20070081 Ver 2_Stormwater Info_20070720

_ `'
Permit No. ~XP C) ~ ~ U0~ ~ Y p~,,
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
This forrzz may be photocopied for use as an original.
DWO Stormwater Management Plan Review
A complete Stormwater management plan submittal includes a Stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name : e~Gtid'
Contact Person: ~r,r~l ~!
Phone Number: (~~11ci )
For projects with multiple basins, specify which basin this worksheet applies to:
(must match the DA # on the application & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsl).
Soils Report Summary
In-Situ Soil Type
In-Situ Soil Infiltration Rate
SHWT Elevation
Planting Soil Texture
Planting Soil Infiltration Rate
i~,
? ~ ~ ~ in./hr. (the most restrictive soil layer)
~ ~ '~" ft, (Seasonal High Water Table elevation)
-SG-1 G~ (must be a sandy loam, loamy sand, or barn texture
2 . b in./hr.
Basin Design Parameters
Drainage Area 5~ ~ UC) ~ sq.ft. {on-site and off-site drainage to the basin)
Impervious Area 17, ~ (7 sq.ft. (on-site and off-si.te drainage to the basin)
Design Storm 1 inch (1.5 inch event for SA waters, 1 inch event for others)
Design Volume -, ~~_ c.f. (storage volume re9aaired)
Inlet Velocity ~_Z2 fps
Drawdown Time _~~`~ hours
Basin Elevations
Temporary Pool Elevation ~-~ ~ 0 fmsl (elevation of the bypass/ou.tlet stratcture)
Planting Elevation 3~ fmsl (elevation of the grot.cnd surface bottom)
Bottom Elevation 3~q~C7 fmsl (elevation of the bottom of the planting media)
Basin Dimensions `
Basin Size ~ ft. x ~ 2- ft. _ ~ O~° sq. ft. (su.rface area nt basin bottom)
Basin Volume Provided ~~ c.f.
i C.k cl ~..
SWU-108 4.07
Page 1 of 4

Basin Plantings
Number of plantings required ~+ ~ stems (400 stuns per acre of bioretention area is required of a ~~iirlimu~n)
Total No. of plantings provided ~ = Trees ~ + Shrubs
~_ (at least 1 tree for every 3 shrubs)
This system (check one) does does not incorporate the use of an under-drain.
(Under-drains are not allowed for those projects that drain to class SA waters.)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000. These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met, attach written justification. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
"-~ a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
b. No vertical sand bed is proposed.
~ ~ c. The bioretention area is at least 15 feet wide by 40 feet long.
~Ncj Ri/t~t}trttO PtR NC.O~n1~2BmP Yl'IAN~~~1.. ~prfr~~l~(tr JUk.y 2; 2~7
d. A grass buffer strip and sheet flow conditions are provided at the inlet.
H -~'~( e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
~~' f. Ponding depth of 6-12" is provided.
'~ g. In-situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
~ ~ h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
~`~ i. The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
N ~~ j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphorus content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) Include a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
x~~ _ k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
N~~ 1. A detailed planting plan, prepared by a qualified individual, is provided on the plans. This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, constriction schedule, etc..
SWU-108 4.07
Page 2 of 4

m. Type of mulch layer and depth is specified on the plans.
~_ n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
~~~ o. Plan details for the inlet and outlet structures are provided. (including dimensions and
elevations)
~~ p. Al] side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
N~`I q. A benchmark is provided to determine the sediment accumulation in the basin area.
~_ r. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
~_ s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
H ~~ t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc. shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every significant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re-seed, re-plant, and re-mulch as necessary to maintain good vegetative and
mulch cover.
3. Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over-excavating. Over-excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shrubs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shn~bs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed
SWU-108 4.07
Page 3 of 4

RECARGA 1.X
Date: 18-~u1-2007 12:33:35
Output File: Bioretenetion Area 1.txt
Number of time steps= 289
CPU elapsed time (s)= 0
INPUT TERMS
%Impervious= 34
Pervious CN= 74
Facility Area (sf)= 787
Trib. Area (AC)= 1.17
RATloimp2rg= 22.018
RATioperv2rg= 42.7408
Bi o1
LAYER DEPTH (in) Ksat (in/hr) TEXTURE
Depression 12 --- ---
Root zone 36 4.14 1
storage 4 10.00 1
Native --- 0.50 3
Init. Cond.: suc tion head (in)= -39
Max. underdrain flow (in/hr)= 0.010
underdrain diam (in)= 4.003
WATER BALANCE TE RMS
volume(ac-ft) Depth (in) %of Inflow
Inflow 0.03 0.32 100.00
Runoff 0.00 0.00 0.00
Recharge 0.02 0.18 57.48
Evaporation 0.00 0.00 1.14
underdrain 0.02 0.18 56.18
Storage -0.00 -0.05 -14.80
Infiltrated 0.03
Precip. 1.00
Imp. Inflow 0.04 0.86 124.61
Perv.Inflow 0.00 0.02 6.51
Basin Stayon(in) -27.55
Total stayon(in) 0.82
Mass Balance Checks:
vinsoil=input-roff-dvh '
vinsoil (ac-ft)= 3.137271e-002
vinf difference (%)_ -0.0
vrechargl=inf-et-dsws
vrechar~l (ac-ft)= 1.803201e-002
vrech difference (%)= 0.0
dvsoil=inf-rech-et
dvsoil= 1.298450e-002
dvsfce (ac-ft)= O.000OOOe+000
dvs2=input-roff-inf
dvs2 (ac-ft)= 5.760464e-018
PLANT SURVIVABILITY TERMS
total time ponded (h)= 2.8
max time ponded (h)= 2.8
total time Rz saturated (h)= 3.8
total time Rz at wilting point (h)= 0.0
total time Tz saturated (h)= 11.3
max time Rz saturated (h)= 3.8
max time Rz at wilting point (h)= 0.0
max time Tz saturated (h)= 11.3
near saturated times for simulation= 1
15.8 3.8
wilting point times for simulation= 0
0.0 0.0
polded0 times2f8r simulation= 1
overflow times for simulation= 0
0.0 0.0
Page 1

Permit No. a~XP U ~' UC?~ ~ y
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original.
DWO Stormwater Management Plan Review
A complete stormwater management plan submittal includes a Stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing al] stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name : C e cf c~~ t~..~ c
Contact Person: l-~~,+'©~Cl '~~tl~
Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to: A~-
(must match the DA # on the application & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsl).
Soils Report Summary
In-Situ Soil Type
In-Situ Soil Infiltration Rate
SHWT Elevation
Planting Soil Texture
Planting Soil Infiltration Rate
i~
? ~ ~ ~ in./lu'. (the most restrictive soil layer)
~ ~ 'l` ft. (Seasonal High Water Table elevation)
OGm sand (must be a sandy loam, loamy snnd, or loam texture
2. ~ in./hr.
Basin Design Parameters

Drainage Area _
~ 5 ~ Sb0
sq.ft. (on-site and off-site drainage to tla.e basin)
Impervious Area 3 Q~ sq.ft. (on-site and off-site drainage to tlxe basin)
Design Storm l inch (1.5 inch event for SA waters, 1 inch event for others)
Design Volume 14'~ i c.f. (storage volume regatired)
Inlet Velocity `~1 fps
Drawdown Time Z ~ hours
Basin Elevations
Temporary Pool Elevation ~1 < o fmsl (elevation of the bypass/ocrtlet stnccture)
Planting Elevation ~ fmsl (elevation of the gro~.rnd surface bottom)
Bottom Elevation .O fmsl (elevation of the bottom of the planting media)
Basin Dimensions
Basin Size ~Z ft. x ~~ ft. _ ~ ~d sq. ft. (surface cu•ea at basin bottom)
Basin Volume Provided ~7~ c.f.
SWU-108 4.07
Page ] of 4

Basin Plantings
Number of plantings required ~ 3 + .~ stems (400 sterns per acre of 6ioretention area is regticired at a minimum)
Total No. of plantings provided ~9 =Trees ~ + Shrubs IC) (at least 1 tree for every 3 shrubs)
This system (check one) does does not incorporate the use of an under-drain.
(Under-drains are not allowed for those projects that drain to class SA waters.)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000. These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met, attach written justification. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
1 a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
_~_ b. No vertical sand bed is proposed.
~ ~ c. The bioretention area is at least 15 feet wide by 40 feet long.
$~NeT fL~CaUt+Z6fl PAR NC.Qa/N',2B~1P 111ANV~L 'EFFfrCTIVt ;)~zy 2, 200
_ d. A grass buffer strip and sheet flow conditions are provided at the inlet.
~ ~'~ e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
~~' f. Ponding depth of 6-12" is provided.
g. In-situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
~ ~ h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
~~ i. The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
~ j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphon~s content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) Include a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
~_ k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
~1~ 1. A detailed planting plan, prepared by a qualified individual, is provided on the plans. This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, construction schedule, etc..
SWU-108 4.07
Page 2 of 4

~~ m. Type of mulch layer and depth is specified on the plans.
~~'~ n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
~~~ o. Plan details for the inlet and outlet structures are provided. (including dimensions and
elevations)
~~ p. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
~_ q. A benchmark is provided to determine the sediment accumulation in the basin area.
~_ r. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
~f s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
~_ t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc. shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every significant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re-seed, re-plant, and re-mulch as necessary to maintain good vegetative and
mulch cover.
Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over-excavating. Over-excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shrubs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shnibs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed.
SWU-108 4.07
Page 3 of 4

8. Soil testing shall be conducted annually to determine pH and any accumulation of toxins in the planting media.
Lime or other alkaline substances shall be applied as recommended per the soil test and toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. All components of the bioretention area system shall be maintained in good working order.
10. If the Division determines that the system is failing, the system will immediately be repaired to original design
specifications. If the system cannot be repaired to perform its design function, other stormwater control devices
as allowed by NCAC 2H .1000 must be designed, approved and constructed.
1 acknowledge and agree by my signature below that I am responsible for the performance of the ten maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or responsible party.
Print name: ~('1 L~Pr~ Ian ~ 4nCo
Title: {~ceS~+G~e~t
Address: 809 }~~bri4l~1' l~~~e 12,a~C~~h (v C, ~.1(al2
Phone:
Signatu
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 [he subdivision has been named the president.
1, _~~ ~~ . P ~ ~«~ , a Notary Public for the State of ~tK~. l~ata~~~RU~
County of ~,d, ) Q~~p ~ , do hereby certify that `~O~^,j Q. ~n'"'~" \1j ~. 0.t\ C_ C"
personally appeared before me this ~_day of ~, c i~,~ ¢~~ ~ I ,and acknowledge the
due execution of the forgoing bioretention basin maintenance requirements. Witness my hand and official seal,
KELLY E. PIERCE
NOTARY PUBLIC
WAKE COUNTY, N.C.
My Commission Expires 4-18-2012.
SEAL
My commission expires ~ ~ ~ ~~ bbl ~
S W U-108 4.07
Page 4 of 4

Bioretention Area 2
RECARGA 2.X
Date: 18-7u1-2007 12:41:11
Output File: Bioretention Area 2.txt
Number of time steps= 289
CPU elapsed time (s)= 0
INPUT TERMS
%Impervious= 45
Pervious CN= 74
Facility Area (sf)= 1500
Trib. Area (AC)= 1.73
RATIOimp2rg= 22.6076
RATIOperv2rg= 27.6316
LAYER DEPTH (in) Ksat (in/hr) TEXTURE
Depression 12 --- ---
Root Zone 36 4.14 1
storage 4 10.00 1
Native --- 1.28 3
Init. Cond.: suc tion head (in)= -39
Max. underdrain flow (in/hr)= 0.010
underdrain diam (in)= 4.003
WATER BALANCE TE RMS
volume(ac-ft) Depth (in) %of Inflow
Inflow 0.06 0.41 100.00
Runoff 0.00 0.00 0.00
Recharge 0.05 0.31 75.57
Evaporation 0.00 0.00 1.13
underdrain 0.02 0.16 38.29
Storage -0.01 -0.06 -14.98
Infiltrated 0.06
Precip. 1.00
Imp. Inflow 0.04 0.86 66.62
Perv.Inflow 0.00 0.02 2.19
Basin Stayon(in) -36.78
Total stayon(in) 0.84
Mass Balance checks:
vinsoil=input-roff-dvh
vinsoil (ac-ft)= 6.024876e-002
vinf difference (%)= 0.0
vrechargl=inf-et-dsws
vrechar~l (ac-ft)= 4.553151e-002
vrech difference (%)= 0.0
dvsoil=inf-tech-et
dvsoil= 1.403836e-002
dvsfce (ac-ft)= O.000OOOe+000
dvs2=input-roff-inf
dvs2 (ac-ft)= -1.152093e-017
PLANT SURVIVABILITY TERMS
total time ponded (h)= 2.8
max time ponded (h)= 2.8
total time Rz saturated (h)= 3.8
total time Rz at wilting ppoint (h)= 0.0
total time Tz saturated (h)= 4.0
max time Rz saturated (h)= 3.8
max time Rz at wilting point (h)= 0.0
max time Tz saturated (h)= 4.0
near saturated times for simulation= 1
15.8 3.8
wilting point times for simulation= 0
0.0 0.0
ponded times for simulation= 1
15.0 2.8
overflow times for simulation= 0
0.0 0.0
Page 1

Permit No. ~X~ U-~' UO~ I V Z
DWO Stormwater Management Plan Review
A complete Stormwater management plan submittal includes a Stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all stormwater conveyances and system details.
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
Tlzis form nzay be photocopied for use as an original.
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
I. PROJECT INFORMATION
Project Name : ~ eCr~~`
Contact Person: r-kc.rol C'

Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to: __ `~
(must rnatclz the DA # on the application & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsl).
Soils Report Summary
In-Situ Soil Type
In-Situ Soil Infiltration Rate
SHWT Elevation
Planting Soil Texture
Planting Soi] Infiltration Rate
Basin Design Parameters
~'1
~' ~ ~ ~ in./hr. (the most restrictive soil layer)
~ O 'I` ft. (Seasonal High Water Table elevation)
YY1 SGy1G` (must be a sandy loam, loamy sand, or loam texture
~ • in,/hr.
Drainage Area ~~? ~' sq.ft. (on-site and off-site drainage to the basin)
Impervious Area ~ 0 sq.ft. (on-site and off-site drainage to the basin)
Design Storm 1 inch (1.5 inch event for SA waters, 1 inch event for others
Design Volume 3:~! ~ c.f. (storage volume required)
Inlet Velocity ~4, fps
Drawdown Time 3.v hnnrc
Basin Elevations _
Temporary Pool Elevation 3~J~1. 7 ~ fmsl (elevation of the bypass/outlet stnrctiu~e)
Planting Elevation 3 .7~ fmsl (elevation of the ground surface bottom)
Bottom Elevation ~~• ~ fmsl (elevation of the bottom of the planting media)
Basin Dimensions
Basin Size ~ ft. x l Z ft. _ ~~ sq, ft. (surface area at basin bottom)
Basin Volume Provided 5ZS c.f.
SWU-108 4.07
Page 1 of 4

*~
Basin Plantings
Number of plantings required ~!~ ~L stems (400 stems per acre of bioretention area is required at a minimum)
Total No. of plantings provided ~1 =Trees _j._ + Shrubs~_ (at least 1 tree for every 3 sliru6s)
This system (check one) does does not incorporate the use of an under-drain.
(Under-drains are not allowed for those projects that drain to class SA waters.)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000. These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met, attach written justification. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
~_ a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
~_ b. No vertical sand bed is proposed.
~ ~ c. The bioretention area is at least 15 feet wide by 40 feet long.
~Ncv R~l~l)1fLE© ~tR NLO~rv2gr~1P Y11ANV~L F.FFfrtTlVt avi.y Z, 2~7
_ d. A grass buffer strip and sheet flow conditions are provided at the inlet.
~ ~~ e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
~~" f. Ponding depth of 6-12" is provided.
~_ g. In-situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
~ ~ h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
~`~ i. The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
~~ j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphon~s content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) Include a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
x~ r_ k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
y 1. A detailed planting plan, prepared by a qualified individual, is provided on the plans. This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, construction schedule, etc..
SWU-108 4.07
Page 2 of 4

.:.
~~' m. Type of mulch layer and depth is specified on the plans.
~~'~„_ n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
H~'y o. Plan details for the inlet and outlet structures are provided. (including dimensions and
elevations)
~~ p. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
~_ q. A benchmark is provided to determine the sediment accumulation in the basin area.
~~' r. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
M ~'~ t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc. shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every significant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re-seed, re-plant, and re-mulch as necessary to maintain good vegetative and
mulch cover.
3. Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over-excavating. Over-excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
S. Prune trees and shrubs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shrubs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed
SWU-108 4.07
Page 3 of 4

8. Soil testing shall be conducted annually to determine pH and any accumulation of toxins in the planting media.
Lime or other alkaline substances shall be applied as recommended per the soil test and toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. All components of the bioretention area system shall be maintained in good working order.
10. If the Division determines that the system is failing, the system will immediately be repaired to original design
specifications. If the system cannot be repaired to perform its design function, other stormwater control devices
as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the ten maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or responsible party.
Print name: ~t,bel`~ Polanco
Title: ~t'eS~i~e/tt
Address: 8 ~ 09 ~ I b ri 4 hfi ~ri y e 12, c~.~ (~ q h N C, 21(x 12
Phone: ~I cl ~Iq ~~33 ~
Signature: ~ °~'~,~~ ~~ ~i 1
Date:
Note: The egally 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, __~ ~~ , P 12.«.-- , a Notary Public for the State of ~ t~``r~{~.1.., ac'G~~~RCJ4.
County of ~ ~, ~,~,Q ~ , do hereby certify that ~ Q Cn~'~" \ ~(Z, 0.f\ C n
personally appeared before me this ~_day of ~ ~~~ 1 ,and acknowledge the
due execution of the forgoing bioretention basin maintenance requirements. Witness my hand and official seal,
KELLY E. PIERCE
NOTARY PUBLIC
W^KE COUNTY, N.C.
My Commission Expires 4-18-2012.
SEAL
My commission expires ~ ~ ~ 'b~ ~b1 .~
SWlJ-108 4.07
Page 4 of 4

Bioretention Area 3
RECARGA 2.X
Date: 18-7u1-2007 12:44:43
output File: Bioretention Area 3.txt
Number of time steps= 289
CPU elapsed time (s)= 0
INPUT TERMS
%Impervious= 41
Pervious CN= 74
Facility Area (sf)= 400
Trib. Area (AC)= 0.52
RATloimp2rg= 23.2175
RATloperv2rg= 33.4105
LAYER DEPTH (in)
Depression 12
Root zone 36
Storage 4
Native ---
Ksat (in/hr) TEXTURE
4.14 1
10.00 1
1.28 3
Init. Cond.: suction head (in)= -39
Max. underdrain flow (in/hr)= 0.010
underdrain diam (in)= 4.003 '
WATER BALANCE TE RMS
volume(ac-ft) Depth (in) %of Inflow
Inflow 0.02 0.38 100.00
Runoff 0.00 0.00 0.00
Recharge 0.01 0.28 73.67
Evaporation 0.00 0.00 1.09
underdrain 0.01 0.15 39.75
Storage -0.00 -0.05 -14.51
Infiltrated 0.02
Precip. 1.00
Imp. Inflow 0.04 0.86 248.75
Perv.Inflow 0.00 0.02 9.63
Basin Stayon(in) -33.42
Total Stayon(~n) 0.85
Mass Balance Checks:
vinsoil=input-roff-dvh
vinsoil (ac-ft)= 1.657127e-002
vinf difference (%)_ -0.0
vrechargl=inf-et-dsws '
vrechar~l (ac-ft)= 1.220798e-002
vrech difference (%)_ -0.0
dvsoil=inf-rech-et
dvsoil= 4.182250e-003
dvsfce (ac-ft)= O.000OOOe+000
dvs2=input-roff-inf
dvs2 (ac-ft)= 2.880232e-018
PLANT SURVIVABILITY TERMS
total time ponded (h)= 3.0
max time ponded (h)= 3.0
total time Rz saturated (h)= 3.8
total time Rz at wilting point (h)=
total time Tz saturated (h)= 4.0
max time Rz saturated (h)= 3.8
max time Rz at wilting point (h)=
max time Tz saturated (h)= 4.0
near saturated times for simulation=
15.8 3.8
wilting point times for simulation=
0.0 0.0
ponded times for simulation= 1
15.3 3.0
overflow times for simulation= 0
0.0 0.0
0.0
0.0
1
0
Page 1

Permit No. ~~P ~% ~ ' UU~ I
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
Tl2is form may be photocopied for use as an original.
DWO Stormwater Management Plan Review
A complete Stormwater management plan submittal includes a Stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all Stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name : CeCftti~ l~..i t
Contact Person: I-~(C.f p I Cl ~ ~l lc
Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to:
(must match the DA # on the application & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsl).
Soils Report Summary
In-Situ Soil Type
In-Situ Soil Infiltration Rate
SHWT Elevation
Planting Soil Texture
Planting Soil Infiltration Rate
Basin Design Parameters
~ ~ ~ ~ in./hr. (the most restrictive soil layer)
~ 0 't" ft. (Seasonal High Water Table elevation)
I OG~my sand (must be a sandy loam, loamy sand, or loam texture)
~.: c7 in./hr.
Drainage Area S2, 30U sq.ft. (on-site and off-site drainage to the basin)
Impervious Area Z(o, l 0~ sq.ft. (on-site and off-si.te drainage to the basin)
Design Storm I inch (1.5 inch event for SA waters, 1 inch event for others)
Design Volume 11 c.f. (storage volume required)
Inlet Velocity Z fps
Drawdown Time ~ 5 hours
Basin Elevations
Temporary Pool Elevation
Pl
ti
El
i ~~75
~ fmsl (elevation of the bypass/ocrtlet structure)
an
ng
evat
on fms] (elevation of the ground satiface bottom)
Bottom Elevation (? ~7J fmsl (elevation of the bottom of the planting media)
Basin Dimensions
Basin Size ~_ ft. x ~ ~- ft. _ ~y~ sq. ft. (scrrface area at baser bottom)
Basin Volume Provided ~~ c.f.
SWU-108 4.07
Page 1 of 4

Basin Plantings
Number of plantings required ~~ ~ ~ stems (400 stems per acre of bioretention area is regcrrred at a minimum)
Total No. of plantings provided ~ S =Trees ~F + Shrubs ~ ~ (aa least 1 tree for every 3 slirirbs)
This system (check one) does does not incorporate the use of an under-drain.
(Under-drains are not allowed for those projects that drain to class SA waters.)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000. These requirements are subject to change in
accordance with the manual and rues.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met, attach written justcfication. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
_~_ a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
_ b. No vertical sand bed is proposed.
~ ~ c. The bioretention area is at least 15 feet wide by 40 feet long.
~Nc~r 2~a~~REO ~rR Ncornr.2e-~P mRrv;;~z ~i=F~Z~IVE :)v~,y 2; 2007
d. A grass buffer strip and sheet flow conditions are provided at the inlet.
H ~"~ e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
~~'' f. Ponding depth of 6-12" is provided.
_~~ g. In-situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
~ ~ h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
~~ i. The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
~ 1~ j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphorus content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) Include a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
~~ k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
~~~ 1. A detailed planting plan, prepared by a qualified individual, is provided on the plans, This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, constriction schedule, etc..
SWU-108 4.07
Page 2 of 4

"~,y m. Type of mulch layer and depth is specified on the plans.
~~`' n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
~~ o. Plan details for the inlet and outlet structures are provided. (including dimensions and
elevations)
~~ p. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
~_ q. A benchmark is provided to determine the sediment accumulation in the basin area.
~_ r. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
M~_ s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
H~- t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc. shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every significant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re-seed, re-plant, and re-mulch as necessary to maintain good vegetative and
mulch cover.
Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over-excavating. Over-excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shrubs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shrubs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed
SWU-108 4.07
Pace 3 of 4

8. Soil testing shall be conducted annually to determine pH and any accumulation of toxins in the planting media.
Lime or other alkaline substances shall be applied as recommended per the soil test and toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. All components of the bioretention area system shall be maintained in good working order.
10. If the Division determines that the system is failing, the system will immediately be repaired to original design
specifications. If the system cannot be repaired to perform its design function, other stormwater control devices
as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknow]edge and agree by my signature below that I am responsible for the performance of the ten maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or responsible party.
Print name: ~~ber~ Polanco
Title: ~('8S`tG~e/1t
Address: ~Og ~ I b ri q ~fi l7ri ~ e ~. ~~ ~ ~~ [V L 21 to l 2
Phone: ~ ~ e1 API q ~~ 3 3 n
Signature:'~~~ttt5`/' l></ikt" ~~,~ it ~r l
Date:
Note: The egally responsible party should not be a homeowners association unless more than 50°l0 of the lots have been sold and a
resident of the subdivision has been named the president.
I, ~ ~.. ~ 12.«- , a Notary Public for the State of ~,~ bf~1. l.. ara~~~RG4.
County of ~ A ~~,,p ~ , do hereby certify that O 2. Cn~ ~~j~_ O~.f~ C t'~
personally appeared before me this ~_day of _ ~~~ / ,and acknowledge the
due execution of the forgoing bioretention basin maintenance requirements. Witness my hand and official seal,
KELLY E. PIERCE
NOTARY PUBLIC
WAKE COUNTY, N.C.
C~mmissfon Expires 4-18-2012.
SEAL
My commission expires ~ ~ ~ ~~ ~b1 ~,
SWU-108 4.07
Page 4 of 4

Bioretention Area 4
RECARGA 2.X
Date: 18-7u1-2007 12:48:29
Output File: Bioretention Area 4.txt
Number of time steps= 289
CPU elapsed time (s)= 0
INPUT TERMS
%Impervious= 50
Pervious CN= 74
Facility Area (sf)= 600
Trib. Area (AC)= 1.2
RATloimp2rg= 43.56
RATloperv2rg= 43.56
LAYER DEPTH (in)
Depression 12
Root zone 36
Storage 4
Native ---
Ksat (in/h r) TEXTURE
4.14 1
10.00 1
1.28 3
Init. Cond.: suction head (in)= -39
Max. underdrain flow (in/hr)= 0.010
underdrain diam (in)= 4.003
WATER BALANCE TERMS
volume(ac-ft) Depth (in) %of Inflow
Inflow 0.05 0.45 100.00
Runoff 0.00 0.03 7.73
Recharge 0.02 0.23 51.91
Evaporation 0.00 0.00 0.60
underdrain 0.02 0.21 47.61
Storage -0.00 -0.04 -7.86
Infiltrated 0.04
Precip. 1.00
Imp. Inflow 0.08 0.86 170.88
Perv.Inflow 0.00 0.02 4.60
Basin Stayon(in) -40.97
Total Stayon(in) 0.75
Mass Balance Checks:
vinsoil=input-toff-dvh
Vinsoil (ac-ft)= 4.175889e-002
vinf difference (%)= 0.0
vrechargl=inf-et-dsws
vrechar~l (ac-ft)= 2.349548e-002
vrech difference (%)_ -0.0
dvsoil=inf-tech-et
dvsoil= 1.799186e-002
dvsfce (ac-ft)= O.000OOOe+000
dvs2=input-toff-inf
dvs2 (ac-ft)= -2.304185e-017
PLANT SURVIVABILITY TERMS
total time ponded (h)= 6.5
max time ponded (h)= 6.5
total time Rz saturated (h)= 7
total time Rz at wilting point (h)=
total time Tz saturated (h)= 7
max time Rz saturated (h)= 7
max time Rz at wilting point (h)=
max time Tz saturated (h)= 7
near saturated times for simulation=
19.3 7.8
wilting point times for simulation=
0.0 0.0
ponded times for simulation=
18.3 6.5
overflow times for simulation=
0.0 0.0
8
0.0
8
8
0.0
8
1
0
1
0
Page 1

Permit No. ~XP U-~ ` U(?~ I Y
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original.
DWO Stormwater Management Plan Review
A complete Stormwater management plan submittal includes a Stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all Stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name : ~ 2Cf ~~' l~..i C~
Contact Person: i-1~.~01 Cl Vdllc?
Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to: ~~
(must match the DA # on the application & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsl).
Soils Report Summary
In-Situ Soil Type
In-Situ Soil Infiltration Rate
SHWT Elevation
Planting Soil Texture
Planting Soi] Infiltration Rate
~, -~
? ~ `~ in./hr. (the most restrictive soil layer)
~ ~ '1` ft. (Seasonal High Water Table elevation)
OGm SGn G (moist be a sandy loam, loamy sand, or loam texture)
Z ~ ~ in./hr.
Basin Design Parameters
Drainage Area ~ 3t ~~ Q' sq.ft. (on-site and off-site drainage to tlae basin)
Impervious Area 21 t D~Q sq.ft. (on-site and off-site drainage to the basin)
Design Storm I inch (1.5 inch event for SA waters, 1 inch event for others)
Design Volume ~1~0 c.f. (storage volume required)
Inlet Velocity ~ ~- fps
Drawdown Time hours
Basin Elevations
Temporary Pool Elevation 35g~7S fmsl (elevation of the bypass/ocrtlet stn~ctccre)
Planting Elevation ~ fmsl (elevation of the ground surface bottom)
Bottom Elevation 3Sb ~ 1 S fmsl (elevation of the bottom of the planti~ag media)
Basin Dimensions
Basin Size ~~ ft. x ZZ ft. _ ~~Ud sq. ft. (surface area at basin bottom)
Basin Volume Provided 1225 c.f.
SWU-103 4.07
Page 1 of 4

Basin Plantings ,L
Number of lantin s re uired a
P g q Stems (400 sterns per acre of bioretention area is required at a rninimurn)
Total No. of plantings provided ~~ =Trees =~ + Shrubs 7 (at least 1 tree for every 3 shrctbs)
This system (check one) does does not incorporate the use of an under-drain.
(Under-drains are not allowed for those projects that drain to class SA waters.)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000. These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met, attach written justification. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
b. No vertical sand bed is proposed.
~ ~ c. The bioretention area is at least 15 feet wide by 40 feet long.
~Ner Rirt~ulrtE© ~rR NC.QCrv~LB~1P YYIANV~L EpFIrZ'~IVt JUi_y 2; 2007
~~_ d. A grass buffer strip and sheet flow conditions are provided at the inlet.
H ~'~ e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
~_ f. Ponding depth of 6-12" is provided.
~_ g. In-situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
~ ~ h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
~~ i. The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
N F~ j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphonis content to
promote phosphorus removal. (P-Index of 20 to 40 is optima].) Include a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
~_ k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
~~~ 1. A detailed planting plan, prepared by a qualified individual, is provided on the plans. This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, construction schedule, etc..
SWU-108 4.07
Page 2 of 4

N-~,`( m. Type of mulch layer and depth is specified on the plans.
~~'` n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
N~'~ o, Plan details for the inlet and outlet structures are provided. (including dimensions and
elevations)
N~ p. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
_~_ q. A benchmark is provided to determine the sediment accumulation in the basin area.
~_ r. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
~l s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
H ~~'~ t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc. shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every significant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re-seed, re-plant, and re-mulch as necessary to maintain good vegetative and
mulch cover.
Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over-excavating. Over-excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shrubs and remove debris on an annual basis, Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shnibs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed
SWU-108 4.07
Page 3 of 4

8. Soil testing shall be conducted annually to determine pH and any accumulation of toxins in the planting media.
Lime or other alkaline substances shall be applied as recommended per the soil test and toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. All components of the bioretention area system shall be maintained in good working order.
10. If the Division determines that the system is failing, the system will immediately be repaired to original design
specifications. If the system cannot be repaired to perform its design function, other stormwater control devices
as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the ten maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or responsible party.
Print name: ~c,ber~ ho I artco
Title: ~CBSiG~e/-t
Address: ga0q ~Ibrighfi +~~~e ~.~~(~~ NC, 21(al2
Phone:
Signatu
Date:
Note: The egally 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, ~!C`~7~ ~, . ~1 e.~C~~ , a Notary Public for the State of ~~ I9`C~. ~ a.e'G1~~t1CJ~,,.
County of ~ Jl ~~lP ~ , do hereby certify that O ~n'T ~ [~~ 0.f\ C ~
personally appeared before me this ~_day of ~~~ " / ,and acknowledge the
due execution of the forgoing bioretention basin maintenance requirements. Witness my hand and official seal,
KELLY E. PIERCE
NOTARY PUBLIC
WAKE COUNTY, N.C.
My C~mmisslon Expires 4-18-212.
SEAL
My commission expires ~ ~ ~ 'b~ ~b~ :~,
SWU-108 4.07
Page 4 of 4

i
Bioretention Area 5
RECARGA 2.X
Date: 18-7u1-2007 12:49:39
Output File: Bioretention Area 5.txt
Number of time steps= 289
CPU elapsed time (s)= 0
INPUT TERMS
%Impervious= 50
Pervious CN= 74
Facility Area (sf)= 1000
Trib. Area (AC)= 1
RATIOimp2rg= 21.78
RATIOperv2rg= 21.78
LAYER DEPTH (in) Ksat (in/hr) TEXTURE
Depression 12 --- ---
Root Zone 36 4.14 1
Storage 4 10.00 1
Native --- 1.28 3
Init. Cond.: suction head (in)= -39
Max. underdrain flow (in/hr)= 0.010
underdrain diam (in)= 4.003
WATER BALANCE TERMS
volume(ac-ft) Depth (in) %of Inflow
Inflow 0.04 0.45 100.00
Runoff 0.00 0.00 0.00
Recharge 0.03 0.35 76.67
Evaporation 0.00 0.01 1.17
underdrain 0.01 0.17 37.80
Storage -0.01 -0.07 -15.64
Infiltrated 0.04
Precip. 1.00
Imp. Inflow 0.04 0.86 100.33
Perv.Inflow 0.00 0.02 2.70
Basin Stayon(in) -40.97
Total Stayon(in) 0.83
Mass Balance Checks:
vinsoil=input-toff-dvh
vinsoil (ac-ft)= 3.854105e-002
vinf difference (%)_ -0.0
vrechargl=inf-et-dsws
vrechar~l (ac-ft)= 2.954854e-002
vrech difference (%)_ -0.0
dvsoil=inf-tech-et
dvsoil= 8.539909e-003
dvsfce (ac-ft)= O.000OOOe+000
dvs2=input-toff-inf
dvs2 (ac-ft)= 5.760464e-018
PLANT SURVIVABILITY TERMS
total time ponded (h)= 2.8
max time ponded (h)= 2.8
total time Rz saturated (h)= 3.5
total time Rz at wilting point (h)= 0.0
total time Tz saturated (p)= 3.5
max time Rz saturated (h)= 3.5
max time Rz at wilting point (h)= 0.0
max time Tz saturated (p)= 3.5
near saturated times for simulation= 1
15.5 3.5
wilting point times for simulation= 0
0.0 0.0
ponded times for simulation= 1
15.0 2.8
overflow times for simulation= 0
0.0 0.0
Page 1

Permit No. ~XP ~ ~ " OU `' ~ Y Z.
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
This form may be photocopied for use ns an original.
DWO Stormwater Management Plan Review
A complete Stormwater management plan submittal includes a Stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name
Contact Person: 1-tc,~
i Ck ~
Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to: ~O
(must match the DA # on the application & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. Al] elevations shall be in feet mean sea level
(fms]).
Soils Report Summary
In-Situ Soil Type
In-Situ Soil Infiltration Rate
SHWT Elevation
Planting Soil Texture
Planting Soi] Infiltration Rate
t '%
? ~ ~ ~ in./hr. (the most restrictive soil layer)
~ ~ "1` ft. (Seasonal High Water Table elevation)
dQY11 SGrI Q _ (must be a sandy loam, loamy sand, or loam texture)
2. in./hr.
Basin Design Parameters
Drainage Area ~Q ~ Sq.ft. (on-site and off-site drainage to the basin)
Impervious Area ~(.~ sq.ft. (on-site and off-site drainage to the basin)
Design Storm 1 inch (1.5 inch event for SA waters, 1 inch event for others)
Design Volume J 2 c.f. (storage volume required)
Inlet Velocity 3.95 fps
Drawdown Time ~ 5 hours
Basin Elevations _
Temporary Pool Elevation ~~~ ~ ~ fmsl (elevation of t/ze bypass/outlet structure)
Planting Elevation ?J~ . v fmsl (elevation of the ground surface bottom)
Bottom Elevation 370 ~ a fmsl (elevation of the bottom of the planting media)
Basin Dimensions
Basin Size 3~3 ft. x ~ V ft. _ ~~o sq. ft. (surface area at basin bottom)
Basin Volume Provided 775 c.f.
SWU-108 4.07
Page 1 of 4

Basin Plantings _
Number of plantings required ~ , 5 stems (400 stems per acre of bioretention area is required at a minimum)
Tota] No. of plantings provided ~O =Trees 2 + Shrubs. ~ (at least 1 tree for every 3 shrubs)
This system (check one) does does not incorporate the use of an under-drain.
(Under-drains are not allowed for those projects that drain to class SA waters.)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000. These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met, attach written justification. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
+~ a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
~_ b. No vertical sand bed is proposed.
~ ~ c. The bioretention area is at least 15 feet wide by 40 feet long.
~Nc~ Rrrau~rcEO ~1rR Nc,o~nl~2evnP rrIANV~Z ~~FrC~-V~ avly 2; 2cc7
_; 1~'` d. A grass buffer strip and sheet flow conditions are provided at the inlet.
~_ e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
~~' f. Ponding depth of 6-12" is provided.
g. In-situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
~ ~ h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
~~~ i. The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
~ ~~ j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphonis content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) Include a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
~_ k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
~_ 1. A detailed planting plan, prepared by a qualified individual, is provided on the plans. This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, construction schedule, etc..
SWU-108 4.07
Page 2 of 4

N~',`~ m. Type of mulch layer and depth is specified on the plans.
~~ n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
Nay o. Plan details for the inlet and outlet structures are provided. (including dimensions and
elevations)
~~ p. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
~_ q. A benchmark is provided to determine the sediment accumulation in the basin area.
~_ r. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
~,~,,,~ length is 50 feet for SA waters, 30 feet for other waters).
' "~~ s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
H~- t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc. shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every significant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re-seed, re-plant, and re-mulch as necessary to maintain good vegetative and
mulch cover.
Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over-excavating. Over-excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shrubs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shn~bs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed
SWU-108 4.07
Page 3 of 4

8. Soil testing shall be conducted annually to determine pH and any accumulation of toxins in the planting media.
Lime or other alkaline substances shall be applied as recommended per the soil test and toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. Al] components of the bioretention area system shall be maintained in good working order.
10. If the Division determines that the system is failing, the system will immediately be repaired to original design
specifications. If the system cannot be repaired to perform its design function, other stormwater control devices
as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the ten maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or responsible party.
Print name: ~c~berf Pola~co
Title: ~C2SiG~~~t
Address: _8$.49 ~ I b ri 4 ~~' 17ri ~ e 12 t~~ U g ti N L 27 (a 12
Phone:
Signatu
Date:
Note: The egally 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, __ ' ~~ . P 12.~C~2_- , a Notary Public for the State of ~~ [~~~. 1...,Ci.t'G~~~R~l~.
County of ~ A ~ b.~p ~ , do hereby certify that b ~'~ ~ CZ~- 0.n ~' (''~
personally appeared before me this ~_day of ~ ~~~ ,and acknowledge the
due execution of the forgoing bioretention basin maintenance requirements. Witness my hand and official seal,
KELLY E. PIERCE
NOTARY PUBLIC
WAKE COUNTY, N.C.
My Commission Expires 4-18-2Q12.
SEAL
My commission expires ~ '~ 1 'b~ ~b1
SWU-108 4.07
Page 4 of 4

Bioretention Area 6
RECARGA 2.X
Date: 18-7u1-2007 12:51:26
Output File: Bioretention Area 6.txt
Number of time steps= 289
CPU elapsed time (s)= 0
INPUT TERMS
%Impervious= 100
Pervious CN= 74
Facility Area (sf)= 600
Trib. Area (AC)= 0.22
RATloimp2rg= 15.972
RATIOperv2rg= 0
LAYER DEPTH (in) Ksat (in/hr) TEXTURE
Depression 12 --- ---
Root Zone 36 4.14 1
Storage 4 10.00 1
Native --- 1.28 3
Init. Cond.: suction head (in)= -39
Max. underdrain flow (in/hr)= 0.010
underdrain diam (in)= 4.003
WATER BALANCE TERMS
volume(ac-ft) Depth (in) %of Inflow
Inflow 0.02 0.86 100.00
Runoff 0.00 0.00 0.00
Recharge 0.02 0.78 90.82
Evaporation 0.00 0.01 1.62
underdrain 0.00 0.25 29.38
Storage -0.00 -0.19 -21.82
Infiltrated 0.02
Precip. 1.00
Imp. Inflow 0.03 0.86 168.83
Perv.Inflow 0.00 0.00 0.00
Basin Stayon(in) -85.22
Total Stayon(in) 0.75
Mass Balance Checks:
vinsoil=input-roff-dvh
vinsoil (ac-ft)= 1.679676e-002
vinf difference (%)_ -0.0
vrechargl=inf-et-dsws
vrechargl (ac-ft)= 1.525549e-002
vrech difference (%)_ -0.0
dvsoil=inf-rech-et
dvsoil= 1.269715e-003
dvsfce (ac-ft)= O.000OOOe+000
dvs2=input-roff-inf
dvs2 (ac-ft)= 2.880232e-018
PLANT SURVIVABILITY TERMS
total time ponded (h)= 1.5
max time ponded (h)= 1.5
total time Rz saturated (h)= 2.3
total time Rz at wilting point (h)= 0.0
total time Tz saturated (h)= 2.5
max time Rz saturated (h)= 2.3
max time Rz at wilting point (h)= 0.0
max time Tz saturated (h)= 2.5
near saturated times for simulation= 1
14.5 2.3
wilting point times for simulation= 0
0.0 0.0
ponded times for simulation= 1
14.0 1.5
overflow times for simulation= 0
0.0 0.0
Page 1

ti
Permit No. ~XP U ~' ()()~ ~ Y Z.
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original.
DWO Stormwater Management Plan Review:
A complete Stormwater management plan submittal includes a Stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name : ~QLf ~~' ~ i C:l.
Contact Person: Nlu,~ol Cl. V Qll~
Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to: ~
(must match the DA # on the application & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsl).
Soils Report Summary
In-Situ Soil Type
In-Situ Soil Infiltration Rate
SHWT Elevation
Planting Soil Texture
Planting Soil Infiltration Rate
Basin Design Parameters
~- '~
? ~ ~ ~ in./hr. (the most restrictive soil layer)
I ~ 'I" ft. (Seasonal High Water Table elevation)
~OGV11 SGth~ (maist be a sandy loam, loamy sand, or loam texture)
'Z • ~ in./hr.
Drainage Area 33~ (Cr1~ sq.ft. (on-site and off-site drainage to the basin)
Impervious Area ZZ, (Q ~ sq.ft. (on-site and off-site drainage to the basin)
Design Storm I inch (1.5 inch event for SA waters, 1 inch event for others)
Design Volume It 04 ~ C.f. (storage volume required)
Inlet Velocity 3 pct ~ fps
Drawdown Time ~~.~ hours
Basin Elevations
Temporary Pool Elevation 3~Z~ ~ fmsl (elevation of the bypass/outlet srnccture)
Planting Elevation ',~7 (~ C3 fmsl (elevation of the ground surface bottom)
Bottom Elevation 3(oS~±<C fmsl (elevation of the bottom of the planting media)
Basin Dimensions
Basin Size ~u ft. x ~~ ft. = I~ sq. ft. (surface area at basin bottom)
Basin Volume Provided I ZSy c.f.
SWU-108 4.07
Page 1 of 4

Basin Plantings
Number of plantings required ~~ ~ stems (400 stems per acre of bioretention area is required at a minimum)
Total No. of plantings provided (U = Trees ~ + Shrubs (at least 1 tree for every 3 sllrcibs)
This system (check one) does does not incorporate the use of an under-drain.
(Under-drains are not allowed for those projects that drain to class SA waters.)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000. These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met, attach written justification. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
+~ a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
b. No vertical sand bed is proposed.
~ ~ c. The bioretention area is at least 15 feet wide by 40 feet long.
~Ner R~t~~~rtEp ~tR NcQi`rv;2emP mAN;;aZ "E~r~~~cl~tt ;)v~y 2; 2eo~
~-~--- d. A grass buffer strip and sheet flow conditions are provided at the inlet.
~ ~''~ e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
~~'' f. Ponding depth of 6-12" is provided.
~_ g. In-situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
~ (~ h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
~`~ i. The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
~ j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphorus content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) Include a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
~~~ ]. A detailed planting plan, prepared by a qualified individual, is provided on the plans. This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, constriction schedule, etc..
SWU-108 4.07
Page 2 of 4

µ~'~ m. Type of mulch layer and depth is specified on the plans.
~~'~ n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
~~_I o. Plan details for the inlet and outlet structures are provided. (including dimensions and
elevations)
~~ p. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
q. A benchmark is provided to determine the sediment accumulation in the basin area.
~~ r. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
~~ s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
N~_ t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc. shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every significant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re-seed, re-plant, and re-mulch as necessary to maintain good vegetative and
mulch cover.
Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over-excavating. Over-excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shrubs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shnibs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed.
SWU-108 4.07
Page 3 of 4

8. Soil testing shall be conducted annually to determine pH and any accumulation of toxins in the planting media.
Lime or other alkaline substances shall be applied as recommended per the soil test and toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. All components of the bioretention area system shall be maintained in good working order.
10. If the Division determines that the system is failing, the system will immediately be repaired to original design
specifications. If the system cannot be repaired to perform its design function, other stormwater control devices
as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the ten maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or responsible party.
Print name: ~t~ber~ Polan~o
Title: ~('2SiG~e/1t
Address: g~0~1 ~Ib~4t~t ~~ve 12.~~(~~h NL 21(a)2
Phone:
Signatu
Date:
Note: The egally 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, ~~ ~, . P 12~~G2-- , a Notary Public for the State of ~,~ tl~~c1. 1.., apt' e~~~ RfJ4.
County of ~ ~l ~ ~~,e ~ , do hereby certify that O Q. ~ k ~ (j~_ 0.t1 C l"~
personally appeared before me this ~~day of ~~~ ,and acknowledge the
due execution of the forgoing bioretention basin maintenance requirements. Witness my hand and official seal,
KELLY E. PIERCE
NOTARY PUBLIC
WAKE COUNTY, N.C.
C~mmisslon Expires 4.18-2012.
SEAL
My commission expires ~ '~ ~ ~b~ .~,
SWU-108 4.07
Pave 4 of 4

Bioretention Area 7
RECARGA 2.X
Date: 18-7u1-2007 12:52:28
Output File: Bioretention Area 7.txt
Number of time steps= 289
CPU elapsed time (s)= 0
INPUT TERMS
%Impervious= 68
Pervious CN= 74
Facility Area (sf)= 1050
Trib. Area (AC)= 0.76
RATIOimp2rg= 21.4398
RATIOperv2rg= 10.0893
LAYER DEPTH (in)
Depression 12
Root Zone 36
Storage 4
Native ---
Ksat (in/h r) TEXTURE
4.14 1
10.00 1
1.28 3
Init. Cond.: suction head (in)= -39
Max. Underdrain flow (in/hr)= 0.010
underdrain diam (in)= 4.003
WATER BALANCE TERMS
volume(ac-ft) Depth (in) %of Inflow
Inflow 0.04 0.60 100.00
Runoff 0.00 0.00 0.00
Recharge 0.03 0.47 77.68
Evaporation 0.00 0.01 1.21
Underdrain 0.01 0.22 37.25
Storage -0.01 -0.10 -16.13
Infiltrated 0.04
Precip. 1.00
Imp. Inflow 0.04 0.86 96.77
Perv.Inflow 0.00 0.02 1.23
Basin Stayon(in) -56.08
Total Stayon(in) 0.78
Mass Balance Checks:
vinsoil=input-roff-dvh
vinsoil (ac-ft)= 3.933427e-002
vinf difference (%)_ -0.0
vrechargl=inf-et-dsws
vrechar~l (ac-ft)= 3.055301e-002
vrech difference (%)_ -0.0
dvsoil=inf-rech-et
dvsoil= 8.306031e-003
dvsfce (ac-ft)= O.000OOOe+000
dvs2=input-roff-inf
dvs2 (ac-ft)= 1.152093e-017
PLANT SURVIVABILITY TERMS
total time ponded (h)= 2.5
max time ponded (h)= 2.5
total time Rz saturated (h)= 3
total time Rz at wilting point (h)=
p
total time Tz saturated ( )= 3
max time Rz saturated (h)= 3
max time RZ at wilting point (h)=
max time Tz saturated (h)= 3
near saturated times for simulation =
15.5 3.5
wilting point times for simulation=
0.0 0.0
ponded times for simulation=
14.8 2.5
overflow times for simulation=
0.0 0.0
5
0.0
8
5
0.0
8
1
0
1
0
Page 1

Permit No. a~XP ()-~' f7~FG'' ~ Y 2.
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original.
DWO Stormwater Management Plan Review
A complete Stormwater management plan submittal includes a Stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all Stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name
Contact Person: hk~.~
e
Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to:
(must match the DA # on the application & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsl).
Soils Report Summary
In-Situ Soil Type
In-Situ Soil Infiltration Rate
SHWT Elevation
Planting Soi] Texture
Planting Soil Infiltration Rate
~'1
? ~ ~ ~ in./hr. (the most restrictive soil layer)
~ ~ 'I" ft. (Seasonal High Water Table elevation)
~OGt'n An el (must be a sandy loam, loamy sand, or loam texture)
Z . ~ in./hr.
Basin Design Parameters
Draina e Area x(00
g ~~I sq.ft. (on-site and off-site drainage to t)ze basin)
Impervious Area ~~1~sq.ft. (on-site and off-site drainage to the basin)
Design Storm I inch (1.5 inch event for SA waters, 1 inch event for others)
Design Volume -- ~~ 2 c.f. (storage volume required)
Inlet Velocity ~-t~`9 fps
Drawdown Time ~ ~ hours
Basin Elevations
Temporary Poo] Elevation ~3~~~7~ fmsl (elevation of the bypass/outlet structure)
Planting Elevation 373. 7S fmsl (elevation of the ground surfnce bottom)
Bottom Elevation _ 0. $ fmsl (elevation of the bottom of the planting media)
Basin Dimensions
Basin Size ~_ ft. x ~- ft. _ ~ ~O sq. ft. (su,face area at basin bottom)
Basin Volume Provided ~ c.f.
SWL'-108 4.07
Page 1 of 4

Basin Plantings
Number of plantings required ~ ~~ ~ stems (400 stems per acre of bioretention area is required at a rntnimum)
Total No, of plantings provided ~ 2- =Trees ~_ + Shrubs ~ (at least 1 tree for every 3 shrubs)
This system (check one) does does not incorporate the use of an under-drain.
(Under-drains are not allowed for those projects that drain to class SA waters.)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000. These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met, attach written justification. An incomplete
subnutta] package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
+~ a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
b. No vertical sand bed is proposed.
~ ~ c. The bioretention area is at least 15 feet wide by 40 feet long.
~N~v Rlrt~u~rrEO DER NCQ~nf~Rg~'1P YYIAN~~L E~l'~C~-V~ JUi_y Z; 2007
_ d. A grass buffer strip and sheet flow conditions are provided at the inlet.
~_ e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
~~' f. Ponding depth of 6-12" is provided.
_ g. In-situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
~ ~ h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
~~~ i. The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
~_ j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphonis content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) Include a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
~~ k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
~_ 1. A detailed planting plan, prepared by a qualified individual, is provided on the plans. This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, constniction schedule, etc..
SWU-108 4.07
Page 2 of 4

I~I~", m. Type of mulch layer and depth is specified on the plans.
~~` n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
~~~ o. Plan details for the inlet and outlet structures are provided. (including dimensions and
elevations)
~~ p. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
~_ q. A benchmark is provided to determine the sediment accumulation in the basin area.
~_ r. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
~_ s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc. shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every significant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re-seed, re-plant, and re-mulch as necessary to maintain good vegetative and
mulch cover.
Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over-excavating. Over-excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shrubs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shnibs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed.
SWU-108 4.07
Page 3 of 4

8. Soi] testing shall be conducted annually to determine pH and any accumulation of toxins in the planting media.
Lime or other alkaline substances shall be applied as recommended per the soil test and toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. All components of the bioretention area system shall be maintained in good working order.
10. If the Division determines that the system is failing, the system will immediately be repaired to original design
specifications. If the system cannot be repaired to perform its design function, other stormwater control devices
as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the ten maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or responsible party.
Print name: ~c~ber+ ~0 ~ Ay1Co
Title: ~ces~tc~ent
Address: 809 ~~bn4~'fi ~~~e 12.r^.~li~h (v C, 21(al2
Phone:
Signatu
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, ~~~, . P 12~~G2-- , a Notary Public for the State of ~~ t~``~~. l.. at' C~~~ R~J~,.
County of ~ ~,~ ~,~,~,(.~ ~ , do hereby certify that b~^ Q.. ~'T" ~ [~`„ 0.t\ C ~
personally appeared before me this ~~day of ¢~~ ~ ,and acknowledge the
due execution of the forgoing bioretention basin maintenance requirements. Witness my hand and official seal,
KELLY E. PIERCE
NOTARY PUBLIC
WAKE COUNTY, N.C.
My Crmmisslon Expires 4-18-2012.
SEAL
My commission expires ~ ~ ~ ~~ ~b1
SWU-108 4.07
Page 4 of 4

Bioretention Area 8
RECARGA 2.X
Date: 18-~u1-2007 12:53:47
Output File: Bioretention Area 8.txt
Number of time steps= 289
CPU elapsed time (s)= 0
INPUT TERMS
%Impervious= 50
Pervious CN= 74
Facility Area (sf)= 1300
Trib. Area (AC)= 1.49
RATloimp2rg= 24.9632
RATIOperv2rg= 24.9632
LAYER DEPTH (in)
Depression 12
Root zone 36
Storage 4
Native ---
Ksat (in/hr) TEXTURE
4.14 1
10.00 1
1.28 3
Init. Cond.: suction head (in)= -39
Max. underdrain flow (in/hr)= 0.010
underdrain diam (in)= 4.003
WATER BALANCE TERMS
volume(ac-ft) Depth (in) %of Inflow
Inflow 0.06 0.45 100.00
Runoff 0.00 0.00 0.00
Recharge 0.04 0.32 71.08
Evaporation 0.00 0.00 1.03
underdrain 0.02 0.19 41.56
storage -0.01 -0.06 -13.67
Infiltrated 0.06
Precip. 1.00
Imp. Inflow 0.04 0.86 77.60
Perv.Inflow 0.00 0.02 2.09
Basin Stayon(in) -40.97
Total Stayon(in) 0.81
Mass Balance Checks:
vinsoil=input-roff-dvh
vinsoil (ac-ft)= 5.711276e-002
vinf difference (%)_ -0.0
vrechargl=inf-et-dsws
vrechar~l (ac-ft)= 4.059858e-002
vrech difference (%)_ -0.0
dvsoil=inf-rech-et
dvsoil= 1.592580e-002
dvsfce (ac-ft)= O.000OOOe+000
dvs2=input-roff-inf
dvs2 (ac-ft)= 1.152093e-017
PLANT SURVIVABILITY TERMS
total time ponded (h)= 3.5
max time ponded (h)= 3.5
total time Rz saturated (h)= 4.3
total time Rz at wilting ppoint (h)=
total time Tz saturated ( h)= 4.5
max time Rz saturated (h)= 4.3
max time Rz at wilting ppoint (h)=
max time Tz saturated ( h)= 4.5
near saturated times for simulation=
16.3 4.3
wilting point times for simulation=
0.0 0.0
ponded times for simulation= 1
15.5 3.5
overflow times for simulation= 0
0.0 0.0
0.0
0.0
1
0
Page 1

M~
Permit No. ~~~ ~ ~"UGC ~ ~L'
([o be provided by DWQ)
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original.
DWO Stormwater Management Plan Review:
A complete Stormwater management plan submittal includes a Stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all Stormwater conveyances and system details.
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
I. PROJECT INFORMATION
Project Name : QC[fti~'
Contact Person: ~-kr:.~0~ C'
~~ ~.
Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to:
(must match the DA # on the application & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsl).
Soils Report Summary
In-Situ Soil Type
In-Situ Soil Infiltration Rate
SHWT Elevation
Planting Soil Texture
Planting Soil Infiltration Rate
Basin Design Parameters
Drainage Area
Impervious Area
Design Storm
Design Volume
Inlet Velocity
Drawdown Time
Basin Elevations
Temporary Pool Elevation
Planting Elevation
Bottom Elevation
Basin Dimensions
Basin Size
Basin Volume Provided
SWU-103 4.07
_ '' '~ _
? ~ `~ in./hr. (the most restrictive soil layer)
~ l7 '~' ft. (Seasonal High Water Table elevation)
~UgVtly S~rl ~ (must be a snndy loam, loamy sand, or loam texture)
~ ~ ~ in./hr.
5 Cl © sq.ft. (on-site and off-site drainage to the basin)
700 sq.ft. (on-site and off-site drainage to the basin)
1 inch (1.5 inch event for SA waters, 1 inch event for others)
~_ c.f. (storage volume required)
'3:53 fps
. ~ ~ hours
~ ~ d fmsl (elevation of the bypass/outlet strccctccre)
~~ O fmsl (elevation of the grocmd surface bottom)
7 s O fmsl (elevation of the bottom of the planting media)
~4 _ ft. x ~ ~ ft. _ _~~ J~ sq. ft. (surface area at basin bottom)
~U c.f.
Page 1 of 4

Basin Plantings
Number of plantings required ~ ~ Z stems (400 stuns per acre of bioretention area is required at a mini~na~m)
Total No. of plantings provided Z =Trees _~ + Shrubs L (at least 1 tree for every 3 shrai.bs)
This system (check one) does does not incorporate the use of an under-drain.
(Under-drains are not allowed for those projects that drain to class SA waters,)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000, These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met, attach written justification. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
-~ b. No vertical sand bed is proposed.
~ ~ c. The bioretention area is at least 15 feet wide by 40 feet long.
~N~T R~QUtrtt© PtR NCQ~Nt2g~'1P Y11ANJ~L LF~~LTIVE aULy 2; 2ao7
d. A grass buffer strip and sheet flow conditions are provided at the inlet.
~_ e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
~~' f. Ponding depth of 6-12" is provided.
'-~ g. In-situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
~ ~ h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
~~ i. The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
N F~- j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphorus content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) Include a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
~_ k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
~1~~ 1. A detailed planting plan, prepared by a qualified individual, is provided on the plans. This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, constniction schedule, etc..
SWU-108 4.07
Page 2 of 4

~_ m. Type of mulch layer and depth is specified on the plans.
~~_ n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
~~ o. Plan details for the inlet and outlet stntctures are provided. (including dimensions and
elevations)
~~~ p. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
N~ q. A benchmark is provided to determine the sediment accumulation in the basin area.
~'~ r. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
~_ s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
H ~~'~ t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc. shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every significant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re-seed, re-plant, and re-mulch as necessary to maintain good vegetative and
mulch cover.
Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over-excavating. Over-excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shn~bs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shnibs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed.
SWU-108 4.07
Page 3 of 4

8. Soil testing shall be conducted annually to determine pH and any accumulation of toxins in the planting media.
Lime or other alkaline substances shall be applied as recommended per the soil test and toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. All components of the bioretention area system shall be maintained in good working order.
10. If the Division determines that the system is failing, the system will immediately be repaired to original design
specifications. If the system cannot be repaired to perform its design function, other stormwater control devices
as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the ten maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or responsible party.
Print name: ~~ber~ Pol~nco
Title: {~('2Si G~f ~f
Address: _8~0~ ~IbriGhfi 17r7~e 12a~~igh N (, 2`](al2
Phone:
Signatu
Date: ~ ~ I
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, ___~~~~. - P ~ 2.~C•2- , a Notary Public for the State of ~,~ t~~~C'\. ~ O~.t'G~~~{'ZfJ4.
County of ~ Jl ~~~e ~ , do hereby certify that O Q ~n'~ ~ U~, 0.t\ C t-~
personally appeared before me this ~'~day of ~~~ / ,and acknowledge the
due execution of the forgoing bioretention basin maintenance requirements. Witness my hand and official seal,
KELLY E. PIERCE
NOTARY PUBLIC
WnKE COUNTY, N.C.
My Commission Expires 4-18-2012.
SEAL
My commission expires ~ ~ ~ 'b~ bbl
SWU-108 4.07
Page 4 of 4

Bioretention Area 9
RECARGA 2.X
Date: 18-~u1-2007 12:55:22
output File: Bioretention Area 9.txt
Number of time steps= 289
CPU elapsed time (s)= 0
INPUT TERMS
%Impervious= 47
Pervious CN= 74
Facility Area (sf)= 675
Trib. Area (AC)= 1.26
RATloimp2rg= 38.2166
RATloperv2rg= 43.0954
LAYER DEPTH (in) Ksat (in/hr) TEXTURE
Depression 12 --- ---
Root Zone 36 4.14 1
storage 4 10.00 1
Native --- 1.28 3
Init. Cond.: suction head (in)= -39
Max. underdrain flow (in/hr)= 0.010
underdrain diam (in)= 4.003
WATER BALANCE TERMS
volume(ac-ft) Depth (in) %of Inflow
Inflow 0.04 0.42 100.00
Runoff 0.00 0.01 1.31
Recharge 0.03 0.24 56.83
Evaporation 0.00 0.00 0.68
underdrain 0.02 0.21 50.11
Storage -0.00 -0.04 -8.92
Infiltrated 0.04
Precip. 1.00
Imp. Inflow 0.07 0.86 150.94
Perv.Inflow 0.00 0.02 4.58
Basin Stayon(in) -38.46
Total stayon(~n) 0.78
Mass Balance Checks:
vinsoil=input-roff-dvh
vinsoil (ac-ft)= 4.436657e-002
vinf difference (%)= 0.0
vrechargl=inf-et-dsws
vrechar~l (ac-ft)= 2.554774e-002
vrech difference (%)= 0.0
dvsoil=inf-rech-et
dvsoil= 1.851332e-002
dvsfce (ac-ft)= O.000OOOe+000
dvs2=input-roff-inf
dvs2 (ac-ft)= O.000OOOe+000
PLANT SURVIVABILITY TERMS
total time ponded (h)= 6.3
max time ponded (h)= 6.3
total time Rz saturated (h)= 7.0
total time Rz at wilting ppoint (h)=
total time Tz saturated (h)= 7.5
max time Rz saturated (h)= 7.0
max time Rz at wilting point (h)=
max time Tz saturated (h)= 7.5
near saturated times for simulation=
18.8 7.0
wilting point times for simulation=
0.0 0.0
ponded times for simulation= 1
18.0 6.3
overflow times for simulation= 0
0.0 0.0
0.0
0.0
1
0
Page 1

~~ ~
DWO Stormwater Management Plan Review
A complete Stormwater management plan submittal includes a Stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all stormwater conveyances and system details.
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original.
Permit No. ~XP ~ ?' UC)~ I y Z
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
I. PROJECT INFORMATION
Project Name : QClt~~'
Contact Person: !-~c.rG~~ C
e
Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to: ~d
(must match the DA # on the application & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsl).
Soils Report Summary
In-Situ Soil Type
In-Situ Soil Infiltration Rate
SHWT Elevation
Planting Soi] Texture
Planting Soil Infiltration Rate
Basin Design Parameters
Drainage Area
Impervious Area
Design Storm
Design Volume
Inlet Velocity
Drawdown Time
Basin Elevations
Temporary Pool Elevation
Planting Elevation
Bottom Elevation
Basin Dimensions
Basin Size
Basin Volume Provided
SWU-108 4.07
~ '1
? ~ ~ 3 in./hr. (the most restrictive soil layer)
~ O '~' ft. (Seasonal High Water Table elevation)
~0.Yn Gnd (must be a sandy loam, loamy sand, or loam texture)
i ~-, O in./hr.
sq.ft. (on-site and off-site drainage to tJze basin)
C7 sq.ft. (on-site and off-site drainage to the basin)
inch (1.5 inch event for SA waters, 1 inch event for others)
`4~2 f . s (storage volume required)
- <~L_ p
~5 hours
3 ~'7S fmsl (elevation of the bypass/ocUlet streccture)
33,75 fmsl (elevation of the grocmd surface bottom)
.75 fmsl (elevation of the bottom of the planting medin)
3S ft. x ~_ ft. _
SSV c.f.
.w ~ sq. ft. (surface area at basin bottom)
Page 1 of 4

,l
Basin Plantings
Number of plantings required 3~ stems (400 sterns per acre of bioretention area is required at a rninirnum)
Total No. of plantings provided =Trees ~.._ + Shrubs 3 (at least 1 tree for every 3 sllrcrbs)
This system (check one) does does not incorporate the use of an under-drain.
(Under-drains are not allowed for those projects that drain to class SA waters.)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000. These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met, attach written justification. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
~_ a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
_~_ b. No vertical sand bed is proposed.
~ ~ c. The bioretention area is at least 15 feet wide by 40 feet long.
~N~~ R~au~,zEO ~~R lvcotrv~~-~P rnAN;;~Z .E~Ffrt~tlvt Jvi.y 2; 2007
d. A grass buffer strip and sheet flow conditions are provided at the inlet.
~ ~''i e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
~_ f. Ponding depth of 6-12" is provided.
'~ g. In-situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
~ ~ h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
~~~ i. The planting soi] has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
N F~ j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphon~s content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) Include a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
~~ k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
~_ 1. A detailed planting plan, prepared by a qualified individual, is provided on the plans. This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, constniction schedule, etc..
SWU-108 4.07
Page 2 of 4

~_ m. Type of mulch layer and depth is specified on the plans.
~~`' n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
~~~ o. Plan details for the inlet and outlet structures are provided. (including dimensions and
elevations)
~~ p. Al] side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
q. A benchmark is provided to determine the sediment accumulation in the basin area.
~_ r. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
~~_ s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc. shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every significant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re-seed, re-plant, and re-mulch as necessary to maintain good vegetative and
mulch cover.
Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over-excavating. Over-excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shrubs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shn~bs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed.
SWU-108 4.07
Page 3 of 4

8. Soil testing shall be conducted annually to determine pH and any accumulation of toxins in the planting media.
Lime or other alkaline substances shall be applied as recommended per the soil test and toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. All components of the bioretention area system shall be maintained in good working order.
10. If the Division determines that the system is failing, the system will immediately be repaired to original design
specifications. If the system cannot be repaired to perform its design function, other stormwater control devices
as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the ten maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or responsible party.
Print name: ~c~ber~ Pol~nco
Title: ~('2StG~2/It
Address: g~09 r~~bri~tii- 17~~e 12, alC,tgti NL 211012.
Phone:
Signatu
Date: ~ I I ~
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, __~~~ . P ~ Q.~G2-- , a Notary Public for the State of ~ D`f~. 1..~ C~~C~~~RCJ~.
County of ~ ,d, ~~,~p ~ , do hereby certify that ~ Q. ~n~T ~ LZ~, 0.f'1 C !"~
personally appeared before me this ~_day of _ ~~~ / ,and acknowledge the
due execution of the forgoing bioretention basin maintenance requirements. Witness my hand and official seal,
KELLY E. PIERCE
NOTARY PUBLIC
WAKE COUNTY, N.C.
My Commission Expires 4-18-2012.
SEAL
My commission expires ~ .r ~ 'b ~b~ ~,
SWU-108 4.07
Page 4 of 4

Bioretention Area 10
RECARGA 2.X
Date: 18-7u1-2007 12:56:47
Output File: Bioretention Area 10.txt
Number of time steps= 289
CPU elapsed time (s)= 0
INPUT TERMS
%Impervious= 88
Pervious CN= 74
Facility Area (sf)= 400
Trib. Area (AC)= 0.17
RATIOimp2rg= 16.2914
RATIOperv2rg= 2.22156
LAYER DEPTH (in) Ksat (in/hr) TEXTURE
Depression 12 --- ---
Root zone 36 4.14 1
Storage 4 10.00 1
Native --- 1.28 3
Init. Cond.: suction head (in)= -39
Max. underdrain flow (in/h r)= 0.010
underdrain diam (in)= 4.003
WATER BALANCE TERMS
volume(ac-ft) Depth (in) %of Inflow
Inflow 0.01 0.77 100.00
Runoff 0.00 0.00 0.00
Recharge 0.01 0.69 90.40
Evaporation 0.00 0.01 1.58
underdrain 0.00 0.22 29.33
Storage -0.00 -0.16 -21.32
Infiltrated 0.01
Precip. 1.00
Imp. Inflow 0.03 0.86 252.66
Perv.Inflow 0.00 0.02 0.93
Basin Stayon(in) -72.86
Total Stayon(in) 0.78
Mass Balance Checks:
vinsoil=input-roff-dvh
vinsoil (ac-ft)= 1.144803e-002
vinf difference (%)_ -0.0
vrechargl=inf-et-dsws
vrechar~l (ac-ft)= 1.034959e-002
vrech difference (%)_ -0.0
dvsoil=inf-rech-et
dvsoil= 9.174008e-004
dvsfce (ac-ft)= O.000OOOe+000
dvs2=input-roff-inf
dvs2 (ac-ft)= 1.440116e-018
PLANT SURVIVABILITY TERMS
total time ponded (h)= 1.5
max time ponded (h)= 1.5
total time Rz saturated (h)= 2.5
total time Rz at wilting ppoint (h)= 0.0
total time Tz saturated (h)= 2.5
max time Rz saturated (h)= 2.5
max time Rz at wilting ppoint (h)= 0.0
max time TZ saturated (h)= 2.5
near saturated times for simulation= 1
14.8 2.5
wilting point times for simulation= 0
0.0 0.0
ponded times for simulation= 1
14.0 1.5
overflow times for simulation= 0
0.0 0.0
Page 1

Permit No. ~-xP ~~~' U0~ I V
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original.
DWO stormwater Management Plan Review
A complete stormwater management plan submittal includes a stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name : C~ C~Cf ~~' P`i C~
Contact Person: ~(hrp~ C~ ~@(IQ
Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to: _ 1
(must match the DA # on the application & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsl).
Soils Report Summary
In-Situ Soil Type
In-Situ Soil Infiltration Rate
SHWT Elevation
Planting Soi] Texture
Planting Soi] Infiltration Rate
Basin Design Parameters
Drainage Area
Impervious Area
Design Storm
Design Volume
Inlet Velocity
Drawdown Time
Basin Elevations
Temporary Poo] Elevation
Planting Elevation
Bottom Elevation
Basin Dimensions
Basin Size
Basin Volume Provided
? ~ ~ ~~ in./hr. (the most restrictive soil layer)
j ~ '1` ft. (Seasonal High Water Table elevation)
_ oAI-~ SGn( ___ (must be a sandy loam, loamy sand, or loam texture)
2. ® in./hr.
~ S~ ~~ sq.ft. (on-site and off-site drainage to the basin)
Z ~~~ sq.ft. (on-site and off-site drainage to the basin)
I inch (1.5 inch event for SA waters, 1 inch event for others)
~0~3 c.f. (storage volume required)
~3~ 53 fps
.~S hours
.3(D~t D fmsl (elevation of the bypass/outlet structarre)
3~S.o fmsl (elevation of the ground surface bottom)
~~ U fmsl (elevation of the bottom of the plmzn~~lg media)
ft. x ~_ ft. _
140 y c.f.
< 10o sq, ft. (surface area nt basin bottom)
SWU-108 4.07
Page ] of 4

Basin Plantings
Number of plantings required ~©` ~ stems (400 sterns per acre of bioretention area. is required at a ~nini~nttrn)
Total No. of plantings provided 1 1 =Trees ~_ + Shrubs ~ (at least 1 tree for every 3 shrcrbs)
This system (check one) does does not incorporate the use of an under-drain.
(Under-drains are not allowed for those projects that drain to class SA waters.)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H :1000. These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met, attach written justification. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
'~ a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
b. No vertical sand bed is proposed.
~ ~ c. The bioretention area is at least 15 feet wide by 40 feet long.
~Ncr Ri/t~u~,zE© t tR N(.Q~n-t2gr~1A YYIANJ~aL EFFfrCTIV~ Juzy Z; 2007
d. A grass buffer strip and sheet flow conditions are provided at the inlet.
_~_ e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
~~" f. Ponding depth of 6-12" is provided.
g. In-situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
~ ~ h. An in-depth soils report is provided. (report should include soil types, boring log, map,
} suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
~~I i. The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
N F~ j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphonis content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) Include a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
_~_ k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
~~~ ]. A detailed planting plan, prepared by a qualified individual, is provided on the plans. This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, construction schedule, etc..
SWU-108 4.07
Page 2 of 4

~~ m. Type of mulch layer and depth is specified on the plans.
~~' n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
~~ o. Plan details for the inlet and outlet structures are provided. (including dimensions and
`~,,~ elevations)
~`~' f p. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
q. A benchmark is provided to determine the sediment accumulation in the basin area.
~_ r. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
~_ t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc. shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every significant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re-seed, re-plant, and re-mulch as necessary to maintain good vegetative and
mulch cover.
Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over-excavating. Over-excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shrubs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shn~bs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed
SWU-108 4.07
Pace 3 of 4

8. Soil testing shall be conducted annually to determine pH and any accumulation of toxins in the planting media
Lime or other alkaline substances shall be applied as recommended per the soil test and toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. All components of the bioretention area system shall be maintained in good working order.
10. If the Division determines that the system is failing, the system will immediately be repaired to original design
specifications. If the system cannot be repaired to perform its design function, other stormwater control devices
as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the ten maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or responsible party.
Print name: ~c~b2(`~ Pol~~co
Title: ~~25-iG~ent
Address: 8$O9 f~ibri4l~1' l7riye i2,a~e/Ig-~ NL 21(al'L
Phone:
Signatu
Date:
Note: The egally 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, ~1~ ~, . ~ 12~~G2-- , a Notary Public for the State of ~ t9`~~. l..ac'Gl~~R~J4.
County of ~ ~l ~,~,~,p , do hereby certify that ~. ~) Q. ~'T ~1j~, 0.t\ C t'7
personally appeared before me this ~_day of ~~ ~~~ ~ ,and acknowledge the
due execution of the forgoing bioretention basin maintenance requirements. Witness my hand and official seal,
KELLY E. PIERCE
NOTARY PUBLIC
WAKE COUNTY, N.C.
Commission Expires 4-18-2012.
SEAL
My commission expires ~ ~ ~ 'b~ ~b~
SWU-108 4.07
Page 4 of 4

Bioretention Area 11
RECARGA 2.X
Date: 18-~u1-2007 12:58:00
Output File: Bioretention Area 11.txt
Number of time steps= 289
CPU elapsed time (s)= 0
INPUT TERMS
%Impervious= 37
Pervious CN= 74
Facility Area (sf)= 1100
Trib. Area (AC)= 1.51
RATloimp2rg= 22.1245
RATIOperv2rg= 37.6715
LAYER DEPTH (in) Ksat (in/h r) TEXTURE
Depression 12 --- ---
Root zone 36 4.14 1
Storage 4 10.00 1
Native --- 1.28 3
Init. Cond.: suction head (in)= -39
Max. underdrain flow (in/hr)= 0.010
underdrain diam (in)= 4.003
WATER BALANCE TERMS
volume(ac-ft) Depth (in) %of Inflow
Inflow 0.04 0.34 100.00
Runoff 0.00 0.00 0.00
Recharge 0.03 0.26 76.07
Evaporation 0.00 0.00 1.14
underdrain 0.02 0.13 37.90
Storage -0.01 -0.05 -15.10
Infiltrated 0.04
Precip. 1.00
Imp. Inflow 0.04 0.86 89.69
Perv.Inflow 0.00 0.02 4.11
Basin Stayon(in) -30.07
Total stayon(in) 0.87
Mass Balance Checks:
vinsoil=input-roff-dvh
vinsoil (ac-ft)= 4.379588e-002
vinf difference (%)_ -0.0
vrechargl=inf-et-dsws
vrechar~l (ac-ft)= 3.331417e-002
vrech difference (%)_ -0.0
dvsoil=inf-rech-et
dvsoil= 9.983845e-003
dvsfce (ac-ft)= O.000OOOe+000
dvs2=input-roff-inf
dvs2 (ac-ft)= 1.152093e-017
PLANT SURVIVABILITY TERMS
total time ponded (h)= 2.8
max time ponded (h)= 2.8
total time Rz saturated (h)= 3.5
total time Rz at wilting ppoint (h)= 0.0
total time Tz saturated (h)= 3.8
max time Rz saturated (h)= 3.5
max time Rz at wilting ppoint (h)= 0.0
max time Tz saturated (h)= 3.8
near saturated times for simulation= 1
15.5 3.5
wilting point times for simulation= 0
0.0 0.0
ponded times for simulation= 1
15.0 2.8
overflow times for simulation= 0
0.0 0.0
Page 1

Permit No. ~XP U ~ ~ UU~ I
(to be provided by DWQ)
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
BIORETENTION BASIN SUPPLEMENT
This form may be photocopied for use as an original.
DWQ Stormwater Management Plan Review:
A complete Stormwater management plan submittal includes a stormwater management permit application, a
bioretention area supplement for each proposed system, sealed design calculations, a detailed soils report and 2 sets
of plans and specifications showing all stormwater conveyances and system details.
I. PROJECT INFORMATION
Project Name : Ce~tc,~ ~~~ C~
Contact Person: ~~r~~ Gt ~ e~l~
Phone Number:
For projects with multiple basins, specify which basin this worksheet applies to: L L~
(must match the DA # on the application & plans)
II. DESIGN INFORMATION Attach supporting calculations/documentation. Provide a written soils report
based on actual field investigations conducted by a qualified individual. The soils report should include
informational references to the County soils maps when available. All elevations shall be in feet mean sea level
(fmsl).
Soils Report Summary
In-Situ Soil Type
In-Situ Soil Infiltration Rate
SHWT Elevation
Planting Soil Texture
Planting Soil Infiltration Rate
j~ i~
~ (o ~ ~ in./hr. (the most restrictive soil layer)
~ l`~ '1' ft. (Seasonal High Water Table elevation)
S2. ~ D~c~nS ~r SRCCi(icGh~must be a sandy loam, loamy sand, or loam texture)
r--
' 2. u m./hr.
Basin Design Parameters
Drainage Area ~ ~ ~,~~~ sq.ft. (on-site and off-site drainage to the basin)
Impervious Area `3r ~~ Sq.ft. (on-si.te and off-site drainage to the basin)
Design Storm 1 inch (1.5 inch event for SA waters, 1 inch event for others)
Design Volume ~~~~ c.f. (storage volume required)
Inlet Velocity Co - ~ ~ fps
Drawdown Time ~7 S hours
Basin Elevations
Temporary Pool Elevation <~~ fmsl (elevation of the bypass/outlet stn~cture)
Planting Elevation ~~~ ?5 fmsl (elevation of the ground scuface bottom)
Bottom Elevation 37~~ ~5 fmsl (elevation of the bottom of the planting media)
Basin Dimensions _
Basin Size ~Z- ft. x ~ ft. _ (OZ~ sq. ft. (surface area at basin bottom)
Basin Volume Provided X00 c.f.
SWU-108 4.07
Page 1 of 4

Basin Plantings
Number of lantin s re wired J`~~~
p g q stems (400 stems per acre of bioretention area is required at a minimum)
Total No. of plantings provided (p =Trees .Z + Shrubs ~ (at least 1 tree for every 3 shrubs)
This system (check one) does does not incorporate the use of an under-drain.
(Under-drains are not allowed for those projects that drain to class SA waters.)
III. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the North Carolina Stormwater Best Management Practice
Manual and Administrative Code Section: 15A NCAC 2H .1000. These requirements are subject to change in
accordance with the manual and rules.
Initial in the space provided to indicate that the following design requirements have been met and supporting
documentation is attached. If a requirement has not been met, attach written justification. An incomplete
submittal package will result in a request for additional information and will substantially delay final review and
approval of the project.
Applicant's Initials
~, a. System is located 50 feet from class SA waters and 30 feet from other surface waters.
~ b. No vertical sand bed is proposed.
~ ~ c. The bioretention area is at least 15 feet wide by 40 feet long.
$~N~r R~t~Utrc6~ ~~FZ NCO~t~'kB~1P YYIANV~'L. ~Fl•frir~lV~ aULy Z.; 2CO~
d. A grass buffer strip and sheet flow conditions are provided at the inlet.
~ ~~ e. Seasonal High Water table depth is at least 2 feet below the planting elevation surface.
~~' f. Ponding depth of 6-12" is provided.
~~_ g. In-situ soils have a minimum hydraulic conductivity of 0.52 inches per hour.
~ ~ h. An in-depth soils report is provided. (report should include soil types, boring log, map,
suitability for placement of the control system, seasonal high water table, infiltration rate, etc.)
~~~ i. The planting soil has a minimum hydraulic conductivity of 0.52 inches per hour. The type and
placement specifications of the planting media are noted on the plans.
j. The planting soil meets minimum soil specifications per the latest version of the NCDENR
Stormwater Best Management Practices Manual, including a low phosphonis content to
promote phosphorus removal. (P-Index of 20 to 40 is optimal.) Include a soils test, indicating
P-Index, from a certified lab for those projects draining to Nutrient Sensitive Waters.
x~ k. System is designed to draw down the design storage volume to the proposed bottom elevation
under seasonal high water conditions within 24 hours. Draw down calculations are attached.
_.~_ 1. A detailed planting plan, prepared by a qualified individual, is provided on the plans. This plan
shall indicate a variety of suitable species, location, spacing, soil preparation, fertilizer
requirements, installation procedures, constriction schedule, etc..
SWU-108 4.07
Page 2 of 4

~~'Y _ m. Type of mulch layer and depth is specified on the plans.
n. Plan and section details for the bioretention area are provided. (including dimensions and
elevations)
N~ o. Plan details for the inlet and outlet structures are provided. (including dimensions and
elevations)
~~ p. All side slopes stabilized with vegetated cover are no steeper than 3:1 (H:V).
"' " .l__ q. A benchmark is provided to determine the sediment accumulation in the basin area.
r. Vegetated filter is provided for overflow and detail is shown on plans (Required minimum
length is 50 feet for SA waters, 30 feet for other waters).
~_ s. Runoff in excess of the design volume bypasses off-line systems (bypass detail provided).
H~ t. Plans ensure that the installed system will meet design specifications (constructed or restored)
upon initial operation once the project is complete and the entire drainage area is stabilized.
IV. BIORETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
Records of maintenance items to include dates, inspector's name, type of maintenance, etc. shall be kept and made
available to Division staff upon request. Maintenance activities shall be performed as follows:
1. Inspect the bioretention area system for soil and mulch erosion, vegetated cover, and general condition after
every significant runoff producing rainfall event and at least monthly. Remove trash as needed.
2. Repair eroded areas immediately, re-seed, re-plant, and re-mulch as necessary to maintain good vegetative and
mulch cover.
Remove accumulated sediment as needed to maintain good infiltration. When the filtering capacity diminishes
substantially (e.g., when water ponds on the surface for more than 24 hours), the top few inches of material must
be removed and replaced with fresh planting soil material. Regardless of infiltration capacity, accumulated
sediment in the bioretention basin shall be removed when the depth is reduced to 75% of the original design
depth. The system shall be restored to the original design depth without over-excavating. Over-excavating may
cause the required water table separation to be reduced and may compromise the ability of the system to perform
as designed. Removed sediment shall be disposed of in an appropriate manner and shall not be handled in a
manner that will adversely impact water quality (i.e. stockpiling near a stormwater treatment device or stream,
etc.).
4. Replace, or add additional mulch as needed. Removal of the old mulch layer before applying the new layer is
recommended every 2 to 3 years.
5. Prune trees and shrubs and remove debris on an annual basis. Grassed vegetation should not exceed 6 inches in
height.
6. Treat all diseased trees and shnibs whenever needed. Remove and replace all dead and diseased vegetation
considered beyond treatment every 6 months.
7. Replace support stakes yearly (in the spring). Replace deficient stakes or wires whenever needed
SWU-108 4.07
Pace 3 of 4

8. Soil testing shall be conducted annually to determine pH and any accumulation of toxins in the planting media.
Lime or other alkaline substances shall be applied as recommended per the soil test and toxic soils shall be
removed, disposed of properly and replaced with new planting media.
9. All components of the bioretention area system shall be maintained in good working order.
10. If the Division determines that the system is failing, the system will immediately be repaired to original design
specifications. If the system cannot be repaired to perform its design function, other stormwater control devices
as allowed by NCAC 2H .1000 must be designed, approved and constructed.
I acknowledge and agree by my signature below that I am responsible for the performance of the ten maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the
system or responsible party.
Print name: ~c~b2r+ Po~~~c-o
Title: }'~eSiG~e~t
Address: gS09 i~lb~4hfi 17r~ve 12.aI~I~h NC, 21(0)2
Phone:
Signatu
Date:
Note: The egally 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, ~~ .. P ~ 2C~e_- 2.. , a Notary Public for the State of ~ [~~~~,. 1.., ac G,~~ RCJ~-
County of ~ Jl ~~~,~ ~ , do hereby certify that b C"^~ \" ~~~ eu~ [~ t7
personally appeared before me this ~_day of ~~~ ,and acknowledge the
due execution of the forgoing bioretention basin maintenance requirements. Witness my hand and official seal,
KELLY E. PIERCE
NOTARY PUBLIC
W,~KE COUNTY, N,C.
Commission Expires 4-18-212.
SEAL
My commission expires ~-.~ '~ ~ ~~ ~b1 ~,
SWU-108 4.07
Page 4 of 4

Bioretention Area 12
RECARGA 2.X
Date: 18-~u1-2007 13:07:20
Output File: Bioretention Area 12.txt
Number of time steps= 289
CPU elapsed time (s)= 0
INPUT TERMS
%Impervious= 37
Pervious CN= 74
Facility Area (sf)= 625
Trib. Area (AC)= 1.51
RATloimp2rg= 38.9392
RATIOperv2rg= 66.3018
LAYER DEPTH (in) Ksat (in/hr) TEXTURE
Depression 12 --- ---
Root zone 36 4.14 1
storage 4 10.00 1
Native --- 1.28 3
Init. Cond.: suction head (in)= -39
Max. underdrain flow (in/h r)= 0.006
underdrain diam (in)= 3.017
WATER BALANCE TERMS
volume(ac-ft) Depth (in) %of Inflow
Inflow 0.04 0.34 100.00
Runoff 0.00 0.01 2.67
Recharge 0.02 0.19 55.60
Evaporation 0.00 0.00 0.66
underdrain 0.02 0.17 49.69
Storage -0.00 -0.03 -8.62
Infiltrated 0.04
Precip. 1.00
Imp. Inflow 0.07 0.86 160.73
Perv.Inflow 0.00 0.02 7.36
Basin stayon(in) -30.07
Total stayon(in) 0.82
Mass Balance checks:
vinsoil=input-toff-dvh
vinsoil (ac-ft)= 4.186294e-002
vinf difference (%)_ -0.0
vrechargl=inf-et-dsws
vrechargl (ac-ft)= 2.391516e-002
vrech difference (%)_ -0.0
dvsoil=inf-tech-et
dvsoil= 1.766490e-002
dvsfce (ac-ft)= O.000OOOe+000
dvs2=input-toff-inf
dvs2 (ac-ft)= 1.152093e-017
PLANT SURVIVABILITY TERMS
total time ponded (h)= 6.8
max time ponded (h)= 6.8
total time Rz saturated (h)= 7.0
total time Rz at wilting point (h)= 0.0
total time Tz saturated (h)= 7.3
max time Rz saturated (h)= 7.0
max time Rz at wilting point (h)= 0.0
max time Tz saturated (h)= 7.3
near saturated times for .simulation= 1
18.8 7.0
wilting point times for simulation= 0
0.0 0.0
ponded times for simulation= 1
18.5 6.8
overflow times for simulation= 0
0.0 0.0
Page 1

Table of Contents
~. x,p o~ - co 8 ~ ~ 2
bioretenion_volumes,gpw
Hydraflow Hydrographs by Intelisolve
Saturday, Jul 7 2007, 1:41 PM
Hydrograph Return Period Recap ................................................................... 1
1 -Year
Summary Report ..............................................................................................................
Hydrograph Reports ........................................................................................................
Hydrograph No. 1, SCS Runoff, BIORETENTION 1 ......................................................
Hydrograph No. 2, SCS Runoff, BIORETENTION 2 ................................
......................
Hydrograph No. 3, SCS Runoff, BIORETENTION 3 ......................................................
Hydrograph No. 4, SCS Runoff, BIORETENTION 4 ......................................................
Hydrograph No. 5, SCS Runoff, BIORETENTION 5 ......................................................
Hydrograph No. 6, SCS Runoff, BIORETENTION 6 .....................................................
Hydrograph No. 7, SCS Runoff, BIORETENTION 7 ......................................................
Hydrograph No. 8, SCS Runoff, BIORETENTION 8 ....................................................
Hydrograph No. 9, SCS Runoff, BIORETENTION 9 ....................................................
Hydrograph No. 10, SCS Runoff, BIORETENTION 10 ................................................
Hydrograph No. 11, SCS Runoff, BIORETENTION 11 ................................................
Hydrograph No. 12, SCS Runoff, BIORETENTION 12 ................................................
Hydrograph No. 13, SCS Runoff, BIORETENTION 13 ................................................
2
3
3
4
5
6
7
.8
9
10
11
12
13
14
15

Hydrograph Return Period Recap
Hyd. Hydrograph Inflow Peak Outflow (cfs) Hydrograph
N
o. type Hyd(s) description
(origin) 1-Yr 2-Yr 3-Yr 5-Yr 10-Yr 25-Yr 50-Yr 100-Yr
1 SCS Runoff ------- 0.317 ------- ------- ------- ------- ------- ------- ------- BIORETENTION 1
2 SCS Runoff ------- 0.631 ------- ------- ------- ------- ------- ------- ------- BIORETENTION 2
3 SCS Runoff ------- 0.165 ------- ------- ------- ------ ------- ------- ------- BIORETENTION 3
4 SCS Runoff ------- 0.500 ------- ------- ------- ------ ------- ------- ------- BIORETENTION 4
5 SCS Runoff ------- 0.417 ------- ------- ------- ------ ------ ------- ------- BIORETENTION 5
6 SCS Runoff ------- 0.249 ------- ------- ------- ------- ------- ------- ------- BIORETENTION 6
7 SCS Runoff ------- 0.456 ------- ------- ------- ------- ------- ------- ------- BIORETENTION 7
8 SCS Runoff ------- 0.544 ------- ------- ------- ------- -____-_ _______ _______ BIORETENTION 8
9 SCS Runoff ------- 0.239 ------- ------- ------- ------- ------- ------- ------- BIORETENTION 9
10 SCS Runoff ------- 0.160 ------- ------ ------- ------- ------- ------- ------ BIORETENTION 10
11 SCS Runoff ------- 0.342 ------- ------- ------- ------- ------- ------- ------ BIORETENTION 11
12
'I SCS Runoff ------- 0.170 ------- ------- ------- ------ ------_ -____-- -____-- BIORETENTION 12
Proj. file: bioretenion_volumes.gpw Saturday, Jul 14 2007
Hydraflow Hydrographs by Intelisolve

Hydrograph Summary Report
Hyd.
No, Hydrograp
type
(origin) Peak
flow
(cfs) Time
interval
(min) Time to
peak
(min) Volume

(cult) Inflow
hyd(s) Maximum
elevation
(ft) Maximum
storage
(tuft) Hydrograph
description
1 SCS Runoff 0.317 3 720 787 ---- ------ ------ BIORETENTION 1
2 SCS Runoff 0.631 3 720 1,489 ---- ------ ------ BIORETENTION 2
3 SCS Runoff 0.165 3 720 396 ---- ------ ------ BIORETENTION 3
4 SCS Runoff 0.500 3 720 1,164 ---- ------ ------ BIORETENTION 4
5 SCS Runoff 0.417 3 720 970 ---- ------ ------ BIORETENTION 5
6 SCS Runoff 0.249 3 717 592 ---- ------ ------ BIORETENTION 6
7 SCS Runoff 0.456 3 717 1,041 ---- ------ ------ BIORETENTION 7
8 SCS Runoff 0.544 3 720 1,283 ---- ------ ------ BIORETENTION 8
9 SCS Runoff 0.239 3 720 651 ---- ------ ------ BIORETENTION 9
10 SCS Runoff 0.160 3 717 365 ---- ------ ----- BIORETENTION 10
11 SCS Runoff 0.342 3 723 1,083 ---- ------ ------ BIORETENTION 11
12 SCS Runoff 0.170 3 723 617 ---- ------ ------ BIORETENTION 12
bioretenion_volumes.gpw Return Period: 1 Year Saturday, Jul 14 2007
Hvdraflow Hvdroaraohs by Intalicnlva

Hydrograph Plot
3
Hydraflow Hydrographs by lntelisolve
Hyd. No. 1
BIORETENTION 1
Hydrograph type = SCS Runoff
Storm frequency = 1 yrs
Drainage area = 1.170 ac
Basin Slope = 0.0
Tc method =USER
Total precip. = 1.00 in
Storm duration = 24 hrs
Saturday, Jul 7 2007, 1:41 PM
Peak discharge = 0.317 cfs
Time interval = 3 min
Curve number = 86
Hydraulic length = 0 ft
Time of conc. (Tc) = 5.00 min
Distribution =Type II
Shape factor = 484
Hydrograph Volume = 787 cuff
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0 3
- -Hyd No. 1
BIORETENTION 1
Hyd. No. 1 -- 1 Yr
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
25
Time (hrs)
5 8 10 13 15 18 20 23

Hydrograph Plot
Hydraflow Hydrographs by Intelisolve
Hyd. No. 2
BIORETENTION 2
Hydrograph type = SCS Runoff
Storm frequency = 1 yrs
Drainage area = 1.730 ac
Basin Slope = 0.0
Tc method =USER
Total precip. = 1.00 in
Storm duration = 24 hrs
Saturday, Jul 14 2007, 11:38 AM
Peak discharge = 0.631 cfs
Time interval = 3 min
Curve number = 88
Hydraulic length = 0 ft
Time of conc. (Tc) = 5.00 min
Distribution =Type II
Shape factor = 484
Hydrograph Volume = 1,489 cult
Q (cfs)
Q (cfs)
1.00
0
90 1.00
. 0.90
0.80
70 0.80
7
0.
0
60 0.
0
0
60
.
0
50 .
.
40
0 0.50
40
0
.
0 P` .
0
0.3

0
20 i
a
. -
.30
0
20
.

0
10 i
i .

10
0
.

0 00 -

. -

_._ .

..

... 3

.. _..
`~ .
i

..-.. ~

L~..._.~.,

..... _,.~..n~~ _

._ .. _... _... .

_ 0 00
0 3
.... Hyd No. 2
BIORETENTION 2
Hyd. No. 2 -- 1 Yr
5 8 10 13 15 18 20 23
25
Time (hrs)

Hydrograph Plot
5
Hydraflow Hydrographs by Intelisolve
Hyd. No. 3
BIORETENTION 3
Hydrograph type = SCS Runoff
Storm frequency = 1 yrs
Drainage area = 0.520 ac
Basin Slope = 0.0
Tc method =USER
Total precip. = 1.00 in
Storm duration = 24 hrs
Saturday, Jul 7 2007, 1:41 PM
Peak discharge = 0.165 cfs
Time interval = 3 min
Curve number = 87
Hydraulic length = 0 ft
Time of conc. (Tc) = 5.00 min
Distribution =Type II
Shape factor = 484
Hydrograph Volume = 396 cult
BIORETENTION 3
Q (cfs) Hyd. No. 3 -- 1 Yr
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
f
0.10 -- -
0.05
~`~<
_1 -_.~...~.: _..µ,.....~
...n,., M.,~ ._..~_... ~~.....~M , ..,r.. _..
0 3 5 8 10 13 15 18 20 23
- Hyd No. 3
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
........._ 0.00
25
Time (hrs)

Hydrograph Plot
6
Hydraflow Hydrographs by Intelisolve
Hyd. No. 4
BIORETENTION 4
Hydrograph type = SCS Runoff
Storm frequency = 1 yrs
Drainage area = 1.200 ac
Basin Slope = 0.0
Tc method =USER
Total precip. = 1.00 in
Storm duration = 24 hrs
Saturday, Jul 7 2007, 1:41 PM
Peak discharge = 0.500 cfs
Time interval = 3 min
Curve number = 89
Hydraulic length = 0 ft
Time of conc. (Tc) = 5.00 min
Distribution =Type II
Shape factor = 484
Hydrograph Volume = 1,164 cult
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
0 3
.. Hyd No. 4
BIORETENTION 4
Hyd. No. 4 -- 1 Yr
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
25
Time (hrs)
5 8 10 13 15 18 20 23

Hydrograph Plot '
Hydraflow Hydrographs by Intelisolve Saturday, Jul 7 2007, 1:41 PM
Hyd. No. 5
BIORETENTION 5
Hydrograph type = SCS Runoff Peak discharge = 0.417 cfs
Storm frequency = 1 yrs Time interval = 3 min
Drainage area = 1.000 ac Curve number = 89
Basin Slope = 0.0 % Hydraulic length = 0 ft
Tc method =USER Time of conc. (Tc) = 5.00 min
Total precip. = 1.00 in Distribution =Type II
Storm duration = 24 hrs Shape factor = 484
Hydrograph Volume = 970 tuft
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0 3
- Hyd No. 5
BIORETENTION 5
Hyd. No. 5 -- 1 Yr
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
25
Time (hrs)
5 8 10 13 15 18 20 23

Hydrograph Plot
8
Hydraflow Hydrographs by Intelisolve
Hyd. No. 6
BIORETENTION 6
Hydrograph type = SCS Runoff
Storm frequency = 1 yrs
Drainage area = 0.220 ac
Basin Slope = 0.0
Tc method =USER
Total precip. = 1.00 in
Storm duration = 24 hrs
Saturday, Jul 7 2007, 1:41 PM
Peak discharge = 0.249 cfs
Time interval = 3 min
Curve number = 98
Hydraulic length = 0 ft
Time of conc. (Tc) = 5.00 min
Distribution =Type II
Shape factor = 484
Hydrograph Volume = 592 tuft
BIORETENTION 6
Q (cfs) Hyd. No. 6 -- 1 Yr Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0 00
0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0
Hyd No. 6 Time (hrs)

Hydrograph Plot
Hydraflow Hydrographs by Intelisolve
Hyd. No. 7
BIORETENTION 7
Hydrograph type = SCS Runoff
Storm frequency = 1 yrs
Drainage area = 0.760 ac
Basin Slope = 0.0
Tc method =USER
Total precip. = 1.00 in
Storm duration = 24 hrs
9
Saturday, Jul 7 2007, 1:41 PM
Peak discharge = 0.456 cfs
Time interval = 3 min
Curve number = 92
Hydraulic length = 0 ft
Time of conc. (Tc) = 5.00 min
Distribution =Type II
Shape factor = 484
Hydrograph Volume = 1,041 tuft
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0 3
Hyd No. 7
BIORETENTION 7
Hyd. No. 7 -- 1 Yr
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
25
Time (hrs)
5 8 10 13 15 18 20 23

Hydrograph Plot
10
Hydraflow Hydrographs by Intelisolve Saturday, Jul 7 2007, 1:41 PM
Hyd. No. 8
BIORETENTION 8
Hydrograph type = SCS Runoff Peak discharge = 0.544 cfs
Storm frequency = 1 yrs Time interval = 3 min
Drainage area = 1.490 ac Curve number = 88
Basin Slope = 0.0 % Hydraulic length = 0 ft
Tc method =USER Time of conc. (Tc) = 5.00 min
Total precip. = 1.00 in Distribution =Type II
Storm duration = 24 hrs Shape factor = 484
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
0 3
Hyd No. 8
BIORETENTION 8
Hyd. No. 8 -- 1 Yr
Hydrograph Volume = 1,283 cult
Q (cfs)
1.00
0.90
0.80
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
25
Time (hrs)
5 8 10 13 15 18 20 23

Hydrograph Plot
11
Hydraflow Hydrographs by Intelisolve
Hyd. No. 9
BIORETENTION 9
Hydrograph type = SCS Runoff
Storm frequency = 1 yrs
Drainage area = 1.260 ac
Basin Slope = 0.0
Tc method =USER
Total precip. = 1.00 in
Storm duration = 24 hrs
Saturday, Jul 7 2007, 1:41 PM
Peak discharge = 0.239 cfs
Time interval = 3 min
Curve number = 84
Hydraulic length = 0 ft
Time of conc. (Tc) = 5.00 min
Distribution =Type II
Shape factor = 484
Hydrograph Volume = 651 cult
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0 3
- Hyd No. 9
BIORETENTION 9
Hyd. No. 9 -- 1 Yr
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
25
Time (hrs)
5 8 10 13 15 18 20 23

Hydrograph Plot
12
Hydraflow Hydrographs by Intelisolve Saturday, Jul 7 2007, 1:41 PM
Hyd. No. 10
BIORETENTION 10
Hydrograph type = SCS Runoff Peak discharge = 0.160 cfs
Storm frequency = 1 yrs Time interval = 3 min
Drainage area = 0.170 ac Curve number = 96
Basin Slope = 0.0 % Hydraulic length = 0 ft
Tc method = USER Time of conc. (Tc) = 5.00 min
Total precip. = 1.00 in Distribution =Type II
Storm duration = 24 hrs Shape factor = 484
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0 3
- Hyd No. 10
BIORETENTION 10
Hyd. No. 10 -- 1 Yr
Hydrograph Volume = 365 cult
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
25
Time (hrs)
5 8 10 13 15 18 20 23

Hydrograph Plot
13
Hydraflow Hydrographs by Intelisolve Saturday, Jul 7 2007, 1:41 PM
Hyd. No. 11
BIORETENTION 11
Hydrograph type = SCS Runoff Peak discharge = 0.342 cfs
Storm frequency = 1 yrs Time interval = 3 min
Drainage area = 1.510 ac Curve number = 86
Basin Slope = 0.0 % Hydraulic length = 0 ft
Tc method = USER Time of conc. (Tc) = 13.70 min
Total precip. = 1.00 in Distribution =Type II
Storm duration = 24 hrs Shape factor = 484
Hydrograph Volume = 1,083 cult
Q (cfs)
Q (cfs)
0.50 0.50
0
45
. 0.45
40
0
. 0.40
0
35
. 0.35
0
30
. ~ 0.30
0.25

E.
0.25

0
20 fl.
~
. . 0.20
i~
i
~
i ~
0.15 ~ 0.15
~I
z
10
0 -
. ~
Is 0.10

05
0 3
i

`'
.
T.. .
.. 0.05

i .., ...... e..._....
...
._.. ..,.....,~.
._......._ .....,.
.
0 3
- Hyd No. 11
BIORETENTION 11
Hyd. No. 11 -- 1 Yr
5 8 10 13 15 18 20 23
25
Time (hrs)

Hydrograph Plot
14
Hydraflow Hydrographs by Intelisolve Saturday, Jul 7 2007, 1:41 PM
Hyd. No. 12
BIORETENTION 12
Hydrograph type = SCS Runoff Peak discharge = 0.170 cfs
Storm frequency = 1 yrs Time interval = 3 min
Drainage area = 1.120 ac Curve number = 84
Basin Slope = 0.0 % Hydraulic length = 0 ft
Tc method = USER Time of conc. (Tc) = 10.60 min
Total precip. = 1.00 in Distribution =Type II
Storm duration = 24 hrs Shape factor = 484
Hydrograph Volume = 617 cult
Q (cfs)
Q (cfs)
0.50
0.50
0
45
. 0.45
0
40
. 0.40
0
35
. 0.35
30
0
. 0.30
0
25
. 0.25
0
20
. 0.20
0
15
. 0.15
0
10 -
.
4 0.10
{ 4
0
05 -
.
f
,:... 0.05

0.00 -

... ......... .

.....

,, ,..
1
.,,... , ,.,..
..... .......
.......... .. ...
.. .... ~.. ..._-W
,,.. .,
0
BIORETENTION 12
Hyd. No. 12 -- 1 Yr
3 5 8 10 13 15 18 20 23
Hyd No. 12
25
Time (hrs)

Hydrograph Plot
15
Hydraflow Hydrographs by Intelisolve
Hyd. No. 13
BIORETENTION 13
Hydrograph type = SCS Runoff
Storm frequency = 1 yrs
Drainage area = 0.210 ac
Basin Slope = 0.0
Tc method = USER
Total precip. = 1.00 in
Storm duration = 24 hrs
Saturday, Jul 7 2007, 1:41 PM
Peak discharge = 0.112 cfs
Time interval = 3 min
Curve number = 91
Hydraulic length = 0 ft
Time of conc. (Tc) = 5.00 min
Distribution =Type II
Shape factor = 484
Hydrograph Volume = 257 cult
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0 3
___ .., Hyd No. 13
BIORETENTION 13
Hyd. No. 13 -- 1 Yr
Q (cfs)
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
25
Time (hrs)
5 8 10 13 15 18 20 23

~ BIORETENTION
AREA TOTAL AREA
(ac) IMP
(ac) GRASS
(ac)
CN

1 1.17 0.40 0.77 86
2 1.73 0.78 0.95 88
3 0.52 0.21 0.31 87
4 1.20 0.60 0.60 89
5 1.00 0.50 0.50 89
6 0.22 0.22 0.00 98
7 0.76 0.52 0.24 92
8 1.49 0.74 0.75 88
9 1.26 0.59 0.67 84
10 0.17 0.15 0.02 96
11 1.51 0.56 0.95 ~ 86
12 1.12 0.31 0.81 84

WAKE COL;N7'Y, NORTI3. CAROLINA
of th.e soils---Continued
Classification----Continued
t: reified
S~1
~ ~4H, CL, SC
CL, SC
' liL
C`•L, \1H
CL
~: b1L
CL, \iH
i~1 H
i
SAT
tiNi, SC
ti11
S 1\'1
CL, S1~I
' cI.
S\i
~4H, CH
1~1 L
SD4
S \i, (~ ~1
il:iH, CL
S1I
ML
I ;\IL, CL
\IL
I
b•[
SC, :SDi, CL
S'~I, SC
' S M
SC
Sit
SC', ~,\i
G ~'I
SP, Stiff-SY
S i4'I
SCI
SIt'I, ~iL
SC, CL
stiff
511, \iL
MH, CL, SC
SC, Si`i
Si\1, CL
S 1V~1
AASHO
A-2, A-4
A-7
:1-6, A-2
A-4
A-6, A-7
A-7
A-4
A-7
A-7
A-'2
a-1
A-1
4-2, A-4
A-6, A-2
A-7
i3-2, A- 4
A-7
A-4
,4-2, ,4-4
A-2
A-7
A-'2, A-4
A-4
A-6
A-4
A-2, A-4
A-(i, A -4, A-2
A-2, A-4
A- 2
A- 6, A-4, A--2
A-2
A-2, A--4
A-'~
A-3, A-2
A-'?, A--4
A-1, A-2
A-4
A-'l, A-4, A-6
A-2
A-2, A--4
A-7, A--6
A-4, A-2
A-2, A-6
A-2
Percentage
passing sieve i Available
No. 200 ! Permeability ; water
(0.074 mm.) ~ j cltpacity
30-40
45-60
20-55
65-90
85-95
80-90
50-80
515-00
80-90
10-35
10-25
10-35
', tT4f ~l P.Y pfT liiC~4 OI
]TLC~lP,3 pfT h071.'T 9b1d
2. 0-6.3 ~ 0. 11
<0. 2 . 14
0. 2--0. 63 . 14
2. 0-0. 3 . 13
0. 63 -2. 0 . 10 '
0. 63-2. 0 i . 14 I
2. 0-6. 3 . 13 '~
0. 63-2. (1 ; . 13
0.63-~.0 '
I 13
"> 6. 3 ~I . 03 ';
2. 0-6. 3 ~ 10 I
2. 0-6. 3 . 10
30-40
25-60
70-~0
25-40
55-85
70-90
30-40
1'2-35
70-90
30-40
65-90
80-90
6+5-00
30-40
20-56
30-40
10-3 ~ i
25-5.5
10-3:i
30-40
10-35
2. 0-6. 3
0. 63-2. 0
0. 63-2. 0
'> 6. 3
0. 63-2. 0
0. 03-2. 0
2. 0-6. 3
:> 6. 3
0. 63-2. 0
0. 63-2. 0
2. 0-6. 3
0. 63--2. 0
0. 60-2. 0
2. 0-6. 3
0. 63-2. 0
0. 63-2. 0
2. 0-6. 3
0. 63-2. 0
0. 63-2 0
2. 0-6. 3
2. 0-6. 3
1~ ~
14
15
] 1 '.
13 I
11
00 '
i
12 I
13 i
13
13 ';
13 ':
13 I
08
15 ~~
1v
08
15
12 '
15
08
Shrink-swell
Reaction ~ potential
pH
5. G-6. 0 I Lotv.
4. ;i-5. 5 High.
5. 1--ii. 5 High.
i
5. 1-5. 5 ~ Loty.
5. 1-:i. 5 ' illodcrate.
5. 6-Fi. 0 ~'Ioderate.
,;
5. 6--ti. 0 I Low. ,
5. 6-6. 0 ;Moderate.
5. 6-6. 0 '~, A~Ioderrl.te.
5. I--5. 5 ~ Low.
5. I-5.5 Low.
5. 1-5. 5 Low.
7. 6-6. 0 ' Low.
5. 1-5. 5 ~ Low.
6. 1-6. 5 ~ Dlodenx(.c.
5. 1-5. 5 Loev.
5. 1-5. 5 Moderate.
5. 1-5.5 Low.
Ei. 1-6. 5 ~, Low.
5. 6-li. 0
5. 1-5. 5
5. I-5. 5
5. 6-6. 0
5. 1-5. 5
5. 1-5. 5
Low.
7oderate
LOW.
Loti•.
\ioderate.
\ioderate.
:>. 1-5. 5
5. 1-5. 5
5. 6-6. 0
5.G6.0
.`>. 1....5. 5
5. 1-5. 5
5. 6-6. 0
4. 5-5. 0
Low.
Low.
Low.
Lott'.
Low.
Low.
' Lott'.
i Low.
93
0-15 ~ >0. 3 j . 05 5. 6-6. 0 ;Low.
30-40 I 2. O-6. 3 . 12 ~
~ 5. 1-5. 5 '', Low.
~
15-30 '>6.3 . 08 Low.
5. 1-5. 5
40-55 ~ 0. 63-2. 0 i . 12 5. 6-0. 0 !Low.
3(}-55 ' 0. 63-2. 0 . 14 4. 5-5. 5 ' Lott'.
15-30 0. 63-2. 0 . 1'2 i 4. 5-5. 0 I,ow.
25-60 ! 0.63-2. 0 . 13 6. 1 u. 5 Low.
45-95 ~~0. 2 I ]3 ! 5. 1 .~. 5 'High to moderate.
30-40 ~ 0. 2 ~ L3 '' 6. 1--6. 5 Low.
0-15 ~ >6. 3 . 05 ' 6. i-6. 5 ', Low.
30-55 ' 0. Ei3-2. 0 . 14 ~ 5. 1-5. 5 ': Low.
15-30 ~ 2. O-6. 3 ' . 10 5. fi-6. 0 '', Low.

r. M
92
SOIL SURVEY
TABLE 5.--Estima-tec(, prop~rtus
Soil seriea :Lnd mtLp symbol
Helena (HeB, HeB2, HeC, HeC2, HeD)__-.____.___-.
Herndon (HrB, HrB2, HrC, HrC2, HrD2, HrE)___.._
Lloyd (Ld62, LdC2, LdD2)__-..------------------
Louisburg (Lo B, LoC, Lo D, Lw B, Lw 82, LwC, I
LwC2).
(For properties of Wedowee soils in Lw B, Lw B2,
LwC, and LwC2, refer to the Wedowee '
series.)
Lynchburg (LY)--------------------------------
Madison (Md62, MdC2, MdD2, MdE2).-__________
~lantachie (Me)----------------------------._...
bltlyoclan:
(MMB,B2 fIB~CMfnC$C~~)C2, Mf02, MfE, MgB,
(MyB, MyB2, MyC, MyC2., MyC)_____-__---
Norfolk (NoA, NoB, NoB2_, NoC, NoC2)_______._.
Orangeburg (OrB, OrB2, OrC2)_..._...____ ____-.-_..
Pinkston (PkC, PkF)----------.----------------..
Plummer (Ps)------------------------._ -- --
Rains (Ra).---------- ------------ - ---------..
Roanoke (Ro) --------------- - -- - -- -------
Troup (Mapped only in a complex with WtLgram
soils) .
Footnote at end of table.
I Depth to Depth
Depth to i seasonally from
bedrock i high i surface
l
i
water ! ca
(typ
table I profile)
Ftt6 I Fect
i
5-15-•- ~ 10 -r
I~
5--15 -{- ; 10 -}-'~
I
2-4 ~ 10 ~-
20-}-~ 1%
i
I
5-15 -*- I 10 -i-
5-15+i 2
4-15 ~-
3 -t-
20-}-
20 ~-
2-3
20;-
'l0 ~-
5-15 -{-
20 t-
Classification
Dominant iiSDA texture,

Inchcs
0-8 I

v loam_-- -- -- ---.. .- -----
SaLnd
8-36 ,
Sandy clay_ -- --- _ --
~
3(i-3~ ,
Sandy clay loam- . _ _ _ _ . _ _ _ .- _ _ _ .. _ .. -

(i-40 Silty clay Io:Lm._ ._ -..--._ _ -.
40-45 Silty clay loam------.----._.._--_-.- _--
,
0-9 I Loam---------'------- --------- ---_._'
4)--38 Clay to clay loam----.------------------'
38-50 Silty clay loam--------- --- - ---- 1
0-8 Lo:Lmy sa.nd--__...-------- .----- _.-.-
S-12 Co:Irsesandyloam_.--.-------_.------ --
'
12-3G '
I Loarny sand.---__... ------...____. .-_-._..__
0-13 Sandy loam.---------- ---'---- --------
13-~5 S:uldy clay loam to sandy loam_ _ _ _ - _ _ _ _ _ _ _
65-72 C1;Ly------------- ----'---------__'
----
0-0 I Sandy loam--------------- ------
------
6-32 Claytoam-------------

32-48
Silt loam______________
-------- - --- -~
(}-45 ,Sandy loam-__-_. _
10-f-' 0-7 ' Sandy loam or gravelly sandy lonm _. _ _ _ _ _ _
, 7-40 i Clay to clay loam-----------------------~
40-48 I Sandy loam--------------'-----.. ;
_----
lO~II 0-9 '. Silt loam- ------- ----- ------ --- - -':
9-24 Silly clay loam--------------------------',
~34-.i0 ! ~11t10an1___.._____________.-_____________
10 {-; 0--1v ~ LOamya:LIld__..___.___.._____.___.._..-_
15-63 'Sandy clay loam--------------------- -
'
ti5-72 ' Sandy I°a11L-------- ----- - ----- _
10-I' 0-12 Lonmys,Lnd.. _ --'--_ _.----
12~-G6 :Sandy clay barn tosandy loam- _ _
I G6-72 Loamy s;ind____-_-.. __ ___-.-- -- --,
10 +. 1, 4-25 ~ ~cLndy loam_------ -- ---- ---------- !.
25~-30 i (;ra.velly saz;dy lo:Lm__..._..._..-----.-.. ...---,--I
36 I Hard rock.
p ~ 0-ti0 Sand_---- ---- .._ ._ .----- ------ _-- _
-
~ 50-(i0 I,
! fiandy> loam----------__-.__------ -----
60-72 i Loamyaanci_.----.---.__...---.-.--------
0 0-8 !'. F'inesa,ndyloam---------- - -------- -':
8-65 ~ Sandy clay loam__.-_-- ---.----------
fi5-72 i LORnly Satld _ _ - _ - _ _. . - - - - - -
0 ~ 0-11 'Fine sandy loam------------- -----.-- '
i 11-38 '; Clay t.o sandy ciay loam..-._________________
i
38--45
:Sandy loam..-_.----------------- -----'
10-I- 0--49 -._..--
i Sa.nd-----______ _- -----....--

49-83
Sandy loam to sandy play barn _ _ .- .- _ _ _
----
83-88 ': Lo:rmys:Lnd--------.__ .---.._.___ _-.-------I

•~ r
1~fti M 7 ~~
/'~ {.~
~; 1'r-
~ @'X5~'84~~9n1ytt~FrE~>r
R~iclrnc;t ~. kiasley, C~c7vor~nrr
1~lillatn i"r. Ross lr., Secretar'y
l~itrrth C:ar~rli:!a C)eparttxrrrd, of I=nvv2nvnent and Natural Resr:~urces
Coleert I-T. Sullinti, [~trector
C)ivision c,f ~'alc;T Quality
July l 1, 2007
D+WQ ~~P ;~x0. ®7-fl~$14Z
Wake Cozmty
C:~ItTil!aiF.D.~ fVlf~><7:1: RET'Ct'ttN R:1r:~JE;][4'T RE()1/TES';t"ED
Mr, kobert E'alaneo
HgO~ All~right.l2.uad
Raleigh, NC 27C-r l
StYbjec# Presperty: Cedar 1'..i.dgi Subdivsitrn, Ro:iesville, NC'
... ..,.... ., .... Barns Cref~k l.fl'30~02;27=2C~, C:..NS.W~..
R~Q~7~:S7:' ~'(7R ~X+t3~P J1+~.rOR1VIA-"I'CO?'+l-~:X~'RESS ~ttL'~']'~f~'PR~C.-G~tAi17
l?car ~Ir. Palanco:
C)n lizly 9, 2fl07, th4 Express Review Program of the Division of VVatr~r Quality (TJWQ) received your
appli.ca.tion for the above referenced protect, `t'he T3WQ has de~termixzed that your application will require
additianai inforrnatian.
Pla~ase presvicle the ft~llo~vintg inforzxratiot>t so tbat eve txeay couttnue to l."evit=w yt~aar grt~,~ee# and prevent
denial of your application as required ley .i SA NC.AG 2}:-f .f}506:
l , I~WQr sent a request far a.dd.itianal i.nfarrnatian. an 3une 4, 100'1, Item l regard.in.g the issue of
the geatuchnieal subsurface exploration in regard to use of a Ccsn-span bottomless arch
culvert, was. not addressed. in the laly 9, 2007 submittal package.
2. DWQ has cancerrzs regarding cumulative impacts. Please explain the stubbed au't roads----
Gcnovesa Drive, Mont;Sirrat Dz•ive, and Marbella Drive.
3. Yau have indicated a total of 220 linear feet of permanent stream impacts and ld0 linear feet
of texnparazy stY-eam impacts an die cover letter; a fatal of 941inear feet of impacts on page 4
of the P(."N; 96 linear feet of impacts on page S of the PC.1`I (tor the same ixrtpact site); and
.. „S~heefi;ti~of 35'iden'tifies 2S0 linear fief of permanen#: stream impacts and 20 feet of temparaz-v
stream impacts. The May 15, 2007 submittal package indicatedl.4~ lixzear feet of stz-eam
impacts. Please explain the discrepancies.
4. Your I't;N application indicates a request far a Water Quality S~`ertification and Buffer
Authori~atian for Phase ll:; the construction plans ind.icatc Phases 111-N. Please clarify th.e
praject scope and verify with the USAC;E representative.
5. Please inrludt, all praposed riparian buffer impacts (w-hether requiring mitigation or nat)
within ~~ectian .X of the l~'C'2`1.
6. The Zone '~ buffer impacts within. the table (depicted can Sheet ( of 35) daes not match with
thk individual impacts depicted an thc. canstl~zzctian. sh.€:ets.
7.. 'Y`au are prapasing a fatal of l 3 bioretentian :facilities in lieu of using level spreaders.
a. Please use th.e; b.iort.tentiorz supplement workshcit located at
http:ffh2a.enr.state.zzc.us/suldocurrzc.ntsfT3iore*entian.AreaS'upplement=l?RAPTI l -
l.pd#'.
4010versight ~ Express Review Perrnitfing unit
16b0 NYaii Service Center, Raleigh, North Carolina 27699.1550
2321 Crabtree Eintrlavard, Suite 250, f2a4eigh, North Carolina 27604
Phone. [phone] FAX [phone] i Internet: tltt~_lhlci,flrlr; St~t~.i~c.clsJric;~tlands
;~o'thC;aror~,ta.a
fil~irtt~rrx~~
6n Frniol (lnnnrkiwi4vlA3'r17115Ai1VP. Ar:NanF..n1C110Ver- 50°10 Recvcied/10°k Past Consumer Paper

,' ~ r
C"edar ltic-lge Subcf:ivision
Page 2 of
July '1.1, 2Q07
1-,. UWQ regLria-c:s a zninimiim of tihree {3) tree species; t.hrerv (3}shrub species; and tha•ee
{3) ~n•ound Dover species. ~'ou have not provided. the m:inintu:zn amount of plant
diversity.
c, You havr^ 4pec:iti.ed.A~i°~r'~ cef°ifercz (wvax na:yrtle). '1'hYS species fixes atmospheric
nitrogen and should. n.ot "Eie used fo.r nutrient reduction. Please specify a different
species. See Chapter l2 Bioretentaon [http://h?.o.enr.state.nc:us~sz>ldocuments/C:h l2-
Bioretention 4t)O:pdf~.
d. x,11 plants proposed fir your bioretenti.on facilities must be ahli: to «~ithsttind the
pandi:ng depth. you have indicated..
e, You have s}.7ecified. a soil media. depth of 2,5 f'ect. This is sha.llawer than 1:~1NQ
m:inirrium stan.daa•ds to:r planting trees and shrubs.
f. You. have not inchcded soil spccifica.tions for the bioretr.nti.on facilities ita your
construction plans.
. _ _ . __
.... _ _, __ _ .. - -g, Please descril3"e how'the planting :>ail infiltratxm rate -was "deteri~riiit~d:
h. 'T'he constz~ucticm details for the bioretentio:n facilities dc, not appear to include an
underciiain. Please explain.
i. Your construction plans contain inadecfuatc detail regarcliizg the segtiencin.g of the.
bioretention construction. Please clescz~ibe when and i~o~,v tfie hioreten#iott facilities
will. be constructed.,
j. Sheet 9A of 35 I:.andscape l~iotes. Your project is located in Ro.l.esville, NC. Please
, ex.pla.itt the references to the Town of Cary Standard Appearance Specifications
iWlanttal. and Gfte 'F'otvn of Cary site inspectors.
k. Main#enance Agreement, page 13 of 14 Itezzz 1(113 includes fcrtili:zin.g in April and
October. '1'ltis information conflicts with page S of l4 item 4. DWQ will not allow
rs~gtilar semi-annual. fertilizin}; as the purpose a>f the bioretention facilities i.s to reduce
nutrients in a. Nutrient Sensitive Water watershed.,
Please respond within five {S} clays of the date oE'this letter by sending three {3) copies of the above
information in writing. The Express Review Program. is a process that. requires all parties to participate ire a
timely manner.
This letter only addresses the application review "anal. does not authorize any impacts to wetlands, v~Taters
or protected buffers. Please be aware that any impacts requested ~~ithitt your application are not
authorized {at this Brno} by the DWt~. Please contact Lia Myott or Cynthia "Van .Der Wiele at {9110 733-
178+7 if yoti;hai+~; any "rl~xcstions regarding or would like "to set up a Ytieetizig to discuss this znai:ter.
Sin ~ ely, ~
A ~ ~~
~ ~.~~
Cyndi Karoly, Supervisor
4{?1. Oversight/Exl~ress Rey-•iew 1'ei-mitting Unit
C`Bl~fcvc'lvr/tern
GL: tJSAt'1~ ltalcigh 12.egt1latUry F'ic:ld OffICC
1~WQ Raleigh Regional Office
File Copy
Central. Files
Jay 1Cel.ler,l~.el:ler Environmental, 71321. I.layznarket Lane; Raleigh, NC 27615
Harold Yel.lc;, Aiken and Yelle Assoc., PA, 3755 Benson Drive, Raleigh, NC 276013