The presence of oil is only the presence of oil; it doesn't "prove" anything else. Showing it as an illustration of more serious contamination is just being deceptive. The real problem with contaminated water is that it looks the same as uncontaminated water. And, in fact, the water may be acceptable...but the stream bed may contain contamination.
The presence of oil is only the presence of oil; it doesn't "prove" anything else. Showing it as an illustration of more serious contamination is just being deceptive. The real problem with contaminated water is that it looks the same as uncontaminated water. And, in fact, the water may be acceptable...but the stream bed may contain contamination.