SW8080426_HISTORICAL FILE_20080523 (2)

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 O%O`-1I�p
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
© HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
20c)%0523
YYYYMMDD

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen IL Sullins Director
Division of Water Quality
May 23, 2008
Kimberly J. Martin, Manager
A & K of Wilmington, LLC
6132-8 Carolina Beach Road
Wilmington, NC 28412
Subject: Stormwater Permit No. SW8 080426
Masonboro Family Medicine
High Density Project
New Hanover County
Dear Mrs. Martin:
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for Masonboro Family Medicine on May 21, 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 080426
dated May 23, 2008, for the construction of the subject project.
This permit shall be effective from the date of issuance until May 23, 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 150E 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 Chris Baker, or me at [phone].
Si
Edward Beck
Regional Supervisor
Surface Water Protection Section
ENB/csb: S:\WQS\STORMWAT\PERMIT\080426.may08
cc: Charlie Cazier, P.E., Tripp Engineering
New Hanover County Building Inspections
City of Wilmington Stormwater Services
New Hanover County Engineering
Chris Baker
tWilmington Regional Office NOne
o IhCarolina
Central Files A4turally
North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone [phone] Customer Service
Wilmington Regional 011ice Internet: www.newatemualitv.ore Fax [phone]
An Equal Opportunity/Affirmative Action Employer — 50% Recycled110% Post Consumer Paper

State Stormwater Management Systems
Permit No. SW8 080426
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
Kimberly J. Martin and A & K of Wilmington, LLC
Masonboro Family Medicine
6419 Carolina Beach Road, New Hanover County
FOR THE
construction, operation and maintenance of an underground infiltration trench 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 May 23, 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.
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 52,971 square feet of
impervious area.
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.
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 080426
91
The following design criteria have been provided in the infiltration trench and
must be maintained at design condition:
a. Drainage 2Area, acres:
Onsite, ft
Offsite, ftz:
b. Total Impervious Surfaces, ft2
C. Design Storm, inches:
d. Trench Dimensions, L x W x H, ft:
e. Perforated Pipe Diameter/Length
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
71,003
71,003
None
52,971
3.7
Irregular Configuration (see plans)
12" dia. — 522'
8" dia. — 1,000
32.5
34.5
15,538
Fine to Medium Sand
6
30.5
4.1
ICWW / Cape Fear
18-87-25.5
"SA;ORW"
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, filter 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 080426
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.
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 080426
III. GENERAL CONDITIONS
1. 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 t ' the 23rd day of May, 2008.
NTAL MANAGEMENT COMMISSION
ror uoieen H. bumns, uirector
Division of Water Quality
By Authority of the Environmental Management Commission
Page 5 of 7

State Stormwater Management Systems
Permit No. SW8 080426
Masonboro Family Medicine
Stormwater Permit No. SW8 080426
New Hanover Countv
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 080426
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 elevations are per the approved plan.
6. The bypass structure is located per the approved plans.
7. A Trash Rack is provided on the outlet/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
:g
W 0:0
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):
A & K of Wilmington, LLC
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
Kimberly I. Martin/ member mangier
3. Mailing Address for person listed in item 2 above:
6132-8 Carolina Beach Road
City:Wilmington State:NC Zip:28412
Phone: (910 ) 790-3660 Fax: (910 ) 790-9499
4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
Masonboro Family Medicine
5. Location of Project (street address):
6419 Carolina Beach Road
City:Wilmington County:New Hanover Zip:28412
6. Directions to project (from nearest major intersection):
From the intersection of US 421 and NC 1492, trave approx.1.1 miles north on US 421. Site is on right.
7. Latitude:34° 06' 17" N Longitude:77° 53' 57" W of project
8. Contact person who can answer questions about the project:
Name:Phillip G. Tripp Telephone Number: (910 ) 763-5100
Email:[e-mail]
if. PERMIT INFORMATION:
1. Specify whether project is (check one)
rI .
❑Renewal ❑Modification
Form SWU-101 Version 02.19.08
Page] of 4

2. 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; information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
❑CAMAMajor ®Sedimentation/Erosion Control 0404/401Permit ❑NPDESStormwater
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.
Underground infiltration to treat the first 1.5" and 1 year 24 hour pre -post runoff requirement.
2. Stormwater runoff from this project drains to the Cave Fear River basin.
3. Total Property Area: 1.63 acres 4. Total Wetlands Area: 0 acres
5. 100' Wide Strip of Wetland Area: NA acres (not applicable if no wetlands exist on site)
6. Total Project Area**:1.63 acres 7. Project Built Upon Area:74.6% %
8. I-Iow 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.
For high density projects, complete the table with one drainage area for each engineered stormwater device.
Basin Information
Drainage Area 1
Drainage Area 2
Receiving Stream Name
ICWW
Stream Class & Index No.
SA ORW;18-87-25.5
Total Drainage Area (sf)
71,003 sf
On -site Drainage Area (so
71,003 sf
Off -site Drainage Area (sf)
-
Existing Impervious* Area (so
-
Proposed Impervious*Area (so
52,971 sf
% Impervious* Area (total)
74.6 %
Impervious* Surface Area
Drainage Area 1
Drainage Area 2
On -site Buildings (so
14,335 sf
On -site Streets (so
-
On -site Parking (so
33,603 sf (includes 1*146 sf pervious)
On -site Sidewalks (so
5,033 sf
Other on -site (so
-
Off -site (so
Total (so:
52,971 sf
* Impervious 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. This is the area used to calculate percent project built upon area (BUA).
Form SWU-101 Version02.19.08
Page 2 of 4

10. How was the off -site impervious area listed above derived?NA
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. Forms can be
downloaded from littp:/1112o.eiir.state.nc.us/sii/bmp forms htm - deed restrictions.
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
13MP specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the status
and availability of these forms. Forms can be downloaded from ham•//h2o enr state nc us/su/bmp forms.htm.
Form SW401-Low Density
Form SW401-Curb Outlet System
Form SW401-Off-Site System
Form SW401-Wet Detention Basin
Form SW401-Infiltration Basin
Form SW401-Infiltration Trench
Form SW401-Bioretention Cell
Form SW401-Level Spreader
Form SW401-Wetland
Form SW401-Grassed Swale
Form SW401-Sand Filter
Form SW401-Permeable Pavement
Low Density Supplement
Curb Outlet System Supplement
Off -Site System Supplement
Wet Detention Basin Supplement
Infiltration Basin Supplement
Underground Infiltration Trench Supplement
Bioretention Cell Supplement
Level Spreader/Filter Strip/Restored Riparian Buffer Supplement
Constructed Wetland Supplement
Grassed Swale Supplement
Sand Filter Supplement
Permeable Pavement Supplement
Form SWU-101 Version 02.19.08 Page 3 of

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 litti)://h2o.enr.state.ne.us/su/msi maps hun)
Please indicate that you have provided the following required information by initialing in the space provided
next to each item.
Initials
• Original and one copy of the Stonnwater Management Permit Application Form CIYI
• Original and one copy of the Deed Restrictions & Protective Covenants Form (if
required as per Part 1V above)
• Original of the applicable Supplement Form(s) and O&M agreement(s) for each BMP 60G
• Permit application processing fee of $505 ($4,000 for Express) payable to NCDENR C-CX
• Calculations & detailed narrative description of stormwater treatment/management CEIG
• Copy of any applicable soils report CJOIL
• Two copies of plans and specifications (sealed, signed & dated), including:
- 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, fhiished 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. (ex. designing engineer or firm)
Designated agent (individual or firm): Tripp Engineering
Mailing Address:419 Chestnut Street
City:Wihnington State:NC Zip:28401
Phone: (910 ) 763-5100
Enmail:tri penQ©ec.rr.conm
Vlll. APPLICANT'S CERTIFICATION
Fax: (910 ) 763-5631
1, (print or type name of person listed in General Information, item 2) K MbMq X Mal-4in
certify that the information included on this permit application form is, to the bebt of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenymts will recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H .1000, /
Da te: 4- /0 -V
FormSWU-101 Version02.19.08 Page 4of4

P. 01
TRANSACTION REPORT
MAY-27-2008 TUE 11:33 AM t
FOR: NCDENR 9103502004
K SEND
DATE START RECEIVER TX TIME PAGES TYPE NOTE M# DP
t �
MAY-27 11:32 AM 97635631 11151, 8 FAX TX OK 487
x TOTAL 1M 15S PAGES: 8
State of North Carolina
Department of Environment and Natural Resources
Wilmington Regional Office
Michael F. Easley, Governor William G. Rosc, Jr., Secretary
FAX COVER SHEET
Date: �- al'-,_c7-'
To -
Co: �(L6aPC 1 N ZtiLT
r r
Fax: 21 t Q" Z G 3" Q3. 1
I t"
No. Pages (excl. cover): —7
Express Permitting
From: Sandra Exum
Phone [phone]
Fax: [phone]
127 Cardinal Drive Extension, Wilmington, NC 28405 • [phone] . An Equal Opportunity Affirmative Action Employcr

Tmpp ENGINEERING, P.C.
0 419 Chestnut Street
Wilmington, North Carolina 28401
Phone: [phone] • FAX: [phone]
RECEIVED
MAY 2 1. 2008
May 21, 2008
NCDENR
Division of Water Quality
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn: Mr. Chris Baker
Re: Masonboro Family Medicine
Project No. SW8 080426
TE 07083
Dear Chris:
In response to your comments dated May 13, 2008, we offer the following:
1. Simple method calculations are enclosed.
2. The 3.7 inch storm has been utilized in the supplement and calculations.
3. $1,000 fee is enclosed.
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 1). Cazier, P. .
CDC:dcb
Enc.

5121r2"
CDC
WATERSHED DATA
Total Drainage Area
s . ft.
acres
71.003
1.63
Masonboro Family Medicare
Infiltration Trench
Simple Method
Im erAous Area
Land Use
s . ft.
acres
Buildi
14,335J.1
0.33
Concrete -
5,033
0.12
As halt
33,603
0.77
Total
52,971
1.22
INFILTRATION SYSTEM:
% impervious = 0.746
= 74.6%
say 74.6%
CPRE = 0.25
CPOST = (% imp.)(.95)+(1-% imp.)(.25)
0.78
12 = 5.06 in/hr
110 = 6.30 in/hr
125 = 7.13 in/hr
Volume of runoff- (Design raintalp(Rv)(Drainage Ama)(3630)
V re= 1,095 cu-ft V - 15,794
�tal Volume provided: Based on 40% void space in stone and 100% void space for pipe
Area (so Length(R) Volume(cfo Area (sr) E/eva6'on(R)
8' pipe 1.4 1000 1400 Bottom: 17,143 32.5
12"pipe 3.14 522 1639 Flood., 17,143 34.5
Vt = ((Volume of trench - Volume of Pipe) x 0.40)4 Volume of Pipe
Vt = 15,538 cu-ft I Vt> Vmin OK
DRAWDOWN RATE:
RATE OF INFILTRATION 6 IN/HR
DEPTH OF BASIN: 24 IN
DRAW DOWN RATE: ®HRS
CIARO
llffii//
;a SEAL r;
032555
r S D.0G
lull \\\
'55 12,12L
r r:

M1/2008 Masonboro Family Medicine 07083
CLC Infiftration Routing r
1-year 24-hour Storm
WATERSHED DATA
BEFORE DEVELOPMENT
WATERSHED AREA
1.63 ACRES
HYDRAULIC LENGTH
360 FT
CHANGE IN HEIGHT
1 FT
RUNOFF COEF.'C'
0.25
TIME OF CONCENTR
5.00 MIN
INTENSITY 1 YR
5.67 IN/HR
Qa = 2.31 CFS
Qa = PRE -DEVELOPED PEAK DISCHARGE
COMPUTE DEPTH OF RUNOFF
P = 3.7 INCHES iyr, 24hr PRECIPITATION
CN = 88.5
S = (1000/CN)-10
S = 1.30
Depth (0) = (P-0.2S)A2/(P*0.8S)
D = 2.50 IN -I yr, 24hr RUNOFF DEPTH
SET VOLUME AND COMPUTE TIME TO PEAK
TIP = I(43.5)(D)(Area)] / Qp
Tip = 24.56 MINUTES
Storage Volume Req'd = (Qp-Qa)'Tp'1.39'60
= 10,033 cu. ft.
CALCULATE Ks AND b
SET NORMAL ELEVATION AT = 32.50 feet
WATERSHED AREA
1.63 ACRES
HYDRAULIC LENGTH
218 FT
CHANGE IN HEIGHT
1.5 FT
RUNOFF COEF.'C'
0.78
TIME OF CONCENTR
5.00 MIN
INTENSITY 1 YR
5.67 IN/HR
QP = 7.21 CFS
Qp = POST -DEVELOPED PEAK DISCHARGE
S
Z
CONTOUR
INCR
ACCUM
CONTOUR
AREA
VOL*
VOL
STAGE
In S
In Z
Z est
(sq ft)
(cu ft)
(cu ft)
(ft)
(ft)
32.5
17,143
0
0
0
0
0
0
33.5
17,143
6,857
6,857
1.0
8.8331
0
1.00
34.5
17,143
6,857
13,714
2.0
9.5262
0.6931
2.00
35.5
3,429
17,143
3.0
9.7493
1.0986
2.50
36.5
-
17,143
4.0
9.7493
1.3863
2.50
37.5
-
17,143
5.0
9.7493
1.6094
2.50
Regression Output:
Ks = 6867
b = 1.00
Constant 8.83

5/21/2008 Masonboro Family Medicine
CLC Infiltration Routing e
1-year 24-hour Storrs
CHAINSAW METHOD FOR
RISER BARREL ROUTING
STORM DATA
r r:
Oa =
2.31 cfs
Op=
7.21 cfs
Tp =
24.6 min
dT =
1 min
BASIN DATA
Ks =
6857
Infiltration
Rate =
0 in/hr
b =
1.00
Flow Rate through bottom =
0.00 cfs
Zo =
32.5 It
Normal water elev =
32.5 It
Peak Outflow =
0.37 cfs
Box Weir
Length =
0 It
Peak Stage =
34.56 ft
Cw =
3.0
Maximum Storage =
14,138 cu It
Zcr =
34.50 It
Control Holes:
State Orifice:
Dia =
0.00 in
Od =
24 in
Inv =
32.5 It
Cd =
0.59
Weir:
L =
36 in
Zi =
32.5 ft
Inv =
34.50 It
Time
Inflow
Storage
Stage
Outflow
W Riser
Barrel Orifice
City Weir
IFStore
Infiltrate
(min)
(cfs)
(c0 ft)
(ft)
(cfs)
(cfs)
(cfs)
(ds)___(cfs)
(cu ft)-_
ICU ft)
0
0.0
0
32.50
0
0
0
0
0.00
0.0
0
1
0.0
0
32.50
0
0.00
0
0
0.00
0.0
0
2
0.1
2
32.50
0.00
0.00
0.0
0.00
0.00
1.8
0
's
03
.4
:iYIK)
0,(x)
0.00
0.0
0.00
0.00
8.8
0
4
O.b
25
32.5U
O.W
0.00
0.0
0.00
0.00
24.5
0
5
0.7
52
32.51
0.00
0.00
0.0
0.00
0.00
52.2
0
6
1.0
95
32.51
0.00
0.00
0.0
0.00
0.00
95.0
0
r
1,4
156
32.52
0.00
0.00
0.0
0.00
0.00
155.6
0
6
1.1
Z37
32.53
0.00
0.00
0.0
0.00
0.00
236.7
0
9
2.1
340
32.55
0.00
0.00
0.1
0.00
0.00
340.4
0
10
2.6
469
32.57
0.00
0.00
0.1
0.00
0.00
468.5
0
11
3.0
623
32.59
0.00
0.00
0A
0.00
0.00
622.6
0
12
3.5
804
32.62
0.00
0.00
0.2
0.00
0.00
803.6
0
13
3.9
1012
32.65
0.00
0.00
0.3
0.00
0.00
1012.2
0
14
4.4
1248
32.68
0.00
0.00
0.4
0.00
0.00
1248.3
0
15
4.8
1512
32.72
0.00
0.00
0.5
0.00
0.00
1511.8
0
16
5.3
1802
32.76
0.00
0.00
0.7
0.00
0.00
1801.8
0
17
5.7
2117
32.81
0.00
0.00
0.9
0.00
0.00
2117.2
0
18
6.0
2456
32.86
0.00
0.00
1.1
0.00
0.00
2456.2
0
19
6.3
2817
32.91
0.00
0.00
1.4
0.00
0.00
2817.0
0
20
6.6
3197
32.97
0.00
0.00
1.7
0.00
0.00
3197.1
0
21
6.8
3594
33.02
0.00
0.00
2.0
0.00
0.00
3593.9
0
22
7.0
4004
33.08
0.00
0.00
2.4
0.00
0.00
4004.4
0
23
7.1
4425
33.15
0.00
0.00
2.7
0.00
0.00
4425.4
0
24
7.2
4854
33.21
0.00
0.00
3.1
0.00
0.00
4853.6
0
25
7.2
5286
33.27
0.00
0.00
3.6
0.00
0.00
5285.6
0
26
7.1
5718
33.33
0.00
0.00
4.0
0.00
0.00
5717.8
0
27
7.0
6147
33.40
0.00
0.00
4.5
0.00
0.00
6146.7
0
28
6.9
6569
33.46
0.00
0.00
4.9
0.00
0.00
6568.7
0
29
6.6
6981
33.52
0.00
0.00
5.4
0.00
0.00
6980.7
0
30
6.4
7379
33.58
0.00
0.00
5.9
0.00
0.00
7379.2
0
31
6.1
7761
33.63
0.00
0.00
6.3
0.00
0.00
7761.5
0
32
5.8
8125
33.68
0.00
0.00
6.8
0.00
0.00
8125.3
0
33
5.5
8470
33.74
0.00
0.00
7.2
0.00
0.00
8470.3
0
34
5.2
8798
33.78
0.00
0.00
7.7
0.00
0.00
8797.6
0
35
4.9
9108
33.83
0.00
0.00
8.1
0.00
0.00
9108.0
0
36
4.7
9402
33.87
0.00
0.00
8.5
0.00
0.00
9402.4
0

521 /2008
Masonboro Family Medicine
07083
CLC
Infiltration Routing
_
1-year 2441our Storm
37
4.4
9682
33.91
0.00
0.00
8.8
0.00
0.00
9681.6
0
38
4.2
9946
33.95
0.00
0.00
9.2
0.00
0.00
9946.4
0
39
4.0
10198
33.99
0.00
0.00
9.6
0.00
0.00
10197.5
0
40
3.8
10436
34.02
0.00
0.00
9.9
0.00
0.00
10435.7
0
41
3.6
10662
34.05
0.00
0.00
10.2
0.00
0.00
10661.7
0
42
3.4
10876
34.09
0.00
0.00
10.5
0.00
0.00
10876.0
0
43
3.2
11079
34.12
0.00
0.00
10.6
0.00
0.00
11079.2
0
44
3.0
11272
34.14
0.00
0.00
11.1
0.00
0.00
11271.9
0
45
2.9
11455
34.17
0.00
0.00
11.4
0.00
0.00
11454.8
0
46
2.7
11628
34.20
0.00
0.00
11.6
0.00
0.00
11628.2
0
47
2.6
11793
34.22
0.00
0.00
11.9
0.00
0.00
11792.6
0
48
2.5
11949
34.24
0.00
0.00
12.1
0.00
0.00
11948.6
0
49
2.3
12097
34.26
0.00
0.00
12.3
0.00
0.00
12096.5
0
50
2.2
12237
34.28
0.00
0.00
12.6
0.00
0.00
12236.8
0
51
2.1
12370
34.30
0.00
0.00
12.8
0.00
0.00
12369.9
0
52
2.0
12496
34.32
0.00
0.00
13.0
0.00
0.00
12496.1
0
53
1.9
12616
34.34
0.00
0.00
13.1
0.00
0.00
12615.8
0
54
1.8
11/29
34.36
U.UU
U.UU
13.3
0.00
0.00
12729.4
0
55
1.7
12837
34.37
0.00
0.00
13.5
0.00
0.00
12837.0
0
56
1.6
12939
34.39
0.00
0.00
13.7
0.00
0.00
12939.2
0
57
1.5
13036
34.40
0.00
0.00
13.8
0.00
0.00
13036.0
0
58
1.5
13128
34.41
0.00
0.00
14.0
0.00
0.00
13127.9
0
59
1.4
13215
34.43
0.00
0.00
14.1
0.00
0.00
13215.0
0
60
1.3
13298
34.44
0.00
0.00
14.2
0.00
0.00
13297.7
0
61
1.2
13376
34.45
0.00
0.00
14.4
0.00
0.00
13376.0
0
62
1.2
13450
34.46
0.00
0.00
14.5
0.00
0.00
13450.4
0
63
1.1
13521
34.47
0.00
0.00
14.6
0.00
0.00
13520.9
0
64
1.1
13588
34.48
0.00
0.00
14.7
0.00 -
0.00
13587.8
0
65
1.0
13651
34.49
0.00
0.00
14.8
0.00
0.00
13651.2
0
66
1.0
13711
34.50
0.00
0.00
14.9
0.00
0.00
13711.3
0
67
0.9
13768
34.51
0.02
0.00
14.9
0.00
0.02
13768.4
0
68
0.9
13822
34.52
0.05
0.00
15.0
0.00
0.05
13821.5
0
69
0.8
13870
34.52
0.08
0.00
15.0
0.00
0.08
13870.1
0
70
0.8
13914
34.53
0.12
0.00
15.1
0.00
0.12
13913.9
0
71
0.7
13953
34.53
0.15
0.00
15.1
0.00
0.15
13953.0
0
72
0.7
13988
34.54
0.19
0.00
15.1
0.00
0.19
13987.5
0
73
0.7
14018
34.54
0.22
0.00
15.2
0.00
0.22
14017.8
0
74
0.6
14044
34.55
0.25
0.00
15.2
0.00
0.25
14043.9
0
75
0.6
14066
34.55
0.28
0.00
15.2
0.00
0.28
14066.3
0
76
0.6
14085
34.55
0.30
0.00
15.2
0.00
0.30
14085.2
0
77
0.5
14101
34.56
0.32
0.00
15.3
0.00
0.32
14100.9
0
78
0.5
14114
34.56
0.33
0.00
15.3
0.00
0.33
14113.7
0
79
0.5
14124
34.56
0.35
0.00
15.3
0.00
0.35
14124.0
0
80
0.5
14132
34.56
0.36
0.00
15.3
0.00
0.36
14131.9
0
81
0.4
14138
34.56
0.36
0.00
15.3
0.00
0.36
14137.7
0
82
0.4
14142
34.56
0.37
0.00
15.3
0.00
0.37
14141.7
0
83
0.4
14144
34.56
0.37
0.00
15.3
0.00
0.37
14144.0
0
84
0.4
14145
34.56
0.37
0.00
15.3
0.00
0.37
14144.9
0
85
0.3
14145
34.56
0.37
0.00
15.3
0.00
0.37
14144.6
0
86
0.3
14143
34.56
0.37
0.00
15.3
0.00
0.37
14143.1
0
87
0.3
14141
34.56
0.37
0.00
15.3
0.00
0.37
14140.6
0
88
0.3
14137
34.56
0.36
0.00
15.3
0.00
0.36
14137.4
0
69
0.3
14133
34.56
0.36
0.00
15.3
0.00
0.36
14133.4
0
90
0.3
14129
34.56
0.35
0.00
15.3
0.00
0.35
14128.8
0
91
0.3
14124
34.56
0.35
0.00
15.3
0.00
0.35
14123.7
0
92
0.2
14118
34.56
0.34
0.00
15.3
0.00
0.34
14118.1
0
93
0.2
14112
34.56
0.33
0.00
15.3
0.00
0.33
14112.2
0
94
0.2
14106
34.56
0.32
0.00
15.3
0.00
0.32
14106.0
0
95
0.2
14100
34.56
0.32
0.00
15.3
0.00
0.32
14099.6
0
96
0.2
14093
34.56
0.31
0.00
15.3
0.00
0.31
14092.9
0
97
0.2
14086
34.55
0.30
0.00
15.2
0.00
0.30
14086.1
0
98
0.2
14079
34.55
0.29
0.00
15.2
0.00
0.29
14079.2
0
99
0.2
14072
34.55
0.28
0.00
15.2
0.00
0.28
14072.3
0
100
0.2
14065
34.55
0.27
0.00
15.2
0.00
0.27
14065.3
0
101
0.1
14058
34.55
0.27
0.00
15.2
0.00
0.27
14058.2
0
102
0.1
14051
34.55
0.26
0.00
15.2
0.00
0.26
14051.2
0
103
0.1
14044
34.55
0.25
0.00
15.2
0.00
0.25
14044.2
0

521r2"
Masonboro Family Medicine
07083
CLC
Infiltration Routing
1-year 244iour Storm
104
0.1
14037
34.55
0.24
0.00
15.2
0.00
0.24
14037.3
105
0.1
14030
34.55
0.23
0.00
15.2
0.00
0.23
14030.4
106
0.1
14024
34.55
0.23
0.00
15.2
0.00
0.23
14023.5
107
0.1
14017
34.54
0.22
0.00
15.2
0.00
0.22
14016.8
108
0.1
14010
34.54
0.21
0.00
15.2
0.00
0.21
14010.1
109
0.1
14004
34.54
0.21
0.00
15.2
0.00
0.21
14003.6
110
0.1
13997
34.54
0.20
0.00
15.2
0.00
0.20
13997.1
111
0.1
13991
34.54
0.19
0.00
15.1
0.00
0.19
13990.8
112
0.1
13985
34.54
0.19
0.00
15.1
0.00
0.19
13984.5
113
0.1
13978
34.54
0.18
0.00
15.1
0.00
0.18
13978.4
114
0.1
13972
34.54
0.17
0.00
15.1
0.00
0.17
13972.4
115
0.1
13967
34.54
0.17
0.00
15.1
0.00
0.17
13966.5
116
0.1
13961
34.54
0.16
0.00
15.1
0.00
0.16
13960.8
117
0.1
13955
34.54
0.16
0.00
15.1
0.00
0.16
13955.1
116
0.1
13950
34.53
0.15
0.00
15.1
0.00
0.15
13949.6
119
0.1
13944
34.53
0.15
0.00
15.1
0.00
0.15
13944.2
120
0.1
13939
34.53
0.14
0.00
15.1
0.00
0.14
139W.9
121
0.1
13934
34.53
0.14
0.00
15.1
0.00
0.14
13933.8
122
0.0
13929
34.53
0.13
0.00
15.1
0.00
0.13
13928.7
123
0.0
13924
34.53
0.13
0.00
15.1
0.00
0.13
13923.8
124
0.0
13919
34.53
0.12
0.00
15.1
0.00
0.12
13919.0
125
0.0
13914
34.53
0.12
0.00
15.1
0.00
0.12
13914.3
126
0.0
13910
34.53
0.11
0.00
15.1
0.00
0.11
13909.8
127
0.0
13905
34.53
0.11
0.00
15.1
0.00
0.11
13905.3
128
0.0
13901
34.53
0.11
0.00
15.1
0.00
0.11
13901.0
129
0.0
13897
34.53
0.10
0.00
15.0
0.00
0.10
13896.7
130
0.0
13893
34.53
0.10
0.00
15.0
0.00
0.10
13892.6
131
0.0
13889
34.53
0.10
0.00
15.0
0.00 -
0.10
13888.6
132
0.0
13885
34.52
0.09
0.00
15.0
0.00
0.09
13884.6
133
0.0
13881
34.52
0.09
0.00
15.0
0.00
0.09
13880.8
134
0.0
13877
34.52
0.09
0.00
15.0
0.00
0.09
13877.1
135
0.0
13873
34.52
0.08
0.00
15.0
0.00
0.08
13873.4
136
0.0
13870
34.52
0.08
0.00
15.0
0.00
0.08
13869.9
137
0.0
13866
34.52
0.08
OAO
15.0
0.00
0.08
13666.4
138
0.0
13863
34.52
0.08
0.00
15.0
0.00
0.08
13863.1
139
0.0
13860
34.52
0.07
0.00
15.0
0.00
0.07
13859.8
140
0.0
13857
34.52
0.07
0.00
15.0
0.00
0.07
13856.6
141
0.0
13853
34.52
0.07
0.00
15.0
0.00
0.07
13853.5
142
0.0
13850
34.52
0.07
0.00
15.0
0.00
0.07
13850.5
143
0.0
13848
34.52
0.06
0.00
15.0
0.00
0.06
13847.5
144
0.0
13845
34.52
0.06
0.00
15.0
0.00
0.06
13844.6
145
0.0
13642
34.52
0.06
0.00
15.0
0.00
0.06
13941.8
146
0.0
13839
34.52
0.06
0.00
15.0
0.00
0.06
13839.1
147
0.0
13836
34.52
0.06
0.00
15.0
0.00
0.06
13836.4
148
0.0
13834
34.52
0.05
0.00
15.0
0.00
0.05
13833.8
149
0.0
13831
34.52
0.05
0.00
15.0
0.00
0.05
13831.3
150
0.0
13829
34.52
0.05
0.00
15.0
0.00
0.05
13828.9
151
0.0
13826
34.52
0.05
0.00
15.0
0.00
0.05
13826.5
152
0.0
13824
34.52
0.05
0.00
15.0
0.00
0.05
13824.1
153
0.0
13822
34.52
0.05
0.00
15.0
0.00
0.05
13821.8
154
0.0
13820
34.52
0.05
0.00
15.0
0.00
0.05
13819.6
155
0.0
13817
34.52
0.04
0.00
15.0
0.00
0.04
13817.5
156
0.0
13815
34.51
0.04
0.00
15.0
0.00
0.04
13815.4
157
0.0
13813
34.51
0.04
0.00
15.0
U.W
0.04
13813.3
158
0.0
13811
34.51
0.04
0.00
15.0
0.00
0.04
13811.3
159
0.0
13809
34.51
0.04
0.00
15.0
6. W
0.04
13609.3
160
0.0
13807
34.51
0.04
0.00
15.0
0.00
0.04
13b07.4
181
1)0
..-.....
..._...
004
0.W
14.9
0,00
0.04
13805.6
1ti2
u.0
138U4
34.51
0.04
0.00
14.9
000
0.04
13803.8
163
0.0
13802
34.51
0.03
0.00
14.9
0.00
0.03
13802.0
164
U.0
13800
34.bl
UAW
0.00
14.0
0.'W
003
13E00 3
166
U.0
13191
34.51
U.03
0(H)
144
01X1
1:1.
167
0.0
13795
34.51
0.03
0.00
14.9
0.00
0.03
13795.4
168
0.0
13794
34.61
0.03
O.W
14:J
U.W
U.03
I-, IV-,

521r2008 Masonhom Family Medicine 07083
CDC Infiltration Trench _
Simple Method
WATERSHED DATA
Total Draina a Area
ft.
acres
71,003
1.63
Impervious Area
Land Use
s . ft.
I acres
Building
14,335
0.33
Concrete -
5,033
0.12
Asphalt
33,603
0.77
1
Total
52,971
1.22
INFILTRATION SYSTEM:
% impervious = 0.746
= 74.6%
say 74.6%
CPRE = 0.25
CPOST= (%imp.)(.95)+(1-%imp.)(.25)
0.78
12 = 5.06 infhr
110 = 6.30 inthr
125 = 7.13 inlhr
Volume of mnott= (Design rainfall)(Rv)(Orainage Ama)(3630)
V re= 1,095 cu-ft V - 15,794
ital Volume provided: Based on 40% void space in stone and 100% void space for pipe
Area (so Length(R) Volume(cft) Area (so Elevatfon(R)
8'pipe 1.4 1000 1400 Bottom: 17,143 32.5
12'pipe 3.14 522 1639 Flood: 17,143 34.5
Vt = ((Volume of trench - Volume of Pipe) x 0.40)4Volume of Pipe
Vt = 15,538 cu-ft I Vt > Vmin OK
DRAWDOWN RATE:
RATE OF INFILTRATION 6 INIHR
DEPTH OF BASIN: 24 IN
DRAW DOWN RATE: HRS
CAROB
2Q.oFESS/6y�9��
•a SEAL 9�:
032555 ;
.`'VG I WE -'����
ES
1 111 i I I
i

5/21/2008 Masonboro Family Medicine 07083
CLC Infiltration Routing _
1-year 24-hour Storm
WATERSHED DATA
WATERSHED AREA
1.63 ACRES
HYDRAULIC LENGTH
360 FT
CHANGE IN HEIGHT
1 FT
RUNOFF COEF.'C'
0.25
TIME OF CONCENTR
5.00 MIN
INTENSITY 1 YR
5.67 IN/HR
Oa = 2.31 CFS
Oa = PRE -DEVELOPED PEAK DISCHARGE
COMPUTE DEPTH OF RUNOFF
P = 3.7 INCHES 1yr, 24hr PRECIPITATION
CN = 88.5
S = (1000/CN)-10
S= 1.30
Depth (D) _ (P-0.2S)^2/(P+0.8S)
D= 2.50 IN- 1yr, 24hr RUNOFF DEPTH
SET VOLUME AND COMPUTE TIME TO PEAK
Tp = ((43.5)(D)(Area)] / Op
TIP = 24.56 MINUTES
Storage Volume Req'd = (Op-Oa)'Tp'1.39'60
= 10,033 cu. ft.
CALCULATE Ks AND b
SET NORMAL ELEVATION AT = 32.50 feet
WATERSHED AREA
1.83 ACRES
HYDRAULIC LENGTH
218 FT
CHANGE IN HEIGHT
1.5 FT
RUNOFF COEF.'C'
0.78
TIME OF CONCENTR
5.00 MIN
INTENSITY 1 YR
5.67 IN/HR
OP= 7.21 CFS
Dip = POST -DEVELOPED PEAK DISCHARGE
S
Z
CONTOUR
INCR
ACCUM
CONTOUR
AREA
VOL*
VOL
STAGE
In S
In Z
Z est
(sq ft)
(cu ft)
(cu ft)
(ft)
(ft)
32.5
17,143
0
0
0
0
0
0
33.5
17,143
6,857
6,857
1.0
8.8331
0
1.00
34.5
17,143
6,857
13,714
2.0
9.5262
0.6931
2.00
35.5
3,429
17, 143
3.0
9.7493
1.0986
2.50
36.5
-
17,143
4.0
9.7493
1.3863
2.50
37.5
-
17.143
5.0
9.7493
1.6094
2.50
Regression Output:
=_> Ks = 6857
b = 1.00
Constant 8.83

5/21/2008 Masonboro Family Medicine 07083
CLC Infiltration Routing _
1-year 24-hour Storm
CHAINSAW METHOD FOR
RISER BARREL ROUTING
STORM DATA
Oa =
2.31 cfs
OP =
7.21 cfs
TIP =
24.6 min
dT =
1 min
BASIN DATA
Ks =
6857
Infiltration
Rate =
0 in/hr
b =
1.00
Flow Rate through
bottom =
0.00 cfs
Zo =
32.5 It
Normal water elev =
32.5 it
Peak Outflow =
0.37 cfs
Box Weir
Length =
0 ft
Peak Stage =
34.56 ft
Cw =
3.0
Maximum Storage =
14,138 cu It
Zcr =
34.50 It
Control Holes:
State Orifice:
Dia =
0.00 in
Dd =
24 in
Inv =
32.5 It
Cd =
0.59
Weir:
L =
36 in
Zi =
32.5 ft
Inv =
34.50 It
Time
Inflow
Storage
Stage
Outflow
W Riser
Barrel Orifice
City Weir
IFStore
Infiltrate
(min)
(cfs)
(cu ft)
(ft)
(cfs)
(cfs)
_. (cfs)_
(cfs)__
(cu ft)
(cu fl)_
0
0.0
0
32.50
0
0
,
0
0
_ _ _(cfs)
0.00
0.0
0
1
0.0
0
32.50
0
0.00
0
0
0.00
0.0
0
2
0.1
2
32.50
0.00
0.00
0.0
0.00
0.00
1.8
0
3
11 A
v
3[.:M1
U (x)
0.01)
0.0
0.00
0.00
8.8
0
4
u.5
25
32.bU
0.00
0.00
0.0
0.00
0.00
24.5
0
5
0.7
52
32.51
0.00
0.00
0.0
0.00
0.00
52.2
0
6
1.0
95
32.51
0.00
0.00
0.0
0.00
0.00
95.0
0
1
1.4
156
32.52
0.00
0.00
0.0
0.00
0.00
155.6
0
8
1. /
237
32.53
0.00
0.00
0.0
0.00
0.00
236.7
0
9
2.1
340
&55
0.00
0.00
0.1
0.00
0.00
340.4
0
10
2.6
469
32.57
0.00
0.00
0.1
0.00
0.00
468.5
0
11
3.0
623
32.59
0.00
0.00
0.1
0.00
0.00
622.6
0
12
3.5
804
32.62
0.00
0.00
0.2
0.00
0.00
803.6
0
13
3.9
1012
32.65
0.00
0.00
0.3
0.00
0.00
1012.2
0
14
4.4
1248
32.68
0.00
0.00
0.4
0.00
0.00
1248.3
0
15
4.8
1512
32.72
0.00
0.00
0.5
0.00
0.00
1511.8
0
16
5.3
1802
32.76
0.00
0.00
0.7
0.00
0.00
1801.8
0
17
5.7
2117
32.81
0.00
0.00
0.9
0.00
0.00
2117.2
0
18
6.0
2456
32.86
0.00
0.00
1.1
0.00
0.00
2456.2
0
19
6.3
2817
32.91
0.00
0.00
1.4
0.00
0.00
2817.0
0
20
6.6
3197
32.97
0.00
0.00
1.7
0.00
0.00
3197.1
0
21
6.8
3594
33.02
0.00
0.00
2.0
0.00
0.00
3593.9
0
22
7.0
4004
33.08
0.00
0.00
2.4
0.00
0.00
4004.4
0
23
7.1
4425
33.15
0.00
0.00
2.7
0.00
0.00
4425.4
0
24
7.2
4854
33.21
0.00
0.00
3.1
0.00
0.00
4853.6
0
25
7.2
5286
33.27
0.00
0.00
3.6
0.00
0.00
5285.6
0
26
7.1
5718
33.33
0.00
0.00
4.0
0.00
0.00
5717.8
0
27
7.0
6147
33.40
0.00
0.00
4.5
0.00
0.00
6146.7
0
28
6.9
6569
33.46
0.00
0.00
4.9
0.00
0.00
6568.7
0
29
6.6
6981
33.52
0.00
0.00
5.4
0.01)
0.00
6980.7
0
30
6.4
7379
33.58
0.00
0.00
5.9
0.00
0.00
7379.2
0
31
6.1
7761
33.63
0.00
0.00
6.3
0.00
0.00
7761.5
0
32
5.8
8125
33.68
0.00
0.00
6.8
0.00
0.00
8125.3
0
33
5.5
8470
33.74
0.00
0.00
7.2
0.00
0.00
8470.3
0
34
5.2
8798
33.78
0.00
0.00
7.7
0.00
0.00
8797.6
0
35
4.9
9108
33.83
0.00
0.00
8.1
0.00
0.00
9108.0
0
36
4.7
9402
33.87
0.00
0.00
8.5
0.00
0.00
9402.4
0

5/2112008
Ma nboro Family Medicine
07083
CLC
Infiltration Routing
_
1-year 24-hour Storm
37
4.4
9682
33.91
0.00
0.00
8.8
0.00
0.00
9681.6
0
38
4.2
9946
33.95
0.00
0.00
9.2
0.00
0.00
9946.4
0
39
4.0
10198
33.99
0.00
0.00
9.6
0.00
0.00
10197.5
0
40
3.8
10436
34.02
0.00
0.00
9.9
0.00
0.00
10435.7
0
41
3.6
10662
34.05
0.00
0.00
10.2
0.00
0.00
10661.7
0
42
3.4
10876
34.09
0.00
0.00
10.5
0.00
0.00
10876.0
0
43
3.2
11079
34.12
0.00
0.00
10.8
0.00
0.00
11079.2
0
44
3.0
11272
34.14
0.00
0.00
11.1
0.00
0.00
11271.9
0
45
2.9
11455
34.17
0.00
0.00
11.4
0.00
0.00
11454.8
0
46
2.7
11628
34.20
0.00
0.00
11.6
0.00
0.00
11628.2
0
47
2.6
11793
34.22
0.00
0.00
11.9
0.00
0.00
11792.6
0
48
2.5
11949
34.24
0.00
0.00
12.1
0.00
0.00
11948.6
0
49
2.3
12097
34.26
0.00
0.00
12.3
0.00
0.00
12096.5
0
50
2.2
12237
34,28
0.00
0.00
12.6
0.00
0.00
12236.8
0
51
2.1
12370
34.30
0.00
0.00
12.8
0.00
0.00
12369.9
0
52
2.0
12496
34.32
0.00
0.00
13.0
0.00
0.00
12496.1
0
53
1.9
12616
34.34
0.00
0.00
13.1
0.00
0.00
12616.8
0
54
1.6
1'2729
34.36
U.w
0.00
13,3
0.00
0.00
12729.4
0
55
1.7
12837
34.37
0.00
0.00
13.5
0.00
0.00
12837.0
0
56
1.6
12939
34.39
0.00
0.00
13.7
0.00
0.00
12939.2
0
57
1.5
13036
34.40
0.00
0.00
13.8
0.00
0.00
13036.0
0
58
1.5
13128
34.41
0.00
0.00
14.0
0.00
0.00
13127.9
0
59
1.4
13215
34.43
0.00
0.00
14.1
0.00
0.00
13215.0
0
60
1.3
13298
34.44
0.00
0.00
14.2
0.00
0.00
13297.7
0
61
1.2
13376
34.45
0.00
0.00
14.4
0.00
0.00
13376.0
0
62
1.2
13450
34.46
0.00
0.00
14.5
0.00
0.00
13450.4
0
63
1.1
13521
34.47
0.00
0.00
14.6
0.00
0.00
13520.9
0
64
1.1
13588
34.48
0.00
0.00
14.7
0.00 ..
0.00
13587.8
0
65
1.0
13651
34.49
0.00
0.00
14.8
0.00
0.00
13651.2
0
66
1.0
13711
34.50
0.00
0.00
14.9
0.00
0.00
13711.3
0
67
0.9
13768
34.51
0.02
0.00
14.9
0.00
0.02
13768.4
0
68
0.9
13822
34.52
0.05
0.00
15.0
0.00
0.05
13821.5
0
59
0.5
13870
34.52
0.08
0.00
15.0
0.00
0.08
13870.1
0
70
0.8
13914
34.53
0.12
0.00
15.1
0.00
0.12
13913.9
0
71
0.7
13953
34.53
0.15
0.00
15.1
0.00
0.15
13953.0
0
72
0.7
13988
34.54
0.19
0.00
15.1
0.00
0.19
13987.5
0
73
0.7
14018
34.54
0.22
0.00
15.2
0.00
0.22
14017.8
0
74
0.6
14044
34.55
0.25
0.00
15.2
0.00
0.25
14043.9
0
75
0.6
14066
34.55
0.28
0.00
15.2
0.00
0.28
14066.3
0
76
0.6
14085
34.55
0.30
0.00
15.2
0.00
0.30
14085.2
0
77
0.5
14101
34.56
0.32
0.00
15.3
0.00
0.32
14100.9
0
76
0.5
14114
34.56
0.33
0.00
15.3
0.00
0.33
14113.7
0
79
0.5
14124
34.56
0.35
0.00
15.3
0.00
0.35
14124.0
0
80
0.5
14132
34.56
0.36
0.00
15.3
0.00
0.36
14131.9
0
81
0.4
14138
34.56
0.36
0.00
15.3
0.00
0.36
14137.7
0
82
0.4
14142
34.56
0.37
0.00
15.3
0.00
0.37
14141.7
0
83
0.4
14144
34.56
0.37
0.00
15.3
0.00
0.37
14144.0
0
84
0.4
14145
34.56
0.37
0.00
15.3
0.00
0.37
14144.9
0
85
0.3
14145
34.56
0.37
0.00
15.3
0.00
0.37
14144.6
0
86
0.3
14143
34.56
0.37
0.00
15.3
0.00
0.37
14143.1
0
87
0.3
14141
34.56
0.37
0.00
15.3
0.00
0.37
14140.6
0
88
0.3
14137
34.56
0.36
0.00
15.3
0.00
0.36
14137.4
0
89
0.3
14133
34.56
0.36
0.00
15.3
0.00
0.36
14133.4
0
90
0.3
14129
34.56
0.35
0.00
15.3
0.00
0.35
14128.8
0
91
0.3
14124
34.56
0.35
0.00
15.3
0.00
0.35
14123.7
0
92
0.2
14118
34.56
0.34
0.00
15.3
0.00
0.34
14118.1
0
93
0.2
14112
34.56
0.33
0.00
15.3
0.00
0.33
14112.2
0
94
0.2
14106
34.56
0.32
0.00
15.3
0.00
0.32
14106.0
0
95
0.2
14100
34.56
0.32
0.00
15.3
0.00
0.32
14099.6
0
96
0.2
14093
34.56
0.31
0.00
15.3
0.00
0.31
14092.9
0
97
0.2
14086
34.55
0.30
0.00
15.2
0.00
0.30
14086.1
0
98
0.2
14079
34.55
0.29
0.00
15.2
0.00
0.29
14079.2
0
99
0.2
14072
34.55
0.28
0.00
15.2
0.00
0.28
14072.3
0
100
0.2
14065
34.55
0.27
0.00
15.2
0.00
0.27
14065.3
0
101
0.1
14058
34.55
0.77
0.00
15.2
0.00
0.Z7
14058.2
0
102
0.1
14051
34.55
0.26
0.00
15.2
0.00
0.26
14051.2
0
103
0.1
14044
34.55
0.25
0.00
15.2
0.00
0.25
14044.2
0

521/2008
Masonbaro Famty Medicine
07083
CLC
Infdbabon Routing
r
1-year 244wur Storrs
104
0.1
14037
34.55
0.24
0.00
15.2
0.00
0.24
14037.3
105
0.1
14030
34.55
0.23
0.00
15.2
0.00
0.23
14030.4
106
0.1
14024
34.55
0.23
0.00
15.2
0.00
0.23
14023.5
107
0.1
14017
34.54
0.22
0.00
15.2
0.00
0.22
14016.8
108
0.1
14010
34.54
0.21
0.00
15.2
0.00
0.21
14010.1
109
0.1
140D4
34.54
0.21
0.00
15.2
0.00
0.21
14003.6
110
0.1
13997
34.54
0.20
0.00
15.2
0.00
0.20
13997.1
111
0.1
13991
34.54
0.19
0.00
15.1
0.00
0.19
13990.8
112
0.1
13985
34.54
0.19
0.00
15.1
0.00
0.19
13984.5
113
0.1
13978
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\o�oF waT F9�c
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O Y
May 13, 2008
Kimberly J. Martin, Member Manager
A & K of Wilmington, LLC
6132-8 Carolina Beach Road
Wilmington, NC 28412
Subject: Request for Additional Information
Stormwater Project No. SW8 080426
Masonboro Family Medicine
New Hanover County
Dear Mrs. Martin:
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen 11. Sullins Director
Division of Water Quality
The Wilmington Regional Office received corrections to an NPDES Phase II Post Construction
Permit Application for Masonboro Family Medicine on May 1, 2008. A review of that
information has determined that the application is not complete. The following information is
needed to continue the stormwater review:
The cover letter addressing the comments sent May 6, 2008 stated that the simple
method was used to calculate the stormwater runoff. Revised calculations reflecting
this change was not submitted, please submit.
The original infiltration trench supplemental form called for a 1-yr 24-hr storm of 3.7
inches. The supplemental form submitted with corrections called for a 1-yr 24-hr storm
of 2.4 inches. Given that a 3.7 inch storm event is typical for the New Hanover County
area please justify this change or make the necessary corrections.
Please note that this request for additional information is in response to a preliminary review.
The requested information should be received in this Office prior to May 20, 2008, 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 need additional time to submit the information, please mail, email or fax your request for
a time extension to the Division at the address and fax number at the bottom of this letter. The
request must indicate the date by which you expect to submit the required information. The
Division is allowed 90 days from the receipt of a completed application to issue the permit.
The construction of any impervious surfaces, other than a construction entrance under an
approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject
to enforcement action pursuant to NCGS 143-215.6A.
Because the application has significant permitting issues/deficiencies, a resubmittal fee
of $1,000 will be required in order for this project to remain in the express program.
NothCaiolina
Aurally
North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone [phone] Customer Service
Wilmington Regional Office IntemeC w�vw.ncwaternuality.ore Fax [phone]
An Equal OpportunitylAltirmative Action Employer - 50% Recycled110% Post Consumer Paper

"•Kimberly J. Martin, Member Manager
May 6, 2008
Stormwater Application No. SW8080426
Please reference the State assigned project number on all correspondence. Any
original documents that need to be revised have been sent to the engineer or agent. All
original documents must be returned or new originals must be provided. Copies are not
acceptable. If you have any questions concerning this matter please feel free to call me
at [phone] or email me at [e-mail].
Sincerely,
Chris Baker
Environmental Engineer II
ENB/csb: S:\WQS\STORMWATER\ADDINFO\2008\080426#2.may08
CC: Charles Cazier, P.E., Tripp Engineering, P.C.
File
Page 2 of 2

TRwp ENGINEERING, P.C.
0 419 Chestnut Street
Wilmington, North Carolina 28401
Phone: [phone] • FAX: [phone]
May 12, 2008
NCDENR
Division of Water Quality
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn: Mr. Chris Baker
Re: Masonboro Family Medicine
Project No. SW8 080426
TE 07083
Dear Chris:
In response to your comments dated May 6, 2008, we offer the following:
1. Adequate dimensioning has been provided.
2. Lengths of pipes have been specified.
3. The simple method has been used to estimate stormwater runoff.
4. The I-yr 24-fir storm capacity has been used to size the required amount
of storage.
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,
141�Zy 4M
Enc.

Michael 17, Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen 11. Sullins Director
Division of Water Quality
May 6, 2008
Kimberly J. Martin, Member Manager
A & K of Wilmington, LLC
6132-8 Carolina Beach Road
Wilmington, NC 28412
Subject: Request for Additional Information
Stormwater Project No. SW8 080426
Masonboro Family Medicine
New Hanover County
Dear Mrs. Martin:
The Wilmington Regional Office received an NPDES Phase II Post Construction Permit
Application for Masonboro Family Medicine on March 29, 2008. 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. Please provide adequate dimensioning for the infiltration trench footprint.
2. Typical spacing is called out for the infiltration piping. Please call out the typical length
3. It appears the SCS method was used to determine the stormwater runoff. NCDENR
allows only the simple method or the rational equation to be used to estimate
stormwater runoff, please correct.
4. A 1.5" design rainfall was used for the required infiltration trench volume. Phase II rules
for SA waters require the 1 year 24 hour storm capacity, please correct.
Please note that this request for additional information is in response to a preliminary review.
The requested information should be received in this Office prior to May 13, 2008, 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 need additional time to submit the information, please mail, email or fax your request for
a time extension to the Division at the address and fax number at the bottom of this letter. The
request must indicate the date by which you expect to submit the required information. The
Division is allowed 90 days from the receipt of a completed application to issue the permit.
The construction of any impervious surfaces, other than a construction entrance under an
approved Sedimentation Erosion Control Plan, is a violation of NCGS 143-215.1 and is subject
to enforcement action pursuant to NCGS 143-215.6A.
Onr.
NthCarolina
Aurally
North Carolina Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Phone [phone] Customer Service
Wilmington Regional Office Internet: www.newateraualitv.ore Fax [phone]
An Equal OpportunitylAffirmative Action Employer — 50% Recycled110 % Post Consumer Paper

Kimberly J. Martin, Member Manager
May 6, 2008
Stormwater Application No. SW8080426
Please reference the State assigned project number on all correspondence. Any
original documents that need to be revised have been sent to the engineer or agent. All
original documents must be returned or new originals must be provided. Copies are not
acceptable. If you have any questions concerning this matter please feel free to call me
at [phone] or email me at [e-mail].
Sincerely,
Chris Baker
Environmental Engineer II
ENB/csb: S:\WQS\STORMWATER\ADDINFO\2008\080426.may08
CC: Charles Cazier, P.E., Tripp Engineering, P.C.
File
Page 2 of 2

TRIPP ENGINEERING, P.C.
419 Chestnut Street
Wilmington, North Carolina 28401
Phone: [phone] • FAX: [phone]
April 29, 2008
NCDENR
Division of Water Quality
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn: Mr. Chris Baker
Re: Masonboro Family Medicine
New Hanover County, NC
TE 07083
Dear Chris:
APR 2 ,9 2008
fn response to your comments at our meeting this morning, we provide the
following:
• Two sets of revised plans.
• A signed operation and maintenance agreement for the filter strip.
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, P.E
CDC:dcb
Ene.

TRIPP ENGINEERING, P.C.
419 Chestnut Street
Wilmington, North Carolina 28401
Phone: [phone] • FAX: [phone]
April 29, 2008
NCDCNR
Division of Water Quality
127 Cardinal Drive
Wilmington, NC 28405-3845
Attn: Mr. Chris Baker
Re: Masonboro Family Medicine
New Hanover County, NC
TE 07083
Dear Chris:
Enclosed please find two (2) sets of plans, one (1) stormwater permit application
form with narrative, one (1) infiltration trench supplement, two (2) sets of calculations,
and one check for the application fee.
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 1). Cazier, P. .
CDC:dcb
Enc.

Apr.28. 2008 9:02AM
No.4807 P. 2
�I.
.r ASON'BORO FJLM1-CY AlEDICINE,
6132-8 C-AROLINA BEACH R0.91E
1NILAINGTON, NORT.N C AROLINs7
[phone] Fax [phone]
CONSENTFORM
P.C.
28412
We/I, Andrew N. Illobre. PAC and/or Kimberly J. Martin, PAC of Masonboro
Family Medicine, PC recognize Eddie Crowell of Crowell Contractors. Inc as our
appointed representative.
Signed:
tAnndrew N. Illobbre, PAC
Date: G 2-1 2' U e,
And reiv N. ICCobre, P-A-C
9Cim6erCy J. Martin, P.A-C
Signed: &/ j —
Kimberly J. Martin, PAC
Date:
"I ifamH.. Jones, N.D.,
Barton G. -WiCCiams, NI.D.

April 17, 2008
Stormwater Narrative
Masonboro Family Medicine
New Hanover, NC
TE 07083
The Masonboro Family Medicine is a 1.63 acre existing vacant tract proposed for a three
medical office buildings. This drainage basin will contain 33,603 sf of pavement (which
includes 1,146 sf of pervious parking), 5,033 sf of concrete and 14,335 sf of building for
a total impervious area of 52,971 sf. The total percent impervious is 74.6%.
The project will be designed as high density and the stormwater treatment will be
handled by an underground infiltration basin. Design volumes are generated from the
1.5" storm design and also contain the 1 yr. 24 hr. pre -post requirement. The drainage
basin eventually drains into the ICWW, classification SA-ORW 18-87-25.5.

Re: Masonboro Family Medicine
Subject: Re: Masonboro Family Medicine
From: "Phillip Tripp" <[e-mail]>
Date: Fri, 25 Apr 2008 13:00:07 -0400
To: <[e-mail]>
Janet,
Yes, please keep our date. Charlie will be there Tuesday, April 29 at 8:30 am with
the owner's contractor and an agent authorization from the owner.
Thank you,
Phil
NOTICE: This electronic correspondence and all attachments may contain privileged
information intended only for the use of the addressee. Any information contained
within this correspondence is provided for your convenience. No assertion of
accuracy is made by Tripp Engineering, P.C. unless physical documents are obtained,
sealed AND signed. User assumes all responsibility for use of this digital
information.
----- Original Message ----- From: "Della" <[e-mail]>
To: "'Phil Tripp'" <[e-mail]>
Sent: Friday, April 25, 2008 11:34 AM
Subject: FW: Masonboro Family Medicine
Do we want to confirm. Can the owner be there???
-----Original Message -----
From: Janet Russell[mailto:[e-mail]]
Sent: Thursday, April 24, 2008 6:52 PM
To: Phillip Tripp
Subject: Masonboro Family Medicine
April 24, 2008
*Masonboro Family Medicine
*Phil:
The Express Group had offered you a stormwater submittal meeting date of
*April 29 at 8:30 with Chris Baker*. However, I don't think anyone ever
confirmed that you can make that meeting date with your client. Should
I hold this date for you or give it away?
Please let me know on Friday.
Thanks,
Janet
I of 1 4/25/2008 2:01 PM

aboucblank
Masonboro Family Medicine
April 22, 2008
The Department of Environment & Natural Resources, Express Permitting Group, is in receipt of your
Request for processing of an express stormwater application. The Express Stormwater submittal
meeting for Masonboro Family Medicine has been scheduled with Chris Baker on April 29, 2008 at
8:30 AM here in the Wilmington Regional Office, 127 Cardinal Drive Ext. The applicant is required
to attend the meeting or send a representative from their company.
Please review the attachment, submittal requirements. Be sure to use the most current stormwater
application form, supplements, operation and maintenance agreement, checklist, etc. Please be sure
that your project is designed to meet the Phase II stormwater rules as outlined in the Session Law
(pages 14, 15, etc.). A copy is attached.
The Express Fee for a high density Express review is $4,000.00 payable by check at the submittal
meeting.
Please respond within 2 business days to confirm and reserve this submittal meeting date / time. If
this date or time does not work for you, please let me know and we will schedule another date.
Thanks,
Janet Russell
Express Coordinator
I of 1 4/22/2008 2:53 PM

RE: Masonboro family Medicine
Subject: RE: Masonboro Family Medicine
From: "Della" <[e-mail]>
Date: Fri, 19 Apr 2009 12:15:12 -0400
To: "'Janet Russell"' <Janet.Russel [e-mail]>
Janet,
Thank you for your quick reply. In response to your questions...
1) Project drains directly to the waterway, SA ORW.
2) Yes, there is only one infiltration trench proposed.
3) Infiltration site visit request has already gone to Vincent Lewis and he
has scheduled the visit for Monday.
4) Yes, it has been designed to meet the phase II rules.
5) pdf site plan is attached.
6) Vicinity map with address and landmarks is attached.
7) Yes, application package is ready to submit.
Please let us know the next available review date. Thank you.
Della Baird
-----Original Message -----
From: Janet Russell[mailto:[e-mail]]
Sent: Friday, April 18, 2008 9:30 AM
To: Phillip Tripp
Subject: Masonboro Family Medicine
April 18, 2008
*Masonboro Family Medicine
*Phil:
The Express Permitting Group is in receipt of the Express Request for
the above -referenced project. *As a note, all Express Requests should
be forwarded to me (Express Coordinator), not Linda Lewis.
*1) Provide the name and classification of the stream this proposed
project is draining to. Projects within 1/2 mile of SA waters are
subject to stricter design requirements. We need to know if the project
is within the 1./2 mile radius.
2) Please clarify that there is one (1) infiltration trench proposed.
ff4 on the questionnaire is blank.
3) Please fill out and return the Infiltration Site Visit Request
(attached) with the soils report and site plan showing the boring
locations so that we can get Vincent Lewis scheduled to make the site
visit to confirm the soils consultant's findings.
4) Tell us whether or not the project has been designed to meet the
federal Phase II stormwater rules as outlined in the Session Law,
attached. Please see pages 14, 15, etc. for the design requirements.
Projects in New Hanover, Brunswick & Onslow are subject to these
requirements and they are _not _spelled out in the BMP Manual.
5) Submit a pdf site plan.
6) Submit a specific vicinity map with landmarks and address of proposed
project so that we can find the site.
6) Disclose whether or not the application package is ready to submit.
We are currently 2 weeks out with the scheduling.
I am placing your Request on hold pending receipt of this information.
Thanks,
Janet Russell
I oft 4/18/2008 12:28 PM

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APR 17,200B 04:24P Tripp Engineering 9107635631
page 1
Job No, 07083
41 Date: 4/17/2008
TRIPP ENGINEERING, P.C.
419 Chestnut Strcct, Wilmington, NC 28401
Phone: [phone] • FAX: [phone]
Email: trippeng(%)ec.rr.com
LETTER OF TRANSMITTAL
To: NCDENR
Attention: Linda Lewis
Subject: _ Masonboro Family Medicine
X FAX TRANSMITTAL: NUMBER OF PAGES INCLUDES COVER 5
I am sending you: ( ) ATTACHED ( ) UNDER SEPARATE COVER
( ) Prints ( ) Tracings ( ) Copy of letter ( ) Specifications ( ) Other
Copies Item N4,... 03SSCIR1i91L_............. ........ _.
1 Express Cover Letter
1 Express Ouestionairre
1 Location Mao
These are transmitted as checked below:
( ) For Approval ( ) For Your Use ( ) Sign & Return ( ) Review
Remarks:
cc:
Signed: Charles Cazier
j1E C E I V ED
I�,O{ APR 17 2008
DWQ
PROJ #

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• MaenlWlla{•hnkk Dragon 7064AXIM or pamWkamaanaMncmaa.nat
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• Wlmholon RoplorKboot Russw/10J50.2co4 of NnalruuetlmnemaiLat
NOTE Prgkcl appica0on recoiled after 12 r rea will be sfempel M 0w roa0wing Kek day.
Pigaq Name: MASONBORO FAMILY MEDICINE County: NEW HANOVER
Applicant: IOMBERLY MARTIN Company: li6K.QF,IyJIMiNGTON. LLC
Addmss:S132-a CAROUNA BEACH RD. Clry:WILMINGTON State.NC ZIPt2B412
Phom:910,79 §@Q Fax[phone] Email: _
Project b Drains Into CAPE FEAR water project Located in CAPE FEAR River Basin
ErgineerlComdlont: r!111LUP. G. TRIPP Company. Trion Enaineedrd
Address:419 CHESTNUT ST. Cry WILMINGTON. Slate: & Zip: %lbS1
Phone: [phone] Fax::910-71IMi Email: biQ0 -gft rr.mm
(Chadtallthstapply)
uqb-, )t k \
refs j oeetea:1
rr Dal":I
"SrL)fA^ —. 1„l, MQJbe—k1SW&L.,
�� � r � � bill so tti-t'I.. • nc�
s^ MM A-r+'k nj 6`•So LAV,
S ISV O �-w
❑ ecbping Meeting NQyY ❑ OWO, ❑ DCM, ❑ OLR, ❑ OTHER:
fl stream onain Datamsnion 1 of straam cans - Please attach TOPO map mankap 0a Omits in auost& . ,
W- Stonmratar ❑ General I l SFR, r-IBkhd E Bl Rmp, q Clear 6 Grob, p Utility
❑ Low Densny ❑ Low DensrlyCurb d Guns _ 0 Cum Outlet Swamis ❑ OR -site [SW _(Provide permit l)l
❑ Hlgh 0arusy4ztamton Pond _ a Tre07WO Syeteas ® Nkje DenW-InNbaSon j RTI ddFW systems
❑High Oeeity•Blo-Relengal_ R Treatment Systems nHlyli Deisny-ConstmctNe Wetlands _O Trt�menl Systems
UHigh Dmshy-Oder _gTroalmoMSysfens ❑MODIFICATION SW_(Praldepermit#)
❑ Coastal Management ❑ Excavator 6 Fill ❑ Bftos d Culvert& ❑ Saucluras Information
❑ Upland Development ❑ Marina OevelWrenl ❑ Urban Watelfront
❑ land owaey ❑ Erosion and Se?mmtafiar Cantr l Plan with _ roes to be dplurbad.(CK 0_ (for DENR use))
MMANOS WESTIDNS WSTDEAODRESSED R&M
n Wetlands (401): Chs A all that so* Isolated wetland on Property ❑ Yon: ® No . —
Wetlands un Eta ❑ Yes ® No Buffer Impacts: ❑ No ❑ YES: wcre(s)
Warlords Delineation her been mmplolod: [_j Yes ❑ No Minor Varlimm: ❑ No ❑ YES
US ALOE Approval of Delineation cangbled: ❑ Yes n No Major General Variance ❑ No D YES
404 Appecabon in Proms vd US ACOE: ] Yes ❑ No 401 Application required: ❑Yes ❑ No II YES, n Regular
Permit Recolved from US ACRE ❑ Yes ❑ No Permnlal, Blue lire stream, etc an silo ❑ yw ❑ No
For OENR use only
1 -Cre"Nc- LN
nE C E I V E
►OI�Ui APR 17 2008 D
PROD # DWQ

APR 17,2008 04:25P Tripp Engineering 9107635631 page 3
Project Name Masonboro Fa ' dicine
stormwater Express Questionnaire (7/10/2007)
What is the applicant's full legal name? Kimberly Martin
Is the applicant associated with Q Sole proprietor Corporation ® LLC
Li Partnership B Municipality
If it's an LLC, is it ❑ Manager -managed or Member -managed?
pWhat is the applicant's title within the Corp., LLC or Partnership? Manager
II an agent (someone other than the applicant) be signing the applicatlon? es ® No
If Yes, what is the agent's name and title?
OPlease note the 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 o! a
partnership, or a ranking official of
o municipality may sign parrot applications and supplements,
The signature o! the engineer or other agent can be accepted only i accompanied by a signed
letter of authorization from one of the aforementioned individuals. Corporations, LLC
end
Partnerships must be registered with the NC Secretary of State 8 Office, end be active. Please
note that spelling, capitalization, and punctuation are extremely important. Please provide the
entry name exactly as on file with the NC Secretary oI State.
2 Where is the project located?
County New Hanover Nearest Town/City _Wilmington
(Attach a7r a ailed vicinity map with both local street names and SR, NC, or nterstate
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 Ponder 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
demonstrated, which is dated prior to July 1, 2007.
3. What is the name of the receiving stream?_KWW
What River Basin is it located In? _Cape Fearl
What is the classification of the receiving stream? SA-QRW-1
For SA or SR waters, a separate scaled topographic map wfll be required. The protect must e
accurately located on the map and the Y4 mile radius from the property comer closest to the SA
or SR receiving stream must be drawn on the map. If you claim that the project is not within 14
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 X 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 P-NPDE$
Infiltration Tre`nch7 Infiltration Basin Sand Fitter
Bio-retention Wetlands Alternative B Offsite
Dry Detention Phase II Other
How many separate BMP's are being proposed? 1 2 3 4 5 6 7 8 9 10 11 12 Other
5. Is there offsits runoff from the adjacent properties or public rlght-of-way that will drain into any of
the proposed BMP's on the project and is not being diverted? U Yes ® No ❑ NIA
6. Is a road across other property required to access the project? ❑ Yes ® No ❑ NIA
j�E C E I V En
�U^(u APR 17 2008 ILhJII
DWO
PROJ p -- --

I , APR 17,200E 04:25P Tripp Engineering 9107635631
page 4
Project Name Masonboro Family Medicine
7. Is there any existing development or pre-1988 existing BUA located on the pro rt ?
(Please document, delineate and Identify on the plans.) ❑ Yes lJ No ® N/A
B. Will the high density project collect all of the proposed BUA? ® Yes ❑ No ❑ N/A
(If not, attach a separate explanation sheet)
9. Will the project invo ve the subdivision and sale of property? ❑ Yes E No ElN/A
Is the subdivlSlon residential or ❑ commercial?
How many lots are proposed? _NIA
(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 E NIA
(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 adjacent
wetlands? ❑ Yes [:I No ® N/A
(lf yes, a physical means to prevent the dewatering of the wetland must be provided, or the
SI♦WT must be provided to demonstrate that the permanent pool of the BMP is above the
SHWr and will not dewater the wetlands over time. Where possible, all BMP's and swales
should outlet into back the wetlend (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? We have requested the vlalt.
(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? E 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? —N/A
What is the permit number of the existing permitted facility? SW8 _ N/A
Is the permitted facility In compliance with Its permit? Yes No NIA
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 NIA
15, Do the plans reflect all information in 15A NCAC 21-1.1003 (g)? ® Yes ❑ No ❑ N/A
16. Will all of the design requirements for each proposed BMP be met? E Yes ❑ No ❑ N/A
(if not, attach a seporote 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.
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 detalls on the plans, and page 1 of the supplement.
RE C E I y E
U u APR 17 2008 D
PROJ M —DWQ

APR 15,2008 02:40P 9104585261 page 2

u4i i]i UU0 10;Jz J1U4J07401 nr la tAuE U�/Ob
lnhltratton l�estm
h0tiation testing was performed using a model 2800.Guelph Permeameter which is a constant -
head device. which operates oh the;Mariotte siphon principle and is referenced in ASTM D-5I26.
The permeameter is used to determine field saturated hydraulic conductivity in centimeters per
second for soil at a specified depth. This testing involves advancing a borehole to the desired
infiltration depth and iutrrxhu* wa at a constant head to determine the steady state flow rate
from which the hydraulic conductivity cau be calculated.
No specific depth for infiltration testing .was specified by the civil designer; however, testing was
performed approximately•24-inches above the seasonal high wager level estimate (39 inches
below the, existing ground: surface): The results of our permeameter testing are presented in Table
2.
RECONNENDATIONS
Based on -the: results of 'our. field ,testing and soil classifications at the test location, it is our
opinion that in order. to achieve the steady state flow rates obtained during our testing, the area of
infiltration 'gallery or other infiltration structure should be designed to introduce stormwater at.
approximately. 39 inches below the existingground surface elevation. If the stormwater is
introduced at a shallower depth the weakly cemented sands occurring' between 21 and 28 inches
below. grade should be removed and replaced with a clean sand meeting the grading
characteristies:o£ASTM C 33.
For purposes of sizing the structures. we recommend an ultimate application rate of 6.1 inches per
hoar.' These. recommendations should be reviewed by appropriate regulatory authorities before
.finalizing the details of any'civil design.
CLOSURE
Please find attached omr`field' data and a sketch showing the approximate test locations. If you
have any .questions afterreviewing this letter, 'please do not hesitate to contact us at your
convenience.
Sincerely,
R CS, PLC .
David L'.'Wlrmstead
Field Operations Manager,.
DLWiSDK/dlw.
Attuchmenf9 _.
Copy: Mr. Phial Tripp; P-E, Tripp Engineering, P.C.
Steven . ly, P.E. �......�.�...�
Senior 6n ' eler { o!i- CARa��y,
i f '�otES3/pN�9
SEAL
17638
NALi0
..
APR 15,2008 02:412 9104585261 page 3

U 14i 10/ LUUO lo: OL 7IU4000Lo1 Kf I
Table 1
Munsell Soil Classifications
Proposed Masonboro Family Medicine
Lot 1 Springer Eubank Subdivision
Wilmington, North Carolina
RF1'S Job No. 350-08
tIAUE 04/06
Loc
Soil Description '.'
Hue
Value,
Chroma
Depth
Comments
�J
1
Topsoil
0-3
'Gmy.fine to medium'SAND,
.7.5YR
6
I
3-8
trace radl9,
Pinkish Gtay fiiie.to medium
7.5YR
6
2
8-18
SAND, trace.r4olsr ,y
Piakish Gray fine to medium."
SAND
'7.5YR
7
2
18-21
Very Dart Bmwn fine to medium'.
7.5YR
2.5
2
21-28
Weakly
SAND trace of Silt
Cemented
While fine by maliuut SAND
`7.5YR
8
1
28-63
Slight
Mottling@
60"
Dark Brown Fine to medium
.7.5YR
1
3
63-106
SHWT/H2O
SAND, trace of Silt;.
1
1 @87"
APR 15,2008 02:41P
9104585261
page 4

U4I104UUO ]IU47bbLb1 KY IS etka. 05/ b
Table 2 .
Guelph Permeameter Test Results
Proposed Masonboro Family Medicine
Lot 1 Springer Eubank Subdivision
VVilinington, North Carolina.
RFTS lob No. 350-08
Location
1
Depth
in.
39
H
cra
5
Rr
crn/min
19.6
Ris
(cm/sec
0.3266
H2
cm
10
R2
cm/min
27.6
Res
. cm/sec
0.460
Ka
cm/sec
4.3lxIW
<Pm
cm/sec)
0.273
a cm
0.0157
Definition of Terms
R12 — Established 3 or more constant rate of water level change (crn/min)
Ris, ss — Calculated steady state flow rates (cm/sec)
HI,2 — Maintained Head of H2O (cm)
Kfs — Calculated field saturated bydniulic conductivity (cratsec)
Om — Matric flux potential (cm/sec)
a — Alpha parameter
Depth — Depth of well hole (in.)
Location — Test location identification number
Note: Diameter of well is 3.0 cm.
APR 15,2008 02:42P 9104585261 page 5

INFILTRATION AND SHWT ESTIMATE TEST LOCATION
PROPOSED MASONBORO FAMILY MEDICINE
m LOT 1 SPRINGER EUBANK SUBDIVISION
WILMINGTON, NORTH CAROLINA
Residential Foundation JOB NO. 350-08
ITestino Services. PLLC
EXXON STATION
FIGURE 1
DRAWING NOT TO SCALE
DATE: 414108
SKETCH: DLW
REVIEW: SDK
Legend
6 APPROXIMATE TEST LOCATION
Reamendal Fouridadon Testing Services,
1305 3A CaroMa Beach Ave N
Carofna Beach, North Carolha 2642E
Office: 910455-1377
Fax: [phone]

APR 17,2008 02:18P Tripp Engineering 9107635631 page 2
DIVISION OF WATER QUALITY
INFILTRATION SYSTEM INVESTIGATION
Complete and email this form to [e-mail]. If there are more than 7 areas to be tested,
attach a second sheet.
r'
Scheduled Site Visit Date: �`� Q Time: 2r'046
Project Name: MasOnboro Family Medicine County: New Hanover
Street Address: 6419 Carolina Beach Road
Directions from the nearest intersection of two major roads:
From the Intersection of US 421 and NC 1492, trave approx. 1.1 miles north on US 421.
Site is on right.
>1 acre being disturbed? ®YES 5NO CAMA Major required? []YES ®NO
Consultant Name: Charles Cazier Phone: [phone]
Consultant Firm Name: Trion Enaineedno
Bore Number
1
2
3
4
5
6
7
e Existing Ground Elevation
b Proposed Bottom Elevation
32.5
_
c Difference a minus b
d Add 2 ft. Min. Bore De&)_
_
e) Hardpan Depth?
Infiltration Rate OK?
6""r
A rox. Elev. Of SHWT
30.0
h Max. lowest bottom elev.
32.0
_
Comments 41-1 30J641 4), 1vvc _5'4lo1/7'
Required Attachments:
1. Legible vicinity map.
2. Complete Soils Report.
3. PDF formatted site plan with the boring locations to be tested. Site plans should
be emailed or hand -delivered only. Illegible faxed maps will not be accepted.
All proposed infiltration areas and existing, active utility lines located within the proposed
basWlrench must be marked and flagged. If these areas are not flagged, the Soils Scientist
reserves the right to decline to do the investigation. If tho proposed Inflltration system will be
located in an area of existing pavement and there is no open area nearby, equipment capable of
breaking through the irnpervfous layer must be provided. The soils investigation does not take
the place of a soils report prepared by an appropriate professional. The Soils Scientist will only
verify the soil conditions that are reported in the Soils Report, and make a determination as to
the suitability of the site to meet the infiltration design roquirements under NCAC 2H.1000, and
assumes no liability should the system fail.
S:\WQS\STORMWATER\FORMS\infiltration site visit.for Revised 8.07

m

APR 17,2008 02:181? Tripp Engineering 9107635631
U4/1W ZuUU 1J: t, yi U4 UbLbl RF is PAGE
r
S
✓,fir � a n.,,� i /�
• �- 1Snn1 d. 3tKIR a .»4 S j •.
ed at oft lotatiat to a acp t of apinmunuat ly 9 feet below the
Orea awn med to court ltle with the proposed infiltration
irate logged and viwally.class5ed by depth and a Munsell Soil
fg'lhei bue, value, and chrome of the visually distinct soil layers.
it" of intabedded clew fine to medium sands (USCS Soil
instinct zone of soil cementation between 21 And 28 inches
r'tuaparison of the soils to the MueselfChart suggests the
inditive of their occotring abovethe seasonal high water
oximately. 63 inches below the existing .ground surface. A
. auScring indicated a depth to standing water. in the borehole
_A �-- ,
office: aio-4%13n
FWC 910469-6281
page 4
02/06
APR 15,2008 02!40F 91U458521,1 page 2

APR 17,2008.02:19P Tripp Engineering
04/1V2008 13:52 9104585261
9107635631
RFTS
page 5
PAGE 03/06
George Alsina Architect
RFTS Job No. 35"S
Infiltration T
April 4, 2008
Page Two
Infiltration tasting was performedusing a model 2800 Guelph Permeameter which is a constant -
head device which operates Ott the Marlowe siphon principle and is referenced in ASTM D-5126,
The pcmteameter is used., to determine field saturated hydraulic conductivity in centimeters per
second for soil at a specified dcjrth.'This testing involves advancing a borehole to the desired
infiltration depth and introducing water at a constant head to determine the study state flow rate
from which the hydraulicconductivity can be calculated
No specific depth fur infiltration tirsting was spec fled by the civil designer, however, testing was
performed approximately 24 inches above the seasonal high water level estimate (39 inches
below the existing ground surface). The results of our permeameter testing are presented in Table
2.
RECOMMENDATIONS
Basedon the results of our field testing and soil classifications at the test location it is our
opinion that in order to whim the steady slate flow rates obtained daring our testing, the area of
infiltratiou gallery or other infiltration structure should be designed to introduce stormwater at
approximately 39 inches below the existing ground surface elevation. If the stonmwater is
introduced at a shallower depth, the weakly cemented sands occurring between 21 and 28 inches
below grade should' be removed and replaced with .a clean sand meeting the grading
characteristics of ASTM C-33.
For purposes of sizing the sbvahum we rccolumend an ultimate application rate of 6.1 inches per
hour. These recommendations should be reviewed by appropriate regulatory authorities bef.
finalizing the. details of any civil design. re
C7.OSl1RE
Mean find attached our field data and a sketch showing the approximate test locations. If you
have nY 9 lion+ reviewing this letter, pleaso do not hesitate to contact us at your
convenience.
Sincerely,
JRM, PLLC
David L. Winstead
Field Operations Manager .
DLw:SDK/dlw
Attachment '
Cory: Mr. Phil'tripp, Px., Tripp Engrg P.C.
APR 15,2008 02!11P
910958b261
Steven lly, P.E.
Senior En ' eer
SEAL
17638
DAL
nN}P 7

�trnnMF/,.f
� LIMITED LIABILITY COMPANY
a" r
ANNUAL REPORT
NAME OF LIMITED LIABILITY COMPANY: A & K of Wilmington, LLC
SECRETARY OF STA'IT R.L.L.P. 11)NUMBER: 0669996
NATURE OP BUSINESS: Rental Real Estate
IZEMISTEIZED AGENT: IBobre, Andrew
REGISTERED OFFICE MAILING ADDRESS: 6132-8 Carolina Beach Rd
Wilmington, NC 28412
n-r ueu tuattmt melon
-1-0-5628756
For year2006
Do not data enter manually.
STATE OF INCORPORATION: NC
REGIS'1'ERI?D OFFICE S'I'REIiT ADDIZESS: 6132-8 Carolina Beach Rd
Wilmington, NC 28412 New Hanover County
PRINCIPAL OhFICP.'I'ELEPHONI, NUMBER: [phone]
PRINCIPAL ORRICE MAILING ADDIZISS: 6132-8 Carolina Beach Rd
Wilmington, NC 28412
PRINCIPAL OFFICE STREl 1' ADDRESS: 6132-8 Carolina Beach Rd
Wilmington, NC 28412
MANAGERS/MEMBERS/ORGANIZERS:
,Arame: Kimberly J Wartin
Tille: Manager
Address:
6132-8 Carolina Beach Rd
Plihnineton. NC 28412
CERTIFICATION OF ANNUAL REPORT MUST BE COMPLETED 13Y ALL LIMITED LIABILITY COMPANIES
Kimberly Marlin
FORM MUSTI31? SIGNED 13Y A MANAGER/MEMBER
Kimberly Martin
04/09/2007
DATIE,
Manager
TYPE OR PRINT NAME TYPE OR PRINTTITLE
ANNUAL. REPORT FEE: $200 MAIL- TO: Secretary of State • Corporations Division • Post Office Box 29525 • Raleigh, NC 27626-0525