212Pb

214Pb

40K

137Cs

Total Risk (10−6)

Average daily intake (pCi)

0.423

0.585

14.679

0.585

Slope factor (risk/pCi) [22]

2.50 × 10−11

0.034 × 10−11

2.47 × 10−11

3.04 × 10−11

Risk (10−6)

0.386 × 10−2

7.356 × 10−5

0.132

0.650 × 10−2

0.142