Short Answer: Select 4 of the questions from the list below and answer them in the defined boxes. Be neat, clear and concise in your answers. 1. Describe how the time of day for water sample collection affects the pH and dissolved oxygen levels. 2. Compare the characteristics of groundwater, stationary bodies of water (lakes, ponds), and flowing bodies of water (streams and rivers). 3. What is the difference between the primary drinking water contaminants and the secondary drinking water contaminants? 4. How do the contaminants regulated by the Safe Drinking Water Act change