*This figure represents a conservative estimate calculated from the Emissions Calculator. The pilot used 908 gallons of B100 and 1308 gallons of B20. UCO biofuel, which generates significantly less CO2 emissions, was also used during the pilot program but was not included in the calculations due to a lack of specific data. Life cycle analysis completed by Argonne National Laboratory found that emissions for 100% biodiesel (B100) are 76.4% lower than those from petroleum diesel. The California Air Resources Board has reported similar values for its life cycle analysis of biodiesel from various sources.