670038_Report_20180216

Feb 161810.33a Northwest Onslow Water 910-324-2323 p.1
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Feb 16 18 10'33a Northwest Onslow Water
k Fenn Permit or DWQ Identification Number
910324-2323
p.2
B. Lagoon Identification
C. Person(s) Taking Measurements
D. Dale of Measurement
E. Methodst0evices Used for Measurement of:
�'t•J 1��trT�F Mc�n
la-a3- n
S. Distance from the lagoon liquid surface to the top of the sludge layer.
Sonar `' rSL-
b. Distance from the lagoon liquid surface to the bottom jsoll) of the-
c. I tuckness of the sludge layer if making a direct measurement with "core sampler".
WA
L 66Qp � 6 ZO16
F. Lagoon Surface Area (using dimensions at inside top of bank): 3. q (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 numbei of sampling points
a. Less than 1.33 acres: Use 8 points
b. If more than 1.33 ac , y acres x 8 = 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 gnd 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 roar): this must be at least 2.5 ft. when Irrigating.
1. 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): !Ai
J. Determine the distance from the top of bank to the Maximum Liquid Level � U,
(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): [p. Oq
O. Record from the Sludge Survey Data Sheet the average thickness of the sludge layer. 1-�),53
P. Calculate the thickness of the existing Liquid Treatment Zone ( Item N minus Rem I-): 5. qx
O. If Item O Is greater than Item P, proceed to the Worksheet for Sfudge Volume and Treatment Volume.
If Item O is equal to or less than Item P, you do not have to determine volumes.
Completed by:
Date: 1ol -013-1

Feb 16 18 10,33a
Northwest Onslow Water
Distance from
liquid surface to
Grid Point
Water Depth
top of sludge
1
4,
2
OJ
4
%
C
3��Mlrm
Pzo
V(� V/7
�i� ulz vr3 �i�l �s
kloO yr �e kb
910-324-2323
of sludge (Additional Information
Farm Nam:
Awe
We:
IQ-,Q 1-7
ID:
Top Of Dike Elevation
Feet
Bottom Of Dike Elevation
Feet
Start Pump Level:
Feet
Stop Pump Level:
Feet
Current Freeboard:
4 a lnet+es
Top Of Dike Lengtle
signetrae of Person
Completlng Survey.
r: AN Grid Point
saremerds an In feet
p.3