090073_SSE letter_20201030

Sludge Survey Evaluation Form
Today's Date10/30/2020Today's Date10/30/2020
Facility #
090073090073
Owner:
Sir GeorgeGreen Sea
Lagoon ID11
Sludge Survey Received:9/23/20209/23/2020
Sludge Survey Performed:2/22/20192/22/2019
Sludge Depth (Row O): (ft)
1.71.4
Existing Treatment Depth (Row P): (ft)
5.405.90
Start Date:01/01/9201/01/93
Facility age at time of survey:(yr)2726
Average Sludge Accumulation (ft/yr):0.060.05
55
Requested Extension: (yr)
Requested Due Date20252025
Sludge Accumulation during extension period: (ft)0.310.27
5.095.63
Treatment Depth Available after Extension: (ft)
Sludge level OK?YESYES
Ratio Estimates Based on DepthEXISTINGEXEMPTIONEXISTINGEXEMPTION
Ratio of Sludge layer to total trmt depth
0.240.280.190.23
Ratio of Sludge depth OK?YESYES
EXISTINGEXEMPTIONEXISTINGEXEMPTION
Average Sludge layer thickness (T)1.72.011.41.67
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)
5.405.095.905.63
Lm
Length at midpoint of sludge layer ()=L-2S(D-(T/2))
319.50320.44318.60319.40
Wm
Width at midpoint of sludge layer ()=W-2S(D-(T/2))
119.50120.44118.60119.40
Vs
Volume of sludge ()=Lm*Wm*T
64906.4377686.0052900.3463598.05
Vsg
Volume in gallons ()=Vs*7.481
485564.97581091.26395747.47475713.44
Z
Thickness of total treatment zone ()=T+Y
7.107.107.307.30
Lz
Length at midpoint of total treatment zone ()=L-2(S)(D-(Z/2))
335.70335.70336.30336.30
Wz
Width at midpoint of total treatment zone ()=W-2(S)(D-(Z/2))
135.70135.70136.30136.30
Vz
Volume of total treatment zone ()=Lz*Wz*Z
323436.88323436.88334615.14334615.14
Ratio(R) of sludge layer volume to total trmt volume0.2010.2400.1580.190
Sludge Volume Ratio OK?YESYES
Maximum extension until end of permit cycle
Next survey to be done: (calendar yr)
12/31/202512/31/2025
Notification letter mailed:
10/30/202010/30/2019