SW8920215_HISTORICAL FILE_19920423

STORMWATER DIVISION CODING SHEET
POST-CONSTRUCTION PERMITS
PERMIT NO. SW8 9 2 a 215
DOC TYPE ❑ CURRENT PERMIT
❑ APPROVED PLANS
fl HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE o1423
YYYYMMDD

Cg� .
State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James G. Martin, Governor Bob Jamieson
William W. Cobey, Jr., Secretary April 23, 1992 Regional Manager
DIVISION OF ENVIRONMENTAL MANAGEMENT
Ms. D.L. Riddle, P.E.
Section Head, Stateside Branch
Acquisition Project Management Office
Department of the Navy
Atlantic Division
Naval Facilities Engineering Command
Norfolk, Virginia 23511-6287
Subject: Certification of Compliance
with Stormwater Regulations
Stormwater Project No. 920215
Field Maintenance Complex, III
Contract M62470-88-C-8110
Onslow County
Dear Ms . Riddle:
This Certification is pursuant to the revised application
for Field Maintenance Complex, III, Contract M62470-88-C-8110,
received on February 24 , 1992, with additional information
received on April 15; 1992 . Based on our review of the revised
project plans and specifications, we have determined that the
Field Maintenance Complex, III stormwater control system complies
with the Stormwater Regulations set forth in Title 15A NCAC
2H. 1003( i) . Revisions to the previous approved plan include
eliminate the vegetative filter, expanding the pond sutface area,
and elevation changes. The runoff will be treated in a detention
pond sized to achieve 90% reduction in Total Suspended Solids .
This Certification shall be effective from the date of
issuance until rescinded and accordingly rescinds project No.
910209 issued to you on April 5, 1991. The project shall- be
constructed and maintained in accordance with the plans and
specifications approved by the Wilmington Regional Office.
A professional engineer must certify that the stormwater
system has been installed in accordance with the approved plans
and specifications upon completion of construction. The attached
certification should be received by this Office within 30 days of
completion of construction.
-continued-
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 •Telephone [phone]• Fax 919-350,2004
An Equal Opportunity Affirmative Action Employer

Ms. Riddle
April 23, 1992
Stormwater No. 920215
---------------------
If you have any questions concerning this matter, please
call Ms . Alexis Finn or me at (919) 395-3900 .
Sincerely,
ALE
Dave Adkins
Water Quality Supervisor
DA/aif: 920215.APR
cc: G.R. Horne, P.E.
Marshall Batchlor, Onslow County Inspections
Alexis Finn
CWi-Tmington—Regional—Office
Central Files
2

DIVISION OF ENVIRONMENTAL MANAGEMENT
Evaluation of Stormwater Treatment and Disposal System
Draining to Waters Other Than Class SA
PROJECT DATA
Project Name: Field Maintenance Complex, III
Contract M62470-88-C-8110
Project Number: 920215
Location: Onslow County
Applicant: Ms . D.L. Riddle, P.E.
Mailing Address : Department of the Navy
Atlantic Division
Naval Facilities Engineering
Norfolk, Virginia 23511-6287
Submittal Date: February 24, 1992
Water Body Receiving Stormwater Runoff: Cogdells Creek
Classification of Water Body: "SC"
WET DETENTION POND EVALUATION
1. Yes No The design storage is for the runoff from all
impervious surfaces resulting from 1-inch of
rainfall and is located above the permanent
pool .
2 . Yes No The -permanent pool is designed for 90% total
suspended solid (TSS) removal. Therefore, no
vegetative filter is required.
3 . Yes No The runoff completely draws down to the
permanent pool in 5 days, but not less than 2
days .
4 . Yes No The mean depth of the permanent pool is a
minimum of 3 feet.
5. Yes No The inlet structure is designed to minimize
turbulence and short circuiting.
6 . Yes No An appropriate operation and maintenance plan
has been provided for the system.
-continued-
3

WET DETENTION POND EVALUATION CONTINUED
7 . Yes No THIS PROJECT MEETS THE STORMWATER CONTROL
REQUIREMENTS OF 15A NCAC 2H. 1003 (g) , (i) , (k)',
and ( 1) (For Yes, 1 through 7 must all be
circled Yes. )
Brief Explanation: This detention pond is designed to remove 90%
total suspended solids without the aide of a vegetative filter.
DIVISION OF ENVIRONMENTAL MANAGEMENT SIGN-OFF
Wilmington Regional Office
Date Individual Evaluating Form/Plans
2� 199 -L - -- - -
Date v Regio Water Quality Supervisor
cc: Applicant/WiRO/AIF/CF
4

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 the hereby state that, to
(Project Owner)
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 .
Signature
Registration Number
Date
5

Engineer's Certification /
I, /17icua� Ly vC�� as a duly registered
Professional Engineer in the Rh Carolina, having been
authorized to observe periodical) weekly/full time) the
construction of the project,
�2r'-T, No . 'IZ�L�S i Lr�Zn � (61/�/i h.�til�Y�Lcr (LY�7P�6� LL'
(Project) i✓(,zy10-Sg-C-�/U QNSu�w Nzy
for the MCfS C`A"'VP Ce-76UNGr hereby state that, to
(Project Owner)
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 .
Cd'27, P7'0 ZZ3 APei - I'19Z
Signature _""/'L"'Y �
Registration Number /8 S/3
Date Z-1 J &J 6 3
STPRIAWATER
i'i L G k � 1�l Is { ; ;
I�nU( JEAN 1 ? 1993 U
DIM
-�,1 4A q Z0 215
5

DEPARTMENT OF THE NAVI 4QR 1 Jr '
OFFICER IN CHARGE OF CONSTRL,�CTION �rmrry�ry
RESIDENT OFFICER IN CHARGE OF CONSTRUCTION O ,, 'lpy��
NAVAL FACILITIES ENGINEERING COMMAND CONTRACTS �M ftc4,
CAMP LEJF-UNE, NORTH CAROLINA 28542-5000 IN REPLY REFER To:
919-451-2583 Y
N62470-88-C-81t'
JAX/MCV/vm
13 APR 92
Ms. Alexis I. Finn
Environmental Engineer
Division of Environmental Management
State of North Carolina
Department of Environment, Health and Natural Resources
127 Cardinal Drive Extension
Wilmington, N. C. 28405-3845
Re: Stormwater Project No. 920215 Field Maintenance Complex, III,
Marine Corps Base, Camp Lejeune, North Carolina
(Onslow County)
Dear Ms. Finn
Pursuant to your letter dated March 23, 1992 please find enclosed the revised plan
for the Stormwater Detention Pond for the referenced permit. This office agrees
with your evaluation that deletion of the vegetative filter requires enlargement of
the pond. This has been accomplished by simply extending the pond to a total
bottom length of 358 ft.
We trust that these changes meet with your approval and would request that such
action be accomplished as soon as possible. For further information, please
contact the undersigned at 919-451-2583.
Sincerely,
VANN MARSHBURN P.E.
Supervisory Assistant Resident
Engineer in Charge of Construction
Copy to:
LANTDIV Code 0525
APR 1 5 1992 U
D. Eih
.oj #9aozc5 --

Oita
State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James G. Martin, Governor Bob Jamieson
William W. Cobey, Jr., Secretary March 23, 1992 Regional Manager
DIVISION OF ENVIRONMENTAL MANAGEMENT
Mr. G.R. Horne, P.E.
Department of the Navy
Naval Facilities Engineering Command Contracts
Cam?LeJeune, North Carolina 28542-5000
Subject: Additional Information
Stormwater Project No. 920215
Field Maintenance Complex, III
Contract N62470-88-C-8110
Onslow County
Dear Mr. Horne:
The Wilmington Regional Office received a revised Stormwater
Submittal for the Field Maintenance Complex, III, Contract
N62470-88-C-8110, on February 24, 1992 . A preliminary review of
that information has determined that the submittal for the
subject project is not complete. The following information is
needed to continue the stormwater review:
1 . North Carolina registered Professional Engineers seal
on revised plans which include printed elevation
revisions and revised effluent routing.
2 . A result of eliminating the vegetative filter is
additional required surface area of the permanent pond.
I calculate a deficit of 9867 sf. Please refer to the
SA/DA table for 90% total suspended solid removal.
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 April 24, 1992, or
the submittal will be returned as incomplete.
-continued-
127 Cardinal Drive Extension, Wilmington, N.C. 29405-3845•Telephone [phone]• Fax [phone]
An Equal Opportunity Affirmative Action Employer

_j
Mr. Horne
March 23, 1992
Stormwater No. 920215
---------------------
If you have any questions concerning this matter, please
call me at (919) 395-3900.
SincererYy,
Ms . Alexis I . Finn
Environmental Engineer
DA/aif: 920215 .MAR
cc: (2) Alexis Finn
Central Files

. - •. - 1Ns•..6F�c�EN'r SA
also Prod�o6 o..flcF p•P< d�1z::1\
•n ft v.s.o•,s o{ c4..o�ko-r.A
.�er...dl
?roject #: 910209 File Hame; DET209 Reviewer:Alexis Finn
Project Nave: FIELD HAIHTEHANCE COHPLER Date: 03/23/92 .
xwvxuttRrux+ MOETEHTION P0f0 AHALYSISmrxxx�rurm�i�tmrrtrrtri
fatal Size Area, TA: TA- 866844 ft'2 tt
[TA (acre)] / (43560 ft'2/acrej= TA= 19.9 Acres
ioLal Drainage Area, DA; DA- 684976 ft'2 tt
(CA (acre)] / (43560 ft"2/aereej= DA- 15.72488 Acres
1HPEE'iIOfJC aLRF6CE AREA CALCULATIONS;
Strntura Surface Area, A Runoff Coef,, C
sf
Euiloin;s: 342125 1 Adjusted Surface Area - A I C 342125 ft-2 #t
ParHiig;sidewall:s/streets; 342851 0.95 Adjusted Surface Area - A 4 C 325708.4 ft-2 It
Outparcels; 0 03 Adjusted Surface Area - A C 0 ft"2 t#
Green Areas: 0 0.2 Adjusted Surface Area A = C = 0 ft'2 It
TOTAL; 667833.4 ft'2 It
Percent impervious, ti: note: W(HILDING + PARKING.,)- 684976 sf 15.72488 Acres
(SA/TA];100-
( 684916 / 866844 ]r100- %I= 79,02%%
Note: If %I < 30% check Density Option,
If %I > 30%, require engineered system to minimize non-point stream degradation.
PO"iD 1I2I,^!6;
H�r,imum Required Storage Volume, VOLreq; note: SA has been multiplied by runoff coefficients
(SA (ft'2) K (I inch of runoff) 0 (1 ft/12 inch)]-
( 567833,4 ft'2 v 1 inch 0,083333 ft/inch]: VOLreq= 55652.78 ft'3
##
PO'r1L s'ItIHG,
dcttom Elevation, Elb: ELb 7 ft It
Permanent Poal Elevation, ELpp: ELpp- 10 ft It
Arta of Permanent Pool, App. App - __&Wt ft'2 tt
bsa93
Storage Pond Elevation, Esp: ELsp= 11 ft t#
Area cr Storage Pond, Asp; Asp - —60 ft'2 t#
�tbec.
Ruoatf Storage Depth, d:
(via project engineer's design; d = ELsp ELpp) d= I ft I
Storage Volume Provided, VOLpro: Side Slope; 3:1 tilt
Volume I, V1= App x d - 54521 ft'2 ; I ft V1- 54521 ft"3
Volume 2, V2= (Asp App) x d v 0.5 _ V2- 5192.5 ft'3
VOLpro : VI + V2 - 54521 ft'3 + 5192.5 ft'3 VOLpro- 59713.5 ft'3
Note: '1OLreq < VOLpro; excess storage is available, therefore Pond Size is Acceptable, <...
% Excess Storage -(VOLreq / VOLpro) 1 100 - % Excess Storage 6,805<-,-r-----

DETENTION POND ANALYSIS CONTINUED; PAGE TWO
III R!iINANT POOL:
Perm. Pool at Normal Level= 10 ft
Ooitom of Pond = 7 ft
Depth Proaided, D = 3 ft <----- okay, depth > OR = 3 ft.
SA/DA r,AICULATI0I1:
By Chart Y4; @ 90% TSS:
Depth, D 3 fti�
t Impervious = 19.02%
DA - 15.12488 Acres Where DA is the Draninage Area
SA/DA t = 9,4 ittl
Area of Permanent Pool Required = (SA/DA ti) t DA
Area of Permanent Pool Required = 9.4 v 15.33134 Acres
Area of Permanent Pool Required = 1.418139 Acres
Area of Permanent Pool Required 64387.14 ft"2
Area of PERNAIIENT POOL Required- 64387.74 sf < provided area of 54521 sf <-•WARNING: insufficient
ORIFICE / GUILET sI2IhG:
VOLpro = 59713.1
Orifice outflow, 2 Day Drawdown Volpro/[(2 day) $ (86400 sec/day)]
Orifice outflow, 2 Day Drawdown 59713.5 ft"3 / 172800 sec = Q2= 0,345564 cfs
Orifice C.S. Area, A:
A= Q/[Cd((2gh)^0.5))j
A= 0,345564 / [0.6$((2132.211.0)-0,5))]; A2= 0.071768 ft'2
A2= 10,33468 inch'2
Pipe diameter, d: d2= 3.627468 inch
Note: Read, h = naximum pond leveb. permanent pond level = I ft
Coeficient of Discharge, Cd = 0.6
Orifice outflow, 5 Day Drawdown = Volpro/[(5 day) 1 (86400 sec/day)]
Orifice outflow, S Day Drawdown = 59111.5 ft"3 / 432000 sec = Q5= 0,138225 cis
Orifice C.S, Area, A;
A- Q/ICd((2gh)'0,5))j
A= 0.138225 / (0.V((2t32.2t1.0)-0.5))]= AS= 0,028707 ft'2
A5= 4.133872 inch"2
Pipe diameter, d: d5= 2,294212 inch
r,uEry; d5 < dprovided < d2 : 2.3 < 5.0 < 3.6 <------WARNING...; Orifice is sized incorrectly.

jR c1 VED
DEPARTMENT OF THE NAVY FEB 1
OFFICER IN CHARGE OF CONSTRUCTION
JA RESIDENT OFFICER IN CHARGE OF CONSTRUCTION rjminSWn Regional OFfieo
NAVAL FACILITIES ENGINEERING COMMAND CONTRACTS DEM
CAMP LEJEUNE,NORTH CAROLINA 28842-5000 IN REPLY REFER.o
;t
[phone]
N62470-88-C-8110
JAX/A 12/ml
18 FEB 92
State of North Carolina
Department of Environment, Health and Natural Resources
Wilmington Regional Office
7225 Wrightsville Avenue
Wilmington, North Carolina 28403-3696
(Attn: Division of Environmental Management, Mr. Dave Adkins)
Re: Contract N62470-88-C-8110, Field Maintenance Complex, Increment
III, Marine Corps Base, Camp Lejeune, NC
Gentlemen:
The referenced contract storm water control system includes the construction of a
detention pond with a spillway into Cogdell's Creek. The system was certified by
your letter dated 5 April 1991, copy enclosed.
WeWrepos-e to raise-the-elevations 6f"thedeCention-pond:and-all-associated)
lstructures-West'of marihol.e NSMH=2-1 y_two_feef. The proposed elevation changes
are detailed on the enclosed revised plans, sheets C-10A and C-11A. The volume
and thus treatment capabilities will remain unchanged.
Site observation, as well as topographical measurements indicate that the water
level of Cogdell's Creek during a storm would most likely exceed the detention
pond outlet elevation as originally proposed. This would allow sediment to enter
the detention pond from the Cogdells Creek flow. The entire area from just North
of the Outlet Control Structure to Cogdell's Creek should be considered the creek
basin. &D ige eefore,-ia=is—recommendecLthe=originally-proposed=drainage-swale=with�
ton e�check-dam-in-thi s-are a-be-omitted? Construction as specified in the contract
in this sensitive area could prove to be detrimental.
It is requested that you promptly review this proposal and provide written
approval to raise the detention system two feet and the omission of the outlet
drainage swale. Should you have any questions, contact the and s}tnjd.
Sincerely, K DU
7. (�� FEB 2 4 1992
G. R. Horne, P.E. D E M
Supervisory GeneralcFrigineer�aoz/S'
Enclosure
Copy to:
LANTDIV, Code 0525

State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James G. Martin, Governor Bob Jamieson
William W. Cobey, Jr., Secretary April 5, 1991
Regional Manager
DIVISION OF ENVIRONMENTAL MANAGEMENT
Ms. D.L. Riddle, P.E.
Section Head, Stateside Branch
Acquisition Project Management Office
Department of the Navy
Atlantic Division
Naval Facilities Engineering Command
Norfolk, Virginia 23511-6287
Subject: Certification of Compliance
with Stormwater Regulations
Stormwater Project No. 910209
Field Maintenance Complex III
Onslow County
Dear Ms. Riddle:
This Certification is pursuant to the application for
the Field Maintenance Complex III received on February 15, 1991,
with additional information received April 4, 1991. Based on our
review of the project plans and specifications, we have
determined that the stormwater control system complies with the
Stormwater Regulations set forth in Title 15A NCAC 2H. 1003 (i) .
The runoff will be treated in a detention pond sized to achieve
85% reduction in Total Suspended Solids.
This Certification shall be effective from the date of
issuance until rescinded. The project shall be constructed and
maintained in accordance with the plans and specifications
approved by the Wilmington Regional Office.
A professional engineer must certify that the
stormwater system has been installed in accordance with the
approved plans and specifications upon completion of
construction. The attached certification should be received
by this Office within 30 days of completion of d s6:-Uctik'i L b
Continued
�unU( FEB 2 4 1992
D E M
7125 Wrightsville Avenue, Wilmington, NC. 28-f033696 • Telephone [phone] • Fax-913�558STZ�'�� �� �
An Equal Opportunity Affirmative Action Employer

, ,Ms; •Riddle
April 5, 1991
Page Two
----------------
If you have any questions concerning this matter, please
call Alexis Finn or me at (919) 256-4161.
Sincerely,
Dave Adkins
Water Quality Supervisor
DA/AIF: 910209.APR
cc: J. Steven Porter, P.E.
Bill Mills
Alexis Finn
Wilmington Regional Office
Central Files

DIVISION OF ENVIRONMENTAL MANAGEMENT
Evaluation of Stormwater Treatment and Disposal System
Draining to Waters Other Than Class SA
PROJECT DATA
Project Name: Field Maintenance Complex III
Project No. : 910209
Location (County, Township/Municipality, Address) :
Camp Lejuene
Onslow County
Applicant Name: Mr. J. Steven Porter, P.E.
Mailing Address: Piedmont Olsen Associates
Post Office Box 93
Greenville, North Carolina 27835-0093
Submittal Date: February 15, 1991
Water Body Receiving Stormwater Runoff: Cogdells Creek
Classification of Water Body: SC
WET DETENTION POND EVALUATION
1. Yes No The design storage is for the runoff from all
impervious surfaces resulting from 1-inch of
rainfall and is located above the permanent
pool.
2. Yes No The permanent pool is designed for 85% TSS
removal.
3. Yes No The runoff completely draws down to the
permanent pool in 5 days, but not less than 2
days.
4. Yes No The mean depth of the permanent pool is a
minimum of 3 feet.
5. Yes No The inlet structure is designed to minimize
turbulence and short circuiting.
6. Yes No All overflow and discharge flows through a
vegetative filter at least 30 feet in length.
7. Yes No A method is used to provide even distribution of
runoff over the length of the vegetative filter.
Continued

WET DETENTION POND EVALUATION CONTINUED
8. Yes No The slope and width of the vegetative filter
provides non-erosive flow for the 10-year and
24-hour storm with a 10-year, 1-hour intensity.
9. Yes No The vegetative filter has a slope of 5% or less.
10. Yes No The vegetative filter is natural, grassed or
artificially planted wetland vegetation.
11. Yes No An appropriate operation and maintenance plan
has been provided for the system.
12. Yes No THIS PROJECT MEETS THE STORMWATER CONTROL
REQUIREMENTS OF 15A NCAC 2H. (g) , (i) , (j ) , (k) ,
and (1) (For Yes, 1 through 11 must all be ,
circled Yes. )
Brief Explanation: This detention pond is designed to remove 85%
total suspended solids and will therefore be operated with a
vegetative filter.
DIVISION OF ENVIRONMENTAL MANAGEMENT SIGN-OFF
Wilmington Regional office
Date Individual Evaluating Form/Plans
41L )�-a A&..
Date 'Regional Water Quality Supervisor
cc: Applicant/WiRO/Mills/CF

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