Locate an area where you can dig a hole. The site should be at least one yard by one yard. Dig a hole. 18 inches deep.12 inches wide.If possible put a few cm of gravel inside the hole.Fill your hole with water and place a board over the hole as shown in this week's reading materials.Take a picture at this step. Measure the distance of the water from the board. Your first measurement will be when you first fill the hole. Your water should meet the board.Repeat your measurement every two minutes until you have five measurements.Each time you take a measurement subtract it from the previous measurement to see how far the water has dropped over that two minutes.Calculate the drop in minutes per inch.This week's reading materials show examples of how to do this calculation. Average your five drop measurements (minutes/inch). If the result is between six minutes per inch and 60 minutes per inch, then the soil passes the test, and it should be capable of supporting a perc test.
Question
Locate an area where you can dig a hole. The site should be at least one yard by one yard. Dig a hole. 18 inches deep.12 inches wide.If possible put a few cm of gravel inside the hole.Fill your hole with water and place a board over the hole as shown in this week's reading materials.Take a picture at this step. Measure the distance of the water from the board. Your first measurement will be when you first fill the hole. Your water should meet the board.Repeat your measurement every two minutes until you have five measurements.Each time you take a measurement subtract it from the previous measurement to see how far the water has dropped over that two minutes.Calculate the drop in minutes per inch.This week's reading materials show examples of how to do this calculation. Average your five drop measurements (minutes/inch). If the result is between six minutes per inch and 60 minutes per inch, then the soil passes the test, and it should be capable of supporting a perc test.
Solution
- Find a suitable location where you can dig a hole. The area should be at least one yard by one yard.
- Dig a hole that is 18 inches deep and 12 inches wide.
- If possible, add a few centimeters of gravel to the bottom of the hole.
- Fill the hole with water and cover it with a board, as demonstrated in this week's reading materials.
- Take a photo of the hole at this stage.
- Measure the distance from the water to the board. This should be done immediately after filling the hole, with the water level reaching the board.
- Repeat this measurement every two minutes until you have a total of five measurements.
- Each time you measure, subtract the current measurement from the previous one to determine how much the water level has dropped over the two-minute interval.
- Calculate the rate of water level drop in minutes per inch. Refer to this week's reading materials for examples of how to perform this calculation.
- Average your five measurements of the drop rate (in minutes per inch).
- If the average drop rate is between six minutes per inch and 60 minutes per inch, the soil passes the test. This indicates that it should be capable of supporting a perc test.
Similar Questions
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