820096_Sludge Survey POA_20231016

PLAN OF ACTION (POA) FOR LAGOON SLUDGE REDUCTION
Facility Number: 82-96 County: Sampson
Facility Name: Michael Matthis Farm
Certified Operator Name: Michael Monroe Matthis Operator #: 1007363
"Attach a copy of Lagoon Sludge Survey Form and volume worksheets
Note: A certified Sludge Management Plan may be submitted in lieu of this POA.
La oon 1
Lagoon 2
Lagoon 3
Lagoon 4
Lagoon 5
Lagoon 6
a. Lagoon Name/ Identifier
Lagoon #1
b. Total Sludge Depth (ft)
5.6 ft
c. Sludge Depth to be
Removed for Compliance
1.1 ft
ft
d. Sludge Volume to be
Removed (gallons)
500,000
e. Sludge PAN
(Ibs/1000 gal)
10 Ibs/1000g
.
f. Liquid PAN
(Ibs/1000 gal)
1.19lb/1000g
g. PAN of Sludge (Ibs)
(d x e)/1000
5,000 Ibs
Compliance Timeframes:
If the sludge level is equal to or higher than the stop pump level of the lagoon or if the sludge level
results in an elevated waste analysis, a sludge management plan that meets the requirements of SB
Interagency Group Guidance Document 1.26 must be prepared by a technical specialist and submitted to
DWR within 90 days. Work to reduce the sludge level must begin within another 180 days. Compliance
with NRCS Standard 359 must be achieved within two years of the original sludge survey.
If the sludge level is non -compliant but below the stop pump level of the lagoon, a POA must be filed
within 90 days and compliance with NRCS Standard 359 must be achieved within two years of the
original sludge survey indicating non-compliance. If future sludge surveys do not show improvement in
sludge levels, DWR may require the owner to develop a sludge management plan that meets the
requirements of SB Interagency Group Guidance Document 1.27.
SPOA 9-15-2016 Page 1 of 3

NARRATIVE: Use this section to describe the method(s) that will be used to lower the sludge
depth. If microbe use is planned, specify the product to be used.
I hereby certify that I have reviewed the information listed above and included within the attached
Plan of Action, and to the best of my knowledge and ability, the information is accurate and
correct. I further certify and acknowledge that compliance with regard to sludge accumulation
must be achieved within two years of the original sludge survey indicating non-compliance.
Sludge Survey Date:
10/16/2023
Michael Matthis
Facility Owner/Manager (print)
A14;
Facility Owner/Manager (signature)
NPDES Permitted Facilities
Return this form to:
Animal Feeding Operations Program
NC Division of Water Resources
1636 Mail Service Center
Raleigh, NC 27699-1636
SPOA 9-15-2016 Page 2 of 3
Compliance Due Date: 10/16/2025
910-990-9610
10/30/2023
State Permitted Facilities
Return this form to:
NC Division of Water Resources
at the appropriate Regional Office
(see following page)

Appendix 1. Lagoon Sludge Survey Form Revised August 2008
A. Farm Permit or DWQ Identification Number Michael Matthis 82-96
B. Lagoon Identification Lagoon 1
C. Person(s) Taking Measurements Max Knowles
D. Date of Measurement 1011
E. Methods/Devices Used for Measurement of:
a. Distance from the lagoon liquid surface to the top of the sludge layer.
Depth Sonar
b. Distance from the lagoon liquid surface to the bottom (soil) of the lagoon.
c. Thickness of the sludge layer if making a direct measurement with "core sampler".
NIA
F. Lagoon Surface Area (using dimensions at inside top of bank): 2.2 (acres)
(Draw a sketch of the lagoon on a separate sheet, list dimensions, and calculate surface area. The lagoon
may have been built different than designed, so measurements should be made.)
G. Estimate number of sampling points:
a. Less than 1.33 acres: Use 8 points >24
b. If more than 1.33 ac. acres x 6 = , with maximum of 24.
(Using sketch and dimensions, develop a uniform grid that has the same number of intersections as the
estimated number of sampling points needed. Number the Intersection points on the lagoon grid so that data
recorded at each can be easily matched.)
H. Conduct sludge survey and record data on "Sludge Survey Data Sheet" (Appendix 2). Also, at the
location of the pump intake, take measurements of distance from liquid surface to top of sludge
layer and record it on the Data Sheet (last row); this must be at least 2.5 ft. when irrigating.
I. At the time of the survey, also measure the distance from the Maximum Liquid Level to the Present Liquid
Level (measure at the lagoon gauge pole): 0.1
J. Determine the distance from the top of bank to the Maximum Liquid Level 1.6
(use lagoon management plan or other lagoon records)
K. Determine the distance from the Maximum Liquid to the Minimum Liquid level: 2.2
(use lagoon management plan or other lagoon records)
L. Calculate the distance from the present liquid surface level to the Minimum Liquid Level 2.1
(Item K Minus Item I, assuming the present liquid level is below the Maximum Liquid Level)
M. Record from the Sludge Survey Data Sheet the distance from the present liquid surface level to the
lagoon bottom (average for all the measurement points) 10.4
N. Record from the Sludge Survey Data Sheet the distance from the present liquid surface level to the top
of the sludge layer (average for all the measurement points): 4.8
O. Record from the Sludge Survey Data Sheet the average thickness of the sludge layer: 5.6
P. Calculate the thickness of the existing Liquid Treatment Zone (Item N minus Item L): 2.7
Q. If Item O is greater than Item P, proceed to the Worksheet for Sludge Volume and Treatment Volume.
If Item O is equal to or less than Item P, you do not have to determine volumes.
Completed by: / "v"" ` '----- Date: 10/16/23
Print Name /Siena ure

Appendix 2. Sludge Survey Data Sheet* Revised August 2008
Lagoon I
Completed by: Max Knowles
Print Name
Signature
Date:
(A)
( B )
( C )
( C ) - ( B )
Grid Point
Distance from liquid surface
Distance from liquid surface
Thickness of sludge layer
No.
to top of slud a
to lagoon bottom soil
Ft. & in.
Ft. tenths
Ft. & in.
Ft. tenths
Ft. & in.
Ft. tenths
1
0.0
0.0
0.0
2
0.0
0.0
0.0
3
0.0
0.0
0.0
4
0.0
0.0
0.0
5
>24 Readings
0.0
0.0
0.0
6
0.0
0.0
0.0
7
0.0
0.0
0.0
s
0.0
0.0
0.0
9
0.0
0.0
0.0
10
0.0
0.0
0.0
11
0.0
0.0
0.0
12
0.0
0.0
0.0
13
0.0
0.0
0.0
14
0.0
0.0
0.0
15
0.0
0.0
0.0
16
0.0
0.0
0.0
17
0.0
0.0
0.0
18
0.0
0.0
0.0
19
0.0
0.0
0.0
20
0.0
0.0
0.0
21
0.0
0.0
0.0
22
0.0
0.0
0.0
23
0.0
0.0
0.0
24
1
1 0.0
1
0.0
0.0
Number of points with readings
X X
X X
Average of
X X
X X
X X
points
At pump
4.5
4.5
X X X X X X
intake
*All Grid Points and corresponding sludge layer thicknesses must be shown on a sketch attached to this
Sludge Survey Data Sheet.
Appendix 3. Worksheet for sludge volume and treatment volume Revised August 2008
The average thickness of the sludge layer and the thickness of the existing liquid (sludge -free) treatment zone are determined
from the Information on the Lagoon Sludge Survey Form ( Items 0 and P, respectively). In this example, the average sludge

layer thickness is 2.5 feet and the existing liquid treatment zone is 3.6 feet. If the lagoon has a designed sludge storage volume,
see notes at end of the worksheet. The dimensions of the lagoon as measured and the side slope are needed
for calculations of sludge volume and of total treatment volume. If the lagoon is a standard geometric shape, the sludge
volume and the treatment volume in the lagoon can be estimated by using standard equations. For approximate volumes
of rectangular lagoons with constant side slope, calculate length and width at the midpoint of the layer, and multiply by layer
thickness to calculate layer volume, as shown in the example. For Irregular shapes, convert the total surface area to a square
or rectangular shape. For exact volumes for lagoons with constant side slope, the "Prismoidai Equations" may be used.
Example
Your lagoon
1. Average sludge Layer Thickness (1)
2.5
ft.
5.6
ft.
2. Depth of the lagoon from top of bank to bottom soil surface (D)
11
ft.
12.1
ft.
3. Slope = Horizontal/ vertical side slope (S)
3
3.0
4. Length at the lop of inside bank (L)
457
ft.
530.0
ft.
5. Width at top inside slope (W)
229
ft.
180.0
ft.
6. Length at midpoint of sludge layer L.= L-2S(D-(T/2))
398.5
ft.
474.2
ft.
7. Width at midpoint of sludge layer Wm W-2S(D-(T/2))
170.5
ft.
124.2
ft.
8. Volume of sludge (Vs) Vs=Lm Wm T
169,860
ft3
329,816
ft3
9. Volume in gallons: Vs9=V`7.5 gal./ft3.
1,273,950
gal.
2,473,617
gal.
10. Thickness of existing liquid tmt. zone (Y)
3.5
ft
2.7
ft
11. Thickness of total treatment zone (Z) Z= T+Y
6
ft
8.3
ft
12. Length at midpoint of total tmt. zone L. L-2(8)(D-(712)
409
ft.
482.3
ft.
13. Width at midpoint of total tmt. Zone W. = W-2(S)(D-(Z12)
181
ft.
132.3
ft.
14. Volume of total treatment zone (Vz) Vz = L� WIZ
444,174
ft3
529,609
ft3
15. Ratio ( R ) of sludge layer volume to total Treatment Volume
R = Vs/Vz 0.38 0.62
If the ratio R exceeds 0.50, than a sludge Plan of Action may be required. Check with DWQ for information
on filing the Plan of Action.
Note: If the lagoon has a designed sludge storage volume (DSSV), subtract that volume from both the volume
of sludge (Vs) (Item 8) and from the volume of total treatment zone (Vz) (Item 14), and take the ratio.
Then, R = (Vs-DSSV) / (Vz - DSSV)
Example: if DSSV = 85,000 ft3, then R = (169,860 - 86,000) / (444,174 - 85,000) = 84,860 / 359,174 = 0.24.
16. Design sludge storage volume (DSSV) 85,000
17. Ratio (R) of sludge layer volume to treatment volume adjusted
for designed sludge storage volume 0.24 0.62