A chemical company is directly disposing of its wastewater into a river at a rate of $23\frac{m^3}{m}in.$ There are several different contaminants found within this wastewater, but the largest is chloroform, which was found to be at a concentration of $2,000m\frac{g}{L}$ within the wastewater. The river has a flowrate of $900\frac{m^3}{?}$ minute and a town of $180,000$ people utilize this river as a source water for drinking water with an hourly demand of $3,300m\frac{3}{h}r.$

a$.$ What is the concentration of chloroform within the drinking water if is not treated to remove chloroform? Assume that the concentration in drinking water will be the same as the concentration in the source water when it is not treated for.

b$.$ What is the lifetime risk of cancer for an adult female if they shower everyday for $10$ minutes $($where half of the body surface area is exposed to water, dermal permeability is $0\mathrm{.}10c\frac{m}{h}r).$ May assume chloroform is not airborne. Make relevant assumptions about lifetime, water consumption rates, body weight, etc.

c$.$ How many people in this town can be anticipated to get cancer assuming the risk is consistent for everybody?

d$.$ It is determined that a Hazard Index of $0\mathrm{.}9$ or less must be achieved for safe drinking water. What is the concentration of chloroform that it needs to reduced to in order to meet this?

e$.$ A batch reactor was utilized to find out that a catalyzed reaction was able to reduce the chloroform concentration by $50\%$ in $4$ hours via a first order decay reaction, find out what the reaction rate constant is$.$

f$.$ What is the detention time and reactor volume for a CSTR and a PFR that must reduce the chloroform concentration from what was seen in part A down to what was seen in part D$?$ Which of these reactors would you suggest using and why?