SW8000243_CURRENT PERMIT_20230123

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 Ooo2'43
DOC TYPE
CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
2v23 0x23
YYYYMMDD

ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
DOLIGLAS R. ANSEL
Irnterim Director
January 23rd, 2023
Pyramid Real Estate Holdings, LLC
Attn: Yousry Sayed, Manager
6266 Mallard Drive
Wilmington, NC 28403
NORTH CAROLINA
Environmental Quality
Subject: Permit Renewal
Post -Construction Stormwater Management Permit No. SW8000243
Quality Chemical Labs Facility Expansion
New Hanover County
Dear Mr, Sayed:
The Division of Energy, Mineral and Land Resources received a complete 8-year Permit Renewal Application for
the subject permit on January 17t°, 2023. The Division is hereby notifying you that permit SW8000243 has been
renewed, updated, and re -issued on January 23rd, 2023, as attached. Please be aware that the renewal and re -
issuance of this stormwater permit does not imply that the site is currently in compliance.
This permit shall be effective until March 13th, 2031 and does not supersede any other agency permit that may be
required. The project shall be subject to the conditions and limitations as specified therein. This permit does not
impose new or increased stormwater control requirements; it clarifies the rules and requirements of this program
to provide you with a better understanding of your obligations under this permit. Failure to comply with these
requirements will result in future compliance problems. Please note that this permit is not transferable except
after notice to and approval by the Division.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request
an adjudicatory hearing by filing a written petition with the Office of Administrative Hearings (OAH). The
written petition must conform to Chapter 150B of the North Carolina General Statutes and must be filed with the
OAH within thirty (30) days of receipt of this permit. You should contact the OAH with all questions regarding
the filing fee (if a filing fee is required) and/or the details of the filing process at 6714 Mail Service Center,
Raleigh, NC 27699-6714, or via telephone at 919-431-3000, or visit their website at www.NCOAH.com. Unless
such demands are made this permit shall be final and binding.
If you have any questions concerning this permit, please contact Aisia Freeman in the Wilmington Regional
Office, at phone # [phone] or [e-mail].
Si��nceeffrely, o n
,Douglas R. Ansel, Interim Director
Division of Energy, Mineral and Land Resources
Enclosures: Attachment C —Permitting History
Copy of the Renewal Application Documents
DES/af: \\\Stormwater\Permits & Projects\2000\000423 HD\2023 01 permit 000243
cc: Wilmington Regional Office Stormwater File
North Carolina Department of Environmental Quality I Division of Energy, Mineral and Land Resources
Wilmington Regional Office 1127 Cardinal Drive Extension I Wilmington, North Carolina 28405
uoaiv wnuru �'
910.796.7215

Post Construction Stormwater Management
Permit No. SW8000243
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF ENERGY. MINERAL AND LAND RESOURCES
POST -CONSTRUCTION STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as
amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Pyramid Real Estate Holdings, LLC
Quality Chemical Labs — Facility Expansion
3220 Corporate Drive, New Hanover County
FOR THE
construction, operation and maintenance of one (1) wet detention pond in compliance with the provisions of
15A NCAC 2H .1000 and Session Law 2008-211 (hereafter referred to as the "stormwaterrules') as outlined in
the application, approved stormwater management plans, supplement, calculations, operation and
maintenance agreement, recorded documents, specifications, and other supporting data (the "approved plans
and specifications") as attached and/or on file with and approved by the Division of Energy, Mineral and Land
Resources (the "Division" or "DEMLR"). The project shall be constructed, operated and maintained in
accordance with these approved plans and specifications. The approved plans and specifications are
incorporated by reference and are enforceable part of this permit.
This permit shall be effective from the date of issuance until March 1311, 2031 and shall be subject to the
following specified conditions and limitations. The permit issued shall continue in force and effect until the
permittee files a request with the Division for a permit modification, transfer, renewal, or rescission, however,
these actions do not stay any condition. The issuance of this permit does not prohibit the Director from
reopening and modifying the permit, revoking and reissuing the permit, or terminating the permit for cause as
allowed by the laws, rules, and regulations contained in Title 15A NCAC 2H.1000 and NCGS 143-215.1 et.al.
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater described in the
application and other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as described in
Section 1.6 of this permit. The runoff from all built -upon area within the permitted drainage area(s) of
this project must be directed into the permitted stormwater control system(s). The stormwater control
has been designed to handle the runoff from 170,000 square feet of impervious area.
3. The maximum built -upon area allowed for the entire project is 170,000 square feet.
4. The drainage area(s) will be limited to the amount(s) of built -upon area indicated in Sections 1.2 and 1.6
of this permit, and per approved plans. The built -upon area for the future development is limited to
14,592 square feet.
5. A 50' wide vegetative buffer must be provided and maintained adjacent surface waters, measured
horizontally from and perpendicular to the normal pool of impounded structures, the top of bank of both
sides of streams and rivers and the mean high water line of tidal waters.
Page 1 of 5

Post Construction Stormwater Management
Permit No. SW8000243
6. The following design criteria have been provided in the wet detention pond and must be maintained at
design
condition:
a.
Drainage Area, acres:
6.66
Onsite, ft2:
290,000
Offsite, ft2:
0
b.
Total Impervious Surfaces, ft2:
170,000
Proposed Onsite, ft2:
101,038
Existing, ft2:
68,962
C.
Average Pond Design Depth, feet:
3.0
d.
TSS removal efficiency:
90%
e.
Design Storm, inches:
1.5
f.
Permanent Pool Elevation, FMSL:
35.5
g.
Permitted Surface Area @PP, ft2:
34,953
h.
Permitted Temporary Storage Volume, ft3:
23,350
i.
Temporary Storage Elevation, FMSL:
36.1
j.
Predevelopment 1 yr-24 hr. discharge rate, cfs:
2.56
k.
Controlling Orifice:
3.0" 0 pipe
I.
Orifice Flowrate, cfs :
0.09
m.
Permanent Pool Volume, ft3:
97,172
n.
Forebay Volume, ft3:
18,390
o.
Maximum Fountain Horsepower:
1/3
p.
Receiving Stream / River Basin:
Prince George Creek / Cape Fear
q.
Stream Index Number:
18-74-53
r.
Classification of Water Body:
"C; Sw"
II. SCHEDULE OF COMPLIANCE
The stormwater management system shall be constructed in its entirety, vegetated and operational for
its intended use prior to the construction of any built -upon surface.
No person or entity, including the permittee, shall alter any component shown in the approved plans
and specifications. Prior to the construction of any modification to the approved plans, the permittee
shall submit to the Director, and shall have received approval for modified plans, specifications, and
calculations including, but not limited to, those listed below. For changes to the project or SCM that
impact the certifications, a new or updated certification(s), as applicable, will be required and a copy
must be submitted to the appropriate DEO regional office upon completion of the modification.
a. Any modification to the approved plans and specifications, regardless of size including the SCM(s),
BUA, details, etc.
b. Redesign or addition to the approved amount of BUA or to the drainage area.
c. Further development, subdivision, acquisition, lease or sale of any, all or part of the project and/or
property area as reported in the approved plans and specifications.
d. Altering, modifying, removing, relocating, redirecting, regrading, or resizing of any component of the
approved SCM(s), the stormwater collection system and/or vegetative conveyance shown on the
approved plan.
e. The construction of any allocated future BUA.
f. The construction of any permeable pavement, #57 stone area, public trails, or landscaping material
to be considered a permeable surface that were not included in the approved plans and
specifications.
g. Other modifications as determined by the Director.
3. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be
repaired immediately.
Page 2 of 5

Post Construction Stormwater Management
Permit No. SW8000243
4. The permittee shall at all times provide the operation and maintenance necessary to assure that all
components of the permitted stormwater system function at design condition. The approved Operation
and Maintenance Agreement is incorporated by reference into this permit and must be followed in its
entirety and maintenance must occur at the scheduled intervals.
5. Records of maintenance activities must be kept and made available upon request to authorized
personnel of the Division. The records will indicate the date, activity, name of person performing the
work and what actions were taken.
6. If the permanent pool volume is greater than 30,000 cubic feet, a decorative spray fountain will be
allowed in the stormwater treatment system, subject to the following criteria:
a. The fountain must draw its water from less than 2' below the permanent pool surface.
b. Separated units, where the nozzle, pump and intake are connected by tubing, may be used only
if they draw water from the surface in the deepest part of the pond.
c. The falling water from the fountain must be centered in the pond, away from the shoreline.
d. The maximum horsepower for a fountain in this pond is 1/3 horsepower.
7. The facilities shall be constructed in accordance with the conditions of this permit, the approved plans
and specifications, and other supporting data.
8. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation
of this permitted facility, the permittee shall cause a certification from an appropriate designer for the
system installed to be submitted, certifying that the permitted facility has been installed in accordance
with this permit, the approved plans and specifications, and other supporting documentation. Any
deviations from the approved plans and specifications must be noted on the Certification. A
modification may be required for those deviations.
9. If the stormwater system is used as an Erosion Control device, it must be restored to design condition
prior to operation as a stormwater treatment device, and prior to occupancy of the facility.
10. All stormwater collection and treatment systems must be located in either public rights -of -way,
dedicated common areas or recorded easements. The final plats for the project will be recorded
showing all such rights -of -way, common areas and easements, in accordance with the approved plans.
Access to the stormwater facilities for inspection and maintenance shall be maintained via appropriate
recorded easements at all times.
12. Prior to transfer of the permit, the stormwater facilities will be inspected by Division personnel. The
project and the stormwater facility must be in substantial compliance with all permit conditions. Any
items not in substantial compliance must be repaired, replaced or restored to design condition prior to
the transfer. Records of maintenance activities performed to date will be required.
13. The Director may notify the permittee when the permitted site does not meet one or more of the
minimum requirements of the permit. Within the time frame specified in the notice, the permittee shall
submit a written time schedule to the Director for modifying the site to meet minimum requirements.
The permittee shall provide copies of revised plans and certification in writing to the Director that the
changes have been made.
III. GENERAL CONDITIONS
CORRECTIVE ACTIONS REQUIRED. If the facilities fail to perform satisfactorily, the permittee shall
take immediate corrective actions. This includes actions required by this Division and the stormwater
rules such as the construction of additional or replacement on -site stormwater systems. These
additional or replacement measures shall receive a permit from the Division prior to construction.
PERMIT RENEWAL. A permit renewal request must be submitted at least 180 days prior to the
expiration date of this permit. The renewal request must include the appropriate application,
documentation and the processing fee as outlined in Title 15A NCAC 02H.1045(3).
Page 3 of 5

Post Construction Stormwater Management
Permit No. SW8000243
3. CHANGES TO THE PROJECT NAME, PERMITTEE NAME OR CONTACT INFORMATION. The
permittee shall submit a completed Permit Information Update Application Form to the Division within
30 days to making any one of these changes.
TRANSFER. This permit is not transferable to any person or entity except after notice to and approval
by the Director. Neither the sale of the project and/or property, in whole or in part, nor the conveyance
of common area to a third party constitutes an approved transfer of the permit.
TRANSFER REQUEST. The transfer request must include the appropriate application,
documentation and the processing fee as outlined in 15A NCAC 02H.1045(2). This request must
be submitted within 90 days of the permit holder meeting one or more of the following:
i. A natural person who is deceased;
ii. A partnership, limited liability corporation, corporation, or any other business association that
has been dissolved,
in. A person or entity who has been lawfully and finally divested of title to the property on which
the permitted activity is occurring or will occur through foreclosure, bankruptcy, or other legal
proceeding.
iv. A person or entity who has sold the property, in whole or in part, on which the permitted
activity is occurring or will occur,
V. The assignment of declarant rights to another individual or entity;
vi. The sale or conveyance of the common areas to a Homeowner's or Property Owner's
Association, subject to the requirements of NCGS 143-214.7(c2);
b. TRANSFER INSPECTION. Prior to transfer of the permit, a file review and site inspection will be
conducted by Division personnel to ensure the permit conditions have been met and that the project
and the on -site stormwater system complies with the permit conditions. Records of maintenance
activities performed to date may be requested. Projects not in compliance with the permit will not be
transferred until all permit and/or general statute conditions are met.
5. COMPLIANCE. The permittee is responsible for compliance with the terms and conditions of this
permit until the Division approves the transfer request.
a. APPROVED PLANS AND SPECIFICATIONS. A copy of this permit, approved plans,
application, supplement, operation and maintenance agreement, all applicable recorded
documents, and specifications shall be maintained on file by the permittee at all times.
b. DIVISION ACCESS. The permittee grants Division Staff permission to enter the property during
normal business hours to inspect all components of the permitted project.
c. ENFORCEMENT. Any individual or entity found to be in noncompliance with the provisions of a
stormwater management permit or the requirements of the stormwater rules is subject to
enforcement procedures as set forth in NCGS 143 Article 21.
d. ANNUAL CERTIFICATION. The permittee shall electronically submit to the Division an annual
certification completed by either the permittee or their designee confirming the projects
conformance with permit conditions
e. OBTAINING COMPLIANCE. The Director may notify the permittee when the permitted site
does not meet one or more of the minimum requirements of the permit. Within the time frame
specified in the notice, the permittee shall submit a written time schedule to the Director for
modifying the site to meet minimum requirements. The permittee shall provide copies of
modified plans and certification in writing to the Director that the changes have been made.
OTHER PERMITS. The issuance of this permit does not preclude the permittee from complying
with and obtaining any other permits or approvals that are required for this development to take
place, as required by any statutes, rules, regulations, or ordinances, which may be imposed by
any other Local, State or Federal government agency having jurisdiction. Any activities
undertaken at this site that cause a water quality violation or undertaken prior to receipt of the
necessary permits or approvals to do so are considered violations of NCGS 143-215.1, and
subject to enforcement procedures pursuant to NCGS 143-215.6.
Page 4 of 5

Post Construction Stormwater Management
Permit No. SW8000243
Permit renewed, updated, and reissued this the 231 day of January 2023.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
l �tY� ?qWG(
Douglas R. Ansel, Interim Director
Division of Energy, Mineral and Land Resources
By Authority of the Environmental Management Commission
Page 5 of 5

Post Construction Stormwater Management
Permit No. SW8000243
Attachment A
Quality Chemical Labs — Facility Expansion
Stormwater Permit No. SW8 000243 MOD
New Hanover County
Designer's Certification
I, , as a duly registered in the State of North Carolina,
having been authorized to observe (periodically/ weekly/ full time) the construction of the project,
(Project)
for (Project Owner) hereby state that, to the best of my abilities,
due care and diligence was used in the observation of the project construction such that the construction was
observed to be built within substantial compliance and intent of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specifications:
Signature
Registration Number
Date
SEAL
Page 1 of 2

Attachment C- Permitting History
Quality Chemical Labs Facility Expansion
Permit No. SW8 000243
Approval
Permit Action
BIMS
Description of the Changes
Modified Plan Sheets
Date
Version
Low Density Stormwater Project -construction, operation
and maintenance of a 30% low density development with
a curb outlet system in compliance with the provisions of
15A NCAC 2H .1000. This permit covers the
construction of 58,370 square feet of built -upon area.
The overall tract built upon area percentage for the
Original
project must be maintained at 30%, as required by
5/5/2000
Approval
1.0
Section .1005 of the stormwater rules. This project.
proposes a curb outlet system. Each designated curb
outlet swale shown on the approved plan must be
maintained at a minimum of 100' long with 5:1 (H: V)
side slopes or flatter, have a longitudinal slope no
steeper than 5%, carry the flow from a 10 year storm in a
non -erosive manner, and maintain a dense vegetated
cover.
Low Density Stormwater Project -construction, operation
and maintenance of a 30% low density development in
compliance with the provisions of 15A NCAC 21-1 .1000.
This permit covers the construction of 58,803 square feet
of built -upon area. The overall tract built upon area
percentage for the project must be maintained at 30%, as
2/26/2002
Major
1.1
required by Section .1005 of the stormwater rules. This
C I
Modification
project proposes a curb outlet system. Each designated
curb outlet Swale shown on the approved plan must be
maintained at a minimum of 100' long with 5:1 (H:V)
side slopes or flatter, have a longitudinal slope no steeper
than 5%, carry the flow from a 10 year storm in a non -
erosive manner, and maintain a dense vegetated cover.
Ownership Transfer -The Division is hereby notifying you
I/24/2014
Minor
1.2
that the project name for the subject permit has been
CI-C2
Modification
changed and the subject permit has been transferred on
January 24,2014.
Page 1 of 2

1/27/2014
Minor
Modification
1.3
Plan Revision -Currently, there is an existing 20,800
square feet of building area, 34,128 square feet of
parking area, and 3,875 square feet of sidewalks, yielding
a total existing impervious area of 58,803 square feet for
the lot. This lot has recorded deed restrictions which
allow 74.749 square feet of impervious area to be built.
This project proposes an additional 11,000 square feet;
therefore the remaining allowable BUA for the future
will be 4,946 square feet. It has been determined that a
formal permit modification is not required for the
proposed changes.
High Density Wet Detention Pond Project -construction,
operation and maintenance of one (1) wet detention pond
in compliance with the provisions of 15A NCAC 2H
.1000 and Session Law 2008-211.approved for the
management of stormwater runoff as described in Section
1.6 of this permit. The runoff from all built -upon area
within the permitted drainage area(s) of this project must
be directed into the permitted stormwater control
system(s). The stormwater control has been designed to
handle the runoff from 170,000 square feet of impervious
3/13/2015
Major
1.4
area. The maximum built -upon area allowed for the entire
CI-C8
Modification
project is 170,000 square feet. The drainage area(s) will
be limited to the amount(s) of built -upon area indicated in
Sections 1.2 and 1.6 of this permit, and per approved
plans. The built -upon area for the future development is
limited to 14,592 square feet. The following
modification is covered by this permit: Approximately 9
acres will be graded to allow construction of a new
building expansion with drives and parking. The
stormwater runofffrom 3.9 acres of built -upon area
(BUA), including existing BUA, will be directed to a
storm water detention pond
1/23/2023
Renewal
2.0
New expiration date 3/13/2031
Page 2 of 2

;. Project Name:IQuality Chemical Labs -.Facility Expansion
Project Location:13220 Corporate Drive, Wilmington, NC
Maintenance records shall be kept on the following BMP(s). This maintenance record shall be kept in a log in a known set locatlo
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 pollutant removal efficiency of the BMP(s).
The BMP(s) on this project include (check all that apply & come.
Bioretention Cell
Quantity:
Dry Detention Basin
Quantity:
.
Grassed Swale
Quantity:
Green Roof
Quantity:
Infiltration Basin
Quantity:
Infiltration Trench
Quantity:
Level Spreader/VFS
Quantity:
Permeable Pavement
Quantity:
Proprietary System
Quantity:
Rainwater Harvesting
Quantity:
Sand Filter
Quantity:
Stormwater Wetland
Quantity:
Wet Detention Basin
Quantity:
Disconnected Impervious Area
Present:
User Defined BMP
Present:
1
O&M tables will be added automatically):
Location(s): ,
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s): 1
Location(s):
Location(s):
I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for
each BMP above, and attached O&M tables. I agree to notify NCDENR of any problems with the system or prior to any changes to
the system or responsible party.
Signature:
Responsible Party:
Title & Organization:
Street address:
City, state, zip:
Phone number(s):
Email
Yousry.Sayed
Member/Manager; Pyramid Real Estate Holdings,.LLC
3220 Corporate;Drive
Wilmington, NC 28405
910-79873441
yousry:[e-mail]
Date: 1 I I � I I'/
A, M��f1i q` 1 I��, a Notary Public for the State of N G
v ��//
County of (��� 7Vt� , do hearby certify that CLLSq s0.
personally appeared before me this at_p day of N6re_ Y)by_t- 20. 1` and
acknowledge the due execution of the Operations and Maintenance Agreement .
Witness my hand and official seal,
O&M Manual
? NOTARYMY
COMMISSION EXPIRES
_01 1- 7
s,_'4UBLI0 IkVV,
11/26/2014
Page 1 of 5
Version 1.4

Seal My commission expires 0 95-11
b.
I�.
BY.
STORM-EZ 11/26/2014
Version 1.4 0&M Manual Page 2 of 5

Tp"
hfP„.Wtxket Detention;f?oniMaintenRereetsrwu `,";
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if
one is provided.
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.
BMP element:
Potential problem:
How I will remediate the problem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the BMP
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, and then plant a
erosive gullies have formed.
ground cover and water until it is established. Provide lime and a one-
time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of approximately six inches.
long.
The inlet device
The pipe is clogged.
Unclog the pipe. Dispose of the sediment off -site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the swale if necessary to smooth it over and provide erosion
swale.
control devices such as reinforced turf matting or riprap to avoid future
problems with erosion.
Stone verge is clogged or
Remove sediment and replace with clean stone.
covered in sediment (if
applicable).
The forebay
Sediment has accumulated to
Search for the source of the sediment and remedy the problem if
a depth greater than the
possible. Remove the sediment and dispose of it in a location where it
original design depth for
will not cause impacts to streams or the BMP.
sediment storage.
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 spraying.
The vegetated shelf
Best professional practices
Prune according to best professional practices
show that pruning is needed
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the problem: soils, hydrology, disease, etc.
dying.
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.
STORM-EZ
Version 1.4
O&M Manual
JAN 18 1015
11/26/2014
Page 3 of 5

Wet!Detention'Pond�Maintenance'Requirements=(Continued )
The main treatment area
Sediment has accumulated to
Search for the source of the sediment and remedy the problem if
a depth greater than the
possible. Remove the sediment and dispose of it in a location where it
original design sediment
will not cause impacts to streams or the BMP.
storage depth.
Algal growth covers over 50%
Consult a professional to remove and control the algal growth.
ofthe area.
Cattails, phragmites or other
Remove the plants by wiping them with pesticide (do not spray).
invasive plants cover 50% of
the basin surface.
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and consult a professional to remove
beaver activity is present.
beavers.
A tree has started to grow on
Consult a dam safety specialist to remove the tree.
the embankment.
An annual inspection by an
Make all needed 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 Department of Environment and Natural
damage have occurred at the
Resources Regional Office.
outlet.
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.
E C E 9 V EN
1AN 2 8 2015
STORM-EZ 11126/2014
Version 1.4 O&M Manual Page 4 of 5

I Wet Detention Pond Design Summary I
• Wet Pond Diagram
WET POND ID FOREBAY MAIN POND
FPermanent Pool El. 35.5 Permanent Pool El. M
Temporary Pool El: 36.1 Temporary Pool ElPretreatment other NoClean Out Depth: 6 Clean Out Depth:than forebay? Sediment Removal El: 29.5 Sediment Removal El:Has Veg. FilteR No Bottom Elevation: 27.5 Bottom Elevation:
CCEI V E
MAR 0 2 2015
STORM-EZ 2/26/2015
Version 1.4 O&M Manual Page 1 of 1

r
DEMLR USE ONLY
Date eceiv d
Fee Paid
Permit Number
Su)s coo ay.)
NC DEQ Division of Energy, Mineral and Land Resources
STATE STORMWATER:
PERMIT RENEWAL APPLICATION FORM
In accordance with 15A NCAC 2H.1045(3) the current permit holder shall renew their high density permit 180 days
prior to its expiration. Renewed permits are valid for a period of 8 years per Session Law 2011-398 (SB 781)
Section 60.(c). This application form is for permit renewals only.
A. PROJECT INFORMATION
1. State Stormwater Permit Number: SW8 000243
2. Project name: Quality Chemical Laboratories
3. Project street address: 3220 Corporate Drive
City: Wilmington, NC
County: New Hanover
4. What, if any, changes have been made to the project as permitted? None
ZIP : 28405
If the project has changed from the original approved plans, please complete SWU-101 for a Major
Modification or Minor Modification Application form available at https:7%deg.nc.gov/about/divisions/e
B. PERMITTEE INFORMATION
If changes to the permittee or project name have been made, please complete either the Permit Update form
or the Permit Transfer form available at: https:/Ideg.nc.gov/about/divisions/energy-mineral-land-
resources/energy-mineral-land-rules/stormwater-Drogram/post-construction. State Stormwater Permits do not
automatically transfer with the sale of the property.
1. Current Permit Holder's Company Name/Organization: Pyramid Real Estate Holdings, LLC
2. Signing Official's Name: Yousry Sayed
3. Signing Official's Title: Manager
4. Mailing Address: 6266 Mallard Drive
City: vvtimington State: NC ZIP : 28403
5. Street Address: 6266 Mallard Drive
City: Wilmington State: NC ZIP : 28403
6. Phone: ( ) Email: yousry.sayed@qualitychemlabs, corn
'% ,
JAN I? 2013 J
RY�'
Stormwater Permit Renewal Form Page 1 of 3 May 11, 2018

a
C. SUBMITTAL REQUIREMENTS
Submit the application package to the appropriate DEMLR Regional Office (Coastal, SA Waters) or DEMLR
Central Office (Urbanizing Areas Ph 2, USMP, Non -Coastal HQW/ORW). Only applications packages that
include all required items listed below will be accepted and reviewed.
Initial each item below to indicate that the required information is provided in the application package:
1. A permit application processing fee of $505.00 payable to NCDEQ.
2. One original signed hard copy and one electronic copy of this completed form. The signing official
named on this application to represent the current permittee must meet one of the following:
a. Corporation — a principle executive officer of at least the level of vice-president;
b. Limited Liability Company (LLC) — a manager or company official as those terms are defined
in G.S. 57D "North Carolina Limited Liability Company Act;"
c. Public Entity — a principal executive officer, ranking official, or other duly authorized employee;
d. Partnership or limited partnership — the general partner;
e. Sole proprietor; or
f. Letter of authorization signed by one of the signatories noted in a — e above authorizing the
signature of another entity.
n{ 3. One hard copy and one electronic copy of recorded documents required by the original permit that
have not yet been received by DEMLR, including: deed restrictions, protective covenants,
condominium/planned community declaration and easements. If the project has been built, include
documentation that the maximum BUA per lot or maximum total BUA has not been exceeded. If
the project has not been built, include a signed agreement that the final recorded deed restrictions
and protective covenants will be submitted at a later date.
4. O& greements, Please select one:
Ihave a copy of the current recorded O&M Agreement for all SCMs, and I will continue to
keep this on file with the permit; or
❑ I do not have a copy of the current recorded O&M Agreement for all SCMs and am
requesting a copy be sent to me. I agree to keep this on file with the permit.
5. Designer Certifications, Please select one:
[� A copy of the certification(s) confirming that the project was built in accordance with the
approved plans have been previously provided to the Division; or
❑ A copy of the certification(s) confirming that the project was built in accordance with the
approved plans are enclosed; or
❑ The project has not yet been built.
6. [IF APPLICABLE] If the project has been built, one original hard copy and one electronic copy of a
signed, sealed, and dated letter from a licensed professional stating that the SCMs have been
inspected, and that they have been built and maintained in accordance with the permit.
7. [IF APPLICABLE] When the permittee is a corporation or a limited liability corporation (LLC):
Provide one hard copy and one electronic copy of documentation from the NC Secretary of State,
or other official documentation, which supports the titles and positions held by the persons listed in
Section C.2 per 15A NCAC 2H. 1043(3)(b).
https://www.sosnc.gov/online services/search/by title/ Business Registration
d
JAN 17 2023
Stormwater Permit Renewal Application Form Page 2 of 3 May 11, 2018

D. PERMITTEE'S CERTIFICATION
Yousry Sayed
1, , the person legally responsible for the permit, certify that I have
a copy of the Permit and O&M Agreement on site (or I will obtain a copy and it will be kept on site), that I am
responsible for the performance of the maintenance procedures, and the site has been and will be maintained
according to the O&M Agreement and approved plans. I agree to notify DEMLR of any problems with the SCMs
or built -upon area and to submit the proper forms to modify or transfer the permit prior to any changes to the
project, SCMs, or ownership. All in ormation provided on this permit renewal application is, to the best of my
knowledge, correct and complete.
Signature: Date: f 2 !S Z_ U 2
NOTARIZATION:
I, \V-A Y) It lam- C , a Notary Public for the State of
rl-h COTDIit\a County of �f'fy-t l mover do hereby certify
that `(UcSr<q Sc��qed personally appeared before me
this the day of Deeer.nhlLr 20 22 , and acknowledge the due
execution of the forgoing instrument. Witness my hand and official seal,
(Notary Seal)
Notary Signature: iC t� a
My commission expires 01-I.Q Ij- 19^7
0
NOTARY y'
MY
COMMISSION EXPIRES
I� 'OUBUG q�U
JAN 17 2023 i
BY:
Stormwater Permit Renewal Application Form Page 3 of 3 May 11, 2018

Permit No. /
(to be povided by DWO)
TC)�
F W ATE9OG
NC ENR
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part III) must be printed, filled out and submitted along with all of required information.
I. PROJECT INFORMATION ' - "
" " '" `- - ' -I I 11,
Project name
Quality Chemical Labs- Facility Expansion
Contact person
J. Phillip Norris, P.E. I Norris 8 Tunstall Consulting Engineers, P.C.
Phone number
910-287-5900
Date
1012015
Drainage area number
1
II. DESIGN INFORMATION.
Site Characteristics
Drainage area
290,000 ft'
Impervious area, post -development
170.000 ft'
%impervious
58.62 %
Design rainfall depth
1.5 in
Storage Volume: Non-SAWaters
Minimum volume required
20,938 ft'
Volume provided
23,350 ft'
OK, volume provided is equal to or in excess of volume required.
Storage Volume: SAWaters
1.5" runoff volume
ft'
Pre -development 1-yr, 24-hr runoff
ft3
Post -development 1-yr, 24-hr runoff
ft3
Minimum volume required
ft3
Volume provided
ft3
Peak Flow Calculations
Is the prelpost control of the lyr 24hr storm peak fim required?
1-yr, 24-hr rainfall depth
Rational C, pre -development
Rational C, post -development
Rainfall intensity: 1-yr, 24-hr storm
Pre -development 1-yr, 24-hr peak flow
Post -development 1-yr, 24-hr peak flow
Pre/Post 1-yr, 24-hr peak flow control
Elevations
Temporary pool elevation
Permanent pool elevation
SHWT elevation (approx. at the perm. pool elevation)
Top of 10ft vegetated shelf elevation
Bottom of 1 Oft vegetated shelf elevation
Sediment cleanout, top elevation (bottom of pond)
Sediment cleanout, bottom elevation
Sediment storage provided
Is there additional volume stored above the state -required temp. pool?
Elevation of the top of the additional volume
Y (Y or N)
3.7 in
0.20 limitless)
0,64 (unidess)
0.16 inim OK
2.56 ft/sec
8.18 ft'/Sec
5.62 ft/sec
36.10 fmsl
35.50 fmsl
35.50 fmsl
36.00 fmsl
35.00 fmsl
Data not needed for calculation option #1, but OK if provided.
32.50 fmsl
31.50 fmsl
Data not needed for calculation option #1, but OK If provided.
1.00 It
N (Y or N)
fmsl
EcF-pv
JAN 2 S 2015
BY:
Form SW401-Wet Detention Basin-Rev.e-4118112 Pans I. 811, Design Summary, Page 1 of 2

Permit
(to be Provided by DWO)
II. DESIGN INFORMATION' -
Surface Areas
Area, temporary pool 42,012 fe
Area REQUIRED, permanent pool
19,894 ft'
SAIDA ratio
6.86 (unitless)
Area PROVIDED, permanent pool, Ate,,, �,
34,953 ft'
OK
Area, bottom of 10ft vegetated shelf, Ay.L,,a,
27,556 ft'
Area, sediment cleanout, top elevation (bottom of pond), A. mrd
23,630 ft'
Volumes
Volume, temporary pool
23,350 ft'
OK
Volume, permanent pool, Vn -P el
97,171 ft3
Volume, forebay (sum of forebays if more than one forebay)
18,390 ft3
Forebay %of permanent pool volume
18.9% %
OK
SAIDA Table Data
Design TSS removal
90 %
Coastal SAIDA Table Used?
Y (Y or N)
MountaiNPiedmonl SAIDA Table Used?
N (Y or N)
SAIDA ratio
6.86 (unitless)
Average depth (used in SAIDA table):
Calculation option 1 used? (See Figure 10-2b)
Y (Y or N)
Volume, permanent pool, Vp, vw
97,171 ft'
Area provided, permanent pool, Ap,m,,
34,953 ft'
Average depth calculated
2.78 It
Need 3 ft min.
Average depth used in SAIDA, dw, (Round to nearest 0.5ft)
3.0 ft
OK
Calculation option 2 used? (See Figure 10-2b)
N (Y or N)
Area provided, permanent pool, A� "
34,953 ft'
Area, bottom of 10ft vegetated shelf, Aw ,,a,
27,556 ft'
Area, sediment cleanout, top elevation (bottom of pond), Aye �„d
23,630 ft'
'Depth" (distance blw bottom of 10ft shelf and top of sediment)
2.50 ft
Average depth calculated
2.78 ft
Need 3 ft min.
Average depth used in SAIDA, d., (Round to down to nearest 05ft)
3.0 ft
OK
Drawdown Calculations
Drawdown through onfce?
Y (Y or N)
Diameter of orifice (if circular)
3.00 in
Enter either diameter of orifice
or area of non -circular orifice. Do not enter
Area of orifice (if -non -circular)
0.00 in'
both diameter and area for a circular
orifice.
Coefficient of discharge (Cu)
0.60 (unitless)
Driving head (Ho)
0.20 It
Drawdown through weir?
N (Y or N)
Weir a
(nitless)
- C E I E
:.
Coefficient of discharge (C,)
0.6 limitless)
Length of weir (L)
It
JAN 8
Driving head (H)
It
2 2015
I
Pre -development 1-yr, 24-hr peak flow
2.56 ft/sec
Post -development 1-yr, 24-hr peak flow
8.18 tt3lsec
BY:
Storage volume discharge rate (through discharge orifice or weir)
0.11 ft`/sec
Storage volume drawdown time
2.30 days
OK, draws down in 2-5 days.
Additional Information
Vegetated side slopes
4 :1
OK
Vegetated shelf slope
10 :1
OK
Vegetated shelf width
10.0 It
OK
Length of flowpath to width ratio
5 :1
OK
Length to width ratio
4.5 :1
OK
Trash rack for overflow & onfice?
Y
(Y or N)
OK
Freeboard provided
1.9 It
OK
Vegetated filter provided?
Recorded drainage easement provided?
N
NIA
(Y or N)
(Y or N)
OK 1 ^
OK ��'� "��,rr1�'Y\)�{?.fC«(, C�•I
Capures all runoff at ultimate build -out?
Y
(Y or N)
I
OK v 1�.w✓V��J\Jl�lh
Drain mechanism for maintenance or emergencies is:
Pump Out
Form SW401-Wet Detention Basin-Rev.9-4/18112 Paris I. S 11 Design Summary, Page 2 of 2

Permit
(to be provided by DWQ)
Ill. REQUIRED ITEMS CHECKLIST -
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 been met, attach justification.
��
A
Page/ Plan
Sh
C7
Plans (V - 50' or larger) of the entire site showing:
- Design at ultimate build -out,
- Off -site drainage (if applicable),
- Delineated drainage basins (include Rational C coefficient per basin),
- Basin dimensions,
Pretreatment system,
High flow bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROW),
Overflow device, and
Boundaries of drainage easement.
2. Partial plan (1" = 30' or larger) and details for the wet detention basin showing:
- Outlet structure with trash rack or similar,
- Maintenance access,
- Permanent pool dimensions,
- Forebay and main pond with hardened emergency spillway,
- Basin cross-section,
- Vegetation specification for planting shelf, and
- Filter ship.
3. Section view of the wet detention basin (1" = 20' or larger) showing:
Side slopes, 3:1 or lower,
Pretreatment and treatment areas, and
/ p Inlet and outlet structures.
C6 w, 4. If the basin is used for sediment and erosion control during construction, clean out of the basin is specified
on the plans prior to use as a wet detention basin.
5. A table of elevations, areas, incremental volumes & accumulated volumes for overall pond and for Forebay,
to verify volume provided.
l (P I GJ 6. A construction sequence that shows how the wet detention basin will be protected from sediment until the
/ entire drainage area is stabilized.
C /X05 7. The supporting calculations.
✓ 8. A copy of the signed and notarized operation and maintenance (0&M) agreement.
9. A copy of the deed restrictions (if required).
10. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. County
soil maps are not an acceptable source of soils information.
IECF—i @M E
JAN 2 8 2015
Form SW401-Wet Detention Basin-Rev.9-4/18/12 Part III. Required Items Checklist, Page 1 of 1

Permit No. SW8 000M MOD
Quality Chemical Labs - Facility Expansion
Stormwater Permit No. SW8 000243 MOD (n�
New Hanover County
Designer's Certification
N&T #14060
1, Joseph K. Bland, P.E. , as a duly registered Professional Engineer in the State
of North Carolina, having been authorized to observe (periodically/ weekly/ full time) the
construction of the project,
Quality Chemical Labs - Facility Expansion
(Project)
for Pyramid Real Estate Holdings, LLC (Project Owner) hereby state that, to the best
of my abilities, due care and diligence was used in the observation of the project construction
such that the construction was observed to be built within substantial compliance and intent
of the approved plans and specifications.
The checklist of items on page 2 of this form is included in the Certification.
Noted deviations from approved plans and specifications:
Signat
Registr on Number 041620 NC
Date -7127h(.
SEAL
CAR 04
O°Q�Q FEssiotiq` i
2' Q SEAL
041620
✓0' FMGINE�P FAO,.
, >F...
EGEIV
i
Pane 8 of 9

Permit No. SW8 000243 MOD
Certification Requirements:
�1. The drainage area to the system contains approximately the permitted
acreage.
�2. The drainage area to the system contains no more than the permitted amount
of built -upon area.
3. All the built -upon area associated with the project is graded such that the runoff
drains to the system.
4. All roof drains are located such that the runoff is directed into the system.
5. The outlet structure elevations are per the approved plan.
_(&6. The outlet structure is located per the approved plans.
6�_7. Trash rack is provided on the outlet structure.
(8. All slopes are grassed with permanent vegetation.
� 9. Vegetated slopes are no steeper than 3:1.
�10. The inlets are located per the approved plans and do not cause short-circuiting
of the system.
JSL11. The permitted amounts of surface area and/or volume have been provided.
�12. Required drawdown devices are correctly sized and located per the approved
plans.
4L13. All. required design depths are provided.
4L14. All required parts of the system are provided, such as a vegetated shelf, and a
forebay.
15. The required system dimensions are provided per the approved plans.
,42) 16. All components of the stormwater BMP are located in either recorded common
areas, or recorded easements.
cc: NCDENR-DEMLR Wilmington Regional Office
New Hanover County Building Inspections
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