Your consulting firm is asked to design an activated carbon adsorption system to treat contaminated groundwater containing 10 mg/L of benzene with a treatment goal of 99% reduction in benzene concentration before injection into groundwater. The extraction well pumps groundwater at 100 gpm. The activated carbon removal capacity is expressed as the following Freundlich equation: 9 (mg/kg) = 0.2 CO.2, where Cis concentration (mg/L) of benzene after adsorption equilibrium. (a) What is the amount of activated carbon (kg) needed per day? (b) If the packing density of activated carbon is 1.2 g/L, how many 55-gallon tank it would fill? Approximate to nearest number exceeding the amount of activated carbon required.