SW8020928_COMPLIANCE_20030124

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
❑CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
COMPLIANCE EVALUATION INSPECTION
DOC DATE
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STORMWATER CALCULATIONS
FIRST CHRISTIAN CHURCH
RICHLANDS, NC
Onslow County, North Carolina
Project #2022-001 (40)
RECEIVED
JAN 0 9 2003
DWQ
PRO # 5 6
Prepared by:
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243 North Front Street
Wilmington, North Carolina 28401
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�NICIQM&CREED
January 7, 2003
Mrs. Linda Lewis
NCDENR Division of Water Quality
127 Cardinal Drive Ext.
Wilmington, NC 28405-3845
M & C 02022-001(10)
JAN 0 -9 2003 4
U
Re: First Christian Church
Request for Additional Information
Dear Mrs. Lewis:
Enclosed is the additional information with regard to the stormwater package for the First
Christian Church which is located at the intersection of US 258 and Trott Road in Richlands, NC.
Regarding your comments, below is an explanation of the changes:
l . The detail sheet and calculations have been sealed
2. Full size (24" x 36") plans have been submitted
3. Page three of the supplement is altered based on your comments
4. A vicinity map is added
5. The type of wetland species is placed in the detail
If you have any further questions, please call at 910-343-1048.
Sincerely,
McKim & Creed, P. A.
Tim Clinkscales, El
Enclosures: Request for Additional Information
Submittal package
Pc: John Williams, PE, McKim & Creed
Michelle Ginocchio, MAG
File
243 N. FRONT ST., WILMINGTON, NORTH CAROLINA 28401
TEL [phone] FAX 910.251,8282 www.mckimcreed.com
AA0002667

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RECEIVED
(:�Jl/1fGLG9t/lI7.P/fb�lL� G"!}?i�C�L�liIZCS
Ae Cl� j66 252-2 DEC 17 '2002
9Vdm,V&an, ✓ WA %"'.a 28402
910-45 mil• ,2-0009 DWG
PROd # SGU �YO?Aq Z e
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93-" AID 91-k
8805 %�ia(ovclla 'Z4' aue
%D ion W 23403
July 24, 2001
Marie Arcuri
McKim & Creed
234 N. Front Street
Wilmington, NC 28401
Re: 404 Wetlands delineation for the First Christian Church in Richlands, Onslow
County.
Dear Marie,
On July 23, 1999, Land Management Group, Inc made a site visit to the above mentioned property
for the purposes of 404 wetlands delineation. Wetlands were flagged using the U.S. Army Corps of
Engineers (C.O.E.) Wetlands Manual -1987 edition. Wetlands were Tiagged using a u"Yee parameter
approach incorporating soils, vegetation, and hydrological indicators.
Jurisdiction 404 Wetlands and Waters of the United States as regulated by the U.S. C.O.E. were
observed on the subject property, see attached map. These wetlands were delineated in the field in
pink/black striped ribbon. Because it was raining at the time of the delineation, the flags were not
numbered. The flags along both the southern and eastern property line were placed along the top of
the ditch bank. Access was gained to the eastern property line ditch from existing cut lines.
The wetlands ribbons should be located on a boundary survey. When the completed survey is
supplied to our office, we will submit the survey along with supporting documentation to the C.O.E.
for approval and signature. After the survey is signed by the C.O.E., wetlands documentation on the
above referenced property will be complete.
Thank you for the opportunity to serve you in this matter. If you have further questions, please
contact me.
Respectfully,
Tom Gulley

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Michael F. Easley, Governor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
Wilmington Regional Office
December 5, 2002 _ -- -- -- -- -
Mr. Thomas H. Barbee, Trustee
First Christian Church
PO Box 425
Richlands, NC 28574
Subject: REQUEST FORADDITIONAL INFORMATION'
Stormwater Project No. SW8 020928
First Christian Church
On slow County
Dear Mr. Barbee:
The Wilmington Regional Office received a Stormwater Management Permit Application
for First Christian Church on September 23, 2002. 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 either delineate all wetlands on site, disturbed or undisturbed, or note on
the plans that none exist.
2. Please specify pond side slope vegetation and the wetland species to be planted on
the 6:1 shelf.
3. Please add a vicinity map to the plans which includes the nearest intersection of
two major roads. A major road is any 1, 2 or 3 digit NC, US or interstate highway.
4. Please provide the Stage -Storage calculations referred to in the calculations or
provide a table of elevations, areas and volumes to support the conclusions that
sufficient volume has been provided in the pond and forebay.
5. Please initial items e, i and m on page 2 of the supplement and provide the
cleanout diagram on page 3 of the supplement.
I"A
RMENR
N.C. Division of Water Quality 127 Cardinal Drive Extension Wilmington, N.C. 28405 [phone] Fax [phone] Customer Service
800-623-7748

Mr. Barbee -
December 5, 2002
Stormwater Project No. SW8 020928
---------------------------------------------------
Please note that this request for additional information is in response to a preliminary
- review. The.requested information should be -received -by this Office prior to January 5, 2003, 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 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.
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].
Sincerely, -
Linda Lewis
Environmental Engineer
RSS/arl: S:1WQSISTORMWATIA.DDINFO120021020928.DEC
cc: Linda Lewis
Greg Hetzler, P.E.

OZvy Zd'
Footnotes:
When using the Division SAIDA tables, the correct SA/DA ratio for pennanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth. Linear interpolation should be employed to deternune the correct value for non-
standard table entries.
In the 20 coastal counties, the requirement for a vegetative filter may be waived if the wet detention basin is designed to provide
90% TSS removal. The NCDENR $MP manual provides design tables for both 85% TSS removal and 90% TSS removal.
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H .1008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stonnwater Management Permit
Application Form, the -agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
-�� ✓ a. The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
c ✓ b. The forebay volume is approximately equal to 20% of the basin volume.
.�� ✓ c. The temporary pool controls runoff from the design storm event.
Tt,c ✓ d. The temporary pool draws down in 2 to 5 days.
s_ �e3 If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
TLC' f. The basin length to width ratio is greater than 3:1.
Gam`
Pump 0m
The basin side slopes above the permanent pool are no steeper than 3:1.
A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
Vegetative cover above the permanent pool elevation is specified.
A trash rack or similar device is provided for both the overflow and orifice.
A recorded drainage easement is provided for each basin including access to nearest right-
of-way.
If the basin is used for sediment and erosion control during construction, clean out of the
basin is specified prior to use as a wet detention basin.
A mechanism is specified which will drain the basin for maintenance or an emergency.
III. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the
vegetated filter if one is provided.
This system (check one) 0 does
This system (check one) 0 does
v0 does not
v0 does not
incorporate a vegetated filter at the outlet.
incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of 4

Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs
within 2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed
of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality
(i.e. stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
When the permanent pool depth reads feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads feet in the forebay, the sediment shall be removed.
rPUT�
SIN DIAGRAM
ll in the blanks)
GRAM HERE N r
FOREBAY
MAIN POND
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minimized to the maximum extent practical.
Form SWU-102 Rev 3.99 Page 3 of 4

DETENTION POND ANALYSIS FILENAME- G:IDATAIWPDATAIWQSIPOND1020928.WK1
PROJECT #: SW8 020928 REVIEWER: L. Lewis
PROJECT NAME: First Christian Church
DATE: 05-Dec-02
Receiving Strearn: New River Class: C NSW
Drainage Basin: White Oak Index No. WOK02 19-(1)
Site Area 9.47 acres
Drainage Area - 41513,; square feet Area = 9.47 acres
IMPERVIOUS AREAS
Rational C
Building 14400.00 square feet
Parking 87900.00 square feet
SW 2250.00 square feet
square feet
square feet
square feet
TOTAL 1ti450 Qb'': square feet Rational Cc= 0.15
SURFACE AREA CALCULATION
IMPERVIOUS
25.34%
SA/DA Ratio
2.28%
Des. Depth
4
Req. SA
9410 sf
TSS:
90
Prov. SA
<<>:<t<:18<13' sf
VOLUME CALCULATION
Rational ?*
Des. Storm
:....:...::...:..:...: f.:C>,
inches
Rv=
0.28
Bottom
58 msl
Perm. Pool
62.04< msl
_..
Design Pool
63 msl
Design SA
15781 sf
Req. Volume
96'°
cf
Prov. Volume
»>:137.9:7i
cf
ORIFICE CALCULATION
Avg. Head =
Flow Q2, cfs
Flow Q5, cfs
No. of Orifices
Diameter, inches
Drawdown =
* place a "1" in the box if Rational is used
FOREBAY
Perm. Pool Volume= 25744
Req. Forebay Volume= 5148.8
Provided Volume= 4788.00
Percent= $6°
SA @ _
Elevation=
COMMENTS
Surface Area , Volume and Orifice are within Design Guideline:
in
2.42 sq. in.
0.97 sq. in.
1.77 sq. in.
0.040 cfs
x FTM
n

DESIGN NARRATIVE
AND
EROSION CONTROL SPECIFICATION
FIRST CHRISTIAN CHURCH
RICHLANDS, NC
Onslow County, North Carolina
Project #2022-001 (40)
Prepared for:
First Christian Church
September 2002
Project ##2022-0001 (40)
Prepared by:
RECEIVED
SEP 2 3 2002
DWQ
PROD # ��6Zo92S
v MCKIM&=D
243 North Front Street
Wilmington, North Carolina 28401
[phone]
7v

FIRST CHRISTIAN CHURCH
RICHLANDS, NC
Onslow County, North Carolina
Project #2022-001 (40)
Table of Contents
Page
DesignNarrative.................................................................................................. .....................
Proposed Improvements 1 Erosion Control............................................................................... 1
Maintenance................................................................................ .... 2
.........................................
Erosion & Sedimentation Control Specification......................................................................... 3
Wet Detention Pond Calculations — NC DENR Erosion Control Requirements .........................7
DrainageBasin Map.................................................................................................................. 9
Storm Water Piping and Swale Calculations...........................................................................11
BMP Treatment Calculations............................................................ ....... 13
...............................
Wet Detention Pond Calculations — NC DENR SAIDA Ratio for TSS Removal ....................... 17
Onslow County SCS Soils Information....................................................................................19
Engineering Site Plans - Survey, C102................................................................................... 21
S:1202210001120 Tech1EROSJON DESIGN NARRATIVE.doc
Page i

FIRST CHRISTIAN CHURCH
RICHLANDS, NC
Onslow County, North Carolina
Project #2022-001 (40)
Design Narrative
First Christian Church is proposing the construction of a new sanctuary and parking area. The
site contains approximately 9.47 acres of open property with woods and a creek along three of
its property lines. The site is located at the intersection of US 2581NC 24 and Trott Road (SR
1383).
Areas to the south and east are woods and open space with a creek or waterway separating
the properties. To the north, are residential homes with open and wooded lots. The area to the
north is sloped toward the site. An existing Swale is located on the site to collect runoff from
adjacent properties.
The soil survey of Onslow County indicated the soils are Craven. The proposed stormwater
pond is located in Craven Soil (Soil Type C). Wetlands are not located in the disturbed area
including the outfall of the detention pond. The project is within the drainage basin that drains
to the White Oak River Basin
Land Management Group (LMG) of Wilmington NC conducted a site investigation for the
purpose of reviewing any potential impact to wetland areas. LMG's has reported wetlands were
not evidenced. The site was generally determined to have well-defined plow zone strata,
indicative of recent agricultural activities, overlying well drained light tan Sandy Loam soils.
Proposed Improvements I Erosion Control
The proposed site clearing and grading limits will be 3.3 acres,
Silt fence will be placed along the north and east side of the parking area, and around all
proposed storm inlets in order to combat soil migration during construction. The maximum
graded slope will not exceed three to one (3:1) and vegetative establishment will be a priority.
Also a Swale is to be placed along the northern end to convey runoff from the adjacent
properties.
Storm water runoff from the proposed site will be conveyed to a detention pond, via overland
flow, grassed swaies and storm water piping. The storm drain piping system has been designed
to accommodate runoff from a 10-year storm event. During construction the detention pond will
be used as a sediment basin, the required 8000 cubic feet of sediment storage (1800 cf per
disturbed acre) is provided at elevation 60.0 of the pond. The pond is to be cleaned of all
accumulated sediment once the site has been stabilized.
The treatment pond has designed in accordance with NCDENR Best Management Practices
(BMP). The pond's designed length to width ratio is approximately 3:1, and includes a fore -bay
volume of 20% of the basin's overall volume. Pond side slopes are 3H to IV, with 6H to 1V
planted littoral shelf. The littoral shelf is provided just below the control water surface elevation.
The permanent pool depth is 4 feet. The pond will detain the 1" rainfall volume from the projects
S:1202210001= Tech1EROSION DESIGN NARRATIVE.doc Page 1

drainage basins. The V rainfall volume will draw down through a 2" orifice in 3.3 days. Storm
water in excess of the 1" rainfall volume will overflow the pond's riser structure and discharge to
the outfall waterway. Supporting drainage calculations, drainage basin and pond information
are provided within the following pages of this report.
Maintenance
Contractors shall be responsible for periodic inspection and maintenance of all indicated
erosion control devices. In addition, inspection and any necessary maintenance will be required
immediately following any significant storm event. Any measure that fails to function as
intended shall be repaired immediately. Upon completion of construction and the establishment
of stabilizing ground cover, the property owner shall be responsible for site maintenance.
SA202210001120 TecMEROSION DESIGN NARRATIVE.doc Page 2

EROSION & SEDIMENTATION CONTROL SPECIFICATION
PART 1 - GENERAL
1.1 RELATED DOCUMENT
I
A. Drawings and general provisions of the Contract, including General and
Supplementary Conditions and Division 1 Specification Sections, apply to this Section.
( 1.2 WORK INCLUDED
A. Contractor shall take every reasonable precaution throughout construction to prevent
the erosion of soil and the sedimentation of streams, lakes, reservoirs, other water
impoundments, ground surfaces, or other property as required by State and Local
regulations.
Contractor shall, upon suspension or completion of land -disturbing activities, provide
protection covering for disturbed areas. Permanent vegetation shall be established at
the earliest practicable time. Temporary and permanent erosion control measures shall
be coordinated to assure economical, effective, and continuous erosion and siltation
control throughout the construction and post construction period.
1.3 RELATEDSECTIONS
I
A. Related 'Sections - The following Sections contain requirements that relate to this
Section:
i . 01011 - Existing Underground Utilities
2. 01 b 15 - Special Conditions for this Contract
3. 01070 -Shop Drawings, Project Data & Samples
4. 02200 - Earthwork, Excavation Trenching, and Backfilling
5. 02230 - Site Clearing
6. 02240 - Dewatering
7. 02485 - Seeding General Areas
1.4 REGULATORY REQUIREMENTS
A. Contractor shall be responsible for prevention of damage to properties outside the
construction limits from siltation due to construction of the project. The Contractor will
assume all responsibilities to the affected property owners for correction of damages
that mays occur. Erosion control measures shall be performed by the Contractor,
conforming to the requirements of, and in accordance with plans approved by
applicable state and local agencies and as per the erosion control portion of the
construction drawings and these specifications. The Contractor shall not allow mud and
debris to accumulate in the streets. Should the Contractor pump water from trenches
during construction, appropriate siltation preventative measures shall be taken prior to
discharge of pumped water into any storm drain or stream.
PART 2 - PRODUCTS
2.1 Open mesh biodegradable mulching cloth.
2.2 Fertilizer shall be 10-10-10 grade or equivalent.
S:1202210001120 Tech1EROSION DESIGN NARRATIVE.doc Page 3

2.3 Lime shall be dolomitic agricultural ground 1 limestone containing not less than 10
percent magnesium oxide.
2.4 Phosphate shall be 20 percent super phosphate or equivalent.
2.5 Provide grass seed mixture as shown on the plans.
2.6 Silt fence shall consist of non -biodegradable filter fabric (Trevira, Mirafi, etc.) wired to
galvanized wire mesh fencing and supported by wood or metal posts.
2.7 NCDOT Class B stone for erosion control.
PART 3 - EXECUTION
3.1 CLEARING
A. Clearing and grubbing shall be scheduled and performed in such a manner that
subsequent grading operation and erosion control practices can follow immediately
thereafter. Excavation, burrow, and embankment operations will be conducted such
that continuous operation. All construction areas not otherwise protected shall be
planted with permanent vegetative cover within 15 working days after completion of
active construction.
3.2 STABILIZING
A. The angle for graded slopes and fills shall be no greater than the angle that can be
retained by vegetative cover or other adequate erosion control devices or structures.
All disturbed areas not to be paved and left exposed will, within 15 working days of
completion of any phase of grading, be planted or otherwise provided with either
temporary or permanent ground cover, devices, or structures sufficient to restrain
erosion.
3.3 REGULATORY REQUIREMENTS
A. Whenever land disturbing activity is undertaken on a tract, a ground cover sufficient to
restrain erosion must be planted or other wise provided within 15 working days on that
portion of the tract upon which further active construction is to being undertaken.
B. If any earthwork is to be suspended for any reason whatsoever for longer than 15
calendar days, the areas involved shall be seeded with vegetative cover or otherwise
protected against excessive erosion during the suspension period. Suspension of work in
any area of operation does not relieve the Contractor of the responsibility for the
control of erosion in that area.
PART 4 - CONSTRUCTION PHASE
4.1 PRACTICES
A. Avoid dumping soil or sediment into any streambed or watercourse. Backfili for stream
crossings shall be placed dry and compacted to minimize siltation of the watercourse,
where applicable.
S:Q022100M20 Tech1EROSION DESIGN NARRATIVE.doc Page 4

Maintain an undisturbed vegetative buffer where possible between a natural
watercourse and trenching and grading operations.
C. Avoid equipment crossings of streams, creeks, and ditches where practicable.
PART 5 - SEDIMENT CONTROL FEATURES
5.1 GENERAL
A. All devices (silt fences, retention areas, etc.), for sediment control shall be constructed
at the locations indicated prior to beginning excavation on the site. All devices shall be
properly maintained in place until a structure or paving makes the device unnecessary
or until directed to permanently remove the device.
5.2 DESIGN APPLICATIONS
A. Mulch shall be used For temporary stabilization of areas subject to excessive erosion,
and for protection of seed beds after planting where required.
1. Jute, mesh, etc. should be installed as per manufacturer's instructions.
B. Silt fences shall be used at the base of slopes and in drainage swales to restrict
movement of sediment from the site. Straw bales may be required for reinforcement.
C. Riprap shall be used at the proposed outfall pipes as indicated on plans.
D. Establish vegetative cover on all unpaved areas disturbed by the work.
1. Preparation of Seedbed. Areas to be seeded shall be scarified a depth of 6
inches until a firm, well -pulverized, uniform seedbed is prepared. Lime,
phosphorous, and fertilizer shall be applied during the scarification process in
accordance with the following rates.
a. Lime - 1 ton per acre
b. Phosphorous - 500 pounds per acre
C. Fertilizer - 500 pounds per acre
2. Seeding. Disturbed areas along roads and ditches shall be permanently seeded
with 500 pounds per acre of Wilmington Bahia during the period from March
through September. Seeding performed during the period from October to
February shall be temporarily seeded with 45 pounds per acre of Annual Rye. The
permanent vegetative cover will be over seeded at the earliest possible time as
specified above.
3. Mulch all areas immediately after seeding. Mulch shall be applied and anchored
as specified hereinbefore.
5.3 MAINTENANCE
A. The Contractor shall be responsible for maintaining all temporary and permanent
erosion control measures in functioning order. Temporary structures shall be maintained
until such time as vegetation is firmly established and grassed areas shall be maintained
until completion of the project. Areas which fail to show a suitable stand of grass or
which are damaged by erosion shall be immediately repaired.
S:r202210001120 Tech1EROSION DESIGN NARRATIVE.doc Page 5

5.4 REMOVAL OF SEDIMENT CONTROL DEVICES
A. Near completion of the project, when directed by the Owner's agent, the Contractor
shall dismantle and remove the temporary devices used for sediment control during
construction. All erosion control devices in seeded areas shall be left in place until the
grass is established. Seed areas around devices and mulch after removing or filling
temporary control devices.
END OF SECTION 02410
S:Q022\0001\20 Tech1EROSION DESIGN NARRATIVE.doc Page 6

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