As part of Boeing's life cycle approach to reducing environmental impact, and in response to requests from the Brazilian carrier GOL and other customers, Boeing introduced a chrome-free primer to complement chrome-free exterior decorative paint, which Boeing has used for more than a decade. In addition to simplified health and safety monitoring requirements, a chrome-free primer reduces the environmental impact of the paint and stripping process. Using a chrome-free primer eliminates the need for designated off-site disposal areas and special handling of paint waste and clean up. Such advantages also are of benefit when the airplane is prepared for repainting. This treatment has also has been used on the AH-64 Apache for several years.