SW8040937_COMPLIANCE_20041118

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

�pF WATF9Q Michael F. Easley, Governor
�O G William G. Ross, Jr., Secretary
C0 7 North Carolina Department of Environment and Natural Resources
< Alan W. Klimek, P.E. Director
Division of Water Quality
November 18, 2004
Mr. Michael G. Tuton, Vice President
Hunter Development Corp.
PO Box 1066
Jacksonville, NC 28541
Subject: Stormwater Permit No. SW8 040937
Briar's Creek, Lots 6-10
High Density Project
Onslow County
Dear Mr. Tuton:
The Wilmington Regional Office received a complete Stormwater Management Permit
Application for Briar's Creek Lots 6-10 on November 12, 2004. Staff review of the plans and
specifications has determined that the prot1ect, as proposed, will comply with the Stormwater
Regulations set forth in Title 15A NCAC 2H.1000. We are forwarding Permit No. SW8 040937
dated November 18, 2004, for the construction of the subject project.
This permit.shall be effective from the date of issuance until November 18, 2014, and shall be
subject to the conditions and limitations as specified therein. Please pay special attention to
the Operation and Maintenance requirements in this permit. Failure to establish an adequate
system for operation and maintenance of the stormwater management system will result in
future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have
the right to request an adjudicatory hearing upon written request within thirty (30) days
following receipt of this permit. This request must be in the form of a written petition,
conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of
Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands
are made this permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please
contact Linda Lewis, or me at [phone].
Sincerely,
Rick Shiver
Regional Supervisor
Surface Water Protection Section
RSSlarl: S:1WQSISTORMWATIPERMIT1040937.nov04
CC' Tim Stewart, P.E., Parker & Associates
Onslow County Building Inspections
Linda Lewis
Wilmington Regional Office
Central Files'
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 One
NorthCarolina
An Equal Opportunity/Affirmative Action Employer— 50% Recycled/10% Post Consumer Paper Natu11,711Y

State Stormwater Management Systems
Permit No. SW8 040937
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
REDEVELOPMENT AND 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
Michael futon & Hunter Development Corp.
Briar's Creek Lots 6-10
Onslow County
FOR THE
redevelopment of existing built upon area, and the construction, operation and
maintenance of a sand filter in compliance with the provisions of 15A NCAC 2H .1000
(hereafter referred to as the "stormwater rules') and the approved stormwater
management plans and specifications and other supporting data as attached and on file
with and approved by the Division of Water Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until November 18, 2014, 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 1.5 on page 3 of this permit. The stormwater
control has been designed to handle the runoff from 9,656 square feet of
impervious area.
3. The existing built -upon area was 14,828 square feet. This runoff left the site
untreated via grassed swales and pipes. The built -upon area has been reduced
to 12,513 square feet, of which the runoff from 9,656 square feet is being treated
in a new sand filter. The runoff from the remaining 2,857 square feet is allowed
to sheet flow through 270 linear feet of grassed swale. The built -upon area on
the tract will be limited to a maximum of 12,513 square feet per the approved
plans.
4. The runoff from 9,656 square feet of built -upon area within the permitted
drainage area of this project must be directed into the permitted stormwater
control system.
Page 2 of 7

0
State Stormwater Management Systems
Permit No. SW8 040937
5. The following design criteria have been provided in the sand filter and must be
maintained at design condition:
a.
Drainage Area, acres:
0.243
Onsite, ft :
10,602
Offsite, ft2:
0
b.
Total Impervious Surfaces, ft2:
9,656
c.
Design Storm, inches:
1
d.
TSS removal efficiency:
85%
e.
Receiving Stream/River Basin`.
Northeast Creek
/ White Oak
f.
Stream Index Number:
WOK02 19-16-(0.5)
g.
Classification of Water Body:
"SC NSW"
Sand
Sediment
Chamber
Chamber
h.
Chamber Depth, inches:
18
12
i.
Top of Sand Elevation, FMSL:
34.3
n/a
j.
Surface Area, ft2:
270
270
k.
Bottom elevation, FMSL:
32.8
33.5
I.
Storage Volume, ft3:
304
180
M.
Weir Overflow Elevation, FMSL:
34.5
34.5
n. Controlling Orifice:
II. SCHEDULE OF COMPLIANCE
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. Quarterly scheduled inspections (every 3 months).
b. Sediment removal.
C. Maintenance of all slopes in accordance with approved plans and
specifications.
d. Debris removal and unclogging of sand filter, orifice device, catch basins
and piping. Dewatering and replacement of sand.
e. Access to the sand filter must be available at all times.
Page 3 of 7

State Stormwater Management Systems
Permit No. SW8 040937
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 040937
III. GENERAL CONDITIONS
This permit is not transferable to any person or entity 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 18th day of November 2004.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 5of7

State Stormwater Management Systems
Permit No. SW8 040937
Briar's Creek Lots 6-10
Stormwater Permit No. SW8 040937
Onslow County
Designer's Certification
I, , as a duly registered in the
State of North Carolina, having been authorized to observe (periodically/ weekly/ full
time) the construction of the project,
(Project)
for (Project Owner) hereby state that, to the
best of my abilities, due care and diligence was used in the observation of the project
construction such that the construction was observed to be built within substantial
compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
SEAL
Page 6 of 7

State Stormwater Management Systems
Permit No. SW8 040937
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 of the built -upon area within the permitted drainage area of this system
is graded such that the runoff drains to the system.
4. All roof drains are located such that the runoff from that portion of the
buildings shown on the approved plan is directed into the system.
5. The sand filter elevations are per the approved plan.
6. The sand filter is located per the approved plans.
7. The permitted amounts of surface area and volume have been provided.
8. Required drawdown devices are correctly sized and located per the
approved plans.
9. All required design depths are provided.
10. All required parts of the system are provided, such as a sediment
chamber and a sand chamber.
11. The required system dimensions are provided per the approved plans.
cc: NCDENR-DWQ Regional Office
Onslow County Building Inspections
Page 7 of 7

'�;..}. 'N: Y'�`d??`�« j�i.'•!;'f ;. ,., t .- �.AJ"ry " k V�YJ �W1,�7i.., _?%!'1a x.e.4 ';�5 �. ­ g.;A�..�•. 7'�Yr. ...1. �".�k�ih`�.
�Rk
Date Received
Fee Paid
Permit Number
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):
HUNTER DEVELOPMENT CORP.
2. Print Owner/Signing Official's name and title (person legally responsible for facility and compliance):
MICHAEL G. TUTON, VICE PRESIDENT
3. Mailing Address for person listed in item 2 above:
P.O. Box 1066
City: Jacksonville State: NC Zip: 28541
Telephone Number: ( 910 ) 577-1441
4. Project Name (subdivision, facility, or establishment name -should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
BRIAR'S CREEK, LOTS 6-10
5. Location of Project (street address):
CORBIN STREET
City: JACKSONVILLE County: ONSLOW
6. Directions to project (from nearest major intersection):
From NC 24 & US 17 take 24 East approximately 3.75 miles to Corbin Street. Turn left onto Corbin
street. Project is on the iett approximately s mnes.
N 340 44' 39" W 770 21' 43"
7. Latitude: Longitude: of project
8. Contact person who can nswer quegtjons about the project: 910 455-2414
Jason A. nousto ,
Name: Telephone Number: (_ )
II. PERMIT INFORMATION:
1. Specify whether project is (check one): X New Renewal Modification
Form SWU-101 Version 3.99 Page 1 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 X Redevelop General Permit Other
4. Additional Project Requirements (check applicable blanks):
.CAMA Major Sedimentation/Erosion Control _404/401 Permit . _NPDES Stormwater
Information on required state permits can be obtained by contacting the Customer Service Center at
1-877-623-6748.
III. PROJECT INFORMATION
1. In the space providedbelow, summarize how stormwater will be treated. Also attach a detailed narrative
(one to two pages) describing stormwater management for the project.
Sand Filter & Swale
2. Stormwater runoff from this project drains to the White Oak
River basin.
3. Total Project Area: .4$ acres 4. Project Built Upon Area: 59 %
5. How many drainage areas does the project have? 2
6. 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.
5AIjd FIL.TEk
6k4SSED :S ALE
Basinainforination
/�{}
'k ita e �reayl�`G°
�6'�.•.., �`�!,t.'�9�f'?�41GSn4+:.ih�
Q
1pr eArea
Receiving Stream Name
Northeast Creek
Northeast Creek
Receiving Stream Class
SC NSW
QNSW
Drainage Area
10-R02 SE
10,420 SE
Existing Impervious* Area
0
0
Proposed Impervious*Area
9656 SF
2857
% Impervious` Area (total)
91 %
27%
s Fes, M
I[nperviauS SurfaCe:Aie� a
. �s...� Y.. .i
- + r#ti agearea
.,ma's a.,. 'ai`3.r a, .a.�
P F, ,,
r ix1 .�►rete,�2 `
On -site Buildings
2,987 SF
2,257 SF
On -site Streets
0
0
On -site Parking
6,333 SF
0
On -site Sidewalks
0
600 SF
Other on -site
336 SF
0
Off -site
0
0
Total: 9,656 SF
Total: 2, 867 SF
Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Form SWU-101 Version 3.99 Page 2 of 4

7. How was the off -site impervious area listed above derived?
IV. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
The following italicized 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.
1. The following covenants are intended to ensure ongoing compliance with.state stormwater management permit number
as issued by the Division of Water Quality. These covenants may not be
changed or deleted without the consent of the State.
2. No more than square feet of any lot shall be covered by structures or impervious materials,
Impervious materials include asphalt, gravel, concrete, brick, stone, slate or similar material but do not include wood
decking or the water surface of swimming pools.
3. Swales shall not be filled in, piped, or altered except as necessary to provide driveway crossings.
4.. Built -upon area in excess of the permitted amount requires a state stormwater management permit modification prior to
construction,
5. All permitted runoff from outparcels or future development shall be directed into the permitted stormwater control
system. These connections to the stormwater control system shall be performed in a manner that maintains the integrity
and performance of the system as permitted.
By your signature below, you certify that the recorded deed restrictions and protective covenants for this project
shall include all the applicable items required above, that the covenants will be binding on all parties and persons
claiming under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the State, and that they will be recorded prior to the sale of any lot.
V. SUPPLEMENT FORMS
The applicable state stormwater management permit supplement form(s) listed below must be submitted for each
BMP specified for this project. Contact the Stormwater and General Permits Unit at [phone] for the status
and availability of these forms.
Form SWU-102
Wet Detention Basin Supplement
Form SWU-103
Infiltration Basin Supplement
Form SWU-104
Low Density Supplement
Form SWU-105
Curb Outlet System Supplement
Form SWU-106
Off -Site System Supplement
Form SWU-107
Underground Infiltration Trench Supplement
Form SWU-108
Neuse River Basin Supplement
Form SWU-109
Innovative Best Management Practice Supplement
Form SWU-101 Version 3.99 Page 3 of 4

VI. SUBMITTAL REQUIREMENTST
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 Regional Office.
PIease indicate that you have provided the following required information by initialing in the space provided
next to each item.
• Original and one copy of the Stormwater Management Permit Application Form
• One copy of the applicable Supplement Form(s) for each BMP
• Permit application processing fee of $420 (payable to NCDENR)
• Detailed narrative description of stormwater treatment/management
• Two copies of plans and specifications, 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, finished floor elevations
Details of roads, drainage features, collection systems, and stormwater control measures
Wetlands delineated, or a note on plans that none exist
Existing drainage (including off -site), drainage easements, pipe sizes, runoff calculations
Drainage areas delineated
Vegetated buffers (where required)
VII. AGENT AUTHORIZATION
If you wish to designate authority to another individual or firm so that they may provide information on your
behalf, please complete this section.
Designated agent (individual or firm): PARKER & ASSOCIATES, INC.
Mailing Address: P.O. BOX 976
City: JACKSONVILLE { State: NC Zip; 28541
Phone: ( 910 ) 455 - 2414 Fax: C - 910 ) 455 - 3441
VIII. APPLICANT'S CERTIFICATION
I, (print or type name of person listed in General Information, item 2) 1-11 Gh a
certify that the information included on this permit application form is, to the best of my knowledge, correct and
that the project will be constructed in conformance with the approved plans, that the required deed restrictions
and protective covenants will be recorded, and that the proposed project complies with the requirements of 15A
NCAC 2H .1000,
Signature:
Form SWU-101 Version 3.99 Page 4 of 4
Date: /0 Zo-0

State Storrriwater Permif-Nd:--�--,)C.C-= % -
Applies to System No. I
SAND FILTER OPERATION AND MAINTENANCE PLAN
Regular maintenance is essential to the long-term performance and durability of the
sandfilter, as it is with all stormwater BMP's.
1 . Depending on the types of activities occurring within the drainage area, most sand
filters will show a decreased capacity for filtration after a few years. At least once a
year, each filter must be inspected after a 1" design storm event to determine if the
filter bed is passing the runoff within 24 hours.
2. If the filter is not passing the runoff completely within 24 hours, the first 2"-3" of
discolored sand must be removed and replaced with new sand. The removed sand
must be dewatered and disposed of properly.
3. At the same time that maintenance is performed on the sand chamber, the sediment
chamber should be pumped and cleaned. The removed sediment should be
dewatered and disposed of properly.
4. At least once every quarter, check that the orifice is clear.
I acknowledge and agree by my signature below that I am responsible for the performance
of the maintenance procedures listed above. I agree to notify DWQ of any problems with
the system and prior to any changes to the system or the responsible party.
Print name and title Michael G. Tuton, Vice President
Address PO BOX 1066 Jacksonville, NC 28541
Phone:
Signature
910 577-1441 Fax: [phone]
—J=hi4,'­X r_ Date I I z 2 22::(L
(Vote: The legally responsible party should not be a homeowners association unless more than 50% of the
lots have been sold and a resident of the subdivision has been named the president.
I, 61endn rJ. Kit- 4a f_ ► cic
, a Notary Public for. the State of .
_
Noc4h cc"(_011`h01, County of Qn
f,,1 oc� D do hereby
certify that _Z 7,`c hoe,/ G, -r�fov-)
personally appeared before me
this the ly) day of Alo ✓emb,-_r
az oo tl , and acknowledge the due
execution of the foregoing sand filter maintenance requirements. Witness my hand and
officialseal,
'
r� �--�
`1 tJ^i-.• J J '1;'j a�,0,9i'
ti
My commission expires a v2-I ,70C)&
,N
Q=I:
RECEIVED
NOV 12 2004
DwQ
PROD # Sl•ti 0 4v�1

SAND FILTER DESIGN
FILENAME: G:IDATAIWPDATAIWQSISFILTER1040937.WK1
DATE: 03-Nov-04 PROJECT# SW8 040937
PROJECT NAME: Briar's Creek Townhonnes
DRAINAGE BASIN: White Oak River REVIEWER: L. Lewis
RECEIVING STREAM: Northeast Creek CLASS: SC NSW
Index No.: WOK02 19-16-(0.5) If ORW, is site within the 575' AEC?
f
SITE AREA: 0.48 acres DRAINAGE AREA: >I`0 02 SF
IMPERVIOUS AREA CALCULATION
BUILDINGS
PARKINGIWALKS
CONCRETE
OTHER
% IMPERVIOUS, 1=
BOTTOM OF FILTER
TOP OF SAND
OVERFLOW WEIR
SURFACE AREA
VOLUME
REQUIRED SURFACE AREA
FILTER WIDTH PROVIDED
FILTER LENGTH PROVIDED
PROVIDED SURFACE AREA
5244 SQUARE FEET
6333 SQUARE FEET
600 SQUARE FEET
336 SQUARE FEET
TOTAL ;., ., .1;i,; SQUARE FEET
RV= .05+.009 (I ) = 0
Sediment Chamber
FEET MSL
FEET MSL
FEET MSL
Sand Chamber
SF $7;6; SF
FEET `3 FEET
FEET 9f3 FEET
SF 270. SF
REQUIRED MIN. VOLUME 13I 43t CF 131:, CF
TOTAL VOLUME REQUIRED _..5',86: CF
Sediment Chamber Sand Chamber
X-Sectional Area
VOLUME <; ::1$4 CF 303<75' CF
TOTAL VOLUME PROVIDED 48.3:75 CF
ORIFICE DESIGN
PROPOSED ORIFICE DIAMETER
AVERAGE HEAD
NUMBER OF ORIFICES
FLOWRATE FOR 24 HOURS
FLOWRATE PROVIDED
INCHES
FEET
EACH
CFS
CFS
COMMENTS
Volume, surface area and drawdown are (not) within Design Requirements.

.r
PARKER & ASSOCIATES, INC.
5rapitig Hor;zoh$
Consulting Engineers - Land Surveyors - Land Planners
306 New Bridge Street + P.O. Box 976
Jacksonville, NC 28541-0976
[phone] + Fax: [phone] ::;'•::'::
RECEIVED
Nov 0 2 2004
WQ 0�37
PROM # `�
Sand Filter
Design Calculations
For
Briars Creek Lots 6-10
1. Sediment Chamber Design Criteria.
`��+4nsrtirra•q,�
.•''�°•••'`'ssi'`••.yq''•-
f 04� 1
' SEAL
14'5 75
t4 `•
•. �� NE ..• P *�
tir M. [Z�
•�"131111f111 1t�'�
Volume of Sediment Chamber must equal or exceed 540 cubic feet per acre of
drainage. Surface area of Sediment Chamber must equal or exceed 360 square feet per
acre of drainage.
A. Sediment Chamber Volume Design Calculation
Drainage Area to Sand Filter = 10,602 SF / 43,560 SF / Acre = 0.243 Acres
0.243 Acres * 540 CF / Acre = 131.22 CF Required Volume
B. Sediment Chamber Volume Design Dimensions
Length = 90.0 ft. BY:
2 ft 1 ft
lft
ENVIRONMENTAL ENGINEERING + STORM WATER MANAGEMENT + WATER AND WASTEWATER SYSTEMS
DEVELOPMENT CONSULTING + FEASIBILITY REPORTS + COMPUTER AIDED DESIGN + CONSTRUCTION PLANS

F]
Cross Sectional Area = (I ft. * 1 ft.) + (2 ft. * 1 ft. * 0.5ft.)
1.0 SF + LOSF
2 SF
Design Volume = 90 ft. * 2 SF = 180 CF
Design Volume > Required Volume
180 CF > 131.22 CF OK
C. Sediment Chamber Surface Area Design Calculations
Drainage Area to Sand Filter = 10,602 SF / 43,560 SF / Acre = 0.243 Acres
0.243 Acres * 360 SF/Acre = 87.48 SF Surface Area Required
D. Sediment Chamber Surface Area Design Dimensions
Surface Area = (Length * Width) = (90 ft * 3 ft) = 270 SF
Design Area > Required Area
270 SF > 87.48 SF OK
2. Sand Chamber Design
Volume of sand chamber must equal or exceed 540 cubic feet of volume per acre of
drainage area. Surface area of sand chamber must equal or exceed 360 square feet of
surface area per acre of drainage area.
A. Sand Chamber Volume Design Calculations
Drainage Area to Sand Filter = 10,602 SF / 43,560 SF 1 Acre = 0.243 Acres
0.243 Acres * 540 CF = 131.22 CF Required Volume
B. Sand Chamber Volume Design Dimensions
Length = 90 ft. BY 3ft
1.5ft
0.75ft 1.5ft 0.75ft

3
Cross Sectional Area = (1.5 ft * 1.5 ft) + 2*(1.5 ft * 0.75 ft * 0.5ft)
2.25 SF + 1.125 SF
3.375 SF
Design Volume — 3.375 SF * 90 ft = 303.75 CF
Design Volume > Required Volume
303.75 CF > 131.22 CF OK
C. Sand Chamber Surface Area Design Calculations
Drainage Area to Sand Filter = 10,602 SF / 43,560 SF / Acre = 0.243 Acres
0.243Acres * 360 SF/Acre = 87.48 SF Surface Area Required
D. Sediment Chamber Surface Area Design Dimensions
Surface Area = (Length * Width) = (90 ft * 3 ft) = 270 SF
Actual Design > Minimum Design Calculations
270 SF > 87.48 SF OK
c l .JAH. Bri ars.Creek.calcs. l 018

PARKER & ASSOCIATES, INC.
Consulting Engineers - Land Surveyors - Land Planners
306 New Bridge Street + P.O. Box 976
Jacksonville, NC 28541-0976
[phone] + Fax: [phone]
i I ED
i
OCT 2 6 2004
f
Sand Filter
Design Calculations
For
Briars Creek Lots 6-10
1. Sediment Chamber Desiizn Criteria.
Shaping Horixo g
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Volume of Sediment Chamber must equal or exceed 540 cubic feet per acre of
drainage. Surface area of Sediment Chamber must equal or exceed 360 square feet per
acre of drainage.
A. Sediment Chamber Volume Design Calculation
Drainage Area to Sand Filter = 10,602 SF / 43,560 SF / Acre = 0.243 Acres
0.243 Acres * 540 CF 1 Acre = 131.22 CF Required Volume
B. Sediment Chamber Volume Design Dimensions
Length = 90.0 ft. BY:
2 ft 1 ft
lft
ENVIRONMENTAL ENGINEERING + STORM WATER MANAGEMENT + WATER AND WASTEWATER SYSTEMS
DEVELOPMENT CONSULTING + FEASIBILITY REPORTS + COMPUTER AIDED DESIGN + CONSTRUCTION PLANS

,J
2
Cross Sectional Area = (lft. * 1 ft.) + (2 ft. * 1 ft. * 0.5ft.)
1.0 SF + LOSF
2 SF
Design Volume = 90 ft. * 2 SF = 180 CF
Design Volume > Required Volume
180 CF > 131.22 CF OK
C. Sediment Chamber Surface Area Design Calculations
Drainage Area to Sand Filter = 10,602 SF / 43,560 SF 1 Acre = 0.243 Acres
0.243 Acres * 360 SF/Acre = 87.48 SF Surface Area Required
D. Sediment Chamber Surface Area Design Dimensions
Surface Area = (Length * Width) = (90 ft * 3 ft) = 270 SF
Design Area > Required Area
270 SF > 87.48 SF OK
2. Sand Chamber Design
Volume of sand chamber must equal or exceed 540 cubic feet of volume per acre of
drainage area. Surface area of sand chamber must equal or exceed 360 square feet of
surface area per acre of drainage area.
A. Sand Chamber Volume Design Calculations
Drainage Area to Sand Filter = 10,602 SF / 43,560 SF / Acre = 0.243 Acres
0.243 Acres * 540 CF = 131.22 CF Required Volume
B. Sand Chamber Volume Design Dimensions
Length = 90 ft. BY aft
P.
0.75ft 1.5ft 0.75ft
1.5ft

3
Cross Sectional Area = (1.5 ft * 1.5 ft) + 2*(1.5 ft * 0.75 ft * 0.5ft)
2.25 SF + 1.125 SF
3.375 SF
Design Volume = 3.375 SF * 90 ft = 303.75 CF
Design Volume > Required Volume
303.75 CF > 131.22 CF OK
C. Sand Chamber Surface Area Design Calculations
Drainage Area to Sand Filter = 10,602 SF 143,560 SF 1 Acre = 0.243 Acres
0.243Acres * 360 SF/Acre = 87.48 SF Surface Area Required
D. Sediment Chamber Surface Area Design Dimensions
Surface Area = (Length * Width) _ (90 ft * 3 fl) = 270 SF
Actual Design > Minimum Design Calculations
270 SF > 87.48 SF OK
c 1.JA H. Briars.Creek.calcs.1018