SW8980308_Historical File_19980430

State of North Carolina
Department of Environment
and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Division of Water Quality
Mr. Tony Arato, Vice President
Applied Analytical Industries, Inc.
1206 N. 23rd Street
Wilmington, NC 28405
Dear Mr. Arato:
4 •
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
April 30, 1998
Subject: Permit No. SW8 980308
Applied Analytical Office Building Expansion
High Density Commercial Stormwater Project
New Hanover County
The Wilmington Regional Office received the Stormwater Management Permit Application for Applied Analytical Office`
Building Expansion on March 9, 1998, with final information on April 29, 1998. Staff review of the plans and
specifications has determined that the project, as proposed, will comply with the Stormwater Regulations set forth in Title
15A NCAC 2H.1000. We are forwarding Permit No. SW8 980308 dated April 30, 1998, for the construction of Applied
Analytical Office Building Expansion.
This permit shall be effective from the date of issuance until April 30, 2008, and shall be subject to the conditions and
limitations as specifiet therein. Please pay special attention to the Operation and Maintenance requirements in this permit.
Failure to establish an adequate system for operation and maintenance of the stormwater management system will result
in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an
adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be
in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the
Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this
permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please contact Linda Lewis, or me at
[phone].
Sincerely,
t ---c Cam- �•v� Qrl
Rick Shiver, P.G.
Acting Regional Water Quality Supervisor
RSS/arl: S:1WQSISTORMWAT\PERMIT1980308.APR
cc: John Tunstall, P.E.
Tony Roberts, New Hanover County Inspections
Beth Easley, New Hanover County Engineering
David Mayes, P.E., City of Wilmington Engineering
Linda Lewis
Wilmington Regional Office
Central Files
127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equa➢ Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

State Stormwater Management Systems
Permit No. SW8 980308
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other
applicable Laws, Rules; and Regulations
PERMISSION IS HEREBY GRANTED TO
Applied Analytical Industries, Inc.
Applied Analytical Office Building Expansion
New Hanover County
FOR THE
construction, operation and maintenance of a detention pond in compliance with the provisions of 15A NCAC 2H .1000
(hereafter referred to as the "stormwater rules ") and the approved stormwater management plans and specifications and
other supporting data as attached and on file with and approved by the Division of Water Quality and considered a part of
this permit.
This permit shall be effective from the date of issuance until April30, 2008 and shall be subject to the following specified
conditions and limitatipns:
I. DESIGN STANDARDS
This permit is effective only with respect to the nature and volume of stormwater described in the application and
other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as described on page 3 of this
permit, the Project Data Sheet. The stormwater control has been designed to handle the runoff from 411,842 square
feet of impervious area.
3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the
permit.
4. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved
plans.
2

State Stormwater Management Systems
Permit No. SW8 980308
Project Name:
Permit Number:
Location:
Applicant:
Mailing Address:
Application Date:
Water Body Receiving Stormwater Runoff
Classification of Water Body:
If Class SA, chloride sampling results:
Pond Depth, feet:
Permanent Pool Elevation, FMSL:
Total Impervious Surfaces, ftz:
Total Offsite Area entering Pond, ftz:
City Street
Service News (&90 %
Required Surface Area, ftz:
Provided Surface Area, ftz:
Required Storage Volume, ft3:
Provided Storage Volume, ft3:
Temporary Storage Elevation, FMSL:
Controlling Orifice:
)IVISION OF WATER QUALITY
PROJECT DATA SHEET
Applied Analytical Office Building Expansion
980308
New Hanover County
Mr. Tony Arato, Vice President
Applied Analytical Industries, Inc.
1206 N. 23rd Street
Wilmington, NC 28405
March 9, 1998
Smith Creek
"C Sw"
n/a
6.5
11.5
411,842
161,665
80,780
80,885
20,000
25,262
33,367
38,501
12.9
2.5"$ pipe
3

State Stormwater Management Systems
Permit No. SW8 9.0 08
5. All runoff from all built -upon area on the project must be directed into the permitted stormwater control system.
6. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable built -
upon area.
7. The following items will require a modification to the permit:
a. Any revision to the approved plans, regardless of size.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area.
e. Further subdivision of the project area.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan.
In addition, the Director may determine that other revisions to the project should require a- modification to the
permit.
8. The Director may notify the permittee when the permitted site does not meet one or more of the minimum
requirements of the permit. Within the -time frame specified in the notice, the permittee shall submit'a written time
schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies
of revised plans and certification in writing to the Director that the changes have been made.
II. SCHEDULE OF COMPLIANCE
1. The permittee will comply with the following schedule for construction and maintenance of the stormwater
management system:
a. The stormwater management system shall be constructed in it's entirety, vegetated and operational for its
intended use prior to the construction of any built -upon surface except roads.
b. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be
repaired immediately.
2. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted stormwater
system functions at optimum efficiency. The approved Operation and Maintenance Plan must be followed in its
entirety and maintenance must occur at the scheduled intervals including, but not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of side slopes.
d. Immediate repair of eroded areas.
e. Maintenance of side slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of outlet structure, orifice device and catch basins and piping.
g. Access to the outlet structure must be available at all times.
3. Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ.
The records will indicate the date, activity, name of person performing the work and what actions were taken.
4. Decorative spray fountains will not be allowed in the ponds.
5. This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this
permit, the approved plans and specifications, and other supporting data.
4

State Stormwater Management Systems
Permit No. SW8 980308
Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this
permitted facility, a certification must be received from an appropriate designer for the system installed certifying
that the permitted facility has been installed in accordance with this permit, the approved plans and specifications,
and other supporting documentation. Any deviations from the approved plans and specifications must be noted on
the Certification.
7. A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of ten
years from the date of the completion of construction.
8. Prior to the sale of any portion of the property, an access/maintenance easement to the stormwater facilities shall
be granted in favor of the pernuttee if access to the stormwater facilities will be restricted by the sale of any portion
of the property.
III. GENERAL CONDITIONS
1. This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there is a
name change of the Permittee, a formal permit request must be submitted to the Division of Water Quality
accompanied by an application fee, documentation from the parties involved, and other supporting materials as may
be appropriate. The approval of this request will be considered on its merits and may or may not be approved.
2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to enforcement
action by the Division of Water Quality, in accordance with North Carolina General Statute 143-215.6A to 143-
215.6C.
3. The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules,
regulations, or ordinances which may be imposed by other government agencies (local, state, and federal) which
have jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the
Permittee shall take immediate corrective action, including those as may be required by this Division, such as the
construction of additional or replacement stormwater management systems.
5. The permitteegrants DENR Staff permission to enter the property for the purpose of inspecting all components
of the permitted stormwater management facility.
6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit
modification, revocation and reissuance or termination does not stay any permit condition.
Permit issued this the 30th day of April, 1998.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
'17(P-� A. Preston Howard, Jr., F.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 980308
k

State Stormwater Management Systems
Permit No. SW8 S80 08
Applied Analytical Office Building Expansion
Stormwater Permit No. SW8 980308
New Hanover County
Engineer's Certification
I, , 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)
for (Project Owner) hereby state that, to the best of my abilities, due care and
diligence was used in the observation of the project construction such that the construction was observed to be built within
substantial compliance and intent of the approved plans and specifications.
Noted deviations from approved plans and specification:
ON
Signature
Registration Number
Date
SEAL
2

I
STORMWATER
A&K #972 30
POND MAINTENANCE REQUIREMENTS D E C E I V E
Project Name: AAI Expansion - Office Building Project Number: AP D
R 2 L1, 91.8
P 'imittee: Amlied Analvtical Inch-aripq A.,,
Address: _1206 N. 23rd Street Wilmington. NC 28405 Phone No. 910-392-1606
I. Monthly, or after every runoff -producing rainfall event, whichever comes first:
A. Inspect the trash rack; remove accumulated debris, repair/replace if it is not functioning.
B. Inspect and clear the orifice of any obstructions. If a pump is used as the drawdown
mechanism, pump operation will be checked. A log of test runs of the pump will be kept
on site and made available to DWQ personnel upon request.
C. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
D. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion and proper operation of the flow spreader
mechanism. Repairs/cleaning will be done as necessary.
II. Quarterly (Four times a year):
A. Inspect the collection system (i.e., catch basins, i in
P p g, grassed swales) for proper
functioning. Accumulated trash will be cleared from basin grates, basin bottoms, and piping
will be checked for obstructions and cleared as required.
B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired.
III. Semi-annually (twice a yeas):
A. Accumulated sediment from the bottom of the outlet structure will be removed.
B. The forebay depth will be checked at various points. Sediment removal is required when the
depth is reduced to 75 % of original design depth of _ 6m 5 feet.
C. Grassed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary. Repair eroded areas immediately.

L
1
POND MAINTENANCE REQUIREMENTS
PAGE 2
IV. Annually (Once a year):
A. The pond depth will be checked at various points. Sediment removal is required when the
depth is reduced to 75 % of the original design depth or 3', whichever is greater. Design depth
is 6.5, , measured vertically from the orifice down to the pond's bottom. Sediment must be
removed to at least the original design depth.
V . General:
A. Mowing of the side slopes will be accomplished according to the season. Maximum grass
height will be 6" .
B. Cattails are encouraged along the pond perimeter; however, they will be removed when they
cover more than 1/2 the surface area of the pond. The best time to cut them is at the end of
the growing season, in November. Environmentally sensitive chemicals for use in killing
cattails can also be used. Contact your nearest Agricultural Extension Agent.
C. The orifice is designed to draw down the pond in 2-5 days. If drawdown is not accomplished
in that time, the orifice will be replaced with a larger or smaller orifice. Slow drawdown may
be attributed to a clogged system. The source of the clogging will be found and eliminated.
D. All components of the detention pond system will be kept in good working order. Repair or
replacement components will meet the original design specifications as per the approved
stormwater plan. If previously approved components are determined to be ineffective, the
component will be redesigned and/or replaced.
V. Special Requirements:
1, Tony Arato, Vice -President , hereby acknowledge that I am the financially
(plewe pfwt or type now crawly)
responsible party for maintenance of this detention pond. I will be responsible for the performance of the
maintenance as outlined above, as part of the Stormwater Management Permit received for this project.
Signature: !iJ��
Revised VZ5/97
Date: -_5

Data for AAI EXPANSION Page 1
TYPE III 24-HOUR RAINFALL= 7.0 IN JDYTz. 'STl lW
Prepared by ANDREW & KUSKE CONSULTING ENGINEERS, INC. 28 Apr 98
HydroCAD 4.523 000479 lci 1986-1996 Applied Microcomputer Systems
WATERSHED ROUTING
0
0
0
OSUBCATCHMENT REACH Q PONO 1' LINK

Data for AAI EXPANSION Page 2
TYPE III 24-HOUR RAINFALL= 7.0 IN
Prepared by ANDREW & KUSKE CONSULTING ENGINEERS, INC. 28 Apr 98
HYdroCAD 4.523 000479 (c) 1986-1996 Applied Microcomputer Systems
SUBCATCHMENT 1
AAI EXP.,AAI EXIST.,SERVICE NEWS, NEW ROAD
PEAK= 50.84 CFS @ 12.29 HRS, VOLUME= 5.40 AF
ACRES CN SCS TR-20 METHOD
9.46 98 IMPERVIOUS AREA TYPE III 24-HOUR
4.20 60 GREEN AREA RAINFALL= 7.0 IN
13.66 86 SPAN= 10-20 HRS, dt=.1 HRS
Method Comment Tc (mini
DIRECT ENTRY ENTIRE AREA 25.0

Data for AAI EXPANSION Page 4
TYPE III 24-HOUR RAINFALL= 7.0 IN
Prepared by ANDREW & KUSKE CONSULTING ENGINEERS, INC. 28 Apr 98
HdroCAD 4.523 000479 (c) 1986-1996 Applied Microcomputer Systems
POND 1
POND
Qin = 50.84
CFS @
12.29 HRS,
VOLUME= 5.40
AF
Qout= 21.82
CFS @
12.72 HRS,
VOLUME= 4.40
AF,
ATTEN= 57%, LAG=
25.9 MIN
Qpri= 20.96
CFS @
12.72 HRS,
VOLUME= 4.38
AF
Qsec= .86
CFS @
12.72 HRS,
VOLUME= .02
AF
ELEVATION
AREA
INC.STOR
CUM.STOR
STOR-IND METHOD
(FT)
(SF)
(CF)
(CF)
PEAK STORAGE =
186325 CF
5.0
100
0
0
PEAK ELEVATION=
14.9 FT
11.5
25260
82420
82420
FLOOD ELEVATION=
15.5 FT
12.0
27400
13165
95585
START ELEVATION=
11.5 FT
12.9
29740
25713
121298
SPAN= 10-20 HRS,
dt=.1 HRS
13.0
30000
2987
124285
Tdet= 203.8 MIN
(2.47 AF)
14.8
35000
58500
182785
15.0
35600
7060
189845
15.5
37000
18150
207995
# ROUTE INVERT_ OUTLET DEVICES
1 P 11.5' 2.5' ORIFICE/GRATE
Q=.6 PI r"2 SQR(2g) SQR(H-r)
2 P 12.9' 4.5' x .75' ORIFICE/GRATE
Q=.6 Width 2/3 SQR(2g) (H"1.5 - [H-Height]-1.5)
3 S 14.9' 16' SHARP -CRESTED RECTANGULAR WEIR
Q=C L H-1.5 C=3.27+.4 H/1 L=Length-2(.1 H)
Primary Discharge
�1=0rif ice/Grate
2=0r i f i ce/Grate
Secondary Discharge
13=Sharp-Crested Rectangular Weir

Data for AAI EXPANSION
TYPE III 24-HOUR RAINFALL= 7.0 IN
Prepared by ANDREW & KUSKE CONSULTING ENGINEERS, INC.
HvdrnCAD 4_ S?l nnn47Q r r i I QAA- i aQA Ann l ;nrl M i rvrnrnn
REACH 1
Qin = 20.96 CFS @ 12.72 HRS, VOLUME= 4.38 AF
Qout= 20.93 CFS @ 12.74 HRS, VOLUME= 4.38 AF, ATTEN= 0%, LAG=
DEPTH END AREA DISCH
(FT)
(SO -FT)
(CFS)
36" PIPE
0.0
-0.0
0.00
.3
.4
3.37
n= .012
.6
1.0
14.15
LENGTH= 100 FT
.9
1.8
31.64
SLOPE= .05 FT/FT
2.1
5.3
135.27
2.4
6.1
157.93
2.7
6.7
172.20
2.8
6.9
173.80
2.9
7.0
172.19
3.0
7.1
161.57
Page 3
28 Apr 98
.9 MIN
STOR-IND+TRANS METHOD
PEAK DEPTH= .72 FT
PEAK VELOCITY= 16.0 FPS
TRAVEL TIME = .1 MIN
SPAN= 10-20 HRS, dt=.1 HRS

Data for AAI EXPANSION Page 5
TYPE III 24-HOUR RAINFALL= 9.0 IN '50YrL !�—TbPM
Prepared by ANDREW & KUSKE CONSULTING ENGINEERS, INC. 28 Apr 98
HydroCAD 4.523 000479 (c) 1986-1996 Applied Microcomputer Systems
WATERSHED ROUTING
0 SUBCATCHMENT REACH Q POND I I LINK

Data for AAI EXPANSION Page 6
TYPE III 24-HOUR RAINFALL= 9.0 IN
Prepared by ANDREW & KUSKE CONSULTING ENGINEERS, INC. 28 Apr 98
HYdroCAD 4.523 000479 (c) 1986-1996 Applied Microcomputer Systems
SUBCATCHMENT 1 AAI EXP.,AAI EXIST.,SERVICE NEWS, NEW ROAD
PEAK= 68.16 CFS @ 12.29 HRS, VOLUME= 7.26 AF
ACRES CN SCS TR-20 METHOD
9.46 98 IMPERVIOUS AREA TYPE III 24-HOUR
4.20 60 GREEN AREA RAINFALL= 9.0 IN
13.66 86 SPAN= 10-20 HRS, dt=.1 HRS
Method Comment Tc (min)
DIRECT ENTRY ENTIRE AREA 25.0

Data for AAI EXPANSION Page 8
TYPE III 24-HOUR RAINFALL= 9.0 IN
Prepared by ANDREW & KUSKE CONSULTING ENGINEERS, INC. 28 Apr 98
HydroCAD 4.523 000479 (c) 1986-1996 Applied Microcomputer Systems
POND I
POND
Qin = 68.16
CFS @
12.29 HRS,
VOLUME= 7.26
AF
Qout= 43.66
CFS @
12.57 HRS,
VOLUME= 6.22
AF,
ATTEN= 36%, LAG=
16.9 MIN
Qpri= 23.98
CFS @
12.57 HRS,
VOLUME= 5.53
AF
Qsec= 19.67
CFS @
12.57 HRS,
VOLUME= .69
AF
ELEVATION
AREA
INC.STOR
CUM.STOR
STOR-IND METHOD
(FT)
(SF)
(CF)
(CF)
PEAK STORAGE =
204353 CF
5.0
100
0
0
PEAK ELEVATION=
15.4 FT
'11.5
25260
82420
82420
FLOOD ELEVATION=
15.5 FT
12.0
27400
13165
95585
START ELEVATION=
11.5 FT
12.9
29740
25713
121298
SPAN= 10-20 HRS,
dt=.1 HRS
13.0
30000
2987
124285
Tdet= 161.1 MIN
(4.27 AF)
14.8
35000
58500
182785
15.0
35600
7060
189845
15.5
37000
18150
207995
# ROUTE INVERT OUTLET DEVICES
1 P 11.5' 2.5" ORIFICE/GRATE
Q=.6 PI r"2 SQR(2g) SQR(H-r)
2 P 12.9' 4.5' x .75' ORIFICE/GRATE
Q=.6 Width 2/3 SQR(2g) (H-1.5 - [H-Height]-1.5)
3 S 14.9' 16' SHARP -CRESTED RECTANGULAR WEIR
Q=C L H-1.5 C=3.27+.4 H/1 L=Length-2(.1 H)
Primary Discharge
�1=Orifice/Grate
2=Orifice/Grate
Secondary Discharge
13=Sharp-Crested Rectangular Weir

Data for AAI EXPANSION Page 7
TYPE III 24-HOUR RAINFALL= 9.0 IN
Prepared by ANDREW & KUSKE CONSULTING ENGINEERS, INC. 28 Apr 98
HydroCAD 4.523 000479 (c) 1986-1996 Applied Microcomputer Systems
REACH 1
Qin = 23.98 CFS @ 12.57 HRS, VOLUME= 5.53 AF
Qout= 24.02 CFS @ 12.58 HRS, VOLUME= 5.52 AF, ATTEN= 0%, LAG= .6 MIN
DEPTH. END AREA DISCH
(FT)
(SO -FT)
(CFSJ
0.0
-0.0
0.00
.3
.4
3.37
.6
1.0
14.15
.9
1.8
31.64
2.1
5.3
135.27
2.4
6.1
157.93
2.7
6.7
172.20
2.8
6.9
173.80
2.9
7.0
172.19
3.0
7.1
161.57
4-imi1Jm
n= .012
LENGTH= 100 FT
SLOPE= .05 FT/FT
STOR-IND+TRANS METHOD
PEAK DEPTH= .77 FT
PEAK VELOCITY= 16.6 FPS
TRAVEL TIME _ .1 MIN
SPAN= 10-20 HRS, dt=.1 HRS

ouuet
r
Project Title: AAI EXPANSION Project Engineer: JOHN TUNSTALL
c:lhaestadWmclaaLstm SITEWORKS DESIGN GROUP StormCAD v1.0
00/05M 03:24:59 PM ®Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 1 of 1

DOT Report
Pipe
-Node
Upstream
Downstream
Inlet
Area
(acres)
Inlet
CA
(acres)
Total
CA
(acres)
-Ground-
Upstream
Downstream
(ft)
-HGL-
Upstream
Downstream
(ft)
-Slope-
Energy
Constructed
(ftmt)
-Section-
Discharge
Capacity
(cfs)
-Section-
Shape
Size
Length
(ft)
Average
Velocity
ft/s
Description
P-19
1-17
0.52
0.49
0.49
22.00
18.81
0.138972
3.60
Circular
17.00
4.93
J-1
21.30
16.55
0.160000
14.25
121nch
P-1
1-1
0.40
0.38
0.38
20.25
17.72
0.002943
2.77
Circular
88.00
3.17
1-2
20.00
17.58
0.005000
4.57
15 inch
P-2
1-2
0.46
0.44
0.82
20.00
.17.58
0.004737
5.89
Circular
141.00
4.51
1-3
19.75
16.94
0.004823
7.29
18 inch
P-3
1-3
0.39
0.37
1.19
19.75
16.94
0.004036
8.44
Circular
130.00
4.50
J-1
21.30
16.55
0.004615
15.37
24 inch
P-6
J-1
N/A
N/A
1.68
21.30
16.55
0.004847
11.81
Circular
119.00
5.36
1-6
20.75
16.05
0.005042
16.06
24 inch
P-20
1-6
0.16
0.15
1.83
20.75
16.05
0.003911
12.76
Circular
138.00
5.05
1-9
19.00
15.67
0.004928
15.88
24 inch
P-12
1-12
0.26
0.25
0.25
21.50
16.28
0.006M
1.80
Circular
74.00
2.54
1-10
19.00
15.96
0.013514
7.51
15 inch
P-13
1-13
0.26
0.25
0.25
21.50
17.28
0.009774
1.80
Circular
71.00
2.66
1-11
20.00
16.75
0.014085
7.67
15 inch
P-11
1-11
0.60
0.57
0.82
20.00
16.75
0.004687
5.89
Circular
193.00
4.30
1-10
19.00
15.96
0.005181
7.56
18 inch
P-10
1-10
0.56
0.53
1.60
19.00
.15.96
0.003908
11.29
Circular
138.00
4.87
1-9
19.00
15.67
0.005435
16.68
24 inch
P-14
1-9
0.07
0.07
3.50
19.00
15.67
0.009711
24.03
Circular
60.00
8.04
1-15
17.98
14.51
0.013333
47.36
30 inch
P-15
1-15
0.16
0.15
3.65
17.98
14.81
0.006995
25.00
Circular
12.00
5.75
J-2
18.25
14.98
0.016667
86.10
361nch
P-16
J-2
WA
N/A
3.65
18.25
14.98
0.001974
24.98
Circular
60.00
4.71
1-18
18.00
14.96
0.005000
47.16
36 inch
P-18
1-18
0.00
0.00
8.77
18.00
14.96
0.008434
48.17
Circular
83.00
8.43
Outlet
I
I
116.00
14.26
0.ODS434
61.25
36 inch
Project Title: AAI EXPANSION Project Engineer: JOHN TUNSTALL
c:%haestadlstmclaai.stm SITEWORKS DESIGN GROUP StormCAD v1.0
03/05198 03:24:10 PM 0 Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Paaa 1 of 1

Ip-
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Project Engineer: LARRY SNEEDEN
c:lhaestadlstmclaai-9723.stm SITEWORKS DESIGN GROUP StormCAD v1.0
03/04M 02:36:19 PM 6 Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 1 of 1

DOT Report
Pipe
-Node-
Upstream
Downstream
Inlet
Area
(acres)
Inlet
CA
(acres)
Total
CA
(acres)
-Ground-
Upstream
Downstream
(ft)
-HGL-
Upstream
Downstream
(ft)
-Slope-
Energy
Constructed
(ft/ft)
-Section-
Discharge
Capacity
(cfs)
-Section-
Shape
Size
Length
(ft)
Average
Velocity
(ft/s)
Description
P-24
1-13
0.17
0.13
0.13
19.42
16.40
0.016042
0.92
Circular
13.00
2.68
J-10
19.70
16.26
0.019231
4.94
12 inch
P-25
1-14
0.11
0.08
0.08
19.42
16.32
0.007727
0.59
Circular
18.00
2.10
J-10
19.70
16.26
0.013889
4.20
12 inch
P-23
J-10
N/A
N/A
0.21
19.70
16.26
0.004316
1.50
Circular
290.00
3.21
J-8
18.20
15.00
0.004310
4.24
15 inch
P-22
1-12
0.20
0.15
0.15
17.98
14.97
0.001361
1.08
Circular
28.00
1.97
J-8
18.20
15.00
0.008929
6.10
15 inch
P-27
1-16
0.00
0.00
3.43
19.00
15.47
0.012571
18.84
Circular
59.00
5.77
1-11
17.98
14.91
0.013559
47.76
30 inch
P-21
1-11
0.20
0.15
3.58
17.98
14.91
0.002828
19.61
Circular
13.00
5.07
J-8
18.20
15.00
0.015385
50.87
30 inch
P-20
J-8
N/A
N/A
3.93
18.20
15.00
0.001426
21.54
Circular
61.00
4.01
J-9
17.92
14.99
0.004918
46.77
36 inch
P-18
1-10
0.23
0.22
0.22
17.62
15.18
0.000602
1.59
Circular
18.00
1.31
J-6
17.85
15.17
0.039444
12.83
15 inch
P-17
1-9
0.23
0.17
0.17
17.62
15.18
0.000365
1.24
Circular
14.00
1.02
J-6
17.85
15.17
0.050714
14.55
15 inch
P-15
1-8
0.17
0.13
0.13
19.73
17.25
0.000201
0.92
Circular
19.00
0.75
J-5
19.97
17.24
0.017895
8.64
15 inch
P-14
1-7
0.17
0.13
0.13
19.73
17.25
0.000201
0.92
Circular
12.00
0.75
J-5
19.97
17.24
0.049167
14.32
15 inch
P-9
1-6
2.05
0.73
0.73
20-00
18.05
0.001970
4.63
Circular
48.00
3.06
J-4
20.80
18.04
0.015625
13.13
18 inch
P-30
1-18
0.70
0.40
0.40
22.41
21.47
0.046464
2.57
Circular
49.00
4.35
1-5
21.84
19.22
0.046531
7.68
12 Inch
P-7
1-5
0.14
0.10
0.51
21.84
19.22
0.005422
3.22
Circular
21.00
3.50
J-3
22.08
19.30
0.040476
13.00
15 inch
P-26
1-15
1.03
0.78
0.78
20.00
19.39
0.002154
5.01
Circular
30.00
2.88
1-4
21.84
19-33
0.006667
8.58
18 inch
P-6
1-4
0.14
0.10
0.89
21.84
19.33
0.002885
5.64
Circular
12.00
3.19
J-3
22.08
19.30
0.012500
11.74
18 inch
P-29
1-17
1.60
1.26
1.26
24.67
23.54
0.066249
8.04
Circular
44.00
6.85
1-3
23.22
20.66
0.066364
16.64
15 inch
P-3
1-3
0.21
0.15
1.41
23.22
20.66
0.021011
9.00
Circular
20.00
5.69
J-2
24.43
20.40
0.025000
16.61
18 inch
P-4
1-2
0.21
0.15
0.15
23.08
20.45
0.008597
1.13
Circular
22.00
2.37
J-2
24.43
20.40
0.045455
7.60
12 inch
P-1
1-1
1.04
0.79
0.79
22.50
20.93
0.010544
5.78
Circular
31.00
4.72
J-1
24.26
20.69
0.011290
11.16
18 inch
P-2
J-1
N/A
N/A
0.79
24.26
20.69
0.003262
5.76
Circular
129.00
3.88
J-2
24.43
20.40
0.005039
7.46
18 inch
P-5
J-2
NIA
NIA
2.36
24.43
20.40
0.006062
15.01
Circular
211.00
5.91
J-3
22.08
19.30
0.006398
18.09
24 inch
P-8
J-3
N/A
N/A
3.75
22.08
19.30
0.006895
23.47
Circular
200.00
6.53
J-4
20.80
18.04
0.007000
34.32
30 inch
P-13
J-4
N/A
N/A
4.48
20.80
18.04
0.006447
27.59
Circular
130.00
7.24
J-5
19.97
17.24
0.006462
32.97
30 inch
P-16
J-5
N/A
N/A
4.73
19.97
17.24
0.006416
28.89
Circular
330.00
7.38
J-6
17.85
15.17
0.006424
32.87
30 inch
P-19
J-6
N/A
N/A
5.12
17.85
15.17
0.008718
30.58
Circular
ro
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RY SNEED
--- -•--•-•••• �i i-wnna 9jca1%
an %3Kuur StormCAD v1.0
03105/98 03:An•0' PM ®Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 1 of 2

DOT Report
Pipe
-Node-
Upstream
Inlet
Area
Inlet
CA
Total
CA
-Ground-
Upstream
-HGL-
Upstream
Slope-
Energy
-Section-
Discharge
-Section-
Shape
Length
Average
Description
Downstream
(acres)
(acres)
(acres)
Downstream
Downstream
Constructed
Capacity
Size
(ft)
Velocity
(ft/s)
00
(ft)
(�)
WS)
J-9
17.92
14.99
0.011346
43.69
30 inch
P-28
1
N/A
N/A
9.05
17.92
14.99
0.008701
49.38
Circular
64.00
9.38
Outlet
16.001
13.941
0.010937
69.75
36 inch
Project Engineer: LARRY SNEEDEN
c:%haestaMstmc%aai-9723.stm SITEWORKS DESIGN GROUP StormCAD v1.0
031D5M 03:40:22 PM 0 Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 2 of 2

John R. Andrew, P.E.
Andrew & Kuske J.A. Kuske, P.E.
CONSULTING ENGINEERS, INC. J. Phillip Norris, P.E.
902 Market St. • Wilmington, North Carolina 28401-4733 • Telephone [phone] . Fax [phone]
April 29, 1998
NCDENR/Div. of Environmental Mgmt.
127 Cardinal Drive Extension
Wilmington, NC 28405-3845 P-I,
Attn: Ms. Linda Lewis
RE: AAI Expansion
A & K Project No. 97230
Dear Ms. Lewis:
DIVED :S0j gel Xj3o 3
APR 2 9 1998
In response to your letter of April 27, 1998, please find the following revised plans,
calculations, and permit application for the above referenced project. Also find the
following responses to your comments.
1. Plans and calculations have been revised to account for the Service News site
at full build out potential (90% Impervious).
2. Permanent pool contour is dimensioned on plan.
3. Wet detention pond supplement list has been revised to show state flood pool
elevation.
4. The pond is located on AAI property.
Sincerely,
ANDREW & KUSKE
CONSULTING ENGINEERS, INC.
Jo n S. Tunstall, P. E.
JST/tsm
Attachment
cc: Mr. Phil Sharpe/Sharpe Architecture
97MO-27

State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
L GENERAL INFORMATION
Applicants name (specify the name of the corporation, individual, etc. who owns the project):
Applied Analytical Industries, Inc.
2. Print Owner/Signing Official's name and title (the person who is legally responsible for the facility and its compliance):
Tony Arato, Vice President
3. Mailing Address for person listed in item 2 above:
1206 N. 23rd Street
City: Wilmmgton State: NC Zip: 28405
Telephone Number: ( 910 ) 392-1606
4. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
_Applied Analytical Office Building Expansion
5. Location of Facility (street address):
1206 N. 23rd Street
City: Wilmington County: New Hanover
6. Directions to facility (from nearest major intersection):
From intersection of US Hwy 17 (Market St.) and 23rd St. - Head North on 23rd. St. AAI Facility approx.
0.95 miles from intersection.
7. Latitude: 340 15' 27" Longitude: 770 55' 07" of facility
8. Contact person who can answer questions about the facility:
Name: Tony Arato, Vice -President Telephone Number: ( 910 ) 392-1606
IL PERMIT INFORMATION:
1. Specify whether project is (check one): X New Renewal Modification
2. If this application is being submitted as the result of a renewal or modification to an existing permit, list
the existing permit number N/A and its issue date(if known) N/A
Form SWU-101 January 1998 Page 1 of 4

3, Specify the type of project (check one):
Low Density X High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
CAMA X Sedimentation/Erosion Control 404 Permit
III. PROJECT INFORMATION:
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
Stormwater will be treated by a wet detention pond designed at 90% TSS removal.
2. Stormwater runoff from this project drains to the Cape Fear River basin.
3. Total Project Area: 13.66 acres 4. Project Built Upon Area: 8.6 ac/62% %
5. How many drainage basins does the project have? one
6. Complete the following information for each drainage basin. If there are more than two drainage basins in the project,
attach an additional sheet with the information for each basin provided in the same format as below.
PntirP nrninna,- ArPn
u
::...t"
Smith Creek
Receiving Stream Name
Receiving Stream Class
C-SW
Drainage Basin Area
13.66 AC
Existing Impervious* Area
3.02 AC
Proposed Impervious* Area
8.60 AC
Impervious* Area total
62%
R E v' "•
50,441 F
On -site Buildings, PH I II III
On -site Streets Public Road
64,750 Ft
On -site Parking
105,111 Ft
On -site Sidewalks
6,500 Ft
Other on -site Sidewalk with R/W
16,030 Ft
Off -site
131,550 Ft
Total:
E=374 382 F - 8.60ac
E_
*Impervious area is defned as the built upon area including, but not limited to, buildings, roans, pariang
areas, sidewalks, gravel areas, etc.
7. How was the off site impervious area listed above derived: Existing AAI site - as -built survey, impervious areas
taken off of computer; Service News site - field verification and aerial photo
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
Deed restrictions and protective covenants and required to be recorded for all low density projects and all subdivisions
prior to the sale of any lot. Please see Attachment A for the specific items that must be recorded.
Form SWU-101 January 1998 Page 2 of 4

_33 'Specify the type of project (check one):
Low Density X High Density Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
CAMA X Sedimentation/Erosion Control 404 Permit
M PROJECT tPTFORMATION:
1. In the space provided below, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
Stormwater will be treated by a wet detention pond designed at 90% TSS removal.
2. Stormwater runoff from this project drains to the Cape Fear River basin.
3. Total Project Area: 13.66 acres 4. Project Built Upon Area: 9.46 ac/69%
5. How many drainage basins does the project have?
one
6. Complete the following information for each drainage basin. If there are more than two drainage basins in the project,
attach an additional sheet with the information for each basin provided in the same format as below.
Entire Drainage Area
Receivin Stream Name
Smith Creek
Receiving Stream Class
C-SW
Drainage Basin Area
13.66 AC
Existing Impervious* Area
3.88 AC
Proposed Impervious* Area
9.46 AC
% Impervious* Area total
69%
On -site Buildings,PHI II III
50,441 F
On -site Streets Public Road
64,750 F
On -site Parking
105,111 F
On -site Sidewalks
6,500 F
Other on -site Sidewalk with R/W
16,030 F
Off -site
169,012 F
Total:
E=411842 F - 9.46ac
£_
-impervious area is aennea as the ouur upon area tnctuaing, out not atmttea to, outtatngs, roaas, parking
areas, sidewalks, gravel areas, etc.
7. How was the off site impervious area listed above derived: Existing AAI site - as -built survey, impervious areas
taken off of computer; Service News site - field verification and aerial photo
W. ➢DIEFID RESTRICTIONS AND PROTECTIVE COVENANTS
Deed restrictions and protective covenants and required to be recorded for all low density projects and all subdivisions
prior to the sale of any lot. Please see Attachment A for the specific items that must be recorded.
Form SWU-101 January 1998 Page 2 of 4

A&K #97230
POND MAINTENANCE REQUIREMENTS
Project Name: AAI Expansion - Office Building Project Number: 9oOlj ? p e
Permittee:
Applied
Analytical
Industries,
Inc.
Address:
1206
N. 23rd Street,
Wilmington,
NC 28405 Phone No. 910-392-1606
I. Monthly, or after every runoff producing rainfall event, whichever comes first:
A. Inspect the trash rack; remove accumulated debris, repair/replace if it is not functioning.
B. Inspect and clear the orifice of any obstructions. If a pump is used as the drawdown
mechanism, pump operation will be checked. A log of test runs of the pump will be kept
on site and made available to DWQ personnel upon request.
C. Inspect the pond side slopes and grassed inlet swales; remove trash, and repair eroded areas
before the next rainfall event.
D. If the pond is operated with a vegetated filter, the filter will be checked for sediment
accumulation, trash accumulation, erosion and proper operation of the flow spreader
mechanism. Repairs/cleaning will be done as necessary.
II. Quarterly (Four times a year) :
A. Inspect the collection system (i.e., catch basins, piping, grassed swales) for proper
functioning. Accumulated trash will be cleared from basin grates, basin bottoms, and piping
will be checked for obstructions and cleared as required.
B. Pond inlet pipes will be checked for undercutting. Riprap or other energy dissipation
structures will be replaced, and broken pipes will be repaired.
III. Semi-annually (twice a year) :
A. Accumulated sediment from the bottom of the outlet structure will be removed.
B. The forebay depth will be checked at various points. Sediment removal is required when the
depth is reduced to 75 % of original design depth of 6.5 feet.
C. (massed swales, including the vegetated filter if applicable, will be reseeded twice a year as
necessary. Repair eroded areas immediately.

POND MAINTENANCE REQUIREMENTS
PAGE 2
IV
u
CIA
Annually (Once a year):
STORMWATER
D E C E I V E
D
MAR 0 91998
D E M
PROJ #
A. The pond depth will be checked at various points. Sediment removal is required when the
depth is reduced to 75% of the original design depth or 3', whichever is greater. Design depth
is fi :5 +, measured vertically from the orifice down to the pond's bottom. Sediment must be
removed to at least the original design depth.
General:
A. Mowing of the side slopes will be accomplished according to the season. Maximum grass
height will be 6" .
B. Cattails are encouraged along the pond perimeter; however, they will be removed when they
cover more than 1/2 the surface area of the pond. The best time to cut them is at the end of
the growing season, in November. Environmentally sensitive chemicals for use in killing
cattails can also be used. Contact your nearest Agricultural Extension Agent.
C. The orifice is designed to draw down the pond in 2-5 days. If drawdown is not accomplished
in that time, the orifice will be replaced with a larger or smaller orifice. Slow drawdown may
be attributed to a clogged system. The source of the clogging will be found and eliminated.
D. All components of the detention pond system will be kept in good working order. Repair or
replacement components will meet the original design specifications as per the approved
stormwater plan. If previously approved components are determined to be ineffective, the
component will be redesigned and/or replaced.
Special Requirements:
I, Tony Arato, Vice -President , hereby acknowledge that I am the financially
W—ePrW-:ffle—cka.&,
responsible party for maintenance of this detention pond. I will be responsible for the performance of the
maintenance as outlined above, as part of the Stormwater Management Permit received for this project.
Signature:
Revived 2125M
Date: 0-q-7r

John R. Andrew, P.E.
Andrew & Kuske J.A. Kuske, P.E.
CONSULTING ENGINEERS, INC. J. Phillip Norris, P.E.
902 Market St. • Wilmington, North Carolina 28401-4733 • Telephone [phone] • Fax [phone]
March 9, 1998
NC DENR
Division of Water Quality
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
Attn: Ms. Linda Lewis
.CEIVED
MAR 0 9 1998
BY:
Re: Applied Analytical Office Expansion
New Hanover County
A&K Project No. 97230
Dear Ms. Lewis:
Enclosed are three sets of plans for the subject project, calculations, the original
Division of Water Quality stormwater management permit application and one
copy and a $385.00 check for the processing fee. Also enclosed is Pond
Maintenance Requirements, Form SWU-102 and a Stormwater Narrative.
Please review this information for approval and contact us with any questions or
comments you may have. Thank you for your assistance on this project.
Sincerely,
ANDREW & KUSKE
CONSULTING ENGINEERS, INC.
JPn . Tunstal I, P. E.
JST/tsm
Enclosures
cc: Mr. Tony Arato/AAI
9729o-SW

_- — — Andrew & Kuske
CONSULTING ENGINEERS, INC.
John R. Andrew, P.E.
J.A. Kuske, P.E.
J. Phillip Norris, P.E.
902 Market St. • Wilmington, North Carolina 28401-4733 • Telephone [phone] • Fax [phone]
AAI OFFICE BUILDING EXPANSION
STORMWATER NARRATIVE
MARCH 6, 1998
A & K NO. 97230
AAI is planning to build a new facility'behind its current office in Wilmington, NC. The
current AAI office is located on 23rd' Street between Service News Company on the
North and Expo Business Park on the South.
The proposed development is within the City of Wilmington limits and the land
disturbance will be over an acre, therefore the development will be designed to comply
with the State Stormwater requirements as well as the City of Wilmington stormwater
requirements. The drainage area to the stormwater detention pond consists of the
proposed AAI facility, the existing AAI site, the 36' wide public collector street within a
60 ft. right of way, and the Service News Company site along 23rd Street. The
Impervious area of the Service News site was taken to be at the max build upon area
(90% Impervious). The total contributing drainage area to the stormwater detention
pond is 13.66 acres. The contributing impervious areas (9.46 acres) of the existing AAI
facility and the new development were calculated by the computer. The Service News
Co. drainage area was taken off aerial photo maps and was also field verified.
Wetlands exist on the site and are delineated on the plans. The proposed
development and the stormwater detention pond are outside the limits of the wetlands.
Stormwater runoff will be collected by a series of drop inlets and will be conveyed to the
detention pond by reinforced concrete pipe. The stormwater detention pond will be
designed for 90% TSS removal and will store and release the 1st one inch volume of
rainfall within a period of 2 to 5 days. The stormwater collection system and pond will
also be designed in accordance with City of Wilmington Standards for a 10 year storm
event and will be checked for the 50 year storm event. In efforts to improve the water
quality of the effluent water, the pond outlet will discharge into the wetlands. All
necessary erosion control measures are designed in conjunction with the contributing
stormwater runoff and are shown on the plans.

Date
Design Andrew and Kuske
202 N. Fifth Ave. CONSULTING ENGINEERS, INC. Wilmington, N.C. 28401
Check Job Sr�r,MK44,2EZ For
C�L,L'L!l�1T/oN5
Sheet
rf
Job No.
97230
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PROJ.# $U36$

Date Design Andrew and Kuske Sheet
202 N. Fifth Ave. CONSULTING ENGINEERS, INC. Wilmington, N.C. 28401 Of
Check Job l�Tq j E STo/zJv(W� 7-1-
For �yvr'�%'/✓S�p�/ Job No.
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Date
Design o„ Andrew and Kuske [Sheet
:f 202 N. Fifth Ave. CONSULTING ENGINEERS, INC, Wilmington, N.C. 28401 3 Of
Check Job '%A� ���ar For A Job No.
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Date Design Andrew and Kuske
5 f 8 4f 202 N. Fifth Ave. CONSULTING ENGINEERS, INC. Wilmington, N.C. 28401
Check Job STor'�i w,o T� 2 For �Ar
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Permit No. � 9�O-TOs
(to be provided by DWQ-
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original
DWQ Stormwater M nagement Plan Review•
A complete stormwater management plan submittal includes a wet detention basin supplement for each basin,
design calculations, plans and specifications showing all basin and outlet structure details, and a fully
executed operation and maintenance agreement.
I. PROJECT INFORMATION (please complete the following information):
Project Name: Applied Analytical Office Building Expansion
Contact Person: Tony Arato Phone Number: ( 910 ) 392-1606
For projects with multiple basins, specify which basin this worksheet applies to
Basin Bottom Elevation
Permanent Pool Elevation
Temporary Pool Elevation
5.5
ft.
11.5
ft.
14.75
ft.
Permanent Pool Surface Area 25,262 sq. ft.
Drainage Area
Impervious Area
Permanent Pool Volume
Temporary Pool Volume
Forebay Volume
SA/DA1
Diameter of Orifice
13.66 ac.
8.6 ac.
76,080
cu. ft.
35,925
cu. ft.
7,000
cu. ft.
65 % =3.65
3 in.
Design TSS Removal 90 %
II. REQUIRED ITEMS CHECKLIST
(average elevation of the floor of the bas
(elevation of the orifice)
(Elevation of the discharge structure overflow
(water surface area at the orifice elevation)
(on -site and off -site drainage to the basin)
(on -site and off -site drainage to the basin)
(combined volume of main basin and forebay)
(volume detained above the permanent pool)
(surface area to drainage area ratio)
(85 % TSS removal required, see item k below)
The following checklist outlines design requirements per the Stormwater Best Management Practices manual
(NC Department of Environment, Health and Natural Resources, November 1995) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Form SWU-102 January 1998 Page 1 of 2

a. The temporary pool controls runoff from the 1 inch storm event.
b. The basin length to width ratio is greater than 3: 1.
c. The basin side slopes above the permanent pool are no steeper than 3: 1.
d. A submerged and vegetated perimeter shelf at less than 6:1 is provided (show detail).
e. Vegetation above the permanent pool elevation is specified.
f. An emergency drain is provided to empty the basin.
g. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
h. The temporary pool draws down is 2 to 5 days.
i. A trash rack is provided for both the overflow and orifice.
j. The forebay volume is approximately equal to 20% of the total basin volume.
k. Sediment storage is provided in the permanent pool.
1. 30-foot vegetative filter is provided at the outlet2 (include erosive flow calculations
in. Recorded drainage easement for each basin including access to nearest right-of-way.
n. A site specific operation and maintenance (O&M) plan is provided.
o. A vegetation management/mowing schedule is provided in the O&M plan.
p. Semi-annual inspections are specified in the O&M plan.
q. A debris check to be performed after every storm event is specified in the O&M plan.
r. Specific clean -out benchmarks are specified in the O&M plan (elevation or depth).
s. A legally responsible party is designated in the O&M plan3 (include name and title).
t. If the basin is used for sediment and erosion control during construction, clean out of the.
basin is specified to be performed prior to use as a wet detention basin
1When using the Division SA/DA table, the correct SA/DA ratio for permanent pool sizing should be computed based upon thy:
actual impervious % and permanent pool depth. Linear interpolation should be employed to determine the correct value for non-
standard table entries.
2The requirement for a vegetative filter may be waived if the wet detention basin is designed to meet 90% TSS removal.
3The legally responsible party should not be a homeowners association unless more than 50 % of the lots have been sold and a
resident of the subdivision has been named the president.
Form SWU-102 January 1998 Page 2 of 2

Apr 27 '98 10:58
0 K 9-3439604
State of Nor&. Caroling
went of Enument and�I�at>�ral Resouxces
.: ' � .. ; • Dep �?ff'ice
Wayne McDevitt, Secretary
dies B,.Hulit, .t. w r r `
FAX'
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Date. from. .
to:
u FAX: _
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13T 4639QO 1r�s 19�0) 3!o-?.IIu4
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State of North Carolina
Department of Environment and Natural Resources
Wilmington Regional Office
James B. Hunt, Governor
FAX COVER SHEET
z
Date: A -Z-1 -
To: J onS 2 I
CO: rzw 1� K us Ce-
FAX #: 3¢ — CU V
REMARKS: 73 �n ; 1 'v2L b-ee4 2s
Wayne McDevitt, Secretary
No. Of Pages: .�
From: Li170(a
CO: OILQ
FAX#: [phone]
r -o.- h-se -Fh ; s
4-SAP Ia -the- I f Qxns,
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer

State of North Carolina
Department of Environment
and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Division of Water Quality
April 27, 1998
Mr. John Tunstall, P.E.
Andrew and Kuske
902 Market Street
Wilmington, NC 28401
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: ACKNOWLEDGEMENT OF RECEIPT AND
REQUEST FOR ADDITIONAL INFORMATION
Stormwater Project No. SW8 980308
Applied Analytical Expansion
New Hanover County
Dear Mr. Tunstall:
The Wilmington Regional Office received a Stormwater Management Permit Application for Applied
Analytical Expansion on March 9, 1998. A preliminary review of that information has determined that the
application is not complete. The following information is needed to continue the stormwater review:
1. Have you accounted for the offsite area (Service News) at the full buildout potential, as the
rules require?
2. Please dimension all sides of the figure created by the permanent pool contour. Areas and
volumes cannot be verified at this time.
3. The wet detention supplement lists 14.75 as the outlet overflow. The overflow referred to is
for the volume associated with the State's requirements. Please revise this to 12.75, as
indicated in your calculations and plan details.
4. Locate the pond in a recorded access/drainage easement. Is the land the pond is sited on
owned by AAI? The permit will contain language that requires an easement to be recorded
prior to selling the land, or if access to the pond will be impeded.
127 Cardinal Dr. Eat., Wilmington, North Carolina 28405 Telephone 910-395,3900 FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

Mr. Tunstall
April 27, 1998
Stormwater Project No. SW8 980308
----------------------------------------------
Please note that this request for additional information is in response to a preliminary review. The
requested information should be received by this Office prior to May 27, 1998, or the application will be
returned as incomplete. The return of a project will necessitate resubmittal of all required items, including
the application fee.
If you have any questions concerning this matter please feel free to call me at [phone].
RSS/arl:
cc:
Sincerely,
Ms. Linda Lewis
Environmental Engineer
S:\WQS\STORMWAT\ADDINFO\980308.APR
Linda Lewis
Central Files
127 Cardinal Dr. Ext., Wilmington, North Carolina 28405 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper