SW6221006_Stormwater Narrative_20230214

Stormwater Narrative and Calculations for the
NCDEMLR Post Construction Stormwater Management
Permit
for the
+/- 20,000-SF Distribution Facility Expansion for
CCBCC- Fayetteville
in
Cumberland County, North Carolina
Prepared For:
CCBCC Operations, LLC
rn
C ".W, re , 6 �
CONSOLIDATED
Prepared By:
Fitts and Goodwin, Inc.
120 Corporate Blvd.
West Columbia, SC 29169
NC License 051479
Initial Submittal: 09/09/2022
Res u b m itta I : 02/ 14/2023

Table of Contents
Narrative....................................................................................................................................................... 2
SiteMaps......................................................................................................................................................3
Drainage Area and Runoff Calculations...................................................................................................... 15
Contech — Filterra Calculations...................................................................................................................17
CCBCC Fayetteville 1 septe bee 2 " February 2023

Narrative
These calculations have been prepared to address NCDEMLR's post -construction
stormwater management requirements for the +/- 20,000-SF Distribution Facility
Expansion for CCBCC-Fayetteville. The site is located at 800 Tom Starling Rd.
Fayetteville, NC (34057'8.21 "N, 78053'37.76"W) which is an unincorporated area of
Cumberland County.
The current site totals +/- 13.7-acres and includes +/- 6.75-acres of existing built -upon
area (BUA). The existing BUA consists of a +/- 45,000-sf warehouse and a +/- 6,500-sf
maintenance facility with the remainder being parking and truck court space.
Stormwater runoff from this existing BUA is conveyed through a pipe network to an
existing wet detention pond located in the northwest quadrant of the site. The remaining
areas of the site are grassed, landscaped, and wooded and runoff from these areas
bypasses the existing detention pond.
The proposed development of the site will include a +/- 20,000-sf expansion to the
existing warehouse and expansion of the existing truck court which will result in a net
increase of +/- 0.73-ac of impervious area. The total proposed drainage area will be +/-
8.07-ac consisting of +/- 6.75-ac of existing BUA, +/- 0.73-ac of new BUA, and +/- 0.59-
ac of grassed area. The proposed drainage pattern will remain consistent with the
existing pattern and runoff from the new impervious area will be conveyed to the
existing wet detention pond through the existing pipe network. To meet water quality
requirements, a Filterra system will be installed adjacent to the +/-1.04-ac existing
employee parking lot off of Tom Starling Rd. This system will treat +/- 0.98-ac of existing
BUA which exceeds the area of new BUA.
The USGS Soil Survey indicates the site consists of Torhunta (HSG A/D) and Kalmia
(HSG B) soils. FEMA Flood Panel 3720043300J indicates the site is located in Zone X —
Area of Minimal Flood Hazard.
CCBCC Fayetteville 2 septe bee 2 " February 2023

Site Maps
CCBCC Fayetteville 3 gepte bee 2^" February 2023

"Of US Topo
Abdnd
HOPE MILLS QUADRANGLE
NORTH CAROLINA
7.5-MINUTE SERIES
-78.875(
88 89 90 91 92 93

National Flood Hazard Layer FI RMette
78o53'50"W 34o57'23"N
t
EfL.ATDCOUNTY' "
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eff. 1 j�/2oo�
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FEMA
4 •
Ob
{
Feet 1:61000 i8us3'13"W 34"S6'S3"N
0 250 500 1,000 1,500 2,000
Basemap: USGS National Map: Orthoimagery: Data refreshed October, 2020
Legend
SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT
Without Base Flood Elevation (BFE)
Zone A, V, A99
SPECIAL FLOOD With BFE or Depth ZoneAE, AO, AH, VE, AR
HAZARD AREAS Regulatory Floodway
0.2% Annual Chance Flood Hazard, Areas
of 1% annual chance flood with average
depth less than one foot or with drainage
areas of less than one square mile Zonex
Future Conditions 1% Annual
4 '- Chance Flood Hazard Zonex
" Area with Reduced Flood Risk due to
OTHER AREAS OF Levee. See Notes. Zone
FLOOD HAZARD " Area with Flood Risk due to Leveezone D
NO SCREEN Area of Minimal Flood Hazard
Q Effective LOMRs
OTHER AREAS Area of Undetermined Flood Hazard
GENERAL - — - - Channel, Culvert, or Storm Sewer
STRUCTURES i i i i i i i Levee, Dike, or Floodwall
e zo.z Cross Sections with 1% Annual Chance
17.5 Water Surface Elevation
a - - - Coastal Transect
—sfa— Base Flood Elevation Line (BFE)
Limit of Study
Jurisdiction Boundary
— --- Coastal Transect Baseline
OTHER _ Profile Baseline
FEATURES Hydrographic Feature
❑ Digital Data Available AN
0 No Digital Data Available
MAP PANELS ® Unmapped
QThe pin displayed on the map is an approximate
point selected by the user and does not represent
an authoritative property location.
This map complies with FEMA's standards for the use of
digital flood maps if it is not void as described below.
The basemap shown complies with FEMA's basemap
accuracy standards
The flood hazard information is derived directly from the
authoritative NFHL web services provided by FEMA. This map
was exported on 8/31/2022 at 8:39 AM and does not
reflect changes or amendments subsequent to this date and
time. The NFHL and effective information may change or
become superseded by new data overtime.
This map image is void if the one or more of the following map
elements do not appear: basemap imagery, flood zone labels,
legend, scale bar, map creation date, community identifiers,
FIRM panel number, and FIRM effective date. Map images for
unmapped and unmodernized areas cannot be used for
regulatory purposes.

Soil Map —Cumberland County, North Carolina
691300 691500 691700 691900 692100 692300 692500 692700 692900 693100 693300
34o 5731" N
r
�i
g
0
r
�i
g
r
8
34o 56'36"N
691300 691500 691700 691900 692100 692300 692500
Map Scale: 1:11,900 if printed on A landscape (11" x 8.5") sheet.
Meters
N 0 150 300 E00 900
Feet
0 500 1000 2000 3000
Map projection: Web Mercator Conermordinates: WGS84 Edge tics: lfrM Zone 17N WGS84
usoA Natural Resources Web Soil Survey
Conservation Service National Cooperative Soil Survey
692700 692900 693100 6933M
6935M 693700
34o 5731" N
r
�i
r
�i
g
0
r
�i
g
34o 56' 36" N
693500 693700
a
8/31/2022
Page 1 of 3

MAP LEGEND
Area of Interest (AOI)
0
Area of Interest (AOI)
Soils
0
Soil Map Unit Polygons
,N
Soil Map Unit Lines
Soil Map Unit Points
Special
Point Features
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
�i
Gravelly Spot
0
Landfill
A.
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
o
Sodic Spot
Soil Map —Cumberland County, North Carolina
MAP INFORMATION
Spoil Area
The soil surveys that comprise your AOI were mapped at
1:24,000.
Stony Spot
Very Stony Spot
Warning: Soil Map may not be valid at this scale.
Wet Spot
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
4�
Other
line placement. The maps do not show the small areas of
Special Line Features
contrasting soils that could have been shown at a more detailed
scale.
Water Features
Streams and Canals
Please rely on the bar scale on each map sheet for map
measurements.
Transportation
Rails
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
. 0
Interstate Highways
Coordinate System: Web Mercator (EPSG:3857)
US Routes
Maps from the Web Soil Survey are based on the Web Mercator
Major Roads
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Local Roads
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
Background
Aerial Photography
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Cumberland County, North Carolina
Survey Area Data: Version 23, Jan 21, 2022
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Apr 11, 2022—May
15, 2022
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
usoA Natural Resources Web Soil Survey 8/31/2022
Conservation Service National Cooperative Soil Survey Page 2 of 3

Soil Map -Cumberland County, North Carolina
Map Unit Legend
Map Unit Symbol
Map Unit Name
Acres in AOI
Percent of AOI
BaD
Blaney loamy sand, 8 to 15
percent slopes
2.3
0.4%
GdB
Gilead loamy sand, 2 to 8
percent slopes
47.2
7.4%
GoA
Goldsboro loamy sand, 0 to 2
percent slopes, Southern
Coastal Plain
5.0
0.8%
JT
Johnston loam
30.5
4.8%
KaA
Kalmia loamy sand, 0 to 2
percent slopes
69.8
11.0%
KeA
Kenansville loamy sand, 0 to 3
percent slopes
178.5
28.0%
LaB
Lakeland sand, 1 to 8 percent
slopes
13.2
2.1 %
Le
Leon sand
26.5
4.2%
Pa
Pactolus loamy sand
7.7
1.2%
Pg
Pantego loam
8.7
1.4%
Ra
Rains sandy loam, 0 to 2
percent slopes
9.7
1.5%
TaB
Tarboro loamy sand, 0 to 6
percent slopes
3.5
0.5%
TR
Torhunta and Lynn Haven soils
223.2
35.0%
Ud
Udorthents, loamy
1.8
0.3%
VaD
Vaucluse loamy sand, 8 to 15
percent slopes
7.5
1.2%
VgE
Vaucluse-Gilead loamy sands,
15 to 25 percent slopes
1.8
0.3%
Totals for Area of Interest
637.0
100.0%
USDA Natural Resources Web Soil Survey 8/31/2022
Conservation Service National Cooperative Soil Survey Page 3 of 3

Engineering Properties ---Cumberland County, North Carolina
Engineering Properties
This table gives the engineering classifications and the range of engineering
properties for the layers of each soil in the survey area.
Hydrologic soil group is a group of soils having similar runoff potential under
similar storm and cover conditions. The criteria for determining Hydrologic soil
group is found in the National Engineering Handbook, Chapter 7 issued May
2007(http://directives.sc.egov.usda.gov/OpenNonWebContent.aspx?
content=17757.wba). Listing HSGs by soil map unit component and not by soil
series is a new concept for the engineers. Past engineering references contained
lists of HSGs by soil series. Soil series are continually being defined and
redefined, and the list of soil series names changes so frequently as to make the
task of maintaining a single national list virtually impossible. Therefore, the
criteria is now used to calculate the HSG using the component soil properties
and no such national series lists will be maintained. All such references are
obsolete and their use should be discontinued. Soil properties that influence
runoff potential are those that influence the minimum rate of infiltration for a bare
soil after prolonged wetting and when not frozen. These properties are depth to a
seasonal high water table, saturated hydraulic conductivity after prolonged
wetting, and depth to a layer with a very slow water transmission rate. Changes
in soil properties caused by land management or climate changes also cause the
hydrologic soil group to change. The influence of ground cover is treated
independently. There are four hydrologic soil groups, A, B, C, and D, and three
dual groups, A/D, B/D, and C/D. In the dual groups, the first letter is for drained
areas and the second letter is for undrained areas.
The four hydrologic soil groups are described in the following paragraphs:
Group A. Soils having a high infiltration rate (low runoff potential) when
thoroughly wet. These consist mainly of deep, well drained to excessively
drained sands or gravelly sands. These soils have a high rate of water
transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well
drained soils that have moderately fine texture to moderately coarse texture.
These soils have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of
water transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink -swell
potential, soils that have a high water table, soils that have a claypan or clay
layer at or near the surface, and soils that are shallow over nearly impervious
material. These soils have a very slow rate of water transmission.
Depth to the upper and lower boundaries of each layer is indicated.
USDA Natural Resources Web Soil Survey 8/17/2022
Conservation Service National Cooperative Soil Survey Page 1 of 6

Engineering Properties ---Cumberland County, North Carolina
Texture is given in the standard terms used by the U.S. Department of
Agriculture. These terms are defined according to percentages of sand, silt, and
clay in the fraction of the soil that is less than 2 millimeters in diameter. "Loam,"
for example, is soil that is 7 to 27 percent clay, 28 to 50 percent silt, and less than
52 percent sand. If the content of particles coarser than sand is 15 percent or
more, an appropriate modifier is added, for example, "gravelly."
Classification of the soils is determined according to the Unified soil classification
system (ASTM, 2005) and the system adopted by the American Association of
State Highway and Transportation Officials (AASHTO, 2004).
The Unified system classifies soils according to properties that affect their use as
construction material. Soils are classified according to particle -size distribution of
the fraction less than 3 inches in diameter and according to plasticity index, liquid
limit, and organic matter content. Sandy and gravelly soils are identified as GW,
GP, GM, GC, SW, SP, SM, and SC; silty and clayey soils as ML, CL, OL, MH,
CH, and OH; and highly organic soils as PT. Soils exhibiting engineering
properties of two groups can have a dual classification, for example, CL-ML.
The AASHTO system classifies soils according to those properties that affect
roadway construction and maintenance. In this system, the fraction of a mineral
soil that is less than 3 inches in diameter is classified in one of seven groups
from A-1 through A-7 on the basis of particle -size distribution, liquid limit, and
plasticity index. Soils in group A-1 are coarse grained and low in content of fines
(silt and clay). At the other extreme, soils in group A-7 are fine grained. Highly
organic soils are classified in group A-8 on the basis of visual inspection.
If laboratory data are available, the A-1, A-2, and A-7 groups are further
classified as A-1-a, A-1-b, A-2-4, A-2-5, A-2-6, A-2-7, A-7-5, orA-7-6. As an
additional refinement, the suitability of a soil as subgrade material can be
indicated by a group index number. Group index numbers range from 0 for the
best subgrade material to 20 or higher for the poorest.
Percentage of rock fragments larger than 10 inches in diameter and 3 to 10
inches in diameter are indicated as a percentage of the total soil on a dry -weight
basis. The percentages are estimates determined mainly by converting volume
percentage in the field to weight percentage. Three values are provided to
identify the expected Low (L), Representative Value (R), and High (H).
Percentage (of soil particles) passing designated sieves is the percentage of the
soil fraction less than 3 inches in diameter based on an ovendry weight. The
sieves, numbers 4, 10, 40, and 200 (USA Standard Series), have openings of
4.76, 2.00, 0.420, and 0.074 millimeters, respectively. Estimates are based on
laboratory tests of soils sampled in the survey area and in nearby areas and on
estimates made in the field. Three values are provided to identify the expected
Low (L), Representative Value (R), and High (H).
Liquid limit and plasticity index (Atterberg limits) indicate the plasticity
characteristics of a soil. The estimates are based on test data from the survey
area or from nearby areas and on field examination. Three values are provided to
identify the expected Low (L), Representative Value (R), and High (H).
References:
American Association of State Highway and Transportation Officials (AASHTO).
2004. Standard specifications for transportation materials and methods of
sampling and testing. 24th edition.
USDA Natural Resources Web Soil Survey 8/17/2022
Conservation Service National Cooperative Soil Survey Page 2 of 6

Engineering Properties ---Cumberland County, North Carolina
American Society for Testing and Materials (ASTM). 2005. Standard
classification of soils for engineering purposes. ASTM Standard D2487-00.
USDA Natural Resources Web Soil Survey 8/17/2022
Conservation Service National Cooperative Soil Survey Page 3 of 6

Engineering Properties ---Cumberland County, North Carolina
Report —Engineering Properties
Absence of an entry indicates that the data were not estimated. The asterisk'*' denotes the representative texture; other
possible textures follow the dash. The criteria for determining the hydrologic soil group for individual soil components is
found in the National Engineering Handbook, Chapter 7 issued May 2007(http://directives.sc.egov.usda.gov/
Open NonWebContent. aspx?content= 1 7757.wba). Three values are provided to identify the expected Low (L),
Representative Value (R), and High (H).
Engineering Properties —Cumberland County, North Carolina
Map unit symbol and
Pct. of
Hydrolo
Depth
USDA texture
Classification
Pct Fragments
Percentage passing sieve number—
Liquid
Plasticit
soil name
map
gic
limit
y index
unit
group
Unified
AASHTO
>10
3-10
4
10
40
200
inches
inches
In
L-R-H
L-R-H
L-R-H
L-R-H
L-R-H
L-R-H
L-R-H
L-R-H
KaA—Kalmia loamy
sand, 0 to 2 percent
slopes
Kalmia
85
B
0-8
Loamy sand, loamy
SC-SM,
A-2-4
0-0-0
0-0-0
92-100-
92-100-
64-82-
9-22- 25
9-12 -14
NP
fine sand
SM
100
100
85
8-12
Loamy sand, loamy
SC-SM,
A-2-4, A-4
0-0-0
0-0-0
76-96-1
75-96-1
55-76-
19-29-
9-12 -14
NP
fine sand, sandy
SM
00
00
89
40
loam, fine sandy
loam
12-32
Sandy clay loam,
SC-SM,
A-2-4,
0-0-0
0-0-0
76-96-1
75-96-1
45-82-
19-48-
7-25 -45
NP-9
sandy loam, loam,
CL, ML,
A-4,
00
00
96
60
-18
fine sandy loam
SC, SM
A-6,
A-7-6
32-80
Sand, fine sand,
SP-SM,
A-2-4
0-0-0
0-0-0
77-97-1
76-97-1
53-79-
8-21- 25
9-12 -14
NP
loamy sand,
SM
00
00
85
loamy fine sand
USDA Natural Resources Web Soil Survey 8/17/2022
Conservation Service National Cooperative Soil Survey Page 4 of 6

Engineering Properties ---Cumberland County, North Carolina
Engineering Properties —Cumberland County, North Carolina
Map unit symbol and
Pct. of
Hydrolo
Depth
USDA texture
Classification
Pct Fragments
Percentage passing sieve number—
Liquid
Plasticit
soil name
map
gic
limit
y index
unit
group
Unified
AASHTO
>10
3-10
4
10
40
200
inches
inches
In
L-R-H
L-R-H
L-R-H
L-R-H
L-R-H
L-R-H
L-R-H
L-R-H
KeA—Kenansville
loamy sand, 0 to 3
percent slopes
Kenansville
90
A
0-8
Fine sand, loamy
SM
A-2-4
0-0-0
0-0-0
100-100
95-97-1
73-77-
18-22-
9-12 -14
NP
sand
-100
00
84
26
8-24
Fine sand, loamy
SM
A-2-4
0-0-0
0-0-0
100-100
95-97-1
73-77-
18-22-
9-12 -14
NP
sand
-100
00
84
26
24-36
Sandy clay loam,
SC-SM,
A-2-4,
0-0-0
0-0-0
100-100
94-96-1
68-75-
32-39-
16-23
2-7-14
sandy loam, fine
SC, SM
A-4, A-6
-100
00
88
50
-32
sandy loam
36-42
Sandy loam, fine
SC-SM,
A-2-4
0-0-0
0-0-0
100-100
94-96-1
71-77-
18-23-
0-19 -27
NP-4
sandy loam,
SM
-100
00
88
32
-10
loamy sand, sand
42-84
Sand, loamy sand,
SP-SM,
A-2-4
0-0-0
0-0-0
100-100
95-97-1
70-75-
6-11- 16
6-10 -13
NP
loamy fine sand
SM
-100
00
82
USDA Natural Resources Web Soil Survey 8/17/2022
Conservation Service National Cooperative Soil Survey Page 5 of 6

Engineering Properties ---Cumberland County, North Carolina
Engineering Properties —Cumberland County, North Carolina
Map unit symbol and
Pct. of
Hydrolo
Depth
USDA texture
Classification
Pct Fragments
Percentage passing sieve number—
Liquid
Plasticit
soil name
map
gic
limit
y index
unit
group
Unified
AASHTO
>10
3-10
4
10
40
200
inches
inches
In
L-R-H
L-R-H
L-R-H
L-R-H
L-R-H
L-R-H
L-R-H
L-R-H
TR—Torhunta and
Lynn Haven soils
Lynn haven,
41
A/D
0-9
Sand
SP-SM,
A-2-4, A-3
0- 0- 0
0-0-0
100-100
100-100
75-77-
7- 9- 12
6-10-13
NP
undrained
SP
-100
-100
80
9-12
Sand, fine sand
SP-SM,
A-2-4, A-3
0- 0- 0
0-0-0
100-100
100-100
75-77-
6-7-9
6-10 -13
NP
SM, SP
-100
-100
78
12-80
Sand, fine sand,
SC-SM,
A-2-4, A-3
0- 0- 0
0-0-0
100-100
100-100
74-77-
7-10-13
6-10 -13
NP
loamy sand
SM
-100
-100
80
Torhunta, undrained
39
A/D
0-15
Loam, loamy fine
SC-SM,
A-2-4, A-4
0- 0- 0
0-0-0
100-100
95-96-1
80-88-
34-41-
15-20
NP-2 -4
sand, fine sandy
SM
-100
00
98
49
-25
loam, loamy sand
15-40
Sandy loam, fine
SC-SM,
A-2-4, A-4
0- 0- 0
0-0-0
100-100
95-96-1
80-88-
34-41-
15-20
NP-4 -7
sandy loam
SM
-100
00
98
49
-25
40-80
Loamy sand, sand,
SC-SM,
A-2-4, A-3
0- 0- 0
0-0-0
100-100
95-97-1
69-78-
17-25-
9-12 -14
NP
sandy loam
SP-SM,
-100
00
89
34
SM
Torhunta, drained
10
A/D
0-15
Loam, loamy fine
SC-SM,
A-2-4, A-4
0- 0- 0
0-0-0
100-100
95-96-1
80-88-
34-41-
15-20
NP-2 -4
sand, fine sandy
SM
-100
00
98
49
-25
loam, loamy sand
15-40
Sandy loam, fine
SC-SM,
A-2-4, A-4
0- 0- 0
0-0-0
100-100
95-96-1
80-88-
34-41-
15-20
NP-4 -7
sandy loam
SM
-100
00
98
49
-25
40-80
Loamy sand, sand,
SC-SM,
A-2-4, A-3
0- 0- 0
0-0-0
100-100
95-97-1
69-78-
17-25-
9-12 -14
NP
sandy loam
SP-SM,
-100
00
89
34
SM
Data Source Information
Soil Survey Area: Cumberland County, North Carolina
Survey Area Data: Version 23, Jan 21, 2022
USDA Natural Resources Web Soil Survey 8/17/2022
Conservation Service National Cooperative Soil Survey Page 6 of 6

Drainage Area and Runoff Calculations
CCBCC Fayetteville 15 Septe bee 2^" February 2023

Drainage Area and Runoff Calculations
for
+/-20,000-SF Distribution Facility Expansion for CCBCC-Fayetteville
Drainage Area: Drainage Area to Bioretention
Runoff Calculation Method: Discrete
Drainage Area Characteristics:
CN
Total Drainage Area =
1.04
ac
Directly Connected Impervious Area =
0.98
ac
98
Other Area =
0.06
ac
61
Design Storm Depth =
1.0
in
NRCS Curve Number Method for Runoff Volume:
S =
1000 _ 10
CN
Where:
5 =
Maximum retention after rainfall begins (in)
CN =
Curve number (unitless)
* _
(P - 0.2S)2
(P + 0-$)
Where:
Cl` =
Runoff depth (in)
P =
Rainfall depth (in)
Directly
Connected Imp.
Area
Other Area
CN =
98.0
61
S =
0.20
0
P=
1
0
Q* =
0.7909
0
Total Q* (ft3) =
2814
Minimum Treatment Volume Required = 2,814 cu ft
Minimum Treatment Volume Provided = (See Contech-Filterra Calculations Attached)
Project No.: 22000-0600
Date: September 2022 Revised January 2023

Contech - Filterra Calculations
CCBCC Fayetteville 17 SepteMbeF 2^" February 2023

C N T E C H°
ENGINEERED SOLUTIONS
Design Engineer:
Date
Site Information
Project Name
Project State
Project Location
Drainage Area, Ad
Impervious Area, Ai
Impervious Runoff Coefficient, Ci
Pervious Area, Ap
Pervious Area Runoff Coefficient, Cp
% Impervious
Weighted Runoff Coefficient, Cw
Filterra Sizing Calculations
Filter Surface Area / Drainage Area Ratio
Required Filterra Media Surface Area,
Filterra System
Filterra Configuration
Filterra Model ID
Filterra Sizing in North Carolina
JAK
2/2/2023
CCBCC Distribution Facility Expansion
North Carolina
Fayetteville
0.52 ac
0.49 ac
0.90
0.03
0.30
94%
0.86
0.39%
85 ft2
Offline
FT 7x13 / 13x7
Blue Cells = Input
Black Cells = Calculation
Per NCDEQ Manual, Chapter D.3, Table 1
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