Prior to the introduction of the Global Industry Classification Standard (GICSÂ®) in 1999, Standard & Poorâs used a classification system with 11 sectors and 115 industries, similar to the Standard Industry Classification (SIC), which was introduced in 1937.
Symptoms: Mood-change, lethargy,irritability,confusion,fatigue and memory problems and myself chest pain this past 5 months, could the gas be the problem? Doctor : Thank you for your question. Natural gas or propane inhalation for extended periods of time can lead to headaches, nause a, shortness of breath, dizziness, and altered mental status. It is quite likely that this exposure could be eliciting your symptoms.
How to find leaks in gas piping: How to Identify & Correct LP Gas or Natural Gas Leaks. 1  GAS LEAK DETECTION, LP / NG - CONTENTS: How to Identify & Correct LP Gas or Natural Gas Leaks in gas piping, at controls, valves, regulators, connections, and appliances. How to report defects found in oil or gas piping inspections. Home inspection report language examples for oil or gas piping defects and leaks.