310438_Sludge Survey (Reporting)_20240129

PLAN OF ACTION(POA)FOR LAGOON SLUDGE REDUCTION
Facility Number AWS310438 County Dupiin
Facility Name: Bill Costin 1-4 Farm
Certified Operator Name: William J Costin,JR v Operator#: AWA19638
La oon 1 Lagoon 2 La oon 3 Lagoon 4 La oon 5 La oon 6
a_Lagoon Name/Identifier
b.Total Sludge Depth(ft) 14' 3
c. Sludge Depth to be Removed for
Compliance i
d.Sludge Volume to be Removed 2 c n G•Z
(gallons) D '7 D
e.Sludge PAN()1bs/1000 gal) NIA
F.Liquid PAN (Ibs/1000 al) N/A
�g.PAN of Sludge(Ibs)(d x e)/1000
RECEIVED
JAN 3 0 2024
IVC DEGUDVVR
Centtal mice

-V-- A l+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.
-plans w-ems. -�'e�- Ca`/on Cvc.1/-E
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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: d 1 3 Compliance Due Date: l "G _
Phone: G'i C) . 2,S 51
Facility Owner/Manager(print)
Date:
Facility wn rlMana r(signature)
Return this form to:
Animal Feeding Operations Unit RECEYM
NC Division of Water Resources
1636 Mail Service Center
Raleigh, NC 27699-1636 JANI Q rm24
NO UEQ/DWfi
SPOA 3-22-2010 Page 2 of 2 Central Office

1,-
Appendix 1.Lagoon Sludge Survey Form Revised August 2008
A.Farm Permit or DWQ Identification Number �y j
B.Lagoon Identification
C.Person(s)Taking Measurements � J C o i 77 k- # 'e
D.Date of Measurements
E.Methods/Devices Used for Measurement of: —` 1
a.Distance from the lagoon liquid surface to the top of the sludge layer:
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":
F.Lagoon Surface Area(using dimensions at inside top of bank): `, (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. Esti number of sampling points:
r ess than 1.33 acres:Use(8oints
b.If more than 1.33 acres, 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 measurement 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 sludge survey,,also measure the distance from the Maximum Liquid Level to the Present /
Liquid Level(measure at the lagoon gauge pole):_jam f u�
J. Determine the distance from the top of bank to the Maximum Liquid Level q
(use lagoon management plan or other lagoon records)
K. Determine the distance from the Maximum Liquid Level to the Minimum Liquid Level r
(use lagoon management plan or other lagoon records)
}
L. Calculate the distance from the present liquid surface level to the Minimum Liquid Level 5
(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): 7.""''
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): a 1
U. Vr
O. Record from the Sludge Survey Data Sheet the average thickness of the sludge layer: _
P. Calculate the thickness of the existing Li uid Treatment Zone(Item N minus Item L):
Q. If Item 0 is Brea than;item P,proce o the Wor�csheet for Sludge Volume and Treatment Volume.
If Item ual to or lessthmr'Iiem P,you do not have to determine_v014mes.
DateCompletedby
Print Name Signature DECEIVE®
JAN 3 0 2024
NC DEQ/DWR
Central Office

T
Appendix 2.Sludge Survey Data Sheet* Revised August 2008
Lagoon Identification:
Completed by: _ J t ... ` ->� .r- Date:
Print Name Signature
(A) (B) (C) (C)minus (B)
Grid Distance from liquid Distance from liquid surface Thickness of sludge layer
Point surface to top of sludge to lagoon bottom (soil)
No.
Ft.&in. Ft.(tenths) Ft&in. Ft. tenths Ft.&in. Ft. tenths
2
4 ° •� ,
5
Q C
7 '
8
9
10 i
11
12 l
13
14
15
16
17
18
19
20
21
22
23
24
Number of points with 1 X X
readings �C
Average
Of
points '
At
pump X X X X
intake
*All Grid Points and corresponding sludge layer thick es m be shown on a sketch attacbed
to this Sludge Survey Data Sheet. See Appendix 4 for fivers i,from inches to tenths of a foot. UVE®
3 0 2024
NC DEQ/DWR
�- Central Office
/j
s '

Y
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 Iiquid(sludge-free)treatment
zone(are determined from 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 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
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. t
Example Your lagoon
L Average Sludge Layer Thickness(T) 2.5 ft.
2. Depth of lagoon from top of bank
to bottom soil surface(D). 11 ft. 00 /1 ,
3. Slope=horizontal/vertical side slope (S) 3 2�
4. Length at top inside bank(L) 457 ft. 6)
5. Width at top inside bank(W) 229 ft. ) -7 a
6. Length at midpoint of sludge layer �f
L,,,=L-2 S (D-(T/2)) 3985 ft.
7. Width at midpoint of sludge layer 1--7
W.=W-2 S(D-(T/2)) 170.5 ft.
8. Volume of sludge(Vs):
Vs=Lm Wm T 169,860 ft3 1 I L4, G 3 L,
9. Volume in gallons:
Vsg=V*7.5 gal./fO. 1,273,950 gal. - �^
10. Thickness of existing liquid tmt.Zone (Y} 3.5 ft. ,
11. Thickness of total treatment zone(Z) 6.0 ft. -q, `I `f
Z=T+Y
(Appendix 3 continued on next page) � C�l
324
C DEq/DWFt
Central Office

Revised August 2008
Appendix 3. Worksheet for sludge volume and treatment volume(continued)
12.Length at midpoint of total tint.zone 409 ft. � JF ` ' z- a Cn d f_
Lz=L-2(S)(D-(Z/2)
13. Width at midpoint of total tmt.zone 181 ft.
Wz=W-2(S)(D-(Z/2) I -7 0
14.Volume of total treatment zone(Vz) 444.174 ft' }o "'.�`
Vz=Lz WzZ
15. Ratio(R)of sludge layer volume to total r ''
Treatment volume
R=Vs/Vz 0.38
If the ratio exceeds 0.50,than a sludge Plan of Action may be required. Check with
DWQ for information on filing the Plan of Action.
J
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 (Vzj(Item
14),and take the ratio:
R=(Vs—DSSV)/(Vz—DSSV)
Example: If DSSV= 85,000 ft3,then R=(169,860-85,000)/(444,174-85,000)
R=84,860/ 359,174=0.24
Appendix 4. Conversion table from inches to tenths of a foot.
Inches Tenths of Inches Tenths of
foot foot
1 0.1 7 10.6
2 0.2 8 10.7 RECEI
3 0.2 9 1 0.7
4 0.3 10 0.8 JAN 3 0 2024
5 0.4 11 0.9
5 D
0.5 iW E-QIDWR
Central Office