The problem of H2S attack (which results in sulfuric acid attack) has been recognized for more than 60 years. It causes serious deterioration in concrete sewers and structures if the requisite concentrations and conditions occur. Attack is usually encountered only in larger sewers or under unusual circumstances. The ability of PVC to resist deterioration when exposed to a wide range of chemical substances is well known. Using mechanically anchored PVC protective liners, enables pipes and concrete structures to be fully protected from chemicals. PVC liners provide much lower maintenance, and extends longevity compared to other methods.