How is slope length calculated?

The slope length is calculated using the Pythagorean Theorem, where the vertical distance is the rise and the horizontal distance is the run: rise2 + run2 = slope length2.

Example: If a water sampler was placed at a vertical distance of 10 feet and a horizontal distance of 20 feet from a water source, the equation would be solved like this:

102 + 202 = slope length2

100 + 400 = slope length2

500 = slope length2

√500 = slope length

 ≈22.36 feet = slope length

In this example, the facility would need more than 22 feet of tubing to cover the distance from the water sampler to the water source.

Note: A minimum tubing length of 25 feet is recommended for a vacuum pump sampler. 

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