Liquid Depth (inches)	Barrels	Air Gap (inches)
3	3.4	117
6	9.6	114
9	17.6	111
12	27	108
15	37.6	105
18	49.1	102
21	61.5	99
24	74.7	96
27	88.5	93
30	103	90
33	117.9	87
36	133.3	84
39	149.1	81
42	165.2	78
45	181.6	75
48	198.3	72
51	215.1	69
54	232.1	66
57	249.1	63
60	266.2	60
63	283.3	57
66	300.4	54
69	317.4	51
72	334.2	48
75	350.8	45
78	367.3	42
81	383.4	39
84	399.2	36
87	414.6	33
90	429.5	30
93	443.9	27
96	457.8	24
99	470.9	21
102	483.3	18
105	494.9	15
108	505.8	12
111	514.8	9
114	522.8	6
117	529.1	3
120	532.5	0