WQ0044731_More Information (Received)_20240408

4:0 PIEDMONT
ENVIRONMENTAL
ASSOC I AT E S, P_ A.
7/ 19/2023
REVISED 1/11/24
Carpenter Companies
PO Box 891
Morrisville, NC, 27560
Project # 3310
Soils Report for Proposed Residential Surface Spray Wastewater Irrigation System
Project Name: Marthas Vineyard, Lot 4A
Location: Martha's Vineyard Way, Apex, Chatham, PIN: 0019629 (Approx. 7 acres)
A detailed soil evaluation on the above referenced tract was conducted to determine
suitability for a subsurface or surface wastewater system. This report is being prepared to
satisfy the requirements set forth by 15A NCAC 02T.0600 concerning the soils report for
single family surface wastewater systems since this property does not contain enough
suitable soils to support a 5-bedroom subsurface septic system. The location and
characteristics of a site that is potentially useable for a surface drip irrigation wastewater
system was identified. This report details our findings and provides the necessary
soil/site information needed for a surface irrigation system to be designed by a
professional engineer. This fieldwork was completed in January, 2022. Site conditions
have not changed as of re -submittal of this soil report in January of 2024.
The potentially useable soil area was located in the field and is shown on the
accompanying soils map (Attachment 1). The proposed disposal area is compliant with
buffers for surface wastewater systems. The map also shows the locations where
measurements of saturated hydraulic conductivity (Ksat) were performed.
This site is located in the "Triassic Basin" geologic unit of Chatham County. Upland
soils on the site are generally similar to the Creedmoor-Green Level Complex soil series.
These soils have expansive clay mineralogy and may have indications of soil wetness
present in the subsurface horizons. Soil wetness indicators are considered to be
perched based on guidance and interpretations of the Chatham County soil survey
document. These types of soils are generally unsuitable for conventional subsurface
septic systems. However, the favorable soil characteristics of the surface horizons offer
the opportunity for surface application of treated wastewater.
Soil Evaluation
The soil condition of the proposed wastewater area is described with the borings shown
on the attached soils map, as well as in the accompanying Ksat location soil profile
descriptions (Attachment 2).
216 S. Swing Rd., Suite 1 Y. Greensboro, NC 27409 Y. 336-662-5487

The landscape position for the proposed irrigation field is on a broad side slope with a
sandy loam A horizon. We recommend a maximum instantaneous irrigation rate of no
greater than 0.2 in/hr for design purposes. Measurements of saturated hydraulic
conductivity (Ksat) were conducted within the Bt horizon at three locations within each
of the two proposed drip disposal area. The Bt horizon was tested because it was the
most restrictive soil horizon based on texture and mineralogy.
The geometric mean Ksat of the native Bt horizon (most restrictive) was 0.006 in/hr.
Ksat calculations and field data are shown in Attachment 3. Numbers utilized to
compute the Ksat value at each test location are shown in bold font.
Single Family Loading Rate Worksheet
A single-family water balance calculation was conducted per the above referenced
regulation. Based on the geometric mean Ksat and our field observations, these soils fall
under Loading Rate Group SFR-C and could therefore be loaded from 13.0-19.5 in/yr.
Parameters utilized in the SFR Irrigation Area Calculation Worksheet are described
below:
Potential Evapotranspiration (PET) and 80th Percentile Irrigation:
Data from a nearby site (RDU International Weather Station) for a 58 year period was
utilized in the model per NC DWQ policy guidelines for these parameters. This data is
shown in the attached SFR Irrigation Area Calculation Worksheet (Attachment 4).
Drainage Rate and Discussion of Drainage Coefficient Utilized in the SFR Irrigation
Area Worksheet:
We are proposing a drainage coefficient of 70.8%, which results in an actual Annual
Hydraulic Loading Rate of 18.67 inches/year.
Drainage coefficients were first introduced by US EPA as a way of "penalizing"
wastewater movement through the soil profile since it was assumed that wastewater
carried concentrations of organic substances that would form a "biomat", subsequently
retarding the rate of this wastewater movement over time. It is generally held that the
cleaner the wastewater, the higher the drainage coefficient that could be specified.
Unfortunately, to our knowledge, no rigorous scientific testing has been conducted to
assess how this coefficient can vary as a function of wastewater treatment. In this case, a
relatively high level of treatment (TSII) is specified for the proposed waste stream, and a
drainage coefficient of 70.8% allowed for an annual irrigation rate that was in the range
of appropriate values for the loading rate groups provided by NC DEQ. Similar annual

loading rates have been specified for soils in this region by NC DEQ for many years,
including adjacent lots in this same project.
In the case of this submittal, the Ksat data were found to be relatively consistent with one
another. We recognize that the subsoil is restrictive as evidenced by the perched soil
wetness indicators, but the proposed drain field is located mostly on a broad linear side
slope with 4-5% slopes, thereby preventing ponding of any applied wastewater. The soil
characteristics are also consistent with one another as evidenced by the soil boring logs
and soil profile descriptions, suggesting that unexpected soil inclusions should not be of
concern.
Standard Fertility Analysis
Soils within the proposed spray area were also analyzed for current fertility conditions.
Because of similar landscape type and management conditions, one composite sample
was used to infer soil fertility status within the proposed dispersal area. The standard soil
fertility analysis was completed by Waypoint Analytical Laboratories, Inc. Soil sample
results are included in "Soil Analysis Report" provided by Waypoint Analytical
(Attachment 5). Base saturation and exchangeable sodium percentage were determined
by calculation to be 38% and 3.29% respectively. Appendix 5 also contains information
on other soil parameters such as specific nutrient indices and pH.
Conclusions
Site disturbance could create unsuitable conditions for the proposed system and should
therefore be minimized prior to construction. A permanent vegetative cover should be
immediately established and/or maintained over the entire application field after
installation.
An individual wastewater system permit will be required for this property prior to
obtaining a building permit. This will involve a detailed evaluation by the state to
determine, among other things, system size and layout, drive/parking and building
location. Only after developing this information can a final determination be made
concerning specifics of system design and site utilization. The letter of denial regarding
subsurface septic systems issued by Chatham County Environmental Health should also
be included in the application for a surface application system.

If you have any further questions, please feel free to call [phone].
Sincerely,
G. Christopher Murray, MS
NC Licensed Soil Scientist
Piedmont Environmental Associates, PA
List of Attachments:
Attachment 1 - Soil Map
Attachment 2 - Soil Profile Descriptions at Ksat Locations
Attachment 3 - Ksat Summary and Field Data
Attachment 4 - SFR Irrigation Area Workbook Pages (Including Project Information,
Potential Evapotranspiration Worksheet, 801 Percentile Precipitation Worksheet and
Irrigation Area Calculation Worksheet)
Attachment 5 - Standard Fertility Analysis

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Attachment 2 - Soil Profile Descriptions at Ksat Locations
Project:
Marthas Vineyard, 4A
% Slope:
4%
Site:
Nest 1
Vegetation:
Wooded
PIEDMONT
Name:
Marthas Chapel
Conducted By:
GC Murray
Date:
2/2/23
P
ENVIRONMENTAL
Soil Series:
A S S 0 C I A T E S P.A.
ca
a�
y
r
w
w
N
a
c
+3
to
s
LO
to
L
o
v
c3
C7
fn
IL
N
U
U
Q
�y�
V/ U
Q y
U
N S
,L i+
k
G1
G1
G1 k 01
r
y
c
y
i+
i+
iy+
iy+ -0
L
L
L
(�
A
0-6
10YR 6/4
-
-
I -
moist
sl
wk
med
qr
fr
ss
s
Bt
7-25
10YR 6/8
10YR 6/1, 2.5YR 5/8
com
medtC&D
moist
c
mod
med
sbk
vfi
vs
v
BC
26-49
10YR 6/4
10YR 6/1, 2.5YR 5/8
com
med
moist
scl
mod
med
sbk
vfi
vs
v
C
50-84
2.5YR3/4
10YR 6/1, 2.5YR 5/8
com
med
moist
sl
structureless, massive
fr
s
Legend.
Texture
s
sand
I
loam
si
silt
sil
silt loam
c
clay
cl
clay loam
scl
sandy clay loam
sl
sandy loam
Sid
silty clay loam
Structure Grade
Structure Type
wk weak
gr
granular
m moderate
pl
platy
str strong
pr
prismatic
cpr
columnar
abk
angular blocky
sbk
subangular blocky
sg
single grained
ma
massive
Seasonal Hi h Water Table:
Structure Size
Depth Type (apparent/perched):
f
fine
12 perched
med
medium
p SOIL sc."
" Q H ER � ►�
v �G
Moist Consistency
� �• •
�t x
fr
friable
a
�7 Y
vfr
very friable
fi
firm
vfi
very firm
�bani

Attachment 2 - Soil Profile Descriptions at Ksat Locations
Project:
Marthas Vineyard, 4A
% Slope:
4%
Site:
Nest
Vegetation:
Wooded
PIEDMONT
Name:
Marthas Chapel
Conducted By:
GC Murray
Date:
2/2/23
P
ENVIRONMENTAL
Soil Series:
A S S 0 C I A T E S P.A.
ca
a�
y
r
w
w
N
a
c
+3
to
s
LO
to
L
o
v
c3
C7
fn
�
N
U
U
Q
�y�
V/ U
Q y
U
N S
,L i+
k
G1
G1
G1 k 01
r
y
c
y
i+
i+
iy+
iy+ -0
L
L
L
(�
A
0-3
10YR 6/4
-
-
I -
moist
sl
wk
med
qr
fr
ss
s
Bt
4-20
10YR 6/8
10YR 6/1, 2.5YR 5/8
com
med
IC&D
moist
c
mod
med
sbk
vfi
vs
v
BC
21-48
10YR 6/4
10YR 6/1, 2.5YR 5/8
com
med
C&D
moist
scl
mod
med
sbk
vfi
vs
v
Legend.
Texture
s
sand
I
loam
si
silt
sil
silt loam
c
clay
cl
clay loam
scl
sandy clay loam
sl
sandy loam
Sid
silty clay loam
Structure Grade
Structure Type
wk weak
gr
granular
m moderate
pl
platy
str strong
pr
prismatic
cpr
columnar
abk
angular blocky
sbk
subangular blocky
sg
single grained
ma
massive
Seasonal Hi h Water Table:
Structure Size
Depth Type (apparent/perched):
f
fine
15 perched
med
medium
a SOIL sc..
Moist Consistency
fr
friable
,� Y
vfr
very friable
fi
firm
qt
vfi
very firm
Ataan+

Attachment 2 - Soil Profile Descriptions at Ksat Locations
Project:
Marthas Vineyard, 4A
% Slope:
4%
Site:
Nest
Vegetation:
Wooded
PIEDMONT
Name:
Marthas Chapel
Conducted By:
GC Murray
Date:
2/2/23
P
ENVIRONMENTAL
Soil Series:
A S S 0 C I A T E S P.A.
ca
a�
y
r
w
w
N
a
c
+3
to
s
LO
to
L
o
v
c3
C7
fn
�
N
U
U
Q
�y�
V/ U
Q y
U
N S
,L i+
k
G1
G1
G1 k 01
r
y
c
y
i+
i+
iy+
iy+ -0
L
L
L
(�
A
0-5
10YR 6/4
-
-
I -
moist
sl
wk
med
qr
fr
ss
s
Bt
6-24
10YR 6/8
10YR 6/1, 2.5YR 5/8
com
med
IC&D
moist
c
mod
med
sbk
vfi
vs
v
BC
25-48
10YR 6/4
10YR 6/1, 2.5YR 5/8
com
med
C&D
moist
scl
mod
med
sbk
vfi
vs
v
Legend.
Texture
s
sand
I
loam
si
silt
sil
silt loam
c
clay
cl
clay loam
scl
sandy clay loam
sl
sandy loam
Sid
silty clay loam
Structure Grade
Structure Type
wk weak
gr
granular
m moderate
pl
platy
str strong
pr
prismatic
cpr
columnar
abk
angular blocky
sbk
subangular blocky
sg
single grained
ma
massive
Seasonal Hi h Water Table:
Structure Size
Depth Type (apparent/perched):
f
fine
13 perched
med
medium
a SOIL sc..
Moist Consistency
fr
friable
,� Y
vfr
very friable
fi
firm
qt
vfi
very firm
Ataan+

Attachment 2 - Soil Profile Descriptions at Ksat Locations
Project:
Marthas Vineyard, 4A
% Slope:
4%
Site:
Nest
Vegetation:
Wooded
PIEDMONT
Name:
Marthas Chapel
Conducted By:
GC Murray
Date:
2/2/23
P
ENVIRONMENTAL
Soil Series:
A S S 0 C I A T E S P.A.
ca
a�
y
r
w
w
N
a
c
+3
to
s
LO
to
L
o
v
c3
C7
fn
�
N
U
U
Q
�y�
V/ U
Q y
U
N S
,L i+
k
G1
G1
G1 k 01
r
y
c
y
i+
i+
iy+
iy+ -0
L
L
L
(�
A
0-8
10YR 6/4
-
-
I -
moist
sl
wk
med
qr
fr
ss
s
Bt
8-19
10YR 6/8
10YR 6/1, 2.5YR 5/8
com
medtC&D
moist
c
mod
med
sbk
vfi
vs
v
BC
19-27
10YR 6/4
10YR 6/1, 2.5YR 5/8
com
med
moist
scl
mod
med
sbk
vfi
vs
v
C
27-66
2.5YR3/4
10YR 6/1, 2.5YR 5/8
com
med
moist
sl
structureless, massive
fr
s
Legend.
Texture
s
sand
I
loam
si
silt
sil
silt loam
c
clay
cl
clay loam
scl
sandy clay loam
sl
sandy loam
Sid
silty clay loam
Structure Grade
Structure Type
wk weak
gr
granular
m moderate
pl
platy
str strong
pr
prismatic
cpr
columnar
abk
angular blocky
sbk
subangular blocky
sg
single grained
ma
massive
Seasonal Hi h Water Table:
Structure Size
Depth Type (apparent/perched):
f
fine
12 perched
med
medium
a SOIL sc..
Moist Consistency
fr
friable
,� Y
vfr
very friable
fi
firm
qt
vfi
very firm
Ataan+

Attachment 2 - Soil Profile Descriptions at Ksat Locations
Project:
Marthas Vineyard, 4A
% Slope:
4%
Site:
Nests
Vegetation:
Wooded
PIEDMONT
Name:
Marthas Chapel
Conducted By:
GC Murray
Date:
2/2/23
P
ENVIRONMENTAL
Soil Series:
A S S 0 C I A T E S P.A.
ca
a�
y
r
w
w
N
a
c
+3
to
s
LO
to
L
o
v
c3
C7
fn
�
N
U
U
Q
�y�
V/ U
Q y
U
N S
,L i+
k
G1
G1
G1 k 01
r
y
c
y
i+
i+
iy+
iy+ -0
L
L
L
(�
A
0-7
10YR 6/4
-
-
I -
moist
sl
wk
med
qr
fr
ss
s
Bt
7-19
10YR 6/8
10YR 6/1, 2.5YR 5/8
com
medtC&D
moist
c
mod
med
sbk
vfi
vs
v
BC
19-26
10YR 6/4
10YR 6/1, 2.5YR 5/8
com
med
moist
scl
mod
med
sbk
vfi
vs
v
C
26-50
2.5YR3/4
10YR 6/1, 2.5YR 5/8
com
med
moist
sl
structureless, massive
fr
s
Legend.
Texture
s
sand
I
loam
si
silt
sil
silt loam
c
clay
cl
clay loam
scl
sandy clay loam
sl
sandy loam
Sid
silty clay loam
Structure Grade
Structure Type
wk weak
gr
granular
m moderate
pl
platy
str strong
pr
prismatic
cpr
columnar
abk
angular blocky
sbk
subangular blocky
sg
single grained
ma
massive
Seasonal Hi h Water Table:
Structure Size
Depth Type (apparent/perched):
f
fine
15 perched
med
medium
a SOIL sc..
Moist Consistency
fr
friable
,� Y
vfr
very friable
fi
firm
qt
vfi
very firm
Ataan+

Attachment 3, Geometric Mean Ksat Data, Martha's Chapel Lot 4A, Jan 2023
Nest
Horizon
Depth(")
Ksat (in/hr)
N1
Bt
18
0.001
N2
Bt
18
0.009
N3
Bt
18
0.013
Geometric Mean Ksat:
Horizon Ksat (in/hr)
Bt 0.005
NEW DATA BELOW
Attachment 3, Geometric Mean Ksat Data, Martha's Chapel Lot 4A, Jan 2024
Nest Horizon Depth(") Ksat (in/hr)
N4_NEW Bt 15 0.004
N5_NEW Bt 15 0.010
REVISED Geometric Mean Ksat:
Horizon Ksat (in/hr)
Bt 0.006

INFORMATION
SITE ID #
Lot 4A Nest 1
LOCATION COORDINATE SYSTEM
Date
1 /13/23
Measurement Conducted By
CM/SR
Job Name
Martha's Chapel Rd
Job Number
3928
Weather Condition
Temperature
Soil
Horizon
Bt
Source of Water
Depth of Hole
18
Radius of Hole
2.54
Initial Depth of Water in Hole (H)
15.24
cm
Final Depth of Water in Hole (H)
15.24
cm
Ratio H/r
6.0000
Start Saturation Time
Start of Steady -State Condition Time
No. of Reservoirs Used at Steady -State
1
A factor in Equation [21 of Manual
0.001127
Hole Depth: 18 45.72
H;: 6 15.24
Hf: 6 15.24
Clock
Time
Water Level
Reading
Time Interval Change in
Water Level
Flow Volume
Flow rate
Q
Flow rate
Q
Ksat
Ksat
Equivalent
Ksat
cm
Minute cm
cm3
cm3/min
cm3/hour
cm/hour
cm/day
d/sq. ft
9.33
6
Run 1
11.11
5.6
98.00 0.4
8
0.08
4.9
0.006
0.13
0.03
11.59
5.5
48.00 0.1
2
0.04
2.5
0.003
0.07
0.02
13.31
5.3
92.00 0.2
4
0.04
2.6
0.003
0.07
0.02
15.06
51
95.00 0.3
61
0.06
3.8
0.004
0.10
0.03
AVERAGE
c m/hr: 0.003
in/hr: 0.001

INFORMATION
SITE ID #
Lot 4A Nest 2
LOCATION COORDINATE SYSTEM
Date
1 /13/23
Measurement Conducted By
CM/SR
Job Name
Martha's Chapel Rd
Job Number
3928
Weather Condition
Temperature
Soil
Horizon
Bt
Source of Water
Depth of Hole
18
Radius of Hole
2.54
Initial Depth of Water in Hole (H)
15.24
cm
Final Depth of Water in Hole (H)
15.24
cm
Ratio H/r
6.0000
Start Saturation Time
Start of Steady -State Condition Time
No. of Reservoirs Used at Steady -State
1
A factor in Equation [21 of Manual
0.001127
Hole Depth: 18 45.72
H;: 6 15.24
Hf: 6 15.24
Clock
Time
Water Level
Reading
Time Interval Change in
Water Level
Flow Volume
Flow rate
Q
Flow rate
Q
Ksat
Ksat
Equivalent
Ksat
cm
Minute cm
cm3
cm3/min
cm3/hour
cm/hour
cm/day
d/sq. ft
9.40
13.6
11.15
12.1
95.00 1.5
30
0.32
18.9
0.021
0.51
0.13
12.01
11.3
46.00 0.8
16
0.35
20.9
0.024
0.56
0.14
12.49
10.5
48.00 0.8
16
0.33
20.0
0.023
0.54
0.13
13.29
9.81
40.00 0.7
14
0.35
21.0
0.024
0.57
0.14
AVERAGE
c m/hr: 0.023
in/hr: 0.009

INFORMATION
SITE ID #
Lot 4A Nest 3
LOCATION COORDINATE SYSTEM
Date
1 /13/23
Measurement Conducted By
CM/SR
Job Name
Martha's Chapel Rd
Job Number
3928
Weather Condition
Temperature
Soil
Horizon
Bt
Source of Water
Depth of Hole
18
Radius of Hole
2.54
Initial Depth of Water in Hole (H)
15.24
cm
Final Depth of Water in Hole (H)
15.24
cm
Ratio H/r
6.0000
Start Saturation Time
Start of Steady -State Condition Time
No. of Reservoirs Used at Steady -State
1
A factor in Equation [21 of Manual
0.001127
Hole Depth: 18 45.72
H;: 6 15.24
Hf: 6 15.24
Clock
Time
Water Level
Reading
Time Interval Change in
Water Level
Flow Volume
Flow rate
Q
Flow rate
Q
Ksat
Ksat
Equivalent
Ksat
cm
Minute cm
cm3
cm3/min
cm3/hour
cm/hour
cm/day
d/sq. ft
9.33
13.6
11.11
11.6
98.00 2
40
0.41
24.5
0.028
0.66
0.16
11.59
10.4
48.00 1.2
24
0.50
30.0
0.034
0.81
0.20
13.31
8.3
92.00 2.1
42
0.46
27.4
0.031
0.74
0.18
15.06
6.1
95.00 2.2
44
0.46
27.8
0.031
0.75
0.19
AVERAGE
c m/hr: 0.032
in/hr: 0.013

INFORMATION
SITE ID #
Lot 4A Nest 4, NEW
LOCATION COORDINATE SYSTEM
Date
1 /4/23
Measurement Conducted By
SST/SD
Job Name
Martha's Chapel Rd
Job Number
3928
Weather Condition
Temperature
Soil
Horizon
Bt
Source of Water
Depth of Hole
15
Radius of Hole
2.54
Initial Depth of Water in Hole (H)
15.24
cm
Final Depth of Water in Hole (H)
15.24
cm
Ratio H/r
6.0000
Start Saturation Time
Start of Steady -State Condition Time
No. of Reservoirs Used at Steady -State
1
A factor in Equation [21 of Manual
0.001127
Hole Depth: 15 38.1
H;: 6 15.24
Hf: 6 15.24
Clock
Time
Water Level
Reading
Time Interval
Change in
Water Level
Flow Volume
Flow rate
Q
Flow rate
Q
Ksat
Ksat
Equivalent
Ksat
cm
Minute
cm
cm3
cm3/min
cm3/hour
cm/hour
cm/day
d/sq. ft
10.18
45.2
12.15
45
117.00
0.2
4
0.03
2.1
0.002
0.06
0.01
12.45
44.9
30.00
0.1
2
0.07
4.0
0.005
0.11
0.03
13.14
44.8
29.00
0.1
2
0.07
4.1
0.005
0.11
0.03
13.44
44.7
30.00
0.1
2
0.07
4.0
0.005
0.11
0.03
14.14
44.3
30.00
0.4
8
0.27
16.0
0.018
0.43
0.11
14.46
44.1
32.00
0.2
4
0.12
7.5
0.008
0.20
0.05
15.16
43.9
30.00
0.2
4
0.13
8.0
0.009
0.22
0.05
15.45
43.7
29.00
0.2
4
0.14
8.3
0.009
0.22
0.06
16.14
43.5
29.00
0.2
4
0.14
8.3
0.009
0.22
0.06
- lAverage 0.009
AVERAGE
c m/hr: 0.009
in/hr: 0.004

INFORMATION
SITE ID #
Lot 4A Nest 5, NEW
LOCATION COORDINATE SYSTEM
Date
1 /4/23
Measurement Conducted By
SST/SD
Job Name
Martha's Chapel Rd
Job Number
3928
Weather Condition
Temperature
Soil
Horizon
Bt
Source of Water
Depth of Hole
15
Radius of Hole
2.54
Initial Depth of Water in Hole (H)
15.24
cm
Final Depth of Water in Hole (H)
15.24
cm
Ratio H/r
6.0000
Start Saturation Time
Start of Steady -State Condition Time
No. of Reservoirs Used at Steady -State
1
A factor in Equation [21 of Manual
0.001127
Hole Depth: 15 38.1
H;: 6 15.24
Hf: 6 15.24
Clock
Time
Water Level
Reading
Time Interval
Change in
Water Level
Flow Volume
Flow rate
Q
Flow rate
Q
Ksat
Ksat
Equivalent
Ksat
cm
Minute
cm
cm3
cm3/min
cm3/hour
cm/hour
cm/day
d/sq. ft
10.17
46.6
10.46
46
29.00
0.6
12
0.41
24.8
0.028
0.67
0.17
11.11
45.2
25.00
0.8
16
0.64
38.4
0.043
1.04
0.26
12.13
43.9
62.00
1.3
26
0.42
25.2
0.028
0.68
0.17
13.04
42.6
51.00
1.31
26
0.51
30.61
0.034
0.83
0.20
13.44
42
40.00
0.6
12
0.30
18.0
0.020
0.49
0.12
14.12
41.4
28.00
0.6
12
0.43
25.7
0.029
0.70
0.17
14.46
40.5
34.00
0.9
18
0.53
31.8
0.036
0.86
0.21
15.14
40
28.00
0.5
10
0.36
21.4
0.024
0.58
0.14
15.45
39.4
31.00
0.6
12
0.39
23.2
0.026
0.63
0.15
16.13
38.9
28.00
0.5
10
0.36
21.4
0.024
0.58
0.14
AVERAGE
c m/hr: 0.025
in/hr: 0.010

Project Name: Marthas Vineyard Way Lot 4A
Facility Address: Across from 1032 Martha's Chapel Rd.
Apex, NC 27523
County: Chatham County, NC
Prepared by: G. Christopher Murray, L.S.S.
Project Design Flow = 600 gal/day
# of Bedrooms
Required Flow
2 bedrooms
240gal/day
3 bedrooms
360 gal/day
4 bedrooms
480 gal/day
5 bedrooms
600 gal/day
6 bedrooms
720 gal/day
SFR-LRW 9-08

Project Name: Marthas Vineyard Way Lot 4A
Location of Temperature Data: RDU Int. Airport - Raleigh, NC
Starting Year of Data Record: 1948
Ending Year of Data Record: 2006
Period of Record (years): 58
Source of Data: State Climate Office of North Carolina
Site Latitude (degrees) 35.79 within range
Calculated PET: 33.45 inches
Mean Monthly
Temperature
(degrees F)
Daylight
Hours 112
Heat Index
Calculated
PET
(inches)
January
41.1
0.87
1.02
0.29
February
44.8
0.85
1.70
0.50
March
51.2
1.03
3.15
1.20
April
59.4
1.09
5.40
2.30
May
67.6
1.21
8.02
3.96
June
75.6
1.22
10.90
5.55
July
79.0
1.23
12.21
6.39
August
77.7
1.16
11.71
5.74
September
71.1
1.03
9.24
3.92
October
60.6
0.97
5.76
2.19
November
51.5
0.86
3.22
1.02
December
42.6
0.85
1.28
0.37
Tota 1 =
73.61
33.45
SFR-LRW 9-08

Project Name: Marthas Vineyard Way Lot 4A
Location of Precipitation Data: RDU Int. Airport - Raleigh, NC
Starting Year of Data Record: 1948
Ending Year of Data Record: 2006
Period of Record (years): 58
Source of Data: State Climate Office of North Carolina
80th Percentile Annual Precipitation: 54.48
Total =
Mean Monthly
Precipitation
%of Mean
Annual
Precipitation
80th
Percentile
Monthly
Precipitation
3.60
8.21
4.47
2.88
6.57
3.58
4.30
9.80
5.34
3.06
6.98
3.80
2.26
5.15
2.81
2.93
6.68
3.64
5.51
12.56
6.84
5.00
11.40
6.21
5.81
13.25
7.22
2.90
6.61
3.60
2.75
6.27
3.42
2.86
6.52
3.55
43.86
100.00
54.48
SFR-LRW 9-08

Project Name:
Marthas Vineyard Way Lot 4A
Annual Hydraulic
Design Flow =
600 gal/day Loading Rate = 18.67 inchlyr
SFR Loading Rate Group:
SFR-C
Limiting Soil Ksat =
0.006 inch/hour Irrigation Area = 18,815 square ft
Drainage Coefficient =
0.708 = 0.43194 acres
Drainage Rate= 0.1019952 inch/day (Formula:Ksar" Drainage Coefficient "24)
Number of Days
in the Month
PET m1moL
Vertical
Drainage
in/mo
80th Percentile
Monthly
Precipitation
in/mo
Maximum
Allowable
Irri ation in/mo
Maximum Allowable
Irrigation
allons/da
Maximum Allowable
Irrigation
allons/month
January
31
0.29
3.16
4.47
0.00
0
0
February
28
0.50
2.86
3.58
0.00
0
0
March
31
1.20
3.16
5.34
0.00
0
0
April
30
2.30
3.06
3.80
1.56
610
18,310
May
31
3.96
3.16
2.81
4.31
1,632
50,602
June
30
5.55
3.06
3.64
4.97
1,945
58,346
July
31
6.39
3.16
6.84
2.71
1,024
31,735
August
31
5.74
3.16
6.21
2.69
1,020
31,605
September
30
3.92
3.06
7.22
0.00
0
0
October
31
2.19
3.16
3.60
1.75
663
20,561
November
30
1.02
3.06
3.42
0.67
261
7,841
December
31
0.37
3.16
3.55
0.00
0
0
TOTAL = 365 33.45 37.23 54AB
Formulas: (Max. Allowable Irrigation) = (PET) + (Drainage) - (Precipitation)
SFR Loading Rate Table
SFR
Maximum Annual
Geometric Mean
Loading
Loading Rate
Ksar Range
Rate
(in/yr)
(in/hr)
Grou
Low - High
Low - High
SFR-A
26.0 - 50.0
>0.05
SFR-B
19.5 - 26.0
0.015 - 0.05
SFR-C
13.0 -19.5
0.003 - 0.015
SFR-D
0.0 -13.0
0.0 - 0.003
Assignmentto a SFR Loading Rate Group for each 15A NCAC 02T .0600 permit
application shall be determined by the geometric mean of insitu saturated
hydrualic conductivity data collected in the most restrictive horizon for each soil
mapping unit within the irrigation area.
18.67 7155.37 219,000
Required Flow
2 bedrooms
240gal/day
87,600 al/ r
3 bedrooms
360 gal/day
131,400 gal/yr
4 bedrooms
480 gal/day
175,200 gal/yr
5 bedrooms
600 gal/day
219,000 gal/yr
6 bedrooms
720 gal/day
262,800 gal/yr
Maximum allowable irrigation: 219,000 gal/yr
The Maximum Allowable Irrigation number must be greater
than or equal to the required flow.
SFR-LRW 9-08

Waypoel t
ANALYTICAL
Client :
Piedmont Enviromental Assoc., P. A.
216 South Swing Road
Suite 1
Greensboro INC 27310
Lab No: 22064
2850 Daisy Lane, Wilson, NC 27896
Main 252-206-1721 ° Fax [phone]
"Every acre... Every year®' www.waypointanalyrical.com
Grower : Report No:
PIEDMONT ENVIRONMENTAL Cust No:
Farm: MARTHA CHAPEL
Field:
Date Printed:
Date Received
PO:
Page
Sample ID: 4A
SOIL ANALYSIS
23-170-0524
06526
06/21/2023
06/19/2023
4 of 4
Test
Method
Results
SOIL TEST RATINGS
Calculated Cation
Exchange Capacity
w
Low
Medium
Optimum
Soil pH
1:1
4.4
Room
5.1 meq/100g
Buffer pH
BPH
6.61
%Saturation
Phosphorus (P)
M3
44 ppm
% sat meq
K 1.5 0.1
Ca 24.0 1.2
Mg 11.1 0.6
H 62.7 3.2
Na 1.2 0.1
Potassium (K)
M3
30 ppm
Calcium (Ca)
M3
245 ppm
Magnesium (Mg)
M3
68 ppm
Sulfur (S)
M3
10 ppm
Boron (B)
M3
0.1 ppm
Copper (Cu)
M3
0.3 ppm
Iron (Fe)
M3
156 ppm
K/Mg Ratio: 0.13 ❑
Ca/Mg Ratio: 2.16 ❑
Manganese (Mn)
M3
6 ppm
Zinc (Zn)
M3
1.7 ppm
Sodium (Na)
M3
14 ppm
liiiiiiiiiiii■
Soluble Salts
Organic Matter
LOI
0.3%
Estimated N Release
49 Ibs/acre
Nitrate Nitrogen
SOIL FERTILITY GUIDELINES
Crop :
Rec Units:
(Ibs) LIME (tons)
N
P205
K 20
Mg
S
B
Cu
Mn
Zn
Fe
Crop : Rec Units:
Comments :
M3 - Mehlich 3 BPH - Lime Index HIM - Humic Matter LOI - Loss On Ignition 1:1 -Water pH
Analysis prepared by: Waypoint Analytical Carolina, Inc.