What is the formula for calculating the Rate of Contamination?

The formula for calculating the Rate of Contamination is designed to determine the concentration of contaminants over a specific distance between two sampling points. The correct calculation involves taking the difference between the two sample results to see how much the contamination has changed between the initial and subsequent sample points. Thus, the formula involves subtracting the second sample result from the initial sample result, allowing for an assessment of how contamination levels vary across the sampled area.

This difference illustrates the change in contamination levels and provides a relative measure of contamination spread when adjusted for the distance between the sample points. By dividing this difference (the change in contamination levels) by the distance, one can better understand the rate at which contamination is occurring.

Using a different approach, such as simply adding the results of the samples together or manipulating them in other ways without accounting for the necessary difference and distance would not provide an accurate portrayal of the rate of contamination. These elements are critical in environmental assessments to ensure that the impact of contaminants is thoroughly understood and effectively managed.