Practice Quiz

Surveying FS

Category - Land Development

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According to data in the U.S. Environmental Protection Agency’s Onsite Treatment Systems Manual document published in 2002 [EPA 625/R-00/008], what is the estimated average daily wastewater flow in gallons, per person, per day (gpcd) for a residential dwelling built before 1994?
  1. 50 to 70 gpcd
  2. 110 to 150 gpcd
  3. 200 to 275 gpcd
  4. 300 to 350 gpcd
Explanation
Answer: A - According to data in the U.S. Environmental Protection Agency’s Onsite Treatment Systems Manual document published in 2002 [EPA 625/R-00/008], the estimated average daily wastewater flow for a residential dwelling built before 1994 is 50 to 70 gpcd.

Per U.S. Census data, the average number of persons per household (2005-2009) is 2.60. Based on these values, the minimum average daily wastewater flow from indoor water use in a typical residential dwelling can be estimated at 130 - 182 gallons per day.
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