The broad bands at 1350 and 1550 cm-t observed m Raman scattermg from Ag m electrochemlcd cells have been observed on Ag surfaces m tunnchng structures and m uluah~gh vacuum. Both the shape and mtenslty of thus scattermg IS explamed b) the prescncc of amorphous carbon on the Ag surfaces The surface enhanced Raman (SER) spectra of molecules adsorbed on microscoptcally rough Ag often show broad lmes near 1350 and 1550 cm-l. Prevrously, thrs structure was attributed to Raman scattermg from a surface carbonate chemisorbed on the Ag [l] . Recently. it was suggested from electrochemrcal cell experunents that this structure 1s due to Raman scattermg from graplutrc carbon on the Ag surface [2] TIus asngnment was made on the basrs of the simrlarrty between this spectrum and the published Raman spectrum of amorphous (a) carbon In this letter, we present detaded quantitatrve results showing that tins structure arises from a! carbon on Ag. We present spectroscopic results obtamed from Raman studres on dehberately doped tunnel Junetlons and from Raman, Auger eiectron spectroscopy (AES), and electron energy loss spectroscopy (EELS) studies on essentrally single crystal Ag( 111) surfaces in ultrahigh vacuum (UHV). We correlate our observed Raman mtenslties with recent measurements of the Raman efficrency of graphite [3] to understand the mtensrty of thrs Raman scattering. Thus enables us to quantitatively understand the hrgb sensitivity of Rarnan spectroscopy to this very common contammant of the Ag surface. All of the data drscussed were obtained rn the backscattering geometry using various Ar+ and Kr+ * Thus work was supported by the Office of Naval Research