DVD Content Summary - NATURAL GAS AND NGL SAMPLING: Discusses natural gas and NGL sampling fundamentals. Demonstrates procedures and safe practices for taking natural gas samples. Shows equipment, procedures and safe work practices used for NGL sampling. NGL MEASUREMENT I: Covers Natural Gas Liquid Measurement, including basic components of an NGL metering station, how those components are used, methods for NGL measurement and factors affecting accuracy. NGL MEASUREMENT II: Takes a close look at NGL measuring devices, along with the basic principles involved in proving or witnessing an NGL meter.