The issue focused on ethanol blends containing ethanol derived from cellulosic biomass rather than cellulosic ethanol derived from biomass sourced from cellulosic biomass waste.[ PubMed Ketelsen et al., 2001 ]. Methanol contamination has become more prevalent due to ethanol refining procedures such as chlorine dehydration or ammonia disinfection.[ Citation McKenzie et al., 1999 ]. McKenzie et al.,1999 ]. McKenzie et al.,1999 ]. McKenzie et al.,1999 ]. McKenzie et al.,1999 ]. McKenzie et al.,1999 ]. McKenzie et al.,1999 ].