4.1 – 4.10 The solutions for these problems are the solutions for problems 4.1 – 4.10 in
the 2nd edition Solutions Manual.
4.11 a.
b. Denver deaths due to cosmic radiation exposure:
c.
d.
⎠
⎝
⎠
⎝
4.12 Radon exposure of 1.5 piC/L equivalent to 400 mrem/yr (0.4 rem/yr):
a.
b.
4.13-4.14 The solutions for these problems are the solutions for problems 4.13 – 4.14
in the 2nd edition Solutions Manual.
4.15 Data is taken from Tables 4.9 and 4.10
a.
()( )( )
()( )( )( )
durationfreqrate intakePF
yr
d
365lifespanbody wtrisk
conc ⎟
⎠
⎞
⎜
⎝
⎛
=
b.
()( )( )
()( )( )( )
durationconcrate intakePF
yr
d
365lifespanbody wtrisk
freq ⎟
⎠
⎞
⎜
⎝
⎛
=
4.16 a. Use Table 4.11 oral RfDs and Table 4.10 for other factors
c. Use Table 4.9 for PFs and Table 4.10 for other factors
4.17 a.
3
yr
life
yr 25
d 250
m 20
mg 0.00002
dkg 50
⎠
⎝
⎠
⎝
⎞
⎛
⎞
⎛
⎞
⎛
⎞
⎛
⎞
⎛⋅
c. The 2006 U.S. cancer rate of 24% taken from text in Section 4.2 is the same
d. From Table 4.11 RfDs for both arsenic and mercury are 0.0003 mg/kg·d
4.18 – 4.26 The solutions for these problems are the solutions for problems 4.15 – 4.23 in
the 2nd edition Solutions Manual.
4.27 260 million people, 2L/day, 360d/yr, 30yr, find risk and incremental cancers for,
a. trichloroethylene at 0.005 mg/L:
b. benzene at 0.005 mg/L:
c. arsenic at 0.01 mg/L:
d. carbon tetrachloride at 0.005 mg/L:
e. vinyl chloride at 0.002 mg/L:
f. PCBs at 0.0005 mg/L:
4.28 – 4.33 The solutions for these problems are the solutions for problems 4.25 – 4.30 in
the 2nd edition Solutions Manual.