20050675 Ver 1_More Info Received_20071015

Blackburn Consulting Engineering
234 East Main Street
Clayton, NC 27520
Phone: [phone]
Fax: [phone]
COVER SHEET
To: North Carolina Division of Water Quality
Attention: Cyndi Karoly
Date: October 9, 2007
From: Danny Blackburn
Subject: Moss Creek Village Business Park
Message:
An approval for Moss Creek Village Business Park (Project #OS-0675) was issued on
July 10, 2007. Item 8 of the approval conditions required additional information for the
proposed level spreader. This information is being provided in response to that
requirement.
Enclosed are:
1) Five copies of level spreader plan.
2) Two copies of drainage calculations.
3) One level spreader Operation & Maintenance Agreement
4)~~'.. level spreader worksheet with attached pictures.
Thank you,
~ ~~~~ !J
D
ocT ~ ~ Zoos
UEw~ - wqr~~ cwAUrr
~~ A1ND SrpR-`q~u~,~ g~ANCh

DWQ Project No. t~ JP ' d ~7 "J
DIVISION OF WATER QUALITY -LEVEL SPREADER WORKSHEET (112007)
I. PROJECT INFORMATION (please complete the following inforn
Project Name : />') o5S e+~El~ IJIlU4 ~E
Contact Person: DA W 1 t'L g Li4~K.C3r. Q~
Level Spreader ID:
i BU si~~ss P~ 21C.
Phone Number: (~~) SS3 -Z~f ab
I
Level Spreader Length ~ ~Jd ft.
Drainage Area I +7 ac.
Impervious Area 7,'~Z ac.
Forebay Area --~ cu ft.
Maximum Filter StriplBuffer Slope '7. Co
grass
(perpendicular to flow)
(on-site and off-site drainage to the level spreader)
(on-site and off-site drainage to the level spreader)
(0.2% of the contributing impervious surface area)
(6% for forested, leaf littler cover, 8% for thick ground cover
Max. Discharge from 1 "IHr Storm N ~ cfs
Max. Discharge to Level Spreader cfs
Filter Stripl Zone 2 Buffer Vegetation G~(LA~ ~JCX (thick ground cover or grass; canopied forest with leaf litter
(s¢ou~D Con~2 groundcover)
Pre-treatment or Bypass Method Used
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached, If a
requirement has not been mef, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
Applicants Initials
O w -Project Site was visited prior to designing level spreader.
v 0 o Date of the Site visit. PLEASE ATTACH TIME-DATED DIGITAL PHOTO OF EXISTING BUFFER CONDITIONS.
O w b Level spreader is at least 13 ft. per cfs for thick ground cover or grass or 65 ft per cfs in canopied forest with leaf
litter for 50-foot buffer; 50 ft per cfs for 100-foot buffer, or 40 ft. per cfs for 150-foot buffer.
1U~Pre-Formed Scour Holes are on flat slopes only.
OW C3 No structures are located in protected buffers (must meet no practical alternatives criteria).
Design Alternative (if any) and Bypass method used:
~ 1~ Bypass conveyance method is specified and plan details and calculations are provided.
~'~ Alternative design option is specified and plan details and calculations are provided.
~ ~~ Discharge to level spreader and subsequent filter strip is hydraulically and spatially separate from the bypass
discharge.
D W ~ No structures are located in protected buffers.
N /A Plan details for the bypass and outlets are provided.
flw ~ The operation and maintenance agreement includes annual erosion and vegetation repair.
Owg The operation and maintenance agreement signed and notarized by the responsible party is provided.

OCT 1 5 2007
DENk - WA7FR Q1)ALITY
4VETLAND3 At~D STORMWATER BRANCH

a'
Ok
V_

-:
Filter Strip, Restored Riparian Buffer and Level Spreader
Inspection and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
- Immediately after the filter strip is established, any newly planted vegetation
will be watered twice weekly if needed until the plants become established
(commonly six weeks).
- Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation
- Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
- Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches depending on aesthetic requirements
(NIPC,1993). Forested filter strips do not require this type of maintenance.
- Once a year, the soil will be aerated if necessary.
- Once a year, soil pH will be tested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County).
Records of inspection and maintenance will be kept in a known set location and will be
available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element: Potential roblem: How I will remediate the roblem:
The entire filter strip Trash/ debris is present. Remove the trash/ debris.
s stem
flow splitter device
' ow splitter device is clog the conveyance and dispose
(if ap
able) clo ed. ~ of an invent off-site.
The flow splitter e is Make any nec repairs or
damaged. replace if damage is to e for
re air.

BMP element: Potential roblem: How I will remediate the roblem:
The Swale and the level The Swale is clogged with Remove the sediment and dispose
lip sediment. of it off-site.
The level lip is cracked, Repair or replace lip.
settled, undercut, eroded or
otherwise dama ed.
There is erosion around the Regrade the soil to create a berm
end of the level spreader that that is higher than the level lip, and
shows stormwater has then plant a ground cover and
bypassed it. water until it is established. Provide
lime and aone-time fertilizer
a lication.
Trees or shrubs have begun Remove them.
to grow on the Swale or just
downslo e of the level li .
e bypass channel yeas of bare soil and/or rade the soil if necessary to
ero ' e gullies have formed. remo the gully, and then
reestablis o er erosion control.
Turf reinforc ent is Study the site to if a larger
damaged or ripap ' rolling bypass channel is nee (enlarge if
downhill. necessary). After this, rees lish
the erosion control material.
The filter strip Grass is too short or too long Maintain grass at a height of
if a licable . a roximatel three to six inches.
Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer a lication.
Sediment is building up on Remove the sediment and
the filter strip. restabilize the soil with vegetation if
necessary. Provide lime and a one-
time fertilizer a lication.
Plants are desiccated. Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or Determine the source of the
dy~g• problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide aone-time
fertilizer a lication.
Nuisance vegetation is Remove vegetation by hand if
choking out desirable species. possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water Erosion or other signs of Contact the NC Division of Water
damage have occurred at the Quality local Regional Office, or the
outlet. 401 Oversi ht Unit at 919-733-1786.

.~
.'
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Print name: William R. O'Neal V
Title: Owner
Address: 5 Nicklaus Wav Clayton NC 27520
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
I, `''-~'~.-~'K'e'' ~ . ~G~"~C~,,~~', a Notary Public for the State of
l~Z~~* ~~~'~~'ounty of , do hereby certify that
~~~~'rn) a ~ ~ personally appeared before me this 1~~"
day of ,c~, and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal,
~~~~.1E N ~~ A~, ,
vQ v~p~~ ~~ ~~ ,~ ~~
_._ !
\ F~. 2,.1
os ~~ ~ ` •
\Z~cc~?.~ -~~ .,:
SEAL
My commission expires ~~~ ~' Q
Date: • /(~ ~- ~~' ~ ~

`-~C.C 4 LA- T7 u rJ
i R_ 7
i ~ ~ ~ 7 sic
~, ~m~'YLV,ou !~
I /
//!)~~v l4itS ASS l ~t7~f -2~
86~
~~~)C~~ = a.~3
~uFF~/L ~~i~ -S Carni3~~~-T7o~ ~~
G-~au,~ o cb us,~ G~ s '~' n 7rltrcK
use .136 ~ Ec. ~~2~~~

,~'

/ / 100
0
~ o
X1658-19-0704
N & HILDA\
BLACK
~ MO
B-2 ZONING 1658-19-87D7
PARKSIDE VILLAGE
ASSOCIATES
APARTMENTS
0 & I ZONING
E~ISTIN SIDEWALk •
D
GRAPHIC SCALE
100 200
( IN FEET )
1 inch = 100 ft,
~I
XISTING
20.0 S NITARY SEWER/ 25~ CROS AC SSE EME T 8 ti ~(
AIN GE EASEMENT ~~ g
j~ ~
0 U ILITY PRESENT + ~
S 8
~~ ,.
~ Z
a N B-

Y
- W
FOR
'
Z o ~ - 110
~ U
3 W ~ -
w W - O-
00 8-09-9382 W
~ ~
~ U in
N w u
O EUGENE & ROSE
BUTLER Q N
N W 54 Q
20'° N! ~
Q s+a~ N Q
W

~ SINGLE FAMILY s ~
B-2 ZONING W o+e7 ~+ze

10.00 TEMPORARY
O
°N
~ ~

~
30~ LAND P BUF
/ U
Q
°
~ /~ ,t EASEMENT
~ i
/
/ /
/
I
~ + ~J /~
1e~6~'f~- l
~/
/
~~ ~
y
>/
9 'l
,o~Jt,~' y \\
6~~ 4f P~~~ \ \
~ F
0' DRAI
W
~~
z'~
k
~~~
V ~ U
~ tltltlBJJJ

~~
l~
W
U
REV1sI0NS:
scA~:
i"~tao'
DRAAN BY:
D11B
DA7'&~
10/06/07
PROJECT N0,
J-402
sRrorr
1
o~ 1

1716s s C,~~ 8~cs„~~ss ~~
~~fi~~
~t.cu~~nu~
D~- i7
- ~ 7 ~-~.
~mPL~Y~.v,ouSNt~55 ~ccc22~,,,r) -- /`~ /o
~~ or-n~ ~ ~.cs mss (,~,-~ ~,~ ~ - ~ 6
~~~- - ~.~b~~~, 2~ ~~6~~C 9~ z o~7~
~~FF~2 Cv~Tr~ i ~ - S ~ ~ ~ lam" ~~ -O~
Cr~un-o ~~~,~ Cami3>,~-4~70--~ e~ GAS ~p ~rC~

/ /~
~ o
~ I
I
/~
Q
D~
~ 1658-19-0704
CLARENCE & HILDA\
BLACKMON
B-2 ZONING
XISTING
20.0 S NITARY SEWER/
AIN GE EASEMENT
0 U ILITY PRESENT
•
D

00 8-09-9382
:
' EUGENE & ROSE
y
0 BUTLER
SINGLE FAMILY
B-2 ZONING
/
10,00' TEMPORARY

~ Q ~-l~ CONSTRUCTION I
EASEMENT ~
~ / /
/ /
/
, ~
4~ //

9 y
9
,0~ JCS G y
~
~ ~
6c~0 ~ P~\
F \ \
~~~~~ ~~'
~
~\~ ~ ~
g9
Q~P
0~~5~' y
g0~ N' `~ P~\~
'o+ ~ ~ \
LL
J Z ~ V,
~W U W
~ U
N W N IQ
,oo
1658-19-8707
PARKSIDE VILLAGE
ASSOCIATES
APARTMENTS
0 & I ZONING
SDEWALK •
CROSS A
FH
~EME~T
GRAPHIC SCALE
so goo sao
( IN FEET )
1 inch = 100 ft,
~~
;t
B-
Q 2+47
30'~AN
a
Z
W
W
N W

F IQ
•
,F~OR~1 ~10'
' 1- I ~--~
i+ze
y
DR
z°~
a~
~~~
~$~~~
i
~~~
0
U
~~
W
I~
`~
REY1910R9:
9CA1L~:
~'~ioo'
DRAlfll RY.
D1IB
DAT&~
io/os/or
PROTECT N0.
T-402
9REET
OF 1