The document proposes a tractor replacement program to reduce emissions at ports. It would replace older, more polluting trucks in fleets with newer models from 2006-2007 that meet stricter EPA standards. Independent contractors would lease-purchase the newer trucks through a financing agreement over 3-4 years. The program aims to replace the oldest 7.6% of tractors that account for 25.4% of particulate emissions to improve air quality at ports. It outlines the stakeholders, financial structure, replacement vehicle specifications, and contractor requirements for participation.