Information for the user-selected tariff is provided by the TAP database. These data include a unique tariff ID, and the information required to define the TOU periods for this tariff. TOU tariffs are currently available for selected utilities around the United States. Due to the complex geographic variation of some utilities in California, we developed a correspondence table to help users select their utility tariff. Within California, we generated a table that matches each 5-digit ZIP code to a specific utility service territory. This information is available at: http://hes.lbl.gov/hes/CalUtilZips.doc