20110777 Ver 1_More Info Received_20110918

Lucas, Annette
From: Ron Sutton [[e-mail]]
Sent: Sunday, September 18, 2011 6:41 PM
To: Lucas, Annette
Subject: RE: 11-0777 Batts Farm II
Attachments: Batts Farm Supplemental Form and O&M Agreeement.pdf
Annette:
Attached for your review is a completed copy of the Supplement Form you requested. I have forwarded to the Owner
the 0&M Agreement for his execution and hope to have it back in a digital format on Monday. Upon receipt I will
forward it to you also. I will also upon receipt of the executed 0 &M Agreement forward it along with a hard copy of the
Supplement Form. Thank you for your assistance in this matter. If you should have further questions or need any
additional information please feel free to call or e-mail.
Ron Sutton, P.E.
From: Lucas, Annette [mailto:annette.lucas(dncdenr.gov]
Sent: Thursday, September 15, 20112:18 PM
To: rsutton(fterring-sutton.com
Cc: Witherspoon, Lauren; Chapman, Amy
Subject: 11-0777 Batts Farm II
Ron,
I have looked at the design of the level spreader and I am not seeing any major design issues. However, as we just
discussed on the phone, a LS-VFS Supplement Form was not included with the submittal. Please complete this form and
check to make sure that all of the required items listed on the form were in your submittal that we received on August
18, 2011. If the form and any additional information has been emailed to Lauren and me by 5:00 pm tomorrow
(September 16, 2011), then I will include it in my review. You need to also submit two hard copies of the information to
me at the address below as soon as possible.
If we don't receive the information by the end of the day tomorrow, then we will send a letter requesting the form.
Thanks,
Annette
Annette M. Lucas, PE
Environmental Engineer
NCDENR DWQ Wetlands and Stormwater Branch
1650 Mail Service Center, Raleigh, NC 27699-1650 (%I t i l)
512 N. Salisbury St, Raleigh, NC 27604 1 91b Floor (I.,wollm ?ti. P??ia?l5)
Phone: [phone] Fax: [phone] Email: i)iit-tiJI.u? Websi'e http://Dortal.ncdenr.org/web/wq/swp/ws/401
`A Before printing this email, please consider your budget and the environment.
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to
third parties.
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STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
LEVEL SPREADER - VEGETATED FILTER STRIP (LS-VFS) SUPPLEMENT
This form must be completely filled out, printed, initialed, and submitted.

`NAA'lEIAN
The purpose of the LS-VFS Buffer Rule: Diffuse Flow
Stormwater arders LS-VFS from A BMP
Type of VFS Engineered fitter strip (graded & sodded, slope < 8%)
Explanation of any 'Other' responses above The purpose of the level spreader is to diffuse Now from the first inch of run-off in
conjunction with bypassing the remaining flow through the a Neuse Buffer
K Stommwdw Enhn the LS-VFS from the Dainapa Ara
Drainage area ft2 Do not complete this section of the form.
Impervious surface area ft' Do not complete this section of the form.
Percent impervious % Do not complete this section of the form.
Rational C coefficient Do not complete this section of the form.
Peak flow from the 1 inthr storm cfs Do not complete this section of the form.
Time of concentration min Do not complete this section of the form.
Rainfall intensity, 1 0-yr storm it tr Do not complete this section of the form.
Peak flow from the 10•yr stone cfs Do rat complete this section of the form.
Design storm
Maximum anourd of flow directed to the LS-VFS cfS Do not complete this section of the form.
Is a flow bypass system going to be used? (Y or N) Do not complete this section of the form.
Explanation of any "Other" responses above
If Stom w" Enters the LS-VFS from a NP
Type of BMP
Peak discharge from the BMP during the design storm
Peak disdtarge from the BMP during the 10-year storm
Maximum capacity of a 1004W long LS-VFS
Peak flow directed to the LS-VFS
Is a flow bypass system going to be used?
Explanation of any "Other' responses above
LS-VFS Design
Forebay surface area
Depth of forebay at stonwater entry pant
Depth of forebay at stomnvater exit point
Feet of level-lip needed per cfs
Computed minimum length of the level lip needed
Length of level lip provided
Width of VFS
Elevation at downs base of level lip
Wet Detention Pond
4.5 cis
7.9 cfs
10 cfs
0.04 cfs
y (Y or N)
NA sq ft
in
in
10 N/cfs
0 ft
10 ft
20 N
133.60 lmsl
No forebay is required
Ten feet is the minimum level spreader length.
Width of VFS is not adequate.
Form SW401 - LS-VFS - 27Ju12011 - Rev.9 page 1 of 3
Elevation at the end of the VFS that is farthest from the LS
Slope (from level lip to the end of the VFS)
Are any draws present in the VFS?
Is there a collector swale at the and of the VFS?
Bypass System Design (If applic")
Is a bypass system provided?
Is there an engineered flow splitting device?
Dimensions of the channel (see diagram below):
y (flow depth for 10-year storm)
freeboard (during the 10•year storm)
Peak velocity in the channel during the 10-yr storm
Channel lining material
Does the bypass discharge through a wetland?
Does the channel enter the stream at an angle?
Explanation of any 'Other' responses above
133.50 frwl
0.50 %
N (Y or N)
N (Y or N)
Y (Y or N)
N (Y or N)
3.00 ft
3.00 It
15.00 ft
0.43 ft
1.57 ft
4.25 ft/sec
Pick one:
OK
(Y or N)
Y (Y or N)
NOTE: WE ARE NOT CLAIMING CREDIT FOR VFS AND WE ARE ONLY
RESPONSIBLE FOR DIFFUSED FLOW. THE CHANNEL LINING IS GRASS.
W

+ B +
EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be found. An Incomplete submittal package will result in
a request for additional Information. This will delay final review, and approval of the project. Initial in the space provided to indicate the following
design requirements have been met If the applicant has designated an agent, the agent may initial below. If a requirement has not boon met, attach
justification.
Requried kern:
1. Plans (1' - W or larger) of the entire site stowing:
- Design at ultimnte build-out,
- Of-site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Forebay (tt apples).
- High flow bypass system,
- Maintenance access,
- Proposed drainage easement and public right of way (ROW), and
- Boundaries of drainage easement.
Isis Page or plan sheet number and any notes:
PP-1 of 1
Form SW401 - LS-VFS - 27Jur2011 - Rev.9 page 2 of 3
2. Plan details (1' = 3A' or larger) for the level spreader showing:
- Forebey (if applkable),
- High flow bypass system,
- One foot topo lines between the level lip and top of stream bank,
- Proposed drainage easement, and
- Design at ultimate build-oul.
3. Section view of the level spreader (1' = 2t7 or larger) showing:
- Undendrain system (if applicable),
Level lip,
Upslope channel, and
Downslope fitter fabric.
4. Plan data ft of the flow splitting device and supporting calculations (if applicable).
5. A construction sequenoe that shows how the level spreader will be protected from
sediment until the entire drainage area is stabilized.
6. If a non-engineered VFS is being used, then provide a photograph of the VFS showing
that no draws are present.
7. The supporting calculations.
8. A copy of the signed and notarized operation and maintenance (O&M) agreement.
1 of 2
rt L5 IPD 1 of 2
1 of 2
ATTACHED AS PART OF THE SUBMITTED STORM DRAINAGE
CALCULATIONS.
UNSIGED COPY ATTACHED WILL FORWARD SIGNED COPY
UPON RECIEPT FROM OWNER.
Forth SW401 - LS-VFS - 27Ju12011 - Rev.9 page 3 of 3
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Filter Strip, Restored Riparian Buffer and Level Spreader
Operation 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 operation 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 problem:
The entire filter strip Trash/debris is present. Remove the trash/debris.
system
The flow splitter device The flow splitter device is Unclog the conveyance and dispose
(if applicable) clogged. of an sediment off-site.
The flow sputter device is Make any necessary repairs or
damaged. replace if damage is too large for
repair.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev. 3 Page 1 of 3
BMP element: Potential problem: How I will remediate the problem:
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 damaged.
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 a one-time fertilizer
application.
Trees or shrubs have begun Remove them.
to grow on the swale or just
downslo a of the level lip.
The bypass channel Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then
reestablish proper erosion control.
Turf reinforcement is Study the site to see if a larger
damaged or ripap is rolling bypass channel is needed (enlarge if
downhill. necessary). After this, reestablish
the erosion control material.
The filter strip Grass is too short or too long Maintain grass at a height of
if applicable). approximately 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 application.
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 application.
Plants are desiccated. Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or Determine the source of the
dying. problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer application.
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 Oversight Unit at 919-733-1786.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev. 3 Page 2 of 3
• Permit Number:
(to be provided by DWQ)
County of do hereby certify that
personally appeared before me this
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.
Projectname:BATTS FARM II
BMP drainage area number: I (WET DETENTION POND BMP)
Print name: WGB PROPERTIES, INC.
Title:PRESIDENT
Address:P.O. BOX 7226 GREENVILLE, NC 27835
Phone:[phone]
Signature:
Date:
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, , a Notary Public for the State of
day of , and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements.
Witness my hand and official seal,
SEAL
My commission expires,
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev. 3 Page 3 of 3