A community of 510,000 people generates wastewater at a rate of 105 gallons/capita/day. The

community is growing at a rate of 0.50 percent per year. When designing a new WWTF, design flows

are typically projected 15 years into the future.

Part a. Using the typical detention time, calculate the volume of primary clarification needed (in cubic

feet).

Part b. If ten parallel rectangular clarifiers are to be designed, provide the dimensions (in feet) of each

tank. Use typical depths and length-to-width ratios.