March 31, 2008 - The blue receptacles are being placed alongside existing bins at drop-off sites throughout the county.Only certain plastics will be accepted. These markings denote the grade of plastic, and these two grades consist of such items as water and soda bottles, or milk and shampoo containers. Plastic caps, a different grade, should be removed.Sapp said much of the "pelletized" plastic leaving Waste Industries is on its way to a northern Georgia carpet manufacturer.