20110661 Ver 1_Stormwater Info_20120709

Adc�:= Jones & Cnossen
ENGINEERING PLLC
Civil Engineering I Construction Management I Land Planning
Ms Karen Higgins
NCDWQ — Division of Water Quality
1650 Mail Service Center
Raleigh North Carolina 27699
RE Request for More Information
Chastain Subdivision (DWQ Project #2011 066 1)
Dear Karen
221 N SALEM ST SUITE 200
PO BOX 1062
APEX NC 27502
Off ce 919 387 1174
Fax [phone]
wwwjonescnossen corn
July 3 2012
I have received your letter Request for More Information dated June 26 2012 and am herein providing the
following responses for continuation of staff s review of the project
I The signed and notarized Operation and Maintenance (O &M) Agreement is attached
2 A CD is attached with TIFF format copies of the plans
It is hoped that this information is sufficient for approval following your review If you have any questions
or need anything else please let me know
Sincerely
iA�4 9 M944m,
Peter D Cnossen P E
Jones & Cnossen Engineering PLLC
Cc Divida Johnson — Omega Management
Attachments
C/i 1 9
2012 i

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:Chastain
BMP drainage area number:]
Print names
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.
L, t `, a Notary Public for the State of
caa, aa_, County of _yak (- , do hereby certify that
(� personally appeared before me this��
day of Jyrne -- A0P . and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and /or level spreader maintenance requirements.
Witness my hand and official seal,
DEBRA L HAYNES
NOTARY PUBLIC
WAKE COUNTY
STATE OF NORTH CAROLINA
My commission expires J UU U aD?O)(
Form S)W401 -Level Spreader, Filter Strip, Restored Riparian Buffer O &M -Rev.3 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 problem:
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 any sediment off -site.
The flow splitter 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 l of 3

BMP element:
Potential problem:
How I will remediate the problem:
The swale and the level
lip (N /A)
The swale is clogged with
sediment.
Remove the sediment and dispose
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 e 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).
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 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