Description: The National Pipeline Mapping System (NPMS) includes a geographic information system (GIS) dataset containing the location and selected attributes of gas transmission and hazardous liquid pipelines, liquefied natural gas (LNG) plants and breakout tanks (BOT) under jurisdiction of the Pipeline and Hazardous Materials Safety Administration (PHMSA). Effective October 1, 2015 pipeline and LNG plant data is collected annually from pipeline operators as required by 49 CFR §§ 191.29 and 195.61. This metadata is for the breakout tanks dataset. The NPMS breakout tanks dataset contains spatial data for breakout tanks subject to regulations from the Pipeline and Hazardous Materials Safety Administration (PHMSA). However, at this time it is optional for operators to submit breakout tank data to the NPMS; therefore this dataset cannot be considered complete. Distribution of NPMS data in GIS format is handled for PHMSA by the National Repository and is limited to pipeline or facilities operators and local, state, tribal, and federal government officials and is subject to data access limitations and agreements. Fulfillments of data requests will include data only for the area of jurisdiction of the person requesting the data (data requests are fulfilled per county/counties, state, or the entire U.S.). Instructions for requesting NPMS data in a GIS format are outlined on the NPMS website at www.npms.phmsa.dot.gov.