For Thermal Req refer  below to

Table 1 Requirements for Thermal Venting Capacity

Column 1
Column 2
Column 3
Column 4
Tank Capacity
Inbreathing
Flash Pt > 100F
Flash Pt < 100F
BBLS
Gallons
Vaccuum
BP > 300F
BP < 300F
60
2500
60
40
60
100
4200
100
60
100
500
21000
500
300
500
1000
42000
1000
600
1000
2000
84000
2000
1200
2000
3000
126000
3000
1800
3000
4000
168000
4000
2400
4000
5000
210000
5000
3000
5000
10000
420000
10000
6000
10000
15000
630000
15000
9000
15000
20000
840000
20000
12000
20000
25000
1050000
24000
15000
24000
30000
1260000
28000
17000
28000
35000
1470000
31000
19000
31000
40000
1680000
34000
21000
34000
45000
1890000
37000
23000
37000
50000
2100000
40000
24000
40000
60000
2520000
44000
27000
44000
70000
2940000
48000
29000
48000
80000
3360000
52000
31000
52000