20160123 Ver 1_BMP OMA bioretention_20160323

Burdette, Jennifer a
From: Burdette, Jennifer a
Sent: Wednesday, March 23, 2016 2:18 PM
To: 'Julie Quinn'
Subject: RE: 2700 Manning Place Fwd: Mid Century Modern Renovation
Attachments: BMPMan-OMA-Bioretention-20080206-DWQ-SPU.doc
Julie,
Please see the following link for guidance on designing and planning a rain garden. At the end, it includes a list
of the maintenance items that are required to ensure proper function of the rain garden. Also attached is the
O&M agreement for bioretention areas. Replace the table section of the bioretention form with the table at
the end of the rain garden document. We require treatment of stormwater runoff from impervious surfaces at
least equivalent to the amount of proposed buffer impact.
https://brunswicl<.ces.ncsu.edu/wp-content/uploads/2013/04/Bacl<yard-Rain-Garden-Manual.pdf?fwd=no
As we discussed via telephone, a drainage easement around the rain garden that connects to the public ROW is
required. A deed restriction is also required that ensures the rain garden/drainage easement will be maintained
in perpetuity.
Also, if you submit a revised site plan that involves more buffer impact, please include an explanation as to why
the revised plan is necessary and an updated application form including securing a revised statement of
availability for mitigation.
Thanks,
Jennifer
Jennifer Burdette
401/Buffer Coordinator
Division of Water Resources - 401 & Buffer Permitting Branch
Department of Environmental Quality
919 807 6364 office
iennifer.burdetteQncdenr.gov
1617 Mail Service Center
Raleigh, NC 27699-1617
(Physical Address: 512 N. Salisbury St, Raleigh, NC 27604 - 9t" Flr Archdale Bldg — Room 942F)
Email cor etil'.)onc'lence to and ii`orn thio; address o; sutYect to t1he
P,Iodhl Carolina Public Rai:'o1"ds L w and 1`Y7ay be disclosed to thloi d I'.'s' dies,
From: Julie Quinn[mailto:[e-mail]]
Sent: Thursday, March 17, 2016 12:16 PM

To: Burdette, Jennifer a <[e-mail]>
Subject: 2700 Manning Place Fwd: Mid Century Modern Renovation
Julie Quinn
Project Manager
Phone: [phone]
[e-mail]
PO Box 162 Rolesville NC 27571
www.bwwattsconstruction.com
www.facebook.com/bwwattsconstruction.com
Begin forwarded message:
From: <[e-mail]>
Date: March 11, 2016 at 6:00:02 PM EST
To: <[e-mail]>
Cc: <[e-mail]>
Subject: Mid Century Modern Renovation
Julie,
Attached is the preliminary floor plan of the Mid Century Modern for your review and comment.
Mike had several key suggestions and we are both very excited about the new plan.
Please contact us with any questions.
We look forward to working with you and this project.
Thank you,
Rick Michaels,
McMillan Design

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Bioretention 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 operation and maintenance procedures:
— Immediately after the bioretention cell is established, the plants will be watered
twice weekly if needed until the plants become established (commonly six
weeks).
— Snow, mulch or any other material will NEVER be piled on the surface of the
bioretention cell.
— Heavy equipment will NEVER be driven over the bioretention cell.
— Special care will be taken to prevent sediment from entering the bioretention cell.
— Once a year, a soil test of the soil media will be conducted.
After the bioretention cell is established, I will inspect it once a month and within 24
hours after every storm event greater than 1.0 inches (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:
Potentialproblems:
How I will remediate theproblem:
The entire BMP
Trash/ debris is present.
Remove the trash/ debris.
The perimeter of the
Areas of bare soil and/or
Regrade the soil if necessary to
bioretention cell
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.
The inlet device: pipe,
The pipe is clogged (if
Unclog the pipe. Dispose of the
stone verge or swale
applicable).
sediment off-site.
The pipe is cracked or
Replace the pipe.
otherwise damaged (if
applicable).
Erosion is occurring in the
Regrade the swale if necessary to
swale (if applicable).
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
Stone verge is clogged or
Remove sediment and clogged
covered in sediment (if
stone and replace with clean stone.
applicable).
Form SW401-Bioretention O&M-Rev.3 Page 1 of 4

BMP element:
Potentialproblems:
How I will remediate theproblem:
The pretreatment area
Flow is bypassing
Regrade if necessary to route all
pretreatment area and/or
flow to the pretreatment area.
gullies have formed.
Restabilize the area after grading.
Sediment has accumulated to
Search for the source of the
a depth greater than three
sediment and remedy the problem if
inches.
possible. Remove the sediment and
restabilize the pretreatment area.
Erosion has occurred.
Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by
hand.
The bioretention cell:
Best professional practices
Prune according to best professional
vegetation
show that pruning is needed
practices.
to maintain optimal plant
health.
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 to establish the
ground cover if a soil test indicates
it is necessary.
Tree stakes/wires are present
Remove tree stake/wires (which
six months after planting.
can kill the tree if not removed).
The bioretention cell:
Mulch is breaking down or
Spot mulch if there are only random
soils and mulch
has floated away.
void areas. Replace whole mulch
layer if necessary. Remove the
remaining much and replace with
triple shredded hard wood mulch at
a maximum depth of three inches.
Soils and/or mulch are
Determine the extent of the clogging
clogged with sediment.
- remove and replace either just the
top layers or the entire media as
needed. Dispose of the spoil in an
appropriate off-site location. Use
triple shredded hard wood mulch at
a maximum depth of three inches.
Search for the source of the
sediment and remedy the problem if
possible.
An annual soil test shows that
Dolomitic lime shall be applied as
pH has dropped or heavy
recommended per the soil test and
metals have accumulated in
toxic soils shall be removed,
the soil media.
disposed of properly and replaced
with new planting media.
Foran SW401-Bioretention O&M-Rev.3 Page 2 of 4

BMP element:
Potentialproblems:
How I will remediate theproblem:
The underdrain system
Clogging has occurred.
Wash out the underdrain system.
(if applicable)
The drop inlet
Clogging has occurred.
Clean out the drop inlet. Dispose of
the sediment off-site.
The drop inlet is damaged
Repair or replace the drop inlet.
The receiving water
Erosion or other signs of
Contact the NC Division of Water
damage have occurred at the
Quality 401 Oversight Unit at 919 -
outlet.
733-1786.
Foran SW401-Bioretention O&M-Rev.3 Page 3 of 4

Permit Number:
(to be provided by DWQ)
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.
Project name:
BMP drainage area number:
Print name:
Title:
Address:
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,
day of
a Notary Public for the State of
County of , do hereby certify that
personally appeared before me this
and acknowledge the due execution of the
forgoing bioretention maintenance requirements. Witness my hand and official seal,
SEAL
My commission expires
Form SW401-Bioretention I&M-Rev. 2 Page 4 of 4