SW8050322_HISTORICAL FILE_20051017

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
El CURRENT PERMIT
❑ APPROVED PLANS
I� HISTORICAL FILE
L
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

State Stormwater Management Systems
Permit No. SW8 050322
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
Jeffrey LaCroix
Pine Grove Offices
New Hanover County
construction, operation and maintenance of an infiltration basin 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 October 17, 2015, and
shall be subject to the following specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater
described in the application and other supporting data.
2. This stormwater system has been approved for the management of stormwater
runoff as described in Section 1.6 on page 3 of this permit. The stormwater
control has been designed to handle the runoff from 25,110 square feet of
impervious area. This basin must be operated with a 50' 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 050322
R
The following design criteria have been provided in the infiltration basin and must
be maintained at design condition:
a. Drainage 2Area, acres:
Onsite, ft :
Offsite, ft2:
b. Total Impervious Surfaces, ft2
C. Design Storm, inches:
d. Basin Depth, feet:
e. Bottom Elevation, FMSL:
f. Bottom Surface Area, ft2:
g. Bypass Weir Elevation, FMSL:
h. Permitted Storage Voiume, ft3:
i. Type of Soil:
j. Expected Infiltration Rate, inlhr:
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
1.36
59,461
None
25,110
3
2
14.4
629
16.64
8,123
Bh
9
10
2.67
Hewletts Creek 1 Cape Fear
18-87-26
"SA; HQW"
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 050322
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 050322
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 issued this the 17t' day of October, 2004.
NCATROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
O "
6e-�
or Ian W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 5of7

P. 1
FILE MODE
--------------
038 MEMORY TX
COMMUNICATION RESULT REPORT ( MAY. 9.2005 3:10PM )
TTI NCDENR WIRO
OPTION ADDRESS (GROUP) '?�LT PAGE
REASON FOR ERROR
E--1) HANG UP OR LINE FAIL
E-3) NO ANSWER
W A7`'
97635631
P. 1/1
E-2) BUSY
E-4) NO FACSIMILE CONNECTION
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
CO r North Carolina Department of Environment and Natural Resources
p Alan W. Klimek, P.E. Director
Division of Water Quality
FAX COVER SHEET
Date: May 9, 2005
To: Charles Cazler
Company: Tripp Engineering, P.C.
FAX: [phone]
No. of Pages: 1
From: Rhonda Hall
Water Quality Section Stormwater
Fax #: [phone]
Phone #: [phone]
DW4 Stormwater Project Number: SW8 050322
Project Name: Pine Grove Offices
MESSAGE:
Charlie:
The Wilmington Regional office received a Stormwater Management Permit Application for

�QF W A7- Rq Michael F. Easley, Governor
O G William G. Ross, Jr., Secretary
7 North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
FAX COVER SHEET
Date: May 9, 2005
To: Charles Cazier
Company: Tripp Engineering, P.C.
FAX: [phone]
No. of Pages: 1
From: Rhonda Hall
Water Quality Section Stormwater
Fax M 910-350-2004
Phone #: [phone]
DWQ Stormwater Project Number: SW8 050322
Project Name: Pine Grove Offices
MESSAGE:
Charlie:
The Wilmington Regional Office received a Stormwater Management Permit Application for
Pine Grove Offices on March 23, 2005. A preliminary review of that information has
determined that the application is not complete. The following information is needed to
continued the stormwater review:
1. Please highlight a plan sheet with the pond drainage areas.
2. Please provide a sealed set of calculations for this project.
3. Please provide a dimensioned building footprint, including the driveway, walks, covered
areas, patios, decks, etc.
4. Please verify that the total impervious surface area associated with this project is
25,185. The plans show the impervious surface area as being 24,769 versus the
application showing the impervious surface area as being 25,185.
ENBlrbh: S:IWQSISTORMWATIADDINF0120051050322.may05
North Carolina Division of Water Quality 127 Cardinal Drive Extension Phone [phone] Customer Servicel-877-623-6748
Wilmington Regional Office Wilmington, NC 28405-3845 FAX [phone] Internet: h2o.enr.state.nc.us
An Equal OpportunitylAffrmative Action Employer — 50% Recycled110% Post Consumer Paper
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orthCarolina
,Xatrrrallll

TRLPP ENGINEERING9 P.C.
41 419 Chestnut Street
Wilmington, North Carolina 28401
Phone: [phone] • FAX: [phone]
June 22, 2005
NCDENR
Division Water Quality
`127 Cardinal Drive
Wilmington, NC 28405-3845
Attn: Ms. Rhonda Hall
Re: Pine Grove Offices
Project No. SW8 0503022
TE 04003
Dear Rhonda -
In response to your comments dated May 9, 2005, we offer the following:
1. A highlighted plan is enclosed.
2. Sealed calculations are provided.
3. Building has been dimensioned.
4. The total impervious surface are is 25,110 sf. The plan and the
application have been revised to reflect this number.
Please review for approval and contact us with any questions, comments or if you
need additional information. Thank you.
Sincerely,
Tripp Engineering, P.C.
Charles D. Cazier, E.I.
CDC:dcb
Enc.
JC1�l�T�D
JUN 2 3 Z005
SY:

0400 �
July 14, 2004
LaCroix Veterinary Clinic
908 Pine Grove Drive
Wilmington, North Carolina 28403
Attention: Dr. Jeffrey LaCroix
Reference: Double Ring Infiltrometer Testing
LaCroix Veterinary Clinic
908 Pine Grove Drive
Wilmington, North Carolina
Job No. 1063-04-346
Dear Dr. LaCroix:
As requested, S&ME personnel have recently conducted double -ring infiltrometer testing of the
surficial soils at the subject site at the approximate location shown in Figure 1. Specifically, our
representatives performed the following work items on July 9, 2004:
1. Advanced one hand-augered boring near the infiltrometer test location in order
to visually classify the in -place soils. A Munsell Soil Color Chart was used to
define the hue and chroma of the recovered soil samples.
2. Conducted double -ring infiltrometer testing at a depth of 3 inches below the
existing ground surface. This testing was conducted in general accordance with
American Society for Testing and Materials (ASTM) procedure D-3385
entitled, "Infiltration Rate of Soils in Field Using Double -Ring Infiltrometer".
Based on our field classifications of the excavated soils at the hand-augered boring location, the in -
place soils consist of slightly silty fine to medium sands which extended to the completed boring
depth of 84 inches below the existing ground surface. Water was encountered in the borehole at a
depth of 84 inches below the existing ground surface. The site water level will fluctuate with
climatic and seasonal conditions, however, and may be higher or lower at other times of the year. It
is our opinion that the depth to the seasonal high water table exceeds six feet below the existing
ground surface.
S&ME, Inc. 19101 799.9945
6409 Amsterdam Way, Bvilding B-3 7 19101 799-9958 fax
Wilmington, North Carolina 28405 1 r :.: i!' _ +q. 1 -1+t

LaCroix Veterinary Clinic
S&ME Job Number 1063-04-346
July 14, 2004
Page Two
The average infiltration rate at the test location was approximately 9.3 inches per hour. A summary
of the field test results is presented in Table 1.
S&ME appreciates the opportunity to provide our services during this phase of the project. Should
you have any questions after reviewing this letter, or if we can be of additional assistance, please do
not hesitate to contact us at your convenience.
Sincerely,
S&ME, INC.
C. Richard Connell, 11
Senior Engineering Technician
Michael W. Behen, P.E.
Senior Geotechnical Engineer
CRC:M BJjns
Attachments
Copy: Tripp Engineering, PC, Mr. iVlike Hoffer

TABLE 1
Double Ring Infiltrometer Testing
LaCroix Veterinary Clinic
908 Pine Grove Drive
Wilmington, North Carolina
Job No. l 063-04-346
Date of Test
Depth of Test Below Site Grade
Depth of Water in Rings
Inner Diameter of Inner Ring
Inner Diameter of Outer Ring
Depth to Groundwater
Average Infiltration Rate
Depth
Inches)
Hue
Value/Chroma
0-8
2.5 Y
4/3
8-30
10 YR
5/6
30-45
10 YR
4/6
45-84
2.5 Y
6/6
July 9, 2004
3 inches
3 inches
11'/4 inches
22'/2inches
84 inches
9.3 inches per hour
SOIL PROFILE
Soil Description
Olive Brown Fine to Medium SAND - Trace of Silt
Yellowish Brown Fine to Medium SAND - Trace of Silt
Dark Yellowish Brown Fine to Medium SAND - Trace of Silt
Olive Yellow Fine to Medium SAND -Trace of Silt

LEGEND
Approximate Location
of Double Ring
Infiltrometer Test
PINE GROVE DRIVE (NCSR 1492)
60' RIW
ITT
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it
it
`aa0Tw
Ilt am
`1'�
l I 1
_ rRACIr 19
ax srarr sitar Ammmc f
L
_ MULETTs CnTX h[W RA{AS ASL=Ar1W
{ * '� Y�Yf Xf9 XXW 22M PAW WJ
SCALE: NOT TO SCALE
CHECKED BY: MWB
DRAWN BY: JNS
DATE: 7-13-04
Note: Site plan drawing provided to S&ME by Tripp Engineering personnel.
It
ENGINEERING • TESTING
ENVIRONMENTAL SERVICES
DOUBLE RING INFILTROMETER TESTING
FIGURE
LaCROIX VETERINARY CLINIC
NUMBER
908 PINE GROVE DRIVE
WILMINGTON, NORTH CAROLINA
JOB NUMBER: 1063-04-346

TRIPP ENGINEERING, P.C.
419 Chestnut Street
Wilmington, North Carolina 28401
Phone: [phone] • FAX: [phone]
March 22, 2005
NCDENR
Division Water Quality
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn: Ms. Linda Lewis
Re: Pine Grove Offices
New Hanover County, NC
TE 04003
Dear Linda:
Enclosed please find two (2) sets of plans, one (1) signed original and one (1)
copy of the application form with narrative, one (1) infiltration basin supplement, soils
report and one check for the application fee.
Please review for approval and contact us with any questions or comments.
Thank you.
Sincerely,
Tripp Engineering, P.C.
Charles D. Cazier, E.I.
CDC:dcb
Enc.
MAR 2 3 Z005
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