SW8910501_HISTORICAL FILE_19910607

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 %OS01
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
® HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD
i

State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James G Martin, Governor Bob Jamieson
William W Cobey, Jr, Secretary Regional Manager
June 7, 1991
DIVISION OF ENVIRONMENTAL MANAGEMENT
Mr. Ben DeBlois, Vice President for Administrative Services
Brunswick Community College
Post Office Box 30
Supply, North Carolina 28462
Subject: Certification of Compliance
with Stormwater Regulations
Stormwater Project No. 910501
Odell Williamson Auditorium @
Brunswick Community College
Brunswick County
Dear Mr. DeBlois:
This Certification is pursuant to the application for
the Odell Williamson Auditorium received on May 1, 1991, with
additional information received on May 28, 1991. Based on our
review of the project plans and specifications, we have
determined that the stormwater control system complies with the
Stormwater Regulations set forth in Title 15A NCAC 2H.1003(1).
The runoff will be treated in a detention pond sized to achieve
85% reduction in Total Suspended Solids.
This Certification shall be effective from the date of
issuance until rescinded. The project shall be constructed and
maintained in accordance with the plans and specifications
approved by the Wilmington Regional Office.
A professional engineer must certify that the
stormwater system has been installed in accordance with the
approved plans and specifications upon completion of
construction. The attached certification should be received
by this Office within 30 days of completion of construction.
Continued
127 Cardinal Drive Extension Wilmington N C 2W5 3945 • Telephone [phone] • Fax 919-350,2004
An Equal Opporti my, Affirmative Amon Employer

Mr. DeBlois
June 7, 1991
Page Two
----------------
If you have any questions concerning this matter, please
call Alexis Finn or me at [phone].
Sincerely,
Dave Adkins
Water quality Supervisor
DA/aif: 910501.JUN
cc: Daniel Latta, P.E , R.L.S.; Talbert and Bright, Inc.
Robert Tucker, P.E.
John Parker, DCM
Bill Mills
Jim Gregson
Alexiss Einn— —�
c�Wllmington-Regiona-l—Of=face
Central Files

DIVISION OF ENVIRONMENTAL MANAGEMENT
Evaluation of Stormwater Treatment and Disposal System
Draining to Waters Other Than Class SA
PROJECT DATA
Project Name: Odell Williamson Auditorium @
Brunswick Community College
Project No.. 910501
Location (County, Township/Municipality, Address):
Brunswick County
Applicant Name: Mr. Ben DeBlois
Mailing Address: Vice President for Administrative Affairs
Brunswick Community College
Post Office Box 30
Supply, North Carolina 28462
Submittal Date:
May 1, 1991
Water Body Receiving Stormwater Runoff: Clark Branch
Classification of Water Body: "C NSW"
WET DETENTION POND EVALUATION
1. Yes No The design storage is for the runoff from all
impervious surfaces resulting from 1-inch of
rainfall and is located above the permanent
pool.
2. Yes No The permanent pool is designed for 85% TSS
removal.
3. Yes No The runoff completely draws down to the
permanent pool in 5 days, but not less than 2
days.
4. Yes No The mean depth of the permanent pool is a
minimum of 3 feet.
5. Yes No The inlet structure is designed to minimize
turbulence and short circuiting.
6. Yes No All overflow and discharge flows through a
vegetative filter at least 30 feet in length.
7. Yes No A method is used to provide even distribution of
runoff over the length of the vegetative filter.
Continued

WET DETENTION POND EVALUATION CONTINUED
8. Yes No
The slope and width of the vegetative filter
provides non -erosive flow for the 10-year and
24-hour storm with a 10-year, 1-hour intensity.
9. Yes No
The vegetative filter has a slope of 58 or less.
10. Yes No
The vegetative filter is natural, grassed or
artificially planted wetland vegetation.
11. Yes No
An appropriate operation and maintenance plan
has been provided for the system.
12. Yes No
THIS PROJECT MEETS THE STORMWATER CONTROL
REQUIREMENTS OF 15A NCAC 2H. (g), (1), (j), (k),
and (1) (For Yes, 1 through 11 must all be
circled Yes.)
Brief Explanation: This detention pond is designed to remove 85%
total suspended
solids and will therefore be operated with a
vegetative filter.
DIVISION OF ENVIRONMENTAL MANAGEMENT SIGN -OFF
Wilmington Regional Office
In vidual Evaluating Form/Plans
RegiOtta'Y ater uality Supervisor
cc: Applicant/WiRO/Mills/CF

Engineer's Certification
I, , as a duly registered
Professional Engineer in the State of North Carolina, having
been authorized to observe (periodically/weekly/full time) the
construction of the project,
Project)
for the hereby state that, to
(Project Owner)
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.
Signature
Registration Number
Date

T,4LBERTcF BR/GHT,11
engmee) ing & planning consultants RECEIVED
MAY 2 81991
Wilmington R ftitpnl Office
I
May 24, 1991
Ms Alexis Finn
Division of Environmental Management
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
RE Brunswick Community College
Williamson Auditorium
Storm Water Management Plan
TBI No 5101-9006
Dear Ms Finn
In response to your review letter of May 20 we have made the following additions to the
Storm Water Management Plan Our responses are listed below to correspond with the
items in your May 20 letter
1 Our calculations show that we are providing approximately 21,200 cubic feet
of storage between the normal water elevation of 33 0 and the top of the
overflow riser at elevation 35 0 Our required storage volume based on
percent impervious for the site is 10,954 cubic feet Our 1" orifice was sized
to release the required 10,954 cubic feet in no less than 2 days and no more
than 5 days following a storm event If we were to use a larger orifice as
stated in your letter, our discharge rate would be such that the required
storage volume would be discharged in less than 2 days We believe our
design as presented, with a 1" orifice, is the correct interpretation of the
regulations
2 The grades on the access road across the power line right of way and on the
west side of the site (adjacent to the parking lot) have been revised to show
all the runoff from the paved road being diverted into the parking lot and into
the storm drainage system and into the detention pond The revised plans are
in agreement with our discussion last week with you, Dave Atkins and myself
regarding the reduction in the amount of paved surface that is not being
directed into the detention pond
3 No swale contours are needed at the outlet end of the 66' storm drain passing
underneath the access road to the front of the building The outlet invert of
the pipe is at existing grade and is protected with a riprap energy dissipator
to prevent erosion of the downstream area The plans have been revised to
The Cotton Exchange • 321 N Front Street • Wilmington, North Carolina 28401 • 919 763-5350

Ms Alexis Finn
Division of Environmental Management
May 24, 1991
Page 2
show the area immediately downstream of this pipe to remain uncleared to
help protect the wetlands area
4 We have added a detail and vegetation and seeding specifications for the
vegetative swales to the plan sheet
5 We have revised the operation and maintenance plan to include all swales in
item 1 under maintenance of the plan as requested We have also revised
DEM's address and phone number for notification in the plan
We are enclosing two copies of the revised Operation and Maintenance Plan and two copies
of revised plan sheet Cl showing these changes We trust this information will allow you to
complete your review and approve the Storm Water Management Plan for this project If
you have any further questions or need additional information please call
Sincerely,
/- bi �
R Daniel Latta, P E, R L S
Enclosure
c Ken Phelps, Boney Architects

State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James G Martin, Governor
William W Cobey, Jr, Secretary
May 20, 1991
DIVISION OF ENVIRONMENTAL MANAGEMENT
Mr R Daniel Latta, P.E , R L S
Talbert & bright, Inc.
321 North Front Street
Wilmington, North Carolina 28401
Subject. Fdditional Information
Stormwater 'ro3ect No 910501
Odell Williamson Auditorium
@ Brunswick Community College
Brunswick County
Dear Mr Latta.
Bob Jamieson
Regional Manager
The Wilmington Regional Office received a Stormwater
Management Plan for Talbert & Bright, Inc on May 1, 1991 A
preliminary review has determined that the submittal for the
subject project is not complete The following information is
needed to continue the stormwater review
1 A discrepancy exists in storage volume Measuring the
topographic elevations with the planimeter and
computing a volume provides 23,908 cf of storage
capacity almost twice your calculated volume This
results in requiring a orifice diameter of 1 2 to 1 9
inches
2 Runoff from the road areas must be routed to the
detention pond
3 Provide swale contours at the effluent of the 66 ft
15 in SD
4. Cross sectional detail of the swale with seeding
specifications noted.
5. Please add the swales to the Operation and Maintenance
Plan Erosion will quickly become severe if the swales
are not maintained with stable vegetation. Sodding the
area may be necessary to provide stable vegetation
Also, our new phone number is [phone]
-Continued-
127 Cardinal Drive Extension Wilmington, NC 28405-3845 • Telephone [phone] • Fax [phone]
An Equal Opportunity AfGrmanve Amon Employer

Mr Latta
May 20, 1991
Page Two
-------------
Please note that this is a preliminary review. This
information should be received by this office no later than June
19, 1991, or your project will be returned as incomplete.
Construction of the subject project may not commence prior to
approval of the Stormwater Management Plan. If you have any
questions, you may call me at telephone number [phone].
Sinc ely,
Ms Alexis I. Finn
Environmental Engineer
AIF 910501 MAY
cc IZZ2)—Alexrs—Frnn)
Bill Mills
Central Files

MZ9697S BR/GhTTr /NC.
enguieemig & planning consultants
April 26, 1991
Mr Dave Adkins
Division of Environmental Management
127 Cardinal Drive Extension
Wilmington, North Carolina 28405-3845
RE Stormwater Permit Certification
Odell Williamson Auditorium
Brunswick Community College, Brunswick County
TBI No 5101-9006
Dear Mr Adkins
Enclosed for your review and approval is the application for the stormwater permit for the
proposed Odell Williamson Auditorium at Brunswick Community College Included in this
package are two sets of plans, the submittal form, calculations, and authorization letter from
Owner
The application for an Erosion and Sedimentation Control Permit is being made concurrent
with this submittal
If you have any questions or need additional information, please advise
Sincerely,
4 ~v�
R Daniel Latta, P E, R L S
RDL/mbr
Enclosure
c Kenneth M Phelps, AIA, Boney Architects
Daniel Sams, P E , Land Quality
LDI
DEM
r=0d# io50
The Cotton Exchange • 321 N Front Street • Wilmington, North Carolina 28401 • 919 763-5350

74MEATS BR/GhTT, /NC.
engtneetrn; d planning consultants
April 26, 1991
Mr Daniel Sams, P E
Land Quality Section
NCDEHNR
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
RE Odell Williamson Auditorium - Brunswick Community College
Brunswick County
TBI No 5101-9006
Dear Dan
Enclosed for your review and approval is an application for a Sedimentation and Erosion
Control Permit for construction of the proposed Odell Williamson Auditorium at Brunswick
Community College in Brunswick County We have included two sets of plans, technical
specifications, the signed and notarized application form and a check for the application fee
The Stormwater Management Plan has been submitted to the Division of Environmental
Management for approval
If you have any questions or need additional information to complete your review, please
advise
Sincerely, D
404
R Daniel Latta, PE, RLS
RDL/mbr
Enclosure I �� u LD
c Kenneth M Phelps, ALA, Boney Architects }491
„Dave Adkins, D E M 1 D E M
,rt)j # q1 IS0\
The Cotton Exchange • 321 N Front Street • Wtbntngton, North Carolina 28401 • 919 763-5350

0
"COlANTUNI'I`Y COLLEGE t,
P 0 BOX 30 • SUPPLY, NO 28462 • [phone] • [phone] • [phone]
Mr.Dave Adkins
Division of Environmental Management
7225 Wrightsville Avenue
Wilmington, NC 28403-3696
RE. Odell Williamson Auditorium at Brunswick Community College
Stormwater Permit Certification
Dear Mr Adkins.
0
This letter is to serve as authorization for R Daniel Latta, P.E of
Talbert & Bright, Inc., our Consulting Engineer, to submit on our behalf
the plans, calculations and supporting data for your review and proposed
Odell Williamson Auditorium at Brunswick Community College Any questions
or request for additional information requied for review should be direc-
ted to Mr. Latta.
0
Sincerely,
`7N� _--� _L� �r_"
Ben DeBlois
Vice President for Administrative Service
North Carolina
Brunswick County
I, 0 1 , a
do hereby c rtify that
appeared before me this ackn
instrument.
0
Public for said County and State,
�personally
the execution of the forefoing
Witness my hand and official seal, this the ��ittlay of %116 L, 19.ZL
My commission expires , 19-0
DEM
Pr,03 #_C(o so

m 4
.j
0
STORM DRAINAGE DESIGN DATA SHEET
STORMLOCATION. Vnaij,,�wvv- Cy CHECKED BY WDLSHEET--L—OF—.
mm
W.
C-
........�...
.........
..
�
.�.
.�
--�
..m
C..........:
Vol
..
:...�..mm
r............_
Moog
m
Ei
�mmm
EA'r
i
�mmmm
��I►r.Tlww
j� C .
RUNOFF COEFFICIENT
N . COEFFICIENT Of FRICTION
IVUIL. ULWtN a UAxU UN
11 -
IIEIGIII ABOVE INLET Of MOST REMOTE POINT
S - SLOPE (R)
THE SUM OF 111E AREAS
L -
LENGTH OF DRAINAGE AREA
O • FLOW (Cf 5)
AND NOT 111E SUM Of
I .
W1ENS11T OF STORM (INCHES)
111E DISCHARGES

STORM DRAINAGE DESIGN DATA SHEET
LOCATIONPROJECT QVSWWluwhhdl�� COMPUTED BY DATE 4110 .91
:W ..
STORM FREQUENCY
PIPE DATA
Ron
ME
_--_---_
---_-__
�IRA�mm
mm
mmm
W"
���m��
,
,
m,;,m.�.mmm
m
mmolff"I'mm
....�m"no
....
.
Mffmmmm
MEN=
m1mmmm
in
.�m����
'mmmmmmm
..........
mmmm�.�.".■...m....
m
M4
mmeammmm,f
C -
RUNOFF COEFFICIENT
N COEFFICIENT Of FRICTION
IVUIL: DESIGN IS BASLD UN
It .
IIEIGIIT ABOVE INLET OF MOST REMOTE POINT
S SLOPE (R)
DIE SUM OF DIE AREAS
L .
LENGTH OF DRAINAGE AREA
O FLOW (C F S)
AND NOI 111E SUM OF
1 .
INTENSITY OF STORM (INCHES)
111E DISCHARGES

8967 SITE CLEARING
SECTION 02110 - SITE CLEARING
PART 1 - GENERAL
RELATED DOCUMENTS
Drawings and general provisions
and Supplementary Conditions
Sections, apply to this section.
SUMMARY
02110 - 1
of Contract, including General
and Division 1 Specification
This Section includes the following:
Protection of existing trees.
Removal of trees and other vegetation.
Topsoil stripping.
Clearing and grubbing.
Removing above -grade improvements.
Removing below -grade improvements.
PROJECT CONDITIONS
°� )NLIflI
lf� PAY r leal L�
.ADEM
.PT.oJ W 9(9! aDt
Traffic: Conduct site clearing operations to ensure minimum
interference with roads, streets, walks, and other adjacent
occupied or used facilities. Do not close or obstruct streets,
walks or other occupied or used facilities without permission
from authorities having jurisdiction.
Protection of Existing Improvements: Provide protections
necessary to prevent damage to existing improvements indicated to
remain in place.
Protect improvements on adjoining properties and on Owner's
property.
Restore damaged improvements to their original condition, as
acceptable to property owners.
Protection of Existing Trees and Vegetation: Protect existing
trees and other vegetation indicated to remain in place, against
unnecessary cutting, breaking or skinning of roots, skinning or
bruising of bark, smothering of trees by stockpiling construction
materials or excavated materials within drip line, excess foot or

vehicular traffic, or parking of vehicles within drip line.
Provide temporary guards to protect trees and vegetation to be
left standing.
Water trees and other vegetation to remain within limits of
contract work as required to maintain their health during
course of construction operations.
Provide Protection for roots over 1-1/2 inch diameter that
are cut during construction operations. Coat cut faces with
an emulsified asphalt, or other acceptable coating,
formulated for use on damaged plant tissues. Temporarily
cover exposed roots with wet burlap to prevent roots from
drying out; cover with earth as soon as possible.
Repair or replace trees and vegetation indicated to remain
which are damaged by construction operations, in a manner
acceptable to Architect. Employ a licensed arborist to
repair damages to trees and shrubs.
Replace trees which cannot be repaired and restored to full -
growth status, as determined by arborist.
Salvable Improvements: Carefully remove items indicated to be
salvaged, and store on Owner's premises where indicated or
directed.
PART 2 - PRODUCTS
Not applicable to this Section.
PART 3 - EXECUTION
SITE CLEARING
General: Remove trees, shrubs, grass and other vegetation,
improvements, or obstructions as required to permit installation
of new construction. Remove similar items elsewhere on site or
premises as specifically indicated. "Removal" includes digging
out and off -site disposing of stumps and roots.
Cut minor roots and branches of trees indicated to remain in
a clean and careful manner, where such roots and branches
obstruct installation of new construction.
Topsoil: Topsoil is defined as friable clay loam surface soil
found in a depth of not less than 4 inches. Satisfactory topsoil
is reasonably free of subsoil, clay lumps, stones, and other
objects over 2 inches in diameter, and without weeds, roots, and
other objectionable material.

Strip topsoil to whatever depths encountered in a manner to
prevent intermingling with underlying subsoil or other
objectionable material.
Remove heavy growths of grass from areas before stripping.
Where existing trees are indicated to remain, leave
existing topsoil in place within drip lines to prevent
damage to root system.
Do not strip topsoil in areas reserved for wastewater
nitrification field and repair area.
Stockpile topsoil in storage piles in areas indicated or
directed. Construct storage piles to provide free drainage of
surface water. Cover storage piles, if required, to prevent wind
erosion.
Clearing and Grubbing: Clear site of trees, shrubs and other
vegetation, except for those indicated to be left standing.
Completely remove stumps, roots, and other debris protruding
through ground surface.
Use only hand methods for grubbing inside drip line of trees
indicated to remain.
Fill depressions caused by clearing and grubbing operations
with satisfactory soil material, unless further excavation or
earthwork is indicated.
Place fill material in horizontal layers not exceeding 6
inches loose depth, and thoroughly compact to a density
equal to adjacent original ground.
Removal of Improvements: Remove existing above -grade and below -
grade improvements as indicated and as necessary to facilitate
new construction.
Abandonment or removal of certain underground pipe or
conduits may be indicated on mechanical or electrical
drawings, and is included under work of related Division 15
and 16 sections. Removal of abandoned underground piping or
conduit interfering with construction is included under this
Section.
DISPOSAL OF WASTE MATERIALS
Burning on Owner's Property: Burning is not permitted on Owner's
property.

Removal from Owner's Property: Remove waste materials and
unsuitable or excess topsoil from Owner's property.
END OF SECTION 02110

SECTION 02190 - EROSION & SEDIMENTATION CONTROL
PART 1 - GENERAL
RELATED DOCUMENTS
Drawings and general provisions of Contract, including General
and Supplementary Conditions and Division 1 ,Specification
Sections, apply to this section.
The General Contractor shall, upon suspension or completion of
land -disturbing activities, provide protective 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 effective, and
continuous erosion and siltation control throughout the
construction and post construction period.
fyilului� i9
This Section includes the following: The General Contractor
shall prevent the erosion of soil and the sedimentation of
streams, lakes, reservoirs, other water impoundments, ground
surfaces, streets, existing storm drainage systems, or other
property. All erosion and sedimentation control measures shall
comply with applicable State and Local regulations.
PROJECT CONDITIONS
Traffic: Conduct erosion and sedimentation control operations to
ensure minimum interference with roads, streets, walks, and other
adjacent occupied or used facilities. Do not close or obstruct
streets, walks or other occupied or used facilities without
permission from authorities having jurisdiction.
REGULATORY REQUIREMENTS
The Contractor shall be responsible for prevention of damage to
properties within the construction limits and outside the
construction limits from erosion and siltation due to
construction of the project. The Contractor shall assume all
responsibilities to the affected property owners for correction
of damages which may occur. Erosion and sedimentation control
measures shall be performed by the Contractor, conforming to the
requirements of and in accordance with the drawings approved by
the North Carolina Dept. of Environmental Health and Natural
Resources and as per the erosion control portion of the Contract
Documents. The Contractor shall not allow mud and debris to
accumulate in the streets. Should the Contractor pump water from
9967 EROSION & SEDIMENTATION CONTROI. 02190 - 1

trenches during construction, appropriate siltation preventative
measures shall be taken prior to discharge of pumped water into
any storm drain or stream. The Contractor shall not allow
sediment, mud, or debris to become deposited in any areas
identified as "wetlands" on the Drawings.
PART 2 - PRODUCTS
Mulching Cloth: shall be open mesh, biodegradable.
Fertilizer: 10-10-10 grade commercial fertilizer.
Lime: dolomitic agricultural ground limestone containing not
less than 10 percent magnesium oxide.
Phosphate: 20% superphosphate.
Seed: Refer to seeding schedule.
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.
Rip -ran: NCDOT Class 1.
Erosion Control Stone: NCDOT Class A.
PART 3 - EXECUTION
CLEARING
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 and
embankment operations will be conducted such that cuts and fills
will be completed to final grades in a continuous operation. All
construction areas not otherwise protected shall be planted with
permanent vegetative cover within 30 working days after
completion of active construction.
STABILIZING
The angle for graded slopes and fills shall be no greater than
the angle which 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 30 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.
8967 EROSION 6 SEDIMENTATION CONTROL 02190 - 2

REGULATORY REQUIREMENTS
Whenever land disturbing activity is undertaken on a tract, a
ground cover sufficient to restrain erosion must be planted or
otherwise provided within 30 working days on that portion of the
tract upon which further active construction is not being
undertaken.
If any earthwork is to be suspended for any reason whatsoever for
longer than 30 calender 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 for the
responsibility for the control of erosion in that area.
CONSTRUCTION PHASE PRACTICES
The contractor shall not dump soil or sediment into any stream
bed or watercourse. Backfill for stream crossings, if any, shall
be placed dry and compacted to minimize siltation of the
watercourse.
The Contractor shall maintain an undisturbed vegetative buffer
where possible between a natural watercourse and trenching and
grading operations.
The Contractor shall avoid equipment crossings of streams,
creeks, and ditches where possible.
SEDIMENT CONTROL FEATURES
All devices (silt fences, sand fences, and retention area, 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.
DESIGN APPLICATIONS
Mulch shall be used for temporary stabilization of areas subject
to excessive erosion, and for protection of seed beds after
planting where required.
Jute, mesh, etc. should be installed as per manufacturer's
instructions.
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.
Rio -rap shall be used at the outfall pipes and swales as
indicated on plans.
8967 EROSION 6 SEDIMENTATION CONTROL 02190 - 3

Establish vegetative cover on all unpaved areas disturbed by
the work.
Preparation of Seedbed: Areas to be seeded shall be
scarified a depth of 6" until a firm, well pulverized,
uniform seedbed is prepared. Lime phosphorous, and
fertilizer shall be applied during the scarification
process in accordance with the seeding schedule.
Seeding: Disturbed areas along roads and ditches shall be
permanently seeded.
Mulch all areas immediately after seeding. Mulch shall be
applied and anchored as specified above.
TEMPORARY SEEDING:
Temporary seeding shall be placed on all disturbed areas to
provide temporary cover until installation of paving or final
seeding and to stabilize any areas that will not be brought to
final grade for a period of more than 30 working days.
Seedbed preparation shall be in accordance with Section 02900.
Lime shall be applied at a rate of 2000 pounds per acre.
Fertilizer shall be applied at the rate of 1000 pounds per acre.
Mulch all areas that receive temporary seeding with 4,000
lbs/acre of straw. Anchor straw by tacking with asphalt, netting
or a mulch anchoring tool.
Seeding mixtures shall be applied as follows:
For areas seeded between December 1 and April 15:
Rye(grain) 120 lbs/acre
Kobe Annual Lespedeza (Kobe) 50 lbs/acre
For areas seeded between April 15 and August 15:
German millet
40 lbs/acre
For areas seeded between August 15 and November 30
Rye (grain)
120 lbs/acre
The Contractor shall be responsible for protection of seeded
areas. Damaged areas shall be reseeded, fertilized and mulched
immediately following any erosion or other damage to the seeded
areas.
Areas receiving temporary seeding between August 15 and November
30 (120 lbs/acre of rye (grain)) shall be top dressed with 50
lbs/acre of nitrogen in March. If these areas of temporary
8967 EROSION & SEDIMENTATION CONTROL 02190 - 4

seeding are to remain beyond June 15, over seed all areas with 50
lbs/acre of Kobe lespedeza in late February or early March.
If using hydroseeding to apply' seeding, mix specified seed,
fertilizer, and pulverized cellulose fibre mulch in water, using
equipment specifically designed for hydroseed application. Mix
until uniformly blended into homogeneous slurry suitable for
hydraulic application. Supply and install cellulose fibre mulch
to produce coverage at the rate of 2000 pounds per acre.
Apply slurry uniformly to all areas to be seeded. The rate of
application shall be as required to obtain specified seed sowing
rate and mulch coverage of 2000 pounds per acre.
MAINTENANCE
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.
REMOVAL OF SEDIMENT CONTROL DEVICES
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.
Removal from Owner's Property: Remove waste materials and
unsuitable or excess topsoil from Owner's property.
END OF SECTION 02110
8967 EROSION 6 SEDIMENTATION CONTROL 02190 - 5

SECTION 02200 — EARTHWORK
IVMW�01u0.e
ZA 71 W.14 V 91 aMak W 0 1 BEE
Drawings and general provisions of the Contract, including General and
Supplementary Conditions and Division 1 specif ication sections, apply to work
of this section.
DESCRIPTION OF WORK:
The extent of earthwork is shown on the drawings.
Preparation of subgrade for building slabs, walks, and pavements is
included as part of this work.
Drainage fill course for support of building slabs is included as part of
this work.
Backfilling of trer:ches within building lines is included as part of this
work.
QUALITY ASSURANCE:
Codes and Standards: Perform excavation work in compliance with applicable
requirements of gcve=ng authorities having jurisdiction.
Testing and Inspection Service: Owner will engage soil testing and inspection
service for quality control testing during earthwork operations.
SUBMITTALS
Test Reports -Excavating: The following reports will be submitted directly to
the Architect fran the testing services, with a copy to the Contractor:
Test reports on borrow material.
Field density test reports.
JOB CONDITIONS•
Site Information: Data on indicated subsurface conditions are not intended as
representations or Harranties of accuracy or continuity between soil borings.
It is expressly understood(that Owner will not be responsible for
interpretations or conclusions dawn therefran by Contractor. Data are made
available for oormemence of Contractor.
Additional test borings and other exploratory operations may be made by the
Contractor at no cost to the Owner.
EPRTHTAURK 02200 - 1
3677 (030191) 8967

Existing Utilities: Locate existing undergrounrd utilities in areas of work.
If utilities are to remain in place, provide adequate means of protection
during earthwork operations.
Should uncharted, or incorrectly charted, piping or other utilities be
encountered during excavation, consult utility owner immediately for
directions. Oooperate with Owner and utility canpanies in kec-ping respective
services and facilities in operation. Repair damaged utilities to satisfac-
tion of utility owner.
Do not interrupt existing utilities serving facilities occupied and used by
Owner or others, except when permitted in writing by Architect and then only
after acceptable teTporary utility services have been provided.
Demolish and completely remove fran site existing underground utilities
indicated to be removed. O7ordinate with utility canpanies for shut-off of
services if lines are active.
Use of Explosives: The use of explosives is not permitted.
Protection of Persons and Property: Barricade open excavations occurring as
part of this work and post with warning lights.
Operate earning lights as recamrended by authorities having jurisdiction.
Protect structures, utilities, sidewalks, pavanents, and other facilities from
damage caused by settlement, lateral movement, undermining, washout and other
hazards created by earthwork operations.
PART 2 - PRODUCPS
w oftmzpriYah�
In general, shall be free of debris, roots, wood, scrap material, vegetation,
refuse, soft unsound particles, frozen deleterious, or objectionable
materials. Maximum particle size shall be 6 inches unless specified
otherwise.
Backfill and Fill: For structures and under spread `footings, paving, or
concrete slabs on grade vdhich are not pile supported shall conform to the
general requirements for soil materials above and shall be classified as:
GW - well -graded gravel, sandy gravel; GM - Silty gravel, silty gravel with
sand; SW - well -graded sand, well -graded sand with gravel; SM - silty sand,
silty sand with gravel; GC - clayey gravel, clayey gravel with sand; or SC
- clayey sand, clayey sand with gravel, by A= D 2497 and conform to the
following: liquid limit shall not exceed 35 percent when tested in
accordance with ASPM D 423, plasticity index shall not be greater than 12
percent when tested in accordance with ASPM D 424, and no more than 25
percent by weight shall be finer than No. 200 sieve when tested in
accordance with ASPM D 1140.
EAR`I MRK 02200 - 2
3677 (030191) 8967

General site fill and embankment material shall conform to the general
requirements for soil materials above and shall be an unclassified soil
material from the site or borrow, sLhnittei for approval by the ODntractor
as possessing the characteristics required for carpactaon to the specified
values of soil density herein specified for the location of intended used.
Topsoil shall be material free of subsoil, straps, rocks larger than one
inch diameter, brush, weeds, toxic substances, and other material or
substance detrirrental to plant growth. Zbpsoil shall be a natural, friable
soil representative of productive soils in the vicinity.
Borrow shall be materials conforming to the requirements for general site
fill, fill, and backfill.
POROUS FILL:
Filter Stone for capillary water harrier under structures shall conform to the
general requirements for soil materials above and shall be a clean coarse
grained crushed stone, uncrushed gravel, or crushed gravel conforming to the
following gradation: 90 to 100 percent passing the 3/4-inch sieve and a
mraxamn of 40 percent passing the No. 40 sieve and zero percent gassing the
No. 200 sieve, and with a sand equivalent of not less than 50 vdnen tested in
acoordance with ASPM D 2419.
i... art lk � •ki
EXCAVATION:
Excavation consists of removal and disposal of material encountered when
establishing required finish elevations.
Excavation Classifications: Excavation for all spaces below grade as required
for all foundation work, walls, pits and other subsurface spaces indicated for
the construction of these pr03ects. All excavation required for pro3ects
shall be bid on an unclassified basis.
Earth excavation, unless otherwise indicated, includes removal and disposal of
pavements and other obstructions visible on ground surface, underground
structures and utilities .indicated to be demolished and removed. All required
excavation shall be performed on an unclassified basis.
Unauthorized excavation consists of removal of materials beyond indicated
subgrade elevations or dinansaons without specific direction of Architect.
Unauthorized excavation, as well as remedial work directed by Architect, shall
be at Contractor's expense.
Backf ill and compact unauthorized excavations as specified for authorized
excavations of same classification, unless otherwise directed by Architect.
EPR'IIMORK 02200 - 3
3677 (030191) 8967

Additional Excavation: When excavation has reached required subgrade
elevations, notify Architect who will make an inspection of conditions.
If unsuitable bearing materials are encountered at required subgrade
elevations, carry excavations deeper and replace excavated material as
directed by Architect.
Removal of unsuitable material and its replacement as directed will be paid on
psis of contract conditions specified in Division 1 and/or quoted bid prices.
Stability of Excavations: Slope sides of excavations to canply with local
codes and ordinances having 3urisdictuon. Shore and brace vhere sloping is
not possible because of space restrictions or stability of material excavated.
Maintain sides and slopes of excavations in safe condition until completion of
backfilling.
Shoring and Bracing: Provide materials for shoring and bracing, (when
necessary) such as sheet piling, uprights, stringers and cross -braces, in good
serviceable condition.
Establish requiranents for trends shoring and bracing to comply with local
codes and authorities having 3usrsdiction.
Maintain shoring and bracing in excavations regardless of time period
excavations will be open. Carry down shoring and bracing as excavation
progresses.
Dewaterrng: Prevent surface water and subsurface or groundwater from flowing
into excavations and fran flooding pro3ect site and surrounding area.
Do not allow water to accumulate in excavations. Remove water to prevent
softening of foundation bottoms, undercutting footings, and soil changes
detrimental to stability of subgrales and foundations. Provide and maintain
pumps, well points, sumps, suction and dusduarge lines, and other devatering
system components necessary to convey water away from excavations.
Canvey voter removed from excavations and rain cater to collecting or run-cff
areas. Establish and maintain tecporary drainage ditches and other diversions
outside excavation limits for each structure. Do not use trench excavations
as temmporary drainage ditches.
Material Storage: Stockpile satisfactory excavated materials where directed,
unless required for backf ill or f ill. Place, grade and shape stockpiles for
proper drainage.
Locate and retain soil materials away from edge of excavations.
Dispose of excess soil material and waste materials as herein specified.
EAR'IIMIRZ 02200 - 4
3677 (030191) 8967

Excavation for Structures: Nrfform to elevations and dimensions shown within
a tolerance of plus or minus 0.10 feet, and extending a sufficient distance
from footings and foundations to permit placing and removal of concrete
formwork, installation of services, other construction, and for inspection.
In excavating for footings and foundations, take care not to disturb bottan of
excavation. True bottoms to required lines and grades to leave solid base to
receive other work.
Excavations for footings shall extend below footing bearing elevation to
remove existing unsuitable fill material. See details on drawings for limits
of excavations. Architect or testing lab at Architect's direction, shall
inspect excavation bottcns before backfilling.
Excavation for Pavements: Cut surface under pavements to comply with
cross -sections, elevations and grades as shown. Excavate two feet below
bottan of pavement or through existing fill, whichever is shallower.
Excavation for Trenches: Dig trenches to the unifcsm width required for
particular item to be installed, sufficiently wide to provide ample working
roan.
Excavate trenches to depth indicated or required. Carry depth of trenches for
piping to establish indicated flaw lines and invert elevations. Beyond
building perimeter, keep bottoms cf trendies sufficiently below finish grade
to avoid freeze -ups.
Where rock is encountered, carry excavation 6 inches below required elevation
and backf ill with a 6-inch layer of crushed stone or gravel prior to
installation of pipe.
Grade bottans of trenches as indicated, notching under pipe bells to provide
solid bearing for entire body of pipe.
Backfrll trenches with concrete where trench excavations pass within 18 inches
of column or wall footings and which are carried below bottan of such
footings, or which pass under wall footings. Place concrete to level of
bottan of ad3acent footing.
Concrete is specified in Division 3.
Do not backf ill trenches until tests and inspections have been made and
backf filling authorized by Architect. Use care in backf filling to avoid damage
or displacement of pipe systems.
Cold Weather Protection: Protect excavation bottoms against freezing when
atnospheric temperature is less than 35 degrees F (one degree C) .
EARTiWORK 02200 - 5
3677 (030191) 8967

COMPACPION:
General: Control soil compaction during construction providing minimum
percentage of density specified for each area classification.
Percentage of Maximum Density Requirements: Compact soil to not less than the
following percentages of maximum density as determined in accordance with ASPM
D 698 (Standard Proctor) .
Structures, Building Slabs and Steps, Pavements: Compact top 12 inches of
subgrade and each layer of backf ill or fill material at 92 percent maxrmmun
density for cohesive material or 98 percent for cohesionless material.
Lawn or Unpaved Areas: Ccnpact top 6 inches of subgrade and each layer of
backf ill or fill material at 85 percent maximum density for cohesive soils and
90 percent for ccheshonless soils.
Walkways: Canpact top 6 inches of subgrade and each layer of b3ckfill or fill
material at 90 percent maximum density for cohesive material or 95 percent for
cohesionless material.
Moisture Control: Where subgrade or layer of soil material moist be moisture
conditioned before compaction, uniformly apply cater to surface of subgrade,
or layer of soil material, to prevent free water appearing on surface droning
or subsequent to compaction operations.
Remove and replace, or scarify and air dry, soil material that is too wet to
permit canpacthon to specified density.
Soil material that is too wet to permit ccrr action shall be rEmcved and
stockpiled or spread and allowed to dry. Assist drying by discing,
harrowing or pulverizing until moisture content is reduced to a
satisfactory value.
BACKFILL AND FILL:
General: Place in acceptable soil material in layers to required subgrade
elevations, for each area classification listed below.
In excavations, use satisfactory borrow material.
Under grassed areas, use satisfactory excavated or borrow material.
Under walks and pavements, use fill material, or satisfactory excavated or
borrow material, or canbiration of both.
Under steps, use fill material.
Under building slabs, use filter stone material.
EAR'IIMRK 02200 - 6
3677 (030191) 8967
I

Backf ill excavations as promptly as work permits, but not until completion of
the following:
Acceptance of construction below finish grade including, where applicable,
damgprocf ing, vaterprocf ing, and perimeter insulation.
Inspection, testing, approval, and recording locations of underground
utilities.
Removal of concrete formwork.
Removal of trash and debris.
Ground Surface Preparation: Remove vegetation, debris, unsatisfactory soil
materials, obstructions, and deleterious materials from ground surface prior
to placement of fills. Plow, strip, or break up sloped surfaces steeper than
one vertical to 4 horizontal so that fill material will bowl with existing
surface.
When existing ground surface has a density less than that specified under
"Compaction" for particular area classification, break up ground surface,
pulverize, moisture -condition to optimum moisture content, and compact to
required depth and percentage of maximun density. Proof roll e>posed sLbgrade
with a rubber tired roller making two passes in each direction. Remove any
soil that pumps or ruts excessively.
Placement and Compaction: Place backfill and fill materials in layers not
more than 8 inches in loose depth for material compacted by heavy compaction
equipment, and not more than 4 inches in loose depth for material compacted by
hand -operated tampers.
Before compaction, moisten or aerate each layer as necessary to provide
optimum moisture content. Compact each layer to required percentage of
maximum cry density or relative dry density for each area classification. Do
not place backfill or fill material on surfaces that are muddy, frozen, or
contain frost or ice.
Place backfill and fill materials evenly ad3acent to structures, to required
elevations. Take care to prevent wedging action of backfill against
structures by carrying material uniformly around structure to approximately
same elevation in each lift.
General: Uniformly grade areas within limits of grading under this section,
including ad3acent transition areas. Smooth finished surface within specified
tolerances, compact with uniform levels or slopes between points where
elevations are shown, or between such points and existing grades.
EARTiiW7RK 02200 - 7
3677 (030191) 8967

Grading outside Building Lines: Unless indicated otherwise, grade areas
ad3ao=-nt to budding lines to drain away from structures a minimum of 6 inches
to 10 feet and to prevent porriing.
Finish surfaces free from irregular surface changes, and as follows:
Lawn or Unpaved Areas: Finish areas to receive topsoil to within not more
than 0.10 feet above or below required subgrade elevations.
Walks: Shape surface of areas under walks to line, grade and
cross-section, with finish surface not more than 0.10 feet above or below
required subgrade elevation.
Pavements: Shape surface of areas under pavement to line, grade and
cross-section, with finish surface not more than 1/2-inch above or below
required subgrade elevation.
Grading Surface of Fill Under Building Slabs: Grade snooth and even, free of
voids, compacted as specified, and to required elevation. Provide final
grades within a tolerance of 1/2-inch when tested with a 10-foot straightedge.
Compaction: After grading, compact subgrade surfaces to the depth and
percentage of maxinm density for each area classification.
PAVIIMENP SUBBASE COURSE:
General: Subbase course consists of prqDaration, shaping, and ocnpactron of
that portion of the roadbed upon vhich base or pavement, including base and
paving for shoulders, is to be placed. Subbase material placed in layers of
specified thickness over subgrade surface to support a pavement base course
shall be c Tpacted and protected in conformity with Section 500 and 520 as set
forth in North Carolina Department of Transportation Standard Specifications
dated January, 1990 except as may be noted otherwise herein. contractor shall
keep a copy at the 3cb site for reference.
See other Division 2 sections for paving specifications.
Grade Control: During construction, maintain lines and grades including craven
and cross -slope of subbase course.
Shoulders: Place shoulders along edges of subbase course to prevent lateral
movement. construct shoulders of acceptable soil materials, placed in such
quantity to campact to thickness of each subbase course layer. Oanpact and
roll at least a 12-inch width of shoulder simrltanecusly with compacting and
rolling of each layer of subbase course.
Placing: Place subbase course material on prepared subgrade in: layers of
uniform thickness, conforming to indicated cross section and thickness.
Maintain optimum moisture content for compacting subbase material during
placement operations.
• I �� • 1 11
3677 (030191) 8967

When a compacted subbase course is shown to be 6 inches thick or less, place
material in a single layer. Mien shown to be more than 6 inches thick, place
material in equal layers, except no single layer shall be more than 6 inches
or less than 3 inches in thickness vdhen compacted.
BUILDIM SLAB DRAINAGE COURSE:
,
General: Drainage course consists of placement of drainage fill material, in
layers of indicated thickness, over subgrade surface to support concrete
building slabs.
Placing: Place drainage fill material on prepared subgrade in layers of
uniform thickness, conforming to indicated cross-section and thickness.
Maintain optimum moisture content for campacting material during placement
operations.
When a compacted drainage course is shown to be 6 inches thick or less, place
material in a single layer. When shown to be more than 6 inches thick, place
material in equal layers, except no single layer shall be more than 6 inches
or less than 3 inches in thickness vhen compacted.
FIELD QUALITY NNML•
Quality Control Testing During Construction: Allow testing service to inspect
and approve subgrades and fill layers before further construction work is
performed.
Perform field density tests in accordance with ASTM D 1556 (sand cone
method) or ASrM D 2167 (rubber balloon method), as applicable.
Footing Subgrade: For each strata of soil on which footings will be
placed, conduct at least one test to verify required design bearing
capacities. Subsequent verification and approval of each footing subgrade
may be based on a visual comparison of each subgrade with related tested
strata, when acceptable to Architect.
Paved Areas and Building Slab Subgrade: Make at least one field density
test of subgrade for every 2,000 square feet of paved area or building
slab, but in no case less than 3 tests. In each compacted fill layer, make
one field density test for every 2,000 square feet of overlaying building
slab or paved area, but in no case less than 3 tests.
Foundation Wall Backfill: Take at least two field density tests, at
locations and elevations as directed.
If in opinion of Architect, lased on testing service reports and inspection,
subgrade or fills v3hrch have been placed are below specified density, provide
additional compaction and testing at no additional expense.
EARTHWORK 02200 - 9
3677 (030191) 8967

Ibh_\i3lY91N/_WO-M
Protection of Graded Areas: Protect newly graded areas from traffic and
erosion. Keep free of trash and debris.
Repair and re-establish grades in settled, eroded, and rutted areas to
specified tolerances.
Reconditioning Cmpacted Areas: Where canpleted ccnpacte3 areas are disturbed
by subsequent construction operations or adverse weather, scarify surface,
reshape, and compact to required density prior to further construction.
DISPOSAL OF EXCESS AND WASTE MATERIALS:
Removal From Owner's Property: Remove waste materials, including unacceptable
excavated material, trash and debris, and dispose of it off Owner's property.
END OF SEMON 02200
EARTMCW 02200 - 10
3677 (030191) 8967

SECTION 02720 - STORM DRAINAGE SYSTEMS
PART 1 - GENERAL
RELATED DOCUMENTS:
Drawings and general provisions of Contract, including General
and Supplementary Conditions and Division-1 Specification
sections, apply to work of this section.
DESCRIPTION OF WORK:
Extent of storm drainage systems work is indicated on drawings
and schedules, and by requirements of this section.
QUALITY ASSURANCE:
Manufacturer's Oualifications: Firms regularly engaged in
manufacture of storm drainage system's products of types,
materials, and sizes required, whose products have been in
satisfactory use in similar service for not less than 5 years.
Installer's Qualifications: Firm with at least, 3 years of
successful installation experience on projects with storm
drainage work similar to that required for project.
Codes and Standards:
Plumbing Code Compliance: Comply with applicable portions of
National Standard Plumbing Code pertaining to selection and
installation of storm drainage system's materials and products.
Environmental Compliance: Comply with applicable portions of
local Environmental Agency regulations pertaining to storm
drainage systems.
SUBMITTALS:
Product Data: Submit manufacturer's technical product data and
installation instructions for storm drainage system materials and
products.
Record Drawings: At project closeout, submit record drawings of
installed storm drainage piping and products, in accordance with
requirements of Division 1.
8967 STORM DRAINAGE SYSTEMS 02720 - 1

PART 2 - PRODUCTS
IDENTIFICATION:
Underground -Type Plastic Line Markers: Manufacturer's standard
permanent, bright -colored, continuous -printed plastic tape,
intended for direct -burial service; not less than 6" wide x 4
mils thick. Provide green tape with black printing reading
"CAUTION SEWER LINE BURIED BELOW".
PIPES AND PIPE FITTINGS:
General: Provide pipes of one of the following materials, of
weight/class indicated. Provide pipe fittings and accessories of
same material and weight/class as pipes, with joining method as
indicated.
High Density Polyethylene Pipe: AASHTO M-252 (3" - 1011) or AASHTO
M-294 (12" to 3611) Corrugated.
Reinforced Concrete Pipe: ASTM C 76, Class III unless otherwise
indicated.
Joint Material: Fed. Spec. SS-S-210A Sealing Compound
Preformed Plastic for Pipe Joints, Type I, Rope Form.
DRAINAGE STRUCTURES
All drainage structures and accessories shall comply with NCDOT
"Standard Specifications for Roads and Structures, Section 840."
OUTFALLS•
General: Construct of cast -in -place concrete as indicated, with
reinforced headwall, apron, and tapered sides, or precast
concrete flared end sections. Provide rip -rap as indicated to
prevent washout of outfall discharge.
PART 3 - EXECUTION
INSTALLATION OF IDENTIFICATION:
General: During back-filling/top-soiling of storm drainage
systems, install continuous underground -type plastic line marker,
located directly over buried line at 6" to 8" below finished
grade.
8967 STORM DRAINAGE SYSTEMS 02720 - 2

INSTALLATION OF PIPE AND PIPE FITTINGS:
General: Install piping in accordance with governing authorities
having jurisdiction, except where more stringent requirements are
indicated.
Inspect piping before installation to detect apparent defects.
Mark defective materials with white paint and promptly remove
from site.
Lay Piping beginning at low point of system, true to grades and
alignment indicated, with unbroken continuity of invert.
Place bell ends or groove ends of piping facing upstream.
Install gaskets in accordance with manufacturer's recommendations
for use of lubricants, cements, and other special installation
requirements.
Polyethylene Pipe: Install as per manufacturer's recommendations
or ASTM F-449.
Concrete Pipe: Install in accordance with applicable provisions
of ACPA "Concrete Pipe Installation Manual".
Cleaning Piping: Clean interior of piping of dirt and other
superfluous material as work progresses. Maintain swab or drag
in line and pull past each joint as it is completed.
In large, accessible piping, brushes and brooms may be used
for cleaning.
Place plugs in ends of uncompleted conduit at end of day or
whenever work stops.
Flush lines between manholes if required to remove collected
debris.
Joint Adaptors: Make joints between different types of pipe with
standard manufactured adapters and fittings, intended for that
purpose.
Interior Inspection: Inspect piping to determine whether line
displacement or other damage has occurred.
If inspection indicated poor alignment, debris, displaced
pipe, infiltration or other defects, correct such defects,
and reinspect.

DRAINAGE STRUCTURES
Construct drainage structures to sizes and shapes indicated.
Set frames and grates to elevations indicated.
TAP CONNECTIONS:
Make connections to existing piping and underground structures,
so that finished work will conform as nearly as practicable to
requirements specified for new work.
Use commercially manufactured woes for branch connections. Field
cutting into piping will not be permitted. Spring wyes into
existing line and encase entire wye, plus 6" overlap, with not
less than 6" of 3000 psi 28-day compressive strength concrete.
Branch connections made from side into existing 4" to 21" piping
shall have wye sprung into existing line, and entire wye encased
with not less than 6" of 3000 psi 28-day compressive strength
concrete.
For branch connections from side into underground structures, cut
opening into unit sufficiently large to allow 3" of concrete to
be packed around entering connections. Cut ends of connection
passing through pipe or structure wall to conform to shape of and
be flush with inside wall, unless otherwise indicated. On
outside of pipe or structure wall, encase entering connection in
6" of concrete for minimum length of 12" to provide additional
support or collar from connection to undisturbed ground.
Provide concrete which will attain minimum 28-day compressive
strength of 3000 psi, unless otherwise indicated.
Use epoxy bonding compound as interface between new and
existing concrete and piping materials.
Take care while making tap connections to prevent concrete or
debris from entering existing piping or structure. Remove
debris, concrete, or other extraneous material which may
accumulate.
BACKFILLING:
General: Conduct backfill operations of open -cut trenches
closely following laying, pointing, and bedding of pipe, and
after initial inspection and testing are completed. Refer to
Division 2 Section "Earthwork" for requirements affecting
backfill materials and operations.
8967 STORM DRAINAGE SYSTEMS 02720 - 4

FIELD QUALITY CONTROL:
Testing: Perform testing of completed piping in accordance with
local authorities having jurisdiction.
END OF SECTION 02720
coax am^ov nDTYwmnv avemnva

/� n u..,s c.,,� ✓ Co.,H C.y /
- �i/YJ 7 /9 ;
-ne
_IV
AAA
"N"
5 j"ok, w^-Fe r �/T `1 >pA . P"&c
74;7A1, 4ee 4 of Reo J-ccT . //.oZ Ae (4£ol ooa r")
/M i>F e V /ov5 A E-A s
e/J/GO,NC+ /.u<auo.�C- F✓Te�RG /iOn.v)
/8,
775-
FTZ
lQ!<c55 -C Ao$,
4 ?,
Poo
F t
S'pE wA,JZ51 STE �s A% E TR A.✓Gf
(�,
040
FT>
2
70
I I /,
74 r
f i
qr
io /HPtti U/Od$ o� SI rE //2, 745
y
460, r,oc
USE G% SfT>P_/6 DES .SAC G Co 14 GC oe
SvSf
AA e-/!, R-,i .moo.= C2AA S
ELi ti.M/Tb$
usE o. Lon/ /fie -,s/7/ aoT,c/v 7A
�6 Fo+c
use
WET 0a7e 1"01 POI 7-0 474T/S FY
/,EM e-ol"ThL
S 70RM wA TC R- RL,OFF R>eOf rP Er CNTS.
(ZS-rp
Sro/� sr
/ov0 % P,Qe VrOc` �'AGC L Fc�k t, ,OFF F.�'-0M /- /•,
OF /�A-a F/1LL ON / +PEN ✓,od$ S✓/2 Fi1Ct > ( Ir/>cR ✓ro u$ 7o /�-•�),
7QS Fr v '112 x O 95 = 8,5ZG F'T3
I- %t2 x o /S r (27: 060-//2, 746) - Z,OZ0 F73
/o/9S4 F7;
/O/ rS4• F% 3 H,N, SiURAG+L A/30VG TH£ NON MA[
e A7Zh LE ✓tL /I 1�o-O,
7-le7 oG/T.' s>r// e 1•s /0 954 = 7<303 F7
/S
SSYBS oR 6lrK /2Z
Te/ D<v7i of 5-o�n� r z o' /J95-4 = 5,477 r72
L o
r
751K75 oz SZ x /04 `
Rz c, c, k e- ; 5,7 f,, « A, E- A of /0 ,fN
��.., 7-Ee reE 77.,- F,-?e/✓ [",
4%7A,tiAC / Acc/ 70
DE/�TN, 7i 5A/0A, eeop 51, / r7 `
3 o z In 5, 5ov
3 s` / 7 4,675
4 0 / S 41 IZ
4/
60 7a 4/c
GE�GE`
(oQ •r 6C,
62v62
;a:_c

2/7/91 IaL
000
NOO
_r
a e'a
N N N
N N N
o 4 i
F
Nc C-,g7lukey SLcP-EO PiVc L✓r Tr/ /' Su
L/5E dHt,2GE�G c' /3EGow
"04,,4AL- /00i Z A7,-Ek TO PXE ✓EIr 74Pi15ar /jCcua. Z,47101�,
C,R 1Fier-CauA770.,, you �e...5 ovTFLow
VO4 C r -- / 0/ 954 F-f 3
L o ys 24 4- 360o5oc
/�iti D,scyAFtr rAYr �S Lnvs� /v5S4
5 24 3Coo
R�NOGF /N EycESs of /" HAy h'E j)/Ser1Rf UC`i AT ,pRJ-E
NOT EXepEE pi.�[�p 1'2E-Dc uEc-oPE/� Go,..r/�iTio-.i (/oy, sror a•)
USE Ty�L SP/LG f.,�R/ STivG,-tpe
a vc t re 7 D sc./ne c.c /// 0 2 Arc G '%z X D, 3s = Z 3 cps
�oST /%t VELOPE� /%/3G HifkGG =
Z S9�Ic � ,93 2 4G
8 4? Ac 3S = Z 95 Sei
l/ 02 A� /,oa ,99
02 Ac r o 49 3 Z 46 Gi s 32 S Fg
.SSE 67AC, 570A',1 a, e ,ec LA nfJ,., 511 • /� Go.+ PUTt/-' /�i . — r �, 7- Fore
R✓A,cn3L� Po-+o vocunE
5,t, Z, ,-7 4�,/ys,3 1:il,re�7--
MAY cJ uT FLoc,✓ F'r2°i^21SE/-,
IiAx oeTFL�w Qe,L,C(
I*IA>t STAG e 36 07'
23 ef5 iDy.e Srca,
0 05- c66 C� r/ 06)
L 37oe) Tr cr Jcy ri
SCE fc.f;. /-x' j n,c^ s.o. s .1 v L�7,q "s
c F5

SA/DA
-
85%
1'SS REMOVAL
WITH 30'
VEGFTATIVE
FILTER
3
OFT 3
`, T_1
OFT 4
�t"1'
', OFT 5
5FT 6
OFT 6
SFT /
-
OFT
7 `FT
If'1P17R
--
100.
9
8
1 2
1 1
1 0
9
8
7
6
5
200„
l 7
1 3
1 9
1 8
1 6
1 5
1 3
2
1 0
9
300
2
6
2 /I
]
1 9
1 6
]
J 1
l U
4 0'c
1
4 2
S 0
3. 7
2
3 3
3 0
7
2. 4
2 0
1.6
60�
5 0
4 5
3 8
1 5
a]
3 2
3.7
2 9
3 1
2 6
2.9
26 3
2 5
2 1
1 8
70�
6 0
5.2
4 5
7
A 2
3.7
3.2
2 1
2.2
2 0
90%
7.5
6.5
5 2
5 8
5 3
4.8
4 3
2 6
1000
8.2
7.4
6.8
6.2
5.6
5.0
4.4
3.8
3 2
ZA%
20
1.7
1,5'
1.4
),?A
SA/DA
- > 90% TSS
REMOVAL
FOR
WET
DETENTION WITHOUT VEGETATIVE
FILTER
IMPER o 3
OFT
3.5FT
4 OFT 4
5F?
5-OFT 5
5F5 6
OFT 6
5F3 7
OFT
7.5Fi
10%
1 3
2.4
1 0
2.0
.8
1.8
1.7
6
1.5
1.4
1 2
1 0
.9
6
200
300
3 5
3.0
2.7
2 5
2.2
1.9
1 6
1 3
1.1
1.4
8
1 1
400
4 5
4.0
3 5
3.1
2.8
2.5
2 1
2.7
1.8
2.3
1.9
1.5
500
5.6
5 0
4.3
3.9
3.5
3 1
3 4
2.9
2.4
1.9
600
7 0
6.0
5.3
4.8
4.3
3 9
3 4
2 9
2 3
70'
8 1
7.0
6 0
5.5
5.0
4.5
3.9
3 4
2 8
800
9?
8.0
7 0
6 4
5 7
5 2
4.6
4 0
4 6
3 9
3.3
900
10 7
9 0
7.9
7 2
6.5
5.9
5 2
5 1
4 3
3 6
100°,
12 0
10 0
8 8
8 1
7 3
6.6
5 8

Talbert L Fright, ins (BCCAUDT2 uk!)
Pro3e�t No 5101-9006 Enor RDL
Project, WILLiAMSON AUD!TIGFIUM - BCC Date. 15 MAF 91
DETENTION POND ANALISIS
4' Deep Permanent Pool -- Normal Water Level Elev. 33.00
CONTOUR CONTOUP INFF ACCUM, STAGE
AREA VOL VOL (S) (Z) In S In Z Z est
sq, ft, cu. ft. cu. ft ft.
29
3610
0
0
0
30
4371
3991
3991
1 8 291671
0
1.177
31
5352
4862
885.
2 9.08839B
0 693147
2 000
32
6498
5920
14772
3 9 600466
1.0986.2
2 811
33
80!1
7250
22022
4 9 999774
1 386294
3 66b
34
10513
9262
31284
5 10 35084
1.609437
4.630
35
13388
11951
43234
6 10,67438
1 731759
5.742
36
16618
15003
58237
7 10 97227
1.945g10
7.00A
37
20304
18461
76698
8 11.2476'
2 073441
8.407
ESTIMATION OF STAGE STOFAGE RELATIONSHIP
b = (lnfS2/S1))/(!n(Z2/Z1))
Ks = S2/Z2'b
Usino contours 31 and 36
b = 1.50377B
Ks = 3121.469

Talbert A Bn aht, Inc
Pro3ett No. 5101-9006
Pro7e,t. BRUNSWICK COMM
COLL, - AUDITOR:UM
Input Data.
10 Year De5ian Storm
Qp = 32 5 cfs
Tp = 3U min
dT = 4 min.
(BrCAUDT4 Whl)
Env ROL
Date 15 MAP 91
RESULTS.
OUTFLOW PEAK 23 Of` CFS
MAX STAVE. 36 07 FT.
MAY DISCH6GE FROM
WATEP DUAL OUTLET, 0 05 'FS
Staoe-Storaae funrtion.
Ks =31:i 46ti
b = 1.501776
Permanent Pool Normal Elevation 33 00 Ft
In,tial Storaae (Below Perm Por-I Elev.). 22022 Cu. Ft
Bottom of Pond Elev 29.00 Ft
out, et(sI
1 0" Orifice @ Elev 33.06
36" Riser
24" Barrel
(Water Qua a ty Reiease)
(Primary Spillway)
(Primary
Spillway)
Cd = 0.60
Cw = C 30
Cd =
0 60
D = 1 00 in
L = 9 42 ft
D =
24 in.
Zi = 33 00 ft
Zcr = 35.00 ft
Zinv =
32 75 ft
TIME
INFLOW
STOPABE
STAGE
OUTFLOW
I. " orif
36" Riser
15" Barrel
(min )
Q fs'
(Cu. ft l
(iee�)
(rfsl
(cfs)
(05)
(ifs)
------------------------------------------------------------------------------------------------
0
0 00
2202:
3C 00
0.00
0 00
0.00
0.67
4
40
22022
32.67
0 00
0 0(
0 00
EPR
8
5 3S
2235"
32 70
0.00
0 00
0.00
ERP
12
11.23
20650
32.84
0 00
0.00
0 00
0 16
16
17 95
26344
33 13
0 01
0 01
0 00
1.26
20
24.38
30650
33 57
0 02
0.02
0 00
3 9E
24
29 40
36495
34 13
0.03
0 03
0.00
8 E9
28
32.14
43543
34.77
0 u3
0 03
0 00
15 25
32
32 14
51250
35 43
B.eO
0 04
8 75
19.57
36
29.-0
56S54
35 89
22.69
0 r4
26 06
22.09
40
24 '2
56609
36.02
22 86
0 05
32 4S
2 8C
44
20 96
59.17
36 Ol
23 00
0 OS
34 41
23.00
48
17 62
58625
36.02
22.81
0 05
32.54
22 Bi
52
14 82
573BO
35 93
22 31
0.04
27 94
22.31
56
12.4E
55583
35 79
21.55
0 04
21.67
21.55
60
10 4B
53401
35 61
14.77
0 04
14.73
20 59
64
8 81
5236y
35 52
11 79
0 04
11.75
20.11
68
7.41
51654
35.46
9 84
0.04
9 BO
19,77
72
6 23
5106_
35 4i
8 34
0 04
8 36
11.41
7t
5 24
505E:
35 37
7 10
0 J4
7 06
1� :4
80
4,4(
50,16
35 32
6 of
0 04
6 n.
11 0,
84
3.70
447i9
25 10
5.18
0 04
`. 14
16 8'
e6
1'
49364
35.27
4 43
0 Ot
4 3
16 63
3.
2 E2
49047
35 24
3 60
O 04
3 76
IB 46
3t
2
48754
2E 2-
2E
0 04
3.2.
;2

Ta ber. 6 Briaht, Inc (bccaudtl.wkl)
Project No 5101-900E Enar PDL
Project YILLIAMSON AODITOPIOM - BRUNSWICK COMM COLL Date 15 MAP 91
Hydroaraph Formulation b) HPM Step Function
Desion Storm 10 Year
Op (peon flow,
cfs) 3- 5
---------
TD (Tine to
peal, min)
---------
3C
Design t.me
steC (min)
2
Time, m,n
O, rf5
Time, min.
D, c f s
Time, air
O, its
0
0 00
8:
4 04
164
0.:2
2
0, 36
94
3 7(1
16E
0 "
4
1 40
86
3 40
168
0 10
6
3,10
86
3 11
170
0 09
8
S,3B
qrl
2 B6
172
n 18
10
8 13
92
2.62
174
0 ^7
12
1' 23
94
2 4f,
176
0 07
14
14.55
96
2 26
178
0 06
16
17 95
98
2 02
ISO
0 06
18
21 27
10a
i.85
18c
0.05
20
24.38
102
1.70
184
0 05
22
27 12
104
1 56
IB6
0.04
24
29 40
106
1.43
IDS
0.04
26
31.10
WE
1 31
190
0 o4
28
32 14
110
1 20
192
0 fi3
30
3. 50
112
1 10
194
0.0:
32
:,14
114
1 O1
196
0 '11
34
3 11,
116
o 93
19E
0 0l
36
29 40
118
0.85
200
0,uc
38
27.16
120
0 1E
20:
0 r.
40
24 92
122
0 71
204
0 12
42
22 85
124
0 65
20t
0 02
44
20 96
126
0160
208
0. 6:
46
19 2:
128
0 55
2 0
0 (,t
48
17.E2
llu
0 50
212
0.,1
50
16 It
1..
0 4E
214
0 w
52
14 82
134
0 42
216
0 a1
54
13 '1
136
0.3+
21E
0 V.
56
12 46
138
0.36
22(;
0 rl
58
'1 4:
140
0 32
222
O.al
60
10 43
14'
0.30
224
n c1
62
9 61
144
0 26
22E
0 C'
64
8 Si
146
0 25
228
0.v1
6E
5 Oe
146
0 23
Kv
68
7.41
150
0 2!
01
70
6 7,
152
0 13
23,
0161
72
6 23
+54
0 18
236
0 0.
74
: 1,
156
0 1E
236
0 "
76
5 .4
156
n 15
249
0 0('
7E
4 Sf
166
0 '
24-

100
1.85
4K10
35 10
2 80
0 04
2 76
16.18
164
1 56
462E2
35 18
2 41
0 04
2.37
18 06
108
1 31
48079
35 16
2 07
0.04
2 03
17 95
112
1.10
472'36
35 15
1 79
n 04
1.75
17 85
116
6.93
47732
35.13
1.54
0 04
1.50
17.7E
120
ME
47564
35.12
1.33
0 04
1,29
17 68
124
0 65
47452
35 11
1 15
0 04
1 11
17.60
128
0 55
47-2
35.10
1 00
0 04
0.96
17 54
lK
0 46
47224
35 09
0 87
0 04
0.83
17 48
13E
0.39
4712E
35 06
0 75
0.04
0 72
17 42
146
n 33
47,40
35 77
0.66
0 04
0.62
17 37
144
0.28
46it'
35 07
0.57
0.04
0 53
17 32
148
0 23
46890
35.06
0 50
0 04
0 4E
17 24
152
0 15
4EE25
35 OS
0 44
0 04
a 40
17 25
156
0 16
46767
35.05
0.38
0 04
0.35
17.:2
160
0 14
46714
35 05
0 34
0.04
a 30
17 19
164
0.12
46666
35 o4
0 30
0 04
0 26
17 16
166
0 10
46L,
35.04
0 26
0 04
n 23
17 14
172
0 ve
46582
35 03
0 23
0 04
0 20
17 11
176
0 07
46540
35 03
0 21
0 04
0 17
17 of
181,
0 06
465,3
35 03
0.!8
0 04
0.15
17 07
184
0.05
46483
35 O3
0.16
0 04
0,13
17 06
188
0.04
46455
35 02
0 15
0.04
0 1i
17 04
192
0.03
46430
35.02
0.13
0 04
0 09
17 03
196
0,03
46407
35 02
0 12
O.o4
0 08
17.01
200
0.02
46^85
35 02
0 11
0 04
0.07
17 00
204
0.02
46SE5
35 02
0.10
0.04
0 06
16 99
208
0.02
46347
35.01
0.09
0 04
0.05
16.98
211
0 01
4E330
35.01
0 09
0.04
n.04
16 '47
216
0.01
463'S
35 ni
u 07
0 04
e 114
16 9n
226
0 01
46300
35.01
0.07
0 04
O O3
16 a�
224
0 01
4629E
35 01
0 06
0,u4
n 0.
16 34
229
0 01
46:74
35 td
0 06
0 04
0.02
1E,+4
232
0.01
46262
35 01
0 OS
0 04
n 02
16 32
236
0 01
46250
35.01
0.05
0.04
0.01
16 92
240
0 00
46:40
35 00
0.05
0 04
U.n,
16.32
244
0.00
46230
35 00
0 04
0 04
0.01
16 91
248
0.00
46.20
35 00
0 04
0 04
n n0
16 90
252
AM
46211
35 00
0.04
0.04
0.00
16 90
256
0,01)
46202
35 00
0.04
n 04
0 00
16 p
26u
0.90
4E K
35 n0
0 04
0 04
0 00
16 89
264
0 Or
46'8�
35.00
0.04
n 04
0 00
16 88
266
0 00
46176
35,00
0.04
0 04
0100
i6 8E
272
0.00
4E167
35 00
0 04
n 04
0.0o
lE.E7
276
0 00
46.59
35.00
0.04
0.04
n Or,
16 87
280
0 on
4E 50
35 Off
0 04
n 04
u OP
16 96
H4
O.on
4E �l
35 Of)
0.04
0 o4
0,00
16.96
286
0 Oe
4E+32
35.00
0,04
0,04
0100
16 8`
292
n 00
46 _4
34 9i
0 04
11 04
0 00
16.65
196
0.00
4E115
34 99
0.04
0 u
a v0
1t 84
3Ot
0 00
4P A6
34.99
0 04
0.04
0 00
IE 84
364
0 Ot
46^17
34 49
P 64
0 1,4
o uO
1E,81
306
0 u0
46AS
34 99
0.04
0 04
0,00
tt K
312
0 00
4: 3'7
34 yS
O 04
e 04
0 ('1
16 L
36
u01)
4P7
345�
004
n0..
000
!66[
310
i, 0o
Wt�,
34 5,
o,e,
0 i„
11 o0
it E,

324
0 00
46053
34 99
0 04
0 04
0 00
16 81
328
0 00
46044
34.99
0 04
0 A4
0.00
16.80
332
0.00
46035
34.99
0 04
0.04
0 0('
16 80
336
0.00
4602E
34 99
0.0E
0.04
0 00
16 79
340
0 00
46018
34.99
0 u4
0 04
O.Ou
16.79
344
0.00
46009
34 98
0.04
0 04
0 O0
16 78
348
0 00
46000
34 96
0 04
0.04
0.00
16 78
352
0.00
45:91
34 98
0 04
n 04
0 00
16 77
356
0 00
45982
34 98
0.04
0 04
0 00
16 76
360
0 00
45973
34 98
0.04
6 o4
0 n0
16 76
364
0 00
45964
34 98
0 04
0 04
0 00
16 75
368
0 00
45955
34 98
0 04
0.04
0.00
16 75
372
0 00
45947
34 98
0.04
0 04
0 00
16 74
376
0 00
45938
34 98
0 04
0 N
0.00
16 74
380
0 00
45929
34 98
0.04
0 04
0 00
16 73
384
0 00
45920
34 98
O 04
0.04
0.00
16.73
358
0 00
45911
34.99
0 04
0 04
0 00
16 72
392
0.00
45902
34 98
0.04
0,04
0.00
16.72
396
0.00
45B93
34 97
0 04
0 04
0 00
16 71
400
0 Ou
45995
34 97
0.64
0 04
0 00
16 71