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Sludge Survey Evaluation Form
Today's Date10/30/2020Today's Date10/30/2020
Facility #
310165310165
Owner:
S. Grady 3,4,5S. Grady 3,4,5
Lagoon ID4A4B
Sludge Survey Received:9/23/20209/23/2020
Sludge Survey Performed:7/24/20197/24/2019
Sludge Depth (Row O): (ft)
4.80.9
Existing Treatment Depth (Row P): (ft)
6.702.90
Start Date:06/01/9101/02/00
Facility age at time of survey:(yr)28120
Average Sludge Accumulation (ft/yr):0.170.01
11
Requested Extension: (yr)
Requested Due Date20212021
Sludge Accumulation during extension period: (ft)0.170.01
6.532.89
Treatment Depth Available after Extension: (ft)
Sludge level OK?YESNO
Ratio Estimates Based on DepthEXISTINGEXEMPTIONEXISTINGEXEMPTION
Ratio of Sludge layer to total trmt depth
0.420.430.240.24
Ratio of Sludge depth OK?NOYES
EXISTINGEXEMPTIONEXISTINGEXEMPTION
Average Sludge layer thickness (T)4.84.970.90.91
Depth of the lagoon from top of bank to bottom soil surface (D)
10.110.110.110.1
Slope=Horizontal/vertical side slope (S)
3333
Length at the top of inside bank (L)
375375375375
Width at the top inside slope (W)
175175175175
Thickness of existing liquid treatment zone (Y)
6.706.532.902.89
Lm
Length at midpoint of sludge layer ()=L-2S(D-(T/2))
328.80329.31317.10317.12
Wm
Width at midpoint of sludge layer ()=W-2S(D-(T/2))
128.80129.31117.10117.12
Vs
Volume of sludge ()=Lm*Wm*T
203277.31211659.0433419.1733707.40
Vsg
Volume in gallons ()=Vs*7.481
1520717.571583209.63250008.80252131.33
Z
Thickness of total treatment zone ()=T+Y
11.5011.503.803.80
Lz
Length at midpoint of total treatment zone ()=L-2(S)(D-(Z/2))
348.90348.90325.80325.80
Wz
Width at midpoint of total treatment zone ()=W-2(S)(D-(Z/2))
148.90148.90125.80125.80
Vz
Volume of total treatment zone ()=Lz*Wz*Z
597438.92597438.92155745.43155745.43
Ratio(R) of sludge layer volume to total trmt volume0.3400.3540.2150.216
Sludge Volume Ratio OK?YESYES
Maximum extension until end of permit cycle
Next survey to be done: (calendar yr)
12/31/202412/31/2024
Notification letter mailed:
4/12/20194/12/2019
EXEMPTION
EXEMPTION