SW8021013_COMPLIANCE_20021216

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW -v- �/%i%i ItAl)l�
DOC TYPE
El CURRENT PERMIT
❑ APPROVED PLANS
❑ HISTORICAL FILE
COMPLIANCE EVALUATION INSPECTION
DOC DATE
1V/,Y1��l�p
YYYYMMDD

Compliance Inspection Report
Permit: SW8021013 Effective: 12/16/02 Expiration: 12/16/16 Owner: Joy Cranidiotis
Project: Belville Point Office Park
County: Brunswick NC 133
Region: Wilmington
Contact Person: Joy Cranidiotis Title:
Directions to Project:
SW corner of NC 133 and SR 1551 in Belville
Type of Project: State Stormwater - HD - Detention Pond
Drain Areas: 1 - (Brunswick River) (03-06-17) ( SC)
On -Site Representative(s):
Related Permits:
Inspection Date: 05/29/2013 Entry Time: 11:45 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:
E Other
(See attachment summary)
Leland NC 28451
Phone: [phone]
Exit Time: 12:00 PM
Phone: [phone]
Inspection Type: Compliance Evaluation
Page: 1

Permit: SW8021013 Owner -Project: Joy Cranidiotis
Inspection Date: 05/29/2013 Inspection Type: Compliance Evaluation Reason for Visit: Routine
Inspection Summary:
Site not constructed. deeds extension letter.
Other
Comment:
Yes No NA NE
Page: 2

State of North Carolina
Department of Environment
and Natural Resources
Wilmington,.RegionalOffice l�
`Di'vision flf"Land Resources . ,�,� '
Land Quality Section 1
Michael F. Easley, Governor
William G. Ross Jr., Secretary
October 8, 2002
NOTICE OF RECEIPT OF EROSION & SEDIMENTATION CONTROL PLAN
Ms. Joy Cranidiotis
1008 Thistle Downs S.E.
Leland, NC 28451
Dear Ms. Cranidiotis:
This office has received a soil erosion and sedimentation control plan for the project listed below which was
submitted as required by the North Carolina Sedimentation Pollution Control Act (NCGS 113A-57(4)).
Please be advised that this Act requires that all persons disturbing an area of one or more acres of land must obtain
approval of a soil erosion control plan prior to the commencement of said land -disturbing activity (NCGS 113A-54(d)(4)).
The Act further states that this plan must be filed a minimum of 30 days prior to the activity and the approving authority must
approve or disapprove the submitted plan within 30 days of receipt. Failure of the approving authority to approve or
disapprove the submitted plan within the 30 day period will be deemed approval of the plan if the submitted plan is complete.
Commencement or continuation of a land -disturbing activity under the jurisdiction of this Act prior to the approval of an
erosion & sediment control plan is a violation of the Act.
A copy of any erosion and sediment control plan which could involve the utilization of ditches for the purpose of
dewatering or lowering the water table is forwarded by this office to the Division of Water Quality (DWQ). It is suggested that
you contact the Division of Water Quality at [phone] if any ditches shown on your plan will lower the water table.
We have performed a preliminary review of your submitted plan and have determined that additional information
will be necessary before a final review can be completed. Enclosed is a checklist of items that must be submitted before
we can complete the review process. Failure to provide the additional information may result,in disapproval of your plan.
The approval `of an erosion and sediment control plan is condition on the applicant's compliance with Federal and
State water quality laws, regulations and rules.
If you have questions or need additional information, please do not hesitate to contact this office. Your cooperation
in this matter is appreciated and we look forward to working with you on this project.
Sincerely,
Carol N. Miller, CPESC
Assistant Regional Engineer
CNM/bfr
cc: Joseph S. Hill & Associates; Joseph S. Hill & Associates
PROJECT NAME: Belville Point Office Park
PROJECT NO.: BR-03088
LOCATION: NC Highway 133 - Brunswick County
RIVER BASIN: Cape Fear
SUBMITTED BY: Joseph S. Hill & Associates
DATE RECEIVED BY L.Q.S.: October 8, 2002
127 North Cardinal Drive, Wilmington, N.C. 28405-3845 • Telephone [phone] • Fax [phone]
An Equal Opportunity Affirmative Action Employer

UNITED STATES
Asa DEPARTMENT OF THE INTERIOR
soot GEOLOGICAL SURVEY
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DETENTION POND ANALYSIS FILE NAME: G:IDATAIWPDATAIWQSIPOND1021013.WK1
PROJECT #: SW8 021013 REVIEWER: L. Lewis
PROJECT NAME: Belville Point Office Park
DATE: 16-Dec-02
Receiving Stream: UT Brunswick River Class: SC
Drainage Basin: CPF Index No. CPF17 18-77
Site Area 1.45 acres
Drainage Area < :...:634.:, square feet Area = 1.45 acres
IMPERVIOUS AREAS
Rational C
Buildings 7824.00 square feet
Parking & SW 34200.00 square feet
square feet
square feet
square feet
square feet
TOTAL 4202400`i square feet Rational Cc= 0.07
SURFACE AREA CALCULATION
J
% IMPERVIOUS
66.51 %
SAIDA Ratio
5,76%
Des. Depth
4
Req, SA
3637 sf
TSS:
90
Prov. SA
`..........<.5895'< sf
VOLUME CALCULATION
Rational ?*
Des. Storm
>.......::.... 17:7.:
inches
Rv=
0.65
Bottom
6 msl
Perm. Pool
.....:..:..:::.::.....1r,;D.O msl
.............
Design Pool
10.8 msl
Design SA
6713 sf
Req. Volume
3415;
cf
Prov. Volume
.........::>.. 5043
cf
ORIFICE CALCULATION
Avg. Head =
Flow Q2, cfs
Flow Q5, cfs
No. of Orifices
Diameter, inches
Drawdown =
0.38
ft
0.020
cfs
0.008
cfs
......;....0..7.5
weir H x W
>.....
days
* place a "1" in the box if Rational is used
Perm. Pool Volume= 17735
Req. Forebay Volume= 3547
Provided Volume= 3578.00
Percent=
SA @ _
Elevation=
Q2 Area =
0.95
sq. in.
Q5 Area =
0.38
sq. in.
Orifice Area
0.44
sq. in.
Q=
0.009
cfs
:::..... i n
x
COMMENTS
Surface Area , Volume and Orifice are within Design GuidelineE
in

BELVILLE POINT OFFICE PARK
BRUNSWICK COUNTY
STORMWATER MANAGEMENT CALCULATIONS
September 2002
RECEIVED
OCT 0 8 2002
DWQ
PROD # sw F Z ro 13
Prepared By:
JOSEPH S. HILL, JR. and ASSOCIATES
CONSULTING ENGINEERS and PLANNERS
1602 Harbour Drive
Wilmington, [forth Carolina 28401
[phone]

Beivilie Point Office Park
Stormwater Management Calculations
TABLE OF CONTENTS
1. Detention Pond Calculations
2. Forebay Calculations
BPOP.SIWTR CALC.doc Page 2 of 14

Belville Point Office Park
Stormwater Management Calculations
BELVILLE POINT OFFICE PARK
Stormwater Detention Pond Calculations
Stormwater runoff from the project will be retained in a wet detention
pond. This pond will store the runoff generated by 1 inch of rainfall. The stored
runoff will be discharged over a period of 4.4 days.
The pond area required to remove 90% of total suspended solids was
calculated using the SA/DA Percentage Chart (see chart) for North Carolina
coastal regions.
Runoff Calculations
Impervious Surfaces -
Buildings, walks streets, parking = 42,024 SF
Total Area 63,184 SF
Total Pervious Area = 21,160 SF
1" Runoff from Impervious Surfaces = 0.0834' x 42,024 SF = 3,505 CF
1" Runoff from Pervious Surfaces = 0.2 x 0.0834' x 21,160 SF = 353 CF
Total runoff to be stored in pond = 3,853 CF
28,934 Gal.
Detention Pond Calculations
Pond Surface area @ Temporary Pool Elev. O N 7' = 6,713 SF
Pond Surface area @ Permanent Pool Elev. Of 10.0' = 5,895 SF ✓
Average Pond Surface Area = 6,304 SF
Pond Storage Volume = 6,304 SF x 0.8' Depth = 5,043 CF
3,853 CF . 5,043 CF = 0.76' Pond Storage Depth Required (use 0.8')
Total Watershed Area = 63,184 SF
Impervious % = 42,024 SF = 63,184 SF = 67%
Pond Depth = 4.0'
BPOP.STWTR CALC.doc Page 3 of 14

Belville Point Office Park
Stormwater Management Calculations
SA/DA % required for 90% solids removal @ 4.0' Depth (see chart) = 5.8%
5.8% x 63,184 SF = 3,665 SF
Pond surface area @ Permanent Pool Elev. Of 10.0' = 5,895 SF
Pond is therefore adequate for 90% TSS removal.
Orifice Discharge Rate Calculations`J°�,�
Use 3/4" diameter orifice for outlet
Calculate average discharge rate and time to lower orifice head from 0.8' to 0.7:
0.1' pond height x 6,304 SF average pond area x 7.5 ga/ft3
= 4,728 Gallons Storage
Average head on orifice from 0.8' to 0.7' = 0.75'
Average discharge rate @ 0.95' head:
Q(GPM) = (449)c A 2gh
Q(GPM) = Volume discharge in gallons per minute
c = discharge coefficient = 0.6
A = orifice area in square feet
g = gravity = 32.2
h = head above center of gravity
Q(GPM) _ (449)(.6)(0.0031) (2)(32.2)(0.75}
Q = 5.8 GPM
Time required to lower pond 0.1' @ 0.75' average head:
T='4,728 Gal. + 5.8 GPM = 815
5.8 GPM vs 815 minutes plotted on curve (see discharge curve).
BPOP.STWTR CAIC.doc
Page 4 of 14

Belville Point Office Park
Stormwater Management Calculations
Discharge rate and time to lower head from 07 to 0.6':
Q = 5.4 GPM
T = 41728 Gal. 5.4 GPM = 876 minutes
5.4 GPM vs 1,691 minutes plotted on curve.
Discharge rate and time to lower head from 0.6' to 03:
Q = 5.0 GPM
T = 4,728 Gal. - 5.0 GPM = 946 minutes
5.0 GPM vs 2,636 minutes plotted on curve.
Discharge rate and time to lower head from 0.5' to 0.4':
Q = 4.5 GPM
T = 4,728 Gal. - 4.5 GPM = 1,050 minutes
4.5 GPM vs 3,686 minutes plotted on curve.
Discharge rate and time to lower head from 0.4' to 03:
Q = 4.0 GPM
T = 41728 Gal. 4.0 GPM = 1,182 minutes
3.4 GPM vs 4,868 minutes plotted on curve.
Discharge rate and time to lower head from 0.3' to 0.2':
Q = 3.4 GPM
T = 4,728 Gal. = 3.4 GPM = 1,390 minutes
3.4 GPM vs 6,258 minutes plotted on curve.
Discharge rate and time to lower head from 0.2' to 0.1':
Q = 2.6 GPM
T = 4,728 Gal. = 2.6 GPM = 1,818 minutes
2.6 GPM vs 8,076 minutes plotted on curve.
Discharge rate and time to lower head from 0.1' to 0.0':
Q = 1.5 GPM
T = 4,728 Gal. . 1.5 GPM = 3,152 minutes
1.5 GPM vs 11,228 minutes plotted on curve.
The outlet structure will discharge the total calculated runoff volume of 156,263
gallons in approximately 4.4 days (see Orifice Discharge Curve).
ePOP.STWTR CALC.doc Page 5 of 14

Belville Point Office Park
Stormwater Management Calculations
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BPOP.STWTR CALC.doc Page 6 of 14

Belville Point Office Park
Stormwater
Management Calculations
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BPOP.SiWTR CALC.doc Page 7 of 14

Belville Point Office Park
Stormwater Management Calculations
Forebay Calculations
Provide approximately 20% of Total Pond volume including area of forebay
construction and temporary pool volume:
Permanent Pool Volume:
Permanent Pool Area @ Elev. 10.0' = 5,895 SF
Pond Area @ Bottom Elev. 6.0' = 450 SF
Pond Average Area -- 3,173 SF
3,173 SF x 4.0' depth = 12,692 CF Permanent Pool Volume
Temporary Pool Volume = 5,043 CF
Total Pond Volume = 17,735 CF
Forebay Volume:
Forebay Area @ Elev. 10.2' = 11485 SF
Forebay Area @ Elev. 6.0' = 220 SF
Forebay Average Area = 852 SF
852 SF x 4.2' Depth = 3,578 CF Forebay Volume
3,578 CF = 17,735 CF = 20.17%
Forebay = 20.2% of Permanent Pond Volume
BPOP,STWTR CALC.doc Page 8 of 14

JOSEPH S. HILL, JR. AND ASSOCIATES
CONSULTING ENGINEERS and PLANNERS
1602 HARBOUR DRIVE
WILMINGTON, NORTH CAROLINA 28401
TELEPHONE [phone]
VAX 910-799-1551
October 7, 2002
Ms. Linda Lewis
N.C.D.E.M.
127 Cardinal Drive Extension
Wilmington, North Carolina 28405
Subject: Stormwater Plan
Belville Point Office Park
Town of Belville
Brunswick County
Dear Ms. Lewis:
Enclosed are three (3) copies of the stormwater plan and calculations for
the subject project. Included is a completed permit application, application fee
of $420.00, Wet Detention Basin Supplement Form, a color -coded plan showing
drainage areas used in calculating pipe sizing, and a copy of the Erosion Control
calculations showing pond outlet sizing and erosion protection.
Please review this plan as soon as possible.
Please do not hesitate to contact me if you have any questions or need
additional information.
JSH/pat
Attachments
BPOP. LEWIS.100202.doc
Sincerely,
JOSEPH S. HILL, JR. and ASSOCIATES
&r.' 5.
Jo h S. Hill, Jr., P.E.