Social studies varies greatly as a subject between countries and curricula and is not synonymous with sociology or social science; some courses borrow heavily from the social and political sciences, whereas others are created independently for schools.
Customer support for City of Hidalgo (TX) can be reached online at cityofhidalgo.net. Reach City of Hidalgo (TX) by phone at (956) 843-2286.
The CGA can be reached at 1-703-788-2700. Additional information is available in Quick Tips #136: Gas Cylinder Storage and Handling. And remember, it is always important to check state and local codes. Your local fire marshall is recommended as a source of information to assure you are in compliance.