 In the UK the limit for a final landfill cap is 1*10−3 milligrams per square metre per second, and for a temporary cap it is 1*10−1 mg/m2/s (as measured using the Environment Agency's " Guidance on Monitoring landfill gas surface emissions " LFTGN 07, EA 2004).Surface monitoring can be broken down into Instantaneous and Integrated.Instantaneous monitoring consists of walking over the surface of the landfill, while carrying a flame ionization detector (FID).