Isomeric Composition of LAB by Alkyl Chain Length. The first column lists the samples under examination. Subsequent columns two through eight classify isomers according to the number of carbon atoms in the alkyl chain, not including those in the benzene ring. For example, `C9-' represents isomers with nine or fewer carbon atoms, and `C15+' indicates isomers with fifteen or more carbon atoms. The data in the second and third rows correspond to isomeric compositions as detailed in the RENO TDR (Technical Design Report) and in the NIM paper, respectively. These indicate that LAB predominantly consists of isomers in the C11 to C13 range, with C12 isomers being the most frequent.