6. The Town of Spooksville is installing a new watermain. The contractor has submitted their disinfection proposal for you to review. The watermain is 300 mm in diameter and 1950 m long and the contractor is using a 15% bleach solution for disinfecting the pipe (starting at the beginning) a) Draw a sketch (2 marks) b) How long before the bleach solution makes its way to the end of the pipe if the flow leaving through the end bleeder is 500 L/min (4 marks) c) The contractor's plan says they will add 120 L of the bleach solution. Comment on this proposal assuming the final concentration for disinfecting the pipe according to regulations is 25 mg/L (4 marks) d) This is a long pipe- how frequently are you supposed to have bleeders (what is the maximum length of pipe to be done in sections)