0 0 SECONDARY SAMPLING: AVERAGED
1 1 SECONDARY SAMPLING: DISCRETE
2 2 SECONDARY SAMPLING: MIXED
3 3 NEAR-SURFACE SAMPLING: AVERAGED, PUMPED
4 4 NEAR-SURFACE SAMPLING: AVERAGED, UNPUMPED
5 5 NEAR-SURFACE SAMPLING: DISCRETE, PUMPED
6 6 NEAR-SURFACE SAMPLING: DISCRETE, UNPUMPED
7 7 NEAR-SURFACE SAMPLING: MIXED, PUMPED
8 8 NEAR-SURFACE SAMPLING: MIXED, UNPUMPED
15 15 MISSING VALUE
