HomeMy WebLinkAbout20140147 Ver 1_Other Agency Comments_20140313 (2)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: Potential roblems: How I will remediate the roblem:
The entire BMP Trash/ debris is resent. 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 a lication.
The inlet device: pipe, The pipe is clogged (if Unclog the pipe. Dispose of the
stone verge or swale a licable . sediment off-site.
The pipe is cracked or Replace the pipe.
otherwise damaged (if
a licable).
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 roblems with erosion.
Stone verge is clogged or Remove sediment and clogged
covered in sediment (if stone and replace with clean stone.
a licable).
Form SW401-Bioretention O&M-Rev.3 Page 1 of 4
BMP element: Potential roblems: How I will remediate the roblem:
The pretreatment area Flow is Uypassing Regrade if necessary to route all
pretreatment area and/or flow to the pretreatment area.
llies have formed. Restabilize the area after radin .
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 retreatment area.
Erosion has occurred. Provide additional erosion
protection such as reinforced turf
matting ar riprap if needed to
revent future erosion roblems.
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 necessa
Tree stakes/wires are present Remove tree stake/wires (which
six months after lantin . 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 de th of three inches.
Soils and/or mulch are Determine the extent of the clogging
clogged with sediment. - remove and replace ei�her 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
ossible.
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 lantin media.
Form SW401-Bioretention O&M-Rev.3 Page 2 of 4
BMP element: Potential roblems: How I will remediate the roblem:
The underdrain system Clogging has occurred. Wash out the underdrain system.
(if a licable)
The drop inlet Clogging has occurred. Clean out the drop inlet. Dispose of
the sediment off-site.
The dro inlet is dama ed Re air or re lace the dro 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.
Form 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:Chestnut Rid�e at Blowing Rock
BMP drainage area number:Bioretention Basin
Print name: �i-ci�rai�d--S�r-k-�'� R; ��A�'�` �• s pa +� k S
Title: President/CEO
Address: PO Box 2600 336 Deerfield Rd. Boone, NC 28607
Phone: 828-262-4100
Signature: % .�/% �l lo� J�i,�✓L
Date: � c�Q �
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, �� �� �� PG��-�}') S , a Notary Public far the State of
����,�� �/�'� �, County of �.CJ��ti���"ti , do hereby certify that
� � ' S ersonall a eared before me this ��.
1� tC�_�Gd �- _��R"%��% - P Y PP
day o�1C�-��- ,�l , and acknowledge the due execution of the
forgoing bioretention maintenance requirements. Witness my hand and ofiicial seal,
Veton6a G E�ar��ns
Notary Publia
Watauga Cou�
Commissian Expires
C�.-
SEAL
My commission expires ,/f�IC� � �� �� �� ��
Form SW401-Bioretention I&M-Rev. 2 Page 4 Of 4