SW1200601_2020-07-22 Forms and Suplemental Info_20200722

ENGINEERING ASSOCIATES
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Letter of Transmittal
From: Date:
cc: (need telephu11e no. if Fedex, no P.O. Boaj
Project Name
Project No:
D Ma.ii Deliver
Document Description:
CommentS:
D Overni ght* D Other _______ _
Date: Copies:
D
DEMLR USE ONLY
Date Received Fee Paid Permit Number

Applicable Rules:  Coastal SW – 1995  Coastal SW – 2008  Ph II - Post Construction
(select all that apply)  Non-Coastal SW- HQW/ORW Waters  Universal Stormwater Management Plan
 Other WQ Mgmt Plan:

Form SWU-101 Version Oct. 31, 2013 Page 1 of 6
State of North Carolina
Department of Environment and Natural Resources
Division of Energy, Mineral and Land Resources

STORMWATER MANAGEMENT PERMIT APPLICATION FORM
This form may be photocopied for use as an original
I. GENERAL INFORMATION
1. Project Name (subdivision, facility, or establishment name - should be consistent with project name on plans,
specifications, letters, operation and maintenance agreements, etc.):
SANSTONE OFFICE & STORAGE EXPANSION
2. Location of Project (street address):
0 OLD HAYWOOD ROAD
City:MILLS RIVER County:HENDERSON Zip:28759
3. Directions to project (from nearest major intersection):
FROM NC-280 (BOYLSTON HIGHWAY), TURN NORTH ONTO OLD HAYWOOD ROAD (NC-191).
CONTINUE FOR 1.5 MILES, THE PROJECT WILL BE ON THE LEFT ADJACENT TO THE LODGE AT
MILLS RIVER
4. Latitude:35 25’ 28” N Longitude:82 34’ 30” W of the main entrance to the project.

II. PERMIT INFORMATION:
1. a. Specify whether project is (check one): New Modification Renewal w/ Modification†
†Renewals with modifications also requires SWU-102 – Renewal Application Form
b. If this application is being submitted as the result of a modification to an existing permit, list the existing
permit numberN/A , its issue date (if known) , and the status of
construction: Not Started Partially Completed* Completed* *provide a designer’s certification
2. Specify the type of project (check one):
Low Density High Density Drains to an Offsite Stormwater System Other
3. If this application is being submitted as the result of a previously returned application or a letter from
DEMLR requesting a state stormwater management permit application, list the stormwater project number,
if assigned, and the previous name of the project, if different than currently
proposed, .
4. a. Additional Project Requirements (check applicable blanks; information on required state permits can be
obtained by contacting the Customer Service Center at 1-877-623-6748):
CAMA Major Sedimentation/Erosion Control: 5.0 ac of Disturbed Area
NPDES Industrial Stormwater 404/401 Permit: Proposed Impacts
b. If any of these permits have already been acquired please provide the Project Name, Project/Permit Number,
issue date and the type of each permit:

5. Is the project located within 5 miles of a public airport? No Yes
If yes, see S.L. 2012-200, Part VI: http://portal.ncdenr.org/web/lr/rules-and-regulations
Form SWU-101 Version Oct. 31, 2013 Page 2 of 6
III. CONTACT INFORMATION
1. a. Print Applicant / Signing Official’s name and title (specifically the developer, property owner, lessee,
designated government official, individual, etc. who owns the project):
Applicant/Organization:SANSTONE HOME OFFICE PROPERTIES, LLC
Signing Official & Title:CHRISTOPHER J. SPRENGER, MANGER
b. Contact information for person listed in item 1a above:
Street Address:229 AIRPORT ROAD, SUITE 7-104
City:ARDEN State:NC Zip:28704
Mailing Address (if applicable):SAME AS ABOVE
City: State: Zip:
Phone: ( ) Fax: ( )
Email:
c. Please check the appropriate box. The applicant listed above is:
The property owner (Skip to Contact Information, item 3a)
Lessee* (Attach a copy of the lease agreement and complete Contact Information, item 2a and 2b below)
Purchaser* (Attach a copy of the pending sales agreement and complete Contact Information, item 2a and
2b below)
Developer* (Complete Contact Information, item 2a and 2b below.)

2. a. Print Property Owner’s name and title below, if you are the lessee, purchaser or developer. (This is the
person who owns the property that the project is located on):
Property Owner/Organization:
Signing Official & Title:
b. Contact information for person listed in item 2a above:
Street Address:
City: State: Zip:
Mailing Address (if applicable):
City: State: Zip:
Phone: ( ) Fax: ( )
Email:

3. a. (Optional) Print the name and title of another contact such as the project’s construction supervisor or other
person who can answer questions about the project:
Other Contact Person/Organization:GREENFINN GROUP
Signing Official & Title:CHRIS FINN - PRESIDENT
b. Contact information for person listed in item 3a above:
Mailing Address:825C MERRIMON AVE, SUITE 171
City:ASHEVILLE State:NC Zip:28804
Phone: (828 ) 390-4819 Fax: ( )
Email:[e-mail]
4. Local jurisdiction for building permits: TOWN OF MILLS RIVER
Point of Contact:DANIEL COBB Phone #: (828 ) 890-2901

Form SWU-101 Version Oct. 31, 2013 Page 3 of 6
IV. PROJECT INFORMATION
1. In the space provided below, briefly summarize how the stormwater runoff will be treated.
STORMWATER WILL BE CAPTURED IN A PIPED STORMWATER CONVEYANCE AND DISCHARGED
TO A BIORETENTION CELL THAT IS DESIGNED FOR WATER QUALITY AND QUANITY.

2. a. If claiming vested rights, identify the supporting documents provided and the date they were approved:
Approval of a Site Specific Development Plan or PUD Approval Date:
Valid Building Permit Issued Date:
Other: Date:
b. If claiming vested rights, identify the regulation(s) the project has been designed in accordance with:
Coastal SW – 1995 Ph II – Post Construction
3. Stormwater runoff from this project drains to the French Broad River basin.
4. Total Property Area: 6.00 acres 5. Total Coastal Wetlands Area: 0 acres
6. Total Surface Water Area: 0 acres
7. Total Property Area (4) – Total Coastal Wetlands Area (5) – Total Surface Water Area (6) = Total Project
Area+: 6.00 acres
+ Total project area shall be calculated to exclude the following: the normal pool of impounded structures, the area
between the banks of streams and rivers, the area below the Normal High Water (NHW) line or Mean High Water
(MHW) line, and coastal wetlands landward from the NHW (or MHW) line. The resultant project area is used to
calculate overall percent built upon area (BUA). Non-coastal wetlands landward of the NHW (or MHW) line may
be included in the total project area.
8. Project percent of impervious area: (Total Impervious Area / Total Project Area) X 100 = 24.7 %
9. How many drainage areas does the project have?1 (For high density, count 1 for each proposed engineered
stormwater BMP. For low density and other projects, use 1 for the whole property area)
10. Complete the following information for each drainage area identified in Project Information item 9. If there
are more than four drainage areas in the project, attach an additional sheet with the information for each area
provided in the same format as below.
Basin Information Drainage Area 1 Drainage Area Drainage Area Drainage Area
Receiving Stream Name McDOWELL CK
Stream Class * C
Stream Index Number * 6-58
Total Drainage Area (sf) 192,269
On-site Drainage Area (sf) 175,338
Off-site Drainage Area (sf) 16,931
Proposed Impervious Area** (sf) 65,063
% Impervious Area** (total) 33.84%

Impervious** Surface Area Drainage Area 1 Drainage Area Drainage Area Drainage Area
On-site Buildings/Lots (sf) 12,953
On-site Streets (sf) -
On-site Parking (sf) 38,203
On-site Sidewalks (sf) 3,974
Other on-site (sf) -
Future (sf) 9,100
Off-site (sf) 833
Existing BUA*** (sf) -
Total (sf): 65,063
* Stream Class and Index Number can be determined at: http://portal.ncdenr.org/web/wq/ps/csu/classifications
** Impervious area is defined as the built upon area including, but not limited to, buildings, roads, parking areas,
sidewalks, gravel areas, etc.
Form SWU-101 Version Oct. 31, 2013 Page 4 of 6
*** Report only that amount of existing BUA that will remain after development. Do not report any existing BUA that
is to be removed and which will be replaced by new BUA.
11. How was the off-site impervious area listed above determined? Provide documentation. Offsite impervious
determined based on the dimensions of proposed driveway connection. The remainder of the offsite area to
the SCM is built out to the maximum.
Projects in Union County: Contact DEMLR Central Office staff to check if the project is located within a Threatened &
Endangered Species watershed that may be subject to more stringent stormwater requirements as per 15A NCAC 02B .0600.

V. SUPPLEMENT AND O&M FORMS
The applicable state stormwater management permit supplement and operation and maintenance (O&M) forms
must be submitted for each BMP specified for this project. The latest versions of the forms can be downloaded
from http://portal.ncdenr.org/web/wq/ws/su/bmp-manual.

VI. SUBMITTAL REQUIREMENTS
Only complete application packages will be accepted and reviewed by the Division of Energy, Mineral and
Land Resources (DEMLR). A complete package includes all of the items listed below. A detailed application
instruction sheet and BMP checklists are available from
http://portal.ncdenr.org/web/wq/ws/su/statesw/forms_docs. The complete application package should be
submitted to the appropriate DEMLR Office. (The appropriate office may be found by locating project on the
interactive online map at http://portal.ncdenr.org/web/wq/ws/su/maps.)

Please indicate that the following required information have been provided by initialing in the space provided
for each item. All original documents MUST be signed and initialed in blue ink. Download the latest versions
for each submitted application package from http://portal.ncdenr.org/web/wq/ws/su/statesw/forms_docs.
Initials
1. Original and one copy of the Stormwater Management Permit Application Form.
2. Original and one copy of the signed and notarized Deed Restrictions & Protective Covenants
Form. (if required as per Part VII below)
3. Original of the applicable Supplement Form(s) (sealed, signed and dated) and O&M
agreement(s) for each BMP.
4. Permit application processing fee of $505 payable to NCDENR. (For an Express review, refer to
http://www.envhelp.org/pages/onestopexpress.html for information on the Express program
and the associated fees. Contact the appropriate regional office Express Permit Coordinator for
additional information and to schedule the required application meeting.)
5. A detailed narrative (one to two pages) describing the stormwater treatment/management for
6. A USGS map identifying the site location. If the receiving stream is reported as class SA or the
receiving stream drains to class SA waters within ½ mile of the site boundary, include the ½
mile radius on the map.
7. Sealed, signed and dated calculations (one copy).
8. Two sets of plans folded to 8.5” x 14” (sealed, signed, & dated), including:
a. Development/Project name.
b. Engineer and firm.
c. Location map with named streets and NCSR numbers.
d. Legend.
e. North arrow.
f. Scale.
g. Revision number and dates.
h. Identify all surface waters on the plans by delineating the normal pool elevation of
impounded structures, the banks of streams and rivers, the MHW or NHW line of tidal
waters, and any coastal wetlands landward of the MHW or NHW lines.
 Delineate the vegetated buffer landward from the normal pool elevation of impounded
structures, the banks of streams or rivers, and the MHW (or NHW) of tidal waters.
i. Dimensioned property/project boundary with bearings & distances.
j. Site Layout with all BUA identified and dimensioned.
k. Existing contours, proposed contours, spot elevations, finished floor elevations.
l. Details of roads, drainage features, collection systems, and stormwater control measures.
m. Wetlands delineated, or a note on the plans that none exist. (Must be delineated by a
qualified person. Provide documentation of qualifications and identify the person who
made the determination on the plans.
Form SWU-101 Version Oct. 31, 2013 Page 5 of 6
n. Existing drainage (including off-site), drainage easements, pipe sizes, runoff calculations.
o. Drainage areas delineated (included in the main set of plans, not as a separate document).
p. Vegetated buffers (where required).
9. Copy of any applicable soils report with the associated SHWT elevations (Please identify
elevations in addition to depths) as well as a map of the boring locations with the existing
elevations and boring logs. Include an 8.5”x11” copy of the NRCS County Soils map with the
project area clearly delineated. For projects with infiltration BMPs, the report should also
include the soil type, expected infiltration rate, and the method of determining the infiltration rate.
(Infiltration Devices submitted to WiRO: Schedule a site visit for DEMLR to verify the SHWT prior
to submittal, [phone].)
10. A copy of the most current property deed. Deed book: 28 Page No: 571 & DB 3487 PG 445
11. For corporations and limited liability corporations (LLC): Provide documentation from the NC
Secretary of State or other official documentation, which supports the titles and positions held
by the persons listed in Contact Information, item 1a, 2a, and/or 3a per 15A NCAC 2H.1003(e).
The corporation or LLC must be listed as an active corporation in good standing with the NC
Secretary of State, otherwise the application will be returned.
http://www.secretary.state.nc.us/Corporations/CSearch.aspx

VII. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
For all subdivisions, outparcels, and future development, the appropriate property restrictions and protective
covenants are required to be recorded prior to the sale of any lot. If lot sizes vary significantly or the proposed
BUA allocations vary, a table listing each lot number, lot size, and the allowable built-upon area must be
provided as an attachment to the completed and notarized deed restriction form. The appropriate deed
restrictions and protective covenants forms can be downloaded from http://portal.ncdenr.org/web/lr/state-
stormwater-forms_docs. Download the latest versions for each submittal.
In the instances where the applicant is different than the property owner, it is the responsibility of the property
owner to sign the deed restrictions and protective covenants form while the applicant is responsible for ensuring
that the deed restrictions are recorded.
By the notarized signature(s) below, the permit holder(s) certify that the recorded property restrictions and
protective covenants for this project, if required, shall include all the items required in the permit and listed
on the forms available on the website, that the covenants will be binding on all parties and persons claiming
under them, that they will run with the land, that the required covenants cannot be changed or deleted
without concurrence from the NC DEMLR, and that they will be recorded prior to the sale of any lot.

VIII. CONSULTANT INFORMATION AND AUTHORIZATION
Applicant: Complete this section if you wish to designate authority to another individual and/or firm (such as a
consulting engineer and/or firm) so that they may provide information on your behalf for this project (such as
addressing requests for additional information).
Consulting Engineer:BRANDON THOMAS
Consulting Firm: BROOKS ENGINEERING ASSOCIATES, P.A.
Mailing Address:17 ARLINGTON STREET
City:ASHEVILLE State:NC Zip:28801
Phone: (828 ) 232-4700 Fax: ( )
Email:[e-mail]

IX. PROPERTY OWNER AUTHORIZATION (if Contact Information, item 2 has been filled out, complete this
section)
I, (print or type name of person listed in Contact Information, item 2a) , certify that I
own the property identified in this permit application, and thus give permission to (print or type name of person
listed in Contact Information, item 1a) with (print or type name of organization listed in
Contact Information, item 1a) to develop the project as currently proposed. A copy of
the lease agreement or pending property sales contract has been provided with the submittal, which indicates the
party responsible for the operation and maintenance of the stormwater system.

DRAINAGE AREAS
1 Is this a high density project?Yes
2 If so, number of drainage areas/SCMs 1
3
Is all/part of this project subject to previous rule
versions?No
FORMS LOADED
Entire Site 1
4 Type of SCM N/A BIORETENTION
5 Total BUA in project (sq ft)65970 sf 65063 sf
6
New BUA on subdivided lots (subject to
permitting) (sq ft)--
7
New BUA outside of subdivided lots (subject to
permitting) (sf)65137 sf 64230 sf
8 Offsite - total area (sq ft)-16931 sf
9 Offsite BUA (sq ft)833 sf 833 sf
10 Breakdown of new BUA outside subdivided lots:
- Parking (sq ft)38634 sf 38203 sf
- Sidewalk (sq ft)3974 sf 3974 sf
- Roof (sq ft)12953 sf 12953 sf
- Roadway (sq ft)--
- Future (sq ft)9100 sf 9100 sf

- Other, please specify in the comment box
below (sq ft) --
11
New infiltrating permeable pavement on
subdivided lots (sq ft)--
12
New infiltrating permeable pavement outside of
subdivided lots (sq ft)--
13
Exisitng BUA that will remain (not subject to
permitting) (sq ft)--
14 Existing BUA that is already permitted (sq ft)--
15 Existing BUA that will be removed (sq ft)--
16 Percent BUA 25%34%
17 Design storm (inches)-1 in
18 Design volume of SCM (cu ft)-5858 cf
19 Calculation method for design volume -SIMPLE
20
DRAINAGE AREA INFORMATION
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
drainage area(s):
BIORETENTION CELL
1 Drainage area number 1
2 Design volume of SCM (cu ft)5858 cf
3 Is the SCM sized to treat the SW from all surfaces at build-out?Yes
4 Is the SCM located away from contaminated soils?Yes
5 What are the side slopes of the SCM (H:V)?3:1
6
Does the SCM have retaining walls, gabion walls or other engineered side
slopes? No
7
Are the inlets, outlets, and receiving stream protected from erosion (10-
year storm)?Yes
8
Is there an overflow or bypass for inflow volume in excess of the design
volume?Yes
9 What is the method for dewatering the SCM for maintenance?Pump (preferred)
10 If applicable, will the SCM be cleaned out after construction?Yes
11 Does the maintenance access comply with General MDC (8)?Yes
12 Does the drainage easement comply with General MDC (9)?Yes
13
If the SCM is on a single family lot, does (will?) the plat comply with
General MDC (10)?
14 Is there an O&M Agreement that complies with General MDC (11)?Yes
15 Is there an O&M Plan that complies with General MDC (12)?Yes
16 Does the SCM follow the device specific MDC?Yes
17 Was the SCM designed by an NC licensed professional?Yes
18 SHWT elevation (fmsl)< 2175.75
19 Bottom of the bioretention cell (fmsl)2177.75
20 Ponding depth of the design storm (inches)12 in
21 Surface area of the bioretention cell (square feet)5873 sf
22 Design volume of the bioretention cell (cubic feet)5681 cf
23 Is the bioretention cell used for peak attenuation?Yes
24 Depth of peak attenuation over planting surface (in)14 in
25 Height of peak attenuation outlet above the planting surface (in)12 in
26 Infiltration rate of the in situ soil (inch/hour)N/A
27 Diameter of the underdrain pipes (if applicable)6 in
28 Does the design include Internal Water Storage (IWS)?Yes
29 if so, elevation of the top of the IWS (fmsl)2179.5
30 Elevation of the planting surface (fmsl)2181
31 What type of vegetation will be planted? (grass, trees/shrubs, other)?Grass
32 Media depth (inches)30 in
33 Percentage of medium to coarse washed sand by volume 75-85%
34 Percentage of fines (silt and clay) by volume 8-10%
35 Percentage of organic matter by volume 5-10%
36 Type of organic material Pine Bark
37 Phosphorus Index (P-Index) of media (unitless) < 50
38 Will compaction be avoided during construction?Yes
39 Will cell be maintained to a one inch/hour standard?Yes
40 Depth of mulch, if applicable (inches)N/A
41 Type of mulch, if applicable N/A
42 How many clean out pipes are being installed?3
43 Type of pretreatment that will be used:None
44
Please use this space to provide any additional information about the
bioretention cell(s):
BIORETENTION CELL MDC FROM 02H .1052
GENERAL MDC FROM 02H .1050
ADDITIONAL INFORMATION
Line 26 - IWS provided assumed infiltration rate, less than 2 in /hr
Line 43 - Riprap apron utilized to to dissipate energy at inflow to bioretention and at
principal spillway outlet.
Bioretention 3 1:13 PM 7/22/2020