Ask your propane company about permits as they'll usually handle this aspect of the installation and file all required paperwork. You can also contact the city code compliance office to ensure that all necessary gas permits and requirements are adhered to before the propane tank installation takes place.
Basically, a hernia is a defect in the abdominal wall that allows intestine to poke through. If the hernia becomes incarcerated (the intestine becomes strangled), then a blockage and rupture of the bowel can occur. This is life threateneing. Many people survive, but are permanently disfigured. A perforated bowel can mean months in the hospital, large portions of the bowel being removed, etc.
Ventral Hernia. Hernias most commonly develop in the abdominal wall, where an area weakens and develops a tear or hole. Abdominal tissue or part of the intestines may push through this weakened area, causing pain and potentially serious complications. Ventral hernias are a type of abdominal hernia. They may develop as a defect at birth, resulting from incomplete closure of part of the abdominal wall, or develop where an incision was made during an abdominal surgery, occurring when the incision doesn't heal properly.