Significant portions of landfilled biogenic carbon (e.g., putrescibles, woods and papers) are not completely decomposed by the anaerobic condition, and the carbon is stored in the landfill body. Thus, the landfill serves as a long-term anthropogenic sink for GHG calculation (USEPA, 2006). However, the fossil carbon that remains in the landfill is not counted as stored carbon because it is of fossil origin and already considered exists in its natural state. The biogenic carbon storage is calculated using a method as discussed in IPCC (2006). In this context, the fraction of DOC that can be decomposed in the anaerobic condition in LFE is assumed to be 0.5 (mass fraction). In other words, 50% of the disposed DOC would remain in LFE for a long period.