For Pingzheng Environmental Engineering Co., STELLA prepared a Project Idea Note (PIN) that was submitted to the International Finance Corporation (IFC), the potential buyer of Certified Emission Reductions (CERs). STELLA also prepared a Project Design Document (PDD) to register the project of landfill gas recovery in Mianyang and Guang Yuan as a Clean Development Mechanism (CDM) project under the Kyoto Protocol. The project located in two cities located north of Chengdu in the Sichuan Province aimed at collecting and flaring or capturing the landfill gas to produce energy (electricity and heat), therefore reducing methane emissions from the two cities' landfills. Overall, the project planned to reduce total greenhouse gas emissions (GHG) by 822,591 tonnes of CO2eq for the period 2006-2012. STELLA prepared the different parts of the PDD, including a description of the project activities and their duration, the baseline and monitoring methodologies, the estimation of GHG emissions by sources, the potential environmental impacts, and stakeholders' comments. First, STELLA described the different reuse options for the biogas recovered, such as flaring, fuel for vehicles, waste incineration, and electricity production and conducted economic and financial analyses. According to the financial model developed by the project team, converting the gas to electricity provides the highest Net Present Value. STELLA then prepared the conceptual design of collection, recovery, and combustion systems, identified data to be collected, and described the quality control and assurance procedures that will be undertaken to monitor the reduction of GHG emissions. STELLA also carried out a preliminary environmental assessment of the proposed CDM project and identified relevant local stakeholders (mainly neighbours of the landfills) to seek their views on the project and take into account their comments during the preparation of the PDD.