Modified contamination degree mCd

Modified degree of contamination

mCd < 1.5

1.5 ≤ mCd < 2

2 ≤ mCd < 4

4 ≤ mC < 8

8 ≤ mCd < 16

16 ≤ mCd < 32

mCd ≥ 32

Nil to very low degree of contamination

Low degree of contamination

Moderate degree of contamination

High degree of contamination

Very high degree of contamination

Extremely high degree of contamination

Ultra high degree of contamination