HomeMy WebLinkAbout980009_Sludge Survey_20230627Appendix 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:
Chris Smith
6/27/2023
a. Distance from the lagoon liquid surface to the top of the sludge layer.
PVC Pipe
b. Distance from the lagoon liquid surface to the bottom (soil) of the lagoon.
PVC Pipe
c. Thickness of the sludge layer if making a direct measurement with "core sampler".
PVC Pipe
F. Lagoon Surface Area (using dimensions at inside top of bank): 3.6 (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. 3.6 acres x 6 = 22 , 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): 0.4
J. Determine the distance from the top of bank to the Maximum Liquid Level 2.0
(use lagoon management plan or other lagoon records)
K. Determine the distance from the Maximum Liquid to the Minimum Liquid level: 1.0
(use lagoon management plan or other lagoon records)
L. Calculate the distance from the present liquid surface level to the Minimum Liquid Level 1.6
(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) 9.3
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): 3.4
O. Record from the Sludge Survey Data Sheet the average thickness of the sludge layer: 5.9
P. Calculate the thickness of the existing Liquid Treatment Zone (Item N minus Item L): 1.8
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: NRCS Engineer Chris Smith Date: 6/27/2023
Print Name /Signature
Appendix 2. Sludge Survey Data Sheet* Revised August 2008
Lagoon Identification_ BNJ 1
Completed by: Josh Pate
Print Name
Signature
Date: 6/27/2023
(A)
( B )
( C )
( C ) - ( B )
Grid Point
Distance from liquid
surface
Distance from liquid surface
Thickness
of sludge layer
No.
to
top of sludge
to lagoon bottom (soil)
Ft.
& in.
Ft. (tenths)
Ft.
& in.
Ft. (tenths)
Ft.
& in.
Ft. (tenths)
1
4
0
4.0
9
6
9.5
5
6
5.5
2
4
6
4.5
9
6
9.5
5
0
5.0
3
7
0
7.0
9
0
9.0
2
0
2.0
4
3
0
3.0
9
0
9.0
6
0
6.0
5
2
0
2.0
9
0
9.0
7
0
7.0
6
4
0
4.0
9
0
9.0
5
0
5.0
7
1
6
1.5
9
6
9.5
8
0
8.0
8
4
0
4.0
9
6
9.5
5
6
5.5
9
2
6
2.5
9
6
9.5
7
0
7.0
10
1
0
1.0
9
0
9.0
8
0
8.0
11
0
0
0.0
0
0
0.0
0
0
0.0
12
0
0
0.0
0
0
0.0
0
0
0.0
13
0
0
0.0
0
0
0.0
0
0
0.0
14
0
0
0.0
0
0
0.0
0
0
0.0
15
0
0
0.0
0
0
0.0
0
0
0.0
16
0
0
0.0
0
0
0.0
0
0
0.0
17
0
0
0.0
0
0
0.0
0
0
0.0
18
0
0
0.0
0
0
0.0
0
0
0.0
19
0
0
0.0
0
0
0.0
0
0
0.0
20
0
0
0.0
0
0
0.0
0
0
0.0
21
0
0
0.0
0
0
0.0
0
0
0.0
22
0
0
0.0
0
0
0.0
0
0
0.0
23
0
0
0.0
0
0
0.0
0
0
0.0
24
0
0
0.0
0
0
0.0
0
0
0.0
Points
10
10
10.0
10
10
10.0
10
10
10.0
Average of
points
3.35
0
9.25
X
X
5.9
At pump
3.0
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.