
12
16
45.8
54.7
43.9
52.7
47.8
56.6
49.0
58.0
45.7
55.0
52.1
61.2 56.2 54.2
49.1
57.9
24
699.7
6&0
71.6
72.5
69.8
75.1 09.5
72.6
32
80.4
78.8
82.1
83.4
81.3
85.3 81.7 Q 80.3
811
48
92.6
91.5
93.7
94.3
93.0
95.5 28)4 93.4 P ' 92.5
94.2
64
97.1
96.4
97.9
98.3
97.5
98.9 97.6 97.1
98.1
96
99.4
99.0
99.7
99.7
99.5
99.9 99.6 99.3
99.8
/
128
99.9
99.7
100.0
100.0
99.9
100.0 99.9 99.8
100.0
?.',.r::t-s
`'i`
4'L,a.•, 3 �r..47
1J^Fof ...L lcCr 4-L.cn fD�A.
TABLE 2-Bootstrap data for LAS-D for PM (after eacluding vtidierr). 3i�e refers to equivalent spherical particle diameter.
PM Only ( SM Only ) PM+SM
Size (Wnl Mean � C High Mean��^High Mean Low High
1
5.0
2.7
7.3
4.4
2.6
6.2
4.7
3.3
6.1
1.5
7.9
4.5
10.9
6.7
3.9
9.2
73
5.4
9.5
2
12.3
10.2
14.5
11.9
10-3
13.3
12.1
10.6
13A
3
18A
15.5
20.6
17.2
15.4
19.3
17.7
16.1
19.3
4
23.0
20.2
26.0
21.5
19.3
23.6
22.3
20.3
24.7
6
30.9
27.6
34.4
28.7
26.0
30.8
29.9
27.8
32.0
8
37.1
33.9
40.5
34.7
32.1
36.7
35.9
33.9
38.1
12
473
44.0
50.7
453
43.2
47.3
46A.
44A
49A
16
55.3
52.2
38.4
53.7
52.0
55.4
54.6
52.8
56.7
24
68.9
65.9
71.6
67.9
66.7
69.3
68.4
66.9
70.1
32
78.8
76.4
81.2
79.6
77.6
79.7
78.7
77.3
80.2
48
90.7
88.7
92.6
91.5
90-4
92.7
91.1
89.9
92.2
64
95.9
94.2
97.5
96.7
95.9
97.7
96.3
95.3
97.3
96
98.7
97.5
99.7
99,5
99.2
99.8
99.1
98.3
99.6
128
99.1
97.9
99.9
99.9
99.8
100.0
99.5
98.8
100.0
100
90
80
70
60
m 50
40
tj 30
20
10
0
-r- PM
-af- S M
-� PM+SM
0
m
E
c>
100
90
BO
70
60
50
40
30
20
10
0
1 10 iCa •1 10 100
Size [Jim] Size [mm]
FIG. t-Graphical comparison of the Bootstrap mean car ves obtained RG_ 2-Graphived comparison of the Roorsrrap mean Curves obtained
in Table 1 (IAS-W)• ror cladtp, the ronfrdenre inrervals an, nut .shorn in Table 2 (I.AS-D)• For clufi }y, the runfidence imer vals are not shOW)r here,
here. bur can be fotind in Table 1. but can be found in Table 2.
Copyright by ASTM Int'I (all rights reserved):
Reproduction authorized per License Agreement with CHIARA F FERRARIS (MIST - 13FRL): Tue Nov 30 1 1;31:29 EST 2004

Measurement of Particle Size Distribution in Portland Cement
Powder: Analysis of ASTM Round Robin. Studies
by
Chiara F. Ferraris
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899 USA
Vincent Hackley
Materials Science and Engineering Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899 USA
and
Ana Ivelisse Aviles
Information Technology Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899 USA
Reprinted from Cement, Concrete and Aggregates, Vol. 26, No. 2, 2004.
NOTE: This paper is a contribution of the National Institute of Standards and
Technology and is not subject to copyright.
NLST
NaiianaI Institute of Standards and Tethnology
Technology Fdminisliu%ion, U.S. Oeportmenl of Cornmoice

Page l of 1
Don Coviil
From: "Keith Benton" <[e-mail]->
To: <[e-mail]> C`
Sent: Monday, October 13, 2008 9:11 AM
Subject: Brunswick Ready Mix
Don,
It takes about eight minutes to discharge a cubic yard of concrete. Normally we would only have one
yard }/- to reclaim. Total time on the rack would be fifteen minutes. The pump came with the reclaim system and
runs off its power.The horsepower does not exceed three.The pipe size is two from the pump to the reclaimer-
hope that helps you. Any other questions let me know. KEITH
x
10/ 13/2008

page 1 of t
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http://w«nv.2mco.com/catalog;/2m/berkelylb2tpm.htm 9/3/2008

PROJECT Benton
DESIGNER QILCOVII
FORCE MAIN
Type Fipj
SCH40-PVC
Nominal PIRq Size (in.)
2
Actual Po-S Size (Ln.)I
2.07
Pipe Length
100
Elev. LlpsjLq�am
40,5
Elev. Dqvns
60
HWCoaf.
120
# of Bends
a
# of Gate Valves
2
#of Swing Checks
of Globe Valves
0
DATE I Qfl 3"2008
Minor Loss Coefficients
bend gate valve Fawing checkj globe
0A 0.21 2.5 10
Friction Head (ft) Static Head
FIDwrale (gpm) L Velocity "ps'-, TDH (ft.)
Pipe Minor Total
0 0.0 0,0 0.0 0.0 20 20
25 1.7 0.5 i 2.2 20 22
50 4.6 6.0 1 2.1 1 8.1 20 28
75 3 20 37
100 1 9.5 E 21.6 8.2 I 29.8 20 49_
125 11.9 32.7 12.9 45.5 20
150 14.3 45.8 I 118.5 64.3 20 84
175 16.7 60.9 25.2 �- 56.1 2 06
200 1911 77.9 32.9 i 110.9 20 130
225 21.6 96.9 41.7 138,6 20 158
PUMP DISCHARGE PIPING
GIVEN
SCH40 PVC.
Nominal Pipe Size �(i19-
2
Actual Pipe Size JLnj
2.07
Pipe Lengtq(ft-)_
10
EleVL Up
0----
Elev. Downstream 11.)
HM Coef.
120
# of Bends
4
# of Gate Valves
i
# of Swing Checks
i
I# of Globe Valves
f 0
"TOTAL" TDH (ft.)
Velocity (fps)
Friction
Head (ft.)
Pie
minor Total
0.0 0.0
0.0 0'0
0.6 I 0.7
20
-.30.
4
60
82
139
..174.
213
2.2
5.0 Tl-6.3
2.8
7.2
S. 5 2.2
8.9
11.1
11.9 3.3
14.3 -4.6
1f),7 6-1
7.B
21.5 9.7
13,9
17.2
20.1
27.3
35.7
45,2
24.6__
33.4
435
54.9
Compass Pointe Engineering, P.A.
Ocean Isle Beach, NC
a

r
0;A
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Land Resources
Land Quality Section
Jaynes D. Simons, PG, PE Michael F, Easley, Governor
Director and State Geologist William G. Ross, Jr., Secretary
October 10, 2008
LETTER OF APPROVAL WITH MODIFICATIONS AND :PERFORMANCE
RESERVATIONS
Benton Rentals U, LLC
ATTN :- Keith A Benton
Post Office Box 797
Conway, SC 29528
RE: Project Name: Benton Ready -Mix of Brunswick, Inc. - EXPRESS
Project ID: Bruns-2009-034 Acres Approved: 8,00
County: Brunswick,' 197 Barnhill Road, NW, Shallotte
River Basin: Lumber Stream Classification: HQW
Submitted By: Donald M Covil, Compass Pointe Engineering, PA
Date Received by LQS: October 8, 2008
Plan Type: New
Dear Mr. Benton:
This office has reviewed the subject erosion and sedimentation control plan and hereby issues this
Letter of Approval with Modifications and Performance Reservations. A list of the modifications
and reservations is attached. This plan approval shall expire three (3) years following the'date of
approval, if no land -disturbing activity has been undertaken, as is required by Title 15A NCAC 4B
.0129. Should the plan not perform adequately, a re-%ised plan will be required (G.S. 113A-54.1)(b).
Please be advised that Title 15A NCAC 4B .0118(a) requires that a copy of the approved erosion
control plan be on file at the job site. Also, you should consider this letter to give the Notice
required by G.S_ 113A-61.l(a) of our right of periodic inspection to ensure compliance with the
approved plan.
North Carolina's„ Sedimentation Pollution Control Program is performance -oriented, requiring
protection ofexisting natural resources and adjoining properties. If, following the commencement
of this project, it is determined that the erasion and sedimentation control plan is inadequate to meet
the requirements of the Sedimentation Pollution Control Act of 1973 (North Carolina General
Statute 1 13A-51 thru 66), this office may require revisions to the plan and implementation of the
revisions to insure compliance with the Act.
Wilmington Regional Office
127 Cardinal Drive Extension, Wilmington, North Carolina 28405 Phone:[phone] Fax [phone]

Letter of Approval with Modifications and Performance Reservations
Project :- Benton Ready -Mix of Brunswick, Inc.
October 10, 2008
Page 2 of 4
Acceptance and approval of this plan is conditioned upon your compliance with Federal and State
water quality laius, regulation's, and rules. In addition, local city or county ordinances or rules may
also apply to this land -disturbing activity. This approval does not supersede any other permit or
approval.
Please be aware that your project will be covered by the enclosed NPDES General Siormwater
Permit NCGO 10000 (Construction Activities). You should first become familiar with all of the
requirements for compliance with the enclosed general permit.
Please note that this approval is based in part on the accuracy of the information provided in the
Financial Responsibility Form, which you have provided. You are requested to file an amended
form if there is any change in the information included on the form. In addition, it would be helpful
if you notify this office of the proposed starting date for this project. Please notify us if you plan to
have a preconstruction conference.
Your cooperation is appreciated.
Sincerely,
t
Rhonda Hall
Assistant Regional Engineer
Land Quality Section
Enclosures: Certificate of Approval
Modifications and Performance Reservations
NPDES Permit
cc: Donald M Cavil, PE, Compass Pointe Engineering, PA

Letter of Approval with Modifications and Perfonnance Reseivations
Project:- Benton Ready -Mix of Brunswick, Inc.
October 10, 2008
Page 3 of 4
MODIFICATIONS AND PERFORMANCE RESERVATIONS
Project Name: 'Benton Ready -Mix of Brunswick, Inc.
Project ID: Bruns-2009-034
County: Brunswick
1. This plan approval shall expire three (3) years following the date of approval, if no land
disturbing activity has been undertaken, as is required by Title 15A NCAC 4B.0029.
2. The developer is responsible for the control of sediment on -site. If the approved erosion
and sedimentation control measures prove insufficient, the developer must take those
additional steps necessary to stop sediment from leaving this site. Each sediment storage
device must be inspected after each storm event. Maintenance and/or clean out is
necessary anytime the device is at 50% capacity.
3. Any and all existing ditches on this project site are assumed to be left undisturbed by the
proposed development unless otherwise noted. The removal of vegetation within any
existing ditch or channel is prohibited unless the ditch or channel is to be regarded with side
slopes of 2 horizontal to 1 vertical or less steep. Bank slopes may be mowed, but stripping
of vegetation is considered new earth work and is subject to the same erosion control
requirements as new ditches.
4. The developer is responsible for obtaining any and all permits and approvals necessary for
the development of this project prior to the commencement of this land disturbing activity.
This could include agencies such as the Division of Water Quality,�s stormwater regulations,
their enforcement requirements within Section 401 of the Clean Water Act, the U.S. Army
Corps of Engineers jurisdiction of Section 404 of the Clean Water Act, the Division of
Coastal Management6s CAMA requirements, the Division of Solid Waste Managements s
landfill regulations, the Environmental Protection Agency and/or The U.S. Army Corps of
Engineers jurisdiction of the Clean Water Act, local County or Municipalities, ordinances, or
others that may be required. This approval cannot supersede any other permit or approval;
however, in the case of a Cease and Desist Order from the Corps of Engineers, that Order
would only apply to wetland areas. All highland would still have to be in compliance with the
N.C. Sedimentation Pollution Control Act.
5. if any area on site falls within the jurisdiction of Section 401 or 404 of the Clean Water Act,
the developer is responsible for compliance with the requirements of the Division of Water
Quality, the Corps of Engineers and the Environmental Protection Agency (EPA)
respectively. Any erosion control measures that fall within jurisdictional wetland areas must
be approved by the aforementioned agencies prior to installation. The Land Quality Section
must be notified of a relocation of the measures in question to the transition point between
the wetlands and the uplands to assure that the migration of sediment will not occur. If that
relocation presents a problem or contradicts any requirements of either DWQ, the Corps, or
the EPA, it is the responsibility of the developer to inform the Lbnd Quality Section regional
office so that an adequate contingency plan can be made to assure sufficient erosion control
remains on site. Failure to do so will be considered a violation of this approval.

Letter of Approval with Modifications and Performance Reservations
Project :- Benton Ready -Mix of Brunswick, Inc_
October 10, 2008
Page 4 of 4
MODIFICATIONS AND PERFORMANCE RESERVATION'S
Project Name: Benton Ready -Mix of Brunswick, Inc.
Project ID: Bruns-2009-034
County: Brunswick
6. Any borrow material brought onto this site must be from a legally operated mine or other
approved source. Any soil waste that leaves this site can be transported to a permitted
mine or separately permitted construction sites without additional permits. Disposal at any
other location would have to be included as a permit revision for this approval.
7. This permit allows for a land disturbance, as called for on the application plan, not to
exceed 8.0 acres. Exceeding that acreage will be a violation of this'permit and would
require a revised plan and additional application fee. Any addition in impervious surface,
over that already noted on the approved plan, would also require a revised plan to verify the
appropriateness of the erosion control measures and stormwater retention measures.
8. The construction detail for the proposed silt fence requires reinforcing wire and steel posts a
maximum.of eight (8) feet apart. Omission of the reinforcing wire is a construction change
that necessitates more posts for support, i.e., the spacing distance needs to be reduced to
no greater than six (6) feet apart.
9. Because the Sediment traps and basins are shown on the plan as the primary
sedimentation and erosion control devices on this project, it is necessary that the traps and
basins and their collection systems be installed before any other grading takes place on
site. If that proves to be impractical, a revised plan must be submitted and approved that
addresses erosion and sediment control needs during the interim period until the traps and
basins are fully functioning.
10. A graveled construction entrance must be located at each point of access and egress
available to construction vehicles during the grading and construction phases of this project_
Access and egress from the project site at a point without a graveled entrance will be
considered a violation of this approval. Routine maintenance of the entrances is critical.
11. The North Carolina Sedimentation Pollution Control Act mandates a shortened time frame
in which to re-establish vegetative groundcover. Slopes (including cuts, fills, and ditch
banks) left exposed will, within 21 calendar days after completion of any phase of grading,
be planted or otherwise provided with groundcover sufficient to permanently restrain
erosion.

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Permit No. NCG140000
(b) Secondary Containment Requirements and Records. Secondary containment is required
for: bulk storage of liquid materials, storage in any amount of Section 313 of Title III of the
Superfund Amendments and Reauthorization Act (SARA) water priority chemicals, and storage
in any amount of hazardous substances, in order to prevent leaks and spills from contaminating
stormwater runoff. A table or summary of all such tanks and stored materials and their
associated secondary containment areas shall be maintained. if the secondary containment
devices are connected to stormwater conveyance systems, the connection shall be controlled by
manually activated valves or other similar devices (which shall be secured closed with a locking
mechanism), and any stormwater that accumulates in the containment area shall be at a
minimum visually observed for color, foam, outfall staining, visible sheens and dry weather flow,
prior to release of the accumulated stormwater. Accumulated stormwater shall be released if
found to be uncontaminated by any material. Records documenting the individual making the
observation, the description of the accumulated stormwater, and the date and time of the
release shall be kept for a period of five years.
(c) BMP Summary. A listing of site structural and non-structural Best Management Practices
(BMP) shall be provided. The installation and implementation of BMPs shall be based on the
assessment of the potential for sources to contribute significant quantities of pollutants to
stormwater discharges and data collected through monitoring of stormwater discharges. The
BMP Summary shall include a written record of the specific rationale for installation and
implementation of the selected site BMPs. The BMP Summary shall be reviewed and updated
annually.
Spill Prevention and Response Plan. The Spill Prevention and Response Plan (SPRP) shall
incorporate an assessment of potential pollutant sources based on a materials inventory of the
facility. Facility personnel (or the team) responsible for implementing the SPRP shall be
identified in a written list incorporated into the SPRP, and signed and dated by each individual
acknowledging their responsibilities. A responsible person shall be on site at all times during
facility operations that have the potential to contaminate stormwater runoff through spills or
exposure of materials associated with the facility operations. The SPRP must be site stormwater
specific. Therefore, an oil Spill Prevention Control and Countermeasure plan (SPCC) may be a
component of the SPRP, but may not be sufficient to completely address the stormwater aspects
of the SPRP. The common elements of the SPCC with the SPRP may be incorporated by
reference into the SPRP.
4. Preventative Maintenance and Good Housekeeping Program. A preventative maintenance and
good housekeeping program shall be developed and implemented. The program shall list all
stormwater control systems, stormwater discharge outfalls, all on -site and adjacent surface
waters and wetlands, industrial activity areas (including material storage areas, material
handling areas, disposal areas, process areas, cement crushing areas, loading and unloading
areas, ash storage areas, and haul roads), all drainage features and structures, and existing
structural BMPs. The program shall address and maintain a record of the handling and storage
of fly ash, ash by-products, and recycled materials. The program shall establish schedules of
inspections, maintenance, and housekeeping activities of stormwater control systems, as well as
facility equipment, facility areas, and facility systems that present a potential for stormwater
exposure or stormwater pollution. Inspection of material handling areas and regular cleaning
schedules of these areas shall be incorporated into the program. Timely compliance with the
established schedules for inspections, maintenance, and housekeeping shall be recorded in
writing and maintained in the SPPP. All such inspections must be documented with printed
name, date and signature of the individual performing the inspection(s).
5. Employee Training. Training programs shall be developed and training provided at least once a
year for facility personnel with responsibilities for: spill response and cleanup, preventative
maintenance activities, and for any of the facility's operations that have the potential to
contaminate stormwater runoff. Facility personnel (or team) responsible for implementing the
Part III Page 2 of 3

Permit No. NCG140000
training shall be identified, and the annual training shall be documented by the signature of each
employee that participates.
Responsible Party, The Stormwater Pollution Prevention Plan shall identify a specific
position(s) responsible for the overall coordination, development, implementation, and revision
to the SPPP. Responsibilities for all components of the SPPP shall be documented and position
assignments provided. See signatory requirements in Part V Section B.5 of permit.
Plan Amendment. The permittee shall amend the SPPP whenever there is a change in design,
construction, operation, or maintenance which has a significant effect on the potential for the
discharge of pollutants to surface waters. All aspects of the Stormwater Pollution
Prevention Plan shall be reviewed and updated on an annual basis. The annual update shall
include an updated list of significant spills or leaks of pollutants for the previous three years, or
the notation that no spills have occurred. The annual update shall include written re-
certification that the stormwater outfalls have been evaluated for the presence of non-
stormwater discharges. Each annual update shall include a documented re-evaluation of the
effectiveness of the BMPs listed in the BMP Summary of the Stormwater Management Plan. The
annual update shall be documented with the printed name, date and signature of the individual
performing the review, as well as a detailed description of the changes necessary to keep the
SPPP updated.
The Director may notify the permittee when the SPPP does not meet one or more of the
minimum requirements of the permit. Within 30 days of such notice, the permittee shall submit
a time schedule to the Director for modifying the SPPP to meet minimum requirements. The
permittee shall provide certification in writing (in accordance with Part V, Standard Conditions,
Section B, Paragraph 5) to the Director that the changes have been made.
Facility Inspections. Inspections of the facility and all stormwater systems shall occur as part of
the Preventative Maintenance and Good Housekeeping Program at a minimum on a semi-annual
schedule, according to the schedule in Table 2. These inspections shall have at least 30 days
separating inspection dates, unless inspections are required more frequently by DWQ as part of
the Tiered Response. These facility inspections are different from, and in addition to, the
stormwater discharge characteristic monitoring required in Part IV of this permit.
10. Implementation. The permittee shall implement the Stormwater Pollution Prevention Plan.
Implementation of the SPPP shall include documentation of all monitoring, measurements,
inspections, maintenance activities, and training provided to employees, including the log of the
sampling data and of actions taken to implement BMPs associated with the industrial activities,
and including vehicle maintenance activities. Such documentation shall be kept on site for a
period of five (5) years and made available to the Director or the Director's authorized
representative immediately upon request.
Part III Page 3 of 3

Permit No. NCG 140000
PART IV MONITORING, CONTROLS, AND LIMITATIONS FOR PERMITTED
DISCHARGES
SECTION A: STORMWATER DISCHARGES - ANALYTICAL MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the
permittee is authorized to discharge stormwater associated with industrial activity subject to the
provisions of this permit. Stormwater that is commingled with wastewater shall be considered
wastewater, and is not covered under this section of the permit.
Analytical monitoring of stormwater discharges shall be performed as specified below in Table 1.
All analytical monitoring shall be performed during a measurable storm event at each
stormwater discharge outfall (SDO).
A measurable storm event is a storm event that results in an actual discharge from the
permitted site outfall. The previous measurable storm event must have been at least 72 hours
prior. The 72-hour storm interval does not apply if the permittee is able to document that a
shorter interval is representative for local storm events during the sampling period, and obtains
approval from the local DWQ Regional Office. See definitions for more information.
Table 1. Analytical Monitoring Requirements for Stormwater Discharges
Discharge
Measurement-
Sample
Sample
Characteristics
Units
Frequency'
Type7
Location3
H
standard
Semi-annual
Grab
SDO
Total Suspended Solids
m I.
Semi-annual
Grab
SDO
Event Duration
minutes
. Semi-annual
-
-
4
Total Rainfall
inches
Semi-annual
On -site
_
Rain gauge
Footnotes:
1. Twice per year during a measurable storm event, per the schedule in Table 2. See below for additional
requirement for failures to monitor.
2. Grab samples shall he collected within the first 34 minutes of discharge from an SDO or detention pond.
3. Samples shall be collected at each stormwater discharge outfall (SDO) unless representative outfall status
(ROS) has been granted and documented by the Division of Water Quality. A copy of the letter granting
ROS shall be kept on site.
4. For each sampled measurable storm event the total precipitation must be recorded using data from an
on -site rain gauge.
A minimum of 60 days must separate each monitoring event unless additional monitoring has
been instituted.
The permittee shall complete the analytical samplings in accordance with the schedule specified in
Table 2, unless adverse weather conditions prevent sample collection. Inability to sample due to
adverse weather conditions must be documented in the SPPP (see Adverse Weather in Definitions)
and reported on the DMR.
Part IV Page 1 of 11

Permit No. NCG140000
Table 2. Monitoring Schedule
Semi -Annual
Monitoring Events'.x
Start Date
(All Years)3
End -Date
(All Years) s
1
July 1
December 31
2
anua 1
June 30
Footnotes,
1. Maintain semi-annual monitoring during permit renewal process. irat the expiration of the General
Permit, the permittee has submitted an application for renewal of coverage before the submittal deadline,
the permittee will be considered for renewed coverage. The applicant must continue semi-annual
monitoring until the renewed Certificate of Coverage is issued.
2. If no discharge occurs during the sampling period, the permittee must submit a monitoring report
indicating "No Flow" within 30 days of the end of the sampling period.
3. Monitoring periods remain constant throughout the five-year permit term.
Failure to monitor semi-annually per permit terms, immediately institutes monthly monitoring for
all stormwater parameters. After six (6) months of monthly monitoring, the permittee may return
to a semi-annual sampling monitoring schedule, unless DWQ requires continued monthly
monitoring.
The permittee shall compare monitoring results to benchmark values in Table 3. Exceedences of
benchmark values require the permittee to increase monitoring, increase management actions,
increase record keeping, and/or install stormwater Best Management Practices (BMPs) in a tiered
program, See the descriptions of Tier One, Tier Two, and Tier Three Response Actions, below.
Table 3. Benchmark Values for Analytical Monitoring Requirements
Discharge Characteristics
Units
Benchmark Values
pH
standard
6.0 - 9.0
Total Suspended Solids (TSS)
mg/L
100
TSS (ORW, HWQ, Trout & PNA
waters
mg/L
50
Part IV Page 2 of 11

Permit No. NC1,14UUUU
Tier One
If: The first valid sampling results are above a benchmark value, or outside of the benchmark
range, for any stormwater parameter at any outfall;
Then the permittee shall:
1. Conduct a stormwater management inspection of the facility within two weeks of
receiving sampling results.
2. Identify and evaluate possible causes of the ,benchmark value exceedence.
3. Identify potential and select the specific: source controls, operational controls, or physical
improvements to reduce concentrations of the stormwater parameters of concern, and/or
to bring concentrations within the benchmark range.
4. Implement the selected actions within two months of the inspection.
S. Record each instance of a Tier One response in the Stormwater Pollution Prevention Plan.
Include the date and value of the benchmark exceedence, the inspection date, the
personnel conducting the inspection, the selected actions, and the date the selected
actions were implemented.
Tier Two
If: During the term of this permit, the first valid sampling results from two consecutive monitoring
periods are above the benchmark values, or outside of the benchmark range, for any specific
stormwater parameter at a specific discharge outfall;
Then the permittee shall:
1. Repeat all the required actions outlined above in Tier One.
2. Immediately institute monthly monitoring for,all stormwater parameters at every outfall
where a sampling result exceeded the benchmark value for two consecutive samples.
Monthly (analytical and qualitative) monitoring shall continue until three consecutive
sample results are below the benchmark values or within the benchmark range.
3. If no discharge occurs during the sampling period, the permittee is required to submit a
monthly monitoring report indicating "No Flow" to comply with reporting requirements.
"No flow" reports will not be considered as one of the three consecutive sample results
under the benchmark.
4. Maintain a record of the Tier Two response in the Stormwater Pollution Prevention Plan.
Part IV Page 3 of 11

Permit No. NCG140000
Tier Three
]luring the term of this permit, if the valid sampling results required for the permit monitoring
periods exceed the benchmark value, or are outside the benchmark range, for any specific
stormwater parameter at any specific outfall on four occasions, the permittee shall notify the
DWQ Regional Office Supervisor in writing within 30 days of receipt of the fourth analytical
results. DWQ may but is not limited to;
• Require that the permittee revise, increase, or decrease the monitoring frequency for the
remainder of the permit;
• Rescind coverage under the General Permit, and require that the permittee apply for an
individual stormwater discharge permit;
• Require the permittee to install structural stormwater controls;
• Require the permittee to implement other stormwater control measures; or
• Require the permittee toyerform upstream and downstream monitoring to characterize
impacts on receiving waterbodies.
Part: IV Page 4 of 11

Permit No. NCG140000
SECTION B: STORMWATER DISCHAR13ES — ON -SITE VEHICLE MAINTENANCE AREA
(VMA) MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the
permittee is authorized to discharge stormwater associated with vehicle maintenance activities
occurring on site.
Facilities which have any vehicle maintenance activity occurring on site using more than 55 gallons
of new motor oil per month when averaged over the calendar year shall perform analytical
monitoring as specified in Table 4. All analytical monitoring shall be performed during a
measurable storm event at each vehicle maintenance outfall. VMA stormwater discharges
commingled with wastewater shall be considered wastewater. For more information see Part IV,
Section D of this permit.
Table 4. Stormwater Analytical Monitoring Requirements for On -Site Vehicle Maintenance
Measurement
Sample
Sample
Discharge Characteristics
Units
,
z
Type
Location a
Fre aen
H
standard
Semi-annual
Grab
SDO
Total Petroleum Hydrocarbons (TPH),
mg/L
Semi-annual
Grab
EPA Method 1664 5GT-HEM
.SDO
Total Suspended Solids
m L
Semi-annual
Grab
SDO
Event Duration
minutes
Semi-annual
-
-
Total Rainfall4
inches
Semi-annual
On -site
"
Rain gauge
Gallons/
New Motor Oil Usage
Semi-annual
Estimate
-
month
Footnotes:
1.. Twice per year during a measurable storm event, per the schedule in Table 2•, See below for additional
requirements for failures to monitor.
2. Grab samples shall be collected within the first 30 minutes of discharge from an SDO or detention pond.
3. Samples shall be collected at each stormwater discharge outfall (SDO) that discharges stormwater runoff
from area(s) where vehicle maintenance activities occur.
4. For each sampled measurable storm event the total precipitation must be recorded using data from an
on -site rain gauge.
A minimum of 60 days must separate each monitoring event unless additional monitoring has
been instituted.
The permittee shall complete the analytical samplings in accordance with the schedule specified in
Table 2 unless adverse weather conditions prevent sample collection. Inability to sample due to
adverse weather conditions must be documented in the SPPP and reported on the DMR (see
Adverse Weather in Definitions).
Failure to monitor semi-annually per permit terms, immediately institutes monthly monitoring for
all stormwater parameters. After six (6) months of monthly monitoring, the permittee may return
to a semi-annual sampling monitoring schedule, unless DWQ requires continued monthly
monitoring.
The permittee shall compare monitoring results to benchmark values in Table 5. Exceedences of
benchmark values require the permittee to increase monitoring, increase management actions,
Part IV Page 5 of 11

Permit No. NCG140000
increase record keeping, and/or install storrnwater Best Management Practices (BMPs) in a tiered
program. The permittee shall comply with the required Tier One, Tier Two, and Tier Three
response actions identified in Section A.
Table S. Stormwater Benchmark Values for On -Site Vehicle Maintenance Activities
Discharge Characteristics..
Emits
Benchmark Values
pH
Standard
6.0 - 9.0
Total Petroleum Hydrocarbons (TPH),
EPA Method 1664 SGT-HEM
mg/L
15
Total Suspended Solids (TSS)
I mg/L
1.00
TSS ORW, HWQ, Trout & PNA waters)
I mg L
50
Part: IV Page 6 of 11

Permit No. NCG140000
SECTION C: STORMWATER DISCHARGES - QUALITATIVE MONITORING
REQUIREMENTS
The purpose of qualitative monitoring is to evaluate the effectiveness of the Stormwater Pollution
Prevention Plan and to assess new sources of stormwater pollution.
Qualitative monitoring requires a visual inspection of each stormwater outfall regardless of
representative outfall status and shall be performed as specified below in Table 6, during
analytical monitoring event (unless the permittee is required to perform further qualitative
sampling per the Qualitative Monitoring Response, below). Inability to sample due to adverse
weather conditions must be documented in the SPPP and reported on the DMR (see Adverse
Weather it? Definitions), Qualitative monitoring of stormwater outfalls must be performed during a
measurable storm event.
Table 6. Qualitative Stormwater Monitoring Re uirements
Discharge Characteristics
Frequency'
MonitorLocationz
Color
Semi-annual
SIX)
Odor
Semi-annual
SDO
Clarity
Semi-annual
SDO
Floating Solids
Semi-annual
SDO
Suspended Solids
Semi-annual
SDO
Foam
Serni-awmal
SDO
Oil Sheen
Semi-annual
SDO
Erosion or deposition at the outfall
Semi-annual
SI)o
Other indicators
of stormwater pollution
Semi-annual
SDO
Footnotes:
1. Twice per year during a measurable monitoring event per the schedule in Table 2.
2. Qualitative monitoring shall be performed at each stormwater discharge outfall (00) regardless of
representative outfall status.
A minimum of 60 days must separate monitoring dates, unless additional sampling has been
instituted as part of other analytical monitoring requirements in this permit.
If the permittee's qualitative monitoring indicates that existing stormwater BMPs are ineffective, or
that significant stormwater contamination is present, the permittee shall investigate potential
causes, evaluate the feasibility of corrective actions, and implement those corrective actions within
60 days, per the Qualitative Monitoring Response, below. A written record of the permittee's
investigation, evaluation, and response actions shall be kept in the Stormwater Pollution
Prevention Plan.
Part IV Page 7 of 91

Permit No. NCG140000
Qualitative monitoring is for the purposes of evaluating the effectiveness of the Stormwater
Pollution Prevention Plan, assessing new sources of stormwater pollution, and prompting the
permittee's response to pollution. If the permittee repeatedly fails to respond effectively to correct
problems identified by qualitative monitoring, or if the discharge causes or contributes to a water
quality standard violation, DWQ may but is not limited to:
• Require that the permittee revise, increase, or decrease the monitoring frequency for the
remainder of the permit;
• Rescind coverage under the General Permit, and require that the permittee apply for an
individual stormwater discharge permit;
• Require the permittee to install structural stormwater controls; or
• Require the permittee to implement other stormwater control measures.
Fart IV Page 8 of l I

Permit No. NCG140000
SECTION D: PROCESS WASTEWATER DISCHARGES - ANALYTICAL MONITORING
REQUIREMENTS
This General Permit authorizes the discharge of process wastewater associated with three distinct
activities: 1) vehicle and equipment cleaning - external surfaces, 2) wetting of raw material
stockpiles, and 3) mixing drum cleanout. The authorization to discharge wastewater is specifically
identified on each permittee's COC. Process wastewater discharges generated by any other
activity are not authorized under this permit, except allowable non-stormwater discharges
permitted by 15A NCAC2H.6106(f). Authorized process wastewater commingled with stormwater
shall be considered process wastewater.
1. Process Wastewater Associated with Vehicle and Equipment Cleaning
During the period beginning on the effective date of the permit and lasting until expiration, the
permittee is authorized to discharge process wastewater associated with vehicle and equipment
cleaning, subject to the provisions of this permit, For the purposes of this permit, vehicle and
equipment cleaning is limited to the rinsing of the external surfaces of vehicles and equipment.
2. Process Wastewater Associated with Raw Material Stockpiles
During the period beginning on the effective date of the permit and lasting until expiration, the
permittee is authorized to discharge process wastewater associated with wetting of raw material
stockpiles, subject to the provisions of this permit.
3. Process Wastewater Associated with Mixing Drum Cleanout
During the period beginning on the effective date of the permit and lasting until expiration, the
permittee is authorized to discharge process wastewater associated with mixing drum cleanout,
subject to the provisions of this permit.
All Authorized Process Wastewater Discharges
Analytical monitoring of the above authorized process wastewater discharges shall be performed
as specified in Table 7.
If authorized process wastewaters commingle prior to discharge, sampling the combined discharge
will meet the monitoring requirements of this permit. Sampling shall be performed during
discharge; these events may or may not be associated with rainfall.
Authorized wastewater treatment facilities may include some wastewater recycling as a means of
volume management.
Surface water discharges from authorized wastewater treatment facilities are subject to the
provisions, monitoring requirements, and limits of this permit. Authorized wastewater treatment
facilities with no wastewater discharges to surface waters are exempt from the requirements of
Part IV, Section D of this permit However, these ready -mixed plants with closed loop -recycle systems
or other wastewater treatment facilities that do not discharge to surface waters must contact
DWQ's Aquifer Protection Section Land Application Unit to obtain any necessary permits or approvals.
Part IV Page 9 of 11

Permit No. NCG140000
Table 7. Analytical Monitoring Requirements for Process Wastewater
Discharge
Characteristics
Units
Measurement
Frequencyl
Sample
T ex
Sample
Location
H
standardQuarterly___Grab
E
Total Suspended Solids
mg/L
Quarterly
Grab
E
Settleable Solids
mL/L
Quarterly
Grab
E
Total Petroleum Hydrocarbons
(TPH), EPA Method 1664 (SGT-
DIEM 4
mg/L
Quarterly4
Grab
E
Discharge Durations
minutes
Quarterly
-
-
Flows
gallons/day
Quarterly
-
E
Footnotes:
1. Four times per year during a discharge event. See below for additional requirements for failures to
monitor or violations of permit limits.
2. Grab samples shall be collected within the first 30 minutes of discharge from the outfall or detention
pond.
3. Effluent (E) = Process wastewater discharge outfall.
4. Process wastewater discharges shall only be monitored for TPH when commingled with stormwater
discharges from VMA areas.
5. For each sampled discharge event, the total discharge duration and flow rate must be provided. Flow
rate can be measured continuously or calculated.
Failure to monitor wastewater quarterly per permit terms immediately institutes monthly monitoring for
all wastewater parameters. Violation of permit limits twice in a row immediately institutes monthly
monitoring for all wastewater parameters. In either case, after six (6) months of monthly monitoring, the
permittee may return to a quarterly monitoring schedule, unless DWQ requires continued monthly
monitoring.
Wastewater discharges must meet the requirements of the effluent limitation listed in Table 8, below. An
exceedence of any of these limitations will result in a violation of the permit conditions.
Part IV Page 10 of 11

Permit No. NCG140000
Table B. Effluent Limitations for all Process Wastewater
Discharge: Characteristics
Units
Effluent Limitations
(Daily Maximum)
pH Range (freshwaters)
Standard
6.0 - 9.0
pH Range (saltwaters)
Standard
6.8 - 8.5
Total Suspended Solids
m L
30
Total Suspended Solids' HQW
m L
20
Total Suspended Solids' Trout & PNA waters
m L
1.0
Settleable Solids
mL L
5
Total Petroleum Hydrocarbons' (TPH)
mg/L
N/A'
Total Volume/Day of Wastewater Discharged
a
(HQW
gallons/day
50% of the
Summer 7Q10 flow
Footnotes:
1. Per 15A NCAC 0213.0224
2. Process wastewater discharges shall only be monitored for TPH when commingled with stormwater
discharges from VMA areas.
3. TPH does not have a limit for wastewater, but instead is subject to benchmarks and provisions of Part IV,
Section A, including the Tiered Response Action,
4, Per l SA NCAC 02B .0224. Perm ittees who discharge wastewater to HQW waters shall obtain a summer
7Q10 flow and report this information to DWQ. If the permittee cannot obtain a summer 7Q10 flow for
the receiving waters at the discharge location, the permittee shall notify DWQ, and the DWQ Regional
Office may require an annual flow report on a case -by -case basis.
The permittee shall complete the analytical samplings of wastewater discharges in accordance with
the schedule specified in Table 9. Permittees shall report any noncompliance per Part V, Section F:
Reporting Requirements, paragraphs 9=11.
Table 9. Monitoring Schedule
Quarterly
Monitoi hg1vents' , R
Start Date
(All Years) '
End.Date
(All Years)
1
July 1
September 30
2
October 1
December 31
3
January 1-
March 31
4
Aril 1
June 30
Footnotes:
1. If no discharge occurs during the sampling period, the permittee must record "No Flow" or "No
Discharge" within 30 days of the end of the three-month sampling period in their SPPP,
If detergents are used in any of the processes authorized in Section D of this permit, they must be
labeled biodegradable, and the pH must be adjusted to within 6 to 9 standard units. Wherever
possible, permittees are encouraged to use phosphate -free detergents. A list of these chemicals
must be kept on site and up to date. A feasibility study must be performed if phosphate -containing
detergents are used (see Part]], Section B for additional information).
Part IV Page 11 of 11

Permit No, NCG140000
PART V STANDARD CONDITIONS FOR NPDES STORMWATER GENERAL
PERMITS
SECTION A, COMPLIANCE AND LIABILITY
Compliance Schedule
The permittee shall comply with Limitations and Controls specified for stormwater
discharges in accordance with the following schedule:
Existing facilities already operating, but applying for coverage under this General Permit for
the first time: The Stormwater Pollution Prevention Plan shall be developed and
implemented within 12 months of the effective date of the initial Certificate of Coverage
issued pursuant to this General Permit and updated thereafter on an annual basis.
Secondary containment, as specified in Part 111, Paragraph 2(b) of this permit, shall be
accomplished within 12 months of the effective date of the initial Certificate of Coverage.
New facilities applying for permit coverage for the first time: All requirements, conditions,
limitations, and controls contained in this permit become effective immediately upon
issuance of the Certificate of Coverage. The Stormwater Pollution Prevention Plan shall be
developed and implemented prior to the beginning of discharges from the operation of the
industrial activity and be updated thereafter on an annual basis. Secondary containment, as
specified in Part 111, Paragraph 2(b) of this permit shall be accomplished prior to the
beginning of discharges from the operation of the industrial activity.
Existing facilities previously permitted and applying for renewal under this General Permit:
All requirements, conditions, limitations, and controls contained in this permit (except new
SPPP elements in this permit renewal) shall become effective immediately upon issuance of
the Certificate of Coverage. New elements of the Stormwater Pollution Prevention Plan for
this permit renewal shall be developed and implemented within 6 months of the effective
date of the initial Certificate of Coverage issued pursuant to this General Permit and updated
thereafter on an annual basis. Secondary containment, as specified in Part III, Paragraph
2(b) of this permit shall be accomplished prior to the beginning of discharges from the
operation of the industrial activity.
2. Duly to Comply
The permittee must comply with all conditions of this General Permit. Any permit
noncompliance constitutes a violation of the Clean Water Act and is grounds for enforcement
action; for certificate of coverage termination, revocation and reissuance, or modification; or
denial of a certificate of coverage upon renewal application.
a. The permittee shall comply with standards or prohibitions established under Section 307(a)
of the Clean Water Act for toxic pollutants within the time provided in the regulations that
establish these standards or prohibitions, even if the permit has not yet been modified to
incorporate the requirement.
b. The Clean Water Act provides that any person who violates a permit condition is subject to a
civil penalty not to exceed $25,000 per day for each violation. Any person who negligently
violates any permit condition is subject to criminal penalties of $2,500 to $25,000 per day of
violation, or imprisonment for not more than 1 year, or both. Any person who knowingly
violates permit conditions is subject to criminal penalties of $5,000 to $50,000 per day of
violation, or imprisonment for not more than 3 years, or both. Also, any person who violates
a permit condition may be assessed an administrative penalty not to exceed $10,000 per
Part V Page 1 of 9

Permit No, NCG140000
violation with the maximum amount not to exceed $125,000. [Ref: Section 309 of the Federal
Act 33 USC 1319 and 40 CFR 122.41(a).]
C. Understate law, a daily civil penalty of not more than ten thousand dollars ($10,000) per
violation may be assessed against any person who violates or fails to act in accordance with
the terms, conditions, or requirements of a permit. [Ref: North Carolina General Statutes
143-215.6A]
d. Any person may be assessed an administrative penalty by the Director for violating Section
301, 302, 306, 307, 308, 318, or 405 of the Act, or any permit condition or limitation
implementing any of such sections in a permit issued under Section 402 of the Act.
Administrative penalties for Class I violations are not to exceed $10,000 per violation, with
the maximum amount of any Class 1 penalty assessed not to exceed $25,000. Penalties for
Class 11 violations are not to exceed $10,000 per day for each day during which the violation
continues, with the maximum amount of any Class If penalty not to exceed $125,000.
3. Duty to Mitigate
The permittee shall take all reasonable steps to minimize or prevent any discharge in
violation of this General Permit which has a reasonable likelihood of adversely affecting
human health or the environment.
4. Civil and Criminal Liability
Except as provided in this permit regarding bypassing of stormwater control facilities,
nothing in this General Permit shall be construed to relieve the permittee from any
responsibilities, liabilities, or penalties for noncompliance pursuant to NCGS 143-215.3,143-
215.6A, 143-215.613, 143-215.6C or Section 309 of the Federal Act, 33 USC 1319.
Furthermore, the permittee is responsible for consequential damages, such as fish kills, even
though the responsibility for effective compliance may be temporarily suspended.
5. Oil and Hazardous Substance Liability
Nothing in this General Permit shall be construed to preclude the institution of any legal
action or relieve the permittee from any responsibilities, liabilities, or penalties to which the
permittee is or may he subject to under NCGS 143-215.75 et seq. or Section 311 of the Federal
Act, 33 USC 1321.
6. Property Rights
The issuance of this General Permit does not convey any property rights in either real or
personal property, or any exclusive privileges, nor does it authorize any injury to private
property or any invasion of personal rights, nor any infringement of federal, state or local
laws or regulations.
7. Severability
The provisions of this General Permit are severable, and if any provision of this General
Permit or the application of any provision of this General Permit to any circumstances, is
held invalid, the application of such provision to other circumstances, and the remainder of
this General Permit, shall not be affected thereby.
S. Duty to Provide Information
Part . V Page 2 of 9

Permit No, NCG140000
The permittee shall furnish to the Director, within a reasonable time, any information which
the Director may request to determine whether cause exists for modifying, revoking and
reissuing, or terminating the certificate of coverage issued pursuant to this General Permit
or to determine compliance with this General Permit. The permittee shall also furnish to the
Director upon request, copies of records required to be kept by this General Permit.
P-enaities for Tampering
The Clean Water Act provides that any person who falsifies, tampers with, or knowingly
renders inaccurate, any monitoring device or method required to be maintained under this
General Permit shall, upon conviction, be punished by a fine of not more than $10,000 per
violation, or by imprisonment for not more than two years per violation, or by both, If a
conviction of a person is for a violation committed after a first conviction of such person
under this paragraph, punishment is a fine of not more than $20,000 per day of violation, or
by imprisonment of not more than 4 years, or both.
10. Penalties for Falsification of Refer
The Clean Water Act provides that any person who knowingly makes any false statement,
representation, or certification in any record or other document submitted or required to be
maintained under this General Permit, including monitoring reports or reports of
compliance or noncompliance shall, upon conviction, be punished by a fine of not more than
$10,000 per violation, or by imprisonment for not more than two years per violation, or by
both.
SECTION B: GENERAL CONDITIONS
General Permit Expiration
The permittee is not authorized to discharge after the expiration date. In order to discharge
beyond the expiration date, the permittee shall submit forms and fees as are required by the
agency authorized to issue permits no later than 180 days prior to the expiration date.'Any
permittee that has not requested renewal at least 180 days prior to expiration, or any
permittee that does not have a permit after the expiration and has not requested renewal at
least 180 days prior to expiration, will be subjected to enforcement procedures as provided
in NCGS §143-2153.6 and 33 USC 1251 et. seq.
2, Transfers
The certificate of coverage issued pursuant to this General Permit is not transferable to any
person except after notice to and approval by the Director. The Director may require
modification or revocation and reissuance of the certificate of coverage to change the name
and incorporate such other requirements as may be necessary under the Clean Water Act.
The permittee is required to notify the Division within 60 days in the event the
permitted facility is sold or closed.
3. When an Individual Permit May be Required
The Director may require any owner/operator authorized to discharge under a certificate of
coverage issued pursuant to this General Permit to apply for and obtain an individual permit
or an alternative General Permit. Any interested person may petition the Director to take
action under this paragraph. Cases where an individual permit may be required include, but
are not limited to, the following:
a. The discharger is a significant contributor of pollutants;
Part V Page 3 of 9

Permit No. NCG140000
b. Conditions at the permitted site change, altering the constituents and/or
characteristics of the discharge such that the discharge no longer qualifies for a
General Permit;
C. The discharge violates the terms or conditions of this General Permit;
d. A change has occurred in the availability of demonstrated technology or practices
for the control or abatement of pollutants applicable to the point source;
e. Effluent limitations are promulgated for the point sources covered by this General
Permit;
f. A water quality management plan containing requirements applicable to such point
sources is approved after the issuance of this General Permit;
g. The Director determines at his or her own discretion that an individual permit is
required.
When an Individual Permit May be Requested
Any permittee operating under this General Permit may request to be excluded from the
coverage of this General Permit by applying for an individual permit. When an individual
permit is issued to an owner/operator the applicability of this General Permit is
automatically terminated on the effective date of the individual permit.
5. Signatory Requirements
All applications, reports, or information submitted to the Director shall be signed and
certified.
a. All notices of intent to he covered under this General Permit shall be signed as
follows,
(1) For a corporation: by a responsible corporate officer. For the purpose of
this section, a responsible corporate officer means: (a) a president,
secretary, treasurer or vice president of the corporation in charge of a
principal business function, or any other person who performs similar
policy or decision making functions for the corporation, or (b) the manager
of one or more manufacturing production or operating facilities employing
more than 250 persons or having gross annual sales or expenditures
exceeding 25 million (in second quarter 1980 dollars), if authority to sign
documents has been assigned or delegated to the manager in accordance
with corporate procedures.
(2) For a partnership or sole proprietorship: by a general partner or the
proprietor, respectively; or
(3) For a municipality, state, federal, or other public agency: by either a
principal executive officer or ranking elected official.
b. All reports required by the General Permit and other information requested by the
Director shall be signed by a person described above or by a duly authorized
representative of that person. A person is a duly authorized representative only if:
(1) The authorization is made in writing by a person described above;
(2) The authorization specified either an individual or a position having
responsibility for the overall operation of the regulated facility or activity,
such as the position of plant manager, operator of a well or well field,
superintendent, a position of equivalent responsibility, or an individual or
Part V Page 4 of 9

Permit No. NCG140000
position having overall responsibility for environmental matters for the
company. (A duly authorized representative may thus be either a named
individual or any individual occupying a named position.); and
(3) The written authorization is submitted to the Director.
C. Any person signing a document under paragraphs a. or b. of this section shall make
the following certification which shall not be modified in any way:
"1 certify, under penalty of Saw, that this document and all attachments were
prepared under my direction or supervision in accordance with a system designed
to assure that qualified personnel properly gather and evaluate the information
submitted. Based on my inquiry of the person or persons who manage the system,
or those persons directly responsible for gathering the information, the information
submitted is, to the best of my knowledge and belief, true, accurate, and complete. I
am aware that there are significant penalties for submitting false information,
including the possibility of fines and imprisonment for knowing violations."
6. General Permit Modification. Revocation and Reissuance. or Termination
The issuance of this General Permit does not prohibit the Director from reopening and
modifying the General Permit, revoking and reissuing the General Permit, or terminating the
General Permit as allowed by the laws, rules, and regulations contained in Title 40, Code of
Federal Regulations, Parts 122 and 123; Title 15A of the North Carolina Administrative Code,
Subchapter 2H .0100; and North Carolina General Statute 143-215.1 et. al.
After public notice and opportunity for a hearing, the General Permit may be terminated for
cause. The filing of a request for a General Permit modification, revocation and reissuance,
or termination does not stay any General Permit condition. The certificate of coverage shall
expire when the General Permit is terminated.
Certificate of Coverage Actions
The certificate of coverage issued in accordance with this General Permit may be modified,
revoked and reissued, or terminated for cause. The notification of planned changes or
anticipated noncompliance does not stay any General Permit condition.
SECTION C: OPERATION AND MAINTENANCE OF POLLUTION CONTROLS
1. Proper Operation and Maintenance
The permittee shall at all times properly operate and maintain all facilities and systems of
treatment and control (and related appurtenances) which are installed or used by the
permittee to achieve compliance with this General Permit. Proper operation and
maintenance also includes adequate laboratory controls and appropriate quality assurance
procedures. This provision requires the operation of back-up or auxiliary facilities or similar
systems which are installed by a permittee only when the operation is necessary to achieve
compliance with the General Permit.
2. Need to Halt or Rgduce n,Qt a Defense
It shall not be a defense for a permitl ee in an enforcement action that it would have been
necessary to halt or reduce the permitted activity in order to maintain compliance with the
condition of this General Permit.
Part V Page 5 of 9

Permit No. NCG140000
Bypassing of Stormwater Control Facilities
Bypass is prohibited and the Director may take enforcement action against a permittee for
bypass unless:
a. Bypass was unavoidable to prevent loss of life, personal injury or severe property
damage; and
b. There were no feasible alternatives to the bypass, such as the use of auxiliary
control facilities, retention of stormwater or maintenance during normal periods of
equipment downtime or dry weather. This condition is not satisfied if adequate
backup controls should have been installed in the exercise of reasonable
engineering judgment to prevent a bypass which occurred during normal periods of
equipment downtime or preventive maintenance, and
C. The permittee submitted notices as required under Section E of this Part.
If the Director determines that it will meet the three conditions listed above, the Director
may approve an anticipated bypass after considering its adverse effects.
iniz of Wastewater Treatment Facilities
The permittees may allow any bypass to occur which does not cause effluent limitations to
be exceeded, but only if it also is for essential maintenance to assure efficient operation.
These bypasses are not subject to the provisions of Part V, Section C.4.a and Part V, Section
C.4.b.
a. Notices
(1) Anticipated bypass. If the permittees knows in advance of the need for a
bypass, it shall submit prior notice, if possible at least ten days before the
date of the bypass, including an evaluation of the anticipated quality and
affect of the bypass.
(2) Unanticipated bypass. The permittees shall submit notice within 24 hours
of becoming aware of an unanticipated bypass as required in Part V, Section
E.8. of this permit,
b. Prohibition of Bypass
(1) Bypass is prohibited and the Director may take enforcement action against
the permittees for bypass, unless:
(a) Bypass was unavoidable to prevent loss of life, personal injury or
severe property damage; and
(b) There were no feasible alternatives to the bypass, such as the use of
auxiliary control facilities, retention of untreated waste or
maintenance during normal periods of equipment_ downtime. This
condition is not satisfied if adequate -backup should have been
installed in the exercise of reasonable engineering judgment to
prevent a bypass which occurred during normal periods of
equipment downtime or preventive maintenance; and
(c) The permittees submitted notices as required under Part V, Section
C.4.a of this permit.
Part V Page 6 of 9

Permit No, NCG140000
(2) The Director may approve an anticipated bypass, after considering its
adverse affects, if the Director determines that it will meet the three
conditions listed in Part V, Section CA.b.(1) of this permit.
SECTION D: MONITORING AND RECORDS
Representative Sampling
Samples collected and measurements taken, as required herein, shall be characteristic of the
volume and nature of the permitted discharge. Analytical stormwater sampling shall be
performed during a measurable storm event. Samples shall be taken on a day and time that is
characteristic of the discharge. All samples shall be taken before the discharge joins or is diluted
by any other waste stream, body of water, or substance. Monitoring points as specified in this
permit shall not be changed without notification to and approval of the Director.
Recording Results
For each measurement, sample, inspection or maintenance activity performed or collected
pursuant to the requirements of this General Permit, the permittee shall record the following
information:
a. The date, exact place, and time of sampling, measurements, inspection or maintenance
activity;
b. The individual(s) who performed the sampling, measurements, inspection or maintenance
activity;
C. The date(s) analyses were performed;
d. The individual(s) who performed the analyses;
e. The analytical techniques or methods used; and
f. The results of such analyses.
Flow Measurements
Where required, appropriate flow measurement devices and methods consistent with accepted
scientific practices shall be selected and used to ensure the accuracy and reliability of
measurements of the volume of monitored discharges.
4. Test Procedures
Test procedures for the analysis of pollutants shall conform to the EMC regulations published
pursuant to NCGS 143-215.63 et. seq, the Water and Air Quality Reporting Acts, and to regulations
published pursuant to Section 304(g), 3311SC 1314, of the Federal Water Pollution Control Act, as
Amended, and Regulation 40 CFR 136.
To meet the intent of the monitoring required by this General Permit, all test procedures must
produce minimum detection and reporting levels and all data generated must be reported down
to the minimum detection or lower reporting level of the procedure.
Establishing Representative Outfall
If a facility has multiple discharge locations with substantially identical stormwater discharges
that are required to be sampled, the permittee may petition the Director for representative outfall
status. If it is established that the stormwater discharges are substantially identical and the
permittee is granted representative outfall status, then analytical sampling requirements may be
performed at a reduced number of out€alls. Qualitative monitoring shall be performed at all
discharges locations regardless of representative outfall status CROS).
6. Records Retention
Visual monitoring shall be documented and records maintained at the facility along with the
Stormwater Pollution Prevention Plan. Copies of analytical monitoring results shall also be
maintained on site. The permittee shall retain records of all monitoring information, including all
calibration and maintenance records and all original strip chart recordings for continuous
Part V Page 7 of 9

Perniic No. NCG140000
SECTION B: REQUIREMENTS FOR OPERATION OF WASTEWATER TREATMENT
FACILITIES
Existing, new, and expanding wastewater treatment facilities for covered wastewater discharges
shall be subject to the following operational requirements.
1. Operation and maintenance of treatment facilities must be in accordance with the
requirements in this General Permit. For the purposes of this permit no documentation
other than a signed Certificate of Coverage is required to operate an existing treatment
facility. New treatment facilities must also have an Authorization to Construct (ATC)
permit, with the exceptions noted in Section A above.
Diversion or bypass of untreated wastewater from a treatment facility is prohibited except
under provisions of this permit in Part V, Section CA and Part V, Section E.8
3. to the event that a facility fails to perform satisfactorily, including the creation of nuisance
conditions, the permittee shall take immediate corrective action, including those actions
that may be required by this Division, such as the construction of additional or replacement
treatment or disposal facilities.
4. The issuance of this permit shall not relieve the permittee of the responsibility for damages
to surface waters of the state resulting from the operation of a treatment facility,
5. Any discharge from a treatment system to groundwater must protect the groundwater
standards specified in 1 SA NCAC 2L, Groundwater Classification and Standards. Contact
DWQ Aquifer Protection Section for mare information.
6. Any groundwater quality monitoring, as deemed reasonably necessary by the Division, shall
he provided.
7. Fiocculants evaluated by the Division may be used if administered in accordance with
maximum application doses and any other current requirements. No other chemical
flocculants shall be used in the treatment facility without prior written authorization from
the Division. Polyacrylamide (PAMS) information can be found through the Stormwater
Permitting Unit website.
B. All discharges of process wastewater will be monitored in accordance with fart IV, Section
D of this permit.
9. A list of detergents, additives, polymers, brighteners and any other solvent, cleaning agents,
or like chemicals used on site in the industrial process, must be kept on site and up to date.
Additionally, this list shall include use schedule, quantity, MSDS sheets and aquatic
toxicology data (if available). If phosphate -containing detergents are used on site, a
feasibility study must be performed to show the viability of using phosphate -free
detergents. The feasibility study shall be kept on the site and updated annually.
10. A record of unauthorized wastewater releases to surface waters, wetlands, or ground
surface from closed -loop recycle systems permitted by the Aquifer Protection Section shall
be documented and kept on site for a period of five (5) years, when stormwater discharges
from these sites are permitted under NCG140000.
Part II Page 2 of 2

Permit No. NCG140000
PART III STORMWATER POLLUTION PREVENTION PLAN
The permittee shall develop and implement a Stormwater Pollution Prevention Plan (SPPP). This plan
shall be considered public information in accordance with Part V, Standard Conditions, Section E of this
General Permit. The SPPP shall include, at a minimum, the following items:
Site Plan. The site plan shall provide a description of the physical facility and the potential
pollutant sources which may be expected to contribute to contamination of stormwater
discharges. The site plan shall contain the following:
(a) A general location map (USGS quadrangle map or appropriately drafted equivalent map),
showing the facility's location in relation to transportation routes and surface waters, the name
of the receiving water(s) to which the stormwater outfall(s) discharges, or if the discharge is to a
municipal separate storm sewer system, the name of the municipality and the ultimate receiving
waters, and latitude and longitude of the point(s) of discharge. The general location map (or
alternatively the site map) shall identify whether the receiving water is impaired (on the state's
303(d) list of impaired waters) or is located in a watershed for which a TMDL has been
established, and what the parameter(s) of concern are.
(b) A narrative description of storage practices, loading and unloading activities, outdoor process
areas, crushing activities, dust or particulate generating or control processes, and waste disposal
practices. A narrative description of the potential pollutants which could be expected to be
present in the stormwater discharge from each outfall. A narrative description of handling and
storage of fly ash, ash by-products, and recycled materials.
(c) A site map drawn at a scale sufficient to clearly depict: the site property boundary, the
stormwater discharge outfalls, all on -site and adjacent surface waters and wetlands, industrial
activity areas (including storage of materials, spill hits, disposal areas, process areas, loading
and unloading areas, and haul roads), site topography, all drainage features and structures,
drainage areas for each outfall, direction of flow in each drainage area, industrial activities
occurring in each drainage area, buildings, existing BMPs, and impervious surfaces. The site
map shall include a distance legend and must indicate the percentage of each drainage area that
is impervious.
(d) A list of significant spills or leaks of pollutants that have occurred at the facility during the three
(3) previous years and any corrective actions taken to mitigate spill impacts.
(e) Certification that the stormwater outfalls have been evaluated for the presence of non-
stormwater discharges. The certification statement will be signed in accordance with the
requirements found in Part V, Standard Conditions, Section B, Paragraph 5. The permittee shall
re -certify annually that the stormwater outfalls have been evaluated for the presence of non-
stormwater discharges.
2. Stormwater Management Plan. The stormwater management plan shall contain a narrative
description of the materials management practices employed which control or minimize the
exposure of significant materials to stormwater, including structural and nonstructural
measures. The stormwater management plan, at a minimum, shall incorporate the following:
(a) Feasibility Study. A review of the technical and economic feasibility of changing the
methods of operations and/or storage practices to eliminate or reduce exposure of materials
and processes to stormwater. Wherever practical, the permittee shall prevent exposure of all
storage areas, material handling operations, and manufacturing or fueling operations. In areas
where elimination of exposure is not practical, the stormwater management plan shall
document the feasibility of diverting stormwater runoff away from areas of potential
contamination.
Part III Page 1 of 3

Permit No. NCG 140000
PART 11 AUTHORIZATION TO CONSTRUCT AND OPERATE A TREATMENT
FACILITY
Ready -mixed operations involving construction and operation of wastewater treatment facilities
for authorized process wastewater discharges are subject to construction and operation
requirements for treatment facilities as outlined in Sections A and B below.
SECTION A: REQUIREMENTS FOR CONSTRUCTING NEW OR EXPANDING
WASTEWATER TREATMENT FACILITIES
New or expanding wastewater treatment facilities designed to discharge wastewater
covered under this permit to surface waters must receive an Authorization to Construct
ATC associated with this permit.
Closed -Loop Recycle Systems which meet design requirements in 15A NCAC 02T .1000 and
do not discharge to surface waters, do not require an Authorization to Construct associated
with this permit. However, these facilities must contact DWQ's Aquifer Protection Section
Land Application Unit to obtain any necessary permits or approvals.
2. Application for the ATC requires that plans and specifications be submitted to the Division
of Water Quality, Stormwater Permitting Unit, 1617 Mail Service Center, Raleigh, NC 27699-
1617 for approval.
3. Upon approval of plans and specifications by the Division, a set of approved plans and
specifications for the subject project will be returned to the permittee. These plans must be
retained on site by the permittee for the life of the treatment facility.
Upon receipt of an approved ATC, approved treatment facilities shall be constructed and
implemented in accordance with the conditions of this permit, approved plans and
specifications, and other supporting data. Treatment facilities shall be constructed to meet
the effluent limitations in Part 1V, Section D of this General Permit.
Upon completion of construction and prior to operation of a permitted facility, a
certification must be received from a professional engineer in accordance with G.S. 89-25
confirming that the permitted facility has been installed in accordance with this permit, the
approved plans and specifications, and other supporting materials. Mail the Certification of
plans and specifications to the Division of Water Quality, Stormwater Permitting Unit, 1617
Mail Service Center, Raleigh, NC 27699-161T
The permittee shall notify the DWQ Regional Office at least seventy-two (72) hours in
advance of operation of the installed facilities so that an in -place inspection can be made if
the Regional Office so desires. Such notification to the Regional Supervisor shall be made
during normal business hours from 8:00 a.m. until 5:00 p.m. on Monday through Friday,
excluding State Holidays.
Part 11 Page 1 of 2

Permit No, NCG140000
TABLE OF CONTENTS
PART I - INTRODUCTION
Section A: General Permit Coverage
Section B: Permitted Activities
PART 11 AUTHORIZATION TO CONSTRUCT AND OPERATE A TREATMENT FACILITY
Section A: Requirements for Constructing New or Expanding Wastewater Treatment Facilities
Section B: Requirements for Operation of Wastewater Treatment Facilities
PART IH STORMWATER POLLUTION' PREVENTION PLAN
PART 1V MONITORING, CONTROLS, AND LIMITATIONS FOR PERMITTED DISCHARGES
Section A: Stormwater Discharges - Analytical Monitoring Requirements
Section B: Stormwater Discharges - On -site Vehicle Maintenance Monitoring Requirements
Section C: Stormwater Discharges - Qualitative Monitoring Requirements
Section D: Process Wastewater Discharges - Analytical Monitoring Requirements
PART V STANDARD CONDITIONS
Section A: Compliance and Liability
1.
Compliance Schedule
2.
Duty to Comply
3.
Duty to Mitigate
4.
Civil and Criminal Liability
S.
Oil and Hazardous Substance Liability
6.
Property Rights
7.
Severability
S.
Duty to Provide Information
9.
Penalties for Tampering
10.
Penalties for Falsification of Reports
Section B: General Conditions
1.
General Permit Expiration
2.
Transfers
3.
When an Individual Permit May be Required
4.
When an Individual Permit May be Requested
S.
Signatory Requirements

Permit No. NCG140000
6.
General Permit Modification, Revocation and Reissuance, or
Termination
7.
Certificate of Coverage Actions
Section C: Operation and Maintenance of Pollution Controls
1.
Proper Operation and Maintenance
2.
Need to Halt or Reduce not a Defense
3.
Bypassing of Stormwater Control Facilities
4.
Bypassing of Wastewater Treatment Facilities
Section D: Monitoring
and Records
I.
Representative Sampling
2.
Recording Result,-
3.
Flow Measurements
4.
Test Procedures
5.
Establishing Representative Outfall
6.
Records Retention
7.
Inspection and Entry
Section E: Reporting Requirements
1.
Discharge Monitoring Reports
2.
Submitting Reports
3.
Availability of Reports
4.
Non-Stormwater Discharges
5.
Planned Changes
6.
Anticipated Noncompliance
7.
Spills
8.
Reporting Bypass
9.
Twenty-four Hour Reporting
1.0.
Other Noncompliance
11.
Other Information
PART VI LIMITATIONS REOPENER
PART VII ADMINISTERING AND COMPLIANCE MONITORING FEE REQUIREMENTS
PART VII1 DEFINITIONS
11

Permit No. NCG 140000
PART 1 INTRODUCTION
SECTION A: GENERAL PERMIT COVERAGE
All persons desiring to be covered by this General Permit must register with the Division of Water
Quality (DWQ) by the filing of a Notice of Intent (NOl) and applicable fees. The N01 shall be
submitted and a certificate of coverage issued prior to any point source discharge of stormwater
and/or authorized discharge of process wastewater associated with industrial activity.
Any owner or operator not wishing to be covered or limited by this General Permit may make
application for an individual NPDES permit in accordance with NPDES procedures in 15A NCAC 2H
.0100, stating the reasons supporting the request. Any application for an individual permit should
be made at least 180 days prior to commencement of discharge and must be secured prior to
commencement of discharge.
This General Permit does not cover activities or discharges covered by an individual NPDES permit
until the individual permit has expired or has been revoked. Any person conducting an activity
covered by an individual permit but which could be covered by this General Permit may request
that the individual permit be revoked and coverage under this General Permit be provided.
Any facility may apply for new or continued coverage under this permit until a Total Maximum
Daily Load (TMDL) for pollutants for stormwater discharges is established. A TMDL sets a pollutant
loading limit that affects a watershed, or portion of a watershed, draining to an impaired water.
For stormwater discharges to watersheds affected by a TMDL, coverage under this permit
may depend on the facility demonstrating it does not have reasonable potential to violate
applicable water quality standards for those pollutants as a result of discharges. If the
Division determines that discharges have reasonable potential to cause water quality standard
violations, the facility shall apply for an individual permit 180 days prior to the expiration date of
this General Permit. Once that permit is effective, the permittee will no longer have coverage under
this General Permit. [Note the facility must identify impaired waters (scheduled for TMDL
development) and waters already subject to a TMDL in the Site Plan, as outlined in the Stormwater
Pollution Prevention Plan, in Part 1111.
During the period beginning on the effective date of the permit and lasting until expiration, the
permittee is authorized to discharge stormwater and authorized process wastewater associated
with industrial activity. Such discharges shall be controlled, limited, and monitored as specified in
this permit.
SECTION B: PERMITTED ACTIVITIES
Until this permit expires, is modified, or is revoked, the permittee is authorized to discharge
stormwater and authorized process wastewater to the surface waters of North Carolina or separate
storm sewer system which has been adequately treated and managed in accordance with the terms
and conditions of this General Permit. All discharges shall be in accordance with the conditions of
this permit.
The types of authorized discharges are dependent upon DWQ approval and are detailed in the
permittee's individual Certificate of Coverage (COC). Where applicable, the COC also details DWQ's
Authorization to Construct (ATC), and Authorization to Operate a wastewater treatment facility.
Any other point source discharge to surface waters of the state is prohibited unless it is an
allowable non-stormwater discharge or is covered by another permit, authorization, or approval.
Part I Page 1 of 2

Permit No. NCG 140000
The discharges allowed by this General Permit shall not cause or contribute to violations of Water
Quality Standards.
This permit does not relieve the permittee from responsibility for compliance with any other
applicable federal, state, or local law, rule, standard, ordinance, order, judgment, or decree.
Part 1 Page 2 of 2

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL, RESOURCES - DIVISION OF WATER QUALITY
GENERAL PERMIT NO. NCG1400O0
TO DISCHARGE STORMWATER AND/OR PROCESS WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
Coverage under this General Permit is applicable to all owners or operators of establishments
classified as primarily engaged in ready -mixed concrete [Standard Industrial Classification
Code (SIC) 32731 and like activities deemed by DWQ to be similar in the process and/or the
exposure of raw materials, products, by-products, or waste materials.
Discharges covered under this permit are:
• Stormwater point source discharges (including discharges from on -site vehicle
maintenance areas), and
• Authorized process wastewater discharges.
The following activities are specifically excludgd from coverage under this
General Permit:
• Disposal of wastewater not specifically designated in this permit.
• Disposal of any concrete directly into stormwater conveyances, storm sewer outfalls,
wetlands, and/or into any waters of the state.
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission and the Federal Water Pollution Control Act, as amended, this permit
is hereby issued to all owners or operators, hereafter permittees, which are covered by this
permit as evidenced by receipt of a Certificate of Coverage by the Environmental Management
Commission to allow the discharge of stormwater and process wastewater to the surface
waters of North Carolina or separate storm sewer systems conveying stormwater to surface
waters in accordance with the terms and conditions set forth herein.
The General Permit shall become effective on July 1, 2011.
The General Permit shall expire at midnight on June 30, 2016.
Signed this day June 24, 2011.
Ori inal Si ned by Matt Matthews
for Coleen H. Sullins, Director
Division of Water Quality
By the Authority of the Environmental Management Commission

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES - DIVISION OF WATER QUALITY
GENERAL, PERMIT NO. NCG140000
TO DISCHARGE STORMWATER AND/OR PROCESS WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
Coverage under this General Permit is applicable to all owners or operators of
establishments classified as primarily engaged in ready -mixed concrete [Standard
Industrial Classification Code (SIC) 32731 and like activities deemed by DWQ to be
similar in the process and/or the exposure of raw materials, products, by-products, or
waste materials.
IMPORTANT CHANGES & GUIDANCE
December 8, 2011:
In response to Section 9 of Session Law 2011-394, NCDWQ will not implement some of the
Authorization to Construct requirements in the current version of the permit, DWQ will
revise the printed text of the General Permit to be consistent at the next scheduled renewal
period. Specifically:
a. Note that permit requirements in Part 11, Section A, numbers 1-5, and Part Il, Section
B, number 1 are no longer valid per NC Session Law 2011-394.
b. However, note that Part I1, Section A, number 6, and Part 11, Section B, numbers 2-10
are unaffected by this Session Law,
c, Your facility must notify the appropriate DWQ Regional Office at least 72 hours in
advance of operation of your wastewater treatment facility.
d. Other DWQ supporting documentation (other than the permit) will be amended to
reflect these changes.
1�
5
iJ•��Z
I y P 0 CRS I n1 u u STCL r '%L -

Benton Ready : Mlx of Brunswick
HYDROLOGY & HYDRAULIC
CALCULATIONS
SECTION I
"PRE" & "POST" Development Conditions
SECTION lI
STORMWATER POND
SECTION III
EROSION CONTROL
September 2008
'a 4 �........... �h
�1 �C
a I D `+ •
5
Compass Pointe Engineering, PA J
Ocean Isle Peach, NC

SECTION I
"PRE" & "POSTT' Development Conditions

,4 �� �_ Y=+ti.. 'sf'�.. Rr L.N ` 1 :JL t"•..a S� c C�1 �� .
r,
}/ A i4A.t ,. ,� ;� G � ► �t.,u, /yam; f a l: ..S �' EEO f i �. '7, .V f!t
V.r L L'� v ate- `r. t 4,140)(, 75)
�--

Formula
1=ueul/aiue
0.75-0.95
2%
0.05-0.10
'age, 2-7%
0.10-& 15
tp_ 7%
0,15-0.20
2%
0.13-0.17
rage, 2-7%
0.18-0.22
'p, 7%
0.25-0.35
0.30-0.60
0.20-0.50
rap
0.30-0.60
crop
0.20-0.50
rop
0.20-0_40
crop
0.10-0.25
0.15-0.4 5
0.05-0.25
0.05-0.25
C value within the range for
soils, flat slopes,
and dense
4cywly permeable
soils, steep
es.
stimation of the pre -
ion (Tc) and peak
Town.

Hydrograph Return Period Recap wydraSlowHydrographsbyintelisolvev9.23
Hyd.
Hydrograph
inflow
Peak Outflow (cfs)
Hydrograph
No.
type
Hyd(s)
description
(origin)
1-Yr
2-Yr
3-Yr
5-Yr
10-Yr
25-Yr
50-Yr
100-Yr
1
Rational
---
3.982
-- — ---
- — _
7.375
__
_____
19.06
PRE Conditions
2
Rational
--
8.761
— — —
---
16.23
—
---
41.92
POST without Storage
3
Mod. Rational
----
4.930
--
---- -
9.343
--
----
21.34
POST Modified for Routing
4
Reservoir
3
0.000
-- — ---
i
-- ---
5.212
f
�
--
------
I
I
I
10.48
POST Routed 0
Proj. file: Benton POST Routed 8-25-08.gpw
Tuesday, Aug 26, 2008

Hydrograph Summary Report HydraflowHydrographsbylntelisolvev9.23
Hyd.
No.
Hydrograph
type
(origin)
Peak
flow
(cfs)
Time
interval
(min)
Time to
peak
(min)
Hyd.
volume
(tuft)
Inflow
hyd(s)
Maximum
elevation
(ft)
Total
strge used
(tuft)
Hydrograph
description
1
Rational
3.982
1
5
1,195
--
--
—
PRE Conditions
2
Rational
8.761
1
5
2,628
—
—
---
POST without Storage
3
Mod. Rational
4.930
1
5
14,493
-
— -
— -
POST Modified for Routing
4
Reservoir
0.000
1
nla
0
3
41,90
14,493
POST Routed 0
Benton POST Routed 8-25-08.gpw
Return Period: 1 Year
Tuesday, Aug 26, 2008

3
Hydrograph
Report
Hydraflow Hydrographs by Intelisolve v9.23
Tuesday, Aug 26, 2008
Hyd. No. 1
PRE Conditions
Hydrograph type
= Rational
Peak discharge
= 3.982 cfs
Storm frequency
= 1 yrs
Time to peak
= 5 min
Time interval
= 1 min
Hyd. volume
= 1,195 cuft
Drainage area
= 5.900 ac
Runoff coeff.
= 0.25
Intensity
= 2.700 in/hr
Tc by User
= 5.00 min
OF Curve
= EC Manual DMC 6-14-08.pcp.IDF
Asc/Rec limb fact
= 1/1
Q (cis)
4.00
R 11
2.00
1.00
0.00 -M
0
1 2
Hyd No. 1
PRE Conditions
Hyd. No. 1 -- 1 Year
0 (cfs)
4.00
3.00
2,00
1.00
WATATI�
3 4 5 6 7 8 9 10
Time (min)

Hydrograph Report
4
Hydraflow Hydrographs by Intelisolve v9-23
Tuesday. Aug 26, 2008
Hyd. No. 2
POST without Storage
Hydrograph type = Rational
Peak discharge
= 8.761 cfs
Storm frequency = 1 yrs
Time to peak
= 5 min
Time interval = 1 . min
Hyd. volume
= 2,628 cult
Drainage -area = 5.900 ac
Runoff coeff.
= 0.55
Intensity = 2.700 in/hr
Tc by User
= 5.00 min
IDF Curve = EC Manual DMC 6-14-08.pcp.IDF
Asc/Rec limb fact
= 1/1
Q (cfs)
10.00
: �e
. M
4.00
2.00
0.00
0
POST without Storage
Hyd. No. 2 1 Year
/
F
... ...... .......
.1 . 2
Hyd No. 2
3 4 5 6 7 8
Q (cfs)-
10.00
4.00
2.00
0.00
9 10
Time (rain)

Hydrograph Report
Hydraflow Hydrographs by Intelisolve v9.23
Hyd. No. 3
POST Modified for Routing
Hydrograph type
= Mod. Rational
Storm frequency
= 1 yrs
Time interval
= 1 min
Drainage area
= 5.900 ac
Intensity
= 1.519 in/hr
IDF Curve
= EC Manual DMC 6-14-08.pcp.)DF
Target Q
= 4.000 cfs
Q (cfs)
5.00
4.00
K KI
2.00
fi[�I�l
Tuesday, Aug 26, 2008
Peak discharge = 4.930 cfs
Time to peak =
5 min
Hyd. volume =
14,493 cuft
Runoff coeff. =
0.55
Tc by User =
5.00 min
Storm duration =
9.8 x Tc
Est. Req'd Storage=
7,926 cuft
POST Modified for Routing
Hyd. No, 3 -- 1 Year
-
0 (Cfs)
5.00
Keel,
3.00
2.00
1.00
dabs
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54
Time (min)
Hyd No. 3 Ill E )1 1 Mod. Rational Est. Storage = 7,926 cult

Hydrograph Report
Hydraflow Hydrographs by Intelisolve v9.23
Hyd. No. 4
POST Routed Q
Hydrograph type
= Reservoir
Storm frequency
= 1 yrs
Time interval
= 1 min
Inflow hyd. No.
= 3 - POST Modified for Routing
Reservoir name
= Benton SW Pond
Storage Indication method used.
Q (cfs)
5.00
400
3.00
aiII
1.00
In
POST Routed Q
Hyd, No. 4 -- 1 Year
6
Tuesday, Aug 26, 2008
Peak discharge = 0.000 cfs
Time to peak
= nfa
Hyd. volume
= 0 cuft
Max. Elevation
= 41.90 ft
Max. Storage
= 14,493 cuft
Q (cfs)
5.00
4.00
3.00
2.00
1.00
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54
Time (min)
Hyd No. 4 Hyd No. 3 - fMi i i Total storage used = 14,493 cuft

Pond Report
7
Hydratiow Hydrographs by Intelisolve v9.23
Tuesday, Aug 26, 2008
Pond No. 1 - Benton SW Pond
Pond Data
Contours • User -defined contour areas. Average end
area method.
used for volume calculation. Begining Elevation =
41,00 ft
Stage I Storage Table
Stage (ft) Eievation (ft) Contour
area (sgft)
Incr. Storage (tuft)
Total storage (tuft)
0.00 41.00
13,399
0
0
0,50 41.50
16,908
7,577
7,577
i.00 42.00
17,988
8,724
16,301
1.20 42.20
18,428
3,642
19,942
2,00 43.00
20,202
15,452
35,394
3.00 44.00
22,467
21,335_
56,729
.4,00 45.00
24,794
23,631
80,359
Culvert I Orifice Structures
Weir Structures
[Al [B]
[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)
= 42.20 0.00
0.00
0.00
No. Barrels = 1 0
0
0
Weir Coeff.
= 3.33 3.33
3.33
3.33
Invert Et. (ft) = 39.00 0.00
0.00
0.00
Weir Type
= Rect ---
-
-
Length (ft) = 250.00 0.00
0.00
0.00
Multi -Stage
= Yes No
No
No
Slope (%) = 0.44 0.00
0.00
n/a
N-Value = .013 .013
.013
n/a
Orifice Coeff. = 0.60 0.60
0.60
0.60
Exfil.(in/hr)
= 0.000 (by Wet area)
Multi -Stage = n/a No
No
No
TW Elev. (ft)
= 0,00
Note: GulveNprifne ow tows are analyze@ onder inlet (K) and outlet (oci control. Weir riser$ rheched for orifice conditions (ic) and submergence (s).
Stage (ft)
4.00
3.00
2.00
M
n ©o
Stage I Discharge
Elev (ft)
45.00
44.00
43.00
42.00
4100
0.00 1.00 2.00 3,00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12,00 13.00 14.00
Total Q Discharge (cfs)

Hydrograph Summary Report HydraflowHydrographsbylntelisolvev9.23
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
(cuft)
Hydrograph
description
1
Rational
7.375
1
5
2,213
— -
--
--
PRE Conditions
2
Rational
16.23
1
5
4,868
—
—
,-•
POST without Storage
3
Mod. Rational
9.343
1
5
27,468
----
-
---•
POST Modified for Routing
4
Reservoir
5.212
1
51
7,524
3
42,46
24,891
POST Routed Q
E
1
I
i
I
I
Benton POST Routed 8-25-08.9pw
Return Period: 10 Year
Tuesday, Aug 26, 2008

9 I-r�
Hydrograph Report
Hydraflow Hydrographs by Intelisoive v9.23
Tuesday, Aug 26. 2008
Hyd. No. 1
PRE Conditions
Hydrograph type
= Rational
Peak discharge
= 7.375 cfs
Storm frequency
= 10 yrs
Time to peak
= 5 min
Time interval
= 1 min
Hyd. volume
= 2,213 cult
Drainage area
= 5,900 ac
Runoff coeff.
= 0.25
Intensity
= 5.000 inlhr
Tc by User
= 5.00 min
OF Curve
= EC Manual DMC 6-14-08.pcp.IDF
Asc/Rec limb fact
= 1/1
Q (cfs)
8.00
4.00
2.00
PRE Conditions
Hyd. No. 1 --10 Year
Q (cfs)
8.00
4,00
WA#11 •
0.00 I/ 1 _.. 1 ..,_ 1 _ f 1 1 1 Jr -- N 0.00
0 1 2 3 4 5 6 7 8 9 10
. Hyd No. 1 Time (min)

Hydrograph Report
Hydraflow Hydrographs by Inteiisolve v9.23
Tuesday, Aug 26, 2008
Hyd. No. 2
POST without Storage
Hydrograph type = Rational
Peak discharge
= 15.23 cfs
Storm frequency = 10 yrs
Time to peak
= 5 min
Time interval = 1 min
Hyd. volume
= 4,868 cult
Drainage area = 5.900 ac
Runoff coeff.
= 0.55
Intensity = 5.000 inlhr
Tc by User
= 5.00 min
IDF Curve = EC Manual DMC 6-14-08.pcp.1DF
Asc/Rec limb fact
= 111
Q (cfs)
18.00
15.00
12.00
9.00
6.00
911111
am
POST without Storage
Hyd. No. 2 --- 10 Year
Q (cfs)
18.00
.' 5.00
12.00
w
win
owlim
0 1 2 3 4 5 6 7 8 9 10
Time (min)
Hyd No. 2

Hydrograph
Report
Hydraflow Hydrographs by fntelisolve v9.23
Tuesday, Aug 26, 2008
Hyd. No. 3
POST Modified for Routing
Hydrograph type
= Mod. Rational
Peak discharge =
9.343 cfs
Storm frequency
= 10 yrs
Time to peak =
5 min
Time interval
= 1 min
Hyd. volume =
27,468 cult
Drainage area
= 5.900 ac
Runoff coeff. =
0.55
Intensity
= 2.879 in/hr
Tc by User =
5.00 min
IDF Curve
= EC Manual DMC 6-14-08.pcp.1DF
Storm duration =
9.8 x Tc
Target Q
= 7.400 cfs
Est. Req'd Storage=
15,295 cult
POST Modified for Routing
Q (cfs) Hyd. too. 3 -- 10 Year a (Cfs)
10.00
8.00
6.00
4.00
2.00
0 00
10.00
8.00
6,00
4.00
2.00
0.00
0 2 4 6 8. 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54
Time (min)
Hyd No. 3 L ..t..' 1i + Mod. Rational Est. Storage = 15,295 cult

Hydrograph Report
12
HydraFlow Hydrographs by Intelisolve v9.23
Hyd. No. 4
POST Routed Q
Hydrograph type
= Reservoir
Storm frequency
= 19 yrs
Time interval
= 1 min
Inflow hyd. No.
= 3 - POST Modified for Routine
Reservoir name
= Benton SW Pond
Storage Indication method used.
Q (cfs)
10,00
f: O R
M
4.00
2.00
0.00
0 20
Hyd No. 4
POST Routed Q
Hyd. No_ 4 -- 10 Year
40 60
Hyd No. 3
Tuesday, Aug 26, 2008
Peak discharge = 5.212 cfs
Time to peak = 51 min
Hyd. volume = 7,524 cult
Max. Elevation = 42,46 ft
Max. Storage = 24,891 cuft
80 100 120 140
Total storage used = 24,891 cuff
Q (cfs)
10.00
8.00
. We
4,00
2.00
0.00
160
Time (min)

Q
_�
Is
13
Hydrograph Summary Report
Hydraflow Hydragraphs 6y Intelisatve v9.23
Hyd.� Hydrograph
No. 3 type
(origin)
Peak
flow
(cfs)
Time
interval
(min)
Time to Hyd.
peak volume
(min) I (tuft)
Inflow ;
hyd(s)
I Maximum
I elevation
(ft)
I Total
strge used
(cuff)
Hydrograph
description
1
Rational 19.06
1
5
5,717
--
---
I PRE Conditions
2
Rational 41.92
1
5
12.577
—
--
I
POST without Storage
3
Mod. Rational 21.34
1
5
39,044
-
I ---
..-
POST Modified for Routing
4
Reservoir 10.48
i
I
i
1
I 33
18,460
'
3
�
42.79
I
31,320
POST Routed Q
I
I
I
�
i
f �
Benton POST Routed 8-25-08-gp
Return Period: 100 Year
Tuesday, Aug 26, 2008

14 ci4
Hydrograph
Report
Hydraflow Hydrographs by Intelisolve v9.23
Tuesday, Aug 26, 2008
Hyd. No. 1
PRE Conditions
Hydrograph type
= Rational
Peak discharge
= 19.06 cfs
Storm frequency
= 100 yrs
Time to peak
= 5 min
Time interval
= 1 min
Hyd. volume
= 5,717 cult
Drainage area
= 5,900 ac
Runoff coeff. -
= 0.25
Intensity
= 12.919 inlhr
Tc by User
= 6.00 min
OF Curve
= EC Manual DMC 6-14-08.pcp.IDF
Asc/Rec limb fact
= 1/1
Q (cis)
21.oa
18.00
15.00
12.00 .
9.00
6.00
3.00
(I 00
0 1 2
Hyd No., 1
PRE Conditions
Hyd. No. 1 -- 100 Year
Q {cfs)
21.00
18.00
15.00
12.00
9.00
6.00
3.00
n. nn
3 4 5 6 7 8 9 10
Time (rain)

15 Z—t�
Hydrograph Report
Hydraflow Hydrographs by Intefisolve v9.23
Tuesday, Aug 26, 2008
Hyd. No. 2
POST without Storage
Hydrograph type = Rational
Peak discharge
= 41.92 cfs
Storm frequency = 100 yrs
Time to peak
= 5 min
Time interval = 1 min
Hyd. volume
= 12,577 cuff
Drainage area = 5,900 ac
Runoff coeff.
= 0.55
Intensity = 12.919 inlhr
Tc by User
= 5.00 min
IDF Curve = EC Manual DMC 6-14-08.pcp.IDF
Asc/Rec limb fact
= 1/1
Q (cfs,'
50.00.
40.00
30.00
20.00
o.00
0 1
Hyd No. 2
POST without Storage
Hyd, No. 2 -- 100 Year
2 3 4 5 6 7 8 9
Q (cfs)
50.00
40.00
30.00
20,00
10.00
o.on
10
Time (min)

16 �
Hydrograph Report
Hydraflow Hydrographs by Intelisofve v9.23 Tuesday, Aug 26, 2008
Hyd. No. 3
POST Modified for Routing
Hydrograph type
= Mod.. Rational
Peak discharge =
21.34 cfs
Storm frequency
= 100 yrs
Time to peak =
5 min
Time interval
= 1 min
Hyd. volume =
39,044 cuff
Drainage area
= 5.900 ac
Runoff coeff. =
0.55
Intensity
= 6.575 in/hr
Tc by User =
5.00 min
IDF Curve
= EC Manual DMC 6-14-08.pcp.IDF
Storm duration =
6.1 x Tc
Target Q
= 19.00 cfs
Est. Req'd Storage=
18,174 cult
Q (cfs)
24.00
20.00
16.00
12.00
: ��
4.00
mal
POST Moclified for Routing
Hyd. No.'3 — 100 Year
t i i
� iII III I I�i;�I,
Q (cfs)
24.00
20.00
16.00
12.00
m
4.00
0 2 4 6 8 10 12 14 16 18 20 22 24' 26 28 30 32 34 36
Time (min)
Hyd No. 3 1 i j k �_f i Mod. Rational Est. Storage = 18,174 cuff

Hydrograph Report
E�
17 �
Hydraflow Hydrographs by Inteiisorre v9.23
Hyd. No. 4
POST Routed Q
Hydrograph type
= Reservoir
Storm frequency
= 100 yrs
Time interval
= 1 min
Inflow hyd. No.
= 3 - POST Modified for Routing
Reservoir name
= Benton SW Pond
Storage Indication method used.
Q (cfs)
24.00
20.00
16.0❑
12.00
M
4.00
WiTfill
POST Routed Q
Hyd, No. 4 -- 100 Year
Tuesday. Aug 26, 2008
Peak discharge = 10.48 cfs
Time to peak
= 33 min
Hyd. volume
= 18,460 cult
Max. Elevation
= 42.79 ft
Max. Storage
= 31,320 cuft
Q (Gfs)
24.00
20.00
16.00
12.00
8W
4.00
NUAWITIiIIIIIIIIIIIIIIIIIII
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140
Time (rein)
Hyd No. 4 Hyd No 3 :'. Total storage used = 31,320 tuft

Hydraflow Rainfall Report
Hydraflow Hydrographs by Intelisolve v9.23
Return I Intensity -Duration -Frequency Equation Coefficients (FHA
j Period
(Yrs) S D E i� (NIA) E
1-�
- 51026430000
4.4955 i µ--- '
I
.000MII7.4102
-
i z
o.DDoo
n-DooD
0.0000 ------ '
j 3 I
0.0000
0.0000
0.0000 j
f 5
i 0.0000
0.0000
0.0000
10
39801970000001,000
000
0.0000.7014 I ---- f
25
0.0000
0.0000
0.0000 -_--
' S0
0.0000
0.0000
0,0000 ----
100
i 74.7444
j
9.3000
0.6599 !I _ _-
!; I
File name! EC Manual OMC 6-14-08.pcp.iDF
Intensity,-- B 1(Tc + D)"E
Tuesday, Aug 26, 2008
Return �
--
-----
Intensity
Values
(inlhr)---------
--�
Period !
(Yrs) } 5 min I
-
10 15
20
25
30
7
35 I` 40 45
so
55
----I
60
I
1
1 2.70 I
2.52 2.35
2.20
2.06
1.93
1.81 1.70 1.60
1.50
1.41
1.33
y
f
2 0.00
! 0.00 0.00
C.00
0.00
O.OQ
0.00 ! 0.00 0.00
j
0.00
0.00
0.00
I
3 I 0.00
I
0.00 0.00
0.00
0.00
I OAO
4.00 I D.DO 0.00
0.00
0.00
0-00
i
5 0.00
I 0.00 0.00
0.00
0.00
0.00
0.00 I 0.00 0.00
0.00
0.00
0.00 I
! 10 ! 5.00
I 4.69 j a.40
i
4-13
3.88
3.64
i 3.42 { 3.22 1 3.02
2.a4
2.68
I 2.52
25 0.00
OAO 0.00
0.00
0.00
0.00
i I
0.00 I 0.00 ` 0.00
0.00
0.00
� 0.00
i
I
50 i 0.00
1 0.00 I 0.00
0-00
0.00
11.10
0.00 0.00 0.00
0.00
i 0.00
' 0.00
! ,
100 � 12.92
I
�10.60 IL 9.11
I
6.05
7.25
6-E3
I
�- 6.13 f 5.71 ( 5.36
5.05
4.79
� 4-56
J-
Tc = time in minutes. Values may exceed 60.
Precip. file name: EC Manual DMC 6-14-07
Rainfall Precipitation Table (in)
Storm-.�----
Distribution T 1-yr j 2-yr
3-yr
�
5-yr
-- - -T
1D-yr 25-yr' E 50-yr
r-�
100-yr '
I
SCS 24-hour ! 3.70 0.00
i 0.00
0.00
[
7.00 0.00 11.00
12.92
SCS 6-Hr I 0.00 0.00
II 0.00
I 0.00
0.00 0.00 I 0.00
o.00 I`1{rI
i f{
I Huff-1 st 0.00 0.00
1
I 0.00
0.00
! t
0.00 i 0.00 0.00 j
0.00
Huff-2nd 0.00 0-00
I 0.00
0.00
0.00 I 0.00 ! 0.00
0.00
I
Huff-3rd I 0.00 { 0.00
0.00
0.00
I
0.00 I 0.00 I 0.00
0.00
Huff-4th 000 i 0.00
0.00
0.00
I I
0.00 10.00 O.Do
O.00
Huff-Indy 0.00 10.00
0.00
2.75
400 I 5.38 6.50
I 8.00
I Custom 0.00 0.00
0.00
0,00
0.00 0.00 0.00
0.00
I -J_. I
---. L r__

oy-
STORMWATER RUNOFF
Project: Benton Concrete Designer: DMC
Basin t D; (only one) Date: 8/26/2008
i
Given
TOTAL DRAINAGE AREA: 257000 SF - 5.900 AC.•
BUA:
Gravel RoadwayfParking
134000-SF -
3.076 AC.
Buildings/Structures etc.
6700 SF =
0.154 AC.
Washdown/Reclaim Facility
4000 SF =
0.092 AC.
OtheriContingency
4000 SF =
0.092 AC.
TOTALS
148700 SF =
3.414 AC.
DESIGN RAINFALL DEPTH: 1.5 INCHES
Calculations
BUA / DA: 0.579
"R" VALUE: 0.571
VOLUME OF RUNOFF: 18335 CF
PERMANENT POOL AVERAGE DEPTH: 4 FT
85% OR 90% TSS REMOVAL.? 90
SA / TDA from TABLE 5.09%
REQUIRED MINIMUM SURFACE AREA OF 13081 SF
PERMANENT POOL
Compass Pointe Engineering, PA DMC
Ocean isle Beach, NC 8126/08

NCDENR Stormwater BMP Manual Chapter Revised 09-28-07
Table 10-4
Surface Area to Drainage Area Ratio for Permanent Pool Sizing to Achieve 90 Percent TSS
Pollutant Removal Efficiency in the Coastal ,Region, Adapted from Driscoll,.1986
Percent
Impervious
Cover
3.0
3.5
4.0
Permanent Pool Average Depth (ft)
4.5 5.0 5.5 6.0
6.5
7.0
7.5'
10%
1.3
1.0
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
20%
2A
10
1.8
1.7
1.5
1.4
1.2
1.0
0.9
0.6
30%
3.5
3.0
2.7
2.5
2.2
1.9
1.6
1.3
1.1
0.8
40%
4.5
4.0
3.5
3.1
2.8
2.5
2.1
1.8
1.4
1.1
50 %
5.6
5.0
4.3�7,09 3.9
3.5
3.1
2.7
23
1.9
1.5
60%
7.0
6.0
53.
4.8
4.3
3.9
3.4
2.9
2.4
1.9
70%
8.1
7.0
6.0
5.5
5.0
4.5
3.9
3.4
2.9
2.3
80%
9.4
8.0
7.0
6.4
5.7
5.2
4.6
4.0 -
3.4
2.8
9070
10.7
9.0
7.9
7.2
6.5 •
5.9
5.2
4.6
3.9
3.3
100°70,
12
10.0
8.8
8.1
7.3
6.6
5.8
5.1
4.3
3,6
The engineering design of a wet detention basin must include a 10-foot-wide: (minimum)
vegetated shelf around the full perimeter or the basin. The inside edge of the shelf shall
be no deeper than 6" below the permanent pool level, and the outside edge shall be 6"
above the permanent pool level_ For a 10' wide shelf, the resulting slope is 10:1. With
half the required shelf below the water (maximum depth of 6 inches), and half the
required shelf above the water, the vegetated shelf will provide a location for a diverse
population of emergent wetland vegetation that enhances biological pollutant removal,
provides a habitat for wildlife, protects the shoreline from erosion, and improves
sediment trap efficiency. A 10' wide shelf also provides a safety feature prior to the
deeper permanent pool.
.Short-circuiting of the stormwater must be prevented. The most direct way of
minimizing short-circuiting is to maximize the length of the flow path between the inlet
and the outlet: basins with long and narrow shapes can maximize the length of the flow
path. Long and narrow but irregularly shaped wet detention basins may appear more
natural and therefore may have increased aesthetic value. If local site conditions prohibit
a relatively long, narrow facility, baffles may be placed in the wet detention basin to
lengthen the stormwater flow path as much as possible. Baffles must extend to the
temporary pool elevation or higher. ;A minimum length -to -width ratio of 1.5:1 is
required, but a flow path of at least 3:1 is recommended. Basin shape should minimize
dead storage areas, and where possible the width should expand as it approaches the
outlet.
Although larger wet detention basins'typically remove more pollutants, a threshold size
seems to exist above which further improvement of water quality by sedimentation is
negligible. The water treatment volume within a wet detention basin'is calculated as the
total volume beneath the permanent pool water level, and above the sediment storage
volume, including any such volume within the forebay.
Wet Detention Basin 10-10 July 2007

D_2
WET DETENTION POND DRAWDOWN CALCULATIONS
Project Name: Benton Concrete
Designer: DMC Date: 8/26/2008
GIVEN. Calculated Volume of Runoff from 1 112" Rainfall 18335 cf
Minimum Permanent Pool Surface Area Required 13081 sf
Actual Permanent Pool Surface Area Provided 13322 sf
Elevation of Permanent Pool 41 ft MSL
Surface Area of SW Storage (Temporary) Pool 18428 sf
Elevation of SW Storage (Temporary) Pool 42.2 ft MSL
Orifice C Factor 0.6
Size of Orifi 2 32 in. (ID of 2 1/2" Sch
80 PVC)
Time tnerement for Routing 2 hours
CALCULATED: Area of Orifice 0.0293 sf
Depth Between Permanent Pool and SW Storage Pool 12 ft
Volume Between Permanent Pool and SW Storage Pool 19940 cf
Ratio of Approximate Volume to Required Volume 1.09
R
0 t1 T I
N G T A 6
L E
Time (hours
I �Head
Elevation
Volume
Above�
OrikeQ I
Volume thru
from
(ft. MSL)
Stored (cf)
Orifice (It.)
(Cis)
Orifice (OP
drawdown)f
T2 1
0.1548 _1114�
- 0-.i�.
42.2--j 19940
t2.13
18826 1
1.13
0.1504 1
1063
�- 4 I! 42.07 mm? 17743
I 1.07
0.1460 I
1051 -
_!
1.00 1
OA416
1020_
_�1.6692
- 8 _
1 41.94
1_ 5672
0.94 1
0.1372 1
_ 986
10
41.8E
' 14684
1 0-88
0.1328
956
- 12--_i.__
_
41.83
i3728
_
1 0.83 1
0,1284 I
925
_ 14 41.77 -
-_
; 12804
0.77 _1
0.1240 1
B93
16 _ ? 41.72
- 7
f 11911
'�
0.72 1OA
196 I
861
18
41.66
11050
0.66
_ 0.1152
829
2 41.62
10220
1 0.62 1
0.1108 1
22 T
41.57
i 9422 T
0.57 1,0.1054
1-
_798
76E3
_
24
1 41.52 _
1 8656
1 0.52 1
0.1020 r
�734
26
I 41.48 -_
l 7922 _
0.48 -i _
0.0975. 1
702
28 41.43
.•-_�_41.39
! 7220
_
I 0.43 1_0.0931
f
671
30
-16549
0.39 -�T
OA887-
b39
-_ _
41.36_
I 5911
0.36. 1
0.0843
_
_- 607 _
34
1 41.32
1 5304
1 0.32
0.0798 I
36
1 41_-28
1 4729
0.28 J-
t-
_575
543
38 _i
_
41.25
-
7 4187
0.25 I
_0.0754
0.0709 ;-
- 511
-_
- .40
_-_
-
41.22
3676
_ 0.22�
0,0665 1
478
42
_~1
1 41A9
i3190
_)
0.19
0.0521)
445
_-
J 44
41.t7
_
2751
_1
O.Z7 I,.
_j_
0.0575 1
4114
46
j 41,14
; 2337
0.14
-0,0530_1
382
48
_ _
1 41_12
1956
_
0.12 !
0,0485 ;
349
47.10
1 1607
0AO
0.0_439 1_...__
316__
-- 52
1 41A8
1_ t291
�0.08 .�
0.0394^i
283 _
54
41.06
1 i007
0.06_ t
0.034$ !
250
--_ 56
41.05 757
0.05 --'
0-0301 1
_
217
58
_
1 41,03_
_
r540
_
0.03• 1
0.0255 1
_ _
183
-� 60
' -41.02
! 356
_
0.0_2_ I
0.0207 T�
_
149
62
; 41,01
-- -207
_� _
0.0_1
0-0158
414
_••
_
-' 64 1 41,01 94
_ 0.01 !
0.0106
�76
66
41.00
17
0.00
OA046
33
Drawdown Time Approx. = 2.5 days.
Compass Pointe Engineering
Vlisteria Place DMC. 817108

Benton Concrete FOREBAY VOLUME COMPARED TO TOTAL VOLUME
DMIC, 9/22108
Elevation
(Ft
Main Pond
Main Pond Volume
( CF)
Fvrebay Surface
Foreba Volume
y
{ CF)
Description
MSLj
Surface
Area
(SF)
Area (SF)
Incremental
Accumulative
Incremental
Accumulative
(Sediment Storage)
33.0
I
(n1a)
(n1a)
- - _--. Bottom of Pond ._...;�
35.0
2,491
2,052
2,052
36.0
I
3,410
i • 2,951
5,002
1 1,060
i -
l
D
7
--3.0
4,367
-- _....
3,888 j
8,891
1321
1,191
1,191
--LL39.0
6,363 _
4,865
13,756
1,612
1,467
2,657W
6,392-
5,878
19,633_
1,930
9,77I
4,428_-
40.0
_v
7,450
_
0,921
26,554
2,217
2,074
6,502
Bottom of Vegetative Shelf
40.5
8,093
3,886
30,440 1
2,496
1,178 +_7,680
T
-Permanent Pool i
41.0
;
10,678
4,693
35,133
1_ 2,644
1,285 ;
8,965
Top of Vegetative_Shelf -_� -
-41_5
--i
13,343
_6,005 ---
41,138
2,862
1,377
10,341
TemporaryTempSrqry Pool
42.2
14,490 i
9,742
50,879 ;
3,176
2,113
12,455
POREBAY VOLUME 1 TOTAL VOLUME
@ PERMANENT POOL ELEVATION
0.20329499
Compass Pointe Engineering, PA
� ji

q—�)
Benton Concrete DMC 9/22/08
Computation of Porto Average Depth
New formula:
D avg. = .25 x 0+ A bot shelf/A perm pool) + (((A bot shelf + A bot pond)/2) x depth) )/ A bot shelf
Where: "A bot shelf' includes main pond and forebay
"A perm pool" includes main pond and forebay
"A bat pond includes main pond only
DESIGN PERMANENT POOL AVERAGE DEPTH (FT.)
4
FT.
MINIMUM PERMANENT POOL_ SURFACE AREA REQUIRED (SF)
13081
SF
MINIMUM STORAGE REQUIRED FOR RUNOFF FROM 1 1/2"
RAINFALL:
18335
CF
Area at the permanent pool elevation
13322
SF
Elevation of permanent pool
41.0
Feet
Area at the bottom of vegetative shelf
10589
SF
Elevation of the bottom of the vegetative shelf
40.5
Feet
Area at the bottom of the pond
1612
SF
Elevation at the bottom of the pond
34.0
Feet
Average Depth = 4.19 , Feet
Compass Pointe Engineering, P.A_
Ocean Isle Beach, NC

BENTON CONCRETE SEDIMENT BASIN DATA TABLE BASED ON CONSTRUCTION PERIOD OF PROJECT
Estimated
Minimum per EC Manual
Provided
Total Drainage
Disturbed Area
Construction
E 10
1. D.
Area {ac,)
During
Period Rational
{in.lhr.)
Q 10 (cfs)
Surface Area
Volume 1,800
@
Surface Area At To of
p
Volume Between To of
p
Construction
C Value
(SF) @ 435
CF per Distrubed
Overflow Weir Elevation_
Overflow Weir and
(ac.)
SFICFS
Acre (CF)
(SF)
Drawdown Elevation (CF)
Sw
! 5.90
5.90 j
0.30
9.70
17.2
7,469
10,620
18,428
19,943
BASIN
I
......................... Surface Area and Volume OK
Compass Pointe Engineering
Ocean isle Beach, NC
aMC
6/26/08

e - aml—Ce C-,')
A 2
fit 2.
0� SS
why
X-%
•(
DI
2.7
0.2
A u-
A
A2G
O'T S:
2zA
cc 4 c

Hydraflow PIan View
E3
A4:
A3
r.
Uuttall
Project File'. Benton Basins A & B 8-26-08.strn
7 Z
83
NoAines: 7 1 08-28-2008
Hydraflow Storm Sewers 2001

Storm Sever Inventory Report
Page 1
Line
Alignment
Flow Data
Physical Data
Line ID
No.
Dnstr
Line
Defl
Junc
Known
Drng
Runoff
Inlet
Line
Invert
Line
Line
N
J-loss
Inlett
line
length
angle
type
Q
area
coeff
time
slope
EI Up
size
type
value
coeff
Rim EI
No.
(ft)
(deg)
(cis)
(ac)
(C)
(min)M
FID
(ft)
(In)
(n)
(K)
(it)
I
0.013
1.50
44,00
SD-A1
1
End
40.0
-89,3
DrGrt
0.00
1.40
0.60
5.0
37.50
1.25
38.00 •
36
Cir
2
1
60.0
-2.3
DrGrt
0.00
0.20
0.55
5.0
40,00
1.67
41.00
18
Cir
0.013
1.05
45.50
SD-A2
3
2
110.0
-40.6
DrGrt
0.00
0.20
0.65
5.0
41.00
0.73
41.80
18
Cir
O.0i3
1.09
46.00
SD-A3
4
3
60.0
42.7
DrGrt
0.00
0.80
0.55
5.0
41.80
0.67
42.20
15
Cir
0.013
1.00
45,20
SD-A4
5
1
290.0
91.6
DrGrt
0.00
1.70
0.65
5,0
38.00
0.45
39.30
30
Cir
0.013
1.09
43.20
SD-B1
6
5
50.0
42.9
DrGrt
0.00
0.20
0.45
5.0
39.50
1.00
40.00
18
Cir
0.013
1.47
43.20
SD-82
7
6
80.0
•77.2
DrGrt
I
0.00
I
0.80
0.50
5.0
40,00
0,63
40.50
15
Cir
0.013
1,00
43.50
SD-B3
File: Benton
Basins
A & B 8-26-08.stm
Number
of lines: 7
Date: 08-28-200
LProject
8
Hydrallow, Slo€m Sewers 20 5 I

Storm Sewer Summary Report
Page 1
Line
Line ID
Flow
Line
Line
Invert
Invert
Line
HGL
HGL � Minor
HGL
Dns
No.
rate
size
length
EL Dn
EL Up
slope
down
up loss
Junct
line
(Cfs)
(in)
lift)
(ft)
A
N
(ft)
(ft) ! lift)
!
lift}
No.
1
SD-A1
20.01
36 c
40.0
37.50
38.00
1.250
41.90'
41.94'
0,19
42.12
End
2
SD-A2
4.75
18 C
60.0
40.00
41.00
1.667
42.14
42.22
0.15
42.38
1
3
SD-A3
4.13
18 c
110.0
41,00
41.80
0.727
42.44
42.59
0.32
42.91
2
4
SD-A4
3.25
15 c
60.0
41.80
42.20
0.667
43.10
43,22
0.14
43,36
3
5
SD-61
11.24
30 c
290.0
38.00
39.30
0.448
42.17'
42.38'
0.09
42.47
1
6
St]-132
3.52
18 c
50.0
39.50
40.00
1.000
42.49'
42.55'
0,09
42.64
5
7
SD-B3
2A5
1
15 c
1
80.0
40.00
40.50
f 0.625
42.64'
42.81'
0,09
42.90
6
I
I
I
i
I
Project File: Benton Basins A & B 6-26-08.stm
Number of lines: 7 Run Date: 08-28-2008
NOTES: c = cir: e = ellip; b = box; Return period = 2 Yrs. ; 'Surcharged (HGL above crown).
I iydrallo Siorm Se -Ors 2005

Storm Sewer Summary Report
�-S
Page 1
Line
Line ID
Flow
Line
Line
Invert
Invert Line HGL
HGL
Minor
HGL
[ins
No.
rate
size
length
EL C)n
EL Up slope down
up
loss
Junct
line
(cfs)
(in)
(ft)
(ft) I
(ft) I M) (ft)
(ft)
(ft)
(ft)
No.
s
1 i
SD-A1
27.30
36 c
40.0
37.50
38.00 1.250 42.46'
42.53*
0.35
42.87 '
End
2
SD•A2
6.33
18 C
60.0
40.00
41.00 1.667 42.91*
43.13*
0.21
43.33
1
3
SD-A3
5.45
18 c
110.0
41.00
41.80 0.727 43.39*
43.68*
0.16
43.84
2
4
SD•A4
4.26
15 c
60.0
41.81)
42.20 0.667 43.84'
44.11*
0.19
44.29
3
5
SD-131
14.95
30 G
290.0
38,00
39,30 0448 42.96*
43.35*
0.16
43.50
1
6
SD-B2
4.66
18 C
50.0 •
39,50
40.00 1.000 43.54'
43.64*
0.16
43.80
5
7
SD-83
3.88
15 c
80.0
40.00
40.50 0.625 43.80*
44,09*
0.16
44.24
6
i
eAAr
l
r
(
Ij
a
i
E
Project File: Benton Basins A R B 8-26-08.stm Number of lines: 7 Run Date: 08-28-2008
--
NOTES: c = cir; e = ellip; b = box; Return period = 10 Yrs. ; "Surcharged (HGL above crown).
HydnOlow Starm Se are 2005

Hydraulic Grade Line Computations
Page 1
Line
Size
Q
downstream
Len
Upstream
Check
JL
Minor
coeff
loss
Invert
HGL
Depth
Area
Val
Vel
EGL
Sf
Invert
HGL
Depth
Area
Vel
Veld
EGL
Sf
Ave
Enrgy
elev
elev
head
elev
elev
elev
head
elev
Sf
loss
(in)
(cfs)
(ft)
A
(ft)
(spit)
(ft1s)
(ft)
(ft)
M)
(ft)
(ft)
(ft)
(ft)
(sgft)
(ftls)
(ft)
(ft)
M
N
(ft)
(K)
(ft) 1
1
36
20.01
37.50
41,90
3.00
7.07
2.83
0.12
42.02
0.090
40.0
38.00
41.94
3.00
7.07
2.83
0.12
42.06
0.090
0.090
0.036
1.50
0.19
2
18
4.75
40.00
42,14
1.50
1.77
2.69
0.11
42.25
0.205
60.0
41.00
42.22
1.22
1.54
3.08
0.15
42.37
0,206
0,205
0.123
1.05
0,15
3
18
4.13
41.00
42.44
1.44
1.74
2.37
0.09
42.53
0.135
110
41.80
42.59
0.79
0.94
4.37
0.30
42.89
0.518
0.327
0.359
1.09
0.32
4
15
3.25
41.80
43.10
1.25
1,23
2.65
0.11
43.21
0.253
60.0
42.20
43.22
1.02
1.07
3.02
0.14
43.36
0.254
0.254
0.152
1.00
0.14
5
30
11.24
38.00
42.17
2.50
4.91
2.29
0.08
42.25
0.075
290
39.30
42.38
2,50
4.91
2.29
0.08
42.47
0.075
0.075
0.218
1.09
0.09
6
18
3.52
39.50
42.49
1.50
1.77
1.99
0.06
42.55
0.113
50.0
40.00
42.55
1.50
1.77
1.99
0.06
42.61
0,112
0.112
0,056
1.47
0.09
7
15
2.95
40.00
42.64
1.25
1,23
2.41
0.09
42.73
0.209
80.0
40.50
42.61
1.25
1.23
2.41
0.09
42.90
0.209
0.209
0.167
1.00
O,09
c
Project File: Benton Basins A & B 8-26-OB.stm
Number of lines: 7
Run Date: 08-28-2008
Hydrallow Storr:, Sewers 2 05

Hydraulic Grade Line Computations
Page 1
Line
Size
. Q
Downstream
Len
Upstream
Check
JL
Mlnor
coeff
loss
Invert
HGL
Depth
Area
Vol
Vol
EGL
Sf
Invert
HGL
DepthIArea
vel
Vol
EGL
Sf
Ave
Enrgy
elev
elev
head
elev
elev
etev
head
elev
Sf
loss
!
(in)
(Cfs)
(ft)
(ft)
(ft)
(sgft)
(ft1S)
Rt)
(ft)
(°/u)
(ft)
(f#}
(ft)
(ft)
I (Sgft)
j (fus)
(it)
(ft)
(°Ys)
('/a)
(ft)
(lC)
(ft)
(1)
(2)
36
(3)
I (4)
37.50
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
(16)
7.07
(17)
(18)
(19)
(20)
(21)
(22)
(23)
(24)
1
27.30
42.46
3.00
7.07
3.86
0.23
42.69
0.168
40.0
38.00
42.53
3.00
3.66
0.23
42.76
0.168
0.168
0.067
1.50
0.35
2
18
6.33
40.00
42,91
1,50
1,77
3.58
0.20
43.11
0.364
600
41.00
43.13
1.50
1.77
3.58
0.20
43.32
0.364
0.364
0.218
1.05
0.21
3
18
5.45
41.00
43,39
1.50
1.77
3.08
0.15
43.53
0.269
110
41.80
43.68
1.50
1.77
3.08
0.15
43.83
0.269
0.269
0.296
1.09
016
4
15
4.26
41.80
43.84
1.25
1.23
3.47
0.19
44.03
0.436
60,0
42.20
44.11
1,25
1.23
3.47
0.19
44.29
0.436
0.436
0.262
1.00
0,19
5
30
14.95
38.00
42.96
2.50
4.91
3.05
0.14
43.11
0.133
290
39.30
43.35
2.50
4.91
3.04
0.14
43.49
0.133
0.133
0,385
1,09
0.16
6
18
4.66
39.50
43.54
150
1.77
2.64
0.11
43.65
0.197
50.0
40.00
43.64
1.50
1.77
2.64
0.11
43.75
0.197
0,197
0.098
1.47
0.16
7
15
3.88
40.00
43.80
1.25
1.23
3.16
0.16
43.95
0.360
80.0
40.50
44.09
1.25
1.23
3.16
0.16
44.24
0.360
0.360
0.288
100
0.16
i
Project File: Benton Basins A & B 8.26-08.stm Number of lines: 7 Run Date: 08-28-2008
~f
Hytlraflaw Storm Sewers 2 O5 ( r
V

Storm Sewer Profile
Proj, fife: Benton Basins A & B 8-26-OB stm
Elev. (ft)
59.00
- yC-1AP_
Grnd..IEI..44 W'' El 44.00k
Inv. El:'. 37-50"An -, El, 38,00ut
Inv..El. 40.00. In
54.00
49.00 _-__�-____!.._._f _--__ _ __
R& L
44.00
39-00 40.QLf -.36" @ 1.2516,
34.00
0 25 50
OU - 18" @ 1 67%
Sta 1 +001100
- Ln. 2
Sta 2*10.00 - W.
3 Sta 2+70.00 - Ln: 4
'Rim
_Rim.EI._4
50_
Rirn_�L.46.00_
EI, 45.20
1
Anv.-EL-41.00-Out
Anv.- EIA.1. 80-Out
Inv. El. 42-20 Out
._.Inv,_EI. 4.i.00-In-
Anv.-It _41.80..Jn_�
75 100 125 150 175 200
Reach(ft) -

Storm Sewer Profile
Proj. file: Benton Basins A & B 8-26-08.stm
Elev. (ft) -- - -
54.00 - T
S#a_4+60.00 - Ln; 7-Sta 0+ E00Ln: �Eka3*30.OD S 3�80:00 Lfi
_Gmdi ER644EE044.00 --- - Ri-EI.•-43:?CVRi •EI:-43:20 Rim d. 43.50 ---
Inv. EI,1�7.501M'00 Put - Inv..E1: 39.30r[i.uEl.-40.00'Oiat Inv: -El, 4,0.50 Out
f Inv. -El. 38.00 �In , -Inv. El.-39-500.Q;J E:-40;00-ln
50.00 -----
46.00 .I.... ------ - ---- -� _ __._:t-42.00
.
_ t
o,oLf 15" @ 0.63%
5 . Lf - 8" (0-1. ° _
290.0U - 30" cQ 0.45%
40.0 f-36"Q1.
i
38.00 - ..._._._ �.. _.._ _._. _�.._. _ - - .-.._....--......._.., ...._. ......
34.00
0 50 100 150 200 250 300 350 400 450 500
Reach (ft)
i
}iydraflow Storm Sewers 200
-�

Storm Sewer Profile
iF
T
Elev. (ft)
59-00 -F-- -
Sta 0-900M - W%H40.00 - Ln: 1 Sta 1+00J00 - Ln. 2
i I Grnd. lEl. 44.59im -EL 44.00r� -Rim EL 45.50
Inv. Ei 37.56 hnv:El. 38.00.put Anv...ElAi.00 Out
I Inv.!. El. 40.00 In Inv. El. 41.00 In
54.00
49.00
44.00
1100U'18"� 0,73-1.
I 4V
11Q.0U 18-1 @ 0,739)6
T6 0 0 L f - 1 Sr" (@ 1 . 6 77 9116
39.00 !40.OLf - M' "12 5'k 1
34.00
0 25 50 75 100 125 150 176
Reach (ft)
Proj. file. Benton Basins A & 6 8-26-08-stm
QLa t- [V.VW - L_
.-Rim-El. 46.00
Anv.#.41.80 0
Inv. EL 41.80 In
to 2+70,00 - Ln: 4
im El. 45.20
v. El. 42.20 Out
6q.Mf - 15' @ 0.6
Ii
200 225 250 275
r I I
Hydraflow Storm Sewers 20
,ZXF

Storm Sewer Profile
F
Elev. (ft)
Proj. file: Benton Basins A & 8 8-26-08.stm
54.00 ---1-
3580.00 - Ln: 6 Sta 4+60.00 - Ln- 7
Sta O+MaOO+4DLM1ILn: 1
1'6r-ndl. ERiM�EM4-00� Rirr El. 43.2QR!rr -El. 43;20 1 Rim El. 43.50
Inv, 121.16,7-0.138.00,0ut -Inv.'EI- 39.-PrOUIEI. 40.00.0t t Inv. El. 40.50 Out
'Inv. El. 38.00 In Inv. El. 39Mrlu, EL 40.00-In
50.00
46,00 LT
A
42,00
5C.1bu - @ 2901,OU - 30" @10.45%
40.0-f - 36' @ 1 5
38.00 T--
34,00
0 50 100 150 200 250 300 350 400 450 500
Reach (ft)
Hydraflow Storm Sewers 200`a

Hydraflow Plan View
I
Out all
Benton Basin A5 to A6 No. Lines: 2 08-29-2008
Hydraflow Storm Sewers 200"

Storm Sewer Inventory Report
Page 1
Line
Alignment
Flow Data
Physical Data
Line ID
No.
strLine
Ti"
DO
Junc
Known
Drng
Runoff
inlet
Invert
Line
Invert
line
Line
N
J-loss
Inlet/
length
angle
type
4
area
coeff
time
EI Dn
slope
EI Up
size
type
value
coeff
Rim El
No.
(ft)
(deg)
(cfs)
(ac)
(C)
(min)
(ft)
(°/a)
(ft)
(in)
(n)
(K)
(ft)
1
End
70.0
-0.2
MH
0.00
0.00
0.00
0.0
46.60
0.29
46,80
12
Cir
0.013
0.99
49.60
SD-A5
2
1
40.0
-81.8
DrGrt
0.00
0.20
0.50
5.0
46.80
0.50 ,
47.00
92
Cir
0.013
1.00
48M
SD-A6
Benton Basin A5 to A6
Number of lines: 2
Date: 08-29-2008
Hytlrailow Storm Sowers 2 05
W

Storm Sewer Summary Report
Page 1.
r—
Line Line ID
Flow
Line
Line
Invert
Invert
Line
L
�0-n
HGL
Minor
HGL
Dns
No_
rate
size
length
EL Dn
EL lip
slope
up
loss
Junct
tine
(cfs)
(in)
(ft)
(ft)
Ott
N
(ftj
(ft)
(ft)
(ft)
I No.
I
1
SD-A5
0.95
12 c
70.0
46.60
46.80
0.286
47.01
47.36
0.07
47.42
End
2
SD-A6
I
0.97
12 c
40.0
46.80
47.00
0.500
47.47
47.50
0.09 '
47.60
1
i
i
i
Benton Basin A5 to A6
Number of lines: 2
Run Date: 08-29-2008
NOTES: c = cir; e = ellip; b = box; Return period = 10 Yrs.
Hydraflbw Storm Sewers 2005

Hydraulic Grade Line Computations
Line
Size
(in)
Q
(cfs)
Downstream
Len
(ft)
Upstream
Check
Invert
elev
(ft}
HGL
elev
(ft)
Depth
(ft)
Area
(sqft)
Vel
(ftls)
Vel
head
(ft)
EGL
elev
(ft)
Sf
N
Invert
elev
(ft)
HGL
elev
(ft)
Depth
(ft)
Area
(sgft)
Vel
(ftls)
Vel
head
(ft)
EGL
elev
(ft)
Sf
(%}
Ave
St
N
Enrgy
loss
(ft)
1
2
12
12
0.95
0.97
46.60
46.80
47.01
47.47
0.41
0.67
0.31
0.56
3.09
1.73
0.15
0.05
47.16
47.52
0.555
0.119
70.0
40.0
46.80
47.00
47.36
47.50
0.56
0.50
0.45
0.40
2.10
2.44
0.07
0.09
47.43
47.60
0.197
0.287
0.376
0.203
N
0.263
0.081
I
�
Benton Basin A5 to A8
Number of lines: 2
Run Date: 08-29-20
Page 1
JL Minor
coeff loss
(K) (ft)
0.99 FO07-
1.00
38
Hydrallow Storm Sewers

Storm Sewer Profile
Proj. fife: Benton A5 to A6 8-26-08.stm
2- YEl w /-s --) /fc
Elev. (ft)
59.00
- _ -�...- — -•
Sta 0+00.00 - Outfiall
��.._�
I I
Sta 1 + 10.00 - t_rr 2
T--0+70
Sta f 0- Ln: 1
Grnd. El. 51.60
I
!
- i
Rim EI; 49,60
i-
Rim El. 48.80
Inv EI.146.60 In
I
Inv. El. 46180 Out-
1 Irv. El. 47.00 Out
Inv. El. 46180 In
i
56.00
-- -
53.00
i
i
50,00
—40:AW - O.. 0
QUl.E-- �4ir!
44.00 ----�
0
10 20
30 40 50 60
70 80 90 100
110
Reach (ft)
Hydraftow Storm Sewers 2005

Storm Sewer Profile
Proj, Ne Benton A5 to A6 B-26-08.stm
A-S -> 4- '
Elev. (ft)
59.00-T----__._.� _ _
Sta 0*00.00 - Outfal! r -Sta 0.+_7,.0.00- 1.n,.1, Sta. 10.00 - Ln: 2
t Grnd. El. 51.60 I Rim-El.49:60 _ Rim EI. 4$.80
Inv. E,. 46.60 In ; -InV. EV'46 80-out"' Inv- " I. 47.00 Out
Inv. El. 46180 In -
i
56.00 - ----- --------- — -- - -- -- - __ - - -
00 ;
i
50.00
47.00
44.00
0 10 20 30 40 50 60
Reach (ft)
J f
f � 1
70 80 90 100 110
Hydraflow Storm Servers

A.
6e
-41 ve 14 LAC.c
f
A
2.9
A 2 A
p,
G� . C o
1. /. 7
0.E5
2.0 7
_5
E3. 11
1 i' Icy G.9
A IA a. l
A- I? o. ?�
r �4 o, 52
h t

Benton Concrete SWALES DATA TABLE - ESTABLISHED GRASSED -LINED CHANNELS DMC 8/2812008
Swale Average
Velocity
l- D.
Slope In Most
Q 10 (cfsl
Type Channel Liner
Description of Channel to Use
ATlowod from
Manning's "n"
Velocity
Flow Depth
Critical Area
from Table 8.05a
Table 8.05a
Value
Actual (fps)
A
(FUFt)
(fps)
A1A
1 0.0091 5.0
I
I grass
0-5% slope; easily erodible;
Bermudagrass
5 0 0.068
1.4
1.1
j
1
I 0.0038 2.9
I
I
{ grass
0-5% slope; easily erodible;
5.0
0.091
0.7
1.2
A1B
l ;
i
Bermudagrass
0-5% easily erodible;-
A2A i 0.0053
1.7
grass
sloe
I 5.0
[
j 0.130
, 0.5 , 1.1
I
iBermudagrass
; 0-5% slope; easily erodible;
j
R26 0.0145
}
! 2
i 7
grass
y Bermudagrass
5-0
0.081
j
; 1.2 0-9
T
I
_
I
0-5% slope; easily erodible;
50
0.055
I 1.9 i 1.4
81 {W 0.0091
I 11
grass
Bermudagrass
B2A ! 0.0091
3.9
grass
0 5%slope; easily erodible;
5,0
0.076
I 1.2
Bermuda rass
9
1
� �
B2B 0.0333
1.3
grass
0-5% slope; easily erodible;
I I
5.0
0.097 i
1.2 J 0.6
I
Bermudagrass
1
I
I
Column Heading Notes: t. Channels are "V-shaped" with 3:1 side slopes
2. Manning's "n" value based on trial & error procedu re balancing HydroFlow computations with Fig, 8.05c of EC Manual using retardance class "0",
3. Time of concentration based on Kirpich equation with minimum value of 5 minutes.
4. Intensity taken trom EC Manual, p. 8.03.9 for Wilrington.
Special Note: Seed and fertilizer shall be applied immediately after construction of all ditches. Further, swales AIA, A28. B1, a2A, AND 132E shalt be protected by placement
of a protective liner immediately after Seeding and fertilizer application. (See "Temporary Swale Channel Liner Calculations".) Check dams will be placed at
intervals along the ditch line as shown on the project plans,
CompassPointe Engineering
Ocean Isle Beach, NC

4
Appendices
.5
.4
cz
CD
� .06
SLOT
.02
.l
Step 10. For grass -lined channels once the appropriate channel dimensions
have been selected for low retardance conditions, repeat steps 5 through 8 using
a higher retardance class, corresponding to tall grass. Adjust capacity of the
channel by varying depth where site conditions permit.
NOTE I: If design velocity is greater than 2.0 ft/sec., a temporary lining
may be required to stabilize the channel until vegetation is established.
The temporary liner may be designed for peak flow from the 2-yr storm.
If a channel requires temporary lining, the designer should analyze shear
stresses in the channel to select the liner that provides protection and
promotes establishment of vegetation. For the design of temporary liners,
use tractive force procedure.
NOTE 2: Design Tables —Vegetated Channels and Diversions at the end
of this section may -be used to design grass -lined channels with parabolic
cross -sections.
Step 11. Check outlet for carrying capacity and stability. If discharge velocities
exceed allowable velocities for the receiving stream, an oulletprotection struc-
t= will be TNUizcd (Table 8.05d, pg. 8.05.9j.
Sample problem 8.05a illustrates the design of a grass -lined channel.
MEMEN01111�oe�■r.r�s��
�
Longer than 37
.ss than
►�■�.�iu.���a
■�'111'�111\�\�
....I___�...__
W1.
Nib
So
among
MMMEN
WE
mom
0M®0
mom=
2 A ,6 .8 1.0 2 4 6 8 to 20
VR, Product of Velocity and Hydraulic Radius
Figure 8.05c Manning's n related to velocity, hydraulic radius, and vegetal retardance.
Note: From Sample Problem 8.05a multiply Vp x Hydraiulir. Radius (4.5x0,54=2.43), then enter the product of VR and extend a
straight line up to Retardance class 'D', next project a straight line to the let to determine a triafmanning's n.
i
Rev. 12r93
8,05.7

BENTON CONCRETE - TEMPORARY SWALE CHANNEL LINER CALCULATIONS (before
permanent vegetation established)
NOTES: 1 _ Analysis based on 2-year peak Q. DMC 8/29/2008
2. Channel side slopes = 3:1 or flatter,
BARE EARTH ...... N = .Q2 & PERMISSIBLE VELOCITY = 2.0 FPS
CHANNEL I.D.
02 (GFS)
CHANNEL
BARE EARTH
SLOPE "N" VALUE
(FTfFT)
FLOW
DEPTH
(FT.)
WETTED
FLOW
AREA (SF) PERIMETER
(FT.)
HYDRAULIC
RADIUS {FT.) VELOCITY(FPS)
LINER
REQUIRED?
AIIA
3.8 !
0.0091 0.02
0.640
1.23 L 4.05
0.304 { 3.1
YES
Al B
2.2
i- 0.0038 Q02
0.510
1.12 3.86
0.290 2.0
NO
A2A i
1.3 I 0.0053 0.02
0.470 I
0.66
} 2.97
0.222 2.0
NO
A2B
2.0 i D•0145 0.02
0.460
0.63 -�
2.91
0.216 3.2
YES
8.2 - { 0.0091 0.02
B1 �'�
-
0.850
2.17
-
i 5.38
0.403 -� - 2.2
I YES
1132A
i 3.0 ' 0.0091-� 0.02
0.580
1.01
3.67
0.275 i 3.0
I YES
---B213
1.0 0.0333 0.02
0.310
- 0.29
i 1.96
0.148 -- -- 3.5
YES
CHANNEL LINER CALCULATIONS
CHANNEL I.D.
02 {Cl S}
CHANNEL
SLOPE
(FTlFT)
TYPE LINER
PROPOSED
"N" VALUE
FLOW
DEPTH
{FT.}
VELOCITY
(FPS)
SHEAR STRESS
ALLOWED (LB/SF)
COMPUTED
SHEAR STRESS
(L81$F)
TYPE LINER
ADEQUATE?
A1A
3.8
0.0091
i Jute Net
0.022 i 0.68 i 2.9
0.45 0.37
-YES
0.45 I 0.43
A28
2.0 0A145 Jule Net
0.022 0.48 I 2.9
YES 4
Fiberglass
8.2 0,0091 1
Roving
3.0 0.0091 Jute Net
0.021 0.86 2
i .2
0.60 0.49
0.45 0.34
B1
- 132A
YES
YES
0,022 ( 0.59 2.9
,
__ � Double
`; �
-----.. .._. - � -•-•- ---••----I
------- ---
-- -------I-----_._
62B
I 1.0 0.0333 Fiberglass
0.028 0,35 1 2.7
0.85 0,73
i YES
Roving
Compass Pointe Engineering
Ocean Isle Beach, NC