This document provides details on an environmental management plan project conducted in 1999-2000 for the CIB Refinery of ECOPETROL in Colombia. The project developed an environmental impact study and instructions to improve the refinery's environmental performance from 2000-2010. It involved assessing waste management practices and developing recommendations to align them with national and international standards. The author was contracted to build an environmental index to monitor waste disposal management at the refinery.