Water from a hand pump located near a landfill has $1 \mathrm{mg} / \mathrm{L}$ arsenic (oral carcinogenic potency factor $=1.75(\mathrm{~kg-day}) / \mathrm{mg})$. A person who lives nearby drinks $2 \mathrm{~L} /$ day water from this hand pump for $10$ years. Assume body weight of $70$ kg and $70$ years as average life duration. Chances of this person getting excess risk of cancer is $\_\_\_\_\_\_$ $\times 10^{-3}$. (rounded off to three decimal places)
