Multiple choice Which of the following is Not a requirement of a landfill built today it must be lined with plastic or clay it must be a specific distance from a city or populated area it must have systems for collecting and treating leachate Vent pipes must be installed for removing methane. Reveal answer Fill a bubble to check yourself B Correct answer Explanation While landfills have strict environmental regulations, there is no federal requirement that they be a specific distance from a city, though zoning laws often dictate this locally.