1.A time interval of 1.5 hours is recorded for a 6 inch drop of water level in a percolation (perc) test hole. What is the perc rate? How many laterals would be required in the leaching field to serve a 5 bedroom house, if the trench width is 2 feet and the maximum trench length is 80 feet?
2.What is the maximum population that can be served by a 900 mm diameter main sewer constructed on minimum grade? If sewage flow in the pipe never exceeds a depth of 600 mm, estimate the actual population contributing flow to the main.