The Standard Industrial Classification (SIC) system has been replaced by the North American Industry Classification System (NAICS).  Since the Bureau of the Census has collected the information necessary to classify establishments on both an NAICS and an SIC basis, the same1998 data can be shown on both the old and the new basis in bridge tables that allow comparisons between the two systems.  These data are hereby produced for the last time on an SIC basis for 1998 at the national level only.

(a)  Distillate Fuel Oil includes Nos. 1, 2, and 4 fuel oils and Nos. 1, 2, and 4 diesel fuels.

(b)  Natural Gas includes natural gas obtained from utilities, local distribution companies, and any other supplier(s), such as independent gas producers, gas brokers, marketers, and any marketing subsidiaries of utilities.

Examples of Liquefied Petroleum Gases (LPG) are ethane, ethylene, propane, propylene, normal butane, butylene, ethane-propane mixtures, propane-butane mixtures, and isobutane produced at refineries or natural gas processing plants, including plants that fractionate raw Natural Gas Liquids (NGL).

(c)  Other energy sources include such combustible energy sources as wood waste, hydrogen, and waste oils and tars.

(d)  A Local Utility is an entity that produces and/or delivers a particular energy source (for example, electricity, natural gas, steam) and is legally obligated to provide service to the general public within its franchise area.

(e)  Sources Other than Local Utility include independent producers, brokers, marketers, and marketing subsidiaries of utilities; for the case of electricity sources, also include small power producers and cogenerators not located at the establishment site.

     Source:  Energy Information Administration, Office of Energy Markets and End Use, Energy Consumption Division, Form EIA-846, '1994 and 1998 Manufacturing Energy Consumption Surveys.'