SW8080202_HISTORICAL FILE_20080206

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 080202
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
2002 020ko
YYYYMMDD

9
� —i
February 6, 2008
Todd Best, Manager Facilities and Maintenance
GE Hitachi Nuclear Energy
3901 Castle Hayne Road
Wilmington, NC 28401
Subject: Stormwater Permit No. SW8 080202
GE — FGE Office Expansion
High Density Project
New Hanover County
Dear Mr. Best:
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins Director
Division of Water Quality
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for GE — FGE Office Expansion on February 6, 2008. 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 080202
dated February 6, 2008, for the construction of the subject project.
This permit shall be effective from the date of issuance until February 6, 2018, and shall be
subject to the conditions and limitations as specified therein. Please pay special attention to
the Operation and Maintenance requirements in this permit. Failure to establish an adequate
system for 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,GKris Baker, or me at [phone].
Si erely,
Edward Beck
Regional Supervisor
Surface Water Protection Section
ENB/csb: S:\WQS\STORMWAT\PERMIT\080202.feb08
cc: Mark Hargrove, P.E., Withers and Ravenel
New Hanover County Building Inspections
City of Wilmington Stormwater Services
New Hanover County Engineering
Chris Baker
Wilmington Regional Office oNr`thCarolina
Central Files Jlatura!!y
North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone [phone] Customer Service
Wilmington Regional Office - Internet: w�.nc,vateroualityorg Fax [phone]

State Stormwater Management Systems
Permit No. SW8 080202
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
Todd Best and GE Hitachi Nuclear Energy
GE — FGE Office Expansion
Castle Hayne Road, New Hanover County
FOR THE
construction, operation and maintenance of a sand filter 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 February 6, 2018, and shall
be subject to the following specified conditions and limitations:
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 in Section 1.6 on page 3 of this permit. The stormwater
control has been designed to handle the runoff from 3,200 square feet of
impervious area. This basin must be operated with a 30' vegetated filter.
3. The tract will be limited to the amount of built -upon area indicated on page 3 of
this permit, and per approved plans.
4. All stormwater collection and treatment systems must be located in either
dedicated common areas or recorded easements. The final plats for the project
will be recorded showing all such required easements, in accordance with the
approved plans.
5. The runoff from all built -upon area within the permitted drainage area of this
project must be directed into the permitted stormwater control system.
Page 2 of 7

State Stormwater Management Systems
Permit No. SW8 080202
6. The following design criteria have been provided in the sand filter and must be
maintained at design condition:
a. Drainage2Area, acres:
Onsite, ft :
Offsite, ft2:
b. Total Impervious Surfaces, ft2:
C. Design Storm, inches:
d. Sediment Chamber
Surface Area, ft
e. Sand Filter Surface Area, ft2:
f. Bottom Elevation, FMSL:
g. Bypass Weir Elevation, FMSL:
h. Permitted Storage Volume, ft3:
i. Type of Soil:
j. Expected Infiltration Rate, in/hr:
k. Seasonal High Water Table, FMSL:
I. Time to Draw Down, hours:
M. Receiving Stream/River Basin:
n. Stream Index Number:
o. Classification of Water Body:
II. SCHEDULE OF COMPLIANCE
0.21
3,200
None
3,200
1.5
72
72
37.7
40.2
380
Engineered Sand
3.5
N/A (closed system)
40
UT to NE Cape Fear / Cape Fear
18-74-(52.5)
"C:SW"
1. The stormwater management system shall be constructed in its entirety,
vegetated and operational for its intended use prior to the construction of any
built -upon surface.
2. During construction, erosion shall be kept to a minimum and any eroded areas of
the system will be repaired immediately.
3. The permittee shall at all 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 slopes and the vegetated filter.
d. Immediate repair.of eroded areas.
e. Maintenance of all slopes in accordance with approved plans and
specifications.
f. Debris removal and unclogging of bypass structure, infiltration media, flow
spreader, catch basins, piping and vegetated filter.
g. A clear access path to the bypass structure must be available at all times.
Page 3 of 7

State Stormwater Management Systems
Permit No. SW8 080202
4. 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.
5. The facilities shall be constructed as shown on the approved plans. 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.
6. Upon completion of construction, prior to issuance of a Certificate of Occupancy,
and prior to operation of this permitted facility, a certification must be received
from an appropriate designer for the system installed certifying that the permitted
facility has been installed in accordance with this permit, the approved plans and
specifications, and other supporting documentation. Any deviations from the
approved plans and specifications must be noted on the Certification. A
modification may be required for those deviations.
7. If the stormwater system was used as an Erosion Control device, it must be
restored to design condition prior to operation as a stormwater treatment device,
and prior to occupancy of the facility.
8. Access to the stormwater facilities shall be maintained via appropriate
easements at all times.
9. The permittee shall submit to the Director and shall have received approval for
revised plans, specifications, and calculations prior to construction, for any
modification to the approved plans, including, but not limited to, those listed
below:
a. Any revision to any item shown on the approved plans, including the
stormwater management measures, built -upon area, details, etc.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area or to the
drainage area.
e. Further subdivision, acquisition, lease or sale of all or part of the project
area. The project area is defined as all property owned by the permittee,
for which Sedimentation and Erosion Control Plan approval or a CAMA
Major permit was sought.
f. Filling in, altering, or piping of any vegetative conveyance shown on the
approved plan.
10. The permittee shall submit final site layout and grading plans for any permitted
future areas shown on the approved plans, prior to construction.
11. 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.
12. 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.
Page 4 of 7

State Stormwater Management Systems
Permit No. SW8 080202
III. GENERAL CONDITIONS
This permit is not transferable except after notice to and approval by the Director.
In the event of a change of ownership, or a name change, the permittee must
submit a formal permit transfer request to the Division of Water Quality,
accompanied by a completed name/ownership change form, 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. The permittee is responsible for compliance with all permit
conditions until such time as the Division approves the transfer request.
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) having 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 permittee grants DENR Staff permission to enter the property during normal
business hours for the purpose of inspecting all components of the permitted
stormwater management facility.
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.
7. Unless specified elsewhere, permanent seeding requirements for the stormwater
control must follow the guidelines established in the North Carolina Erosion and
Sediment Control Planning and Design Manual.
8. Approved plans and specifications for this project are incorporated by reference
and are enforceable parts of the permit.
9. The permittee shall notify the Division any name, ownership or mailing address
changes within 30 days.
Permit iss=CAROLIN&SWIRJDNVENTAL
6th day of February, 2008.
NO MANAGEMENT COMMISSION
Division of Water Quality
By Authority of the Environmental Management Commission
Page 5 of 7

State Stormwater Management Systems
Permit No. SW8 080202
GE — FGE Office Expansion
Stormwater Permit No. SW8 080202
New Hanover County
Designer's Certification
I, , as a duly registered
in the State of North Carolina, having been authorized to observe (periodically/ weekly/
full time) the construction of the project,
(Project)
for
(Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
Page 6 of 7

State Stormwater Management Systems
Permit No. SW8 080202
Certification Requirements:
1. The drainage area to the system contains approximately the permitted
acreage.
2. The drainage area to the system contains no more than the permitted
amount of built -upon area.
3. All the built -upon area associated with the project is graded such that the
runoff drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The bypass structure weir elevation is per the approved plan.
6. The bypass structure is located per the approved plans.
7. A Trash Rack is provided on the bypass structure.
8. All slopes are grassed with permanent vegetation.
9. Vegetated slopes are no steeper than 3:1
10. The inlets are located per the approved plans and do not cause short-
circuiting of the system.
11. The permitted amounts of surface area and/or volume have been
provided.
12. All required design depths are provided.
13. All required parts of the system are provided.
14. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
New Hanover County Building Inspections
Page 7 of 7

DWQ USE ONLY
Date Received
Fee Paid
Permit Number
02, oC� 1 2c�=, 1%ODO•—
Ckna. 23q8
Gd80fiT Zo��
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
I. GENERAL INFORMATION
1. Applicants name (specify the name of the corporation, individual, etc. who owns the project):
GE Hitachi Nuclear Energy
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Todd Best - Manager Facilities and Maintenance
3. Mailing Address for person listed in item 2 above:
City:Wilmington State:NC Zip:28401
Phone: (910 ) 675-6810 Fax: [phone]
Email:[e-mail]
4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
GE - FGE Office Expansion
5. Location of Project (street address):
3901 Castle Hayne Road
City: W i Imington County:NC
6. Directions to project (from nearest major intersection):
North two miles on Castle Hayne Road from the intersection of N. Kerr Ave. & Castle Hayne Road
7. Latitude:34 19' 27" Longitude:77 56' 46" W of project
8. Contact person who can answer questions about the project:
Name:Mark Hargrove Telephone Number: (910 ) 256-9277
Email:[e-mail]
II. PERMIT INFORMATION:
1. Specify whether project is (check one):
o
❑Renewal ❑Modification
Form SWU-101 Version 8.07 Page I of

Z If this application is being submitted as the result of a renewal or modification to an existing permit, list the
existing permit number and its issue date (if known)
3. Specify the type of project (check one):
❑Low Density []High Density ®Redevelop ❑General Permit ❑Universal SMP ❑Other
4. Additional Project Requirements (check applicable blanks):
❑LAMA Major ®Sedimentation/Erosion Control 0404/401 Permit ❑NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
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 the use of a sand filter to treat the roof water
2. Stormwater runoff from this project drains to the Cave Fear River basin.
3. Total Site Area: 0.21 acres 4. Total Wetlands Area: 0 acres
5. 100' Wide Strip of Wetland Area: 0 acres (not applicable if no Wetlands exist on site)
6. Total Project Area**:0.21 acres 7. Project Built Upon Area:35 %
8. How many drainage areas does the project have?1
9. Complete the following information for each drainage area. If there are more than two drainage areas in the
project, attach an additional sheet with the information for each area provided in the same format as below.
Basin Information
Drainage Area 1
Drainage Area 2
Receiving Stream Name
Unamed trib. to NE Cape Fear River
Stream Class & Index No.
Class C, SW,18-74-(52.5)
Drainage Area (so
3,200
Existing Impervious* Area (so
0
Proposed Impervious*Area (so
3,200
% Impervious* Area (total)
100%
Impervious* Surface Area
Drainage Area 1
Drainage Area 2
On -site Buildings (sf)
3,200
On -site Streets (so
0
On -site Parking (so
0
On -site Sidewalks (sf)
0
Other on -site (so
0
Off -site (sf)
Total (so:
3,200
* 6npervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
**Total project area shall be calculated based on the current policy regarding inclusion of Wetlands in the built upon area
percentage calculation.
Form SWU-101 Version 8.07 Page 2 of

10. How was the off -site impervious area listed above
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
One of the following deed restrictions and protective covenants are required to be recorded for all subdivisions,
outparcels and future development prior to the sale of any lot. If lot sizes vary significantly, a table listing each lot
number, size and the allowable built -upon area for each lot must be provided as an attachment.
Form DRPC-1
High Density Commercial Subdivisions
Form DRPC-2
High Density Developments with Outparcels
Form DRPC-3
High Density Residential Subdivisions
Form DRPC-4
Low Density Commercial Subdivisions
Form DRPC-5
Low Density Residential Subdivisions
Form DRPC-6
Low Density Residential Subdivisions with Curb Outlets
By your signature below, you certify that the recorded deed restrictions and protective covenants for this
project shall include all the applicable items required in the above form, that the covenants will be binding on
all parties and persons claiming under them, that they will run with the land, that the required covenants
cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the
sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the status
and availability of these forms.
Form SW401-Low Density
Low Density Supplement
Form SW401-Curb Outlet System
Curb Outlet System Supplement
Form SW401-Off-Site System
Off -Site System Supplement
Form SW401-Wet Detention Basin
Wet Detention Basin Supplement
Form SW401-Infiltration Basin
Infiltration Basin Supplement
Form SW401-Infiltration Trench
Underground Infiltration Trench Supplement
Form SW401-Bioretention Cell
Bioretention Cell Supplement
Form SW401-Level Spreader
Level Spreader/Filter Strip/Restored Riparian Buffer Supplement
Form SW401-Wetland
Constructed Wetland Supplement
Form SW401-Grassed Swale
Grassed Swale Supplement
Form SW401-Sand Filter
Sand Filter Supplement
Form SWU-101 Version 8.07 Page 3 of 4

VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Water Quality (DWQ).
A complete package includes all of the items listed below. The complete application package should be
submitted to the appropriate DWQ Office. (Appropriate office may be found by locating project on the
interactive online map at http://h2o.enr.state.nc.us/su/msi maps.htm)
Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initial
• Original and one copy of the Stormwater Management Permit Application Form
Al�
• Original and one copy of the Deed Restrictions & Protective Covenants Form
• Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP
AtN
• Permit application processing fee of $505 ($4,000 for Express) payable to NCDENR
=t N
• Calculations & detailed narrative description of stormwater treatment/management
M N
• Copy of any applicable soil report
MN
• Three copies of plans and specifications (sealed, signed & dated), including:
iU
- Development/Project name
- Engineer and firm
-Legend
- North arrow
- Scale
- Revision number & date
- Mean high water line
- Dimensioned property/project boundary
- Location map with named streets or NCSR numbers
- Original contours, proposed contours, spot elevations, finished floor elevations
- Details of roads, drainage features, collection systems, and stormwater control measures
- Wetlands delineated, or a note on plans that none exist
- Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
- Drainage areas delineated
- Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent (individual or firm):Withers & Ravenel, Inc.
Mailing Address:7040 Wrightsville Avenue, Suite 101
City:Wilmington State:NC Zip:28403
Phone: (910 ) 256-9277 Fax: [phone]
Email:[e-mail]
VIII. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General Information, item 2) Todd Best
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H .1000.
Date: Z _ S — o is
Form SWU-101 Version 8.07 Page 4 of

* ,
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TRANSACTION REPORT
FEB-07-2008 THU
FOR: NCDENR 9103502004
SEND
DATE START RECEIVER TX TIME PAGES TYPE NOTE
P. 01
09:32 AM
>K
M# DP
FEB-07 09:28 AM 93626810 4'47" 16 FAX TX OK
741
TOTAL 4M 47S PAGES: 16
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NCDENR
State of North Carolina
Department of Environment and Natural Resources
Wilmington Regional Office
Michael F. Easley, Governor William G. Ross Jr., Secretary
FAX COVER SHEET
Data: February 7, 2008 No. Of Pages: (excluding cover) 15
To: Todd Best, Manager Facilities From: Azita Sartipi
CO: GE Hitachi Nuclear Energy CO: Express Permitting
Fax No. 910-362-6810
Tel No. 910-675-6910 Tel No.: 910-796.7500 ext. 7377
FAX No. 910-350-2004
E-mail: azita.eartipinncmail.net
REMARKS: Permit No. SW8080202 / GE—FGE Office Expauston
Dear Mr. Hargrove,
I will mail you a hard copy of the following pages. Please do not hesitate to contact me if
you have any questions.
Best regards,
. Azita
IV Cudinvl ndve Essen ., W(Imh jw, N.C. 28405.384S Telvphooe [phone] F. (910) 350,2004
Ae Equol Opportunity Affi m dve Ace.. Employer

TRANSACTION REPORT
FEB-07-2008
FOR: NCDENR 9103502004
P. 01.
U !091127 IAM
SEND
�I �
DATE START RECEIVER TX TIME PAGES TYPE NOTE M# DP
t.
FEB-07 09125 AM 92562584 2'27" 16 FAX TX OK 740
TOTAL 2M 27S PAGES: 16
k��
NCDENR;
State of North Camlina
Department of Environment and Natural Resources
Wilmington Regional,Office 1
Michael F. Easley, Governor William G. Ross Jr., Secretary
' FAX COVER SHEET
Date: Febmary7, 2008 No. Of Pages: (excluding cover) 15
To: Mark Hargrove, P.E. From: Azita Sartipi
CO:Withers & Ravenel CO: Express Permitting
Fax No. 910-256-2584
Tel No, 910-256-9277 Tel No.: 910-796-7500 ext. 7377
FAX No. 910-350-2004
E-mail: azitasartini(a>rncmail.ntt
REMARKS: Permit No. SW8080202 / GE— FGE Office Expansion
Dear Mr. Hargrove,
I will mail you a hard copy of the following pages. Phase do not hesitate to contact me if
you have any questions.
Best regards,
. Azita
I
, I
I
127 CSMinsl ntive Extension, Wilmingon, NC 28405J345 Telcphoae [phone] Fax [phone]
An Equal Oppommity Anlrmadve Action Employer
I
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SAX
AX
NCDiENR
State of North Carolina
Department of Environment and Natural Resources
Wilmington Regional Office
Michael F. Easley, Governor William G. Ross Jr., Secretary
FAX COVER SHEET
Date: February 7, 2008 No. Of Pages: (excluding cover) 15
To: Mark Hargrove, P.E. From: Azita Sartipi
CO: Withers & Ravenel CO: Express Permitting
Fax No. 910-256-2584
Tel No. 910-256-9277 Tel No.: 910-796-7500 ext. 7377
FAX No. 910-350-2004
E-mail: azita.sartipi chi ncmail.net
REMARKS: Permit No. SW8080202 / GE — FGE Office Expansion
Dear Mr. Hargrove,
I will mail you a hard copy of the following pages. Please do not hesitate to contact me if
you have any questions.
Best regards,
Azita
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer .

A
MR
NCDENR
State of North Carolina
Department of Environment and Natural Resources
Wilmington Regional Office
Michael F. Easley, Governor William G. Ross Jr., Secretary
FAX COVER SHEET
Date: February 7, 2008 '
To: Todd Best, Manager Facilities
CO: GE Hitachi Nuclear Energy
Fax No. 910-362-6810
Tel No. 910-675-6810
No. Of Pages: (excluding cover) 15
From: Azita Sartipi
CO: Express Permitting
Tel No.: 910-796-7500 ext. 7377
FAX No. 910-350-2004
E-mail: azita.sartipi cr,ncmail.net
REMARKS: Permit No. SW8080202 / GE — FGE Office Expansion
Dear Mr. Hargrove,
I will mail you a hard copy of the following pages. Please do not hesitate to contact me if
you have any questions.
Best regards,
Azita
127 Cardinal Drive Extension, Wilmington, N.C. 28405-3845 Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer

WITHERS & RAVENEL
ENGINEERS IPLANNERS ISURVEYORS
7040 Wrightsville Avenue, Suite ioi
WILMINGTON, NORTH CAROLINA,28403
[phone]
FAX [phone]
To: NC Division of Water Quality
WE ARE SENDING YOU
❑ Shop Drawings
❑ Copy of Letter
❑ Attached
❑ Prints
❑ Change order
LETTER OF TRANSMITTAL
DATE 2/0/08
JOB NO. O O 11 .00
1
ATTENTION Chris Baker
PHONE#
RE: GE — FGE Office Expansion
❑ Underseparate covervia
® Plans ❑ Samples
❑ Diskette ❑
the following items:
❑ Specifications
COPIES
DATE
NO.
DESCRIPTION
z
Sets of plans for stormwater permit
2
Copies of stormwater calculations
2
Stormwater Management Permit Application Form (one original, one copy)--
2
Copies of Sand Filter Supplement
i
Application fee for $ 000.00 for express permitting
i
Copy of Wetland Letter
2
Copies of 0&M Agreement (One original & one copy)
THESE ARE TRANSMITTED as checked below:
® For approval ❑ Approved as submitted
❑ For your use ❑ Approved as noted
❑ As requested ❑ Returned for corrections
❑ For review and comment ❑
❑ FOR BIDS DUE 20 ❑ PRINTS RETURNED AFTER LOAN TO US
REMARKS:
For a
COPYTO: File, Billy Hines
❑ Resubmit
❑ Submit
❑ Return
copies for approval
copies for distribution
corrected prints
If enclosures are not as noted, kindly notify us at once.

GE - HITACHI NUCLEAR ENGERGY
GE - FGE OFFICE EXPANSION
STORM WATER CALCULATIONS
FOR
NCDWQ
February 5, 2008
SEAL .`
19742 �y
FNGIOS Q
RI '
Withers & Ravenel, Inc.
7040 Wrightsville Avenue, Suite 101
Wilmington, North Carolina 28403
[phone]

STORM WATER NARRATIVE
GE - FGE OFFICE EXPANSION
WILMINGTON, NC
FEBRUARY 5, 2008
The address of the site is 3901 Castle Hayne Road, Wilmington, NC. The General Electric
site encompasses approximately 1,621 acres. The project involves constructing a + 3,200
sf building expansion over an existing asphalt and stoned area at the GE facility. The
project limits is 0.21 acres. Stormwater runoff from the rooftop will be directed to a
proposed sand filter for treatment before the runoff enters a proposed and existing grassed
swale. The soils report from ECS, LLP indicated that the soils were not suitable for
infiltration due to a poor infiltration rate.
There is approximately 1,276 sf of existing asphalt that will be removed and this area will
now be grassed.
The project limits of this project is considered the building expansion and the area
downstream of the building that includes the sand filter area and grassed swale.
Total Project Area = 9,042 SF = 0.21 AC
Total Proposed Impervious Surface Area Draining to Sand Filter:
Proposed Building = 3,200 sf
Required Storage for 1.5-Inch of Runoff For Sand Filter: (use Schueler Method)
= 0.05 + 0.009 (1)
= 0.05 + 0.0090 00) = 0.95
_ (1.5")(0.95)(1/12)(3,200)
= 380 cf - water quality volume
Adjusted Water Quality Volume:
= 380*.75 = 285 cf
Volume Provided: assume 6-inch depth over top of sand filter for volume calculations
_ (4*18*0.5)+(4*18*3.5) = 288 cf storage provided

GE - FGE OFFICE EXPANSION
SAND FILTER CALCULATIONS
Imp = 3200 sf
Rv = 0.05+.9*100 =
WQV = 380.00 ft"'
WQVadj = 285.00 ft"'
FEBRUARY 5, 2008
0.95
hmax
WQVadj
As+Af
(ft)
(ft"')
(ft"')
1
285.00
285.00
2
285.00
142.50
3
285.00
95.00
4
285.00
71.25
5
285.00
57.00
As = 25.12 ft" required
Af = 32.70 ft" required
Use chambers 4' wide and 18' deep -- 72 sf
Used Hmax of 2 ft — need 142.5 ft"
Provided 144 sf - OK
Width Ht over SF
4 0.5
Length Sed Depth
18 3.5
Total volume provided exceeds volume required
Total Volume
288

RE: GE- FGE Office Expansion
Subject: RE: GE- FGE Office Expansion
From: "Mark Hargrove" <[e-mail]>
Date: Fri, 1 Feb 2008 15:52:11 -0500
To: "Janet Russell" <[e-mail]>
we will be there on Feb 6 at 8:30 am.
-----Original Message -----
From: Janet Russell [ mailto:[e-mail]
Sent: Friday, February 01, 2008 3:50 PM
To: Mark Hargrove
Subject: GE- FGE Office Expansion
Mark, please confirm by return email that you're coming in with your
submittal on 2/6/08 at 8:30. I need an email confirmation to put with
the Express package. Also, for future projects and times when you need
a scoping meeting - please let me know. The new Express form has a
place to check "scoping" and then we're able to enter it into the
computer tracking and get "credit" for our weekly accounting of how many
meetings we had. Right now it's a numbers game and every meeting
counts. Maybe every business is like that.
Thanks,
Janet
I of 1 2/1/2008 3:53 PM

7,7 , .,*
•r
WITHERS &- RAVENEL
ENGINEERS IPLANNERS ISURVEYORS
January 31, 2008
Mr. Chris Baker
NC Division of Water Quality
Stormwater Permitting Unit
127 Cardinal Drive Extension
Wilmington, NC 28405
Mr. Baker:
The GE — FGE Office Expansion project site was reviewed by Withers and Ravenel to determine
if the project site contained jurisdictional wetlands and/or waters (see attached aerial). The
determination was based on a review of aerial photographs, the New Hanover County Soils Map
and a site visit by W&R staff on January 16, 2008.
The proposed project area is located within a previously developed portion of the GE complex.
The majority of the project site currently consists of existing buildings and asphalt, with several
small areas of grass and a small drainage Swale. The grassed areas are mowed on a regular basis,
and do not exhibit any of wetland characteristics. The drainage Swale did not exhibit an Ordinary
High Water line, nor contain wetland vegetation.
Therefore, based on the review of the soils map, aerial photographs and the site visit, it was
determined that the project site does not contain any jurisdictional wetlands and/or waters and
consists entirely of uplands.
Troy easley
Withers and Ravenel
7040 Wrightsville Ave, Suite ioi Wilmington, North Carolina 28403 tel: [phone] fax:[phone]
www.w ith a rsraven el.c o m

RE: GE - FGE Office Expansion - express review
Subject: RE: GE - FGE Office Expansion - express review
From: "Hines, Billy D. (GE Infra, Energy)" <[e-mail]>
Date: Tue, 29 Jan 2008 15:46:09 -0500
To: "Janet Russell" <[e-mail]>, "Mark Hargrove"
<MH argrove@withersravenel. com>
Janet, I will be there on 2/6. Look forward to meeting you.
Billy Hines
GE -Hitachi Nuclear Energy
Wilmington Site Facilities Manager
T 910-675-5492
F 910-362-5492
D 8 *292-5492
C 910-547-2760
E [e-mail]
www.ge-energy.com/nuclear
3901 Castle Hayne Rd. (P.O. Box 780), M/C G50
Wilmington, North Carolina, 28402
-----Original Message -----
From: Janet Russell[mailto:[e-mail]]
Sent: Monday, January 28, 2008 5:45 PM
To: Mark Hargrove; Hines, Billy D. (GE Infra, Energy)
Subject: Re: GE - FGE Office Expansion - express review
As a matter of fact.... we have
The Express Stormwater submittal meeting has been scheduled with *Chris
Baker on February 6, 2008 at 8:30 AM *here in the Wilmington Regional
Office. A representative of GE must attend the submittal meeting
Please review the submittal requirements attachment. Please review the
BMP Manual web site for the latest stormwater application forms,
supplements, maintenance agreements, information checklist, etc.
If the Feb. 6th meeting date works for you and client, please let me
know.
Thanks,
Janet Russell
Express Permitting
Mark Hargrove wrote:
Have you come up with a date for the review yet?
Mark Hargrove Withers & Ravenel Inc. 7040 Wrightsville Ave.,Suite
101, Wilmington, NC 28403 tel: [phone] fax: [phone]
http://www.withersravenel.com <http://www.withersravenel.com/>
1 of 1 1/29/2008 5:01 PM

about:blank
As a matter of fact.... we have.
The Express Stormwater submittal meeting has been scheduled with Chris Baker on February 6,
2008 at 8:30 AM here in the Wilmington Regional Office. A representative of GE must attend the
submittal meeting.
Please review the submittal requirements attachment. Please review the BMP Manual web site for the
latest stormwater application forms, supplements, maintenance agreements, information checklist, etc.
If the Feb. 6th meeting date works for you and client, please let me know.
Thanks,
Janet Russell
Express Permitting
Mark Hargrove wrote:
Have you come up with a date for the review yet?
MARK N. HARGR CIv C, P.E.
WITHERS ft>a RAVENEL
7o&o 4irlUlawille krenua„Adle;m 11Vilnllngroq N.C. M C1 ,
tol. ,O 2569a1 7i W: �ra_5bay8q
N9;^.'7,1',1(il e f51"a YC IiC' l.G 6 n5
1 of 1 1/28/2008 5:45 PM

Express Review Request
Subject: Express Review Request
From: "Mark Hargrove" <[e-mail]>
Date: Fri, 25 Jan 2008 15:15:15 -0500
To: "Janet Russell" <[e-mail]>
Janet,
Please see attached the files associated with the request for an Express Review for the GE - FGE Office
Expansion Project. This project will be submitted as a Redevelompent Project.
Please give me a call to discuss a submittal date.
Thanks
MARK N. HARGRCIVE, P.E.
WITHERS 0 RAVENEL
7os�'��dylrtsrille lcnnue, Suile m: r IYihningmn, Pic, ",Cr3
WP qio nf..pr7� :a.:9rc.zi5s;en
A,=w. ;ithersravenel.con
Content -Description: EXPRESS COVERSHEET.doc
EXPRESS COVERSHEET.doc Content -Type: application/msword
Content -Encoding: base64
(Express Permit Questionnaire - GE FGE Expa
Express Permit
Content -Description: Questionnaire - GE
FGE
Expansion.doc
Content -Type: application/msword
Content -Encoding: base64
Content -Description: VICINITY-MAP.pdf
VICINITY-MAP.pdf Content -Type: application/octet-stream
Content -Encoding: base64
1 of 1 1/28/2008 10:25 AM

©/ + Reviewer G S 13
NCDENR Submit a /G
North Carolina Department of Environment and Natural Resources
127 Cardinal Drive Extension, Wilmington, NC 28405 [phone] FAX [phone]
Time
Request for Express Permit Review Confirm
FILL-IN all information below and CHECK required Permit(s). 11,E
FAX to Express Coordinator along with a detailed narrative and vicinity map of the project location. �C
Projects must be submitted by 5:00 pm the day before the review date, unless prior arrangements are made.
APPLICANT Name: Billy Hines Title: Site Facilities Manager
Company Name: General Electric
Address: 3901 Castle Hayne Road City: Wilmington, NC Zip: 28409
Phone : [phone] Fax : [phone] Email : billy. hines(a)gnf.com
PROJECT Name: iGE — FGE Office Expansion County: New Hanover
PROJECT DRAINS TO : Unname Trib to Northeast Cape Fear River (Stream name) the Cape Fear RIVER BASIN
ENGINEERICONSULTANT INFORMATION:
Name: Mark N. Hargrove , PE
Company: Withers & Ravenel
Address: 7040 Wrightsville Ave. City: Wilmington State: NC Zip: 28403
Phone : [phone] Fax : [phone] Email : mhargrovena withersravenel.com
State or National Environmental Policy Act (SEPA or NEPA) — EA or EIS Required? ❑Yes ® No
--------------------------------------------------------------------------------------------------------------------------------------------------
❑STREAM ORIGIN DETERMINATION # of Stream calls Stream Name
® STORMWA TER ❑ Low Density ❑ High Density -Detention Pond ® High Density - Other
(check all that apply) ❑ Low Density -Curb & Gutter e High Density -Infiltration 8 Off -site
Wetlands MUST be addressed below NPDES Phase II Plan Revision
----------------------------------------------------------------------------------------- -----------------------------------------
❑ COASTAL ❑ Excavation & Fill ❑ Bridges & Culverts ❑ Structures Information
MANAGEMENT ❑ Upland Development ❑ Marina Development ❑ Urban Waterfront
❑ LAND QUALITY ❑ Erosion and Sedimentation Control Plan with acres to be disturbed
WETLANDS (401) Wetlands on Property ? ❑ Yes ® No Isolated Wetlands on Property? ❑ Yes ❑ No
(Check all that apply) Wetlands will be impacted? ❑ Yes ® No Wetland impacts: 0 acre(s)
Wetlands delineation has been completed? ® Yes ❑ No ❑ Buffers impacted: Acre(s)
USACOE Approval of Delineation completed? ❑ Yes ® No
404 Application in Process w/USACOE? ❑ Yes ® No / Permit recv'd from USACOE❑Yes ❑ No
401 Application Required? ❑ Yes ® No If Yes, ❑ Regular ❑ Express
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------
Additional fees, not to exceed 50% of the original Express Review permit application fee may be charged for
subsequent reviews due to the insufficiency of the permit application.
Total Fee:$ Stormwater $ E GDae RreceyuedE D
CAMA $ JAN 2 5 2108
LQS $
401 $ DWO

i Arxv
ENGINEERS 1 PLANNERS I SURVEYORS O - Pfogeet lBo and*ry./R'euiew Area
rae010ft A. M IM FYYY�...MC LIn st natn.m m:MupAn1

P
s P
SITE
132
VICINITY MAP
(N. T. S.)
NARRATIVE
THE GENERAL ELECTRIC SITE IS t 1,691 ACRES AND IS LOCATED AT 3901
CASTLE HAYNE ROAD IN WILMINGTON, NC. THE PROPOSED PROJECT IS A
2,500 SF EXPANSION TO AN EXISTING BUILDING. THE DISTURBED AREA FOR
THIS PROJECT WILL BE ONLY +/- 0.3 ACRES DUE TO TWO UNDERGROUND
UTILITIES THAT WILL HAVE TO BE RELOCATED. THIS PROJECT WILL BE
SUBMITTED AS A REDEVELOPMENT PROJECT. THERE WILL ACTUALLY BE A
REDUCTION IN IMPERVIOUS AREA AT THE PROJECT LOCATION AFTER THE
PROJECT HAS BEEN CONSTRUCTED. A SAND FILTER WILL BE UTILIZED TO
TREAT THE RUNOFF FROM THE BUILDING EXPANSION.
GE- FGE Office Expansion
REQUEST FOR EXPRESS PERMIT REVIEW DATE
JANUARY 25, 2008 E C E
D
JAN 2 5 2008
DWO
PROD #

Project Name: GE - FGE Office Expansion
Stormwater Express Questionnaire (1/25/2008)
What is the applicant's full legal name? General Electric
Is the applicant associated with Sole proprietor Corporation ❑ LLC
Partnership Municipality
If it's an LLC, is it ❑ Manager -managed or ❑ Member -managed?
OWhat is the applicant's title within the Corp., LLC or Partnership?
Will an agent (someone other than the applicant) be signing the application? Yes No
If Yes, what is the agent's name and title?
Bill Hines - Site Facilities Mana er
ease no e me application signature requirements are listed in NCAC 2H.1003 (e). In
summary, only the sole proprietor of a sole proprietorship, the designated manager, member -
manager, president or vice president of a corporation or LLC, the general partner of a
partnership, or a ranking official of a municipality may sign permit applications and supplements.
The signature of the engineer or other agent can be accepted only if accompanied by a signed
letter of authorization from one of the aforementioned individuals. Corporations, LLC's and
Partnerships must be registered with the NC Secretary of State's Office, and be active. Please
note that spelling, capitalization, and punctuation are extremely important. Please provide the
entity name exactly as on file with the NC Secretary of State.
2 Where is the project located?
County New Hanover Nearest Town/City Wilmington
(Attach a detailed vicinity map with both local street names and SR, NC, US or Interstate
highway numbers, plus other relevant information such as town or city names, directions to, etc.
Show the nearest intersection of two major roads on the vicinity map. A major road is any 1, 2 or
3 digit NC, US or interstate highway.)
If the project is located in Brunswick, Onslow, or New Hanover Counties, or a small
portion of northern Pender County or the unincorporated areas outside of Morehead City
and Atlantic Beach in Carteret County, NPDES Phase II Post -Construction rules will
apply, unless a vested development right, as described in the Session Law, can be
Q demonstrated, which is dated prior to July 1, 2007.
i
LU 3. What is the name of the receiving stream? Unnamed Trib to NE Cape Fear River
CWhat River Basin is it located in? Cape Fear River
W N o L hat is the classification of the receiving stream? Class SC
Z For SA or SR waters, a separate scaled topographic map will be required. The project must be
V Q #accurately located on the map and the % mile radius from the property corner closest to the SA
-or SR receiving stream must be drawn on the map. If you claim that the project is not within
W ¢mile of SA or SR waters, you must conduct a series of chlorides tests to demonstrate that the
°chlorides level at a point in the receiving stream that is at least % mile from the project is less
than 500 ppm. Samples must be sent to a State certified lab for testing.
4. If the project is high density, what type of stormwater management BMP's are being proposed?
(check all that apply)
Wet Detention Infiltration Trench Infiltration Basin Sand Filter
Bio-retention Wetlands Alternative ® Offsite
Dry Detention NPDES Phase II Other
How many separate BMP's are being proposed? 9 i 2 3 4 5 6 7 8 9 10 11 12 Other
5. Is there offsite runoff from the adjacent properties or public right-of-way that will drain into any of
the proposed BMP's on the project and is not being diverted? LJ Yes ® No ❑ N/A
6. Is a road across other property required to access the project? ❑ Yes ® No ❑ N/A
7. Is there any existing development or pre-1988 existing BUA located on the property?
(Please document, delineate and identify on the plans.) ® Yes u No ❑ N/A
Page 1 of 3

Project Name: GE — FGE Office Expansion
Will the high density project collect all of the proposed BUA? ® Yes ❑ No ❑ N/A
(If not, attach a separate explanation sheet)
Will the project involve the subdivision and sale of property? ❑ Yes ® No ❑ N/A
Is the subdivision ❑ residential or ❑ commercial?
How many lots are proposed? N/A
(Deed restrictions are required for all residential, commercial, low density or high density sub-
divisions. Specific language for the various types of subdivisions is available from DENR.)
10. Will the plans show all delineated wetlands? ❑ Yes ❑ No ® N/A
(All projects require either a signed wetlands delineation map or a wetlands report to be
submitted with the application. Only a trained professional may provide information regarding
the presence or absence of wetlands.)
11. Are wet detention ponds or other engineered controls proposed to be located adjacentwetlands? El Yes
Z No ❑ N/A
(If, yes, a physical means to prevent the dewatering of the wetland must be provided, or the
SHWT must be provided to demonstrate that the permanent pool of the BMP is above the
SHWT and will not dewater the wetlands over time. Where possible, all BMP's and swales
should outlet into back the wetland (with level spreaders).
12. For infiltration projects, a site visit must be completed with the DENR soils scientist to verify the
soil type, water table and infiltration rate provided in the soils report.
What is/was the scheduled site visit date: N/A
(Include a copy of the consultant's soil report with the application.)
13. Level Spreaders are required at the outlet of all engineered controls and swales prior to entering
surface waters or wetlands. Will the plans reflect level spreaders? ® Yes ❑ No ❑ N/A
(The purpose of the level spreader is to reduce the energy of the incoming runoff and to
promote diffuse sheet flow to prevent erosion and scour into the receiving waters or wetlands.)
14. Is this project A modification to an existing permit
A lot that will be treated in an existing, previously permitted BMP?
What is the name of the existing permitted facility:
GE - Huntersville SW8 060318
GE - Wilmington Field Service Center SW8 980604 Mod
GE - FCO Cafeteria SW8 070509
GE — HQ Site & Modular Office Complex — SW8 070807
GE — Tooling Repair Center Project — SW8 071203 (High Density Project)
GE — Tooling Repair Center Project (Road Project) — SW8 071202 (Low Density Project)
What is the permit number of the existing permitted facility? see above
Is the permitted facility in compliance with its permit? Yes No N/A
Have the deed restrictions been recorded? Yes No N/A
Have the deed restrictions been submitted? Yes No N/A
Has the Designer's Certification been submitted? Yes No N/A
15. Do the plans reflect all information in 15A NCAC 2H.1003 (g)? ® Yes ❑ No ❑ N/A
16. Will all of the design requirements for each proposed BMP be met? ® Yes ❑ No ❑ N/A
(If not, attach a separate explanation sheet. Please note that the Express program is not set up
to handle any type of deviation from the standard design.)
17. For each BMP in all high density projects, and low density curb outlet swale projects, the
individual drainage area for each proposed BMP must be clearly delineated.
RE
C E I Y E DI
JAN 2 5 2008
Page 2 of 3
DWQ
PROJ #

Project Name: GE — FGE Office Expansion
18. Any revisions made to the application as a result of this review may cause changes to the other
documentation. Plans, calculations, application, and supplements should be reviewed for any
necessary changes. For example, changing the orifice size will require a modification to the
calculations, the pond details on the plans, and page 1 of the supplement.
Page 3 of 3

IMP ECS CAROLINAS, LLP
CAROLINAS Geotechnical • Construction Materials • Environmental • Facilities
January 17, 2008
Mr. Neal Andrew, P.E.
Andrew Consulting Engineers, P.C.
3811 Peachtree Avenue Suite 300
Wilmington, North Carolina 28403
Re: • Additional Infiltration Evaluation
GE-FGE Expansion
Wilmington, North Carolina
ECS Project No. 22.13672
Dear Mr. Andrew,
ECS Carolinas, LLP (ECS) recently conducted an infiltration evaluation for the proposed
infiltration area at the FGE Building at the GE facility in Wilmington, North Carolina. This
letter, with attachments, is the report of our evaluation.
Field Testing
On January 16, 2008 ECS conducted an exploration of the subsurface soil and ground water
conditions at an additional requested location shown on the attached Site Diagram. The borings
were located by using a scaled site map provided by Andrew Consulting Engineers. The
purpose of this exploration was to obtain subsurface information of the suitability of the in -
place soils for the proposed infiltration area. We explored the subsurface soil and ground water
conditions by advancing one hand auger boring into the existing ground surface at the requested
boring location. We visually classified the subsurface soils and obtained representative samples
of each soil type encountered. We also recorded the ground water level observed at the time of
each hand auger boring. The attached Infiltration Evaluation Form provides a summary of the
subsurface conditions encountered at each hand auger boring location.
The ground water level and the seasonal high ground water level (SHWL) were estimated at
each boring location below the existing.grade elevation. Below is a summary of each boring
location.
Location
Water Level
SHWL
1
48 inches
30 inches
We have conducted an infiltration test near the hand auger boring to estimate the infiltration rate
for the subsurface soils. Infiltration tests are typically conducted at two feet above the SB WL.
7211 Ogden Business Park • Suite 201 • Wilmington, NC 29411 • [phone] • Fax [phone] * www.ecslimited.com
Asheville. NC • Charlotte. NC • Greensboro. NC • Greenville, SC • Raleigh. NC - Swansboro. NC * Wilmington. NC
* testing services only

Infiltration Evaluation
FGE Building
Wilmington, North Carolina
ECS Project No. 22.13672
Field Test Results
Below is a summary of the infiltration test results:
Location
Description
Depth
Inches/hour
Inches/minute
1
Grey silty
SAND
12 inches
0.14
0.002
Infiltration rates and SHWL may vary within the proposed site due to changes in elevation and
subsurface conditions.
If you have any questions regarding this report, please contact us at [phone].
Respectfully,
ECS CAROLINAS, LLP
K. Brooks Wall
Staff Geologist
Attachments: Site Diagram
hiffitration Evaluation
Walid M. Sobh, . E.
Principal Engineer
NC License No. 22983

Infiltration Evaluation
GE-FGE Building
Wilmington, North Carolina
ECS Project No. 22.13672
January 16, 2008
Location Depth Soil Description
1 0-36" Grey silty SAND
36"-60" Tan/orange clayey SAND
Seasonal High Water Table was estimated to be at 30 inches below the existing
grade elevation.
Infiltration Rate: 0.002 inches per minute (0.14 inches per hour)
Test was conducted at 12 inches below existing grade elevation
Ground water was encountered at 48 inches below the existing grade elevation.

rni
t?�
(D ECS CAROLINAS, LLP
CAROLINAS Geotechnical • Construction Materials • Environmental • Facilities
December 21, 2007
Mr. Neal Andrew, P.E.
Andrew Consulting Engineers, P.C.
3811 Peachtree Avenue Suite 300
Wilmington, North Carolina 28403
Re: Infiltration Evaluation
GE-FGE Expansion
Wilmington, North Carolina
ECS Project No. 22.13672
Dear Mr. Andrew,
ECS Carolinas, LLP (ECS) recently conducted an infiltration evaluation for the proposed
infiltration area at the FGE Building at the GE facility in Wilmington, North Carolina. This
letter, with attachments, is the report of our evaluation.
Field Testing
On December 20, 2007 ECS conducted an exploration of the subsurface soil and ground water
conditions at two requested locations shown on the attached Site Diagram. The borings were
located by using a scaled site map provided by Andrew Consulting Engineers. The purpose of
this exploration was to obtain subsurface information of the suitability of the in -place soils for
the proposed infiltration area. We explored the subsurface soil and ground water conditions by
advancing one hand auger boring into the existing ground surface at the two requested boring
locations. We visually classified the subsurface soils and obtained representative samples of
each soil type encountered. We also recorded the ground water level observed at the time of
each hand auger boring. The attached Infiltration Evaluation Form provides a summary of the
subsurface conditions encountered at each hand auger boring location.
The ground water level and the seasonal high ground water level (SHWL) were estimated at
each boring location below the existing grade elevation. Below is a summary of each boring
location.
Location
Water Level
SHWL
1
48 inches
26inches
2
48 inches
26 inches
We have conducted two infiltration tests near the hand auger borings to estimate the infiltration
rate for the subsurface soils. The infiltration tests are typically conducted at two feet above the
SHWL.
7211 Ogden Business Park • Suite 201 • Wilmington, NC 28411 • [phone] • Fax [phone] • www.ecslimited.com
Asheville, NC - Charlotte, NC - Greensboro, NC - Greenville, SC - Raleigh, NC - Swansboro, NC * Wilmington, NC
• testing services only

Infiltration Evaluation
FGE Building
Wilmington, North Carolina
ECS Project No. 22.13672
Field Test Results
Below is a summary of the infiltration test results:
Location
Description
Depth
Inches/hour
Inches/minute
1
Grey silty
10 inches
.0.48
.008
SAND
2
Grey silty
10 inches
0.25
.004
SAND
Infiltration rates and SI-IWL may vary within the proposed site due to changes in elevation and
subsurface conditions.
If you have any questions regarding this report, please contact us at [phone].
Respectfully,
ECS CAROLINAS, LLP
K. Brooks Wall
Staff Geologist
Attachments: Site Diagram
Infiltration Evaluation
lhl,6d Vx. sty.
Walid M. Sobh, P. E.
Principal Engineer
NC License No. 22983

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Infiltration Evaluation
GE-FGE Building
Wilmington, North Carolina
ECS Project No. 22.13672
December 20, 2007
Location Depth Soil Description
1 0-24" Grey silty SAND
24"-60" Tan/orange clayey SAND
Seasonal High Water Table was estimated to be at 26 inches below the existing
grade elevation.
Infiltration Rate: 0.008 inches per minute (0.48 inches per hour)
Test was conducted at 10 inches below existing grade elevation
Ground water was encountered at 48 inches below the existing grade elevation.
Location Depth Soil Description
2 0-24" Grey silty SAND
24"-60" Tan/orange clayey SAND
Seasonal High Water Table was estimated to be at 26 inches below the existing
grade elevation.
Infiltration Rate: 0.004 inches per minute (0.25 inches per hour)
Test was conducted at 10 inches below existing grade elevation
Ground water was encountered at 48 inches below the existing grade elevation.