SW8040318_COMPLIANCE_20130708

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW_73�r�fj?�/g'
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
COMPLIANCE EVALUATION INSPECTION
DOC DATE
YYYYMMDD

Evanston Development Company, LLC
5306 Six Forks Road, Suite 101
Raleigh, NC 27609
[phone]
[phone] (fax)
July 3, 2013
David Cox
Environmental Specialist
NCDENR
127 Cardinal Dr Ext
Wilmington, NC 28405
RE: Stormwater Permit No. SW8 040318
Walgreens
Brunswick County
Dear Mr. Cox.
We are in receipt of your letter of June 10, 2013 regarding Notice of Inspection —
Non Compliant of the above listed Permit. As a result; we have engaged East Coast
Engineering Surveying. P.C. to prepare the scope of required services, coordinate with a
qualified contractor, and supervise the necessary action to resolve the deficiencies. They
should be able to provide us with a time frame for all required services by July 15, 2013.
Please allow this additional time, and we will forward that information to you as soon as
it is received.
If you have any questions, please contact our office at [phone].
Sincerely,
�-/
Ci/� T . AWA—�
James T. Street I1
Manager
Encl: Copy of'6/10/13 Notice
(CEOVE
JUL 0 8 2013
BY:

A�
vg
NCDENtt
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Pat McCrory Thomas A. Reeder
Governor Acting Director
June 10, 2013
Mr. Crayne Howes, Member 1 Manager
Evanston Development Company, LLC
5306 Six Forks Road, Suite
Raleigh, NC 27609
Subject: Notice of Inspection -- Non Compliant
Walgreens
Stormwater Permit No. SW8 040318
Brunswick County
Dear Mr. Howes:
John E. Skvarla, III
Secretary
On May 29, 2013, staff of the Wilmington Regional Office of the Division of Water Quality (DWQ)
inspected Walgreens in Brunswick County to determine compliance with Stormwater Management Permit
Number SW8 040318 issued on March 23, 2004. DWQ file review and site inspection revealed that the
site is not in compliance with the terms and conditions of this permit. Please find a copy of the completed
form entitled "Compliance Inspection Report" attached to this letter, which summarizes the findings of the
recent inspection.
As indicated in the attached inspection report, the following deficiencies must be resolved:
1. Remove all woody vegetation off the pond slopes.
2. Establish permanent grass on the slopes.
3. Maintain access to the outlet structure.
Please inform this Office in writing before July 10, 2013, of the specific actions that will be undertaken and
the time frame that will be required to correct the deficiencies. Failure to provide the requested
information, or to respond to this letter by the due date, may initiate enforcement action including the
assessment of civil penalties of up to $25,000 per day. If a written plan of action is not submitted to this
office by July 10, 2013 then DWQ staff will re -inspect the site and issue a Notice of Violation if the listed
deficiencies have not been addressed.
Please be reminded that if an ownership change, or a name change or a mailing address change has
occurred, it is your responsibility to submit a completed and signed Name/Ownership Change form to the
Division. Please include the name, mailing address and phone number of the party who is now
responsible for this permit. If you have any questions, please contact David Cox at the Wilmington
Regional Office, telephone number [phone].
Sincerely, ,
r r
David Cox
Environmental Specialist
Enc: Compliance inspection Report
GDSldwc: S:IWQSIStormwater\Permits & Projects120041040318HD12013 06 CEI_deficient 040318
cc: WiRO Stormwater File
Georgette Scott
Wilmington Regional Office
127 Cardinal Drive Extension, Wilmington, North Carolina 28405 One
Phone: [phone] FAX: [phone] DENR Assistance:1-877-623-6748 NorthCarolina
Internet www,ncwaterquality.org ]►'Jatur 11
An Equal OppcdunitylAfirrnaUveAcUcnEmployer �/ y LiLif

Compliance Inspection Report
Permit: SW8040318 Effective: 03/23/04 Expiration: 03/23/18 Owner: Evanston Development Company LLC
Project: Walgreens
County: Brunswick 4577 Main St
Region: Wilmington
Contact Person: Crayne Howes
Title:
Directions to Project:
On the SE Corner of US 17 Business and SR 1357
Type of Project: State Stormwater - HD - Detention Pond
Drain Areas: 1 - (Woodward Branch (Charles Branch)) (03-07-59)
C;Sw,HOW)
2 - (Woodward Branch (Charles Branch)) (03-07-59)
C;Sw,HOW)
On -Site Representative(s):
Related Permits:
Inspection Date: 05/29/2013 Entry Time: 11:30 AM
Prlmary Inspector: David W Cox
Secondary Inspector(s):
Reason for Inspection: Routine
Permit Inspection Type: State Stormwater
Facility Status: ❑ Compliant ❑ Not Compliant
Question Areas:
® State Stormwater
(See attachment summary)
Shallotte NC 28459
Phone: [phone]
Exit Time: 12:00 PM
Phone: [phone]
Inspection Type: Compliance Evaluation
Page: i

Permit: SW8040318 Owner - Project: Evanston Development Company LLC
Inspection Date: 05/29/2013 Inspection Type: Compliance Evaluation Reason for Visit: Routine
Inspection Summary:
Please remove all woody vegetation on the pond slopes and restore grassed slopes.
File Review
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?
Copy of the recorded deed restrictions is in the file?
Yes No NA NE
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: Pond overgrown with trees and sparse vegetationis on slopes
Page: 2

&,A
NC®EN1R
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Pat McCrory
Thomas A. Reeder
Governor
Acting Director
June 10, 2013
Mr. Crayne Howes, Member / Manager
Evanston Development Company, LLC
5306 Six Forks Road, Suite
Raleigh, NC 27609
Subject: Notice of Inspection — Non Compliant
Walgreens
Stormwater Permit No. SW8 040318
Brunswick County
Dear Mr. Howes:
John E. Skvarla, III
Secretary
On May 29, 2013, staff of the Wilmington Regional Office of the Division of Water Quality (DWQ)
inspected Walgreens in Brunswick County to determine compliance with Stormwater Management Permit
Number SW8 040318 issued on March 23, 2004. DWQ file review and site inspection revealed that the
site is not in compliance with the terms and conditions of this permit. Please find a copy of the completed
form entitled "Compliance Inspection Report" attached to this letter, which summarizes the findings of the
recent inspection.
As indicated in the attached inspection report, the following deficiencies must be resolved:
1. Remove all woody vegetation off the pond slopes.
2. Establish permanent grass on the slopes.
3. Maintain access to the outlet structure.
Please inform this Office. in writing before July 10, 2013, of the specific actions that will be undertaken and
the time frame that will be required to correct the deficiencies. Failure to provide the requested
information, or to respond to this letter by the due date, may initiate enforcement action including the
assessment of civil penalties of up to $25,000 per day. If a written plan of action is not submitted to this
office by July 10, 2013 then DWQ staff will re -inspect the site and issue a Notice of Violation if the listed
deficiencies have not been addressed.
Please be reminded that if an ownership change, or a name change or a mailing address change has
occurred, it is your responsibility to submit a completed and signed Name/Ownership Change form to the
Division. Please include the name, mailing address and phone number of the party who is now
responsible for this permit. If you have any questions, please contact David Cox at the Wilmington
Regional Office, telephone number [phone].
f
Sincerely,¢? .9
David Cox
Environmental Specialist
Enc: Compliance Inspection Report
GDSldwc: S:IWQSIStormwater\Permits & Projects120041040318HD12013 06 CEI_deficient 040318
cc: WiRO Stormwater File
Georgette Scott
Wilmington Regional Office
127 Cardinal Drive Extension, Wilmington, North Carolina 28405 One
Phone: [phone] FAX: 910,350-20041 DENR Assistance: 1-877-623-6748 Noi u1Carolina
Internet: www.naxaterquality.org `y '� "/# atura /
An Equal Opportunity IAffirmaUveAdonEmptoyer

Compliance Inspection Report
Permit: SW8040318 Effective: 03/23/04 Expiration, 03/23/18 Owner: Evanston Development Company LLC
Project: Walgreens
County: Brunswick 4577 Main St
Region: Wilmington
Shallotte NC 28459
Contact Person: Crayne Howes Title: Phone: [phone]
Directions to Project:
On the SE Corner of US 17 Business and SR 1357
Type of Project: State Stormwater - HD - Detention Pond
Drain Areas: 1 - (Woodward Branch (Charles Branch)) (03-07-59 ) (
C;Sw,HQW)
2 - (Woodward Branch (Charles Branch)) (03-07-59 ) (
C;Sw,HQW)
On -Site Representative(s):
Related Permits:
Inspection Date: 05/29/2013 Entry Time: 11:30 AM
Primary Inspector: David W Cox
Secondary Inspector(s):
Reason for Inspection: Routine
Permit inspection Type: State Stormwater
Facility Status: ❑ Compliant ❑ Not Compliant
Question Areas:
M State Stormwater
(See attachment summary)
Exit Time: 12:00 PM
Phone: [phone]
Inspection Type: Compliance Evaluation
Page: 1

Permit: SW8040318 Owner - Project: Evanston Development Company LLC
Inspection Date: 05/29/2013 inspection Type: Compliance Evaluation Reason for Visit: Routine
Inspection Summary:
Please remove all woody vegetation on the pond slopes and restore grassed slopes.
Fife 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?
■ ❑
❑
❑
Copy of the recorded deed restrictions is in the file? ❑ ❑ ■ ❑
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 ❑ ❑ ■ 0
upon request?
Comment: Pond overgrown with trees and sparse vegetationis on slopes
Page: 2

r 1
Compliance Inspection Report
Permit: SW8040318
County: Brunswick
Region: Wilmington
Effective: 03/23/04 Expiration: 03/23/18 Owner: Evanston Development Company LLC
Project: Walgreens
4577 Main St
Contact Person: Crayne Howes Title:
Directions to Project:
On the SE Corner of US 17 Business and SR 1357
Type of Project: State Stormwater - HD - Detention Pond
Drain Areas: 1 - (Woodward Branch (Charles Branch)) (03-07-59 ) (
C,Sw,HQW)
2 - (Woodward Branch (Charles Branch)) (03-07-59 ) (
C;Sw,HQW)
On -Site Representative(s):
Related Permits:
Inspection Date: 12/1312013 Entry Time: 10:30 AM
Primary Inspector: David W Cox
Secondary Inspector(s):
Reason for Inspection: Follow-up
Permit Inspection Type: State Stormwater
Facility Status: ■ Compliant n Not Comp#iant
Question Areas:
■ State Stormwater
(See attachment summary)
Shallotte NC 28459
Phone: [phone]
Exit Time: 11:00 AM
Phone: [phone]
Inspection Type: Compliance Evaluation
Page: 1

Permit: SW904031 B Owner - Project: Evanston Development Company LLC
Inspection Date: 12/1312013 Inspection Type: Compliance Evaluation Reason for Visit: Follow-up
Inspection Summary:
Site is in compliance.
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?
Copy of the recorded deed restrictions is in the file?
Comment:
Operation and Maintenance
Yes No NA NE
Yes No NA NE
Are the SW measures being maintained and operated as per the permit requirements? ■ ❑ fl ❑
Are the SW BMP inspection and maintenance records complete and available for review or provided to DWO ii ❑ fl fl
upon request?
Comment:
Page: 2

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lea
NC®ENR
North Carolina Department of Environment and Natural Resources
Division of Energy, Mineral, and Land Resources
Land Quality Section
Tracy E. Davis, PE, CPM
Director
November 12, 2013
CERTIFIED MAIL #7009 1410 0000 9441 4844
RETURN RECEIPT REQUESTED
Mr. Crane Howes, Member Manager
Evanston Development Company, LLC
5306 Six Forks Road, Ste. 101
Raleigh, NC 27609
Subject: NOTICE OF VIOLATION, NOV-2013-PC-0422
Walgreens
Stormwater Permit No. SW8 040318
Brunswick County
Dear Mr. Howes:
Pat McCrory, Govemor
John E. Skvarla, III, Secretary
On November 6, 2013, Wilmington Regional Office personnel performed a Compliance
Inspection of the subject project, located at 4577 Main St, Brunswick County, North Carolina. A
copy of the compliance inspection report was sent to you on June 10, 2013. A follow-up
Compliance Inspection was conducted on November 6, 2013. The inspection was performed to
determine the status of compliance with Stormwater Permit Number SW8 040318, issued to you
on March 23, 2004
The project has been found in violation of Stormwater Permit Number SW8 040318, issued
pursuant to the requirements of the stormwater rules, 15A NCAC 2H.1000. The violations found
are:
1. Failure to Maintain the Stormwater System. Per Section 11.3 of the permit, the
Permittee shall provide the operation and maintenance necessary to assure the permitted
stormwater system functions at optimum efficiency. It was observed that vegetation
maintenance including weed removal, mowing of vegetation, and debris removal from catch
basins were not being conducted. In addition, access to the outlet structure is not being
maintained.
As also stated in the permit, the approved Operation and Maintenance Plan must be
followed in its entirety and maintenance must occur at the scheduled intervals, including,
but not limited to:
• Routine monthly inspections;
- Sediment Removal, -
Mowing and re -vegetation of side slopes;
;> Immediate repair of eroded areas;
' Maintenance of side slopes in accordance with the approved plans and
specifications;
• Debris removal and unclogging of the outlet structure, orifice device and
catch basins and piping;
• Access to the outlet / bypass structure must be available at all times.
Wilmington Regional Office
127 Cardinal Drive Extension, Wilmington, North Carolina 28405 Phone: [phone] Fax [phone]

To correct these violations you must:
1. Mow the side slopes.
2. Maintain access to the outlet structure.
3. Establish permanent grass cover.
Please provide a "Plan of Action" upon 30 days receipt of this Notice, to this office that states
how and when these violations will be corrected. If we do not receive your plan of action by this
date you will be in violation of 15A NCAC 2H.1000, which could result in the initiation of
enforcement action which may include recommendations for the assessment of civil penalties,
pursuant to NCGS 143-215.6A.
If you have any questions concerning this matter, please call David Cox at (910)-796-7230.
Sincerely,
For Tracey . Davis, PE, Director
Division of Energy, Mineral and Land Resources
GDSldwc: G:IWQSIStormwater\Permits & Projects120041040318HD12013 11 NOD 040318
cc: Georgette Scott
WiRO Stormwater File

J A
Compliance Inspection Report
Permit: SW8040318 Effective: 03/23/04 Expiration: 03/23/18 Owner: Evanston Development Company LLC
Project: Walgreens
County: Brunswick 4577 Main St
Region: Wilmington
Contact Person: Crayne Howes Title:
Directions to Project:
On the SE Corner of US 17 Business and SR 1357
Type of Project: State Stormwater - HD - Detention Pond
Drain Areas: 1 - (Woodward Branch (Charles Branch)) (03-07-59)
C;Sw,HQW)
2 - (Woodward Branch (Charles Branch)) (03-07-59)
C;Sw,HQW)
On -Site Representative(s):
Related Permits:
Inspection Date: 11/06/2013 Entry Time: 12:00 PM
Primary Inspector: David W Cox
Secondary Inspector(s):
Reason for Inspection: Follow-up
Permit Inspection Type: State Stormwater
Facility Status: ❑ Compliant ® Not Compliant
Question Areas:
® State Stormwater
(See attachment Summary)
Shallotte NC 28459
Phone: [phone]
Exit Time: 12:30 PM
Phone: [phone]
Inspection Type: Compliance Evaluation
Page: 1

. ..
Permit: SW8040318 Owner - Project. Evanston Development Company LLC
Inspection Date: 11/06/2013 Inspection Type: Compliance Evaluation Reason for Visit: Follow-up
Inspection Summary:
Provide a finish date for the requested work.
Operation and Maintenance Yes No NA NE
Are the SW measures being maintained and operated as per the permit requirements? I�l ■ fl fl
Are the SW BIVIP inspection and maintenance records complete and available for review or provided to DWO 0 Q Q ■
upon request?
Comment: Work has not been completed as requested in June 10, 2013 notice of
inspection.
Page: 2

Permit No —
(to � ()`6 d 3 i -
(to be Provided big DiVO)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
WET DETENTION BASIN SUPPLEMENT
This form moll- be photocopied for use as an original
DWQ Stormwater Management Plan Review:
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
I. PROJECT INFORNIATION
Project Name: _ Walgreens _
Contact Person: Phone Number: [phone]
For projects with multiple basins, specify which basin this worksheet applies to: Pond I
elevc11ion.5•
Basin Bottom Elevation
Permanent Pool Elevation
Temporary Pool Elevation
areas
Permanent Pool Surface Area
Drainage Area
Impervious Area
vohnnes
Permanent Pool Volume
Temporary Pool Volurne
Forebay Volume
01her parcuneier.5
SA/DAi
Diameter of Orifice
Design Rainfall
Design TSS Removal 2
1.0 ft. (floor of the basin)
7.0 ft. (elelw iolt of the orifice)
8.0 ft. (elevation of the cli.sch(u•ge structure overflow)
7,400 sq. ft. (+eater .staface area ca the orifice elevcition)
2.38 ac. (on -site and (?ff-site dretinage to the &t.yin)
1.91 ae. (on -.site and aff-site c1r(inage to the bctsin)
14 141 _ . Cu. ft. (combined volume of inctin basin and forebcry)
8.195 cu. ft. (volume detained ahove the pernicnlent pool)
2,828 cu. ft. (crpproxintalel)) 20% (?f total volume)
0.70 (Yudf tce ctrect to dretiliage area ratio frolll DWO mthle)
1.0 in. (2 to 5 dct)% tetttporary pool drain -down required)
l.0 in.
90 % (witttttntm 85% require(l)
Farm SWU-102 Rev 3.99 Page 1 of 4

Footnotes:
1 When using the Division SAIDA tables, the correct SAIDA ratio for permanent pool sizing should be computed based upon the
actual tmpen,ious % and permanent pool deptli. Linear interpolation should be employed to determine the correct value for noel
standard table entries.
2 In the 20 coastal counties. (lie requirement for a vegetative filter may be «vaived if the �%et detention basin is designed to provide
90% TSS removal. The NCDENR BMP manual pro\,ides design (ables for both 85°/o TSS removal and 90% TSS removal.
H. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section; 15 A _TNCAC 2H .1005.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
a.
4' b
d.
e.
4'
9
f.
Thepermanentpool depth is between 3 and 6 feet (required minimum of 3 feet).
The forebay volume is approximately equal to 20% of the basin volume.
The temporary pool controls runoff from the design storm event.
The temporary pool draws down in 2 to 5 days.
If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
The basin length to width ratio is greater than 3:1.
g. The basin side slopes above the permanent pool are no steeper than 3:1.
A submerged and vegetated perimeter shelf with a slope of 6:1 or less (show detail).
Vegetative cover above the permanent pool elevation is specified.
A trash rack or similar device is provided for both the overflow and orifice.
k. A recorded drainage easement is provided for each basin including access to nearest right-of-
�� way.
1. if the basin is used for sediment and erosion control during construction, clean out of the
basin is specified prior to use as a wet detention basin.
m. A mechanism is specified which will drain the basin for maintenance or an emergency.
ILI. WET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the
vegetated filter if one is provided. y
This system (check one) 0 does 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does 0 does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of

Mainteoance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the 'original design depth (see diagram below), Removed sediment shall be disposed of
in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e.
stockpiling near a wet detention basin or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not feadily penetrate into accumulated sediments.
When the permanent pool depth reads 3.0_ feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads _2.25_ feet in the forebay, the sediment shall be removed.
BASIN DIAGRAM
(fill in the blanks)
Permanent Pool Elevation 7.0
Sediment Removal El. _4,75 175%
Sediment Renio\'al Eluation 4.0 V 75
Bottom Ele 'ation,0 2_ /o-------------------�
Bottom Elevation _3.0— 2�
FOREBAV
MAIN POND
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through
the emergency drain shall be minimized to the maximum extent practical.
Form SWU-102 Rev 3.99 Pape 3 of 4

7, All components of the wet detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
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.
Print Name: Cravne Howes
Title: Member Man
Address: _ _5306 Six Forks RoaLSuite 101, Raleigh, NC 27609 _
Phone: [phone]
Signature:
Date: ►AAZC4 l6 2 e
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, L'L Xka— 0. slug // , a Notary Public for the State of North Carolina ,
County of ZUP-Y-C , do hereby certify that �. GrzA r.3 d—t-toc�LES _
personally appeared before me this day of �s ,`1R�, and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
1 A _ // /-)
*0TAIfl,
s
r� puso�
•4 G�
SEAL
My commission expires , —
My Commission Expires April 1.2006
Form SWU-102 Rev 3.99 Page 4 of 4

„stir;
4
f
v ! r
��''i.yr.+e, rs a �• ssssN

Permit No &W S,5 0 03
r
(to be provided b.v DIVQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
VET DETENTION BASIN SUPPLEMENT
Thisform mr{v be photocopied fc?r use as an original
DWQ Storinwater Mana_,ement Plan Review;
A complete stormwater management plan submittal includes an application form, a wet detention basin
supplement for each basin, design calculations, and plans and specifications showing all basin and outlet
structure details.
1. PROJECT INFORMATION
Project Name: Wal-reens
Contact Person: Adam McCura Phone Number: [phone]
For projects with multiple basins, specify which basin this worksheet applies to: Pond 2
elevalioirs
Basin Bottom Elevation
04 VO
ft.
(floor of the basin)
Permanent Pool Elevation'
10.0
ft.
(elevcrtioii of the orifice)
Temporary Pool Elevation
11.0
ft.
(elei�caioll of the di.schurge su-neture or-erfloiv)
areas
Permanent Pool Surface'Area
4323
sq. ft.
(ir-citer sttlfcice area (it the orifice eleiwtion)
Drainage Area
1.26
ae.
(oll-.site rurd (?ff-rile dretim-ige to the basin)
Impervious Area
I. 13
ac.
(oll-site and (?ff-.site clrctiitcrge to the basin)
1,0111111es
Permanent Pool Volume
7,564
cu. ft.
(combined i,ohime of inctln bash! (wd forebcry)
Temporary Pool Volume
4,767
cu. ft.
(volume detained aho+,e the pei-nuneia pool)
Forebay Volume
1,660
cu. ft.
(approximately 20% (f total i,ohtrne)
Olher parameters
SA/DAi _ 0.079 (slrr face area to drainage area ratio from DWO table)
Diameter of Orifice 1.0 in. (2 to 5 clay tenrporcriy pool drenr--do+r,ri regliirecl)
Design Rainfall 1.0 in.
Design TSS Removal 2 90 % (ininimrmi 85%requirecl)
Form SkVU-102 Rev 3.99 Rige I of 4

Footnotes:
I When using the Division SA/DA tabics. the correct SA/DA ratio for permanent pool sizing should be computed based upon the
actual impervious % and permanent pool depth, Linear interpolation should be etuployed to determine the correct value for non
standard table entries.
2 In the 20 coastal counties. the requirement for a vegetative filter may be waived if the net detention basin is designed to provide
90% TSS removal. The NCDENR BMP manual provides design tables for both 85% TSS removal and 90% TSS removal.
II. REQUIRED ITEIVIS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices Manual
(N.C. Department of Environment, Health and Natural Resources, February 1999) and Administrative Code
Section: 15 A NCAC 2H , t008.
Initial in the space provided to indicate the following design requirements have been met and supporting
documentation is attached. If the applicant has designated an agent in the Stormwater Management Permit
Application Form, the agent may initial below. If a requirement has not been met, attach justification.
Applicants Initials
C-a. The permanent pool depth is between 3 and 6 feet (required nninimum of 3 feet).
z--�
b. The forebay volume is approximately equal to 20% of the basin volume.
c. The temporary pool controls runoff from the design storm event.
�✓ d, The temporary pool draws down in 2 to 5 days.
e. If required, a 30-foot vegetative filter is provided at the outlet (include non -erosive flow
calculations)
t " f The basin length to width ratio is ureater than 3:1.
�J
g. The basin side slopes above the permanent pool are no steeper than 3: I.
h. A submerged and vegetated perimeter shelf with a slope of 6; l or less (show detail),
i. Vegetative cover above the permanent pool elevation is specified.
A trash rack or similar device is provided for both the overflow and orifice.
k. A recorded drainage easement is provided for each basin including access to nearest right-of-
way.
I. if the basin is used for sediment and erosion control during construction, clean out of the
basin is specified prior to use as a wet detention basin.
om. A mechanism is specified which will drain the basin for maintenance or an emergency.
I.11. VET DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
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) 0 does 0 does not incorporate a vegetated filter at the outlet.
This system (check one) 0 does 0 does not incorporate pretreatment other than a forebay.
Form SWU-102 Rev 3.99 Page 2 of=4

Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wet detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within
2 to 5 days as designed.
2. Repair eroded areas immediately, re -seed as necessary to maintain good vegetative cover, mow vegetative
cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain
proper functioning.
4. Remove accumulated sediment from the wet detention basin system semi-annually or when depth is
reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of
in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e.
stockpiling near a wet detention basin or stream, etc.).
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 ').0_ feet in the main pond, the sediment shall be removed.
When the permanent pool depth reads _2.25 feet in the forebay, the sediment shall be removed.
BASIN D[AGRANI
6611 in the blanks)
Permatient Pool Elevation 10.0
-•
Sediment Rei oval El. _7.75 75% 1-7- , 0
-------------- --
Sediment Removal Elevation G 75'
Bottoin Ele nlion 7.0 2= /o --`"---------------------------
Bottom Elevation < I 2
FOREBAY NIAIN POND
5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These
plants shall be encouraged to grow along the vegetated shelf and forebay berm.
6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through
the emergency drain shall be minimized to the maximum extent practical.
Farm SWU-102 Rev 3.99 Page 3 of 4

7. All components of the wet detention basin system shall be maintained in good working order.
I acknowledge and agree by my signature below that I am responsible for the performance of the seven
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.
Print Name: Cra ne Howes
Title: Member Manager
Address:.__5306 Six Forks Road -Suite 101,_Rateigh, NC 27609
Phone: [phone]
Signature:
Date: ►V 1 A¢c-µ IF.0 WO+
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, UL -A- ctC"- C . JLr �!
a Notary Public for the State of North Carolina ,
County of ZLL t2r-E _,do hereby certify that . Cr—o., N s — AoW65
personally appeared before me this day of , ` RP_ , and acknowledge the due
execution of the forgoing wet detention basin maintenance requirements. Witness my hand and official seal,
i *OTAR)
s
i AU@i%C Q
COU;('�' tea+
SEAL
My commission expires
My Commission Expires April 1, 2006
Form SWU-102 Rev 3.99 Page 4 of 4

WET DETENTION POND ANALYSIS
FILE NAME: S:IWQSIPOND1040318.mar04.xls
PROJECT #: SW8 040318.mar04 REVIEWER: Laurie Munn
PROJECT NAME: Walgreens DATE: 23-Mar-04
POND 1
Receiving Stream: Woodward Branch Class: C SW HQW
Drainage Basin: Lumber Index No.-2A-B0' �'Z5 �✓
Site Area 6.64 acres
Drainage Area a€9369fi°DO square feet Area in Acres 2.38
IMPERVIOUS AREAS
Rational C
building
14731.00
square feet
streets
4963.00
square feet
parking
52633.00
square feet
sidewalks
1822.00
square feet
off -site
8938.00
square feet
square feet
TOTAL
Iscluare
feet Rational Cc= 0.04
SURFACE AREA CALCULATION
% IMPERVIOUS 80.13%
Des. Depth 4
TSS: 90
VOLUME CALCULATION
Rational ?*
Des. Storm
(
inches
Rv=
0.771
Bottom
3 msl
Perm. Pool
7°DO° msl
Design Pool
8 msl
Storage met @elev 7.81 msl
Req. Volume
s 6664
cf
Vol. Prov. at DP
19.6
cf
FICE CALCULATION
Avg. Head =
Flow Q2, cfs
Flow 05, cfs
No. of Orifices
Diameter, inches
Drawdown =
SAIDA Ratio 7.01
Req. SA 7270 sf
Prov. SA06€ sf
* place a "1" in the box if Rational is used
Perm. Pool Volume=
Req. Forebay Volume=
Provided Volume=
Percent=
Elevation Area
TOG 7400.00
8.00 8989.00
Q2 Area = 1.67
Q5 Area = 0.67
Orifice Area 0.79
Q= 0.018
in x
Surface Area @DP =
Falling Head Drawdown =
COMMENTS
Surface Area , Volume and Orifice are within Design Guidelines.
14141
28282
2828.00
Inc. Vol. Acc. Vol.
8194.50 8194.50
sq. inches
sq. inches
sq, inches
cfs
in
8989 sq. ft.
7.2 days

WET DETENTION POND ANALYSIS
FILE NAME: S:IWQSIPOND1040318.mar04.xls
PROJECT #: SW8 040318.mar04 REVIEWER: Laurie Munn
PROJECT NAME:
Walgreens
DATE:
23-Mar-04
POND 2
Receiving Stream:
Woodward Branch
Class:
C SW HQW
Drainage Basin:
Lumber
Index No.
Z'
Site Area
6.64 acres
Drainage Area
54700'=O! square feet
Area in Acres
1.26
IMPERVIOUS AREAS
Rational C
Future 49200.00
square feet
square feet
square feet
square feet
square feet
square feet
TOTAL 40 00,„
square feet
Rational Cc= 0.02
SURFACE AREA CALCULATION
% IMPERVIOUS
89.95%
SA/DA Ratio
7.90%
Des. Depth
4
Req. SA
4319
sf
TSS:
90
Prov. SA
4N123
sf
VOLUME CALCULATION
* place a "1" in the box if Rational is used
Rational ?*
FOREBAY
Des. Storm
ICJ' inches
_.
Perm. Pool Volume=
7564
Rv=
0.860
Req. Forebay
Volume=
1512.8
Bottom
6 msl
Provided Volume=
1660.00
Perm. Pool
1C0` msl
Percent=:G�'
Design Pool
11 msl
Storage met @elev 10.82 msl
Elevation
Area
Inc. Vol. Acc. Vol.
Req. Volume
3 18;, cf
10.00
4323.00
Vol. Prov. at DP
476 ''' cf
11.00
5211.00
4767.00 4767.00
ORIFICE CALCULATION
Avg. Head =
0.48
ft
Q2 Area = 0.98
sq. inches
Flow Q2, cfs
0.023
cfs
Q5 Area = 0.39
sq. inches
Flow Q5, cfs
0.009
cfs
Orifice Area 0.79
sq. inches
No. of Orifices
0.018
cfs
Diameter, inches
1 CO
weir H x W
in x
ti in
Drawdown =
:2 5;
days
Surface Area @DP =
5211 sq. ft.
Falling Head Drawdown =
4.2 days
COMMENTS
Surface Area , Volume and Orifice are within Design Guidelines

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PS Form 3811, February 2004 Domestic Return Receipt 102595-02-M-1540
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° Sender: Please print your name, address, and ZIP+4 in this box •
NC 0011. Di 90R of Water Resoartes
WATER QVAun Pimps
127 Cardinal Drive Ell.
wurainglon, NC 28M
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