42 Chemical engineering; engineering services in the field of microbiology and bioprocesses, and chemicals production, fuel blending, performance of co-products and by-products, chemical distribution; engineering services in the fields of feedstock and fuel blending, creating co-products and by-products; Design of infrastructure for refineries, petrochemical and industrial concerns; engineering services in the field of the production of diesel, gasoline, fuel additives, fuel feedstocks, paraffinic waxes, and specialty chemicals, including chemical additives for general industrial use and for health and safety related purposes