20071194 Ver 2_More Info Received_20080305

LandDesign ur n design planning civil engineer ng landscape architec-urf
TRANSMITTAL Grove Arcade Building
One Page Avenue - Suite 220 - Asheville, NC 28801
V: 828.281.1447 F: 828.281.1449
DATE: 3/4/2008 NUMBER OF PAGES: 1
PROJECT NAME: The Birches at Wildcat Cliffs PROJECT #: 6007075
TO: Cyndi Karoly BUS. PHONE:
Division of Water Quality BUS. FAX:
401 Oversight/Express Review Permitting BUS. MOBILE:
Unit
Raleigh NC 27604
CC
WE ARE SENDING:
VIA:
PURPOSE:
? DRAWINGS ? MAIL ? APPROVAL
? SPECIFICATIONS ? FAX ? YOUR USE
? APPLICATIONS ? COURIER YOUR INFORMATION
? FEES ? FEDEX GROUND ? REVIEW/ COMMENT
? REDLINES LK-1 FEDEX OVERNIGHT ? YOUR REQUEST
? DISK/ CD ? HAND DELIVERY ? SIGNATURE
OTHER ? PICKUP
? EMAIL
QUANTITY: ITEM: DESCRIPTION:
1 Response to DWQ Request for Dated 3/4/08

5 Information
Stormwater Management Plans ' J
Seal Date 2/29/08 - F
5 Soils Report prepared by Mountain Seal Date 2/23/08`
Soils, Inc.
5 BMP Supplement Sheet for each
proposed infiltration trench C .3
5 Operation & Maintenance Agreement
for each proposed infiltration trench 1
5 Request for More Information Dated 2/6/08
NOTES
MAR 5 2008
FROM: Greg Hoffman, El DENR-WATER QIJAUTY ss
u1eTI eune eun sTnRMWATER BRANCH
If this document was delivered via FAX, the accompanying transmission contains confidential information intended only for the use of the individual of the entity named
above. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution or the taking of any action in reliance on the contents of this
facsimile information is strictly prohibited. If you have received this FAX in error, please immediately notify us by telephone to arrange for disposition or return of the
documents to us.
Asheville NC
Washington DC Tampa FL Asheville NC Pinehurst NC Charlotte NC Nashville TN Beijing PRC
LandDesign.v
urban design planning civil engineering branding landscape architecture
March 4, 2008
Ms. Cyndi Karoly, Supervisor
Division of Water Quality
401 Oversight/ Express Review Permitting Unit
1650 Mail Service Center
Raleigh, NC 27604
RE: The Birches at Wildcat Cliffs
Request for More Information dated February 6, 2008
DWQ Project #07-1194, Ver. 2
LDI Project No.: 6007075
Dear Ms. Karoly,
?[I c??oe?Q
MAR 5 2008
DENR - WAVER OUAUTY
%WTIANDS AND STORMWATER BRANCH
Enclosed is a response to the comments listed in the Request for More Information dated
February 6, 2008 in reference to culvert extension and proposed residential development. We
have made all necessary revisions which are addressed in the following enclosed documents:
• Five copies of a Plan set titled "The Birches at Wildcat Cliffs Stormwater
Management Plans" with seal date of 02/29/2008
• Five copies of a Soils report prepared by Mountain Soils, Inc. with seal date of
02/23/2008
• Five Copies of a BMP Supplement Sheet for each proposed infiltration trench
• Five copies of an Operation and Maintenance Agreement for each proposed
infiltration trench
• Five copies of a Request for More Information, dated February 6, 2008 &
addressed to Mr. Bill Nellis
The Response to Comments below details how each of the three (3) comments in the Request
for More Information has been addressed (the original Request for More Information dated
February 6, 2008 has been enclosed for reference).
Response to Comments:
1: The rainwater cistern has been removed from the plan. The enclosed Stormwater
Management Plans (SMP) have been designed to remove a minimum of 85 percent
TSS and 30 percent total nitrogen and total phosphorous from the stormwater
generated by the multi-family portion of this project.
2: The Storm-Pure Filtration catch basin inserts are intended to be used during
construction as an additional measure to reduce erosion. While it is believed that
they will be a valuable tool in preventing erosion, their use was not factored into the
SMP when calculating TSS, nitrogen and phosphorous removal.
3: BMP Supplement Sheets have been provided for each Best Management Practice
(BMP) that will be used on the site in conjunction with the explanation below:
• The plans depict the design at ultimate build-out. BMP's have been
sighted to ensure no structures obstruct access for future maintenance.
• All BMP's were sized to provide volume control (control and treat the
Grove Arcade Bui)ding stormwater runoff resulting from the first (1') of rainfall). BMP's were then
one Page Avenue, suite 220 checked to ensure they are large enough to treat the stormwater, based on
Asheville, NC 28801 the effective infiltrating area. Volume requirements were calculated using
V: 828.281 1447
F: 828.281.1449
www.Land Design.corn
G:\_2007\6007075\Docs\Correspondence\7075-Response to DWQ Request for Information Am
Washington DC
Charlotte NC
Pinehurst NC
Asheville NC
Tampa FL
Nashville TN
Beijing PRC
the methods outlined in the North Carolina Stormwater Best Management
Practices Manual and are included in the SMP.
The proposed development will be a multi-family community. As such, a
homeowner's association will own and be responsible for maintaining all
common areas of the site, including roads, utilities and lawn areas. As a
result, there is no right of way or drainage easement.
It is intended that the infiltration basins not be constructed until the
upstream areas have been stabilized, to protect from sedimentation.
Eleven soil borings were performed on site, by licensed soil scientists, to
a maximum depth of eight feet and analyzed for hydraulic conductivity.
Infiltration trenches are designed to be approximately five feet below
existing grade. Neither groundwater nor bedrock were encountered at
borings and will not be within two feet of the bottom of either trench,
however, high concentrations of subsurface rock were encountered at two
locations. These locations were noted, and the infiltration trenches have
been sited to avoid the high concentrations of subsurface rock.
Should you have any questions or need any additioyal information please call.
Respectfully Submitted,
LANDDESIGN, INC.
Marty Kocot, PE
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Enclosure: A"
cc: Mr. Bill Nellis, Wildcat Cliffs Country Club, Inc.
File 6007075
Washington DC
Charlotte NC
Pinehurst NC
Asheville NC
Tampa FL
Nashville TN
Beijing PRC
G:\_2007\6007075\Docs\Correspondence\7075-Response to DWQ Request for Information doc
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
p -? Coieen H. Sullins, Director
Division of Water Quality
February 6, 2008
DWQ Project # 07-1194, Ver. 2
Macon County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Bill Nellis
Wildcat Cliffs Country Club, Inc.
770 Country Club Drive
Highlands, NC 28741
Subject Property: Wildcat Cliffs Country Club and Calvert Extension (East Extension)
Cullasaja River/Lake Ravenel_[040401, 2-21-(0.5), WSIII, TR]
REQUEST FOR MORE INFORMATION
Dear Mr. Nellis:
On January 4, 2008, the Division of Water Quality (DWQ) received your application dated
January 2, 2008, to fill or otherwise impact 122 linear feet of perennial stream to construct the
proposed residential development. The DWQ has determined that your application was
incomplete and/or provided inaccurate information as discussed below. The DWQ will require
additional information in order to process your application to impact protected wetlands and/or
streams on the subject property. Therefore, unless we receive five copies of the additional
information requested below, we will have to move toward denial of your application as required
by 15A NCAC 2H .0506 and will place this project on hold as incomplete until we receive this
additional information. Please provide the following information so that we may continue to
review your project.
Additional Information Requested:
Per the requirements of GC 3705, the entire multi-family portion of this project must
comply with Stormwater Management Plan (SMP) Requirements for Applicants
Other Than the North Carolina Department of Transportation, available at:
htta ://h2o. enr. state.nc.us/newetlands/documents/S W Rea uirementsforADDlicantsothe
rthanNCDOT2d£ This policy requires an SMP that removes a minimum of 85
percent TSS and 30 percent of the total nitrogen and total phosphorus from the
stormwater generated by.this multi-family portion of this project. The proposed
rainwater cistern does not meet the above pollutant removal criteria and must be
replaced by an appropriate BMP.
2. Figure 3C indicates that a portion of the site will be treated with a Storm-Pure
Filtration catch basin and a level spreader. The DWQ will only allow the use of a
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: httt>://l12o.enr.state.ne.us/ncwetlands
Amt Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
D g@ffl51Wrr-
MAR 5 2008
DENR - WATER QUALITY
SANDS AND STORMWIMR C,H
NorthCarohna
Naw,nallry
Wildcat Cliffs Country Club, Inc.
Page 2 of 2
February 6, 2008
proprietary device if the applicant enters into a Preliminary Evaluation Period (PEP)
with the DWQ Stormwater Unit. During the PEP, the applicant must monitor the
performance of the proprietary device, and if the device fails to provide adequate
pollutant removal, the applicant must replace the device with another BMP. If you
choose to use the Storm-Pure Filtration catch basin, please contact Mr. Ken Pickle of
the DWQ Stormwater Unit at [phone] ext. 284 to enter the device into the
PEP Program. In addition, the level spreader is not appropriate at the proposed
location due to the steep slopes in the filter strip.
3. Please provide a BMP Supplement Sheet for each proposed best management practice
that will be used on the site (including both worksheets, Design Summary and
Required Items Checklist), as well as all of the required items. For the three proposed
infiltration trenches, the Required Items Checklists and a number of the required
items were omitted. The DWQ cannot review BMP designs until all the required
information has been provided. The BMP Supplement Forms are available on the
DWQ web site at: http://h2o.enr.state.nc.us/su/bmp forms.htm.
Please submit this information within 30 calendar days of the date of this letter. If we do not
receive this requested information within 30 calendar days of the date of this letter, your project
will be withdrawn and you will need to reapply with a new application and a new fee.
This letter only addresses the application review and does not authorize any impacts to wetlands,
waters or protected buffers. Please be aware that any impacts requested within your application
are not authorized (at this time) by the DWQ. Please call Ms. Cyndi Karoly or Mr. Ian
McMillan at 919-733-1786 if you have any questions regarding or would like to set up a meeting
to discuss this matter.
Sincerely,
Cyndi Karoly, Supervisor
401 Oversight/Express Review Permitting Unit
CBKIi rn
cc: Kevin Barnett, DWQ Asheville Regional Office
USACE Asheville Regulatory Field Office
File Copy
Central Files
Clement Riddle, CEC, 718 Oakland Street, Hendersonville, NC 28791
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Filename: 071194Ver2WildeatCliffsCountryClubAnd CuivertExt EastEXt(Macon)0n_Hold
Permit
(to be provided by DWQ)
?A OF W ATF9

NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
INFILTRATION TRENCH SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part Ill) must be printed, filled out and submitted along with all of the required information.
t. PROJECT INFORMATION
Project name The Birches at Wildcat Cliffs
Contact person Hudson Owen
Phone number 828 281 1447
Date 13-Feb-08
Drainage area number Infiltration Trench #5 Collecting Drainage Pipe 12
11. DESIGN INFORMATION
Site Characteristics
Drainage area 11,990.00 ft2
Impervious area 5,876.00 ft2
Percent impervious 49.0%
Design rainfall depth 1.0 in
Peak Flow Calculations
Is pre/post control of the 1-yr 24-hr peak flow required?
1-yr, 24-hr runoff depth
1-yr, 24-hr intensity
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
Storage Volume: Non-SR Waters
Minimum volume required
Volume provided
Storage Volume: SR Waters
1-yr, 24-hr rainfall depth
Pre-development 1-yr, 24-hr runoff
Post-development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Soils Report Summary
Soil type
Infiltration rate
SHWT elevation
Trench Design Parameters
Drawdown time
Perforated pipe diameter
Perforated pipe length
Stone type (if used)
Stone void ratio
Stone is free of fines?
Trench Elevations
Bottom elevation
Storage/overflow elevation
Top elevation
N (Y or N)
2.17 in
0.09 in/hr
0.00378 ft3/sec
0.1008 ft3/sec
0.1 ft3/sec
491 ft3
547 ft3
In
ft3
ft3
,A
ft3
OK for non-SR waters
andy Loam & Loam
0.57 in/hr
4,000.00 fmsl
2 days OK MqR
36 in
54 ft ft N Sq^,D qr?h
ST
#57 washed ?M6y
40%
Y (Y or N) OK
4003.17 fmsl OK
4007.50 fmsl
4008.00 fmsl
Form SW401-Infiltration Trench-Rev. 1 G:\_2007\6007075\Docs\Excel\SW401-InfiltrationTrench #5.xis Parts I. & II. Design Summary, Page 1 of 2
Permit No.
(to be provided by DWQ)
Trench Dimensions
Length (long dimension) 27 ft
Width (short dimension) 8 ft
Height (depth) 5 ft OK
Additional Information
Total runoff volume captured by trench 0.01 ac-in OK
Length of vegetative filter for overflow Min 40 ft OK
Number of observation wells 1 OK
Distance to structure Min 15 ft OK
Distance from surface waters Min 100 ft OK
Distance from water supply well(s) Min 200 ft OK
Separation from impervious soil layer Min 2 ft OK
Naturally occuring soil above SHWT Min 2 ft OK
Bottom covered with 4-in of clean sand? y (Y or N) OK
Recorded drainage easement provided? y (Y or N) OK
Capures all runoff at ultimate build-out? y (Y or N) OK
Bypass provided for larger storms? y (Y or N) OK
Trench wrapped with geotextile fabric? y (Y or N) OK
Pretreatment device provided y
Form SW401-Infiltration Trench-Rev.1 G:\_2007\6007075\Docs\Excel\SW401-InfiltrationTrench #5.xls Parts I. & II. Design Summary, Page 2 of 2
Permit No.
(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.
Page/ Plan
Initials Sheet No.
I 1. Plans (1" 50' or larger) of the entire site showing:
°- Design at ultimate build-out,
p ` j l Off-site drainage (if applicable),
f : L Delineated drainage basins (include Rational C coefficient per basin),
Trench dimensions,
Pretreatment system,
High flow bypass system,
Maintenance access,
Recorded 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 infiltration trench showing:
Bypass structure,
Maintenance access,
Basin bottom dimensions,
Basin cross-section with benchmark for sediment cleanout,
Flow distribution detail for inflow,
Vegetated filter, and
Pretreatment device.

- 3. Section view of the infiltration basin (1" = 20' or larger) showing:
Pretreatment and treatment areas, and
Inlet and outlet structures.
4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided.

5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWQ, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information.
6. An assurance that the installed system will meet design specifications upon initial operation once the
project is complete and the entire drainage area is stabilized.
7. A construction sequence that shows how the infitlration basin will be protected from sediment until the
entire drainage area is stabilized.
8. The supporting calculations.

9. A copy of the signed and notarized inspection and maintenance (I&M) agreement.
10. A copy of the deed restriction.
Form SW401-Infiltration Trench-Rev.1 Part III. Required Items Checklist, Page 1 of 1
Permit No.
(to be provided by DWQ)
A? O?QF W ATF9oG
? v
r
NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM °
401 CERTIFICATION APPLICATION FORM
INFILTRATION TRENCH SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information.
(. PROJECT INFORMATION
Project name The Birches at Wildcat Cliffs
Contact person Hudson Owen
Phone number 828 281 1447
Date 29-Feb-08
Drainage area number Infiltration Trench #3 Collecting the Roof of Building #10
Ill. DESIGN INFORMATION
Site Characteristics
Drainage area 7,900.00 fe
Impervious area 5,254.00 fe
Percent impervious 66.5%
Design rainfall depth 1.0 in
Peak Flow Calculations
Is pre/post control of the 1-yr 24-hr peak flow required?
1-yr, 24-hr runoff depth
1-yr, 24-hr intensity
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
Storage Volume: Non-SR Waters
Minimum volume required
Volume provided
Storage Volume: SR Waters
1-yr, 24-hr rainfall depth
Pre-development 1-yr, 24-hr runoff
Post-development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Soils Report Summary
Soil type
Infiltration rate
SHWT elevation
Trench Design Parameters
Drawdown time
Perforated pipe diameter
Perforated pipe length
Stone type (if used)
Stone void ratio
Stone is free of fines?
Trench Elevations
Bottom elevation
Storage/overflow elevation
Top elevation
N in or N) % D
2.17 in ID
0.09 in/hr MAR 5 2QQ$
0.0024 ft3/sec
0.0065 ft3/sec 'pTER
®E!!V? 0?t9??'"
0.0 ft /sec OS WID
427 ft3
436 ft3 OK for non-SR waters
in
ft3
ft3
ft3
ft3
andy Loam & Loam
1.10 in/hr
3.996.00 fmsl
2 days OK
36 in
24 ft
#57 washed
40%
Y (Y or N) OK
3999.17 fmsl OK
4003.50 fmsl
4004.00 fmsl
Form SW401-Infiltration Trench-Rev.1 G:\_2007\6007075\Docs\Excel\SW401-InfiltrationTrench #3.xls Parts I. & Il. Design Summary, Page 1 of 2
Permit
Trench Dimensions
Length (long dimension) 24 ft
Width (short dimension) 4 ft
Height (depth) 5 ft OK
Additional Information
Total runoff volume captured by trench 0.12 ac-in OK
Length of vegetative filter for overflow Min 40 ft OK
Number of observation wells 1 OK
Distance to structure Min 15 ft OK
Distance from surface waters Min 100 ft OK
Distance from water supply well(s) Min 200 ft OK
Separation from impervious soil layer Min 2 ft OK
Naturally occuring soil above SHWT Min 2 ft OK
Bottom covered with 4-in of clean sand? y (Y or N) OK
Recorded drainage easement provided? y (Y or N) OK
Capures all runoff at ultimate build-out? y (Y or N) OK
Bypass provided for larger storms? y (Y or N) OK
Trench wrapped with geotextile fabric? y (Y or N) OK
Pretreatment device provided y
(to be provided by DWQ)
Form SW401-Infiltration Trench-Rev.1 G:\_2007\6007075\Docs\Excel\SW401-InfiltrationTrench #3.xls Parts I. & II. Design Summary, Page 2 of 2
Permit
(to be provided by DWQ)
III. 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.
Page/ Plan
Initials Sheet No.
C-? ° I 1. Plans (1" 50' or larger) of the entire site showing:
Design at ultimate build-out,
Q 1 i Off-site drainage (if applicable),
1- Delineated drainage basins (include Rational C coefficient per basin),
Trench dimensions,
Pretreatment system,
High flow bypass system,
Maintenance access,
Recorded drainage easement and public right of way (ROW),
Overflow device, and
Boundaries of drainage easement.
a 2. Partial plan (1" = 30' or larger) and details for the infiltration trench showing:
Bypass structure,
Maintenance access,
Basin bottom dimensions,
Basin cross-section with benchmark for sediment cleanout,
Flow distribution detail for inflow,
Vegetated filter, and
Pretreatment device.
3. Section view of the infiltration basin (1" = 20' or larger) showing:
Pretreatment and treatment areas, and
Inlet and outlet structures.
4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided.

5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWO, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information.
1 6. An assurance that the installed system will meet design specifications upon initial operation once the
project is complete and the entire drainage area is stabilized.
i 7. A construction sequence that shows how the infitlration basin will be protected from sediment until the
entire drainage area is stabilized.

3
i3 8. The supporting calculations.
9. A copy of the signed and notarized inspection and maintenance (I&M) agreement.
'J
T 10. A copy of the deed restriction.
Form SW401-Infiltration Trench-Rev. 1 Part III. Required Items Checklist, Page 1 of 1
Permit No.
(to be provided by DWQ)
OF W ATF9
A? & O? QG
v
NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM ° T
401 CERTIFICATION APPLICATION FORM
INFILTRATION TRENCH 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 the required information
1. PROJECT INFORMATION
Project name The Birches at Wildcat Cliffs
Contact person Hudson Owen
Phone number 828 281 1447
Date 29-Feb-08
Drainage area number Infiltration Trench #2 Treating Runoff from half the roof area of Building 9 and its driveway
11. DESIGN INFORMATION
Site Characteristics
Drainage area 7,867.00 ft2
Impervious area 2,678.00 ft2
Percent impervious 34.0%
Design rainfall depth 1.0 in
Peak Flow Calculations
Is pre/post control of the 1-yr 24-hr peak flow required?
1-yr, 24-hr runoff depth
1-yr, 24-hr intensity
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
Storage Volume: Non-SR Waters
Minimum volume required
Volume provided
Storage Volume: SR Waters
1-yr, 24-hr rainfall depth
Pre-development 1-yr, 24-hr runoff
Post-development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Soils Report Summary
Soil type
Infiltration rate
SHWT elevation
Trench Design Parameters
Drawdown time
Perforated pipe diameter
Perforated pipe length
Stone type (if used)
Stone void ratio
Stone is free of fines?
Trench Elevations
Bottom elevation
Storage/overflow elevation
Top elevation
N (Y or N)
"°
v
'
2.17 in
?t1 lJ L7
`
'
0.09
0.00243 in/hr
ft3/sec Wk 5 2008
0.0065 ft3/sec L)L ar... until ER QUALM
0.0 ft3/sec WETLANDS AND STORMWAMBRANt'.h
234 ft3
256 ft3 OK for non-SR waters
in
ft3
ft3
ft3
ft3
andy Loam & Loam
1.19 in/hr
3,996.00 fmsl
2 days OK
36 in
12 ft
Washed #57
40%
Y (Y or N) OK
3999.17 fmsl OK
4003.50 fmsl
4004.00 fmsl
Form SW401-Infiltration Trench-Rev. 1 G:\_2007\6007075\Docs\Excel\SW401-InfiltrationTrench #2.xls Parts I. & II. Design Summary, Page 1 of 2
Permit N
Trench Dimensions
Length (long dimension) 12 ft
Width (short dimension) 4 ft
Height (depth) 5 ft OK
Additional Information
Total runoff volume captured by trench 0.06 ac-in OK
Length of vegetative filter for overflow Min 40 ft OK
Number of observation wells 1 OK
Distance to structure Min 15 ft OK
Distance from surface waters Min 100 ft OK
Distance from water supply well(s) Min 200 ft OK
Separation from impervious soil layer Min 2 ft OK
Naturally occuring soil above SHWT Min 2 ft OK
Bottom covered with 4-in of clean sand? y (Y or N) OK
Recorded drainage easement provided? y (Y or N) OK
Capures all runoff at ultimate build-out? y (Y or N) OK
Bypass provided for larger storms? y (Y or N) OK
Trench wrapped with geotextile fabric? y (Y or N) OK
Pretreatment device provided y
(to be provided by DWQ)
Form SW401-Infiltration Trench-Rev. 1 G:\_2007\6007075\Docs\Excel\SW401-InfiltrationTrench #2.xls Parts I. & II. Design Summary, Page 2 of 2
Permit
(to be provided by DWQ)
Ill. REQUIRERITEMS 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.
Page/ Plan
Initials Sheet No.
C I 1. Plans (1" 50' or larger) of the entire site showing:
?- Design at ultimate build-out,
Q 1 = 1 Off-site drainage (if applicable),
a Delineated drainage basins (include Rational C coefficient per basin),
Trench dimensions,
Pretreatment system,
High flow bypass system,
Maintenance access,
Recorded 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 infiltration trench showing:
Bypass structure,
Maintenance access,
Basin bottom dimensions,
Basin cross-section with benchmark for sediment cleanout,
Flow distribution detail for inflow,
Vegetated filter, and
Pretreatment device.
3. Section view of the infiltration basin (1" = 20' or larger) showing:
Pretreatment and treatment areas, and
Inlet and outlet structures.
4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided.
s?
5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWQ, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information.
1-4 D 61 6. An assurance that the installed system will meet design specifications upon initial operation once the
project is complete and the entire drainage area is stabilized.
L? e 7. A construction sequence that shows how the infitlration basin will be protected from sediment until the
entire drainage area is stabilized.
8. The supporting calculations.
9. A copy of the signed and notarized inspection and maintenance (I&M) agreement.
'J 10. A copy of the deed restriction.
Form SW401-Infiltration Trench-Rev.1 Part III. Required Items Checklist, Page 1 of 1
Permit N
(to be provided by DWQ)
?? o?OF W A TF9QG
WDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
INFILTRATION TRENCH SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part Ill) must be printed, filled out and submitted along with all of the required information.
t. PROJECT INFORMATION
Project name The Birches at Wildcat Cliffs
Contact person Hudson Owen
Phone number 828 281 1447
Date 29-Feb-08
Drainage area number Infiltration Trench #4 Collecting Roof of Buildings 11 & 12
Ill. DESIGN INFORMATION
Site Characteristics
Drainage area 10,953.00 ft2
Impervious area 9,406.00 ft2
Percent impervious 85.9%
Design rainfall depth 1.0 in
Peak Flow Calculations
Is pre/post control of the 1-yr 24-hr peak flow required?
1-yr, 24-hr runoff depth
1-yr, 24-hr intensity
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
Storage Volume: Non-SR Waters
Minimum volume required
Volume provided
Storage Volume: SR Waters
1-yr, 24-hr rainfall depth
Pre-development 1-yr, 24-hr runoff
Post-development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Soils Report Summary
Soil type
Infiltration rate
SHWT elevation
Trench Design Parameters
Drawdown time
Perforated pipe diameter
Perforated pipe length
Stone type (if used)
Stone void ratio
Stone is free of fines?
Trench Elevations
Bottom elevation
Storage/overflow elevation
Top elevation
N (Y or N)
2.17 in
0.09 in/hr
0.003375 ft3/sec
0.009 ft3/sec
0.0 ft3/sec
752 ft3
754 ft3
in
ft3
ft3
..3
ft3
andy Loam & Loam
1.28 in/hr
4.000.00 fmsl
Q?621),?od?D
MAR 5 2008
OK for non-SR waters DEttt2-WA0EtQ A ERBF100
WLANOS AND STORM
2 days OK
36 in
36 ft
#57 washed
40%
Y (Y or N) OK
4003.17 fmsl OK
4007.50 fmsl
4008.00 fmsl
Form SW401-Infiltration Trench-Rev.1 G:\_2007\6007075\Docs\Excel\SW401-InfiltrationTrench #4.xls Parts I. & Il. Design Summary, Page 1 of 2
Permit No.
(to be provided by DWQ)
Trench Dimensions
Length (long dimension) 18 ft
Width (short dimension) 8 ft
Height (depth) 5 ft OK
Additional Information
Total runoff volume captured by trench 0.20 ac-in OK
Length of vegetative filter for overflow Min 30 ft OK
Number of observation wells 1 OK
Distance to structure Min 15 ft OK
Distance from surface waters Min 30 ft OK
Distance from water supply well(s) Min 200 ft OK
Separation from impervious soil layer Min 2 ft OK
Naturally occuring soil above SHWT Min 2 ft OK
Bottom covered with 4-in of clean sand? y (Y or N) OK
Recorded drainage easement provided? y (Y or N) OK
Capures all runoff at ultimate build-out? y (Y or N) OK
Bypass provided for larger storms? y (Y or N) OK
Trench wrapped with geotextile fabric? y (Y or N) OK
Pretreatment device provided y
Form SW401-Infiltration Trench-Rev.1 G:\_2007\6007075\Docs\Excel\SW401-InfiltrationTrench #4.xls Parts I. & It. 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.
Page/ Plan
Initials Sheet No.
G , i 1. Plans (1" - 50' or larger) of the entire site showing:
C S ° Design at ultimate build-out,
Q 1 = 1 Off-site drainage (if applicable),
1; a ! Delineated drainage basins (include Rational C coefficient per basin),
Trench dimensions,
1 Pretreatment system,
High flow bypass system,
Maintenance access,
Recorded 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 infiltration trench showing:
Bypass structure,
Maintenance access,
Basin bottom dimensions,
Basin cross-section with benchmark for sediment cleanout,
{ . Flow distribution detail for inflow,
Vegetated filter, and
Pretreatment device.
3. Section view of the infiltration basin (1" = 20' or larger) showing:
Pretreatment and treatment areas, and
Inlet and outlet structures.
4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided.
;•, ,
- 5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWQ, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information.
9 , 6. An assurance that the installed system will meet design specifications upon initial operation once the
project is complete and the entire drainage area is stabilized.
7. A construction sequence that shows how the infitlration basin will be protected from sediment until the
entire drainage area is stabilized.
8. The supporting calculations.
9. A copy of the signed and notarized inspection and maintenance (I&M) agreement.
" A 10. A copy of the deed restriction.
Form SW401-Infiltration Trench-Rev.1 Part III. Required Items Checklist, Page 1 of 1

Permit No.
(to be provided by DWQ)
of W n rF9
AN"A
NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM ° Y
401 CERTIFICATION APPLICATION FORM
INFILTRATION TRENCH SUPPLEMENT
This form must be filled out, printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with all of the required information.
I. PROJECT INFORMATION
Project name The Birches at Wildcat Cliffs
Contact person Hudson Owen
Phone number 828 281 1447
Date 29-Feb-08
Drainage area number Infiltration Trench #1 Collecting Half the roof of Building #9, Pipes 8, 9 & 11
N. DESIGN INFORMATION
Site Characteristics
Drainage area 29,335.00 ft2
Impervious area 11,941.00 ft2
Percent impervious 40.7%
Design rainfall depth 1.0 in
Peak Flow Calculations
Is pre/post control of the 1-yr 24-hr peak flow required?
1-yr, 24-hr runoff depth
1-yr, 24-hr intensity
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
Storage Volume: Non-SR Waters
Minimum volume required
Volume provided
Storage Volume: SR Waters
1-yr, 24-hr rainfall depth
Pre-development 1-yr, 24-hr runoff
Post-development 1-yr, 24-hr runoff
Minimum volume required
Volume provided
Soils Report Summary
Soil type
Infiltration rate
SHWT elevation
Trench Design Parameters
Drawdown time
Perforated pipe diameter
Perforated pipe length
Stone type (if used)
Stone void ratio
Stone is free of fines?
Trench Elevations
Bottom elevation
Storage/overflow elevation
Top elevation
N (Y or N)
2.17 in
0.09 in/hr
0.009 ft3/sec
0.02412 ft3/sec
0.0 ft3/sec
1,018 ft3
1,029 ft3 OK for non-SR waters
in
ft3
ft3
ft3
ft3
andy Loam & Loam
1.82 in/hr
fmsl
2 days
Ott
?i'
48 in
28 ft M A? 204$
#57 washed
40% "NptE
OpES?110 SS
Y (Y or N) OK p
3993.17 fmsl OK
3997.50 fmsl
3998.00 fmsl
Form SW401-Infiltration Trench-Rev. 1 G:\_2007\6007075\Docs\Excel\SW401-InfiltrationTrench #1.xls Parts I. & ll. Design Summary, Page 1 of 2
Permit No
Trench Dimensions
Length (long dimension) 28 ft
Width (short dimension) 5 ft
Height (depth) 6 ft OK
Additional Information
Total runoff volume captured by trench 0.28 ac-in OK
Length of vegetative filter for overflow min 40 ft OK
Number of observation wells 1 OK
Distance to structure Min 15 ft OK
Distance from surface waters Min 100 ft OK
Distance from water supply well(s) Min 200 ft OK
Separation from impervious soil layer Min 2 ft OK
Naturally occuring soil above SHWT Min 2 ft OK
Bottom covered with 4-in of clean sand? y (Y or N) OK
Recorded drainage easement provided? y (Y or N) OK
Capures all runoff at ultimate build-out? y (Y or N) OK
Bypass provided for larger storms? y (Y or N) OK
Trench wrapped with geotextile fabric? y (Y or N) OK
Pretreatment device provided y
(to be provided by DWQ)
Form SW401-Infiltration Trench-Rev.1 G:\_2007\6007075\Docs\Excel\SW401-InfiltrationTrench #1.xls Parts I. & ll. Design Summary, Page 2 of 2

Permit
(to be provided by DWQ)
Jill. 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.
Page/ Plan
Initials Sheet No.
1. Plans (1" 50' or larger) of the entire site showing:
Design at ultimate build-out,
p t 1 Off-site drainage (if applicable),
.%. Delineated drainage basins (include Rational C coefficient per basin),
Trench dimensions,
Pretreatment system,
High flow bypass system,
Maintenance access,
Recorded drainage easement and public right of way (ROW),
Overflow device, and
Boundaries of drainage easement.

* f I
w=
2. Partial plan (1" = 30' or larger) and details for the infiltration trench showing:
J Bypass structure,
Maintenance access,
Basin bottom dimensions,
Basin cross-section with benchmark for sediment cleanout,
., Flow distribution detail for inflow,
Vegetated filter, and
Pretreatment device.
' ) 3. Section view of the infiltration basin (1" = 20' or larger) showing:
Pretreatment and treatment areas, and
Inlet and outlet structures.
4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided.

t 5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The
results of the soils report must be verified in the field by DWQ, by completing & submitting the soils
investigation request form. County soil maps are not an acceptable source of soils information.
6. An assurance that the installed system will meet design specifications upon initial operation once the
project is complete and the entire drainage area is stabilized.
i .y 7. A construction sequence that shows how the infitlration basin will be protected from sediment until the
entire drainage area is stabilized.
8. The supporting calculations
.
=p- 9. A copy of the signed and notarized inspection and maintenance (I&M) a
reement
g
.
^/TJ' 10. A copy of the deed restriction.
Form SW401-Infiltration Trench-Rev. 1 Part III. Required Items Checklist, Page 1 of 1
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Infiltration Trench Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. 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 removal efficiency of the BMP.
Important maintenance procedures:
- The drainage area of the infiltration trench will be carefully managed to reduce
the sediment load to the sand filter.
- The water level in the monitoring wells will be recorded once a month and after
every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County).
The infiltration trench will be inspected once a quarter 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 will be kept in a known set location and will 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 resent. Remove the trash/debris.
The grass filter strip or Areas of bare soil and/or Regrade the soil if necessary to
other pretreatment area erosive gullies have formed. remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment has accumulated to Search for the source of the
a depth of greater than six sediment and remedy the problem if
inches. possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
The flow diversion The structure is clogged. Unclog the conveyance and dispose
structure (if applicable) of an sediment off-site.
The structure is damaged. Make any necessary repairs or
replace if damage is too large for
re air.
Form SW401-Infiltration Trench O&M-Rev.3 Page 1 of 3
BMP element: Potential problem: How I will remediate the problem:
The trench Water is ponding on the Remove the accumulated sediment
surface for more than 24 from the infiltration system and
hours after a storm. dispose in a location that will not
impact a stream or the BMP.
The depth in the trench is Remove the accumulated sediment
reduced to 75% of the original from the infiltration system and
design depth. dispose in a location that will not
impact a stream or the BMP.
Grass or other plants are Remove the plants, preferably by
growing on the surface of the hand. If pesticide is used, wipe it on
trench. the plants rather than spraying.
The observation well(s) The water table is within one Contact the DWQ Stormwater Unit
foot of the bottom of the immediately at 919-733-5083.
system for a period of three
consecutive months.
The outflow pipe is clogged. Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
The outflow pipe is damaged. Repair or replace the pipe.
The emergency overflow Erosion or other signs of The emergency overflow berm will
berm damage have occurred at the be repaired or replaced if beyond
outlet. repair.
The receiving water Erosion or other signs of Contact the NC Division of Water
damage have occurred at the Quality 401 Oversight Unit at 919-
outlet. 733-1786.
Form SW401-Infiltration Trench O&M-Rev.3 Page 2 of 3
Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the 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.
Project name:The Birches at Wildcat Cliffs
BMP drainage area number: Infiltration Trench 4, Drainage Area 18
Print name:Bill Nellis
Title:
Addri
Phony
Signa
Date:
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, A6 t"- wh L V) t(4 M , a Notary Public for the State of
iv cv County of 'M(k (, )) , do hereby certify that
personally appeared before me this
day of '? "k4-IA y 4C)Q% , and acknowledge the due execution of the
forgoing infiltration trench maintenance requirements. Witness my hand and official
seal,
SEAL
My commission expires IU I tp i? tN'? ia-4-
Form SW401-Infiltration Trench O&M-Rev.3
Page 3 of 3

Pen-nit Number:
(to be provided by DWQ)
Drainage Area Number:
Infiltration Trench Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. 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 removal efficiency of the BMP.
Important maintenance procedures:
- The drainage area of the infiltration trench will be carefully managed to reduce
the sediment load to the sand filter.
- The water level in the monitoring wells will be recorded once a month and after
every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County).
The infiltration trench will be inspected once a quarter 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 will be kept in a known set location and will 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 resent. Remove the trash/debris.
The grass filter strip or Areas of bare soil and/or Regrade the soil if necessary to
other pretreatment area erosive gullies have formed. remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment has accumulated to Search for the source of the
a depth of greater than six sediment and remedy the problem if
inches. possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
The flow diversion The structure is clogged. Unclog the conveyance and dispose
structure (if applicable) of an sediment off-site.
The structure is damaged. Make any necessary repairs or
replace if damage is too large for
re air.
Form SW401-Infiltration Trench O&M-Rev.3
Page 1 of 3
BMP element: Potential problem: How I will remediate the problem:
The trench Water is ponding on the Remove the accumulated sediment
surface for more than 24 from the infiltration system and
hours after a storm. dispose in a location that will not
impact a stream or the BMP.
The depth in the trench is Remove the accumulated sediment
reduced to 75% of the original from the infiltration system and
design depth. dispose in a location that will not
impact a stream or the BMP.
Grass or other plants are Remove the plants, preferably by
growing on the surface of the hand. If pesticide is used, wipe it on
trench. the plants rather than spraying.
The observation well(s) The water table is within one Contact the DWQ Stormwater Unit
foot of the bottom of the immediately at 919-733-5083.
system for a period of three
consecutive months.
The outflow pipe is clogged. Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
The outflow pipe is damaged. Repair or replace the pipe.
The emergency overflow Erosion or other signs of The emergency overflow berm will
berm damage have occurred at the be repaired or replaced if beyond
outlet. repair.
The receiving water Erosion or other signs of Contact the NC Division of Water
damage have occurred at the Quality 401 Oversight Unit at 919-
outlet. 733-1786.
Form SW401-Infiltration Trench O&M-Rev.3 Page 2 of 3
Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the 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.
Project name:The Birches at Wildcat Cliffs
BMP drainage area number: Infiltration Trench 3, Drainage Area 17
Print name:Bill Nellis
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, Li 4 t& a Notary Public for the State of
County of J' k 0,.C, y? , do hereby certify that
Vg1 L `Vi OU A (e h; Q U i S personally appeared before me this
day of (-Aaa' Doo ? , and acknowledge the due execution of the
forgoing infiltration trench maintenance requirements. Witness my hand and official
seal,
SEAL
My commission expires IC ` Ili` ? r lk W l~ ? r1
Form SW401-Infiltration Trench O&M-Rev.3 Page 3 of 3
Date: 2,-a-7-i2<2?
Pen-nit Number:
(to be provided by DWQ)
Drainage Area Number:
Infiltration Trench Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. 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 removal efficiency of the BMP.
Important maintenance procedures:
- The drainage area of the infiltration trench will be carefully managed to reduce
the sediment load to the sand filter.
- The water level in the monitoring wells will be recorded once a month and after
every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County).
The infiltration trench will be inspected once a quarter 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 will be kept in a known set location and will 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 resent. Remove the trash/debris.
The grass filter strip or Areas of bare soil and/or Regrade the soil if necessary to
other pretreatment area erosive gullies have formed. remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment has accumulated to Search for the source of the
a depth of greater than six sediment and remedy the problem if
inches. possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
The flow diversion The structure is clogged. Unclog the conveyance and dispose
structure (if applicable) of an sediment off-site.
The structure is damaged. Make any necessary repairs or
replace if damage is too large for
repair.
Form SW401-Infiltration Trench O&M-Rev.3 Page 1 of 3
BMP element: Potential problem: How I will remediate the problem:
The trench Water is ponding on the Remove the accumulated sediment
surface for more than 24 from the infiltration system and
hours after a storm. dispose in a location that will not
impact a stream or the BMP.
The depth in the trench is Remove the accumulated sediment
reduced to 75% of the original from the infiltration system and
design depth. dispose in a location that will not
impact a stream or the BMP.
Grass or other plants are Remove the plants, preferably by
growing on the surface of the hand. If pesticide is used, wipe it on
trench. the plants rather than spraying.
The observation well(s) The water table is within one Contact the DWQ Stormwater Unit
foot of the bottom of the immediately at 919-733-5083.
system for a period of three
consecutive months.
The outflow pipe is clogged. Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
The outflow pipe is damaged. Repair or replace the pipe.
The emergency overflow Erosion or other signs of The emergency overflow berm will
berm damage have occurred at the be repaired or replaced if beyond
outlet. repair.
The receiving water Erosion or other signs of Contact the NC Division of Water
damage have occurred at the Quality 401 Oversight Unit at 919-
outlet. 733-1786.
Form SW401-Infiltration Trench O&M-Rev.3 Page 2 of 3
Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the 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.
Project name:The Birches at Wildcat Cliffs
BMP drainage area number: Infiltration Trench 1. Drainage Areas 8 9 11 & 15
Print name:Bill Nellis
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.
r
n
I, 1%.1' Jq c6Lk ' 1IV (,w kSM , a Notary Public for the State of
N'y k4, Cct,?€,ti +1•c? , f ounty of It y ';-\- , do hereby certify that
k 6 ,- K • K) tk:i. k' S personally appeared before me this - Ott -
day of _?AqUkjkAAA :?)OA , and acknowledge the due execution of the
forgoing infiltration trench maintenance requirements. Witness my hand and official
seal,
SEAL
My commission expires Cj l'1X"(kJX'
K \
Form SW401-Infiltration Trench O&M-Rev.3 Page 3 of 3
Date: Z- ^Z7 -,© a
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Infiltration Trench Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. 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 removal efficiency of the BMP.
Important maintenance procedures:
- The drainage area of the infiltration trench will be carefully managed to reduce
the sediment load to the sand filter.
- The water level in the monitoring wells will be recorded once a month and after
every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County).
The infiltration trench will be inspected once a quarter 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 will be kept in a known set location and will 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 resent. Remove the trash/debris.
The grass filter strip or Areas of bare soil and/or Regrade the soil if necessary to
other pretreatment area erosive gullies have formed. remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment has accumulated to Search for the source of the
a depth of greater than six sediment and remedy the problem if
inches. possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
The flow diversion The structure is clogged. Unclog the conveyance and dispose
structure (if applicable) of an sediment off-site.
The structure is damaged. Make any necessary repairs or
replace if damage is too large for
re air.
Form SW401-Infiltration Trench O&M-Rev.3 Page 1 of 3
BMP element: Potential problem: How I will remediate the problem:
The trench Water is ponding on the Remove the accumulated sediment
surface for more than 24 from the infiltration system and
hours after a storm. dispose in a location that will not
impact a stream or the BMP.
The depth in the trench is Remove the accumulated sediment
reduced to 75% of the original from the infiltration system and
design depth. dispose in a location that will not
impact a stream or the BMP.
Grass or other plants are Remove the plants, preferably by
growing on the surface of the hand. If pesticide is used, wipe it on
trench. the lants rather than spraying.
The observation well(s) The water table is within one Contact the DWQ Stormwater Unit
foot of the bottom of the immediately at 919-733-5083.
system for a period of three
consecutive months.
The outflow pipe is clogged. Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
The outflow pipe is damaged. Re air or re lace the pipe.
The emergency overflow Erosion or other signs of The emergency overflow berm will
berm damage have occurred at the be repaired or replaced if beyond
outlet. repair.
The receiving water Erosion or other signs of Contact the NC Division of Water
damage have occurred at the Quality 401 Oversight Unit at 919-
outlet. 733-1786.
Form SW401-Infiltration Trench O&M-Rev.3 Page 2 of 3
Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the 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.
Project name:The Birches at Wildcat Cliffs
BMP drainage area number: Infiltration Trench 2, Drainage Area 16
Print name:Bill Nellis
Title:
Addr
Phon
Signz
Date:
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.
J.6"kk? a Notary Public for the State of
N ? Gi.,tZ?t(kk , County of A1i "`Y- , do hereby certify that
ti 0_'.A I . ?j t ?t ( S personally appeared before me this -J_1-I?
day of ?P-Z" k and acknowledge the due execution of the
4
forgoing infiltration trench maintenance requirements. Witness my hand and official
seal,
SEAL
M commission expires _ i it, ? 1 ? "`
Form SW401-Infiltration Trench O&M-Rev.3 Page 3 of 3
Pennit Number:
(to be provided by DWQ)
Drainage Area Number:
Infiltration Trench Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. 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 removal efficiency of the BMP.
Important maintenance procedures:
- The drainage area of the infiltration trench will be carefully managed to reduce
the sediment load to the sand filter.
- The water level in the monitoring wells will be recorded once a month and after
every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County).
The infiltration trench will be inspected once a quarter 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 will be kept in a known set location and will 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 resent. Remove the trash/debris.
The grass filter strip or Areas of bare soil and/or Regrade the soil if necessary to
other pretreatment area erosive gullies have formed. remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment has accumulated to Search for the source of the
a depth of greater than six sediment and remedy the problem if
inches. possible. Remove the sediment and
dispose of it in a location where it
will not cause impacts to streams or
the BMP.
The flow diversion The structure is clogged. Unclog the conveyance and dispose
structure (if applicable) of an sediment off-site.
The structure is damaged. Make any necessary repairs or
replace if damage is too large for
repair.
Form SW401-Infiltration Trench O&M-Rev.3 Page 1 of 3
BMP element: Potential problem: How I will remediate the problem:
The trench Water is ponding on the Remove the accumulated sediment
surface for more than 24 from the infiltration system and
hours after a storm. dispose in a location that will not
impact a stream or the BMP.
The depth in the trench is Remove the accumulated sediment
reduced to 75% of the original from the infiltration system and
design depth. dispose in a location that will not
impact a stream or the BMP.
Grass or other plants are Remove the plants, preferably by
growing on the surface of the hand. If pesticide is used, wipe it on
trench. the plants rather than s ra in g.
The observation well(s) The water table is within one Contact the DWQ Stormwater Unit
foot of the bottom of the immediately at 919-733-5083.
system for a period of three
consecutive months.
The outflow pipe is clogged. Provide additional erosion
protection such as reinforced turf
matting or riprap if needed to
prevent future erosion problems.
The outflow pipe is damaged. Repair or replace the pipe.
The emergency overflow Erosion or other signs of The emergency overflow berm will
berm damage have occurred at the be repaired or replaced if beyond
outlet. repair.
The receiving water Erosion or other signs of Contact the NC Division of Water
damage have occurred at the Quality 401 Oversight Unit at 919-
outlet. 733-1786.
Form SW401-Infiltration Trench O&M-Rev.3 Page 2 of 3
Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the 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.
Project name:The Birches at Wildcat Cliffs
BMP drainage area number: Infiltration Trench 5, Drainage Area 12
Print
Title
Addi
Phon
Signs
Date: Z-2 7 9 iENote: 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.
a Notary Public for the State of
County of Atk tL L,y , do hereby certify that
lL???i a.cy? It : iJ personally appeared before me this l']'6-
day of )t Gt-w;u and acknowledge the due execution of the
forgoing infiltration trench maintenance requirements. Witness my hand and official
seal,
SEAL
My commission expires i C? t C 1:?- [1c1. U0?ta?G1
Form SW401-Infiltration Trench O&M-Rev.3 Page 3 of 3