A) # of Disinfection Clearwells: 3 B) Clearwell Operation Style: Parallel (to provide contact time for disinfection using free chlorine (derived from a hypochlorite solution generated onsite). C) The facility's existing system to generate hypochlorite onsite has reached the end of its useful life, and the current operating capacity is insufficient to generate the required mass flow of hypochlorite to accommodate the future capacity of 34.5 MGD. Assume the facility plans to stop generating hypochlorite onsite and will instead purchase a bulk solution of sodium hypochlorite D) Sodium hypochlorite (NaOCI) concentration: 6.25% NaOCI by mass E) Bulk Density: 1,100 kg/m^3 F) Clearwell T10/DT Ratio: (CW1 0.43). (CW2 = 0.51), (CW3 = 0.58) DT is the theoretical mean hydraulic retention time (V/Q) G) pH: 7.0 H) Design Temperature: 15°C 1) 50% of Chlorine is lost in each clearwell J) If the concentration going into the clearwell is C, then you can assume that the concentration leaving the clearwell will be C/2. 1) Determine if the existing disinfection system is sufficient to accommodate the projected future capacity. A) Current Capacity: 22.5 MGD B) Future Capacity: 34.5 MGD for 110,000 residents C) If not, design upgrades to the disinfection system as follow below. 2) Determine the log10 reduction requirements for Giardia and viruses. Assume there are no reduction requirements for Cryptosporidium. 3) Determine the CT value needed to comply with log10 reduction requirements this should be a single CT value that meets or exceeds the requirements for both pathogen groups. Consult the CT value look up tables in the appendices below. 4) Determine whether you will operate the clearwells in series or in parallel and provide a justification for your decision. If changes are needed to the current pipe configuration, those should be shown and described. 5) Determine what residual chlorine concentration must be present at the effluent of each of the clearwells in order to achieve the required CT value. 6) Determine, estimate the volume of 6.25% NaOCI bulk solution that is needed each day to supply the required dose at the future design flow rate of 34.5 MGD.