Index

Range

Classification

Samples

(%)

CR

greater than 10E−6 and less than 10E−4

Generally satisfactory

10

83.3

>10⁻⁴

Intolerable

2

16.7

HQ

<1

Acceptable level (no concern)

12

100

>1

No carcinogenic adverse effects

-

-

HI

<1

Safe

12

100

>1

Unsafe

-

-