20061949 Ver 1_More Info Received_20070504

o~ --a~-q
~ Soil & Environmental Consultants, PA
11.010 Raven Ridge Road Raleigh, North Carolina 27614 Phone: [phone] Fax: [phone]
.. www.SandEC.com
Transmittal
To: ~n r12-~t-e. ~UCG~~, Project #: lU~~,S . ~2 Date: ~ l'-~ ~ 6~-
~{U l (~~ys ~ ~`(`~ ~ CX-~'`~ 0 =~~ Proj ect Name: ~~'DC~P ~ o ~17P ~~
N C tom. ENS - 1~.JQ ~~ ~ G--r~x'~~n 4 ~ ~ ~e~ ~es-~ tiz,~-~c~
File: .
We Transmit to you Herewith:
^ Drawings
^ Specifications
^ Brochures or photos
^ Correspondence
^ As per your request
^ For your information and files
© For comment or approval
^ Returned for correction, resubmit
^ Approved as noted
Under Separate Cover:
^ By mail
^ By courier
^ ~ By express
No. Co ies Document No. Date Description

1 ~ ~~ - ~ ~ U~~e. r~-~ ~ -Pc~2c~ W k-s-t-.

Remarks: ~ ~4 ~~ ~~C ~c '~iQ = 2.~Ob - I~t `-~`~ ~ctiYl ~...1 ~ :l ~L`t1~

~.JC~ ~-~ ~2 ~- ~~\~~e-~ c~ Sybdty~S~~ Ls%~ ~* yS

If enclosures are not as listed as above, kindly notify us at once. ~ ~ ~„~ ~~.~~ ~ ~~ =1 ~s ~? c 3`~
~~~
~I~Y ~ ~f~Ol
By: N~CS~~~ `Mc1Cc~luSc~
>.rFw~ - vv~~~s~ ~tt~At_~~~
.n1~C?;; fu~7t ~gn~x',gw,v~sT,p 9RA.NCh
Charlotte Office: Greensboro Office:
236 LePhillip Court, Suite C 3817-E Lawndale Drive
Concord, NC 28025 Greensboro, NC 27455
Phone: [phone] Phone:; [phone]
Fax: [phone] Fax [phone]-R235

Soil & Environmental Consultants, PA
11010 Raven Ridge Road Raleigh, North Cazolina 27614 Phone: [phone] Fax: [phone]
www.SandEC.com
May 3, 2007
Project 10535.D2
DWQ Project No.: 2006-1949 Franklin County
Ms. Annette Lucas
401 Oversight and Express Permits Unit
NCDENR Division of Water Quality
2321 Crabtree Boulevard
Raleigh, NC 27604
Reference: Request for Additional Information
Procopio Rain Garden and Buffer Restoration
DWQ Project Brookfield Subdivision Lot #45
Franklin County, NC
Dear Ms. Lucas,
With this letter we are submitting additional information for the Procopio Rain Garden and
Buffer Restoration project located at Brookfield Subdivision Lot #45 in Franklin County, NC.
Per your request, a completed DWQ Bioretention Area Worksheet is attached. In addition,
Sheets 3 and 7 of the original submitted Rain Garden & Buffer Restoration drawings will be
replaced with the attached Sheets 3 and 7. The attached drawing Sheet 3 has been modified from
the original to include a plan view of the rain garden with a planting plan. The attached drawing
Sheet 7 has been modified to include a list of perennials to be planted in the rain garden.
Sheet 6 of 7 of the original Rain Garden & Buffer Restoration drawings shows the planting fill
soil specifications for the rain garden. This fill soil will be custom mixed and provided by North
State Environmental, the selected contractor for this project.
If you have any questions concerning this submittal, please do not hesitate to contact us.
~~~~111 I Ilil/~~/
Sincerely, ~~`~~`~; ~ ~ ~ of j~~i~
SOIL & ENVIRONMENTAL ~A - ~T~~~a ~~x ~ ~` ~ ~ `- ~ ; +~~r w t
({(~~\ ~ ` A ~ . 4 SEAL _ ,~ ~T g ~ /~ ~/ ,p (~ ~
Rebecca S. Wargo, PE ~ ~ ~ •• F ~ ~~ ~~%d ~ ~ ~
~~ F . H~,+ : (v~ . Qi. ~~ ':1G;rV~v .. yL,p ~ ~~' ~U~sLiiti"
NCPE 31266 ii~~~• • .. • ~~~~~ ~r ri q~~r~~ ,iip ~~n~a
Attachments: DWQ Bioretention Area Worksheet, Procopio Rain Garden & Buffer Restoration
Construction Drawings

o (~ - t 9 ~f 9
~'~--~-
DWQ Project No. ZC3Gly - ~~ y`~ F,ra~~nk..1 ~ r1 Ccv.~n~y
DIVISION OF WATER QUALITY - BIORETENTION AREA WORKSHEET
I. PROJECT INFORMATION (please complete the following information):
Project Name : ? GD ~ C3 ~~ e.~
Contact Person: ~2beccc~ S• v-~w- o . - Phone Number. (Rl°t) ~ 4{0 - S`i o© 2 ~t-• 2 1
For projects with multiple basins, specify which basin is worksheet applies to:
Permanent Pool Elevation GI?~ ft.
Temporary Pool Elevation G13 . ~S ft.

Bioretention Surface Area ICU . ~ sq. ft.
Drainage Area 7 . U°I ac.
Impervious Area d . o `-I'`-) ac.
Rational C Coefficient U .~~
Size % ~- 7t
Inlet Velocity Z. fps
Inlet flow depth t .2 in
Depth to Ground Water = ~- ft.
Planting Soil Infiltration Rate t.6 in.lhr.
In-Situ Soil Infiltration Rate 0.13 in.lhr.

II. REQUIRED ITEMS CHECKLIST
(elevation of the orifice invert out)
(elevation of the outlet structure invert in)
(on-site and off-site drainage to the basin)-nr,;s was ~~~e ~ to
/ Sim. e~'>r~\~w
- = 1zr~.*L=top , ~.-ivGvx-may .~ ~drLwn\~
(either 5% in wlsand under drain or 7% in w/o)
(the soil layer down to 4 feet)
(the soil layer below 4 feet or below the sand bed)
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 met, 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
1(,lN No vertical sand bed is proposed
----- The bioretention area is at least 40 feet by 15 feet. ~
~S Sheet flow is provided at inlet.
Water table depth is greater than 6 feet.
'W Minimum of 6" ponding is provided.
125- The ponded area will draw down in less than 4 days.
1'L~,.~ Planting soil infiltration rate is greater than 0.52 in/hr.
The in-situ soil infiltration rate is greater than 0.2 in/hr.G
A planting plan with species and densities is provided.
'1 Mulch layer is specified in plans.
Planting soil meets minimum soil specifications (NCDENR stormwater Best Management
Practices Manual, April 1999)
(~t`r Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided.
An operation and maintenance agreement signed and notarized by the responsible party is provided.
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains
talc tes
~ rni s .S ~~ o-~ ~cSS.b\e ~1~ -4U Si ~-c ccros~-r-c~t cZ~s , ~nc.~.~ev~~ , ~e b ~ o~.-fec~-~cc~
C_~11 iS S~~C~~+n'f'~~t \c,,r~ ~C -'~rec^~~c ~M~rviC~S c~+('~~~ cN1 ~~~e.
C~ vc~de~~~c~e~s c~~ ~c-~clvcQd -~o ~nS~~~ ~~n~L l~rw~c~,~,r~ ~S less ~Ir~c~n
~ d~~s