MIL-HDBK-1005/9A
Use 10 ft [3.05 m] depth per guidelines:
65,508 ft3/10 ft = 6,551 ft2 surface area
[1,855 m3/3.05 m = 608 m2 surface area]
Use 3:1 length to width ratio per guidelines
6,551 ft2 [608 m2]
(3w)(w)
=
w2
2,183.6 ft2 [202.7 m2]
=
w
=
46.7 ft [14.2 m]
Try 50 ft [15.2 m] width and try LET size.
50 ft [15.2 m] x 150 ft[45.7 m] x 10 ft[3.05 m] deep
Check total volume and freeboard at 7-day oily waste
volume:
(50 ft)(150 ft)(10 ft)(7.48 gal/ft3) = 561,000 gallons
[(15.2 m)(45.7 m)(3.05 m)(1000 L/m3)= 2,123,609 L
Freeboard volume =
561,000 - 490,000 = 71,000 gallons
[2,123,609 L - 1,854,852 L] = 268,757 L
LET Volume per foot [meter] of depth =
(50 ft)(150 ft)(1 ft)(7.48 gal/ft3) = 56,100 gal/ft
[(15.2 m)(45.7 m)(1 m)(1000 L/m3)= 694,640 L/m]
Freeboard available:
71,000 gal/56,100 gal/ft = 1.26 ft = 15 in.
[268,757 L/694,640 L/m = 0.384 m = 1.26 ft = 15 in.]
Therefore, use LET size 50 feet wide by 150 feet long
by 10 feet deep.
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