The document discusses internal and external protection of LNG tanks. Unauthorized individuals should be kept away from tanks and signs displaying no smoking or other hazards should be posted. Tanks should also be protected from unauthorized access by locking valve covers and enclosing the tank area. The side and bottom portions of in-ground tanks have a protective concrete layer surrounded by insulation and a membrane. Other considerations for tank installation include impact protection, ventilation, site selection ensuring tanker access and security, and planning for emergency response.