HomeMy WebLinkAbout260007_POA for sludge reduction_20211020Appendix 1. Lagoon Sludge Survey Form
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:
Revised August 2008
Ray Bullard Farm
Ray Bullard Farm
Blake Moore
10/20/21
a. Distance from the lagoon liquid surface to the top of the sludge layer.
pole with disc
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b. Distance from the lagoon liquid surface to the bottom (soil) of the lagoon.
pole
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. Estimate number of sampling points:
a. Less than 1.33 acres: Use 8 points
b. If more than 1.33 ac.
acres x 6 = 12 , 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. Plumber the intersection points on the lanoon 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):
J. Determine the distance from the top of bank to the Maximum Liquid Level
(use lagoon management plan or other lagoon records)
K. Determine the distance from the Maximum Liquid to the Minimum Liquid level:
(use lagoon management plan or other lagoon records)
L. Calculate the distance from the present liquid surface level to the Minimum Liquid Level
(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)
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):
O. Record from the Sludge Survey Data Sheet the average thickness of the sludge layer:
P. Calculate the thickness of the existing Liquid Treatment Zone (Item N minus Item L):
Q. If Item 0 is greater than Item P, proceed to the Worksheet for Sludge Volume and Treatment Volume.
If Item 0 is equal to or less than Item P, you do not have to determine volumes.
Completed by: Blake Moore/Greer Moore
Print Name /Signature
Appendix 2. Sludge Survey Data Sheet* Revised August 2008
1.0
1.6
2.0
1.0
6.6
2.0
4.6
1.0
Date: 10/20/21
1
Lagoon Identification RBF
Completed by: Blake Moore
Print Name
Signature
Date:
10/20/21
(A)
Grid Point
No.
(B)
( C )
Distance from liquid surface
to lagoon bottom (soil)
(C)-(B)
Thickness of sludge layer
Distance from liquid surface
to top of sludge
Ft.
& in.
Ft. (tenths)
Ft. & in.
Ft. (tenths)
Ft. & in.
Ft. (tenths)
1
1.5
1.5
6
6.0
4.5
2
1.5
1.5
6
6.0
4.5
3
0.5
0.5
6.5
6.5
6.0
4
1.75
1.8
7.25
7.3
5.5
5
2
2.0
7
7.0
5.0
6
2.25
2.3
7
7.0
4.8
7
2
2.0
6.5
6.5
4.5
8
2
2.0
6.5
6.5
4.5
9
2.5
2.5
6
6.0
3.5
10
3
3.0
6
6.0
3.0
11
3
3.0
7
7.0
4.0
12
2.25
2.3
7
7.0
4.8
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
0.0
0.0
0.0
Number of points with readings
X X
X X
Average of
points
2.03
6.56
X X
4.55
At pump
intake
2.0
N/A
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.
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 3.5 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
2
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.
1. Average sludge Layer Thickness (T)
2. Depth of the lagoon from top of bank to bottom soil surface (D)
3. Slope = Horizontal/ vertical side slope (S)
4. Length at the top of inside bank (L)
5. Width at top inside slope (W)
6. Length at midpoint of sludge layer Lm = L-2S(D-(T/2))
7. Width at midpoint of sludge layer Wm= W-2S(D-(T/2))
8. Volume of sludge (Vs) Vs=Lm Wrn T
9. Volume in gallons: Vsg=V*7.5 gal./ft3.
10. Thickness of existing liquid tmt. zone (Y)
11. Thickness of total treatment zone (Z) Z= T+Y
12. Length at midpoint of total tmt. zone LZ = L-2(S)(D-(Z/2)
13. Width at midpoint of total tmt. Zone WZ = W-2(S)(D-(Z/2)
14. Volume of total treatment zone (Vz) Vz = LZ WZ Z
15. Ratio ( R ) of sludge layer volume to total Treatment Volume
R = VsNz
Example Your Lagoon
2.5 ft.
4.6 ft.
11 ft. 9.5 ft.
3 3.0
457 ft. 440.0 ft.
229 ft. 220.0 ft.
398.5 ft. 396.7 ft.
170.5 ft. 176.7 ft.
169,860 ft3 318,810 ft3
1,273,950 gal.
2,391,078 gal.
3.5 ft 1.0 ft
6 ft 5.6 ft
409 ft. 399.7 ft.
181 ft. 179.7 ft.
444,174 ft3 398,474 ft3
0.38 0.80
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 - 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 0.80
3
4/1 will be C Jos L)v �M-+
(eautski PLAN OF ACTION (POA) FOR LAGOON SLUDGE REDUCTION
6S
Facility Number: 4.26,z.)9 County:
/� Facility Name: 73//a GI r
Certified Operator Name: /'frk\esP �- Operator #:
f4 ZaU%•1
**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.
Lagoo 1
1 �, � I W y
Lagoon 2
Lagoon 3
Lagoon 4
Lagoon 5
Lagoon 6
a. Lagoon Name/ Identifier
b. Total Sludge Depth (ft)
r "�
2/. 5 3
c. Sludge Depth to be
Removed for Compliance
(ft)
alL410�''-
c (oS u�
, 4/.55-
d. Sludge Volume to be .
Removed (gallons)
AG,
(4 h'-14
,.
:,-
2_1 301 M
G„.'1 g
e. Sludge PAN
(lbs/1000 gal)
t6.0
f. Liquid PAN
(Ibs/100.0 gat)
, /. ''fr
�,
i
g. PAN of Sludge (Ibs)
(d x e)/1000 e.vl
5)
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
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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.
y v tom- cle.s4 s6-4- LA
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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. 1 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: / -.2_ 0~ a (
4 5 ,ed
'F Facility i ac ty Owner/Manager (print)
4ility wne 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
Compliance Due Date: /0 - 4.2b) - 23
Phone: 9 / — 303 3 "715—
Date: /1 — (9f
State Permitted Facilities
Return this form to:
NC Division of Water Resources
at the appropriate Regional Office
(see following page)
SPOA 9-15-2016 Page 2 of 3
DIVISION OF WATER RESOURCES REGIONAL OFFICES (09/2016)
Counties served by each Regional Office
Asheville Regional Supervisor
2090 U.S. Highway 70
Swannanoa, NC 28778
(828) 296-4500
Fax (828) 299-7043
Avery Macon
Buncombe Madison
Burke McDowell
Caldwell Mitchell
Cherokee Polk
Clay Rutherford
Graham Swain
Haywood Transylvania
Henderson Yancey
Jackson
<Fayetteville Regional Supervisor
225 Green Street, Suite 714
Fayetteville, NC 28301-5094
(910) 433-3300
Fax (910) 486-0707
Anson Moore
Bladen Richmond
um er and Robeson
Harnett Sampson
Hoke Scotland
Montgomery
Winston-Salem Regional Supervisor
450 Hanes Mill Road, Suite 300
Winston-Salem, NC 27105
(336) 776-9800
Fax (336) 776-9797
Alamance Rockingham
Alleghany Randolph
Ashe Stokes
Caswell Surry
Davidson Watauga
Davie Wilkes
Forsyth Yadkin
Guilford
Washington Regional Supervisor
943 Washington Square Mall
Washington, NC 27889
(252) 946-6481
Fax (252) 975-3716
Beaufort Jones
Bertie Lenoir
Camden Martin
Chowan Pamlico
Craven Pasquotank
Currituck Perquimans
Dare Pitt
Gates Tyrell
Greene Washington
Hertford Wayne
Hyde
Mooresville Regional Supervisor
610 East Center Avenue, Suite 301
Mooresville, NC 28115
(704) 663-1699
Fax (704) 663-6040
Alexander
Cabarrus
Catawba
Cleveland
Gaston
Iredell
Lincoln
Mecklenburg
Rowan
Stanly
Union
Raleigh Regional Supervisor
1628 Mail Service Center
Raleigh, NC 27699-1628
(919) 791-4200
Fax (919) 571-4718
Chatham Nash
Durham Northampton
Edgecombe Orange
Franklin Person
Granville Vance
Halifax Wake
Johnston Warren
Lee Wilson
Wilmington Region Supervisor
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
(910) 796-7215
Fax (910) 350-2004
Brunswick
Carteret
Columbus
Duplin
New Hanover
Onslow
Pender
SPOA 9-15-2016 Page 3 of 3