(a) The North American Industry Classification System (NAICS) has replaced the Standard Industrial Classification (SIC) system.

(b) 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.

(c) 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.

(d) 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).

(e) Four components of Biomass are collected: agricultural waste, wood harvested directly from trees, wood residues and byproducts from mill processing, and wood-related and paper-related refuse.  The average price of Biomass Total is computed as the sum of the dollar expenditures for those four components divided by the sum of the Btu quantities purchased of those four components. The 'Biomass Total' does not include pulping liquor or black liquor.

(f) The price estimates for coal in NAICS 3313 and 331312 include anthracite coal for the production of carbon anodes.  Due to the high cost of transporting anthracite from the East Coast to the South and West, the prices of coal in those regions are relatively high.    

Notes: Totals may not equal sum of components because of independent rounding.

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