SW8051128_OTHER_20140417 (2)

Weaver, Cameron
From: Tim Clinkscales [[e-mail]
Sent: Thursday, April 17, 2014 1:41 PM
To:. Baker, Chris
Cc: Weaver, Cameron; Dan Fisk
Subject: Express Meeting and Discussion on Another Project
Attachments: image001.jpg; C-2 SITE PLAN SITE PLAN 041714.pdf; Express Stormwater Narrative -
SECTION 6B 041714.pdf; REQUEST FOR EXPRESS O41714.pdf; Map_nhc aerial.pdf;
NCDENR - Stormwater Permitting Map Viewer.pdf
Chris,
I am enclosing the proper information for a modification for Section 613 in St James. Mark Brambell wants to convert
pond 2 on the plan shown to an infiltration basin. We would like to set up a time next week other than Thursday to
submit, if possible.
Also we have another project we would like to discuss, it is a the border between SA and non -SA waters, I am providing
an aerial and the SA waters map from DENR. I have also looked at the distance it is pretty consistent with the map.
Let us know of a time to discuss both projects
Thanks
Tim
Tim Clinkscales PE, PLS
',PARA-MOUNTE
l - ,] , N Y: . 1. 1. ,l , N 1.
PARAMOUNTE ENGINEERING, INC
591 1 Oleander Drive, Suite 201
Wilmington, NC 28403
OFFICE: [phone]
CELL: [phone]
FAX: [phone]
www. oaramounte-eng.com

©�A North Carolina Department of Environment and
Ti Natural Resources
NCDENR Request for Express Permit Review
FILL-IN all the information below and CHECK the Permit(s)
Coordinator along with a completed DETAILED narrative, s
of the project location. Please include this form in the apple
• Asheville Region -A Its on Davidson 828-296469$alison.davitlsonfrIcmaitnor
• Fayetteville or Raleigh Region-DavidLae 9 19- 791.4203; david.leef ibnail.nor
• Mooresville&-Pattick Grogan 704-663-3772 or parrick.monanigncn ilnrl
• Washington Region -Lyn Hardison 252-946-9215 xlin.hardisoncmncmail.net
• Wilmington Region -Janet Russell 910-350.2004 or jam. Err ssehei'ocmod..nM
NOTE: Project application received after 12 noon will be stamped in the following work day.
Far DENR Lig ONLY
subma. ,7��
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Project Name:- SECTION BB—Counly: BRUNSWICK
Applicant: BOBBY MASTERS Company: RESERVE DEVELOPMENT COMPANY.LLC
Address, PO BOX 108791 SOUTHPORT Stale: INC Zip: 28461-
Phone:91Q253-3221 Fax::91P4574713 Email: [e-mail]
Physical Locatlon:INSIDE THE RESERVE AT ST JAMES PLANTATION
Pmject Drains into BEAVER DAM CREEK waters -Water classification SCS. W:HQW(forclassi9cationsera­
him Im2o enr.State. nc.usPoimslumonslleportsWB.hlml
Project Located in CAPE FEAR River Basin. Is project draining to class ORW waters? IN, within R mile and draining to class SA waters N, or within 1 mile
and draining to dam HQW waters? N
EngineerlConsultanl: TIM CUNKSCALES, PE, PLS Company: FARAMOUNTE ENGINEERING, INC.—
Address: 5911 OLEANADER DRIVE Gty: WILMINGTON, State: INC Zip 2ML33-_
Phone: [phone] Fax::[phone] Email: TCLINKSCALES@PARAMOUNTE-ENGCOM—
SECTION ONE: REQUESTING A SCOPING MEETING ONLY
❑ Scoping Meeting ONLY ❑ DWQ, ❑ DCM, ❑ DLR, ❑ OTHER:
SECTION TWO: CHECK ONLY THE PROGRAM (S) YOU ARE REQUESTING FOR EXPRESS PERMITTING
❑401 Unit ❑ Stream Origin Determination: _#of stream calls- Please a0ach TOPO map marking the areas in questions
❑ ImennittentrPerennial Determination: _ # of stream calls - Please attach TOPO map marking the areas in questions
❑ 401 Water Quality certification ❑ Isolated Wetland(_ lineallor_acres)
❑ Riparian Buffer Authorization ❑ Minor Variance ❑ Major General Variance
® Stare Stormwatet ❑ General ❑ SFR, ❑Bkhd 8 at Rmp, ❑ Clear 8 Grub, ❑ Utility
❑ Low Density ❑ Low Density -Cum 8 Gutter _ # Curb Outlet Swales ❑ Off -site [SW _ (Provide permit #)]
® High Density -Detention Pond 1 YTmatment Systems ® High Density-InNtretion 1017reatment Systems
❑ High Density-Bio-Retention / Imaiment Systems ❑ High Density-Stormwater Wetlands / Treatment Systems❑ High Density -
Other _ t Treatment Systems /® MODIFICATION: ® Major ❑ Minor ❑ Revision SW 805112iPmda• whin a!
❑ Coastal Management ❑ Excavation 8 Fill ❑ Bridges 8 Culverts ❑ Structures Information
❑ Upland Development ❑ Manna Development ❑ Urban Waterfront
❑ Land Quality ❑ Emsion and Sedimentation Control Plan with _ acres to be disturbed.(CK If (for DENR use))
SECTION THREE - PLEASE CHECK ALL THAT IS APPLICABLE TO YOUR PROJECT (for helh souping and express meeting request)
Wetlands on Site ❑ Yes ® No
Wetlands Delineation has been completed: ® Yes ❑ No
US ACOE Approval of Delineation completed: ® Yes ❑ No
Received from US ACOE ® Yes ❑ No
Fee Soli) for mulliok aermils: (CMa)k 4
Buffer Impacts: ® No ❑ YES: _acre(s)
Isolated wetland on Property ❑ Yes ® No
404 Application in Process wl US ACOE ❑ Yes ® No Permit
Fogy DIM n.0 enh
Torelfw Amount If
SUBMITTAL DATES
I Fee
SUBMITTAL DATES
Fee
CAMA
S
Variance El Mai; El Min)
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soul HD, LJ LD, LJ cent
f
401,
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LDS
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NCOENR EXPRESS September 2008
t Field Cade Changed
Field code Changed -)
Field Code Changed

Section 6B at St James Plantation
Express Stormwater Narrative
April 2014
Project Narrative:
Reserve Development Company is proposing the modification of stormwater permit SW8
051128 approved September 2013. The site is located within The Reserve at St James Plantation
off of NC Hwy 211 and will be modified with one of the wet detention ponds being converted
to an infiltration basin.
The project is within a drainage basin that drains to Beaverdam Creek (SC;SW,HQW). The
stormwater will be conveyed through a stormdrainage system and treated in a wet detention
pond and infiltration trench per high density design criteria. In conjunction with this, they will
be designed to meet the Brunswick County Storm Water Ordinance.
This project will not have any wetland impacts and all permit applications for the whole
development have been submitted to the necessary agency for review and approval.

NCDENR - Stormwater Permitting Map Viewer
htip:Hportal.nedenr.org/web/ir/sw-permitting-map
NC Department of Environment and Natural Resources
Energy Mineral and Land Resources - Stormwater Permitting Map Viewer
Enter Address:'
Latitude (decimal degrees, N):
Back to Stormwater Permitting (http://ponal.ncdenr.orEVweb/ir/swmaps)
Stormwater Permitting Map Viewer
Find Address Reset
Longitude (decimal degrees, W):
Need to convert degrees,, minutes, seconds to decimal format? muP:mr.nluon.rca.9otI TeL derinx.hJ
Or, just enter coordinates in the'ADDR15Sfield like this: tdeg min Seel (-deg min sec), and then click Find Address'.
Need help with this map? Contact Bethany Georgoulias at [phone] or bethany.georgoulias®ncdenr.gov
Find Location
Click on the map to see permitting information.
Please check with the local government to verify current boundaries and specific stormwater requirements.
ft.red 6y C,o¢pewr.Jp rlat API vs Pty'rheJepepeeeMrol✓mq✓GxuwntuioNpra.ny✓I end CmylenYbn Table muPu,_.e aa,_:=aevN.mm.N.y
Now New Ur Ized ere. from u. 2010 U.S. Comm an renected In map permrtt" Inform.bn.
sea 2012 narrn.t.r reference ad. mt<P:uPartei emenr.erpweenrnennpea¢yne Mwl,. �t Updated December 2012.
N.C. Department of Environment and Natural Resources
1601 Nail Service Center, Raleigh, NC 27699 1601
Head9uartery (Envinverent and Natural Rerources auildinin): 217 W. Jones St.
�),
Archdale Building: 512 N. Salisbury St.
NCDENR
Toll Free: [phone]
I of 1 2/11/2014 7:53 PM

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RFIS
Soils Engineering and Testing Services
St. James Properties, LLC
Post Office Box 10879
Southport, North Carolina 28461
Attention: Mr. Mark Brambell
January 15, 2014
Reference: Infiltration Testing and Seasonal High Watertable Estimate
Proposed Infiltration Pond Section 6B
St. James Plantation
Southport, North Carolina
RFTS Job No. 943-14
Dear Mr. Brambell:
RFTS is pleased to provide testing services during the design phase of Section 6B located in St.
James Plantation near Southport, North Carolina.
DESCRIPTION OF ACTIVITIES AND FINDINGS
As requested, our staff visited the site on January 8, 2014, to perform infiltration testing and
estimate the seasonal high watertable at one location identified by you. The purpose of this
testing was to provide soil parameters for stormwater infiltration design.
Seasonal High Watertable Estimate
A hand auger boring was advanced at one location to a depth of approximately 10 feet below the
existing ground surface in the area where the stromwater infiltration pond was currently being
excavated. Our boring was advanced on top of the berm that divides the two bays. The
encountered soils were logged and visually classified by depth and a Munsell Soil Color Chart
was used to determine the hue, value, and chroma of the visually distinct soil layers. Our soil log
is presented in Table 1.
Soils encountered in our boring consist of interbedded clean fine sands through the boring
termination depth with no distinct zones of soil cementation in the profile. Based on our
experience with similar soils and comparisons of the soil coloration to the Munsell Chart, it is
our opinion that seasonal high water table level occurs approximately 8.5 feet below the top of
the dividing bens (approximate elevation of 20.5') and appears to be about 3 feet lower than the
BMW elevation. A measurement made 1 hour after angering indicate depths to standing water in
the boreholes of 119 below the existing ground surface.
RFTS, vLLC Committed to Recponsit,c Service Office: 910-458-1377
1305 3A Carolina Beach Ave N Fax. [phone]
Carolina Beach No,1h Carolina 28428 tl'rUW.I'ftSpiiL.LOrIi ••

A
St. James Properties, LLC
RFTS Job No. 943-13
Infiltration Testing
January 15, 2014
Page Two
Infiltration testing was performed using a model 2800 Guelph Permeameter which is a constant -
head device which operates on the Mariotte siphon principle and is referenced in ASTM D-5126.
The permeameter is used to determine field saturated hydraulic conductivity in centimeters per
second for soil at a specified depth. This testing involves advancing a borehole to the desired
infiltration depth and introducing water at a constant head to determine the steady state flow rate
from which the hydraulic conductivity can be calculated. The results of our permeameter testing
are presented in Table 2.
RECOMMENDATIONS
Based on the results of our field testing and soil classifications at the test location, we offer the
following recommendations for stormwater infiltration design:
At.the test location INP-1 it is our opinion that in order to achieve the steady state now rate
obtained during our testing; the areas of infiltration galleries or other infiltration structure should
introduce stormwater at approximately 30 inches below the existing ground surface elevation.
For purposes of sizing the structures we recommend an ultimate application rate of 6.9 inches per
hour. These recommendations should be reviewed by appropriate regulatory authorities before
Finalizing the details of any civil design.
Please find attached our field data and a sketch showing the approximate test locations. If you
have any questions after reviewing this letter, please do not hesitate to contact us at your
convenience.
Sincerely,
RFTS,PLLC
David L. Winstead Steven D. Ily, P.E.
Field Operations Manager Senior Engiter
NC Registration No. 17638
I)L%%':SDK/di%%
Attachments

Table I
Munsell Soil Classifications
Infiltration Stormwater Pond Section 6B
St. James Plantation
Southport, North Carolina
RFTS Job No. 943-14
Loc
Soil Description
Hue
Value
Chroma
Depth
(in.)
Comments
INF-I
Topsoil
-
-
0-5
White fine SAND
I OYR
8
1
5-17
Dark Yellowish Brown fine
SAND
IOYR
4
4
17-30
Brownish Yellow fine SAND
1 OYR
6
6
30-50
Pale Yellow fine SAND
IOYR
7
7
50-71
Light Yellowish Brown fine
SAND
IOYR
6
6
71-80
Very Pale Brown fine SAND
IOYR
7
7
80-86
Brown fine SAND
IOYR
5
5
86-95
SHWT
White fine SAND
IOYR
8
8
95-114
Pale Brown fine SAND
IOYR
6
6
1 14-122
H=Ona 119"

Table 2
Guelph Permeameter Test Results
Infiltration Stormwater Pond Section 6B
St. James Plantation
Southport; North Carolina
RFTS Job No. 943-14
Location
1
Depth (in.)
30
H, (cm)
5
Ri (cm/min)
3.7
Ris (cm/sec)
0.0616
H, (cm)
10
R2 (cm/min)
6.9
Res (cm/sec)
0.115
Kf5 (cm/sec)
4.89x10
Krs (in/hr)
6.9
Definition of Terms
Ri 2 — Established 3 or more constant rate of water level change (cm/min)
R1s.2s — Calculated steady state flow rates (cm/sec)
H1.2 — Maintained Head of H2O (cm)
Krs — Calculated field saturated hydraulic conductivity (cm/sec)
Depth — Depth of well hole (in.)
Location — Test location identification number
Note: Diameter of well is 3.0 cm.