Using the C$$t values from Table $11\mathrm{.}8($see class handouts$)$ determine the $($a$)$ Chick$-$

Watson inactivation rate constant for free chlorine at pH ~$8,10\backslash$deg C$,($b$)$ estimate the concentration of free

chlorine needed to achieve a $3\mathrm{.}5$ log inactivation of Giardia Lamblia within $60$ minutes at these same

solution conditions? Assume that the disinfectant concentration remains stable for the entire $60$ min time

period. $($b$)$ Repeat for preformed chloramines.