1. Based on the information from the reading, determine which type of contamination, biological or chemical, is present in the following
scenarios. Explain.
a. Thousands of cars travel on city roads every day. The tires rub
against the road and leave behind small flakes of rubber. When the
brakes are used, tiny amounts of copper flake off. Eventually the
rubber and copper get washed into streams and rivers.
b. You wash your car with soap in the driveway. Soapy water drains
down the gutter and into the storm drain, and eventually runs into a
river, lake, or bay.
c. Scientists discovered that droppings from seagulls in a restored
salt marsh were spreading to shallow ocean waters near a beach.
Officials closed the beach to swimming because the bacterial
contamination was thousands of times higher than the limit that
people could safely be exposed to.