SW3110802_Compliance Eval_2090712

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANIEL SMITH
Director
NORTH CAROLINA
Environmental Quality
July 12, 2019
Catawba County Board of Education
Attention: Matthew Stover, Superintendent
Post office Box 1010
Newton, North Carolina 28658
Subject: Compliance Evaluation Inspection
Webb Murry Elementary School
State Stormwater Permit SW3110802
Catawba County, North Carolina
Dear Mr. Stover:
Enclosed please find a copy of the Compliance Evaluation Inspection Report for the
inspection conducted at the Webb Murry Elementary School on July 10, 2019.
The reports should be self-explanatory; however, should you have any questions
concerning this report, please do not hesitate to contact me or Christopher Graybeal at
[phone] or by email at christopher. [e-mail].
Sincerely,
3,�� -5�t' tc
'Lahid S. Khan, CPM, (:PESO, CPSWQ
Regional Engineer
Land Quality Section
Enclosure
c: Stormwater Permitting Program
North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
Mooresville Regional Office 1610 East Center Avenue, Suite 301 I Mooresville, North Carolina 28115
NOffiti GA%F4um .✓ - - -

Compliance Inspection Report
Permit: SW3110802 Effective:03/21/12 Expiration: 09/22/21
Project: Webb Murray Elementary School
Owner: Catawba County Board of Education
County: Catawba Adress: 3901 Section House Rd
Region: Mooresville
City/State/Zip: Hickory NC 28601
Contact Person: Tim Markley Title:
Directions to Project:
Type of Project: State Stormwater - HD - Bioretention
Drain Areas: 001 - (Herman Branch) (03-08-32) ( C).
On -Site Representative(s):
Related Permits:
Inspection Date: 07/10/2019 Entry Time: 09:OOAM
Primary Inspector: Christopher Graybeal
Secondary Inspector(s):
Reason for Inspection: Routine '
Permit Inspection Type: State Stormwater
Facility Status: ® Compliant ❑ Not Compliant
Question Areas:
® State Stormwater
(See affachment summary)
Phone: [phone]
Exit Time: 10:OOAM
Phone: 704-663A 699
Inspection Type: Compliance Evaluation
page: 1

Permit. C-W3110802 Owner - Project: Catawba County Board of Edmatiun
Inspection Date: 07/10/2019 Inspection Type Compliance Evaluation Reason for Visit: Routine
Inspection Summary:
Site is compliant. Wet Detention Basin needs minor maintenance, debris buildup on trash rack should be removed and
vegetative overgrowth around the site should be addressed.
File Review Yes No NA NE
Is the permit active? ❑ ❑ ❑
Signed copy of the Engineer's certification is in the file? ■ ❑ ❑ ❑
Signed copy of the Operation & Maintenance Agreement is in the file? 0 ❑ ❑ ❑
Copy of the recorded deed restrictions is in the file? ❑ ❑ ❑
Comment: Please provide a copy of the recorded deed restrictions for the Wet Detention Basin.
Built Upon Area Yes No NA NE
Is the site BUA constructed as per the permit and approval plans? ® ❑ ❑ ❑
Is the drainage area as per the permit and approved plans? ® ❑ ❑ ❑
Is the BUA (as permitted) graded ©uoh that the runoff drains to the system? ■ ❑ ❑ ❑
Comment:
SW Measures Yes No NA NE
Are the SW measures constructed as per the approved plans? i ❑ ❑ ❑
Are the inlets located per the approved plans? ® ❑ ❑ ❑
Are the outlet structures located per the approved plans? ® ❑- ❑ ❑
Comment:
Operation and Maintenance Yes No NA NE
Are the SW measures being maintained and operated as per the permit requirements? ® ❑ ❑ ❑
Are the SW BMP inspection and maintenance records complete and available for review or provided to ❑ ❑ ® ❑
DWQ upon request?
Comment: Please continue to maintain the Wet Detention basin per the approved plan- A copy of the maintenance
agreement is attached with this report.
page: 2

Permit Number: z>
(to he provided by DWQ)
Drainage Area Number:
Wet Detention Basin 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 BN1P.
The wet detention basin system is defined as the wet detention basin,
pretreatment including forebays and the vegetated filter if one is provided.
This system (check one):
® does ❑ does not incorporate a vegetated filter at the outlet.
This system (check one):
❑ does Z does not incorporate pretreatment other than a forebay.
Important maintenance procedures:
— Immediately after the wet detention basin is established, the plants on the
vegetated shelf and perimeter of the basin should be watered twice weekly if
needed, until the plants become established (commonly six weeks).
— No portion of the wet detention pond should be fertilized after the first initial
fertilization that is required to establish the plants on the vegetated shelf.
— Stable groundcover should be maintained in the drainage area to reduce the
sediment load to the wet detention basin.
— If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain should be minimized to the
maximum extent practical.
— Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected 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 should be kept in a known set
location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
r,
S
BMP element:
Potentialproblem:
How 1 will remediate theproblem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the wet
Areas of bare soil and/or
Regrade the soil if necessary to
detention basin
erosive gullies have formed.
remove the gully, and then plant a
ground cover and water until it is
established. Provide lime aid a
one-time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of
long.
approximatel six inches.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 1 of 4

Permit Number:
(to be provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How I will remediate theproblem:
The inlet device: pipe or
The pipe is clogged.
Unclog the pipe. Dispose of the
swale
sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the swale if necessaiy to
swale.
smooth it over and provide erosion
control devices such as reinforced
turf matting or riprap to avoid
future problems with erosion.
The forebay
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design depth for
sediment storage.
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
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. If pesticide is used, wipe it on
the plants rather than s ra '
The vegetated shelf
Best professional practices
Prune according to best professional
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.
Weeds are present.
Remove the weeds, preferably by
hand. If pesticide is used, wipe it on
the plants rather than spraying.
The main treatment area
Sediment has accumulated to
Search for the source of the
a depth greater than the
sediment and remedy the problem if
original design sediment
storage depth.
possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
Algal growth covers over
Consult a professional to remove
50% of the area.
and control the algal growth.
Remove the plants by wiping them
Cattails, phragmites or other
invasive plants cover 50% of
with pesticide (do not spray)
the basin surface.
Form SW401-Wet Detention Basin O&M-Rev.4 Page 2 of 4

e
Permit Number:
(to he provided by DWQ)
Drainage Area Number:
BMP element:
Potentialproblem:
How][ will remediate theproblem:
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and
beaver activity is present.
consult a professional to remove
beavers.
A tree has started to grow on
Consult a dam safety specialist to
the embankment.
remove the tree.
Ait iauitud itispecliou lry tits
Make all iteeded repairs.
appropriate professional
shows that the embankment
needs repair. if applicable)
The outlet device
Clogging has occurred.
Clean out the outlet device. Dispose
of the sediment off -site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Division of
damage have occurred at the
Water (duality Regional Office, or
outlet.
the 401 Oversight Unit at 919-733-
1786.
The measuring device used to determine the sediment elevation shall be such
that it will give an accurate depth reading and not readily penetrate into
accumulated sediments.
When the permanent pool depth reads 1 feet in the main pond, the sediment
shall -be removed.
When the permanent pool depth reads 1 feet in the forebay, the sediment shall
be removed.
Sediment Removal
Bottom
BASIN DIAGRAM
Cll in the blanks)
V Permanent Pool Elevation 1007.50
z
Pe anen Pool
-------- --- Volume Sediment Removal Elevation 1003.0 Volume
-ft Min. --------------------------------------------
Sediment Bottom Elevation 1002.0 1-ft
Storage Sedimer
Storage
FOREBAY MAIN POND
Form SW401-Wet Detention Basin O&M-Rev.4 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 parry.
Project name:Webb Murray Elementary School
BMP drainage area number:
PiiIA tiamc.01gin Dalgel
Title: Superintendant
Address:P.O. Box 1010• Newton NC 28658
Date:_ a I q- — Z P ld(
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, t°k �, c u fir. L'�� , a Notary Public for the State of
N oc}�. �' ���\� ��, County ofdo hereby certify that
CO "-\ � (X e-C personally appeared before me this
day of Q r �4� and acknowledge the due execution of the
forgoing wet detention basin maintenance requirements. Witness my hand and official
seal,
WENDY D. GRIFFITH
NpT/kRY PUBLIC
Catawba County, North Carolina
SEAL
My commission expires QL 3 rU
Form SW401-Wet Detention Basin O&M-Rev.4 Page 4 of 4