SW8960108_HISTORICAL FILE_19960619

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.-
SW_o�4aaoa _ . _ _ _ __
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
7 HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYM M D D

JUN 19 1996
THOMAS ENGINEERING CONSULTANTS, P.A.
203 GLENBURNIE DRIVE
P.O. BOX 1309
NEW BERN, N.C. 28563-1309
[phone]
To: Water Quality Section
DEM -DEHNR
127�Cardinal Drive Extension
Wilmington, N.C. 28405-3845
Attn: Ms. Linda Lewis
Environmental Engineer
Re: Stormwater Project No. SW 8960108
Thompson Apartment Complex
Professional Park
Morehead City, Carteret County
95046
Dear Ms. Lewis:
In response to your comment letter dated May 22, 1996
concerning the referenced project, please find enclosed two
(2) copies of the following:
1) Permit Application (Signed by Owner)
2) Revised Stormwater Plans (5/24/96)
If you have/y questions or comments, please do not hesitate
to call me.�
Sincer ,
Thoma ngi-neering Consultants, P.A.
J45X-F�. �homas , P.E.
cc w/enc1: James I. Phillips
E C E I V E
JUN 191996
D E M
PROJ I
95046_F04 June 17, 1996

State of North Carolina
Department of Environment, Health, and Natural
Wilmington Regional Office
James B. Hunt, Jr. DIVISION OF ENVIRONMENTAL MANAGEMENT
Governor WATER QUALITY SECTION
May 22, 1996
Mr. John Thomas, P.E.
Thomas Engineering Consultants
Post Office Box 1309
New Bern, North Carolina 28560
Resources
Jonathan B. Howes
Secretary
Subject: ADDITIONAL INFO&NIATION .
Stormwater Project No. SW8 960108
Thompson Apartments
Carteret County
Dear Mr. Thomas:
The Wilmington Regional Office received a Stormwater Management Permit Application for
Thompson Apartments on May 2, 1996. A preliminary review of that information has determined that the
application is not complete. The following information is needed to continue the stormwater review:
The application form must be signed by the owner, Ben Thompson. Your name and address
go in the agent authorization. This only authorizes you to submit the stormwater permit
application, on Mr. Thompson's behalf and deal with this Office in getting the permit.
2. The storage area must be collected and routed to the pond.
Please note that this request for additional infonnation is in response to a preliminary review. The
requested information should be received by this Office prior to June 22, 1996, 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 have any questions concerning this matter please feel free to call me at (910)
395-3900.
Siet"�
cerely,
C 4in
Ms. Linda Lewis
Environmental Engineer
DAlarl: S:IWQSISTORMWATIADDINF01960108.MAY
cc: Linda Lewis
Central Files
127 Cardinal Drive Extension. Wilmington. N.C. 28-05-3845 • Telephone: [phone] • Fax [phone]
An Equai Qpponunity Aitirmxiive Aetion Employer

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State of North Carolina
Department of Environment, Health, and Natural Resources
Wilmington Regional Office
James B. Hunt, Jr. DIVISION OF ENVIRONMENTAL MANAGEMENT Jonathan B. Howes
Governor WATER QUALITY SECTION Secretary
February 5, 1996
Mr. John G. Thomas, P.E.
Thomas Engineering Consultants
Post Office Box 1309
New Bern, North Carolina 28560
Subject: ADDITIONAL INFORMATION
Stormwater Project No. SW8 960108
Thompson Apartment Complex
Carteret County
Dear Mr. Thomas:
The Wilmington Regional Office received a Stormwater Management Permit Application for
Thompson Apartment Complex on January 9, 1996. 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. Inspections of the detention pond must occur much more frequently than once a year.
Inspections are required monthly, or after every runoff -producing rainfall event, whichever
comes first. Please revise the Operation and Maintenance Plan to reflect this.
2. Two sets of plans are required for application.
3. A trash rack is required over the orifice and overflow riser.
./ 4. A forebay at the inlet, and a 6:1 vegetated shelf around the entire pond perimeter are
required. See enclosed detail. Add appropriate details for these items to the plans.
J 5. Add a note to the plans concerning the roof drainage. All roof drains must tie into the
stormwater system, or be directed into the parking lot where they can be picked up by the
system.
Z6. I calculate about 400 square feet more sidewalk than you do.
127 Cardinal Drive Extension, Wilmington, N.C. 25405-3945 • Telephone [phone] • Fax [phone]
An Equal Opportunity Atfirmative Action Employer

A
Mr. Thomas
February 5, 1996
Stormwater Project No. SW8 960108
Z7. You use the site area to determine the percent impervious, and the lesser drainage area to
determine the required surface area. Both these calculations must be based on the same area,
either the drainage area or the site area. You cannot interchange the two to achieve the
lowest requirement.
f 8. Please delineate and label the 2,100 square feet of "storage areas" you account for in your
calculations.
v19. Please dimension the permanent pool.
10. If you are going to use the 85 % TSS chart, a vegetated filter must be provided. Please see
the enclosed detail for an example of an acceptable filter design.
V/11. Based on #7 above, the surface area you show at the permanent pool elevation 16, 1,520
square feet, is deficient. The volume provided is also deficient.
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 March 5, 1996, 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 have any questions concerning this matter please feel free to call me at [phone].
S incerely,
A!��1645;r ?e&�
Ms. Linda Lewis
Environmental Engineer
DA/arl: S:IWQSISTORMWATIADDLNI-FO',,960108.FEB
cc: Linda Lewis
Central Files

24 - $tormwaw Control Princibies & Practites — Chow 3 _
Wet ponds can be used to con-
trol runoff from larger contrib-
uting areas than many other
BMPs. However, they take up
larger land areas within devel-
opments due to the increased
storage volume in the perma-
nent pool. If sited and main-
tained properly, they can be at-
tractive features within a devel-
opment, enhance property val-
ues and offer recreation oppor-
tunities. However, ponded wa-
ter can attract children creating
a safetv hazard. The construc-
tion of a shallow safety bench
around the pond or fencing
may be necessary. Construcdon
costs are generally higher than
I P'L pG;L _j4 L urLu.
for dry basins, because of the additional volume required for the permanent pool.
btamn ptams
l f��
i� Yi
Inie[ R'pap
inlet prMOC *n
.t rtxpoar
Embankmem wrM marsh piant�
ano spWway to main pool
l Stormwater Riser prevents
I I o"edio"^rr4 embankment
` l Norrrar r"ageVOUM^e
j >✓ pod level Reverse -snow ore" to
.y I � t �Y pacte4-earsn
r i ,� !i 1 . ,�„ :assess s•.amwatar Corn
waur W'ei \ ernbaniunent
li .1
_ ♦It�S��l !. J' � \ .-Tef.
Man p cooi
Co_=L-e are- Anti -seep
ftmzion a!>GCf CQJLVS
Figure 11: I1-ii Retcntinn Pond - Side CuttarmLa, Vww. (Source: Arnold, et aL 1993)
ia outlet
pmrp•,ectton
f�
�y
Freque-nt maintenance of wet ponds is required and can be costly. Wet sediment is harder and more costly
to remove- Again, easy access is critical to proper rrainteria.-ice. Poor maintena-rice can cause the pond to
fail, and create nuisance odors, insects, algae blooms and unsightly area -
The 'NC Division of Environmcitai Manage--nent requires the use of wet ponds to treat stormwater runoff
in high density developments w-irhin the w-ater-meds of some sensitive water bodies (high quality/outstand-
ing resource waters, etc.,. DE-tii should be consulted on speciuc design and operation and maintenance
requirements. Many local governments also re^,.uire wet ponds within water supply watersheds and should
be contacted for further information. Guilford Courr.; tior-,1 Carolina has ex.e.-isive experience with wet
retention ponds, with over 135 installed since 198�:. Cor.tac: Lce Stimoson, Watershed Protection Engi-
neer at (919; 3 i 3-3"r 84 for more information.
t

VEGETATIVE FILTER
Flow Spreader
Natural or Manmade
4 t 30 or 50 Foot
Veg. 1' liter
jt
'. I�L
--AL
A
40-
0

aabrn 3 — SwTmualer Control Prin blcr ca Practices - 19
DQwMspout Controls - In many cases, down-
spouts from roof gutters are discharged onto
driveways, parking areas and other impervious
surfaces which drain directly to storm sewIers
or streams. Local building codes or ordinances
can require or encourage builders to discharge
downspouts into stabilized vegetated areas
where the runoff can infiltrate. This simple
practice can significantly reduce the genera-
tion of runoff and should be used whenever
possible.
❑ CONTROL MEASURES
DotLn uts Should Be Discharged T Vegetated Areas.
Control measures are structural practices which control the volume and peak discharge rate and/or reduce the pol-
lutant loading of stormwater runofE They uHiizc the procures of detention/retention, settling, percolation, evapo-
ration, evapotranspiration, filtration, adsorption and biological up�ake to reduce flows and remove pollutants. These
practices can be very effective if properly sited, designed, constructed and maintained. Poor maintenance has been
the key reason for the failure of these practices in the past Control measures are generally more land intensive and
expensive than preventive nonstructural measures. They should be considered as components in an integrated
stormwater management system. Four general types of control measures are discussed below including Vegetative
Practices, Infiltration Devices, Detention/Retention Practices, and Other Control Dei ices.
Vegetative Practices
Vegetative practices act as narure's biofilters to reduce stormwater flows and pollution. These practices use
the natural processes of infiltration, filtration and biological uptake to reduce flows and pollutant loadings.
Vegetative practices are popular because they can be attractive and are low in cost relative to other struc-
tural control measures. They can not usually do the entire job of controlling runoff by themselves, but are
an important component of an integrated stormwater control system. Filter strips and grassed waterways
are two good examples of vegetative practices.
• Filter Strips
Filter strips are grass or
forested strips of land
placed between developed
areas and sensitive areas
such as streams, lakes, wet-
lands, estuaries, etc. (Fig-
ure 6). Stormwater is dis-
charged into the filter in a
thin, sheet flow to maxi-
mize infiltration, filtration
and biological uptake by
the vegetation. A level
spreader, such as a stone
trench, is usually needed
to spread the runoff" evenly
and create sheet flow
through the Filter.
Figure 6: Grassed And Forested Filter Strips. (Source: Arnold, a al. 1993.)

THOMAS ENGINEERING CONSULTANTS, P.A.
REC'D V nY 0 219t`
203 GLENBURNIE DRIVE
P.O. BOX 1309
NEW BERN, N.C. 28563-1309
[phone]
To: Water Quality Section
DEM_-DEHNR
127 Cardinal Drive Extension . Wilmington, N.C. 28405-3845 Bill
ATr,,
�
Attn: Ms. Linda Lewis
Environmental Engineer E C E I V E
Re: Stormwater Project No. SW 8960108 D
Thompson Apartment Complex MAY 021996
Professional Park
Morehead City, Carteret County PROS # 5wYI-0alOS
95046
Dear Ms. Lewis:
In response to your comment letter dated February 5, 1996
concerning the referenced project, please find enclosed two
(2) copies of the following:
1) Revised Stormwater Report (Pages 2-4)
2) Revised Stormwater Plans
3) Revised Operation & Maintenance Agreement
I offer the following comments concerning each item per your
letter.
1) Revised the Operation and Maintenance Plan
2) Two sets enclosed
3) Added trash rack
4) Added forebay and vegetated shelf. As a matter of
note, the catch basins have been designed with
grit sumps, which would also trap sediment prior
to entering the pond.
5) Note added
6) Adjusted
7) I disagree with your position concerning this item;
however, for this project, I have modified the
calculations using the same area as you suggested.
8) Delineated on the pond.
9) Done
10) A vegetative filter was shown on the original
plan. A flow spreader has been added to the plan
details.
11) Calculations modified.
95046.F02 April 30, 1996

If you have any questions or comments, please do not hesitate
to call me.. i
Since y,
Tho ngi Osl,P.E.
Consultants, P.A.
G. ho
cc w/encl: James I. Phillips
95046.F02 April 30, 1996

Stormwater Management Plan
For
Thompson Apartment Complex
Professional Park
Carteret County, North Carolina
��� R
95046
0
E C E 1 V E
JAN 091996
PROJ # 5r,�8�vrv�
Owner: Benjamin E. Thompson
254 Forsyth Medical Park
Winston-Salem, N.C. 27103
[phone]
Land Surveyor: James T. Phillips RLS & Associates
P.O. Box 3492
Morehead City, N.C. 28557
Consulting Engineer
December 8,.1995
Thomas Engineering Consultants,
203 Glenburnie Dri
P.O. Box 1309
New Bern, N.C. 285
[phone]
,�r�RINQ �Q*
SEAL
•.H�Ag.
l983

r
CONTENTS
Stormwater Permit Application
Application Fee
Operation & Maintenance Agreement
Vicinity Map
Supporting Calculations
Exhibits
Seeding Specifications
95046.R01 12/08/95
Page 1

MANSFIELD QUADRANGLE
NORTH CAROL] NA—CART.ERET CO.
7,5 MINUTE SERIES (TOPOGRAPHIC) p
47'30" 337 �,670000 Fl-(71 139 76'45'
34*45'
iei VE, 1i
j
370000
-7 FEET
23
L
MANSI-14VL
3845
y.
vc u
g
4"
r, Daibe6con
INTRACOASTALWallace'--lyi,
o Daybeacoh-,f, WA TER WA
Dofphiris'?,
f
"42
42130"
Pile 2
CC= X4
�—�w 0 s
-------- 3841
..........

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S
Q E C E I V E
MAY 0 21996
SUPPORTING CALCULATIONS
D E M
PROJ .#
A. Site Data
1) Total Site.................................64,699 sf
2) Built -Upon Area
a) Parking .............................. 14,070 sf
b) Buildings ............................ 15,407 sf
c) Storage Areas ........................ 2,357 sf
d) Sidewalks ........................... 2,000_sf
TOTAL 33,834 sf
3) Percent Built upon: 33,834 sf = 5201
64,699 sf
B. Determination of Wet Detention Pond Surface Area
1) Reference Attachment "A"
2) Proposed Pond Depth: 4.0 ft
3) Imperious Percent: 520-.
4) Drainage Area: 64,699 sf
5) Surface Area/Drainage Area: 3.4% (Interpolated from
attachment "A")
Where:
Impervious % = 520
Permanent Pool = 4.0 ft
6) Pond Surface Area:
a) 64,699 sf X 0.034 = 2200 sf
b) Suggested pond surface area (SA)= 2200 sf
C. Determination of required storage following a one inch
rainfall event:
where C for building roofs = 1.0
paved areas = 0.9
green areas = 0.2
95046.R01 Revised 04/30/96
Page 2

1) Building Roofs
(15407sf)(1.0)(1 inch)(1 ft / 12 inch)=1284cf
2) Paved Areas
(15,670sf)(0.9)(1 inch)(1 ft / 12 inch)=1175cf
3) Green Areas
(25923sf) (0.2) (1 inch) (1, ft/ 1.2 inch) = 432cf
4) Storage Depth (1 inch rainfall)(h)
H=Volume/SA
H=2891cf/2000sf = 1.3 ft
H=1.3ft
D. Draw down determination
1) Q (2 dys)=2891cf/ (2 dys) (24hrs/dy) (60min/hr)
(60/sec/min)=0.016cfs
2) Q (5 dys)=2891cf/ (5 dys) (24hrs/dy) (60min/hr)
(60/sec/min)=0.0067cfs
3) Orifice Size
a) Orifice Formula
Area = [Q/Cd divided by the square root of (2gh)]
x 144sgin/sf
Where h = H/2
Cd = 0.6
g = 32.174ft/sec 2
b) Area for Q (2dys)
Area = (0.0167cfs/0.6 divided by the square root
of(2g 0.75ft)(144sgin/sf)
Area = 0.58 sq in
Pipe Dia = 2 divided by the square root of 0.58/Pi
=0.86 in (7/8in)
c) Area for Q (5dys)
Area = (0.0067cfs/0.6.divided by the square root
of(2g 0.75ft)(144sgin/sf)
Area = 0.23 sq in
Pipe Dia = 2 divided by the square root of 0.23/Pi
=0.54 in (9/16 in)
d) Selected Orifice Size
Use 3/4 in orifice
95046.R01 Revised 04/30/96
Page 3

E. Runoff calculation for riser sizing and overflow:
1) Rational Method Q=CIA
Where Q = Peak rate of runoff (cfs)
C = Runoff coefficient
Building Roofs = 1.0
Paved Areas = 0.9
Green Areas = 0.2
I = Average intensity of rainfall (inches)
(10yr)
A = Drainage area (acres)
2) Determination of Peak Flow Q
C = 15407sf) (I.0)+(15670) (0.9)+(25923) (0.2)
57000
C= 0.61
H (Height difference)=2ft
L (length of travel)= 500ft
Tc (time of Conertractor) = 2 min
i
10
Q = CIA
Q = (0. 61) (6. Oin) (1.3085ac) = 5.6 cfs
F. Outlet Pipe & Riser Determination
Given: Q = 5.6 cf
Slope = 0.10
Use 18 in dia pipe w/24" riser
95046.R01 Revised 04/30/96
Page 4

PROFESSIONAL APARTMENTS
Worksheet for Circular Channel
Project Description
Project File
c:lhaestadlfmwlaptsa.fm2
Worksheet
PIPE OUT " RoN 14 It
Flow Element
Circular Channel
Method
Manning's Formula
Salve For
Full Flow Slope
Input Data
Mannings Coefficient 0.024
Diameter 18.00 in
Discharge 5.60 cfs
Results
Channel Slope
0.009688 ft/ft
Depth
18.0
in
Flow Area
1.77
ftz
Wetted Perimeter
4.71
ft
Top Width
0.00
ft
Critical Depth
0.91
ft
Percent Full
100.00
Critical Slope
0.020558 ft/ft
Velocity
3.17
ft/s
Velocity Head
0.16
ft
Specific Energy
FULL
ft
Froude Number
FULL
Maximum Discharge
6.02
cfs
Full Flow Capacity
5.60
cfs
Full Flow Slope
0,009688 ft/ft
12/12195 FlowMaster v5A 1
09:18:07 PM Haestad Methods, Inc. 37 Brookside Road Waterbury, OT 06708 [phone] Page 1 of 1

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PROFESSIONAL APARTMENTS
Worksheet for Trapezoidal Channel
Project Description
Project File
6haestadlfmwlaptsa.fm2
Worksheet
OUTLET CHANNEL —
Flow Element
Trapezoidal Channel
Method
Manning's Formula
Solve For
Channel Depth
Input Data
Mannings Coefficient
0.030
Channel Slope
0,003000 ftfft
Left Side Slope
3.000000 H : V
Right Side Slope
3.000000 H : V
Bottom Width
5.00 ft
_. Discharge
5.60 efs
Results
Depth
0.55
ft
Flow Area
3.63
ft2
Wetted Perimeter
8.46
ft
Top Width
8.28
ft
Critical Depth
0.32
ft
Critical Slope
0.020608 ftfft
Velocity,
1.54
fus
Velocity Head
0.04
ft
Specific Energy
0.58
ft
Froude Number
0.41
Flow is subcritical.
12/13W HoWasler v5.71
08:S6:12 AM Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 0570E [phone] Page t of i

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OUTLET CHANNEL
Cross Section for Trapezoidal Channel
Project Description
Project File c:lhaestadlfmwlaptsa.fm2
Worksheet OUTLET CHANNEL -- 1JC 6E'7A7'iVe r= . (fe2
Flow Element Trapezoidal Channel
Method Manning's Formula
Solve For Channel Depth
Section Data
Mannings Coefficient
0.030
Channel Slope
0.003000
ft/ft
Depth
0.55
ft
Left Side Slope
3.000000
H : V
Right Side Slope
3.000000
H : V
Bottom Width
5.00
ft
Discharge
5.60
cfs
5.00 ft
12/13/W
08:54:37 AM Haestad Methods. Inc. 37 Brookside Road Waterbury, CT 06706 (203) 755i-1666
0.55 ft
1
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NTS
FlowMaster v5.11
Page 1 of 1
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3 C. T
3 5 TT
4 'FT
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if) FT 5
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6 CFI'
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9
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3.7
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SA/DA - > 90% TSS RF2A-OVAL
--FIR WET DETENTION WITHOUT VEGETATIVE FILTER
w IirER.% 3 OFT 3 �T 4 OFT 4.5FT 5 OFT S 5F" 6 0FT 5 SFT 7 QFT 7 ^F'
:. _100 1.3 =1 0 8, -_ ... '6,.,._. .S .4 - 3 2- _ -
20$� E2 .4 -2 0 =1 8 ~�:1.7 =1.5 i.4 1.2
_ -:30% 3. 5 0 2:7 °= =2. -2.2 - _3 �9 --_3.6
- 4O% 54 _: 0 3 .-5 `3 : Z l2 : 82 : S Z 1I 8 --_Z 4_
- .�.50 5:6�5 04 3 3:9 T3.5=3 . 1 `2.7 -2:31 9 . 5 - -
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��C 4. 5 -- 3 .9 3.-:4 _2 9 -3
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�90$.I0�7g .:05 r9 ._ _5.2 = 4-6 -. 9
mac, wa. i...-•.--•' ..r-.rc� _ - .'!--
��.2 . c� 13 : 0 _ 8 8 �8 : 7 3 L6 6 ; Y 5 ..g 5 1 r 4 3 3 6
��• 's�.'i�•cs`�-dln.av`av-�'.�efars '�`r=�c-.-'.-�-�.fi -a�- ���-'s-_- _ =. .a_--.�--i'�c--_�'�==
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0
a)
a�
M
O
L
tT
C
W
E
E
X
Ca
■�
Note:
Use nomograph Tc for natural basins with well-defined channels, for overland
flow on bare earth, and for mowed -grass roadside channels.
For overland flow, grassed surlaces, multiply Tc by 2.
For overland flow, concrete or asphalt surfaces, multiply Tc by 0.4.
l'w rYsncwte chansiel!;, inuHi{rly I (: by 0.P
I-Iflore 0.0341 iun, of I,�n,v:nlr,ilinn ul:trn.:A cf'.1w.opi
I,:(fiIfrj)
Nnn
100
50
10
5
1

A pp(!irdrr'c.V
I wIlllllllf�lllf 1 '
.S
08
04
----
02
5
10
20 40 60 2 3 4 6 8 12 18 24
Minutes Hours
Duration
Figure 8.03b Rainfall intensity duration curves—Wilrningtor,.
r
Figure 0.03c f tan&.111 il,h:rraly,l r .,i,. 11,11,
8.0.1.5

Thompson Apartment Complex
Professional Park
SECTION 02930
SEEDING AND MULCHING
PART 1 GENERAL
1.1. DESCRIPTION
12/08/95
95046.501
A. Work included: The work covered by this section of the
specifications consists of furnishing all labor,
equipment, and supplies, and performing all operations in
connection with seeding and mulching in strict accordance
with this section of the specifications and the applicable
drawings, and subject to the terms and conditions of the
contract.
B. Related Work:
1. Documents affecting work of this Section include, but
are not necessarily limited to, General Conditions,
Supplementary Conditions, and Sections in Division 1
of these Specifications.
A.2 SUBMITTALS
A. Seed: The Engineer shall be furnished with four (4)
signed copies of a statement from the vendor certifying
that each container of seed
delivered is fully leveled in accordance with the Federal
Seed Act and is at least equal to the requirements for
seed as herein specified. This certification shall
appear on or with all copies of invoices for the seed.
Each lot of seed shall be subject to sampling and testing
at the discretion of the Engineer. Sampling and testing
will be in accordance with the latest rules and
regulations under the Federal Seed Act.
B. Fertilizer and Lime: The Engineer shall be furnished with
four (4) copies of invoices for all fertilizer and lime
used on the project. Invoices for fertilizer shall show
the grade furnished. Invoices for lime shall show total
minimum carbonates and minimum percentages of the material
furnished that pass the 100, 20, and 10 mesh sieves. Each
lot of fertilizer and lime shall be subject to sampling
and testing at the discretion of the Engineer. Sampling
and testing will be in accordance with the official
methods project, a final check of the total quantities of
SEEDING AND MULCHING
02930-1

Thompson Apartment Complex
Professional Park
12/08/95
95046.S01
fertilizer and lime used will be made against the total
area treated, and if the minimum rates of application have
not been met, the Engineer may require the distribution of
additional quantities of fertilizer and limes to make up
the minimum rates of application specified.
1.3 QUALITY ASSURANCE
A. Use adequate numbers of skilled workmen who are thoroughly
trained and experienced in the necessary crafts and who
are completely familiar with the specified requirements
and the methods needed for proper performance of the work
of this Section.
B. Use equipment adequate in size, capacity, and numbers to
accomplish the work of this Section in a timely manner.
C. In addition to complying with requirements of governmental
agencies having jurisdiction, comply with the directions
of the soil engineer.
1.4 SEQUENCING AND SCHEDULING
A. Planting Time: A ground cover sufficient to restrain
erosion must be provided within 15 working days or 60
calendar days, whichever is the shorter period, of
completion of any grading or Bound disturbance. The
planting time for permanent seeding shall be 1 March
through 15 October. Planting time for temporary seeding
shall be in accordance with TEMPORARY SEEDING. Any
changes to the planting time or to the seed mixtures must
have prior approval of the Engineer. The Contractor shall
be responsible for the protection of earth slopes and
damage thereto shall be repaired, as required, prior to
seeding.
1.5 MAINTENANCE
A. The Contractor shall maintain the seeded and mulched areas
until all work, designated portions thereof, have been
completed and accepted. Maintenance shall consist of
providing protection against traffic by warning signs or
barricades, repairing any areas damaged as a result of his
own operations and erosion, and mowing to a height three
(3) inches when weeds of other vegetation tend to shade or
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02930-2

Thompson Apartment Complex 12/08/95
Professional Park 95046.501
smother the new seedlings. Seeded areas will be
considered established and satisfactory when the new
growing sproutes are visible at the surface showing not
less than nine (9) seedlings at least 2 inches long in
each square foot..
B. The Contractor shall be responsible for the proper care
(maintenance) of the seeded and mulched areas until a
satisfactory cover of growing grass is visible as
specified above. During this establishment period, it
will be the responsibility of the Contractor to repair
soil washes and reseed and remulch unsatisfactory areas.
All costs and charges in connection with work and
materials necessary for maintenance and establishment of
the grass, including soil for repairs, shall be borne by
the Contractor and at no additional expense to the OWNER.
The establishment period shall extend until conditional
acceptance and/or final acceptance in conformance with the
requirements of General conditions. Seeded areas not
showing satisfactory growth at the surface thirty (30)
days after planting shall be reseeded unless additional
establishment time is approved.
PART 2 PRODUCTS
2.1. MATERIALS - SEED
A. Seed shall be labeled in accordance with U.S. Department
of Agriculture rules and regulations under the Federal
Seed Act in effect on the date of the invitation for Bids.
Seed which has become wet, moldy, or otherwise damaged in
transit or in storage will not be acceptable.
Purity
Seed for all areas shall meet the minimum percentage
purity in each lot of seed as shown below.
Kind of Seed
Sudan Grass
Tall Fescue
Bermuda, common-unhulled seed
Bahia, Pensacola
Lespedeza, Common (unscarified seed)
Lespedeza, Sericea (unscarified seed)
Kentucky Bluegrass
SEEDING AND MULCHING
02930-3
MinimumPercentage
98
97
97
72
97
98
85

Thompson Apartment Complex
Professional Park
12/08/95
95045.S01
Rye Grain 97
Note: weed seed not to exceed I percent.
B. Fertilizer shall be 8-8-8 commercial mixed grade, uniform
in composition, free flowing, and suitable for application
with approved equipment, delivered to the site in bags or
other convenient containers, each fully labeled,
conforming to the applicable State fertilizer laws, and
bearing the name or trademark and warranty of the
producer.
C. Lime shall be ground limestone containing not less than 85
percent of total carbonates and shall be ground to such
fineness that 100 percent will pass through a No. 10 mesh
sieve and at least 90 percent will pass through a 20 mesh
sieve, and 50 percent will pass the No. 100 sieve.
Coarser materials will be acceptable provided the
specified rates of application are increased
proportionately, on the basis of quantities passing the
100 mesh sieve, but no additional payment will be made for
the increased quantity.
2.2. MATERIALS - MULCH
A. Mulch material which contains an excessive quantity of
matured seed of noxious weeds or other species which would
grow and be detrimental to the development of grasses will
not be acceptable. Straw or other mulch material which is
fresh and excessively brittle or which is in such advanced
stage of decomposition as to smother or retard the growth
of grass will not be acceptable. Mulch shall be any of
the following materials:
1. Straw: Straw shall be threshed straw of oats, wheat,
rye, beans or peanuts.
2. Hay: Hay shall be such types as native hay or
broom sedge hay.
3. wood cellulose fiber mulch: For use with the
hydraulic application of grass seed and fertilizer,
shall consist of specially prepared wood cellulose
dyed an appropriate color to facilitate visual
metering of application of the materials. The mulch
material shall be supplied in packages having a gross
weight not in excess of 100 pounds. The wood
cellulose fiber shall contain not in excess of 10
SEEDING AND MULCHING
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Thompson Apartment Complex
Professional Park
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95046.S01
percent moisture, air dry weight basis. The wood
cellulose fiber shall be manufactured so that after
addition and agitation in slurry tanks with
fertilizers, grass seeds, water, and any other
approved additives, the fibers in the material will
become uniformly suspended to form a homogeneous
slurry; and that when hydraulically sprayed on the
ground, the material will form a blotter -like ground
cover impregnated uniformly with grass seed; and
which, after application, will allow the absorption of
moisture and allow rainfall or mechanical watering to
percolate to the underlying soil suppliers shall be
prepared to certify that laboratory and field testing
of their product has been accomplished, and that their
product meets all the foregoing requirements based
upon such testing.
B. Bituminous adhesive material: for anchoring of mulch
shall conform to one of the following types and shall be
non -toxic.
1. Asphalt emulsion - Fed Spec SS-A-674, Type 12 s-1.
2. Cutback Asphalt - Fed Spec SS-A-671, designation
Rc-70, MC-30, and MC-70.
2.3 Mixes - Seed - (permanent Seeding)
A. All areas except around buildings.
1. Seed mixture; planting period: Year around
0
Kind of Seed
Tall Fescue (Ky. 31 var.)
Bermuda, common-unhulled seed
Bahia, Pensacola var.
Centipede
Total
Min. lbs. per acre
50
20
50
5
125
2. On slopes 4:1 and steeper, Lespedeza Sericea will be
added to above mixtures at rates of 35 lbs. per acre.
Around buildings
Kind of Seed
Tall Fescue (Ky. 31 var.)
SEEDING AND MULCHING
02930-5
Min. lbs. per acre
100

Thompson Apartment Complex
Professional Park
12/08/95
95046.501
2.4 EQUIPMENT - HYDRAULIC - PERMANENT SEEDING - (Optional)
A. General: In lieu of distributing fertilizer, seed and
mulch in separate operations as provided hereinbefore, the
Contractor has the option of combination of fertilizer,
seed and mulch.
B. Seeder: Equipment to be used for applying a
seed -fertilizer mix over prepared slopes shall be a
hydraulic seeder designed to pump and discharge a
waterborne homogeneous slurry of seed, fertilizer, and
wood cellulose fiber at the desired specified rate. The
seeder shall be equipped with a power -driven agitator, and
shall be capable of discharging up to 200 gallons per
minute at 100 pounds pressure from a nozzle with clearance
for 1/2 inch solids.
C. Wood cellulose fiber mulch spreader: Hydraulic equipment
used for the application of fertilizer, seed, and slurry
of prepared wood pulp shall have a built-in agitation
system with an operating capacity sufficient to agitate,
suspend, and homogeneously mix a slurry containing up to
40 pounds of fiber plus a combined total of 70 pounds of
fertilizer solids
for each 100 gallons of water. The slurry distribution
lines shall be large enough to prevent stoppage. This
discharge line shall be equipped with a set of hydraulic
spray nozzles that will provide even distribution
of the slurry on the various slopes to be mulched. The
slurry tank shall have minimum capacity of 1000 gallons
and shall be mounted on a traveling unit which may be
either self propelled or drawn by a separate unit that
will place the slurry tank and spray nozzles near the
areas to be mulched so as to provide uniform distribution
without waste. The Engineer may authorize equipment with
smaller tank capacity provided that the equipment has the
necessary agitation system and sufficient pump capacity to
spray the slurry in a uniform coat over the surface of the
area to be mulched.
PART 3 - EXECUTION
3.1 SURFACE CONDITIONS
A. Examine the areas and conditions under which work of this
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' yrr;i
Thompson Apartment Complex
Professional Park
12/08/95
95046.S01
Section will be performed. Correct conditions detrimental
to timely and proper completion of the Work. Do not
proceed until unsatisfactory conditions are corrected.
3.2 PREPARATION OF SEEDBED - PERMANENT SEEDING
A. General: The areas to be treated and their respective
requirements for seed, fertilizer, lame, and other
treatment shall be as indicated on the drawings and/or as
specified herein. Equipment necessary for the proper
preparation of the ground surface and for handling and
placing all required materials shall be on hand, in good
condition, and shall be approved before the work is
started. The contractor shall demonstrate to the Engineer
before starting work that the application of the materials
required will be made at the specified rates.
B. Clearing and cleanup of seedbed area: Prior to tillage
operations in graded areas, the surface shall be regraded
as may be required to restore any eroded or unsuitable
surface; vegetation on the site, if any, that might
interfere with tillage or seeding operations shall be
mowed, raked, and burned or removed from the site. Also,
prior to or during tillage operations, ground surfaces to
be seeded shall be cleared of stumps, roots, cable, wire,
grade stakes, and other materials that might hinder proper
tillage, seeding or subsequent maintenance operations.
C. Tillage: In the graded areas, tillage shall consist of
discing, scarifying or otherwise loosening the soil to a
minimum depth of 4 inches. Clods shall be broken and the
soil worked into a satisfactory seedbed by discing,
harrowing, or other suitable methods. Slope surfaces upon
which power tillage equipment cannot operate shall be
grooved or punctured by hand or other suitable means so as
to provide small pockets, ridges, or trenches in which
seeding materials can lodge. Tillage or the preparation
of the seedbed shall not be done when the soil is frozen,
extremely wet, or otherwise in an unfavorable working
condition.
3.3 APPLI.CATION - FERTILIZER AND LIME - PERMANENT SEEDING.
A. Application of Fertilizer: Fertilizer,shall be
distributed uniformly at a rate of 1,200 pounds per acre
over the areas to be seeded and shall be incorporated into
the soil to a depth of at least 4 inches by discing,
harrowing, or other acceptable methods in grades areas.
SEEDING AND MULCHING
02930-'7

Thompson Apartment Complex
Professional Park
12/08/95
95046.501
The incorporation of fertilizer may be a part of the
tillage operation specified above. Distribution by means
of an approved seed drill equipped to sow seed and
distribute fertilizer at the same time will be acceptable.
B. Application of lime: Immediately following or
simultaneously with the incorporation of fertilizer, lime
shall be distributed uniformly at a rate of 2000 pounds
per acre over the areas to be seeded and shall be
incorporated into the soil to a depth of at least 4 inches
by discing, harrowing, or other acceptable methods in the
graded areas. The incorporation of the lime along with
the fertilizer may form a part of the tillage operation
specified above.
C. Leveling: Depressions or irregularities in the surface
resulting from tillage, fertilizing, liming, or other
operations shall be leveled before seeding operations are
begun except in ungraded areas where the condition of the
surface and soil would make this operation impraticable.
3.4 APPLICATION - SEED - PERMANENT SEEDING
A. General: All seeding work shall be accomplished using the
proper seed mixture, during the planting periods listed
below, except as otherwise directed, in writing, by the
Engineer. A satisfactory method of sowing shall be
employed, making use of approved mechanical powerdrawn
drills or seeders, mechanical handseeders, or other
approved methods. When drills are used, provision shall
be made by markers or other means to assure that the
successive seeded strips will overlap or be separated by a
space no greater than the space left between the rows
planted by the equipment being used. When delays in
operations carry the work beyond the most favorable
planting period for the species designated, or when
conditions are such, by reason of drought, high winds,
excessive moisture, or other factors, that satisfactory
results are not likely to be obtained, the work will be
stopped by the Engineer and shall be resumed only when
directed. If inspection, during seeding operations or
after there is a show of green, indicates that strips
wider than the space between the rows planted have been
left unplanted, or that other areas have been skipped, the
Engineer may require the sowing of additional seed on
these areas.
SEEDING AND MULCHING
02930-8

r:
mt_

Thompson Apartment Complex
Professional Park
12/08/95
95046.501
B. Drill seeding shall be done with approved equipment with
drills not more than 10 inches apart. The seed shall be
sown uniformly over the designated areas. The seed shall
be sown to an average depth of 1/4 inch and at the rate
specified. Sloped surfaces shall be sown with the drill
moving perpendicular to the slope. Broadcast seeding by
use of distributors such a a "Cyclone" seeder will be
permitted only as specifically authorized by the Engineer.
3.5 APPLICATION - MULCHING
A. All areas shall be uniformly mulched in a continuous
blanket immediately following seeding operations. Mulch
shall be spread at a rate of 1 1/2 tons to the acre. It
is intended that mulch shall allow some sunlight to
penetrate and air to circulate, at the same time shading
the ground, reducing erosion and conserving soil moisture.
The thickness of the covering shall be adequate to hold
the soil but sufficiently loose and open to favor the
development of grass.
B. Immediately following the spreading of the mulch, the
material shall be anchored to the soil by means of a seed
drill, cultipacker, disc harrow set to cut only slightly,
or other suitable equipment which will secure the mulch
firmly and prevent loss or bunching by wind or rain, or
may be anchored with string lines placed at sufficient
intervals. On slopes where machinery cannot be used,
mulch may be retained in place by hand spading, string
lines, or other approved means which will not be
detrimental to subsequent maintenance. Upon completion,
the surface of the mulched areas shall be reasonably
smooth and free from clods of earth, bumps or waterholding
pockets.
C. On slopes 4:1 or steeper, the mulch shall be further
anchored in place by the application of emulsified asphalt
or cut -back asphalt of the types SS-1 or Rc-70, MC-30 and
MC-70, respectively, and shall be non -toxic to the growth
of grass. The bituminous material shall be applied at the
rate of 0.2 to 0.4 gallons per square yard by an approved
method of pressure distribution. The application of the
bituminous adhesive may be part of the mulching operations
if an approved mulching machine is used which is equipped
to coat and distribute the mulch simultaneously.
SEEDING AND MULCHING
02930-9

C IOW A

Thompson Apartment Complex 12/08/95
Professional Park 95046.501
3.6 APPLICATION - HYDRAULIC EQUIPMENT
A. Fertilizer shall be distributed at the rate of 6000 pounds
per acre and incorporated to a depth of at least three (3)
inches as specified herein. Additional fertilizer at the
rate of 600 pounds per acre shall be distributed
simultaneously with the seed using an approved seeder.
B. The distribution and rate of application of lime shall
conform to the requirements as specified herein.
C. Seeds and mulch. the combination of seeds and rates of
application shall conform to the requirements as specified
herein.
The wood cellulose fiber mulch shall be applied at the
rate between 1000 and 1200 pounds per acre in the mixture
of seed and fertilizer.
D. Maintenance and establishment shall conform to
requirements hereinbefore specified.
3.7 TEMPORARY SEEDING
A. General: The work covered by this paragraph consists of
the seeding of selected areas in advance of the permanent
seeding and mulching operations so as to minimize erosion
of grade areas during construction operation. Temporary
seeding shall be considered as a supplement to and not as
a substitute for the requirements for the control of
erosion and saltation provided in other sections of the
specifications. The work shall include preparing
seedbeds; furnishing, placing, and covering fertilizer and
seed; and any other operations necessary for the seeding
of the required areas; all in accordance with these
specifications.
B. Temporary seed location and planting time: The work of
temporary seeding shall be done promptly at the locations
and times directed by the engineer. Temporary seeding
shall be done under any or all of the following conditions
as directed by the Engineer.
1. When it is impossible or impratical to bring an area
to final line, grade, and finish so that permanent
seeding and mulching operations can be performed
without subsequent serious disturbance by additional
grading;
2. When erosion occurs or is considered to be
SEEDING AND MULCHING
02930-10

Thompson Apartment Complex
Professional Park
12/08/95
95046.501
potentially substantial on areas of graded roadbed
where construction operations are temporarily
suspended;
3. During seasons of the year when permanent seeding
and mulching is prohibited by these specifications.
4. When an immediate cover would be desirable to
minimize erosion, siltation, or pollution on any area.
C. Fertilizer shall be applied at the rate of 800 pounds and
seed at the rate of 125 per acre.
D. Seed: Sudan grass shall be used in summer months and Rye
Grain during the remainder of the year. The Engineer will
determine the exact dates for using each kind of seed.
E. Lime: the Contractor may add the lime required for
permanent seeding during this operation, provided the area
on which temporary seeding is being done is to final line
and grade. Compensation for the lime will be made when
the permanent seeding is done on this area.
F. Seedbed preparation: Areas to be seeded shall be loosened
to the depth directed by the Engineer but in no case
greater than 4 inches. The required depth will depend on
the soil conditions and topography of the seedbed. The
entire surface to be seeded will have adequate furrows,
ridges, with reasonable assurance that the materials will
not be easily displaced by wind, rain, or surface runoff.
G. Applying and covering fertilizer and seed: The rates of
application of fertilizer and seed shall be as herein
specified. No fertilizer or seed shall be applied when
the the Engineer determines that conditions are
unfavorable for such operations. The fertilizer or seed
shall be distributed uniformly over the seedbed at the
required rates of applications. Fertilizer and seed shall
be covered or left uncovered, as directed by the Engineer.
If covering is required, it shall be to the degree
acceptable to the Engineer for the prevention of
displacement by wind, rain, or surface runoff.
3.8 FIELD QUALITY CONTROL
A. The Contractor shall establish and maintain quality
control for seeding operations to assure compliance with
contract requirements and maintain records of his quality
SEEDING AND MULCHING
02930-11

4 14A;'
Thompson Apartment Complex 12/08/95
Professional Park 95046.S01
control for all operations including but not limited to
the following:
1. Clearing and Cleanup of Seedbed Area
2. Tillage
3. Application of Fertilizer and Lime
4. Leveling Seedbed.
5. Seeding
6. Mulch Properly Placed and Anchored
7. Satisfactory stand of grass. Coverage of the planted
species at the end of the maintenance period and
maintenance procedures shall be in accordance with the
specifications.
B. A copy of the quality control records and test reports, if
required, as well as corrective action taken, will be
furnished the Owner as directed by the Engineer.
0
END OF SECTION
SEEDING AND MULCHING
02930-12

FROM 313 636 3448
THOMAS EIJG 1 P 1EERS APR . 1 c. 36 6: 1 S All P. o c 1
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03 Glanbur•rlic Drive
P.U. ]fox 1309
New Bern, NCireh Caiolina 26560
(919) 1637-2727
Fay, Nuribcr - '[phone]
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Consulting Engineers - Construction Staking - Planners
203 Glenburnie Drive
P.O. sox 1309
New Bern, North Carolina 28560
(919) 637-272,7
Fax Number - [phone]
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FROM 919 636 2448 THOhHA9 EIG IHEERS MAR . 21 •96 6 : 05 PM P • 001
THOMAS ENGINEERING CONSULTANTS, P . A - JOHN G . THOMAS, P.E.
Consulting Engineers - Construction Staking - Planners
203 Glenburnin Drive
P.O. Box 1309
New Bern, North Carolina 285GO
[phone]
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