820620_Plan of Action_20200414

Appendix 1. Lagoon Sludge Survey Form
Revised August 2008
A. Farm Permit or DWQ Identification Number
B. Lagoon Identification
C. Person(s) Taking Measurements
D. Date of Measurement
E. Methods/Devices Used for Measurement of:
82-620
Ray McPhail (4-71
Alan Parham
4/1 /20
a. Distance from the lagoon liquid surface to the top of the sludge layer.
Sonar
b. Distance from the lagoon liquid surface to the bottom (soil) of the lagoon.
Previous Survey
c. Thickness of the sludge layer if making a direct measurement with "core sampler"
N/A
vec,01 )
APR 14 ItV
Gc pEa6%ce
entra� Off+
Lagoon Surface Area (using dimensions at inside top of bank): 0.9 (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
b. If more than 1.33 ac. 0.9 acres x 6 = 1345.0 , 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.
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): 0.3
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: 2.0
(use lagoon management plan or other lagoon records)
L. Calculate the distance from the present liquid surface level to the Minimum Liquid Level 1.7
(Item K Minus Item I, assuming the present liquid level is below the Maximum Liquid Level)
M. Record from the Sludge Surrey Data Sheet the distance from the present liquid surface level to the
lagoon bottom (average for all the measurement points) 10.3
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): 5.1
O. Record from the Sludge Survey Data Sheet the average thickness of the sludge layer: 5.2
P. Calculate the thickness of the existing Liquid Treatment Zone (Item N minus Item L): 3.4
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: Alan Parham 4;.�.. PO •' --_ _ Date: 04/01/20
Print Name /Signature

Appendix 2. Sludge Survey Data Sheet* Revised August 2008
Lagoon Identification: Ray McPhail (4-7)
Completed by: Alan Parham
Print Name
Signature
Date: 4/1 /20
(A)
fB) (C) fC)-(B)
Grid Point
Distance from liquid surface Distance from liquid surface Thickness of sludge layer
No.
to top of sludge to lagoon bottom (soil)
I Ft. & in.
Ft. (tenths)
Ft. & in.
Ft. (tenths)
Ft. & in.
Ft. (tenths)
1
2
Remote
3
Boat
4
1435 90'
5
Readings
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Number of points with readings
1345.0
X X
NA
X X
NA
Average of
X. X
5.1
X X
10.3
X X
5.2
}points
At pump X X
intake
4.1
X X X X X X
*All Grid Points and corresponding sludge layer thicknesses must be shown on a sketch attached to this
Sludge Survey Data Sheet.

Ray McPhail (4-7)
Appendix 3. Worksheet for sludge volume and treatment volume Revised August 2008 411/20
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 O and P, respectively). In this example, the average sludge
layer thickness is 2.5 feet and the existing liquid treatment zone is 3.5 feet. If the lagoon has a designed sludge storage volur
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 "Prismoidal Equations" may be used.
Example
Your Lagoon
1. Average sludge Layer Thickness (T)
2.5 ft.
5.2 ft.
2. Depth of the lagoon from top of bank to bottom soil surface (D)
11 ft.
12.2 ft.
3. Slope = Horizontal/ vertical side slope (S)
3
3.0
4. Length at the top of inside bank (L)
457 ft.
198.0 ft.
5. Width at top inside slope (W)
229 ft.
198.0 ft.
6. Length at midpoint of sludge layer Lm = L-2S(D-(T/2))
398.5 ft.
140.4 ft.
7. Width at midpoint of sludge layer Wm= W-2S(D-(T/2))
170.5 ft.
140.4 ft.
8. Volume of sludge (Vs) Vs=Lm Wm T
169,860 ft'
102,503 ft'
9. Volume in gallons: Vs9=V*7.5 gal./ft3.
1,273,950 gal.
768,774 gal.
10. Thickness of existing liquid tmt. zone (Y)
3.5 ft
3.4 ft
11. Thickness of total treatment zone (Z) Z= T+Y
6 ft
8.6 ft
12. Length at midpoint of total tmt. zone LZ = L-2(S)(D-(Z/2)
409 ft.
150.6 ft.
13. Width at midpoint of total tmt. Zone WZ = W-2(S)(D-(Z/2)
181 ft.
150.6 ft.
14. Volume of total treatment zone (Vz) Vz = LZ WZ Z
444,174 ft'
195,051 ft'
15. Ratio( R ) of sludge layer volume to total Treatment Volume
R = VsNz 0.38 0.53
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 ft?, then R = (169,860 - 85,000) / (447,174 - 85,000) = 84,860 / 362,174 = 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 0.53

PLAN OF ACTION (POA) FOR LAGOON SLUDGE REDUCTION
Facility Number: 82-620 County: Sampson
Facility Name: , Ray McPhail (4-7)
Certified Operator Name: _.-11,OMin46perator #:s 25 b
Note: A certified Sludge Management Plan may be submitted in lieu of this POA.
J Lagoon 1 I_La oon 2
a. Lagoon Name/ Identifier 1
Lagoon 3 La oon 4
L oon 5
Lanoon a
b. Total Sludge Depth (ft)
5.2
c. Sludge Depth to be
Removed for Compliance
.2
ft
d. Sludge Volume to be
Removed (gallons)
35,872
e. Sludge PAN
(Ibs/1000 gal)
12
f. Liquid PAN
(Ibs/1000 gal)
g. PAN of Sludge (Ibs)
(d x e)/1000
430
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
DWO within 180 days. Workto reduce the sludge level must begin within another 180 days.
Compliance with NRCS Standard 359 must be achieved by the expiration date of the current permit, July
1, 2007,
If the sludge level is non -compliant, but below the stop pump level of the lagoon, compliance with NRCS
Standard 359 must be achieved by the expiration date of the current permit, July 1, 2007. If future
sludge surveys do not show improvement in sludge levels, DWO may require the owner to develop a
sludge management plan that meets the requirements of SB Interagency Group Guidance Document
1.26.
SPOA 5-18-04 Page 1 of 2

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.
Sludge Management/Operation Plan
Sludge Management Guide
Lagoon evaluation data developed by NCSU and a review of lagoon management records of several lagoons
showed that treatment capacity of the swine lagoons evaluated in NC was not significantly adversely affected
by sludge accumulations of 50% or more of the planned treatment volume of the lagoon . Therefore it is felt
that It Is permissible to allow sludge accumulation Into the planned treatment zone of properly monitored and
managed lagoons provided that:
• Nutrient values of the lagoon effluent are within the normal operating range.
• Then: is no noticeable increase In lagoon odor.
• Nutrients land applied from the lagoon are properly accounted for In the application plan (WUP)
Sludge Management
Sludge in my lagoon will be managed by the following
• Adequately monitor to define sludge volume, location, and rate of accumulation by conducting an
annual sludge survey,
• Maintain a minimum 2.5 feet deep zone, free of sludge at the pump intake during irrigation.
• Position the pump intake and manage the Irrigation operation such that the material Irrigated is not
more concentrated than the nutrient analysis samples.
• Sufficient monitoring to address concerns that nutrients are not over applied.
• Other items as required by DWO.
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.
_t hart4, ,_ dy1'ZAI A irI Phone: D �(a-7- &2q4
Facility Owner/Manager (print)
L141�caw` Date: - ® (o - 2-C)
Facility Own r/Manager (signature)
Return this form to:
NC Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
SPOA 5-18-04 Page 2 of 2