Gas Chromatography-Mass Spectrometry (GC/MS) As It Relates To Urine Drug Testing. Gas Chromatography-Mass Spectrometry (or GC/MS) is a two-step methodology used to identify different substances within a test sample. GC/MS is widely used due to its ability to perform a specific test, and is an extremely effective in identifying the presence of a specific substance within a given sample.
(name). (email). To: (email). The Gateway Arch, 630 feet tall and another 630 feet wide, is an elegant frame to the historic city of St. Louis. A gigantic endeavor in its time, the arch is almost 100 feet taller than the Washington Monument and more than twice the height of the Statue of Liberty.
15 Things You May Not Know About the Gateway Arch. St. Louisâs glimmering Gateway Arch has a lot to brag about: At 630 feet, it's Americaâs tallest memorial, the Western Hemisphereâs tallest monument, and the worldâs tallest arch. But the tribute to Americaâs westward growth didnât rise into the Midwestern sky without overcoming a few hurdles. Here are a few facts about the Gateway Archâs bumpy road from conception to construction, and beyond. 1. ST. LOUISANS DISAPPROVED OF PLANS FOR A MONUMENT.