conc	affected	exposed
1	24.8	23	30
2	24.6	30	30
3	23	29	31
4	21	22	30
5	20.6	23	26
6	18.2	7	27
7	16.8	12	31
8	15.8	17	30
9	14.7	10	31
10	10.8	0	24